CN211086636U - Low-power consumption microwave sensor and control circuit thereof - Google Patents

Abstract

The utility model discloses a microwave sensor with low power consumption and a control circuit thereof, comprising a microwave module, a control module and a voltage regulator module, wherein the control module comprises a first control chip U1, and the voltage regulator module comprises a second control chip U2 , the pin 5 of the first control chip U1 is connected with the pin 3 of the second control chip U2, and the pin 5 of the second control chip U2 is connected with the microwave module; the low power consumption microwave sensor provided by the utility model The control circuit of the first control chip U1 controls the second control chip U2 through the intermittent signal output of the first control chip U1, so as to control the microwave module to emit signals intermittently, that is, the intermittent operation of the microwave sensor is realized, the working loss of the microwave sensor is reduced, and the Energy saving effect.

Description

A low-power microwave sensor and its control circuit

technical field

The utility model relates to the technical field of microwave sensors, in particular to a microwave sensor with low power consumption and a control circuit thereof.

Background technique

Microwave sensors use the principle of microwave Doppler to detect and output sensing signals, and are widely used in the detection of moving human objects, moving vehicles, liquid and gas flow and other fields.

The microwave sensor is a current-type device, and the normal working current is above 50mA. The control current required by the current battery power supply is too large, that is, the current microwave sensor has the problem of high operating loss.

It can be seen that the existing technology still needs to be improved and improved.

Utility model content

In view of the shortcomings of the above-mentioned prior art, the purpose of this utility model is to provide a low-power microwave sensor and its control circuit, the control circuit controls the microwave sensor to work intermittently, can reduce the loss of the microwave sensor during operation, and achieve energy-saving Effect.

In order to achieve the above object, the utility model has adopted the following technical solutions:

A control circuit of a low-power microwave sensor includes a microwave module, a control module and a voltage stabilization module, the control module includes a first control chip U1, the voltage stabilization module includes a second control chip U2, and the first control chip U2. The pin 5 of a control chip U1 is connected to the pin 3 of the second control chip U2, and the pin 5 of the second control chip U2 is connected to the microwave module.

In the control circuit of the low-power microwave sensor, the voltage stabilization module further includes a current limiting unit, an input voltage stabilization unit and an output voltage stabilization unit, and one end of the current limiting unit is connected to the pin of the first control chip U1. 5 is connected, the other end of the current limiting unit is connected with the pin 3 of the second control chip U2, one end of the input voltage stabilization unit is grounded, and the other end of the input voltage stabilization unit is connected with the pin 1 of the second control chip U2, One end of the output voltage stabilization unit is grounded, and the other end of the output voltage stabilization unit is connected to the pin 5 of the second control chip U2; the pin 1 of the second control chip U2 is connected to the external power supply VCC, and the second control chip Pin 2 of U2 is grounded, and pin 4 of the second control chip U2 is empty.

In the control circuit of the low-power microwave sensor, the current limiting unit includes a first resistor R1, one end of the first resistor R1 is connected to the pin 5 of the first control chip U1, and the other end of the first resistor R1 is connected to the pin 5 of the first control chip U1. One end is connected to pin 3 of the second control chip U2.

In the control circuit of the low-power microwave sensor, the input voltage stabilization unit includes a first capacitor C1, one end of the first capacitor C1 is grounded, and the other end of the first capacitor C1 is connected to the lead of the second control chip U2. Pin 1 is connected.

In the control circuit of the low-power microwave sensor, the output voltage stabilization unit includes a second capacitor C2, one end of the second capacitor C2 is connected to the pin 5 of the second control chip U2, and the second capacitor C2 is connected to the pin 5 of the second control chip U2. The other end is grounded.

The utility model also provides a low-power microwave sensor correspondingly, which includes a housing and an upper cover arranged on the top of the housing, the housing is provided with a control board, and the control board is provided with the above-mentioned low-power microwave Sensor control circuit.

Beneficial effects:

The utility model provides a microwave sensor with low power consumption and a control circuit thereof. The control circuit of the microwave sensor with low power consumption controls the signal output of the second control chip U2 through the intermittent signal output of the first control chip U1, so as to control the signal output of the second control chip U2. The microwave module emits signals intermittently, that is, the intermittent work of the microwave sensor is realized, the work loss of the microwave sensor is reduced, and the effect of energy saving is achieved.

Description of drawings

1 is a schematic structural diagram of a control circuit of a low-power microwave sensor provided by the utility model;

Fig. 2 is the circuit structure diagram of the control circuit of the low-power microwave sensor provided by the utility model;

FIG. 3 is a schematic structural diagram of a low-power microblog sensor provided by the present invention.

Description of main component symbols: 1-shell, 2-upper cover.

Detailed ways

The utility model provides a low power consumption microwave sensor and a control circuit thereof. In order to make the purpose, technical scheme and effect of the utility model clearer and clearer, the utility model is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. Understand the specific meanings of the above terms in the present invention.

Please refer to FIG. 1 and FIG. 2 , the present invention provides a control circuit of a microwave sensor with low power consumption, including a microwave module, a control module and a voltage regulator module, the control module includes a first control chip U1, the The voltage stabilization module includes a second control chip U2, the pin 5 of the first control chip U1 is connected with the pin 3 of the second control chip U2, and the pin 5 of the second control chip U2 is connected with the microwave module; In this embodiment, the model of the first control chip U1 may be, but not limited to, PIC12F615, and the model of the second control chip U2 may be, but not limited to, ME6211C.

The working principle of the control circuit of the low-power microwave sensor provided by the present invention is as follows:

The pin 3 of the second control chip U2 is the enable pin, the pin 5 of the second control chip U2 is the output pin, the pin 5 of the second control chip U2 is connected to the microwave module, and the pin 5 of the first control chip U1 Connect to pin 3 of the second control chip U2; assuming that 1 is a high level and 0 is a low level, when the output of pin 5 of the first control chip U1 is 1, the pin 5 of the second control chip U2 has Signal output, the microwave module starts to work, when the output of pin 5 of the first control chip U1 is 0, the pin 5 of the second control chip U2 has no signal output, and the microwave module stops working, thereby realizing the control of the power supply of the microwave module. ;By adjusting the cycle ratio of high and low level output, for example, assuming that a working cycle is 0.6 seconds, the output time of controlling high level is 0.1 seconds, and the output time of controlling low level is 0.5 seconds, so as to realize intermittent emission of microwave sensors Signal, that is, the intermittent operation of the microwave sensor is realized, the loss of the microwave sensor during operation is greatly reduced, and the effect of energy saving is achieved.

Further, please refer to FIG. 1, the voltage stabilization module further includes a current limiting unit, an input voltage stabilization unit and an output voltage stabilization unit, and one end of the current limiting unit is connected to the pin 5 of the first control chip U1, and the current limiting unit is The other end of the unit is connected to pin 3 of the second control chip U2, one end of the input voltage stabilization unit is grounded, and the other end of the input voltage stabilization unit is connected to pin 1 of the second control chip U2, and the output voltage stabilization unit is connected to pin 1 of the second control chip U2. One end of the unit is grounded, and the other end of the output voltage stabilization unit is connected to pin 5 of the second control chip U2; the pin 1 of the second control chip U2 is connected to the external power supply VCC, and the pin 2 of the second control chip U2 Ground, pin 4 of the second control chip U2 is empty.

Further, please refer to FIG. 2, the current limiting unit includes a first resistor R1, one end of the first resistor R1 is connected to the pin 5 of the first control chip U1, and the other end of the first resistor R1 is connected to the second control chip U1. The pin 3 of the chip U2 is connected; the first resistor R1 acts as a current limiter.

Further, please refer to FIG. 2, the input voltage stabilization unit includes a first capacitor C1, one end of the first capacitor C1 is grounded, and the other end of the first capacitor C1 is connected to the pin 1 of the second control chip U2; The first capacitor C1 functions as a filter and voltage regulator.

Further, please refer to FIG. 2, the output voltage stabilization unit includes a second capacitor C2, one end of the second capacitor C2 is connected to the pin 5 of the second control chip U2, and the other end of the second capacitor C2 is grounded; The second capacitor C2 acts as a filter and voltage regulator.

Referring to FIG. 3 , the present invention also provides a low-power microwave sensor, which includes a casing 1 and an upper cover 2 disposed on the top of the casing 1 . The casing 1 is provided with a control board, which controls the The control circuit of the above-mentioned low-power microwave sensor is provided on the board; in this embodiment, the housing 1 and the upper cover 2 can be but not limited to a welding connection.

It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions of the present invention and its utility model concept, and all these changes or replacements should belong to the protection scope of the present invention.

Claims (6)

1. a control circuit of a low-power microwave sensor, comprising a microwave module, is characterized in that, also comprises a control module and a voltage regulator module, the control module comprises a first control chip U1, and the voltage regulator module comprises a second control Chip U2, the pin 5 of the first control chip U1 is connected to the pin 3 of the second control chip U2, and the pin 5 of the second control chip U2 is connected to the microwave module. 2. The control circuit of a low-power microwave sensor according to claim 1, wherein the voltage stabilization module further comprises a current limiting unit, an input voltage stabilization unit and an output voltage stabilization unit, and the current limiting unit One end is connected to pin 5 of the first control chip U1, the other end of the current limiting unit is connected to pin 3 of the second control chip U2, one end of the input voltage stabilization unit is grounded, and the other end of the input voltage stabilization unit is connected to the pin 3 of the second control chip U2. The pin 1 of the second control chip U2 is connected, one end of the output voltage stabilization unit is grounded, and the other end of the output voltage stabilization unit is connected to the pin 5 of the second control chip U2; the pin of the second control chip U2 1 is connected to the external power supply VCC, the pin 2 of the second control chip U2 is grounded, and the pin 4 of the second control chip U2 is empty. 3 . The control circuit of a low-power microwave sensor according to claim 2 , wherein the current limiting unit comprises a first resistor R1 , and one end of the first resistor R1 is connected to the first control chip U1 . 4 . The pin 5 is connected, and the other end of the first resistor R1 is connected with the pin 3 of the second control chip U2. 4 . The control circuit of a microwave sensor with low power consumption according to claim 2 , wherein the input voltage stabilization unit comprises a first capacitor C1 , one end of the first capacitor C1 is grounded, and the first capacitor C1 The other end is connected to pin 1 of the second control chip U2. 5 . The control circuit of a low-power microwave sensor according to claim 2 , wherein the output voltage stabilization unit comprises a second capacitor C2 , and one end of the second capacitor C2 is connected to the second control chip U2 . 6 . The pin 5 is connected, and the other end of the second capacitor C2 is grounded. 6. A microwave sensor with low power consumption, characterized in that it comprises a casing and an upper cover arranged on the top of the casing, a control board is arranged in the casing, and a control board is arranged on the control board according to any one of claims 1-5. The control circuit of the low-power microwave sensor described in item.

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