CN109510536B - Generator speed-up signal digital conversion device - Google Patents

Abstract

The invention discloses a generator speed-up signal digital conversion device, which includes a power supply, an instrument single control line access port and an engine input port, the engine input port includes a speed-up port and an exit speed-up port, and the circuit of the generator speed-up signal digital conversion device Including: PLC controller, the input terminal of the PLC controller is connected to the access port of the single control line of the instrument, the PLC controller includes a first output port and a second output port, and the first output port and the second output port can be pulled down Control; the first relay and the second relay are respectively connected to the first output port and the second output port; the control contact of the first relay and the control contact of the second relay, the control contact of the first relay and the speed-up port connected, the second relay control contact is connected to the exit speed-up port; and the manual switch, its input terminal is connected to the control contact of the second relay, and the output terminal of the manual switch is connected to the control contact of the first relay.

Description

Generator speed-up signal digital conversion device

technical field

The invention relates to the technical field of generators, in particular to a digital conversion device for a speed-up signal of a generator.

Background technique

The generator set is generally composed of three parts: the engine, the generator and the instrument. The running state of the engine is output by the instrument after judging the current conditions (signal). For example, after the engine is started, the idle speed is warmed up first. When the water temperature reaches the set value, the instrument gives the engine an instruction to rise from idle speed to rated speed. (hereinafter referred to as "speed up" command, returning from rated speed to idle speed is called "exit speed up" command), the engine executes the speed up command according to the signal of the instrument and enters the power generation preparation state. However, since the engine and the instrument are provided by different manufacturers, problems such as inconsistent control methods and signal types between the two parts, and mismatch between output and demand are often encountered during the matching process. For example, the engine needs a pulse signal and the instrument What can be provided are high and low level signals, and for another example, some engines need to separate two port inputs for the speed up and speed out, while the instrument has only one signal output port and so on. Need to increase a lot of cost and manpower to change the signal of the instrument.

At present, the mainstream control instruments on the market control the engine's rated speed. The signal is basically a single output high and low level signal, that is, when the condition is met, a high level is output and maintained, and when it needs to exit (such as stop) it becomes low. level, its control logic is shown in Figure 1.

At present, the engine electronic control systems on the market can be divided into the following speed-up signal demand types according to different systems:

1. Single input: high level (speed up); low level (exit speed up)

Control logic: The engine ECU speed-up control signal has only one input, that is, single-input control. When the input control port gets a high level, the engine thinks that the speed-up command has been obtained, and when the engine detects that the port level changes from high to low, it exits the speed-up command. The first is the most common control method. Figure 2 is a logic diagram of single input high and low level control.

2. Single input: pulse (speed up); pulse (exit speed up)

Control logic: When the speed-up control input port detects a rising edge of a pulse, the engine executes the speed-up action, and when the engine receives a pulse rising edge again, it quits the speed-up command. Figure 3 is a single input: single input pulse speed up, pulse exit speed up control logic diagram.

3. Double input (speed-up port + exit port)

a) Speed up: the engine speeds up when the speed up port detects a pulse signal

b) Exit speed-up: Exit port detects a pulse signal to exit speed-up command

Control logic: In this way, the engine ECU has two receiving command ports, which are the speed-up input port and the exit port. When the engine speed-up input port detects a rising edge of a pulse, the engine executes the speed-up action, and when the engine exit port receives a Exit acceleration when the pulse rises. Fig. 4 is a control logic diagram of double input (speed-up port + exit port).

Therefore, the single signal type (as shown in Figure 1) designed according to the current mainstream instrumentation in the market basically cannot meet the engine control requirements. In this case, the following methods are generally used to solve the problem:

(1) Cooperate with the instrument factory and the engine manufacturer to unify the signal types. The advantage of this solution is that it can transfer the change cost to the instrument factory and the engine factory for special development and stable control. The disadvantage of this solution is that the specifications of the instrument factory may be different from those of the engine factory. For example, for the instrument factory, 80% of customers may use the first mode. In addition, the number of ports of the instrument is limited, and if it is to be expanded, the module needs to be replaced or targeted development. For engine manufacturers, due to the different focus of the application sector (mainly for the vehicle sector and a relatively small proportion of power generation), 90% of their customers use the second mode, so neither side will make it easy for customers with small sales To change your original state.

(2) Capable unit manufacturers convert the original signal by adding hardware. For example, adding such modification methods as delay relays and buttons. The advantage of this scheme is that it does not need to be modified by the instrument factory and the engine factory, and the control function can basically be realized. The disadvantage of this solution is that it is costly and unstable, and the refitter needs to have strong skills, which changes the user's usage habits, and it will make future maintenance difficult due to the change of the original control circuit of the instrument.

Therefore, the present invention can carry out digital conversion and packaging of ordinary instrument control signal types, and can realize the unification of "demand" and "demand" signals for both sides without changing the signals (usage habits) on both sides, so as to achieve stable control Purpose.

The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art.

Contents of the invention

The purpose of the present invention is to provide a generator speed-up signal digital conversion device, which can be operated conveniently and controlled stably, and can satisfy various control types of engine speed-up signals.

In order to achieve the above object, the present invention provides a generator speed-up signal digital conversion device. The generator speed-up signal digital conversion device includes a power supply, an instrument single control line access port and an engine input port. The instrument single control line access port passes through The instrument output line is connected with the instrument, the engine input port includes a speed-up port and an exit speed-up port, and the circuit of the generator speed-up signal digital conversion device includes: PLC controller, the input end of the PLC controller is connected to the single-control line access port of the meter connection, the PLC controller includes a first output port and a second output port, the first output port and the second output port can be pulled low; the first relay and the second relay are respectively connected to the first output port and the second output port The ports are connected so that the output of the first output port and the second output port are respectively converted by the first relay and the second relay; the control contact of the first relay and the control contact of the second relay, the first relay The control contact is connected to the speed-up port, the second relay control contact is connected to the exit speed-up port; and a manual switch, the input end of the manual switch is connected to the control contact of the second relay, and the output end of the manual switch is connected to the first The control contacts of the relay are connected.

In a preferred embodiment, the circuit of the generator speed-up signal digital conversion device further includes: a diode, the input end of the diode is connected to the output end of the manual switch, the output end of the diode is connected to the control contact of the first relay, And the first relay includes a first coil, and the second relay includes a second coil.

In a preferred embodiment, the speed-up port is connected to the engine speed-up input port, and the exit speed-up port is connected to the engine exit speed-up port.

In a preferred embodiment, when the digital conversion device for the speed-up signal of the generator is set to the manual switch closed and the engine is only connected to the single-input control of the speed-up port, when the instrument single-control line access port receives a high level rise edge, the first output port is pulled low for a period of time, the first coil is energized, the control contact of the first relay is connected for a period of time, and a pulse signal with a pulse width of a period of time is generated at the speed-up port.

In a preferred implementation, when the instrument single control line access port detects the falling edge of the instrument signal from high level to low level, the second output port is pulled down for a period of time, the second coil is energized, and the second The control contact of the relay is connected for a period of time, and the high level is generated by the manual switch through the diode on the speed-up port to generate a pulse signal with a pulse width of a period of time.

In a preferred embodiment, a period of time is greater than or equal to 2 seconds.

In a preferred embodiment, when the generator speed-up signal digital conversion device is set to the manual switch to open, the speed-up port is connected to the engine speed-up input port, and the exit speed-up port is connected to the engine exit speed-up port, when the instrument single control line access port receives When the rising edge of the high level comes from the instrument, the first output port is pulled down for a period of time, the first coil is energized, the control contact of the first relay is connected for a period of time, and a pulse width of a period of time is generated at the speed-up port. Pulse signal to trigger engine speed up.

In a preferred implementation, when the instrument single control line access port detects the falling edge of the instrument signal from high level to low level, the second output port is pulled down for a period of time, the second coil is energized, and the second The control contact of the relay is connected for a period of time, and a pulse signal with a pulse width of a period of time is generated on the exit speed-up port to trigger the engine to exit the speed-up.

In a preferred embodiment, a period of time is greater than or equal to 2 seconds.

Compared with the prior art, the generator speed-up signal digital conversion device according to the present invention has the following advantages: the present invention uses signal differentiation means, and uses the differential program to capture the rising edge and the rising edge of the traditional high and low level control signal at the moment of change The falling edge is used as the starting point, and a corresponding pulse is generated through the delay program to meet the control requirements, so that the speed-up signal digital conversion device of the present invention can carry out digital conversion and packaging of common instrument control signal types, and can realize without changing the signals on both sides (using In the case of habit), the two parties can get the unity of "need" and "seek" signals, so as to achieve the purpose of stable control. The generator speed increase signal digital conversion device of the present invention has low manufacturing cost, good stability, small size, light weight, convenient installation and arrangement, and the user only needs to connect the corresponding input and output lines, which is convenient and quick to use, and can meet all current engine speed increases Signal control type. Moreover, due to the use of a separate conversion kit, there is no need to change the circuit of the original instrument and the engine, and there is no influence on future maintenance.

Description of drawings

Figure 1 is a general instrument signal and engine state control logic diagram.

Figure 2 is a logic diagram of single input high and low level control.

Fig. 3 is a control logic diagram of a single input pulse (speed increase) pulse (exit speed increase).

Fig. 4 is a control logic diagram of double input (speed-up port + exit port).

Fig. 5 is a schematic circuit diagram of a speed increasing signal digital conversion device according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the signal conversion process of the speed-up signal digital conversion device according to an embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

As shown in Fig. 5 to Fig. 6, the generator speed-up signal digital conversion device according to the preferred embodiment of the present invention includes a power supply, an instrument single control line access port P ₀ and an engine input port, and the instrument single control line access port P ₀ passes through The instrument output line is connected to the instrument 510, the engine input port includes a speed-up port _P1 and an exit speed-up port _P2 , and the circuit of the generator speed-up signal digital conversion device includes: a PLC controller 501, a first relay 502, and a second relay 503 , the control contact 504 of the first relay, the control contact 505 of the second relay and the manual switch 506 . Wherein, the input terminal X ₀ of the PLC controller 501 is connected with the instrument single control line access port P ₀ , the PLC controller 501 includes a first output port Y ₁ and a second output port Y ₂ , the first output port Y 1 and the second output port Y ₂ The second output port _Y2 can be controlled to be pulled low according to the required logic. The first relay 502 and the second relay 503 are respectively connected with the first output port _Y1 and the second output port _Y2 , so that the outputs of the first output port _Y1 and the second output port _Y2 are respectively controlled by the first relay 502 and the second relay 503 for level conversion. The first relay control contact 504 is connected to the speed-up port _P1 , and the second relay control contact 505 is connected to the exit speed-up port _P2 . The input end of the manual switch 506 is connected to the control contact 505 of the second relay, and the output end of the manual switch 506 is connected to the control contact 504 of the first relay.

In the above scheme, the circuit of the generator speed-up signal digital conversion device further includes: a diode 507, the input end of the diode 507 is connected with the output end of the manual switch 506, and the output end of the diode 507 is connected with the control contact 504 of the first relay , and the first relay 502 includes a first coil K ₁ , and the second relay 503 includes a second coil K ₂ .

In a preferred embodiment, the speed-up port P ₁ is connected to the engine speed-up input port 511 , and the exit speed-up port P ₂ is connected to the engine exit speed-up port 512 .

In a preferred embodiment, when the generator speed-up signal digital conversion device is set so that the manual switch 506 is closed, and the engine is only connected to the speed-up port P ₁ for single-input control, when the meter single-control line access port P ₀ receives a signal from the meter When the high level of 510 rises, the first output port Y ₁ is pulled down for a period of time (for example, a period of time can be greater than or equal to 2 seconds), the first coil K ₁ is energized, and the control contact 504 of the first relay is connected. Pass a period of time, and generate a pulse signal with a pulse width of a period of time at the speed-up port _P1 .

In a preferred implementation, when the instrument single control line access port P ₀ detects the falling edge of the instrument signal from high level to low level, the second output port Y ₂ is pulled low for a period of time, and the second coil K ₂ is energized, the control contact 505 of the second relay is connected for a period of time, and the manual switch 506 generates a pulse signal with a pulse width of a period of time on the speed-up port P ₁ through the diode 507 at a high level.

In a preferred embodiment, when the generator speed-up signal digital conversion device is set such that the manual switch 506 is turned on, the speed-up port P ₁ is connected to the engine speed-up input port 511, and the exit speed-up port P ₂ is connected to the engine exit speed-up port 512, when the meter When the single control line access port P ₀ receives a high-level rising edge from the meter 510, the first output port Y ₁ is pulled down for a period of time, the first coil K ₁ is energized, and the control contact 504 of the first relay is turned on A period of time, and a pulse signal with a pulse width of a period of time is generated at the speed-up port _P1 to trigger the engine to speed up.

In a preferred embodiment, when the instrument single control line access port P ₀ detects the falling edge of the instrument 510 signal from high level to low level, the second output port Y ₂ is pulled low for a period of time, and the second Coil _K2 is energized, the control contact 505 of the second relay is connected for a period of time, and a pulse signal with a pulse width of a period of time is generated on the exit speed-up port _P2 to trigger the engine to exit the speed-up.

In a preferred embodiment, a period of time is greater than or equal to 2 seconds.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to make and use various exemplary embodiments of the invention, as well as various Choose and change. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (7)

1. The utility model provides a generator speed-up signal digital conversion device, this generator speed-up signal digital conversion device includes power, instrument list accuse line access port and engine input port, instrument list accuse line access port is connected with the instrument through the instrument output line, its characterized in that, engine input port includes speed-up port and withdraws from the speed-up port, and generator speed-up signal digital conversion device's circuit includes:

the input end of the PLC is connected with the instrument single-control line access port, the PLC comprises a first output port and a second output port, and the first output port and the second output port can be controlled to be pulled down;

a first relay and a second relay connected to the first output port and the second output port, respectively, such that outputs of the first output port and the second output port are level-converted by the first relay and the second relay, respectively;

a control contact of a first relay and a control contact of a second relay, wherein the first relay control contact is connected with the speed increasing port, and the second relay control contact is connected with the exit speed increasing port; and

the input end of the manual switch is connected with the control contact of the second relay, and the output end of the manual switch is connected with the control contact of the first relay;

the circuit of the generator speed-up signal digital conversion device further comprises: the input end of the diode is connected with the output end of the manual switch, the output end of the diode is connected with the control contact of the first relay, the first relay comprises a first coil, and the second relay comprises a second coil;

the speed increasing port is connected with the speed increasing input port of the engine, and the exit speed increasing port is connected with the exit speed increasing port of the engine.

2. The generator speed-up signal digital conversion device according to claim 1, wherein when the generator speed-up signal digital conversion device is set to the manual switch to be closed, an engine is controlled by only a speed-up port single input, when the meter single control line access port receives a high level rising edge from the meter, the first output port is pulled down for a period of time, the first coil is energized, a control contact of the first relay is turned on for a period of time, and a pulse signal of a period of time pulse width is generated at the speed-up port.

3. The generator speed-up signal digital conversion apparatus according to claim 2, wherein when the meter signal is detected by the meter single-control line access port as a falling edge of a high level to a low level, the second output port is pulled down for a period of time, the second coil is energized, the control contact of the second relay is turned on for the period of time, and a high level is generated by the manual switch on the speed-up port through the diode as a pulse signal of a pulse width of the period of time.

4. A generator speed-up signal digital conversion apparatus according to claim 3, wherein the one period of time is 2 seconds or more.

5. The generator speed up signal digital conversion device according to claim 1, wherein when the generator speed up signal digital conversion device is set to the manual switch being turned on, the speed up port is connected to an engine speed up input port, the exit speed up port is connected to an engine exit speed up port, when the meter single control line access port receives a high level rising edge from the meter, the first output port is pulled down for a period of time, the first coil is energized, a control contact of the first relay is turned on for a period of time, and a pulse signal of a period of pulse width is generated at the speed up port to trigger the engine speed up.

6. The generator speed-up signal digital conversion apparatus according to claim 5, wherein when said meter single control line access port detects a falling edge of a meter signal from a high level to a low level, said second output port is pulled down for a period of time, said second coil is energized, a control contact of said second relay is turned on for said period of time, and a pulse signal of a pulse width of said period of time is generated on said exit speed-up port to trigger the engine to exit speed-up.

7. The generator speed-up signal digital conversion device according to claim 6, wherein the one period of time is 2 seconds or more.