CN201654495U - Satellite timing machine - Google Patents

Abstract

The utility model discloses a satellite time service integrated machine. The utility model integrates the remote end and the near end used for satellite timing, and uses cables to exchange differential signals with the timed equipment. Since the reliable transmission distance of the differential signal is greater than that of the single-ended electrical characteristic signal, even with the timed equipment The cable transmission distance between them is greater than 10 meters, which can also ensure the effective transmission of time scale signals and time information. At the same time, the utility model also measures the time delay of the cables and the time delay of the time scale signals according to the measurement results. Calibration can reduce the time scale signal error caused by the extension of the transmission distance, so it can also ensure the accurate transmission of the time scale signal; moreover, because the far end and the near end are integrated, there is no gap between the far end and the near end. Various problems caused by the RF cable length exceeding 100 meters. Therefore, the utility model can simultaneously ensure the convenience of engineering installation and the reliability of timing.

Description

Satellite timing machine

technical field

The utility model relates to satellite time service technology, in particular to a satellite time service integrated machine.

Background technique

In modern communication and measurement and control systems, it is necessary for multiple devices to maintain mutual synchronization between the time systems for a long time, and the synchronization accuracy needs to reach the sub-microsecond (us) level or even nanosecond (ns) level. At present, the timing schemes that can achieve sub-us level or ns level synchronization accuracy include ground wired timing system and satellite timing. Among them, the ground wired time service network is generally a local time service private network, but it cannot be widely used due to the limitations of the network deployment area and network privateness; while the satellite time service has the characteristics of openness, wide coverage, high precision, and low cost. Wide range of applications.

Figure 1 simply shows an existing split-type satellite timing device, which at least includes a remote external GPS antenna 110 and a near-end GPS star card 120, and the connection between the far-end and the near-end is realized by a radio frequency cable 130 RF signal transmission from the GPS antenna 110 to the GPS star card 120 , and power feeding from the GPS star card 120 to the antenna 110 . Wherein, the remote external GPS antenna 110 includes at least a single-mode antenna feed 111, a filter circuit 112, etc., while the near-end GPS star card 120 has a single-mode positioning solution function for receiving data from the GPS antenna 110. The time scale signal (1PPS) and time information (TOD) are calculated from the positioning solution of the satellite signal, and the time scale signal and time information are sent to the timed equipment through the single-ended electrical characteristic signal 140, so as to realize the timing of the timed equipment.

However, since the near-end GPS star card 120 and the time-serving device adopt a single-ended electrical characteristic signal 140, that is, a signal that only takes the ground as a reference, in order to avoid the transmitted signal from being interfered, only the near-end GPS star card 120 The transmission distance with the timing device is limited within 10 meters.

In addition, the length of the RF cable between the far end and the near end cannot exceed 100 meters because of the loss caused by the RF cable. Therefore, when it is necessary to ensure that the transmission distance between the near-end star card and the timed device does not exceed 10 meters, and the length of the radio frequency cable between the far-end and the near-end does not exceed 100 meters, it will make the far-end and the near-end The near-end engineering installation is more difficult; on the contrary, if the above-mentioned distance limit cannot be ensured during engineering installation, the timing reliability of the split satellite timing equipment to the timing equipment will be greatly reduced due to the unsatisfied ideal working conditions.

Utility model content

In view of this, the utility model provides a satellite time service integrated machine, which can extend the physical distance between the satellite time service integrated machine and the timed equipment.

The utility model provides a satellite time service integrated machine, comprising:

an antenna, which receives satellite signals;

A filter circuit, which filters satellite signals received by the antenna;

A positioning calculation circuit, which performs positioning calculation on the filtered satellite signal, obtains a time scale signal and time information, and sends the obtained time scale signal to the time delay compensation circuit and the microcontroller;

Also includes: a microcontroller, a measurement circuit, a delay compensation circuit, a differential communication circuit, wherein:

A measurement circuit, which interacts with the timing device through the differential communication circuit for the calibration sequence, and observes the local time of sending the calibration sequence and the local receiving time of the calibration sequence fed back by the timing device;

Delay compensation circuit, which calibrates the time scale signal obtained by the positioning solution circuit according to the time when the measurement circuit sends and receives the calibration sequence and the time when the time service device receives and receives the calibration sequence, and passes the calibrated time scale signal through the differential communication circuit Send to the timed device;

Microcontroller, which sends the corresponding time information obtained by the positioning resolving circuit to the timing device through the differential communication circuit according to the time scale signal obtained by the positioning resolving circuit, and synchronizes the time information with the calibrated corresponding time scale signal Sending, and also notifying the timing device through the differential communication circuit of the time when the measurement circuit receives the calibration sequence, and receiving the time when the opposite end sends and receives the calibration sequence notified by the timing device;

The differential communication circuit exchanges differential signals with the timed equipment through cables.

The microcontroller further controls the sending and receiving state of the differential communication circuit, so that the differential communication circuit exchanges differential signals with the timed device through cables in a half-duplex manner.

The positioning calculation circuit, the measurement circuit, the delay compensation circuit, and the differential communication circuit are connected to the microcontroller bus, and the positioning calculation circuit is further connected to the microcontroller and the delay compensation circuit through a direct connection signal line, and through A direct signal line sends the timing signal to the microcontroller and the skew compensation circuit.

The measurement circuit consists of:

A calibration sequence generator, which generates a calibration sequence and sends it to the timed device through a differential communication circuit;

A sending time observer, which observes the local sending time of the calibration sequence generated by the calibration sequence generator, and sends it to the delay compensation circuit through the microcontroller bus;

The receiving time observer receives the calibration sequence fed back by the timing device through the differential communication circuit, observes the local receiving time of the calibration sequence, and then sends it to the delay compensation circuit through the microcontroller bus.

The calibration sequence generator is connected to the sending time observer through a direct connection signal line, and the receiving time observer is connected to the differential communication circuit through a direct connection signal line.

Differential communication circuits include:

A transmission selector, which selects one of the calibration sequence generated by the calibration sequence generator and the time scale signal calibrated by the delay compensation circuit to send to the first half-duplex differential transceiver;

The first half-duplex differential transceiver sends the channel selected by the transmission selector to the timed device in the form of a differential signal through the cable, and sends the calibration sequence fed back by the timed device received through the cable to the receiver time observer;

The first transceiver controller, which is connected to the microcontroller bus, is controlled by the microcontroller, and controls the transmission selector to select the calibration sequence generated by the calibration sequence generator when the cable needs to be measured, and controls when calibration is required. The transmit selector selects the time scale signal calibrated by the delay compensation circuit, and controls the transmitting and receiving state of the first half-duplex differential transceiver;

The second half-duplex differential transceiver, which sends the aforementioned notification of the timed device received through the cable to the microcontroller, and also sends the aforementioned notification from the microcontroller to the timed device in the form of a differential signal;

The second transceiver controller is connected to the microcontroller bus to be controlled by the microcontroller, and controls the transceiver state of the second half-duplex differential transceiver.

The cables include:

1 power line, 1 ground line, and 2 differential signal lines of the first half-duplex differential transceiver;

One power line, one ground line, and two differential signal lines of the second half-duplex differential transceiver.

The first transceiver controller further triggers the calibration sequence generator or triggers the transmission time observer when the cable time delay needs to be measured.

The antenna is a multi-mode antenna, and the positioning calculation circuit is a multi-mode positioning calculation circuit.

The time information is sent within one second after the calibrated corresponding time scale signal is sent, so as to ensure that the time information is sent synchronously with the calibrated corresponding time scale signal. .

It can be seen from the above technical solution that the utility model integrates the remote and near ends used for satellite timing, and uses cables to exchange differential signals with timed equipment. Since the reliable transmission distance of differential signals is greater than that of single-ended electrical characteristic signals, Therefore, even if the cable transmission distance between the time-serving equipment is greater than 10 meters, it can also ensure the effective transmission of time scale signals and time information. The time-delay calibration of the time-scale signal reduces the time-scale signal error caused by the extension of the transmission distance, thus ensuring the accurate transmission of the time-scale signal; moreover, since the far-end and the near-end are integrated, there is no remote Various problems caused by the length of the RF cable between the end and the near end exceeding 100 meters. Therefore, the utility model can simultaneously ensure the convenience of engineering installation and the reliability of timing. Further, the utility model can use a half-duplex mode to multiplex cables.

Description of drawings

Fig. 1 is a simple structure schematic diagram of a split type satellite timing device in the prior art;

Fig. 2 is the exemplary structure schematic diagram of satellite time service all-in-one machine in the utility model embodiment;

Fig. 3 is a kind of specific structural representation of satellite time service integrated machine in the utility model embodiment;

Fig. 4 is another kind of concrete structure schematic diagram of satellite time service integrated machine in the utility model embodiment;

Fig. 5 is an exemplary flow chart of the measurement process of the satellite timing service integrated machine in the embodiment of the present invention;

Fig. 6 is the interaction sequence diagram of the integrated satellite timing machine and the timed equipment in the measurement process in the embodiment of the present invention;

Fig. 7 is an exemplary flow chart of the timing process of the integrated satellite timing machine in the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings and examples.

In this embodiment, the far-end and the near-end used for satellite timing are integrated, and the cable is used to exchange differential signals with the timed equipment. Since the reliable transmission distance of the differential signal is greater than that of the single-ended electrical characteristic signal, even with the timed equipment The cable transmission distance between them is greater than 10 meters, and it can also ensure the time scale signal and time information (the time information described in this paper, in addition to the time information itself, can further include other information such as navigation and positioning information, control information, etc. information known to those skilled in the art), and at the same time, this embodiment also reduces the transmission distance caused by the extension of the transmission distance by measuring the cable delay and calibrating the delay of the time scale signal according to the measurement results. The time scale signal error can ensure the accurate transmission of the time scale signal; moreover, since the far end and the near end are integrated, there is no problem caused by the length of the radio frequency cable between the far end and the near end exceeding 100 meters. Various problems. Therefore, the convenience of engineering installation and the reliability of timing can be ensured at the same time.

Fig. 2 is a schematic structural diagram of an exemplary satellite timing service integrated machine in an embodiment of the present invention. As shown in Figure 2, the integrated satellite time service machine in this embodiment includes: antenna 202, filter circuit 203, positioning solution circuit 204, microcontroller 205, measurement circuit 206, delay compensation circuit 207, differential communication circuit 208, Wherein, the positioning calculation circuit 204 , the measurement circuit 206 , the delay compensation circuit 207 , and the differential communication circuit 208 are connected to the microcontroller 205 bus and coupled with the microcontroller 205 .

Antenna 202, which can be a single-mode antenna feed source adopted by existing split satellite timing equipment, or any multi-mode antenna, for receiving satellite signals;

Filtering circuit 203, which can be any existing circuit with a filtering function, a logical or physical circuit for filtering satellite signals received by the antenna 202;

Positioning solution circuit 204, which can be any logical or physical circuit with single-mode positioning settlement function for single-mode antenna feed, or any logic with multi-mode positioning settlement function for multi-mode antenna Or a physical circuit, which is used to perform positioning calculation on the satellite signal filtered by the filter circuit 203, and obtain a time scale signal and time information, and send the obtained time scale signal to the time delay compensation circuit 207 and the microcontroller 205;

Measuring circuit 206, which may be a logic circuit that calibrates the sequence in any way and has a time recording function, is used to exchange the calibration sequence with the timed device through the differential communication circuit 208, and observe the local time when the calibration sequence is sent, and The local receiving time of the calibration sequence fed back by the timing equipment;

Delay compensation circuit 207, which can be a logic circuit that can implement delay compensation calculations according to the existing two-way delay compensation principle, and is used to send and receive the local time of the calibration sequence according to the measurement circuit 206, and the opposite end sent and received notified by the time service device The time of the calibration sequence is calibrated to the time scale signal obtained by the positioning solution circuit 204 (the principle of two-way time delay compensation on which the specific calibration process is based belongs to the prior art, and will not be repeated here), and the calibrated time scale signal The marking signal is sent to the timed device through the differential communication circuit 208;

Microcontroller 205, which can be any logic circuit with a control function, is used to send the corresponding time information obtained by the positioning resolving circuit 204 through the differential communication circuit 208 to The time-serving device sends the time information synchronously with the corresponding time scale signal calibrated by the delay compensation circuit 207, and notifies the time-serving device of the time when the measurement circuit 206 receives the calibration sequence through the differential communication circuit 208, and receives the timing information of the time-serving device The time for the notified peer to send and receive the calibration sequence; where the synchronous transmission of the time information and the calibrated corresponding time scale signal described in this article mainly means that the time information is sent within 1 second after the calibrated corresponding time scale signal is sent ;

A differential communication circuit 208, which exchanges differential signals with the timed device through cables.

In addition, in the integrated satellite time service machine shown in Figure 1, in order to avoid the time scale signal obtained by the time delay compensation circuit 207 and the microcontroller 205 from the positioning solution circuit 204, due to transmission through the microcontroller 205 bus error, the positioning solution circuit 204 can be further connected with the microcontroller 205 and the time delay compensation circuit 207 through the direct connection signal line, and send the time scale signal to the microcontroller 205 and the time delay compensation circuit 207 through the direct connection signal line .

Preferably, in the satellite time service integrated machine as shown in Figure 1, the microcontroller 205 can further control the sending and receiving state of the differential communication circuit 208, so that the differential communication circuit 208 can interact with the timed device through cables in a half-duplex manner Differential signals, so as to realize the multiplexing of cables.

In practical applications, in the integrated satellite time service machine shown in Figure 1, other parts except the antenna 202 can be carried in the same programmable logic chip, or two or so programmable logic chips, of course, it can also be Each part is realized by a programmable logic chip or corresponding physical circuit. In addition to multiple optional physical entity implementations, there are multiple optional specific logic circuit structures or physical circuit structures.

Hereinafter, specific structures of the measuring circuit and the differential communication circuit will be described in detail.

Fig. 3 is a specific structural diagram of the satellite timing service integrated machine in the embodiment of the utility model. In FIG. 3 , the measurement circuit 306 includes: a calibration sequence generator, a sending time observer, and a receiving time observer.

A calibration sequence generator, which generates a calibration sequence and sends it to the timed device through the differential communication circuit 308;

Sending time observer, which is connected with the calibration sequence generator through a direct signal line, is used to observe the local sending time of the calibration sequence generated by the calibration sequence generator, and send the local sending time to the time delay through the microcontroller 305 bus compensation circuit 307;

The receiving time observer is connected with the differential communication circuit through a direct signal line, and is used to observe the local receiving time of the calibration sequence fed back by the timing device feedback by the differential communication circuit 308, and send the local receiving time to the Delay compensation circuit 307.

The differential communication circuit 308 includes: a transmission selector, a half-duplex differential transceiver 1 , a transceiver controller 1 , a half-duplex differential transceiver 2 , and a transceiver controller 2 .

A transmission selector, which selects one of the calibration sequence generated by the calibration sequence generator and the time scale signal calibrated by the delay compensation circuit 307 to send to the half-duplex differential transceiver 1;

Half-duplex differential transceiver 1, which is connected to the calibration sequence generator, receiving time observer, and transceiver controller 1 through a direct connection signal line, and is used to transmit the channel selected by the transmission selector as a differential signal through a cable To the timed device, the calibration sequence received by the timed device fed back through the cable is also sent to the receiving time observer;

The transceiver controller 1 is connected to the microcontroller 305 bus to be controlled by the microcontroller 305, and according to the instructions of the microcontroller 305, when it is necessary to measure the cable, the CNT3 controls the transmission selector to select the calibration sequence to generate The calibration sequence generated by the device, and trigger the transmission time observer through CNT3, and control the transmission selector through CNT3 to select the time scale signal calibrated by the delay compensation circuit when calibration is required; and, according to the instructions of the microcontroller 305, control through CNT1 Transceiver status of half-duplex differential transceiver 1;

Half-duplex differential transceiver 2, which is connected with microcontroller 305 and transceiver controller 1 by a direct connection signal line, is used to receive by the notification of the timed equipment (that is, the opposite end transceiver notified by the timed equipment) through the cable The time of the calibration sequence) is sent to the microcontroller 305, and the announcement from the microcontroller 305 (that is, the time to receive the calibration sequence at the end notified to the timing device) is sent to the timing device in the form of a differential signal;

The transceiver controller 2 is connected to the microcontroller 305 bus to be controlled by the microcontroller 305 , and controls the transceiver status of the half-duplex differential transceiver 2 through the CNT2 according to the instructions of the microcontroller 305 .

In addition, in the case of using an 8-core cable, one power line, one ground line, and two differential signal lines of the half-duplex differential transceiver 1; one power line, one ground line, and two differential signal lines of the half-duplex differential transceiver 2. 1 ground wire, and 2 differential signal wires.

Fig. 4 is another specific structural diagram of the integrated satellite time service machine in the embodiment of the present invention. Compared with Fig. 3, the specific structure shown in Fig. 4 lies only in the control mode of the half-duplex differential transceiver 1, that is, in Fig. 4, the transceiver controller 1, according to the instructions of the microcontroller 305, needs to measure the cable The time delay controls the transmission selector through CNT3 to select the calibration sequence generated by the calibration sequence generator, and triggers the calibration sequence generator through CNT3.

Based on the above-mentioned principle description of the structure shown in Figure 1, and the above-mentioned specific structure shown in Figure 3 and Figure 4, those skilled in the art can deduce other structures of the satellite time service integrated machine and the improvement required by the time service equipment , this article will not repeat them one by one.

Moreover, for any specific circuit structure, the working principle of the satellite timing service integrated machine in this embodiment is the same. Next, the basic working principle of the satellite timing service integrated machine will be described in detail.

After the satellite timing service integrated machine is powered on and started, the whole machine needs to be initialized first. The specific initialization process includes:

Set the working mode of the positioning calculation circuit, for example, set to multi-mode joint navigation mode, or single-mode GPS single Beidou working mode;

Set the working mode of the differential communication circuit. For example, for the specific circuit structure shown in Figure 3 and Figure 4, the line 1 corresponding to the half-duplex differential transceiver 1 and the line 1 corresponding to the half-duplex differential transceiver 2 can be set. The line 2 of the line is "half-duplex" working mode, or set one of the two to "half-duplex" working mode and the other to "send-only" mode.

After the initialization, the integrated satellite timing machine can start to work normally, specifically including the measurement for delay calibration and the normal timing operation based on delay calibration.

Fig. 5 is an exemplary flow chart of the measurement process of the satellite timing service integrated machine in the embodiment of the present invention. As shown in Figure 5, the measurement for delay calibration includes the following steps:

Step 501, the satellite timing service integrated machine communicates the calibration sequence with the time-service device in the form of a differential signal through a cable, and observes the local time of sending the calibration sequence and the local reception time of the calibration sequence fed back by the time-service device.

In step 502, the integrated satellite time service unit notifies the time service equipment of the time of receiving the calibration sequence at the local end and receives the time of sending and receiving the calibration sequence of the peer terminal notified by the time service equipment in the form of a differential signal through the cable.

So far, the measurement process for delay calibration ends.

The above measurement process for delay calibration can also be regarded as a negotiation process of delay calibration between the satellite time service integrated machine and the time service equipment.

Fig. 6 is a sequence diagram of the interaction between the integrated satellite timing machine and the timed equipment in the measurement process in the embodiment of the present invention. As shown in Figure 6, taking the specific circuit structure shown in Figure 3 and Figure 4 as an example, assuming that the working modes of half-duplex differential transceiver 1 and half-duplex differential transceiver 2 are "half-duplex", Measurements for delay calibration include the following interactive processes:

Step 601 , the satellite time service integrated machine sets the transmitting and receiving states of the line 1 corresponding to the half-duplex differential transceiver 1 and the line 2 corresponding to the half-duplex differential transceiver 2 to be in the sending state.

In step 602, the timed device sets the sending and receiving states of line 1 and line 2 to be receiving states.

Step 603 , the satellite timing service integrated machine sends the calibration sequence to the timed device from line 1, and observes the time when the local terminal sends the calibration sequence.

Step 604, after the satellite time service integrated machine completes the transmission and calibration sequence, set the transmitting and receiving state of line 1 and line 2 as receiving state.

Step 605, the timed device detects the calibration sequence from the opposite end, and observes the local time when the timed device receives the calibration sequence.

Step 606, after the time service device detects the calibration sequence, set the sending and receiving state of line 1 and line 2 to the sending state.

Step 607, the time service equipment sends the calibration sequence to the satellite time service integrated machine from the line 1.

Step 608, after the timed device completes sending, set the sending and receiving state of line 1 to the receiving state.

Step 609, the satellite timing service integrated machine detects the calibration sequence from the opposite end.

Step 610, after the satellite timing service integrated machine detects the calibration sequence from the opposite end, it sets the transmitting and receiving state of line 1 to the sending state.

In step 611, the timed device notifies the local receiving time of the calibration sequence observed by itself to the satellite time service integrated machine from line 2.

Step 612 , the time-serviced device notifies the local sending time of the calibration sequence sent by the local end to the satellite time service integrated machine through the line 2 .

Step 613, after the timed device completes sending, set the sending and receiving status of line 2 to the receiving status.

In step 614, the integrated satellite time service unit sets the transmitting and receiving state of line 2 as the sending state.

Step 615 , the satellite time service integrated machine notifies the local receiving time of the calibration sequence fed back by the time service equipment at the local terminal to the time service equipment through line 2 .

Step 616, the satellite time service integrated machine performs calibration compensation according to the time when the local end transmits and receives the calibration sequence and the time when the peer end transmits and receives the calibration sequence notified by the time service device, and the time service device performs calibration compensation according to the time when the local end transmits and receives the calibration sequence.

Optionally thereafter, the integrated satellite time service unit can also send a test end message to the timed device.

So far, this process ends.

After the above process, the satellite time service integrated machine can be in the normal time service mode, and use the compensated time scale signal to perform time service to the time service equipment, so that the output time scale signal reaches the time scale of the input port of the time service equipment and aligns with the satellite time source , to achieve high-precision timing.

Fig. 7 is an exemplary flow chart of the timing process of the integrated satellite timing machine in the embodiment of the present invention. As shown in Figure 5, the normal timing operation based on delay calibration includes the following steps of cyclic execution:

Step 701, receiving satellite signals;

Step 702, filtering the received satellite signal;

Step 703, perform positioning calculation on the filtered satellite signal, and obtain time scale signal and time information;

Step 704: Calibrate the time scale signal obtained from the positioning solution according to the time when the local end transmits and receives the calibration sequence and the time when the peer end transmits and receives the calibration sequence notified by the timing device, and transmits the calibrated time scale signal as The differential signal is sent to the timed device;

In step 705, the calibrated time information corresponding to the time scale signal is also synchronously sent to the timed device in the form of a differential signal through the cable.

The synchronization in this step means that the time information is sent within one second after the calibrated corresponding time scale signal is sent.

So far, this process ends.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. satellite time service all-in-one comprises:

Antenna, its receiving satellite signal;

Filtering circuit, it carries out filter circuit for filtering to the satellite-signal that antenna receives;

The positioning calculation circuit, it positions filtered satellite-signal and resolves and obtain timing signal and temporal information, and the timing signal that obtains is sent to delay compensation circuit and microcontroller;

It is characterized in that, also comprise: microcontroller, metering circuit, delay compensation circuit, Differencing communication circuit, wherein:

Metering circuit, its by the Differencing communication circuit with by the mutual calibrating sequence of time service equipment, and observation sends the local terminal time of calibrating sequence and the local terminal time of reception of the calibrating sequence that fed back by time service equipment;

The delay compensation circuit, it is according to the time of metering circuit transmitting-receiving calibrating sequence and by the time of time service equipment transmitting-receiving calibrating sequence, the timing signal that the positioning calculation circuit obtains is calibrated, and the timing signal after will calibrating is sent to by time service equipment by the Differencing communication circuit;

Microcontroller, the timing signal that it obtains according to the positioning calculation circuit, the corresponding temporal information that the positioning calculation circuit is obtained by the Differencing communication circuit be sent to by time service equipment and make this temporal information and calibration after corresponding timing signal synchronized transmission, also by the Differencing communication circuit to the time that is received calibrating sequence by time service devices advertise metering circuit, and receive by the time of the opposite end of time service devices advertise transmitting-receiving calibrating sequence;

The Differencing communication circuit, it is by cable and by the mutual differential signal of time service equipment.

2. satellite time service all-in-one as claimed in claim 1 is characterized in that microcontroller is further controlled the reiving/transmitting state of Differencing communication circuit, make the Differencing communication circuit with half-duplex mode by cable with by the mutual differential signal of time service equipment.

3. satellite time service all-in-one as claimed in claim 1, it is characterized in that, positioning calculation circuit, metering circuit, delay compensation circuit, Differencing communication circuit are mounted on the microcontroller bus, and the positioning calculation circuit further links to each other with the delay compensation circuit with microcontroller respectively by direct-connected signal wire and by direct-connected signal wire timing signal is sent to microcontroller and delay compensation circuit.

4. satellite time service all-in-one as claimed in claim 3 is characterized in that metering circuit comprises:

The calibrating sequence generator, it produces calibrating sequence and is sent to by time service equipment by the Differencing communication circuit;

The transmitting time observer, the local terminal transmitting time of the calibrating sequence that its observation calibrating sequence generator is produced also is sent to the delay compensation circuit by the microcontroller bus;

The time of reception observer, it receives calibrating sequence that is fed back by time service equipment and the local terminal time of reception of observing this calibrating sequence by the Differencing communication circuit, is sent to the delay compensation circuit by the microcontroller bus then.

5. satellite time service all-in-one as claimed in claim 4 is characterized in that, calibrating sequence generator and transmitting time observer by direct-connected signal wire link to each other, the time of reception observer links to each other by direct-connected signal wire with the Differencing communication circuit.

6. as claim 4 or 5 described satellite time service all-in-ones, it is characterized in that the Differencing communication circuit comprises:

Send selector switch, riches all the way in calibrating sequence that its selection calibrating sequence generator produces and the timing signal after the calibration of delay compensation circuit delivers to the first half-duplex difference transceiver;

The first half-duplex difference transceiver, it will send selector switch selected a tunnel by cable and be sent to by time service equipment in the mode of differential signal, also will be sent to the time of reception observer by the calibrating sequence that is fed back by time service equipment that cable receives;

First transceiver controller, it is mounted on the microcontroller bus, to be controlled by microcontroller, and control sends calibrating sequence that selector switch selects the calibrating sequence generator to produce, control sends selector switch and selects timing signal after the delay compensation circuit is calibrated when needs calibrates when needs are measured the cable time delay, and, control the reiving/transmitting state of the first half-duplex difference transceiver;

The second half-duplex difference transceiver, it will be sent to microcontroller by the aforementioned announcement by time service equipment that cable receives, and also will be sent to by time service equipment from the aforementioned announcement of the microcontroller mode with differential signal;

Second transceiver controller, it is mounted on the microcontroller bus, being controlled by microcontroller, and controls the reiving/transmitting state of the second half-duplex difference transceiver.

7. satellite time service all-in-one as claimed in claim 6 is characterized in that described cable comprises:

1 power lead of the first half-duplex difference transceiver, 1 ground wire and 2 differential signal lines;

1 power lead of the second half-duplex difference transceiver, 1 ground wire and 2 differential signal lines.

8. satellite time service all-in-one as claimed in claim 6 is characterized in that, first transceiver controller is time-delay triggering calibrating sequence generator or triggering transmitting time observer when needs are measured cable further.

9. as each described satellite time service all-in-one in the claim 1 to 3, it is characterized in that antenna is that multimode antenna, positioning calculation circuit are multimode positioning calculation circuit.

10. as each described satellite time service all-in-one in the claim 1 to 3, it is characterized in that, send in one second after the corresponding timing signal of temporal information after calibration sends, with the corresponding timing signal synchronized transmission after guaranteeing this temporal information and calibrating.

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