A turnout snow melting control circuit

Abstract

The present invention belongs to the turnout snow melting technology used in the rail transit industry, and particularly relates to a turnout snow melting control circuit, which is characterized in that it includes: a rain and snow sensor (1), an optocoupler (2), a voltage regulator IC (3), a temperature sensor (4), a wireless transmission module control IC (5), a wireless transmission module (6), a wireless reception module (7), a wireless reception control IC (8), and a snow melting device (9); the rain and snow sensor (1) is a multi-electrode and multi-site cross-short circuit structure formed by two conductors. One of the two conductor electrodes is electrically connected to the power supply voltage through a resistor R1, and the other is connected to the negative terminal of the power supply through a light-emitting diode; the power supply voltage is divided into three paths. The second path outputs a working voltage of 3V - 5V through the voltage regulator IC (3) to supply the wireless transmission module control IC (5), and the third path is supplied to the wireless transmission module (6). This turnout snow melting control circuit is used to improve the safety and reliability of the snow melting device, and at the same time make the construction more convenient.

Description

Technical Field

[0001] The present invention belongs to the switch snow melting technology used in the rail transit industry, and particularly relates to a switch snow melting control circuit. Background Art

[0002] The switch snow melting technology is to install a rail bottom rain and snow sensor on the switch to melt the switch snow by metal resistance heating, so as to realize the safe operation of the track. The rail bottom rain and snow monitor mainly monitors rain and snow and transmits the signal to the PCU to control the snow melting equipment to heat. The commonly used rain and snow monitors are mainly installed beside the railway to monitor whether there is snow on the switch. The switch snow melting control circuit monitors through the rain and snow sensor installed on the rail bottom. When there is snow, the two electrodes of the sensor are short-circuited, and the triggered signal is transmitted to the PCU to control the snow melting equipment to heat.

[0003] The control circuit short-circuits the two electrodes because of rain and snow. Due to the simple structure, the signal is easily triggered, often causing mis-startup.

[0004] In addition, the PCU that controls the snow melting equipment is at a certain distance from the sensor. Usually, it is connected by wire, and interference electrical signals can also cause the snow melting equipment to mis-start on snow-free days. Summary of the Invention

[0005] The purpose of the present invention is to provide a switch snow melting control circuit to improve the safety and reliability of the snow melting equipment and make the construction more convenient at the same time.

[0006] The technical solution of the present invention is as follows: It relates to a turnout snow melting control circuit, characterized in that it includes: a rain and snow sensor, an optocoupler, a voltage stabilizing IC, a temperature sensor, a wireless transmission module control IC, a wireless transmission module, a wireless reception module, a wireless reception control IC, and a snow melting device; the rain and snow sensor is a multi-electrode and multi-site cross short-circuit structure formed by two conductors. One of the two conductor electrodes is electrically connected to the power supply voltage through a resistor R1, and the other is connected to the negative terminal of the power supply through a light-emitting diode; the power supply voltage is divided into three paths. The second path outputs a working voltage of 3V - 5V through the voltage stabilizing IC to supply the wireless transmission module control IC, and the third path is provided to the wireless transmission module; the wireless transmission module control IC includes at least three interfaces; the first is an analog-to-digital conversion interface, the second is the control port of the wireless transmission module, and the third is the snow melting state signal interface; the analog-to-digital conversion interface is used to be electrically connected to the output end of the temperature sensor, and the wireless transmission module control IC converts the on-site temperature signal of the temperature sensor into an electrical signal; the control port is used to send out the electrical signal converted from the on-site temperature signal of the temperature sensor; the snow melting state signal interface is used to receive the snow melting state signal; the wireless reception module, the wireless reception control IC, and the snow melting device constitute a heating strip heating and snow melting on-site circuit. The wireless reception module is radio-connected to the wireless transmission module. The wireless reception module and the wireless transmission module separate two different working places. The wireless reception module is electrically connected to the wireless reception control IC. The wireless reception control IC receives the snow melting state signal of the rain and snow sensor through the wireless reception module. The snow melting state signal is represented by a temperature signal, and the authenticity of the snow melting state signal is further judged by receiving the temperature signal; when the temperature is less than 0 degrees, the wireless reception control IC will control the snow melting device to work through I / O to melt the snow on the turnout; when the temperature is greater than 0 degrees, the wireless reception control IC will control the snow melting device not to work through I / O.

[0007] The voltage stabilizing IC is a 3 - 5V voltage stabilizing IC, which is used to convert the input 24V voltage into a 3 - 5V voltage output.

[0008] The temperature sensor is an AD590. When the temperature changes by one degree, there will be a current output of 1uA. Therefore, the output end of the AD590 is electrically connected to the negative terminal of the power supply through a standard resistor RO. The resistance value of the standard resistor RO is 1K. Therefore, for every one-degree change in temperature, there will be a 1mV voltage change on the standard resistor RO.

[0009] The frequency of the wireless transmission module is 315MHZ or 433MHZ.

[0010] The snow melting state signal interface is a phototransistor. The emitter of the phototransistor is connected to the negative terminal of the power supply. The collector of the phototransistor is electrically connected to the output end of the voltage stabilizing IC through a resistor R2. The photoelectric receiving end of the phototransistor is optically connected to the light-emitting diode.

[0011] The photoelectric receiving end of the phototransistor is optically connected to the light-emitting diode through an optical fiber medium to achieve optoelectronic connection.

[0012] The snow melting device is an electric heating strip, which is connected to the switch through a tooling. The electric heating strip is thermally connected to the switch through an insulating heat conductor. The electric heating strip is electrically connected to the power supply through a relay switch, and the relay switch is electrically connected to the I / O port of the wireless receiving control IC.

[0013] The working principle and advantages of the present invention are as follows: The present invention transmits the received switch snow melting state information in the form of temperature, and further identifies the authenticity and necessity of the switch snow melting state information through the temperature signal. When the ambient temperature is high, the switch snow melting will not freeze, and the switch snow can be quickly melted by not heating or heating for a short time; when the ambient temperature is low, the switch snow melting will freeze, so it takes a long time or high-power work to melt the switch snow.

[0014] The present invention will be further described below with reference to the illustrated drawings. Description of the Drawings

[0015] Figure 1 is the circuit schematic diagram of the first embodiment of the present invention;

[0016] Figure 2 is the circuit schematic diagram of the second embodiment of the present invention;

[0017] Figure 3 is the circuit schematic diagram of the third embodiment of the present invention.

[0018] In the figure, 1, rain and snow sensor; 2, optocoupler; 3, voltage regulator IC; 4, temperature sensor AD590; 5, wireless transmission module control IC; 6, wireless transmission module; 7, wireless receiving module; 8, wireless receiving control IC; 9, snow melting device. Detailed Embodiments

[0019] Such as Figure 1As shown in the figure, the present invention provides a turnout snow melting control circuit, which is characterized in that it includes a rain and snow sensor 1, an optocoupler 2, a voltage regulator IC 3, a temperature sensor 4, a wireless transmission module control IC 5, a wireless transmission module 6, a wireless reception module 7, a wireless reception control IC 8, and a snow melting device 9; the rain and snow sensor 1 is a multi-electrode and multi-site cross-short circuit structure formed by two conductors. One of the two conductor electrodes is electrically connected to the power supply voltage through a resistor R1, and the other is connected to the negative terminal of the power supply through a light-emitting diode; the power supply voltage is divided into three paths. The second path outputs a working voltage of 3V - 5V through the voltage regulator IC 3 to supply the wireless transmission module control IC 5, and the third path is provided to the wireless transmission module 6; the wireless transmission module control IC 5 includes at least three interfaces; the first is an analog-to-digital conversion interface, the second is the control port of the wireless transmission module 6, and the third is the snow melting state signal interface; the analog-to-digital conversion interface is used to be electrically connected to the output terminal of the temperature sensor 4, and the wireless transmission module control IC 5 converts the on-site temperature signal of the temperature sensor 4 into an electrical signal; the control port is used to send out the electrical signal converted from the on-site temperature signal of the temperature sensor 4; the snow melting state signal interface is used to receive the snow melting state signal; the wireless reception module 7, the wireless reception control IC 8, and the snow melting device 9 form a heating strip to heat the snow melting site circuit. The wireless reception module 7 is radio-connected to the wireless transmission module 6. The wireless reception module 7 and the wireless transmission module 6 separate two different working places. The wireless reception module 7 is electrically connected to the wireless reception control IC 8. The wireless reception control IC 8 receives the snow melting state signal of the rain and snow sensor 1 through the wireless reception module 7. The snow melting state signal is represented by a temperature signal, and the authenticity of the snow melting state signal is further judged by receiving the temperature signal. When the temperature is less than 0 degrees, the wireless reception control IC 8 will control the snow melting device 9 to work through I / O to melt the snow on the turnout; when the temperature is greater than 0 degrees, the wireless reception control IC 8 will control the snow melting device 9 not to work through I / O.

[0020] The voltage regulator IC 3 is a 3 - 5V voltage regulator IC 3, which is used to convert the input 24V voltage into a 3 - 5V voltage output.

[0021] The temperature sensor 4 is an AD590. When the temperature changes by one degree, there will be a current output of 1uA. Therefore, the output terminal of the AD590 is electrically connected to the negative terminal of the power supply through a standard resistor RO. The resistance value of the standard resistor RO is 1K. Therefore, when the temperature changes by one degree, there will be a voltage change of 1mV on the standard resistor RO.

[0022] The frequency of the wireless transmission module 6 is 315MHZ or 433MHZ.

[0023] The snow melting state signal interface described above is a photoelectric triode. The emitter of the photoelectric triode is connected to the negative terminal of the power supply. The collector of the photoelectric triode is electrically connected to the output terminal of the voltage regulator IC3 through a resistor R2. The photoelectric receiving end of the photoelectric triode is optically connected to the light-emitting diode described above.

[0024] The optical connection between the photoelectric receiving end of the photoelectric triode and the light-emitting diode described above is realized through an optical fiber medium for optoelectronic connection.

[0025] The snow melting device 9 described above is an electric heating strip. The electric heating strip is connected to the turnout through a tooling. The electric heating strip is thermally connected to the turnout through an insulating heat conductor. The electric heating strip is electrically connected to the power supply through a relay switch. The relay switch is electrically connected to the I / O port of the wireless receiving and controlling IC8.

[0026] The working principle and advantages of the present invention are as follows: The present invention transmits the received turnout snow melting state information in the form of temperature, and further identifies the authenticity and necessity of the turnout snow melting state information through the temperature signal. When the ambient temperature is high, the snow on the turnout will not freeze, and the snow on the turnout can be quickly melted by not heating or heating for a short time. When the ambient temperature is low, the snow on the turnout will freeze, so it is necessary to work for a long time or with high power to melt the snow on the turnout.

[0027] Embodiment 2

[0028] As Figure 2 shown, the difference from Embodiment 1 is that the optical connection between the photoelectric receiving end of the photoelectric triode and the light-emitting diode described above is realized through an optical fiber medium for optoelectronic connection; the other circuits in Embodiment 2 are the same as those in Embodiment 1.

[0029] Embodiment 3

[0030] As Figure 3 shown, the difference from Embodiment 1 is that the temperature sensor 4 is a thermistor; the other circuits in Embodiment 3 are the same as those in Embodiment 1.

Claims

1. A turnout snow melting control circuit, characterized in that it includes: Rain and snow sensor (1), optocoupler (2), voltage regulator IC (3), temperature sensor (4), wireless transmission module control IC (5), wireless transmission module (6), wireless reception module (7), wireless reception control IC (8), snow melting device (9); The rain and snow sensor (1) is a multi-electrode and multi-site cross short-circuit structure formed by two conductors. One of the two conductor electrodes is electrically connected to the power supply voltage through a resistor R1, and the other is connected to the negative terminal of the power supply through a light-emitting diode; The power supply voltage is divided into three paths. The second path outputs a working voltage of 3V - 5V through the voltage regulator IC (3) to supply the wireless transmission module control IC (5), and the third path is supplied to the wireless transmission module (6); The wireless transmission module control IC (5) includes at least three interfaces; The first is an analog-to-digital conversion interface, the second is the control port of the wireless transmission module (6), and the third is the snow melting state signal interface; The analog-to-digital conversion interface is used to be electrically connected to the output end of the temperature sensor (4), and the wireless transmission module control IC (5) converts the on-site temperature signal of the temperature sensor (4) into an electrical signal; The control port is used to send out the electrical signal converted from the on-site temperature signal of the temperature sensor (4); The snow melting state signal interface is used to receive the snow melting state signal; The wireless reception module (7), wireless reception control IC (8) and snow melting device (9) form a heating strip to heat the snow melting on-site circuit. The wireless reception module (7) is radio-connected to the wireless transmission module (6). The wireless reception module (7) and the wireless transmission module (6) separate two different working places. The wireless reception module (7) is electrically connected to the wireless reception control IC (8). The wireless reception control IC (8) receives the snow melting state signal of the rain and snow sensor (1) through the wireless reception module (7). The snow melting state signal is represented by a temperature signal, and the authenticity of the snow melting state signal is further judged by receiving the temperature signal; When the temperature is less than 0 degrees, the wireless reception control IC (8) will control the snow melting device (9) to work through I / O to melt the snow on the turnout; When the temperature is greater than 0 degrees, the wireless reception control IC (8) will control the snow melting device (9) not to work through I / O; The voltage regulator IC (3) is a 3 - 5V voltage regulator IC, which is used to convert the input 24V voltage into a 3 - 5V voltage output; The temperature sensor (4) is an AD590. The output end of the AD590 is electrically connected to the negative terminal of the power supply through a standard resistor RO, and the resistance value of the standard resistor RO is 1K; The frequency of the wireless transmission module (6) is 315MHZ or 433MHZ; The snow melting state signal interface is a phototransistor. The emitter of the phototransistor is connected to the negative terminal of the power supply. The collector of the phototransistor is electrically connected to the output end of the voltage regulator IC (3) through a resistor R2, and the photoelectric receiving end of the phototransistor is optically connected to the light-emitting diode.

2. The turnout snow melting control circuit according to claim 1, characterized in that: The optical connection between the photoelectric receiving end of the phototransistor and the light-emitting diode is realized through an optical fiber medium.

3. The turnout snow melting control circuit according to claim 1, characterized in that: The snow melting device (9) described above is an electric heating strip. The electric heating strip is connected to the switch through a tooling. The electric heating strip is thermally connected to the switch through an insulating heat conductor. The electric heating strip is electrically connected to a power supply through a relay switch, and the relay switch is electrically connected to the I / O port of the wireless receiving and controlling IC (8).

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