Coal mine anti-creeping test circuit

Abstract

The utility model discloses an anti-creeping test circuit for a coal mine. The anti-creeping test circuit comprises a main control chip, a communication module, a dial switch circuit, an output control circuit, an indicating lamp circuit and an AC-to-DC circuit, the main control chip is connected with an external upper computer terminal through the communication module; the dial switch circuit is connected with the main control chip; the output control circuit is connected with the main control chip and external equipment; the indicating lamp circuit is connected with the main control chip; the AC-to-DC circuit is connected with the main control chip and is used for converting the received AC into DC. The electric leakage detection device is used for detecting the electric leakage condition of a coal mine power supply system, effectively prevents electric leakage accidents, and improves the safety of coal mine operation.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine safety equipment, in particular to a coal mine anti-leakage test circuit. Background Art

[0002] In coal mine operations, the safety of the power supply system is of vital importance. Leakage accidents not only endanger the lives of miners, but also cause significant losses to the production and operation of mines. However, existing anti-leakage equipment usually has a single function, complex operation, and cannot monitor and warn in real time, and cannot effectively prevent the occurrence of leakage accidents. Therefore, developing a new type of coal mine anti-leakage test module to improve the safety and reliability of coal mine operations is an urgent problem to be solved. Summary of the invention

[0003] According to an embodiment of the utility model, a coal mine leakage prevention test circuit is provided, comprising: a main control chip, a communication module, a dial switch circuit, an output control circuit, an indicator light circuit and an AC to DC conversion circuit;

[0004] The main control chip is connected to the external host computer terminal through the communication module;

[0005] The DIP switch circuit is connected to the main control chip;

[0006] The output control circuit is connected to the main control chip and external devices;

[0007] The indicator light circuit is connected to the main control chip;

[0008] The AC to DC circuit is connected to the main control chip and is used to convert the received AC power into DC power.

[0009] Furthermore, the dip switch circuit comprises: a dip switch, a first row of resistors and a second row of resistors;

[0010] One end of the dip switch is connected to one end of the first row of resistors and one end of the second row of resistors, and then connected to the main control chip, and the other end of the dip switch is grounded;

[0011] The other ends of the first resistor array and the second resistor array are connected to a 3.3V voltage.

[0012] Further, the output control circuit comprises: a first resistor, a triode, a relay, a freewheeling diode, a first light emitting diode and a second resistor;

[0013] One end of the first resistor is connected to the main control chip;

[0014] The base of the transistor is connected to the other end of the first resistor, and the emitter of the transistor is grounded;

[0015] Pins 1 and 2 of the relay are connected to the 5V voltage and the collector of the transistor respectively, and pins 3 and 4 of the relay are connected to the external device;

[0016] The freewheeling diode is connected in parallel to pins 1 and 2 of the relay;

[0017] The cathode of the first light emitting diode is connected to the second resistor and then connected in parallel to the pins 1 and 2 of the relay.

[0018] Further, the indicator light circuit includes: a second light emitting diode, a third light emitting diode, a fourth light emitting diode, a fifth light emitting diode, a sixth light emitting diode, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor;

[0019] The anodes of the second light emitting diode, the third light emitting diode, the fourth light emitting diode, the fifth light emitting diode and the sixth light emitting diode are connected to the main control chip;

[0020] One end of the third resistor, the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor are respectively connected to the cathode of the second light-emitting diode, the third light-emitting diode, the fourth light-emitting diode, the fifth light-emitting diode and the sixth light-emitting diode, and the other end of the third resistor, the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor are grounded.

[0021] Furthermore, the AC-to-DC circuit includes: a rectifier chip, a first capacitor, an eighth resistor and a ninth resistor;

[0022] The rectifier chip is used to convert the received alternating current into direct current, and the pin 3 of the rectifier chip is grounded through the first capacitor;

[0023] One end of the eighth resistor is connected between the first capacitor and the pin 3 of the rectifier chip, and the other end of the eighth resistor is connected to one end of the ninth resistor and then connected to the main control chip;

[0024] The other end of the ninth resistor is grounded.

[0025] Furthermore, it also includes: a storage circuit, which is connected to the main control chip and is used to store data.

[0026] Further, the storage circuit comprises: a storage chip, a tenth resistor, an eleventh resistor and a twelfth resistor;

[0027] Pins 5, 6, and 7 of the storage chip are respectively connected to one end of the tenth resistor, the eleventh resistor, and the twelfth resistor, and then connected to the main control chip;

[0028] The other ends of the tenth resistor, the eleventh resistor and the twelfth resistor are connected to the 3.3V voltage.

[0029] Furthermore, it also includes: a clock circuit, which is connected to the main control chip.

[0030] Furthermore, the clock circuit includes: a clock chip and a button battery;

[0031] Pins 5 and 6 of the clock chip are connected to the main control chip;

[0032] One end of the button battery is connected to the clock chip, and the other end of the button battery is grounded.

[0033] A coal mine anti-leakage test circuit according to an embodiment of the utility model is used to detect the leakage of a coal mine power supply system, effectively prevent the occurrence of leakage accidents, and improve the safety of coal mine operations.

[0034] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a structural principle diagram of a coal mine leakage prevention test circuit according to an embodiment of the present utility model.

[0036] Figure 2 The present invention is a circuit diagram of a main control chip of a coal mine anti-leakage test circuit according to an embodiment of the present utility model.

[0037] Figure 3 The present invention is a circuit diagram of a DIP switch circuit of a coal mine leakage prevention test circuit according to an embodiment of the present utility model.

[0038] Figure 4 The present invention is a circuit diagram of an output control circuit of a coal mine leakage prevention test circuit according to an embodiment of the present utility model.

[0039] Figure 5 The present invention is a circuit diagram of an indicator light circuit of a coal mine anti-leakage test circuit according to an embodiment of the present utility model.

[0040] Figure 6 The present invention is a circuit diagram of an AC-to-DC circuit of a coal mine leakage protection test circuit according to an embodiment of the present utility model.

[0041] Figure 7 The present invention is a circuit diagram of a storage circuit and a clock circuit of a coal mine leakage prevention test circuit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0043] First, combine Figures 1 to 7A coal mine leakage prevention test circuit according to an embodiment of the utility model is described, which is used for leakage detection of coal mine equipment and has a wide range of application scenarios.

[0044] like Figures 1 to 7 As shown, a coal mine leakage prevention test circuit of an embodiment of the utility model comprises a main control chip U1, a communication module, a dip switch SW1 circuit, an output control circuit, an indicator light circuit and an AC to DC conversion circuit.

[0045] Specifically, Figure 1~2 As shown, the main control chip U1 is connected to the external host computer terminal through the communication module, wherein the communication module adopts RS458 communication mode, and U3 is the terminal of RS458 communication.

[0046] Specifically, Figure 1 , 3 As shown, the dip switch SW1 circuit is connected to the main control chip U1. The dip switch SW1 circuit includes: a dip switch SW1, a first row of resistors RN1 and a second row of resistors RN2; one end of the dip switch SW1 is connected to the first row of resistors RN1 and one end of the second row of resistors RN2, and then connected to the main control chip U1, and the other end of the dip switch SW1 is grounded; the other ends of the first row of resistors RN1 and the second row of resistors RN2 are connected to the 3.3V voltage. The dip switch SW1 can be controlled to achieve corresponding different operation addresses. The address is set by the dip switch SW1 for multiple addresses, because there may be several switch devices to be tested in the coal mine to ensure the safety of coal miners, but our ordinary leakage test device can only test one at a time, and the data cannot be uploaded at the same time, but our test module can test multiple units at the same time, and the data can be uploaded to the host computer terminal at the same time. The host computer terminal processes the signal acquisition module to detect the safety of the circuit in the coal mine in real time.

[0047] Specifically, Figure 1 , 4As shown, the output control circuit is connected to the main control chip U1 and the external device U4. The output control circuit includes: a first resistor R14, a transistor Q1, a relay U9, a freewheeling diode D3, a first light-emitting diode LED4 and a second resistor R17; one end of the first resistor R14 is connected to the main control chip U1; the base of the transistor Q1 is connected to the other end of the first resistor R14, and the emitter of the transistor Q1 is grounded; pins 1 and 2 of the relay U9 are respectively connected to the 5V voltage and the collector of the transistor Q1, and pins 3 and 4 of the relay U9 are connected to the external device U4; the freewheeling diode D3 is connected in parallel to pins 1 and 2 of the relay U9 to protect the safety of the transistor Q1; the cathode of the first light-emitting diode LED4 is connected to the second resistor R17, and then connected in parallel to pins 1 and 2 of the relay U9. The current of the main control chip U1 pin is very small. Since the relay U9 requires a certain current to drive, the transistor Q1 is selected to provide a sufficiently stable current to achieve the effect of driving the relay U9. The transistor Q1 ensures the safety and stability of the control circuit.

[0048] Specifically, Figure 1 , 5 As shown, the indicator light circuit is connected to the main control chip U1. The indicator light circuit includes: a second light emitting diode LED6, a third light emitting diode LED2, a fourth light emitting diode LED5, a fifth light emitting diode LED1, a sixth light emitting diode LED3, a third resistor R19, a fourth resistor R15, a fifth resistor R18, a sixth resistor R2 and a seventh resistor R16; the positive electrodes of the second light emitting diode LED6, the third light emitting diode LED2, the fourth light emitting diode LED5, the fifth light emitting diode LED1 and the sixth light emitting diode LED3 are connected to the main control chip U1; one end of the third resistor R19, the fourth resistor R15, the fifth resistor R18, the sixth resistor R2 and the seventh resistor R16 are respectively connected to the negative electrodes of the second light emitting diode LED6, the third light emitting diode LED2, the fourth light emitting diode LED5, the fifth light emitting diode LED1 and the sixth light emitting diode LED3, and the other ends of the third resistor R19, the fourth resistor R15, the fifth resistor R18, the sixth resistor R2 and the seventh resistor R16 are grounded. Among them, LTX is connected to PB12 of the main control chip U1, which is a communication light. When communicating, the sixth light-emitting diode LED3 can be controlled to flash.

[0049] Specifically, Figure 1 , 6As shown, the AC-DC circuit is connected to the main control chip U1, and is used to convert the received AC power into DC power. The AC-DC circuit includes: a rectifier chip D4, a first capacitor C12, an eighth resistor R5, and a ninth resistor R6; the rectifier chip D4 is used to convert the received AC power into DC power, and the pin 3 of the rectifier chip D4 is grounded through the first capacitor C12; one end of the eighth resistor R5 is connected between the first capacitor C12 and the pin 3 of the rectifier chip D4, and the other end of the eighth resistor R5 is connected to one end of the ninth resistor R6 and then connected to the main control chip U1; the other end of the ninth resistor R6 is grounded. The rectifier chip D4 receives 127V AC to obtain DC power, and AD-UAC is an analog interface, which is connected to PA1 of the main control chip U1. PA1 is an analog input interface that collects external analog voltages.

[0050] Further, if Figure 1 , 7 As shown, a coal mine leakage prevention test circuit of the embodiment of the utility model further includes: a storage circuit, which is connected to the main control chip U1 and is used to store data. The storage circuit includes: a storage chip U8, a tenth resistor R11, an eleventh resistor R13 and a twelfth resistor R12; pins 5, 6, and 7 of the storage chip U8 are respectively connected to one end of the tenth resistor R11, the eleventh resistor R13 and the twelfth resistor R12, and then connected to the main control chip U1; the other ends of the tenth resistor R11, the eleventh resistor R13 and the twelfth resistor R12 are connected to a 3.3V voltage.

[0051] Further, if Figure 1 , 7 As shown, a coal mine leakage prevention test circuit of the utility model embodiment also includes: a clock circuit, and the clock circuit is connected to the main control chip U1. The clock circuit includes: a clock chip U10 and a button battery BT2; pins 5 and 6 of the clock chip U10 are connected to the main control chip U1; one end of the button battery BT2 is connected to the clock chip U10, and the other end of the button battery BT2 is grounded. Through the setting of the button battery BT2, when the power supply is out of power, it can ensure the recording of data. Among them, SDA is the data transmission line, and SCL is the clock line.

[0052] When working, the main control chip U1 receives the signal transmitted from the external host computer terminal through the communication module, and then the main control chip U1 processes the data, controls the KOSY pin based on the processed data, and drives the relay U9 to cut off the power supply, disconnect the power supply of the external mining equipment, and achieve the effect of preventing leakage.

[0053] Above, refer to Figures 1 to 7 A coal mine anti-leakage test circuit according to an embodiment of the utility model is described, which is used to detect the leakage of the coal mine power supply system, effectively prevent the occurrence of leakage accidents, and improve the safety of coal mine operations.

[0054] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0055] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A coal mine leakage prevention test circuit, characterized in that: Contains: main control chip, communication module, DIP switch circuit, output control circuit, indicator light circuit and AC to DC circuit; The main control chip is connected to an external host computer terminal through the communication module; The DIP switch circuit is connected to the main control chip; The output control circuit is connected to the main control chip and external equipment; The indicator light circuit is connected to the main control chip; The AC-to-DC circuit is connected to the main control chip and is used to convert received AC power into DC power.

2. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: The dip switch circuit comprises: a dip switch, a first row of resistors and a second row of resistors; One end of the dip switch is connected to one end of the first row of resistors and one end of the second row of resistors, and then connected to the main control chip, and the other end of the dip switch is grounded; The other ends of the first resistor array and the second resistor array are connected to a 3.3V voltage.

3. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: The output control circuit comprises: a first resistor, a triode, a relay, a freewheeling diode, a first light emitting diode and a second resistor; One end of the first resistor is connected to the main control chip; The base of the transistor is connected to the other end of the first resistor, and the emitter of the transistor is grounded; Pins 1 and 2 of the relay are connected to a 5V voltage and the collector of the transistor respectively, and pins 3 and 4 of the relay are connected to an external device; The freewheeling diode is connected in parallel to pins 1 and 2 of the relay; After the cathode of the first light emitting diode is connected to the second resistor, it is connected in parallel to the pins 1 and 2 of the relay.

4. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: The indicator light circuit comprises: a second light emitting diode, a third light emitting diode, a fourth light emitting diode, a fifth light emitting diode, a sixth light emitting diode, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor; The anodes of the second light emitting diode, the third light emitting diode, the fourth light emitting diode, the fifth light emitting diode and the sixth light emitting diode are connected to the main control chip; One end of the third resistor, the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor are respectively connected to the cathode of the second light-emitting diode, the third light-emitting diode, the fourth light-emitting diode, the fifth light-emitting diode and the sixth light-emitting diode, and the other end of the third resistor, the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor are grounded.

5. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: The AC-to-DC circuit comprises: a rectifier chip, a first capacitor, an eighth resistor and a ninth resistor; The rectifier chip is used to convert the received alternating current into direct current, and the pin 3 of the rectifier chip is grounded through the first capacitor; One end of the eighth resistor is connected between the first capacitor and the pin 3 of the rectifier chip, and the other end of the eighth resistor is connected to one end of the ninth resistor and then connected to the main control chip; The other end of the ninth resistor is grounded.

6. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: It also includes: a storage circuit, which is connected to the main control chip and is used to store data.

7. The coal mine leakage prevention test circuit as claimed in claim 6, characterized in that: The storage circuit comprises: a storage chip, a tenth resistor, an eleventh resistor and a twelfth resistor; Pins 5, 6, and 7 of the storage chip are respectively connected to one end of the tenth resistor, the eleventh resistor, and the twelfth resistor, and then connected to the main control chip; The other ends of the tenth resistor, the eleventh resistor and the twelfth resistor are connected to a 3.3V voltage.

8. The coal mine leakage prevention test circuit as claimed in claim 1, characterized in that: It also includes: a clock circuit, which is connected to the main control chip.

9. The coal mine leakage prevention test circuit as claimed in claim 8, characterized in that: The clock circuit comprises: a clock chip and a button battery; Pins 5 and 6 of the clock chip are connected to the main control chip; One end of the button battery is connected to the clock chip, and the other end of the button battery is grounded.

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