Current and voltage detection circuit of mining explosion-proof switch

Abstract

The utility model discloses a current and voltage detection circuit of a mining explosion-proof switch. The current and voltage detection circuit comprises a microcontroller, a current acquisition circuit, a voltage acquisition circuit and a communication circuit, the current acquisition circuit is connected with the microcontroller and is used for acquiring the current of an external mining explosion-proof switch; the voltage acquisition circuit is connected with the microcontroller and is used for acquiring the voltage of an external mining explosion-proof switch; and the communication circuit is connected with the microcontroller and is used for communication. According to the utility model, the current and voltage of the mining explosion-proof switch can be monitored, so that when the mining explosion-proof switch is abnormal, timely processing is carried out, and accidents are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of explosion-proof switches for mines, in particular to a current and voltage detection circuit of explosion-proof switches for mines. Background Art

[0002] Mine explosion-proof switches are switches specially designed for use in flammable and explosive mine environments. Their internal structure and materials can prevent sparks, thereby reducing the risk of explosion. When using mine explosion-proof switches, it is usually necessary to detect their working status and discover abnormal conditions in time to ensure the safe operation of the mine. For this purpose, a current and voltage detection circuit for mine explosion-proof switches is designed. Summary of the invention

[0003] According to an embodiment of the utility model, a current and voltage detection circuit of a mining explosion-proof switch is provided, comprising: a microcontroller, a current collection circuit, a voltage collection circuit and a communication circuit;

[0004] The current collection circuit is connected to the microcontroller and is used to collect the current of the external mining explosion-proof switch;

[0005] The voltage collection circuit is connected to the microcontroller and is used to collect the voltage of the external mining explosion-proof switch;

[0006] The communication circuit is connected to the microcontroller for communication.

[0007] Further, the current acquisition circuit includes: a mutual inductor, a first operational amplifier, a first resistor, a second resistor, a first capacitor, a first follower, a third resistor, a fourth resistor, a fifth resistor, a second operational amplifier, a sixth resistor, a seventh resistor, a second follower, an eighth resistor and a ninth resistor;

[0008] The transformer is connected to an external mining explosion-proof switch;

[0009] The non-inverting input terminal of the first operational amplifier is connected to one end of the mutual inductor, the inverting input terminal of the second operational amplifier is connected to the other end of the mutual inductor and one end of the first resistor, and the output terminal of the first operational amplifier is connected to the other end of the first resistor and one end of the second resistor;

[0010] The other end of the second resistor is grounded through the first capacitor, the other end of the second resistor is connected to the input end of the first follower, and the other end of the second resistor is connected to the non-inverting input end of the second operational amplifier through the fifth resistor;

[0011] The output terminal of the first follower is connected to the microcontroller through a third resistor;

[0012] One end of the fourth resistor is connected between the third resistor and the microcontroller, and the other end of the fourth resistor is connected to the 3.3V voltage;

[0013] The inverting input terminal of the second operational amplifier is grounded through a sixth resistor, the inverting input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier through a seventh resistor, and the output terminal of the second operational amplifier is connected to the output terminal of the second follower through an eighth resistor;

[0014] The output end of the second follower is connected to the microcontroller;

[0015] One end of the ninth resistor is connected between the eighth resistor and the output end of the second follower, and the other end of the ninth resistor is connected to the 3.3V voltage.

[0016] Further, the voltage acquisition circuit includes: a voltage transformer, a third operational amplifier, a tenth resistor, a second capacitor, a third follower, an eleventh resistor, a twelfth resistor and a thirteenth resistor;

[0017] The voltage transformer is connected to an external explosion-proof switch;

[0018] The non-inverting input terminal of the third operational amplifier is connected to the first output terminal of the voltage transformer and then grounded, the inverting input terminal of the third operational amplifier is connected to the second output terminal of the voltage transformer and one end of the tenth resistor, and the output terminal of the third operational amplifier is connected to one end of the tenth resistor and one end of the eleventh resistor;

[0019] The other end of the eleventh resistor is grounded via the second capacitor, and the other end of the eleventh resistor is connected to the input end of the third follower;

[0020] The output end of the third follower is connected to the microcontroller through a twelfth resistor;

[0021] One end of the thirteenth resistor is connected between the twelfth resistor and the microcontroller, and the other end of the thirteenth resistor is connected to the 3.3V voltage.

[0022] Further, the communication circuit includes: a transceiver, a converter chip, a TVC diode, a fourteenth resistor and a fifteenth resistor;

[0023] The transceiver is connected to the microcontroller;

[0024] The converter chip is connected to the transceiver and the microcontroller;

[0025] One end of the fourteenth resistor is connected to a 5V voltage;

[0026] One end of the fifteenth resistor is grounded, and the other end of the fifteenth resistor is connected to the other end of the fourteenth resistor and then connected to the transceiver;

[0027] One end of the TVC diode is connected to the other end of the fourteenth resistor, and the other end of the TVC diode is connected to the other end of the fifteenth resistor.

[0028] According to a current and voltage detection circuit of a mine explosion-proof switch in an embodiment of the utility model, the current and voltage of the mine explosion-proof switch can be monitored, so that when an abnormality occurs in the mine explosion-proof switch, timely processing can be carried out to prevent accidents.

[0029] 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

[0030] Figure 1 The present invention is a circuit diagram of a current acquisition circuit of a current and voltage detection circuit of a mining explosion-proof switch according to an embodiment of the present utility model.

[0031] Figure 2 The present invention is a circuit diagram of a voltage acquisition circuit of a current and voltage detection circuit of a mining explosion-proof switch according to an embodiment of the present utility model.

[0032] Figure 3 The present invention is a circuit diagram of a communication circuit of a current and voltage detection circuit of a mining explosion-proof switch according to an embodiment of the present utility model.

[0033] Figure 4 The present invention is a circuit diagram of a microcontroller of a current and voltage detection circuit of a mining explosion-proof switch according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0034] 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.

[0035] First, combine Figures 1 to 4 A current and voltage detection circuit for a mine explosion-proof switch according to an embodiment of the utility model is described, which is used to perform current and voltage detection on the mine explosion-proof switch and has a wide range of application scenarios.

[0036] like Figures 1 to 4 As shown, a current and voltage detection circuit of a mine explosion-proof switch according to an embodiment of the utility model has a current and voltage detection circuit of a mine explosion-proof switch, including: a microcontroller U7, a current acquisition circuit, a voltage acquisition circuit and a communication circuit.

[0037] Specifically, Figure 1 , 4As shown, the current acquisition circuit is connected to the microcontroller U7 and is used to collect the current of the external mining explosion-proof switch. The current acquisition circuit includes: a mutual inductor U3, a first operational amplifier U6, a first resistor R3, a second resistor R6, a first capacitor C1, a first follower U4B, a third resistor R8, a fourth resistor R10, a fifth resistor R7, a second operational amplifier U4A, a sixth resistor R15, a seventh resistor R13, a second follower U41C, an eighth resistor R9 and a ninth resistor R12; the mutual inductor U3 is connected to the external mining explosion-proof switch; the in-phase input terminal of the first operational amplifier U6 is connected to one end of the mutual inductor U3, the inverting input terminal of the second operational amplifier U4A is connected to the other end of the mutual inductor U3 and one end of the first resistor R3, the output terminal of the first operational amplifier U6 is connected to the other end of the first resistor R3 and one end of the second resistor R6; the other end of the second resistor R6 is grounded through the first capacitor C1, the other end of the second resistor R6 is connected to the input terminal of the first follower U4B, and the second resistor R6 is grounded through the first capacitor C1. The other end of R6 is connected to the in-phase input terminal of the second operational amplifier U4A through the fifth resistor R7; the output terminal of the first follower U4B is connected to the microcontroller U7 through the third resistor R8; one end of the fourth resistor R10 is connected between the third resistor R8 and the microcontroller U7, and the other end of the fourth resistor R10 is connected to the 3.3V voltage; the inverting input terminal of the second operational amplifier U4A is grounded through the sixth resistor R15, the inverting input terminal of the second operational amplifier U4A is connected to the output terminal of the second operational amplifier U4A through the seventh resistor R13, and the output terminal of the second operational amplifier U4A is connected to the output terminal of the second follower U41C through the eighth resistor R9; the output terminal of the second follower U41C is connected to the microcontroller; one end of the ninth resistor R12 is connected between the eighth resistor R9 and the output terminal of the second follower U41C, and the other end of the ninth resistor R12 is connected to the 3.3V voltage.

[0038] Specifically, Figure 2 , 4As shown, the voltage acquisition circuit is connected to the microcontroller U7 and is used to collect the voltage of the external explosion-proof switch for mining. The voltage acquisition circuit includes: a voltage transformer U13, a third operational amplifier U16, a tenth resistor R30, a second capacitor C6, a third follower U15B, an eleventh resistor R34, a twelfth resistor R36 and a thirteenth resistor R37; the voltage transformer U13 is connected to the external explosion-proof switch; the in-phase input terminal of the third operational amplifier U16 is connected to the first output terminal of the voltage transformer U13 and then grounded, and the inverting input terminal of the third operational amplifier U16 is connected to the second output terminal of the voltage transformer U13 and one end of the tenth resistor R30. The output end of the third operational amplifier U16 is connected to one end of the tenth resistor R30 and one end of the eleventh resistor R34; the other end of the eleventh resistor R34 is grounded through the second capacitor C6, and the other end of the eleventh resistor R34 is connected to the input end of the third follower U15B; the output end of the third follower U15B is connected to the microcontroller U7 through the twelfth resistor R36; one end of the thirteenth resistor R37 is connected between the twelfth resistor R36 and the microcontroller U7, and the other end of the thirteenth resistor R37 is connected to the 3.3V voltage.

[0039] Specifically, Figure 3 , 4 As shown, the communication circuit is connected to the microcontroller U7 for communication. The communication circuit includes: a transceiver U19, a converter chip U47, a TVC diode D5, a fourteenth resistor R42, and a fifteenth resistor R43; the transceiver U19 is connected to the microcontroller U7; the converter chip U47 is connected to the transceiver U19 and the microcontroller U7; one end of the fourteenth resistor R42 is connected to a 5V voltage; one end of the fifteenth resistor R43 is grounded, and the other end of the fifteenth resistor R43 is connected to the other end of the fourteenth resistor R42 and then connected to the transceiver U19; one end of the TVC diode D5 is connected to the other end of the fourteenth resistor R42, and the other end of the TVC diode D5 is connected to the other end of the fifteenth resistor R43. The microcontroller U7 can send and receive information data through the communication circuit.

[0040] like Figure 1 , 4As shown, the current of the mining explosion-proof switch is collected through the mutual inductor U3, and the current signal is converted into a voltage signal. At the same time, it is op-amped through the first operational amplifier U6. When the current is large, it is input into the microcontroller U7 through the first follower U4B. When the current is small, it is amplified by the second operational amplifier U4A and input into the microcontroller U7 through the second follower U41C. By different amplification precisions, the signal is transmitted to different operational amplifiers, so that different currents can be collected by processing different precisions. After the current is collected, it is processed by the microcontroller U7. By comparing the collected current with the current we preset, if the collected current is normal, it proves that the current is normal, ensuring that it is within the normal working range.

[0041] like Figure 2 , 4 As shown, the current input terminals U01 and Ucom are alternating current. The voltage of the mining explosion-proof switch is collected through the voltage transformer U13, and then amplified through the third operational amplifier U16 and the third follower U15B and input into the microcontroller U7. The microcontroller U7 processes the collected voltage and compares it with the preset voltage. If the collected voltage is normal, it proves that the voltage is normal, ensuring that it is within the normal working range.

[0042] Above, refer to Figures 1 to 4 A current and voltage detection circuit for a mine explosion-proof switch according to an embodiment of the utility model is described, which can monitor the current and voltage of the mine explosion-proof switch, so that when an abnormality occurs in the mine explosion-proof switch, timely processing can be carried out to prevent accidents.

[0043] 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.

[0044] 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 current and voltage detection circuit for a mining explosion-proof switch, characterized in that: Including: microcontroller, current acquisition circuit, voltage acquisition circuit and communication circuit; The current collection circuit is connected to the microcontroller and is used to collect the current of the external mining explosion-proof switch; The voltage collection circuit is connected to the microcontroller and is used to collect the voltage of an external mining explosion-proof switch; The communication circuit is connected to the microcontroller for communication; The communication circuit comprises: a transceiver, a converter chip, a TVC diode, a fourteenth resistor and a fifteenth resistor; The transceiver is connected to the microcontroller; The converter chip is connected to the transceiver and the microcontroller; One end of the fourteenth resistor is connected to a 5V voltage; One end of the fifteenth resistor is grounded, and the other end of the fifteenth resistor is connected to the other end of the fourteenth resistor and then connected to the transceiver; One end of the TVC diode is connected to the other end of the fourteenth resistor, and the other end of the TVC diode is connected to the other end of the fifteenth resistor.

2. The current and voltage detection circuit of the explosion-proof switch for mining as claimed in claim 1, characterized in that: The current acquisition circuit comprises: a mutual inductor, a first operational amplifier, a first resistor, a second resistor, a first capacitor, a first follower, a third resistor, a fourth resistor, a fifth resistor, a second operational amplifier, a sixth resistor, a seventh resistor, a second follower, an eighth resistor and a ninth resistor; The mutual inductor is connected to an external mining explosion-proof switch; The non-inverting input terminal of the first operational amplifier is connected to one end of the mutual inductor, the inverting input terminal of the second operational amplifier is connected to the other end of the mutual inductor and one end of the first resistor, and the output terminal of the first operational amplifier is connected to the other end of the first resistor and one end of the second resistor; The other end of the second resistor is grounded through the first capacitor, the other end of the second resistor is connected to the input end of the first follower, and the other end of the second resistor is connected to the non-inverting input end of the second operational amplifier through the fifth resistor; The output end of the first follower is connected to the microcontroller through the third resistor; One end of the fourth resistor is connected between the third resistor and the microcontroller, and the other end of the fourth resistor is connected to a 3.3V voltage; The inverting input terminal of the second operational amplifier is grounded through the sixth resistor, the inverting input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier through the seventh resistor, and the output terminal of the second operational amplifier is connected to the output terminal of the second follower through the eighth resistor; The output end of the second follower is connected to the microcontroller; One end of the ninth resistor is connected between the eighth resistor and the output end of the second follower, and the other end of the ninth resistor is connected to a 3.3V voltage.

3. The current and voltage detection circuit of the explosion-proof switch for mining as claimed in claim 1, characterized in that: The voltage acquisition circuit comprises: a voltage transformer, a third operational amplifier, a tenth resistor, a second capacitor, a third follower, an eleventh resistor, a twelfth resistor and a thirteenth resistor; The voltage transformer is connected to an external explosion-proof switch; The non-inverting input terminal of the third operational amplifier is connected to the first output terminal of the voltage transformer and then grounded, the inverting input terminal of the third operational amplifier is connected to the second output terminal of the voltage transformer and one end of the tenth resistor, and the output terminal of the third operational amplifier is connected to one end of the tenth resistor and one end of the eleventh resistor; The other end of the eleventh resistor is grounded through the second capacitor, and the other end of the eleventh resistor is connected to the input end of the third follower; The output end of the third follower is connected to the microcontroller through the twelfth resistor; One end of the thirteenth resistor is connected between the twelfth resistor and the microcontroller, and the other end of the thirteenth resistor is connected to a 3.3V voltage.

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