Intrinsic safety type mining wireless sensor

Abstract

The utility model discloses an intrinsic safety type mining wireless sensor. The intrinsic safety type mining wireless sensor comprises an MCU single-chip microcomputer, a power supply control circuit, a signal conversion circuit, a power supply output protection circuit, an LORA module and a voltage detection circuit. According to the utility model, the MCU singlechip with low power consumption is matched with the intermittent working mode of the wireless sensor, so that the service time of the lithium iron carbonate 3.3 V battery is prolonged, the signal conversion circuit is used for converting the input signal, the accurate value of the wireless sensor can be obtained, the error and the interference of the signal are reduced, and the reliability of the wireless sensor is improved. In addition, signal transmission is carried out in a Lora wireless mode, the signal transmission distance is guaranteed, power output can be turned off in time under the condition that an output power supply is short-circuited, the phenomenon that large current burns out an internal circuit of equipment or causes external short-circuit sparks is reduced, the intrinsic safety requirement is met, and the service life of the equipment is prolonged. Therefore, the power consumption problem, the signal transmission distance problem and the intrinsic safety problem are solved, and the use requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless sensor technical field especially relates to a kind of intrinsic safety type mine wireless sensor. BACKGROUND

[0002] The product about mine wireless sensor existing at present all work in the state of uninterrupted power supply, its power consumption is big and does not have long-term working capacity, the transmission of signal mostly is using AD value to transfer, is susceptible to interference and error is big;Signal reception uses WIFI or Bluetooth and other wireless forms, and receiving distance is limited;And power output does not have the requirement of intrinsic safety, therefore, the present application proposes a kind of intrinsic safety type mine wireless sensor. CONTENT OF UTILITY MODEL

[0003] The utility model aims at solving the shortcoming existing in prior art, and proposes a kind of intrinsic safety type mine wireless sensor.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A kind of intrinsic safety type mine wireless sensor, including MCU single-chip microcomputer, power control circuit, signal conversion circuit, power output protection circuit, LORA module, voltage detection circuit and lithium carbonate iron 3.3V battery, the MCU single-chip microcomputer is electrically connected with power control circuit, signal conversion circuit, power output protection circuit, LORA module, voltage detection circuit and lithium carbonate iron 3.3V battery, and signal conversion circuit and power output protection circuit are electrically connected with the signal input end of external sensor.

[0006] Preferably, the power supply control circuit comprises chip U6, the pin 1 of chip U6 is electrically connected with the anode of diode D3 and one end of inductor L1, the other end of inductor L1 is electrically connected with the pin 5 of chip U6, the cathode of diode D3 is electrically connected with one end of resistor R16, one end of capacitor C12, one end of capacitor C13 and one end of capacitor C14, the other end of resistor R16 is electrically connected with one end of resistor R23, the pin 3 of chip U6 is electrically connected with one end of resistor R23 and the other end of resistor R16, the pin 5 and pin 4 of chip U6 are respectively electrically connected with one end of capacitor C21 and one end of capacitor C22, the other end of capacitor C21, the other end of capacitor C22, the pin 2 of chip U6, the other end of resistor R23, the other end of capacitor C12, the other end of capacitor C13 and the other end of capacitor C14 are grounded, the pin 5 of chip U6 is further electrically connected with the collector of triode Q1, one end of resistor R4 and one end of resistor R5 are electrically connected with the base of triode Q1, the other end of resistor R5 is electrically connected with the collector of triode Q2, one end of resistor R11 and one end of capacitor C10 are electrically connected with the base of triode Q2, the other end of capacitor C10 and the emitter of triode Q2 are grounded, the other end of resistor R11 is electrically connected with 12V_POW_EN power supply.

[0007] Preferably, the power supply control circuit further comprises MOS tube Q3 and triode Q4, the source of MOS tube Q3 is electrically connected with RoLa_+3V power supply, the gate of MOS tube Q3 is electrically connected with one end of resistor R36 and one end of resistor R37, the other end of resistor R36 and the drain of MOS tube Q3 are both electrically connected with the anode of power supply V, the other end of resistor R37 is electrically connected with the collector of triode Q4, one end of resistor R41 and one end of capacitor C34 are electrically connected with the base of triode Q4, the other end of capacitor C34 and the emitter of triode Q4 are grounded, the other end of resistor R41 is electrically connected with RoLa_POW power supply.

[0008] Preferably, the signal conversion circuit comprises an operational amplifier U8, one end of a capacitor C1 and one end of a capacitor C2 are electrically connected to pin 5 of the operational amplifier U8, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded, one end of a resistor R3 is electrically connected to pin 3 of the operational amplifier U8, one end of a resistor R10, one end of a resistor R12 and one end of a capacitor C11 are electrically connected to pin 4 of the operational amplifier U8, the other end of the resistor R10 is grounded, one end of a resistor R7, one end of a resistor R2, one end of a capacitor C7 and one end of an inductor ED1 are electrically connected to the other end of the resistor R3, the other end of the resistor R7, the other end of the capacitor C7 and the other end of the inductor ED1 are grounded, the other end of the resistor R2 is electrically connected to a signal input end IN1 of an external sensor, pin 2 of the operational amplifier U8 is grounded, the other end of the resistor R12 and the other end of the capacitor C11 are electrically connected to pin 1 of the operational amplifier U8, pin 1 of the operational amplifier U8 is electrically connected to the anode of a diode D1, one end of a resistor R6, one end of a resistor R13 and one end of a capacitor C8, the other end of the resistor R13 and the other end of the capacitor C8 are grounded, the other end of the resistor R6 is electrically connected to a SINGLE_OUT network, and the resistor R6 is electrically connected to an MCU single chip microcomputer through the SINGLE_OUT network.

[0009] Preferably, the power output protection circuit comprises an operational amplifier U11, one end of a resistor R74, one end of a resistor R76 and one end of a resistor R72 are electrically connected to pin 3 of the operational amplifier U11, the other end of the resistor R74 and the other end of the resistor R76 are grounded, the other end of the resistor R72 is electrically connected to one end of a resistor R68, one end of a resistor R69 and the source electrode of a MOS transistor Q6, one end of a resistor R70 is electrically connected to the drain electrode of the MOS transistor Q6, the other end of the resistor R70 is electrically connected to the gate electrode of the MOS transistor Q6, one end of a resistor R71 is electrically connected to the gate electrode of the MOS transistor Q6, the other end of the resistor R71 is electrically connected to the other end of the resistor R70, the other end of the resistor R71 is electrically connected to pin 1 of the operational amplifier U11, one end of a resistor R75 and one end of a resistor R73 are electrically connected to pin 4 of the operational amplifier U11, the other end of the resistor R75 and pin 2 of the operational amplifier U11 are grounded, the other end of the resistor R73 is electrically connected to the other end of the resistor R69, and the other end of the resistor R73 is also electrically connected to the anode of a diode D4.

[0010] Preferably, the MCU single chip microcomputer is a low-power single chip microcomputer, and the current when entering sleep is lower than 1uA.

[0011] Preferably, the resistor R69 is a sampling resistor.

[0012] Compared with the prior art, the utility model has the advantages of:

[0013] The utility model discloses a low -power MCU singlechip is adopted, cooperate the intermittent operation mode of wireless sensor, make the use time of lithium carbonate iron 3.3V battery increase, the accurate value of wireless sensor can be obtained through the conversion of signal conversion circuit to input signal, reduce error and the interference of signal, in addition adopt Lora wireless form and carry out the transmission of signal, guarantee the distance of signal transmission, and output power supply can shut off power output in time under the condition of short circuit, reduce the phenomenon that high current burns the internal circuit of equipment or causes external short -circuit spark, meet the requirement of intrinsic safety, thereby solve the power consumption problem, the distance problem of signal transmission and the problem of intrinsic safety, satisfy the use demand. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model discloses a kind of connection block diagram of intrinsic safety type mine wireless sensor proposed by the utility model;

[0015] Figure 2 The utility model discloses a kind of circuit diagram connected with chip U6 in power supply control circuit of intrinsic safety type mine wireless sensor proposed by the utility model;

[0016] Figure 3 The utility model discloses a kind of circuit diagram connected with MOS tube Q3 and triode Q4 in power supply control circuit of intrinsic safety type mine wireless sensor proposed by the utility model;

[0017] Figure 4 The utility model discloses a kind of circuit diagram of signal conversion circuit of intrinsic safety type mine wireless sensor proposed by the utility model;

[0018] Figure 5 The utility model discloses a kind of circuit diagram of power output protection circuit of intrinsic safety type mine wireless sensor proposed by the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Referring to Figures 1-5 A kind of intrinsic safety type mine wireless sensor, including MCU singlechip, power supply control circuit, signal conversion circuit, power output protection circuit, LORA module, voltage detection circuit and lithium carbonate iron 3.3V battery, MCU singlechip is electrically connected with power supply control circuit, signal conversion circuit, power output protection circuit, LORA module, voltage detection circuit and lithium carbonate iron 3.3V battery, signal conversion circuit and power output protection circuit are electrically connected with the signal input end of external sensor, wherein the current of MCU singlechip for low -power singlechip when entering dormancy is less than 1uA;

[0021] The power supply control circuit comprises a chip U6, a positive electrode of a diode D3 and one end of an inductor L1 are electrically connected to a pin 1 of the chip U6, the other end of the inductor L1 is electrically connected to a pin 5 of the chip U6, a negative electrode of the diode D3 is electrically connected to one end of a resistor R16, one end of a capacitor C12, one end of a capacitor C13 and one end of a capacitor C14, the other end of the resistor R16 is electrically connected to one end of a resistor R23, a pin 3 of the chip U6 is electrically connected to the one end of the resistor R23 and the other end of the resistor R16, the pin 5 and the pin 4 of the chip U6 are respectively electrically connected to one end of a capacitor C21 and one end of a capacitor C22, the other end of the capacitor C21, the other end of the capacitor C22, a pin 2 of the chip U6, the other end of the resistor R23, the other end of the capacitor C12, the other end of the capacitor C13 and the other end of the capacitor C14 are grounded, the pin 5 of the chip U6 is further electrically connected to a collector of a triode Q1, one end of a resistor R4 and one end of a resistor R5 are electrically connected to a base of the triode Q1, the other end of the resistor R5 is electrically connected to a collector of a triode Q2, one end of a resistor R11 and one end of a capacitor C10 are electrically connected to a base of the triode Q2, the other end of the capacitor C10 and an emitter of the triode Q2 are grounded, and the other end of the resistor R11 is electrically connected to a 12V_POW_EN power supply;

[0022] The power supply control circuit further comprises a MOS tube Q3 and a triode Q4, a source of the MOS tube Q3 is electrically connected to a RoLa_+3V power supply, a gate of the MOS tube Q3 is electrically connected to one end of a resistor R36 and one end of a resistor R37, the other end of the resistor R36 and a drain of the MOS tube Q3 are both electrically connected to a positive electrode of a power supply V, the other end of the resistor R37 is electrically connected to a collector of the triode Q4, one end of a resistor R41 and one end of a capacitor C34 are electrically connected to a base of the triode Q4, the other end of the capacitor C34 and an emitter of the triode Q4 are grounded, and the other end of the resistor R41 is electrically connected to a RoLa_POW power supply;

[0023] The signal conversion circuit comprises an operational amplifier U8, one end of a capacitor C1 and one end of a capacitor C2 are electrically connected to pin 5 of the operational amplifier U8, the other end of the capacitor C1 and the other end of the capacitor C2 are both grounded, one end of a resistor R3 is electrically connected to pin 3 of the operational amplifier U8, one end of a resistor R10, one end of a resistor R12 and one end of a capacitor C11 are electrically connected to pin 4 of the operational amplifier U8, the other end of the resistor R10 is grounded, one end of a resistor R7, one end of a resistor R2, one end of a capacitor C7 and one end of an inductor ED1 are electrically connected to the other end of the resistor R3, the other end of the resistor R7, the other end of the capacitor C7 and the other end of the inductor ED1 are all grounded, the other end of the resistor R2 is electrically connected to a signal input end IN1 of an external sensor, pin 2 of the operational amplifier U8 is grounded, the other end of the resistor R12 and the other end of the capacitor C11 are both electrically connected to pin 1 of the operational amplifier U8, the positive electrode of a diode D1, one end of a resistor R6, one end of a resistor R13 and one end of a capacitor C8 are electrically connected to pin 1 of the operational amplifier U8, the other end of the resistor R13 and the other end of the capacitor C8 are both grounded, the other end of the resistor R6 is electrically connected to a SINGLE_OUT network, and the resistor R6 is electrically connected to an MCU single-chip microcomputer through the SINGLE_OUT network.

[0024] The power output protection circuit comprises an operational amplifier U11, one end of a resistor R74, one end of a resistor R76 and one end of a resistor R72 are electrically connected to pin 3 of the operational amplifier U11, the other end of the resistor R74 and the other end of the resistor R76 are grounded, the other end of the resistor R72 is electrically connected to one end of a resistor R68, one end of a resistor R69 and a source electrode of a MOS tube Q6, one end of a resistor R70 is electrically connected to a drain electrode of the MOS tube Q6, the other end of the resistor R70 is electrically connected to a gate electrode of the MOS tube Q6, one end of a resistor R71 is electrically connected to the gate electrode of the MOS tube Q6, the other end of the resistor R71 is also electrically connected to the other end of the resistor R70, the other end of the resistor R71 is electrically connected to pin 1 of the operational amplifier U11, one end of a resistor R75 and one end of a resistor R73 are electrically connected to pin 4 of the operational amplifier U11, the other end of the resistor R75 and pin 2 of the operational amplifier U11 are grounded, the other end of the resistor R73 is electrically connected to the other end of the resistor R69, and the other end of the resistor R73 is also electrically connected to the anode of a diode D4, wherein the resistor R69 is a sampling resistor; the low-power MCU single-chip microcomputer is adopted, and the intermittent working mode of the wireless sensor is matched, so that the use time of the lithium carbonate iron 3.3V battery is increased, the input signal is converted through the signal conversion circuit, the accurate value of the wireless sensor can be obtained, the error and the interference of the signal are reduced, the Lora wireless form is adopted for signal transmission, the signal transmission distance is ensured, and in the case of short circuit, the power output can be turned off in time, the phenomenon that the internal circuit of the equipment is burned out by large current or external short-circuit spark is reduced, the requirement of intrinsic safety is met, and the problems of power consumption, signal transmission distance and intrinsic safety are solved, so that the use requirement is met.

[0025] Working principle: when in use, the opening and closing control of the power supply is performed through the 12V_POW_EN power supply and the Rola_POW power supply, the two pins are pulled low during sleep to disconnect the power supply of VCC and RoLa_+3V and enter a low-power state, and the two pins are set high during work to supply power and work, so that the intermittent working mode of the wireless sensor is adjusted, the longer the sleep time is, the longer the use time of the lithium carbonate iron 3.3V battery is, and the consumption of electric energy due to long-time work is avoided;

[0026] During work, the current passing through the resistor R7 generates a voltage drop, the larger the current is, the larger the voltage drop is, the voltage drop is processed by the operational amplifier U8, actual error circuit adjustment is performed, and then the voltage is judged by the MCU single-chip microcomputer through the SINGLE_OUT network, the relationship between the incoming current and voltage is a linear relationship, the size of the AD value is obtained according to the size of the wireless sensor value, so that the accurate value of the wireless sensor can be obtained, and the generation of error is reduced;

[0027] In addition, during the working process, the voltage outputted by the wireless sensor is sampled through the sampling resistor R69, and the voltage drop across the sampling resistor R69 is compared by the operational amplifier U11; under normal circumstances, the voltage at the negative terminal is higher than that at the positive terminal, the output pin 1 of the operational amplifier U11 always maintains a low level output, and the MOS tube Q6 maintains a conduction state under the condition that the gate is low, and does not affect the output of the voltage; when the output voltage is short-circuited to the ground, a large voltage drop across the sampling resistor R69 will be generated instantaneously, so that the voltage at the positive terminal of the operational amplifier U11 is higher than that at the negative terminal, the operational amplifier U11 will be converted from a low level to a high level output to the gate of the MOS tube Q6, so that the MOS tube Q6 is cut off and outputted, thereby protecting the generation of internal large current and external spark phenomenon, so as to achieve the purpose of shutting down the power supply in time when the short circuit occurs.

[0028] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An intrinsically safe mine wireless sensor, characterized by, The application relates to a power supply control circuit, which comprises an MCU single-chip microcomputer, a power supply control circuit, a signal conversion circuit, a power output protection circuit, an LORA module, a voltage detection circuit and a lithium carbonate 3.3V battery, wherein the MCU single-chip microcomputer is electrically connected with the power supply control circuit, the signal conversion circuit, the power output protection circuit, the LORA module, the voltage detection circuit and the lithium carbonate 3.3V battery; and the signal conversion circuit and the power output protection circuit are electrically connected with a signal input end of an external sensor.

2. The intrinsic safety type mine wireless sensor according to claim 1, characterized in that, The power supply control circuit comprises a chip U6, wherein one end of an inductor L1 and the anode of a diode D3 are electrically connected with a pin 1 of the chip U6; the other end of the inductor L1 is electrically connected with a pin 5 of the chip U6; the cathode of the diode D3 is electrically connected with one end of a resistor R16, one end of a capacitor C12, one end of a capacitor C13 and one end of a capacitor C14; one end of the resistor R23 is electrically connected with the other end of the resistor R16; a pin 3 of the chip U6 is electrically connected with one end of the resistor R23 and the other end of the resistor R16; one end of a capacitor C21 and one end of a capacitor C22 are respectively electrically connected with a pin 5 and a pin 4 of the chip U6; the other end of the capacitor C21, the other end of the capacitor C22, a pin 2 of the chip U6, the other end of the resistor R23, the other end of the resistor C12, the other end of the capacitor C13 and the other end of the capacitor C14 are grounded; the collector of a triode Q1 is electrically connected with the pin 5 of the chip U6; one end of a resistor R4 and one end of a resistor R5 are electrically connected with the base of the triode Q1; the collector of a triode Q2 is electrically connected with the other end of the resistor R5; one end of a resistor R11 and one end of a capacitor C10 are electrically connected with the base of the triode Q2; the other end of the capacitor C10 and the emitter of the triode Q2 are grounded; the other end of the resistor R11 is electrically connected with a 12V_POW_EN power supply.

3. The intrinsic safety type mine wireless sensor according to claim 1, characterized in that, The power supply control circuit further comprises a MOS tube Q3 and a triode Q4, wherein the source of the MOS tube Q3 is electrically connected with a RoLa_+3V power supply; one end of a resistor R36 and one end of a resistor R37 are electrically connected with the gate of the MOS tube Q3; the other end of the resistor R36 and the drain of the MOS tube Q3 are electrically connected with the anode of a power supply V; the other end of the resistor R37 is electrically connected with the collector of the triode Q4; one end of a resistor R41 and one end of a capacitor C34 are electrically connected with the base of the triode Q4; the other end of the capacitor C34 and the emitter of the triode Q4 are grounded; the other end of the resistor R41 is electrically connected with a RoLa_POW power supply.

4. The intrinsic safety type mine wireless sensor according to claim 1, characterized in that, The signal conversion circuit comprises an operational amplifier U8, one end of a capacitor C1 and one end of a capacitor C2 are electrically connected to pin 5 of the operational amplifier U8, the other end of the capacitor C1 and the other end of the capacitor C2 are both grounded, one end of a resistor R3 is electrically connected to pin 3 of the operational amplifier U8, one end of a resistor R10, one end of a resistor R12 and one end of a capacitor C11 are electrically connected to pin 4 of the operational amplifier U8, the other end of the resistor R10 is grounded, one end of a resistor R7, one end of a resistor R2, one end of a capacitor C7 and one end of an inductor ED1 are electrically connected to the other end of the resistor R3, the other end of the resistor R7, the other end of the capacitor C7 and the other end of the inductor ED1 are all grounded, the other end of the resistor R2 is electrically connected to a signal input end IN1 of an external sensor, pin 2 of the operational amplifier U8 is grounded, the other end of the resistor R12 and the other end of the capacitor C11 are both electrically connected to pin 1 of the operational amplifier U8, pin 1 of the operational amplifier U8 is electrically connected to the anode of a diode D1, one end of a resistor R6, one end of a resistor R13 and one end of a capacitor C8, the other end of the resistor R13 and the other end of the capacitor C8 are both grounded, the other end of the resistor R6 is electrically connected to a SINGLE_OUT network, and the resistor R6 is electrically connected to an MCU single-chip microcomputer through the SINGLE_OUT network.

5. The intrinsic safety type mine wireless sensor according to claim 1, characterized in that, The power output protection circuit comprises an operational amplifier U11, one end of a resistor R74, one end of a resistor R76 and one end of a resistor R72 are electrically connected to pin 3 of the operational amplifier U11, the other end of the resistor R74 and the other end of the resistor R76 are both grounded, the other end of the resistor R72 is electrically connected to one end of a resistor R68, one end of a resistor R69 and the source electrode of a MOS transistor Q6, one end of a resistor R70 is electrically connected to the drain electrode of the MOS transistor Q6, the other end of the resistor R70 is electrically connected to the gate electrode of the MOS transistor Q6, one end of a resistor R71 is electrically connected to the gate electrode of the MOS transistor Q6, the other end of the resistor R71 is also electrically connected to the other end of the resistor R70, the other end of the resistor R71 is electrically connected to pin 1 of the operational amplifier U11, one end of a resistor R75 and one end of a resistor R73 are electrically connected to pin 4 of the operational amplifier U11, the other end of the resistor R75 and pin 2 of the operational amplifier U11 are both grounded, the other end of the resistor R73 is electrically connected to the other end of the resistor R69, and the other end of the resistor R73 is also electrically connected to the anode of a diode D4.

6. The intrinsic safety type mine wireless sensor according to claim 1, characterized in that, The MCU single-chip microcomputer is a low-power single-chip microcomputer, and the current when the MCU single-chip microcomputer enters sleep is lower than 1uA.

7. The intrinsic safety type mine wireless sensor according to claim 5, characterized in that, The resistor R69 is a sampling resistor.

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