Temperature control circuit system of field domain temperature measuring equipment

Abstract

The utility model discloses a temperature control circuit system of field domain temperature measuring equipment. The temperature control circuit system comprises a power supply module, a controller, a temperature controller, a white light camera module, a red light camera module and an on-off switch circuit, the controller is in two-way transmission connection with the red light camera module and the white light camera module, and the controller is in two-way transmission connection with the temperature controller; the power module is electrically connected with the red light camera module and the white light camera module through the on-off switch circuit, and the temperature controller and the controller jointly control the on-off switch circuit to be switched on and switched off. And meanwhile, the controller and the temperature controller jointly control the on-off of the on-off switch circuit, so that the whole circuit is timely protected from damaging field temperature measuring equipment due to over-high temperature and circuit faults.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control circuit technical field especially relates to a temperature control circuit system of field temperature measurement equipment. BACKGROUND

[0002] Field temperature measurement equipment is mainly used for temperature measurement of power grid structure or power equipment structure, adopts infrared light and white light camera to measure temperature, because its overall structure is small, its internal circuit structure is compact, when field temperature measurement equipment works, high temperature is produced, because the inside space is narrow, temperature diffusion is slow, a large amount of heat is accumulated in the inside of field temperature measurement equipment, and long time high temperature can damage the circuit and components in field temperature measurement equipment. SUMMARY

[0003] The utility model discloses a temperature control circuit system of field temperature measurement equipment, and through the controller and temperature control, the on-off switch circuit is controlled to be turned on and turned off, and the whole circuit is protected from being damaged by high temperature and circuit failure.

[0004] Technical scheme: in order to realize the above-mentioned purpose, a temperature control circuit system of field temperature measurement equipment of the utility model, including power module, controller, temperature controller, white light camera module, red light camera module and on-off switch circuit, the controller is connected with red light camera module and white light camera module bidirectionally, the controller is connected with temperature controller bidirectionally, the power module is connected with red light camera module and white light camera module respectively through on-off switch circuit, and the temperature controller and controller control the on-off switch circuit to be turned on and turned off.

[0005] Further, the temperature controller includes a single-chip microcomputer, an AT driver, a fan module and a temperature detection circuit, the collection end of the single-chip microcomputer is electrically connected with the output end of the temperature detection circuit, the control end of the single-chip microcomputer is connected with the input end of the AT driver, the output end of the AT driver is electrically connected with the input end of the fan module, and the detection end of the single-chip microcomputer detects the rotating speed of the fan module.

[0006] Further, the temperature detection circuit includes a temperature sensor and an R1 resistor, the DQ end of the temperature sensor is electrically connected with the PB2 end of the single-chip microcomputer, and the DQ end of the temperature sensor is electrically connected with the voltage power supply through the R1 resistor.

[0007] Further, the on-off switch circuit comprises a NAND circuit and a transistor switch; one input end of the NAND circuit is electrically connected with the signal output end of the controller, and the other input end of the NAND circuit is electrically connected with the signal output end of the temperature controller; the output end of the NAND circuit is electrically connected with the gate of the transistor switch; the source of the transistor switch is electrically connected with the output end of the power module, and the drain of the transistor switch is electrically connected with the power supply end of the red light camera module and the power supply end of the white light camera module respectively.

[0008] Further, when the controller controls the red light camera module and the white light camera module to work normally, the signal output end of the controller outputs a high level, and the signal output end of the temperature controller outputs a high level; at this time, the NAND circuit outputs a low level, and the transistor switch is turned on.

[0009] Further, when the red light camera module and the white light camera module work normally, when the single-chip microcomputer monitors that the rotating speed of the fan module reaches the maximum, and the temperature detection circuit detects that the temperature exceeds the set maximum temperature limit for a set time, the high level output by the signal output end of the temperature controller is changed into a low level.

[0010] Beneficial effects: the temperature control circuit system of the field temperature measurement equipment is provided with the temperature controller, the temperature inside the field temperature measurement equipment is monitored in real time, the fan rotation is controlled based on the real-time temperature, the field temperature measurement equipment is rapidly cooled, and the circuit and components in the field temperature measurement equipment are prevented from being damaged due to high temperature; meanwhile, the controller and the temperature control jointly control the conduction and shutdown of the on-off switch circuit, the power supply of the red light and white light cameras is controlled based on the two factors of temperature factors and circuit fault factors, and the entire circuit is timely protected from damaging the field temperature measurement equipment due to high temperature and circuit failure. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a circuit schematic view of the temperature control circuit of the field temperature measurement equipment.

[0012] Figure 2 It is a circuit schematic view of the temperature controller. DETAILED DESCRIPTION

[0013] The utility model will be further described below in combination with the drawings.

[0014] As Figure 1As shown, a temperature control circuit system of a field temperature measurement device, comprising a power module 1, a controller 2, a temperature controller 3, a white light camera module 6, a red light camera module 5 and a on-off switch circuit 4; the controller 2 is bidirectionally connected with the red light camera module 5 and the white light camera module 6 respectively, the controller 2 is bidirectionally connected with the temperature controller 3; the power module 1 is electrically connected with the red light camera module 5 and the white light camera module 6 through the on-off switch circuit 4, the temperature controller 3 and the controller 2 jointly control the on and off of the on-off switch circuit 4.

[0015] Further comprising a switch module 7 and a router module 8, the controller 2 is bidirectionally connected with the switch module 7, the switch module 7 is bidirectionally connected with the router module 8; the output end of the battery module 1 is also electrically connected with the power supply end of the controller 2 and the temperature controller 3 to supply power for them; the controller 2 is bidirectionally connected with external equipment or computer terminal through the switch module 7 and the router module 8 to receive the instruction data transmitted by the external equipment; the controller 2 sends control signals to control the red light camera module 5 and the white light camera module 6 to collect image data of the power equipment and the power grid structure according to the received instruction data, the red light camera module 5 and the white light camera module 6 transmit the collected image data to the controller 2, and the controller 2 transmits to the external equipment or computer terminal for processing through the switch module 7 and the router module 8.

[0016] As Figure 2As shown, the temperature controller 3 comprises a single-chip microcomputer 31, an AT driver 33, a fan module 34 and a temperature detection circuit 32; the collection end of the single-chip microcomputer 31 is electrically connected to the output end of the temperature detection circuit 32, the control end of the single-chip microcomputer 31 is transmissionally connected to the input end of the AT driver 33, the output end of the AT driver 33 is electrically connected to the input end of the fan module 34, and the detection end of the single-chip microcomputer 31 detects the rotating speed of the fan module 34. The power input end of the single-chip microcomputer 31 is electrically connected to a voltage power supply VCC, and the GND end of the single-chip microcomputer 31 is grounded; the single-chip microcomputer 31 is an STM32F103C8T6 single-chip microcomputer, which has strong processing capacity and high energy-saving characteristics, and provides stable and reliable data processing and control functions for the system, so as to ensure that the whole temperature control system can accurately track and adjust the temperature and meet the needs of various application scenarios; the STM32F103C8T6 single-chip microcomputer chip mainly comprises a Cortex-M3 core, various communication interfaces, an external memory interface and a DMA, and has the advantages of high performance, low power consumption, rich peripheral support, cost-effectiveness, ease of use and flexible packaging design, and has been widely applied in many fields such as industrial control, consumer electronics and communication equipment. The AT driver 33 is an AT8236 driver, an AT8236 driver is connected between the STM32 single-chip microcomputer pin and the fan, the rotating speed of the motor is accurately controlled through the pulse width modulation PWM technology by using the current attenuation mechanism of the AT8236 driver, so that the fan can be stably and continuously driven even when the single-chip microcomputer pin outputs a high level, thereby ensuring that the system can efficiently operate.

[0017] The temperature detection circuit 32 comprises a temperature sensor 35 and an R1 resistor; the DQ end of the temperature sensor 35 is electrically connected to the PB2 end of the single-chip microcomputer 31, and the DQ end of the temperature sensor 35 is electrically connected to the voltage power supply VCC through the R1 resistor; the VD end of the temperature sensor 35 is electrically connected to the voltage power supply VCC, and the GND end of the temperature sensor 35 is grounded; the voltage power supply VCC is a 5V power supply, and the resistance value of the R1 resistor is 4.7KΩ; the temperature sensor 35 is a DS18B20 temperature sensor, which outputs 16-bit binary numbers representing the detected temperature data. The temperature detection circuit 32 detects the temperature in the field temperature measuring equipment through the temperature sensor, transmits the detected temperature to the single-chip microcomputer, and the single-chip microcomputer controls the fan in the fan module to rotate according to the set temperature detection transmission instruction, and the driver controls the rotating speed of the fan according to the transmission instruction through pulse width modulation, and controls the rotation of the fan according to the temperature height.

[0018] The on / off switching circuit 4 includes a NAND circuit 41 and a transistor switch 42; one input terminal of the NAND circuit 41 is electrically connected to the signal output terminal of the controller 2, and the other input terminal of the NAND circuit 41 is electrically connected to the signal output terminal of the temperature controller 3; the output terminal of the NAND circuit 41 is electrically connected to the gate of the transistor switch 42; the source of the transistor switch 42 is electrically connected to the output terminal of the power supply module 1, and the drain of the transistor switch 42 is electrically connected to the power supply terminals of the red light camera module 5 and the white light camera module 6, respectively; the transistor switch 42 can be a PMOS transistor, and the low-level conduction and high-level deactivation are based on the voltage input to the source of the transistor switch.

[0019] When both the signal output terminal of controller 2 and the output terminal of temperature controller 3 output a high level, the NAND circuit 41 outputs a low level. If either the signal output terminal of controller 2 or the output terminal of temperature controller 3 outputs a low level, or if both output a low level, the NAND circuit 41 outputs a high level. When the NAND circuit 41 outputs a high level, transistor switch 42 is turned off, power module 1 does not supply power to the red light camera module 5 and the white light camera module 6, and the red light camera module 5 and the white light camera module 6 cease operation. When the NAND circuit 41 outputs a low level, transistor switch 42 is turned on, power module 1 supplies power to the red light camera module 5 and the white light camera module 6, and the red light camera module 5 and the white light camera module 6 resume operation.

[0020] When controller 2 controls the red light camera module 5 and the white light camera module 6 to work normally, the signal output terminal of controller 2 outputs a high level, and the signal output terminal of temperature controller 3 also outputs a high level. At this time, the NAND circuit 41 outputs a low level, and the transistor switch 42 is turned on. The temperature controller 3 and controller 2 are used together to control the on / off switching circuit, instead of directly turning off the power to all circuits. This is mainly because the temperature controller detects the temperature and maintains it at a high temperature to prevent it from dropping. Data transmission to the controller takes time, during which the high temperature may damage the circuit. Therefore, the temperature controller can output a low level independently to control the on / off switching circuit to turn off, stopping the power supply to the red light camera module 5 and the white light camera module 6.

[0021] The reason for not using a temperature controller to independently control the on / off switching circuit is that the temperature controller can only shut off the power supply due to temperature. When the red light camera module and the white light camera module malfunction and cannot work, no power supply is needed. At this time, the temperature detected by the temperature controller is within the safe range, but due to circuit faults such as short circuits, there is a high possibility of circuit fire, which could damage the field temperature measurement equipment. Therefore, the controller can send a low level signal output to the on / off switching circuit to shut off the power supply.

[0022] In summary, both the temperature controller and the control controller can independently control the on / off switching circuit, eliminating the need to transmit data to the control controller for judgment. Timely on / off switching circuit shutdown and subsequent data transmission and judgment would waste time and fail to protect the circuit in a timely manner. By controlling the on / off switching circuit simultaneously through the control controller and temperature controller, the entire circuit can simultaneously control the power supply of the red and white light cameras based on both temperature and circuit fault factors, thus protecting the entire circuit from damage to the field temperature measurement equipment due to excessive temperature or circuit faults.

[0023] At the same time, the power is not turned off to all circuits directly because the controller needs to upload the data received from the red light camera module 5 and the white light camera module 6 to external devices. At the same time, the controller 2 also needs to determine whether the temperature has dropped to a state where it can continue to work and whether there are other faults in the circuit. At this time, the controller no longer receives image data from the red light camera module 5 and the white light camera module 6, resulting in less workload and thus lower temperature.

[0024] When the red light camera module 5 and the white light camera module 6 are working normally, when the microcontroller 31 detects that the fan module 34 has reached its maximum speed and the temperature detection circuit 32 detects that the temperature exceeds the set maximum temperature limit for a set period of time, the high level output of the signal output terminal of the temperature controller 3 changes to a low level; when the red light camera module 5 and the white light camera module 6 are working normally, when the controller detects a circuit fault in the red light camera module or the white light camera module, the high level output of the signal output terminal of the controller 2 changes to a low level.

[0025] When the temperature measurement equipment is working, if the temperature detected by the temperature detection circuit exceeds the set maximum temperature value, the fan needs to be turned on to cool it down. However, if the fan has reached its maximum speed and the temperature still does not decrease after a period of time, the excessively high temperature will damage the controller and the red light camera module 5 and the white light camera module 6. Therefore, the temperature controller 3 directly controls the signal output terminal to output a low level. At this time, the transistor switch is turned off, cutting off the power supply to the red light camera module 5 and the white light camera module 6, so that the red light camera module 5 and the white light camera module 6 no longer work. The red light camera module 5 and the white light camera module 6 will not transmit data to the controller. The workload of the controller is reduced, and the temperature naturally drops.

[0026] At this time, the data just collected by the red light camera module 5 and the white light camera module 6 is transmitted to the controller. The controller can still be powered on and upload the data just collected. Then, the temperature controller transmits the processed data, the collected temperature, and the fan speed to the controller. The controller decides whether to completely shut down the power supply or control the temperature controller 3 to continue collecting temperature data. When the temperature drops to a certain threshold, the work can continue. The controller can send a control signal to the temperature controller to make the signal output terminal of the temperature controller output a high level, so that the transistor switch is turned on, and the power module continues to supply power to the red light camera module and the white light camera module to continue the field temperature measurement work.

[0027] Meanwhile, when the red light camera module 5 and the white light camera module 6 are working normally, when the microcontroller 31 sends a control signal to drive the fan to reach the maximum speed, and the temperature detection circuit 32 detects that the temperature exceeds the set maximum temperature limit for a set time, the high level output of the temperature controller 3 signal output terminal also changes to a low level; at this time, the fan may malfunction and fail to work, or there may be an open circuit in the circuit transmission that prevents the transmission of the control signal, or the drive circuit may fail to drive the fan.

[0028] The above description is merely a preferred embodiment of the present utility model. Those skilled in the art can make several modifications and optimizations based on the above disclosure without departing from the basic principles described above. These modifications and optimizations should be considered as the scope of protection of the present utility model as understood.

Claims

1. A temperature control circuit system for a field temperature measurement device, characterized in that: It includes a power supply module (1), a controller (2), a temperature controller (3), a white light camera module (6), a red light camera module (5), and an on / off switch circuit (4); the controller (2) is bidirectionally connected to the red light camera module (5) and the white light camera module (6), and the controller (2) is bidirectionally connected to the temperature controller (3); the power supply module (1) is electrically connected to the red light camera module (5) and the white light camera module (6) through the on / off switch circuit (4), and the temperature controller (3) and the controller (2) jointly control the on / off switch circuit (4) to turn on and off.

2. The temperature control circuit system of a field temperature measuring device according to claim 1, characterized in that: The temperature controller (3) includes a microcontroller (31), an AT driver (33), a fan module (34), and a temperature detection circuit (32); the acquisition terminal of the microcontroller (31) is electrically connected to the output terminal of the temperature detection circuit (32), the control terminal of the microcontroller (31) is connected to the input terminal of the AT driver (33), the output terminal of the AT driver (33) is electrically connected to the input terminal of the fan module (34), and the detection terminal of the microcontroller (31) detects the rotation speed of the fan module (34).

3. The temperature control circuit system of a field temperature measuring device according to claim 2, characterized in that: The temperature detection circuit (32) includes a temperature sensor (35) and a resistor R1; the DQ terminal of the temperature sensor (35) is electrically connected to the PB2 terminal of the microcontroller (31), and the DQ terminal of the temperature sensor (35) is electrically connected to the voltage power supply through the resistor R1.

4. The temperature control circuit system of a field temperature measuring device according to claim 1, characterized in that: The on / off switching circuit (4) includes a NAND circuit (41) and a transistor switch (42); one input terminal of the NAND circuit (41) is electrically connected to the signal output terminal of the controller (2), and the other input terminal of the NAND circuit (41) is electrically connected to the signal output terminal of the temperature controller (3); the output terminal of the NAND circuit (41) is electrically connected to the gate of the transistor switch (42); the source of the transistor switch (42) is electrically connected to the output terminal of the power supply module (1), and the drain of the transistor switch (42) is electrically connected to the power supply terminals of the red light camera module (5) and the white light camera module (6), respectively.

5. The temperature control circuit system of a field temperature measuring device according to claim 4, characterized in that: When the controller (2) controls the red light camera module (5) and the white light camera module (6) to work normally, the signal output terminal of the controller (2) outputs a high level, and the signal output terminal of the temperature controller (3) outputs a high level; at this time, the NAND circuit (41) outputs a low level, and the transistor switch (42) is turned on.

6. The temperature control circuit system of a field temperature measuring device according to claim 5, characterized in that: When the red light camera module (5) and the white light camera module (6) are working normally, when the microcontroller (31) detects that the fan module (34) reaches its maximum speed and the temperature detection circuit (32) detects that the temperature exceeds the set maximum temperature limit for a set time, the high level output of the temperature controller (3) signal output terminal changes to a low level.

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