CN215641549U

CN215641549U - Explosion-proof detection device

Info

Publication number: CN215641549U
Application number: CN202121154442.3U
Authority: CN
Inventors: 吴连玉
Original assignee: Shenzhen Yihua Times Intelligent Automation System Co ltd; Shenzhen Yihua Computer Technology Co ltd; Shenzhen Yihua Computer Co Ltd
Current assignee: Shenzhen Yihua Times Intelligent Automation System Co ltd; Shenzhen Yihua Computer Technology Co ltd; Shenzhen Yihua Computer Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-25
Anticipated expiration: 2031-05-26

Abstract

The embodiment of the utility model provides an explosion-proof detection device, which comprises a plurality of sensors, an explosion-proof alarm control module and an alarm module; the explosion-proof alarm control module comprises a signal input circuit, a signal conversion circuit and a signal control circuit, the sensor is connected with the signal input circuit, and the alarm module is connected with the signal control circuit. In the embodiment of the utility model, a plurality of different sensors can be adopted to detect the environmental state of the explosion-proof equipment to generate a plurality of detection signals, and the explosion-proof alarm control module converts the plurality of detection signals into the switching signals to control the alarm module to give out an alarm, so that various damage means of criminals to the explosion-proof equipment can be more comprehensively prevented, the explosion-proof requirement of the explosion-proof equipment is met, and the safety performance of the explosion-proof equipment is improved.

Description

Explosion-proof detection device

Technical Field

The utility model relates to the technical field of explosion prevention, in particular to an explosion-proof detection device.

Background

With the development of unmanned business scenes such as smart banks, unmanned supermarkets and the like, the explosion-proof requirement on self-service equipment is higher and higher, for example, for financial equipment for handling cash, cash in the financial equipment is stored in a cash box of a lower box safe in the financial equipment, and criminals usually open the safe in a high-temperature cutting and physical destruction mode and take away the cash box. Therefore, in order to avoid causing serious economic loss, corresponding safety protection and alarm measures are generally adopted on the financial equipment.

At present, the safety protection and alarm measures adopted for explosion-proof equipment are that a single sensor is connected with an alarm module, and when the explosion-proof equipment is detected to be damaged through the sensor, the alarm module gives an alarm to achieve the protection effect. However, the above protection measures are too simple, only a single damage mode aiming at the explosion-proof equipment can be detected, and the crime prevention can not be comprehensively carried out; the reliability is low, and after the single sensor fails, the whole detection device loses the precaution effect.

Disclosure of Invention

In view of the above, embodiments of the present invention are proposed in order to provide an explosion proof detection apparatus that overcomes or at least partially solves the above problems.

In order to solve the problems, the embodiment of the utility model discloses an explosion-proof detection device, which comprises a plurality of sensors, an explosion-proof alarm control module and an alarm module; the explosion-proof alarm control module comprises a signal input circuit, a signal conversion circuit and a signal control circuit, the sensor is connected with the signal input circuit, and the alarm module is connected with the signal control circuit;

the sensors are used for sensing the environment state of the explosion-proof equipment to generate a plurality of detection signals;

the signal input circuit is used for converting the detection signals into level signals;

the signal conversion circuit is used for converting the plurality of level signals into switching signals;

the signal control circuit is used for controlling the alarm module to give an alarm based on the switch signal.

Optionally, the plurality of sensors includes a first sensor and a second sensor, and the signal input circuit includes a first sensor interface, a second sensor interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;

the first sensor is connected with the first sensor interface, the first resistor, the third resistor and the first capacitor are connected in series and are connected between a power supply voltage and a ground wire, one end of the first sensor interface is connected to a series point of the first resistor and the third resistor, and the other end of the first sensor interface is connected to the ground wire;

the second sensor is connected with the second sensor interface, the second resistor, the fourth resistor and the second capacitor are connected in series and in parallel between the power supply voltage and the ground wire, one end of the second sensor interface is connected with a series point of the second resistor and the fourth resistor, and the other end of the second sensor interface is connected with the ground wire.

Optionally, the plurality of sensors includes a third sensor and a fourth sensor, and the signal input circuit includes a third sensor interface, a fourth sensor interface, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a fourth capacitor, a first inverter, and a second inverter;

the third sensor is connected with the third sensor interface, the fifth resistor, the seventh resistor and the third capacitor are connected in series and are connected between a power supply voltage and a ground wire in parallel, one end of the third sensor interface is connected to a series point of the fifth resistor and the seventh resistor, the other end of the third sensor interface is connected to the ground wire, and a series point of the seventh resistor and the third capacitor is connected to the input end of the first inverter;

the fourth sensor is connected with the fourth sensor interface, the sixth resistor, the eighth resistor and the fourth capacitor are connected in series and in parallel between the power supply voltage and the ground wire, one end of the fourth sensor interface is connected with the series point of the sixth resistor and the eighth resistor, the other end of the fourth sensor interface is connected with the ground wire, and the series point of the eighth resistor and the fourth capacitor is connected with the input end of the second phase inverter.

Optionally, the first sensor and the second sensor are normally closed sensors, and the third sensor and the fourth sensor are normally open sensors;

when the first sensor, the second sensor, the third sensor and the fourth sensor are not triggered, the first sensor and the second sensor maintain a closed state, the third sensor and the fourth sensor maintain an open state, and the plurality of level signals output by the signal input circuit are low level signals;

when the first sensor, the second sensor, the third sensor and the fourth sensor are triggered, the first sensor and the second sensor jump to be in an open state, the third sensor and the fourth sensor jump to be in a closed state, and the plurality of level signals output by the signal input circuit are high level signals.

Optionally, the signal conversion circuit includes a first or gate, a second or gate, and a third or gate;

a first input end and a second input end of the first or gate are respectively connected with a series point of the third resistor and the first capacitor and a series point of the fourth resistor and the second capacitor;

a first input end and a second input end of the second OR gate are respectively connected with an output end of the first phase inverter and an output end of the second phase inverter;

the first input and the second input of the third or-gate are connected to the output of the first or-gate and the output of the second or-gate, respectively.

Optionally, when there is a high level signal in the plurality of level signals output by the signal input circuit, the signal conversion circuit outputs the switching signal as a high level signal;

when the plurality of level signals output by the signal input circuit are all the low level signals, the signal conversion circuit outputs a switching signal which is a low level signal.

Optionally, the signal control circuit includes a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor, a first field-effect transistor, a second field-effect transistor, and an alarm module interface;

the ninth resistor and the tenth resistor are connected in series and connected in parallel between the output end of the third OR gate and the grid electrode of the first field effect transistor, the source electrode of the first field effect transistor is connected with the ground wire, the eleventh resistor is connected between the drain electrode of the first field effect transistor and the grid electrode of the second field effect transistor, the twelfth resistor and the fifth capacitor are connected in parallel between the power supply voltage and the grid electrode of the second field effect transistor, one end of the alarm module interface is connected with the drain electrode of the second field effect transistor, the other end of the alarm module interface is connected with the ground wire, and the alarm module interface is connected with the alarm module.

Optionally, when the signal conversion circuit outputs the switching signal of the high level signal, the first field effect transistor is turned on, the gate of the second field effect transistor inputs the low level signal, the second field effect transistor is turned on, and the alarm module interface is connected to the power supply voltage, so that the alarm module connected to the alarm module interface sends out an alarm.

When the signal conversion circuit outputs the switching signal which is a low level signal, the first field effect tube is disconnected, a high level signal is input to the grid electrode of the second field effect tube, the second field effect tube is disconnected, and the alarm module interface is disconnected with the power supply voltage, so that the alarm module connected with the alarm module interface stops giving an alarm.

Optionally, the signal input circuit includes a connector, and the connector includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a jumper;

the first corner of the connector is connected with a series point of the first resistor and the third resistor, the second corner of the connector is connected with a series point of the second resistor and the fourth resistor, and the third corner and the fourth corner of the connector are connected with the ground wire;

when the first sensor interface and the second sensor interface are not connected with the first sensor and the second sensor, the first connecting angle and the second connecting angle are respectively connected with the third connecting angle and the fourth connecting angle through the jumper wire, so that the level signals output by the signal input circuit are all low level signals when the third sensor and the fourth sensor are not triggered.

Optionally, the signal control circuit includes a dial switch, and the dial switch includes a dial key, a first terminal, a second terminal, a third terminal, and a fourth terminal;

the third terminal of the dial switch is connected with the ground wire, and the first terminal is connected with a series point of the ninth resistor and the tenth resistor;

when the dial key is dialed to the third terminal, the dial switch is switched on, the grid electrode of the first field effect tube is connected with the ground wire, the first field effect tube is switched off, the grid electrode of the second field effect tube inputs a high level signal, the second field effect tube is switched off, and the alarm module interface is disconnected with the power supply voltage, so that the alarm module connected with the alarm module interface stops giving an alarm.

The embodiment of the utility model discloses an explosion-proof detection device, which comprises a plurality of sensors, a signal input circuit, a single chip microcomputer, a communication unit, an alarm interface, an alarm module driving unit and an alarm module, wherein the single chip microcomputer is connected with the alarm module driving unit; the sensors are connected with the signal input circuit, and the single chip microcomputer is respectively connected with the signal input circuit, the communication unit, the alarm interface and the alarm module driving unit;

the single chip microcomputer is used for converting the plurality of level signals into switching signals;

the alarm module driving unit is used for controlling the alarm module to give an alarm based on the switch signal;

the alarm interface is used for connecting an alarm system and sending the switch signal to the alarm system;

the communication unit is used for being connected with an industrial personal computer of the explosion-proof equipment so that the industrial personal computer of the explosion-proof equipment can monitor the states of the sensors and configure an alarm mode.

The embodiment of the utility model has the following advantages: the sensor inputs a plurality of detection signals generated by sensing the environmental state of the explosion-proof equipment into the signal input circuit, the signal input circuit converts the detection signals generated by the sensor into a plurality of level signals and inputs the level signals into the signal conversion circuit, the signal conversion circuit converts the level signals into switching signals and inputs the switching signals into the signal control circuit, and the signal control circuit controls the alarm module to give an alarm based on the switching signals. In the embodiment of the utility model, a plurality of different sensors can be adopted to detect the environmental state of the explosion-proof equipment to generate a plurality of detection signals, and the explosion-proof alarm control module converts the plurality of detection signals into the switching signals to control the alarm module to give out an alarm, so that various damage means of criminals to the explosion-proof equipment can be more comprehensively prevented, the explosion-proof requirement of the explosion-proof equipment is met, and the safety performance of the explosion-proof equipment is improved.

Meanwhile, the explosion-proof detection device has higher reliability, and after a certain sensor fails, other sensors which do not fail also play a role in preventing criminals from damaging, so that the phenomenon that the whole device loses the prevention function due to the failure of the sensor if the explosion-proof detection device only has a single sensor is avoided.

Drawings

FIG. 1 is a block schematic diagram of a prior art explosion proof detection apparatus;

FIG. 2 is a schematic block diagram of an explosion proof detection apparatus of the present invention;

FIG. 3 is a schematic diagram of an explosion-proof alarm control module of the present invention;

fig. 4 is a schematic block diagram of another explosion-proof detection device of the present invention.

Reference numerals:

j1-a first sensor interface, J2-a second sensor interface, J3-a third sensor interface, J4-a fourth sensor interface, and J5-an alarm module interface;

r1-a first resistor, R2-a second resistor, R3-a third resistor, R4-a fourth resistor, R5-a fifth resistor, R6-a sixth resistor, R7-a seventh resistor, R8-an eighth resistor, R9-a ninth resistor, R10-a tenth resistor, R11-an eleventh resistor, and R12-a twelfth resistor;

c1-first capacitor, C2-second capacitor, C3-third capacitor, C4-fourth capacitor, C5-fifth capacitor;

U1A-first inverter, U1B-second inverter, U2A-first or gate, a 1-first input of first or gate, a 2-second input of first or gate, a 3-second output of first or gate, U2B-second or gate, b 1-first input of second or gate, b 2-second input of second or gate, b 3-output of second or gate, U2C-third or gate, c 1-first input of third or gate, c 2-second input of third or gate, c 3-output of third or gate;

q1-a first field effect transistor, G1-a gate of the first field effect transistor, S1-a source of the first field effect transistor, D1-a drain of the first field effect transistor, Q2-a second field effect transistor, G2-a gate of the second field effect transistor, S2-a source of the second field effect transistor, D2-a drain of the second field effect transistor;

JP 1-connector, 1-first corner, 2-second corner, 3-third corner, 4-fourth corner;

u3-toggle, U1-first terminal, U2-second terminal, U3-third terminal, U4-fourth terminal.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1, which is a schematic block diagram of an explosion-proof detection apparatus in the prior art, as can be seen, the explosion-proof detection apparatus is composed of an explosion-proof detection sensor and an alarm, after a power supply supplies power to the explosion-proof detection sensor and the alarm, the explosion-proof detection sensor, which may be a high-temperature sensor for preventing cutting or a vibration sensor for preventing physical explosion, outputs a switching signal when a detection parameter reaches a detection threshold. The alarm inputs a switch signal and outputs an alarm sound for setting time limit according to the signal state, however, the explosion-proof detection device is too simple, only can detect a single damage mode aiming at the safety box, and cannot comprehensively prevent various damage means of criminals aiming at the safety box.

In order to solve the above problems, referring to fig. 2, a schematic block diagram of an explosion-proof detection device of the present invention is shown, and as can be seen, the explosion-proof detection device of the present invention includes a plurality of sensors, an explosion-proof alarm control module and an alarm module; the explosion-proof alarm control module comprises a signal input circuit, a signal conversion circuit and a signal control circuit, the sensor is connected with the signal input circuit, and the alarm module is connected with the signal control circuit;

With the development of unmanned business scenes such as intelligent banks, unmanned supermarkets and the like, the explosion-proof requirement on self-service equipment is higher and higher

The anti-explosion equipment can be cash processing equipment and cash or important article storage equipment in a smart bank, such as a cash deposit machine, a cash dispenser, a cash recycling machine, a safe and the like, and can also be self-service equipment in an unmanned supermarket and a public place; the sensor is an explosion-proof detection sensor consisting of an environmental parameter detection sensor and a detection signal output unit, the environmental parameter detection sensor can be a temperature detection sensor, a vibration detection sensor and the like, and the explosion-proof detection sensor can be divided into a normally open type and a normally closed type according to the output state; the alarm module can warn by adopting various modes such as sound, warning light or vibration, and the embodiment of the utility model takes the alarm module consisting of a loudspeaker and a timing relay as an example for explanation.

Specifically, a plurality of detection signals generated by sensing the environment state of the explosion-proof equipment are input into a signal input circuit by a plurality of sensors, the detection signals generated by the sensors are converted into a plurality of level signals by the signal input circuit and input into a signal conversion circuit, the level signals are converted into switching signals by the signal conversion circuit and input into a signal control circuit, and the signal control circuit controls an alarm module to give an alarm based on the switching signals.

In the embodiment of the utility model, a plurality of different sensors can be adopted to detect the environmental state of the explosion-proof equipment to generate a plurality of detection signals, and the detection signals are converted into the switching signals through the explosion-proof alarm control module to control the alarm module to give out an alarm, so that various damage means of criminals to the explosion-proof equipment can be more comprehensively prevented, the explosion-proof requirement of the explosion-proof equipment is met, and the safety performance of the explosion-proof equipment is improved;

Referring to fig. 3, which shows a schematic diagram of an explosion-proof alarm control module of the present invention, as can be seen, the plurality of sensors include a first sensor and a second sensor, and the signal input circuit includes a first sensor interface J1, a second sensor interface J2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, and a second capacitor C2; the first sensor is connected with the first sensor interface J1, the first resistor R1, the third resistor R3 and the first capacitor C1 are connected in series and are connected between a power supply voltage and a ground wire, one end of the first sensor interface J1 is connected to the series connection point of the first resistor R1 and the third resistor R3, and the other end of the first sensor interface J1 is connected with the ground wire; the second sensor is connected with the second sensor interface J2, the second resistor R2, the fourth resistor R4 and the second capacitor C2 are connected in series and in parallel between the power voltage and the ground line, one end of the second sensor interface J2 is connected with the series point of the second resistor R2 and the fourth resistor R4, and the other end of the second sensor interface J2 is connected with the ground line.

In an embodiment of the present invention, the plurality of sensors includes a third sensor and a fourth sensor, and the signal input circuit includes a third sensor interface J3, a fourth sensor interface J4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a third capacitor C3, a fourth capacitor C4, a first inverter U1A, and a second inverter U1B; the third sensor is connected to the third sensor interface J3, the fifth resistor R5, the seventh resistor R7 and the third capacitor C3 are connected in series and in parallel between a power supply voltage and a ground, one end of the third sensor interface J3 is connected to a series point of the fifth resistor R5 and the seventh resistor R7, the other end of the third sensor interface J3 is connected to the ground, and a series point of the seventh resistor R7 and the third capacitor C3 is connected to an input end of the first inverter U1A; the fourth sensor is connected with a fourth sensor interface J4, the sixth resistor R6, the eighth resistor R8 and the fourth capacitor C4 are connected in series and in parallel between the power voltage and the ground line, one end of the fourth sensor interface J4 is connected with a series point of the sixth resistor R6 and the eighth resistor R8, the other end of the fourth sensor interface J4 is connected with the ground line, and a series point of the eighth resistor R8 and the fourth capacitor C4 is connected with an input end of the second inverter U1B.

In an embodiment of the present invention, the first sensor and the second sensor are normally closed sensors, and the third sensor and the fourth sensor are normally open sensors; when the first sensor, the second sensor, the third sensor and the fourth sensor are not triggered, the first sensor and the second sensor maintain a closed state, the third sensor and the fourth sensor maintain an open state, and the plurality of level signals output by the signal input circuit are low level signals;

The inverter is also called a not circuit, an inverter, a logic negation circuit, and is a basic unit of a logic circuit. The not gate has an input and an output. When the input end of the power supply is at a high level, the output end is at a low level, and when the input end of the power supply is at a low level, the output end is at a high level; the first resistor R1, the second resistor R2, the fifth resistor R5 and the sixth resistor R6 are pull-up resistors.

Specifically, the first sensor and the second sensor are normally closed sensors, when the first sensor and the second sensor are not triggered, the outputs of the first sensor and the second sensor are in a closed state, a series point of a first resistor R1 and a third resistor R3 and a series point of a second resistor R2 and a fourth resistor R4 are connected with a ground wire, and after the ground wire is pulled up by the first resistor R1 and the second resistor R2, level signals input to a first input end a1 and a second input end a2 of the first or gate are in a low level; when the first sensor and the second sensor are triggered, the outputs of the first sensor and the second sensor are in an off state, and after the outputs of the first sensor and the second sensor are pulled up by the first resistor R1 and the second resistor R2, the level signals input to the first input end a1 and the second input end a2 of the first OR gate are in a high level;

the third sensor and the fourth sensor are normally open sensors, when the third sensor and the fourth sensor are not triggered, the outputs of the third sensor and the fourth sensor are in an off state, and after being pulled up by the first resistor R1 and the second resistor R2, high-level signals are respectively input to the input end of the first inverter U1A and the input end of the second inverter U1B, so that the level signals input to the first input end b1 and the second input end b2 of the second OR gate by the first inverter U1A and the second inverter U1B are low-level signals; when the third sensor and the fourth sensor are triggered, the outputs of the third sensor and the fourth sensor are in a closed state, and after being pulled up by the first resistor R1 and the second resistor R2, the low-level signals are respectively input to the input end of the first inverter U1A and the input end of the second inverter U1B, so that the level signals input to the first input end b1 and the second input end b2 of the second or gate by the first inverter U1A and the second inverter U1B are high-level signals.

Referring to fig. 3, the signal conversion circuit includes a first or gate U2A, a second or gate U2B, a third or gate U2C; the first input terminal a1 and the second input terminal b2 of the first or gate are respectively connected with the series point of the third resistor R3 and the first capacitor C1 and the series point of the fourth resistor R4 and the second capacitor C2; the first input b1 and the second input b2 of the second or gate are connected with the output of the first inverter U1A and the output of the second inverter U1B, respectively; the first input c1 and the second input c2 of the third or-gate are connected to the second output a3 of the first or-gate and the output of the second or-gate U2B, respectively.

In an embodiment of the present invention, when there is a high level signal in the plurality of level signals output by the signal input circuit, the signal conversion circuit outputs the switching signal as a high level signal; when the plurality of level signals output by the signal input circuit are all the low level signals, the signal conversion circuit outputs a switching signal which is a low level signal.

The OR gate is also called an OR circuit and a logic and circuit, the OR gate is provided with a plurality of input ends and an output end, and the output end is high level as long as one of the input ends is high level; the output is low only if all inputs are low.

Specifically, when the level signals input to the first input terminal a1 and the second input terminal a2 of the first or gate and the first input terminal b1 and the second input terminal b2 of the second or gate are both at a low level, the output terminal of the third or gate U2C outputs a switching signal at a low level; when the level signals input by the first input terminal a1 and the second input terminal a2 of the first or gate and the first input terminal b1 and the second input terminal b2 of the second or gate have a high level, the output terminal of the third or gate U2C outputs a switching signal with a high level.

Referring to fig. 3, the signal control circuit includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fifth capacitor C5, a first fet Q1, a second fet Q2, and an alarm module interface J5; the ninth resistor R9 and the tenth resistor R10 are connected in series and connected in parallel between the output end of the third OR gate U2C and the gate G1 of the first field effect transistor, the source S1 of the first field effect transistor is connected with the ground wire, the eleventh resistor R11 is connected between the drain D1 of the first field effect transistor and the gate G2 of the second field effect transistor, the twelfth resistor R12 and the fifth capacitor C5 are connected in parallel between the power supply voltage and the gate G2 of the second field effect transistor, one end of the alarm module interface J5 is connected with the drain D2 of the second field effect transistor, the other end of the alarm module interface J5 is connected with the ground wire, and the alarm module interface J5 is connected with the alarm module.

In an embodiment of the present invention, when the signal conversion circuit outputs the switching signal of the high level signal, the first fet Q1 is turned on, the gate G2 of the second fet inputs the low level signal, the second fet Q2 is turned on, and the alarm module interface J5 is connected to the power supply voltage, so that the alarm module connected to the alarm module interface J5 sends an alarm. When the signal conversion circuit outputs the switching signal which is a low level signal, the first field effect transistor Q1 is disconnected, the grid G2 of the second field effect transistor inputs a high level signal, the second field effect transistor Q2 is disconnected, and the alarm module interface J5 is disconnected with the power supply voltage, so that the alarm module connected with the alarm module interface J5 stops giving an alarm.

The field effect transistor is divided into a JFET (junction field effect transistor) and a MOS transistor (insulated gate field effect transistor), and the MOS transistor is divided into a PMOS transistor and an NMOS transistor, the first field effect transistor Q1 adopts an NMOS transistor, and the second field effect transistor Q2 adopts a PMOS transistor as an example for description, but not limited thereto, and the PMOS transistor and the NMOS transistor both include a gate, a drain, and a source. For the PMOS tube, when the grid electrode inputs a high level, the PMOS tube is conducted, namely the drain electrode and the source electrode are conducted, and when the grid electrode inputs a low level, the PMOS tube is disconnected, namely the drain electrode and the source electrode are disconnected; for an NMOS transistor, when a grid electrode inputs a high level, a PMOS transistor is disconnected, namely a drain electrode and a source electrode are disconnected, and when the grid electrode inputs a low level, the PMOS transistor is connected, namely the drain electrode and the source electrode are connected.

Specifically, when the output end of the third or gate U2C outputs a switching signal of a high level signal to the gate G1 of the first field effect transistor, the first field effect transistor Q1 is turned on, the end of the eleventh resistor R11 connected to the drain D1 of the first field effect transistor is grounded, so that the gate G2 of the second field effect transistor inputs a low level signal, the second field effect transistor Q2 is turned on, the alarm module interface J5 is connected to the power supply voltage, and after the timing relay in the alarm module is powered on, the speaker in the alarm module is made to emit an alarm sound at a predetermined time;

when the output end of the third or gate U2C outputs a switching signal of a low level signal to the grid G1 of the first field effect transistor, the first field effect transistor Q1 is disconnected, so that the grid G2 of the second field effect transistor inputs a high level signal, the second field effect transistor Q2 is disconnected, the alarm module interface J5 is disconnected with the power supply voltage, and after the timing relay in the alarm module is disconnected from the power supply, the loudspeaker in the alarm module stops giving an alarm sound.

Referring to fig. 3, the signal input circuit includes a connector JP1, the connector JP1 includes a first corner 1, a second corner 2, a third corner 3, a fourth corner 4, and a jumper wire; the first corner 1 of the connector JP1 is connected with the series point of the first resistor R1 and the third resistor R3, the second corner 2 of the connector JP1 is connected with the series point of the second resistor R2 and the fourth resistor R4, and the third corner 3 and the fourth corner 4 of the connector JP1 are connected with the ground wire; when the first sensor interface J1 and the second sensor interface J2 are not connected with the first sensor and the second sensor, the first corner 1 and the second corner 2 are respectively connected with the third corner 3 and the fourth corner 4 through the jumper wires, so that the plurality of level signals output by the signal input circuit are all low-level signals when the third sensor and the fourth sensor are not triggered.

When the first sensor and the second sensor are not connected with the first sensor interface J1 and the second sensor interface J2, the first sensor interface J1 and the second sensor interface J2 are in an off state, and after being pulled up by the first resistor R1 and the second resistor R2, the level signals input to the first input end a1 and the second input end a2 of the first or gate are at a high level, so that the high-level switching signal output by the output end c3 of the third or gate causes the alarm module to generate an alarm, and the detection of other sensors is influenced.

Specifically, in order to prevent the above problem from occurring, the series connection point of the first resistor R1 and the third resistor R3 may be connected through the first corner 1 and the second corner 2 of the connector JP1, the series connection point of the second corner 2 and the second resistor R2 and the fourth resistor R4 of the connector JP1, and when the first sensor and the second sensor are not connected to the first sensor interface J1 and the second sensor, the first corner 1 and the second corner 2 are connected to the third corner 3 and the fourth corner 4, respectively, by jumpers, so that when the third sensor and the fourth sensor are not activated, the level signals input to the first input terminal a1 and the second input terminal a2 of the first or gate are low level signals to prevent the sensor interface not connected to the sensor from affecting the use of the explosion-proof detection apparatus.

Referring to fig. 3, the signal control circuit includes a dip switch U3, the dip switch U3 includes a dip key, a first terminal U1, a second terminal U2, a third terminal U3 and a fourth terminal U4; the third terminal U3 of the dial switch U3 is connected with the ground wire, and the first terminal U1 is connected with the series point of the ninth resistor R9 and the tenth resistor R10; when the dial key is dialed to the third terminal U3, the dial switch U3 is turned on, the grid G1 of the first field effect transistor is connected with the ground wire, the first field effect transistor Q1 is disconnected, a high level signal is input into the grid G2 of the second field effect transistor, the second field effect transistor Q2 is disconnected, and the alarm module interface J5 is disconnected with the power voltage connection, so that the alarm module connected with the alarm module interface J5 stops giving an alarm.

Specifically, the explosion-proof detection device has sent out the alarm sound or maintained, the staff knows the explosion-proof equipment emergence situation or does not need explosion-proof detection device to send out the alarm sound this moment, then can be through dialling the key of dial switch U3, make first terminal U1 be connected with third terminal U3, the grid G1 of first field effect transistor connects the ground wire, first field effect transistor Q1 disconnection, the grid G2 input high level signal of second field effect transistor, second field effect transistor Q2 disconnection, alarm module interface J5 and mains voltage are connected the disconnection, so that the alarm module who connects alarm module interface J5 stops sending out the police dispatch newspaper, thereby guarantee that alarm module no longer sends out the police dispatch newspaper, be convenient for the staff to carry out maintenance work.

Referring to fig. 4, a schematic block diagram of another explosion-proof detection apparatus according to the present invention is shown, and as can be seen, the explosion-proof detection apparatus includes a plurality of sensors, a signal input circuit, a single chip, a communication unit, an alarm interface, an alarm module driving unit, and an alarm module; the sensors are connected with the signal input circuit, and the single chip microcomputer is respectively connected with the signal input circuit, the communication unit, the alarm interface and the alarm module driving unit; the sensors are used for sensing the environment state of the explosion-proof equipment to generate a plurality of detection signals; the signal input circuit is used for converting the detection signals into level signals; the single chip microcomputer is used for converting the plurality of level signals into switching signals; the alarm module driving unit is used for controlling the alarm module to give an alarm based on the switch signal; the alarm interface is used for connecting an alarm system and sending the switch signal to the alarm system; the communication unit is used for being connected with an industrial personal computer of the explosion-proof equipment so that the industrial personal computer of the explosion-proof equipment can monitor the states of the sensors and configure an alarm mode.

The alarm system can be a public security alarm system or an alarm system of a company device where the explosion-proof equipment is located. Specifically, a plurality of detection signals generated by sensing the environmental state of the explosion-proof equipment are input into a signal input circuit by a plurality of sensors, the signal input circuit converts a plurality of detection signals generated by the plurality of sensors into a plurality of level signals and a single chip microcomputer, the single chip microcomputer converts the plurality of level signals into switch signals and sends the switch signals to an alarm interface so as to send the switch signals to an alarm system, and meanwhile, an alarm module driving unit controls an alarm module to give an alarm based on the switch signals.

In the embodiment of the utility model, a plurality of different sensors can be adopted to detect the environmental state of the explosion-proof equipment to generate a plurality of detection signals, and the plurality of detection signals are converted into the switching signals through the singlechip to control the alarm module to give out an alarm, so that various destruction means of criminals aiming at the explosion-proof equipment can be more comprehensively prevented, the explosion-proof requirement of the explosion-proof equipment is met, and the safety performance of the explosion-proof equipment is improved;

meanwhile, the explosion-proof detection device has higher reliability, and after a certain sensor fails, other sensors which do not fail also play a role in preventing criminals from damaging, so that the phenomenon that the whole device loses the prevention function due to the failure of the sensor if the explosion-proof detection device only has a single sensor is avoided;

the utility model also has good flexibility, and can set the alarm mode of the explosion-proof detection device according to the needs of users, for example, the alarm module can send out alarm sound and send switch signals to the alarm system for alarming, or only the alarm module can send out alarm sound, or only the switch signals can send the alarm system for alarming.

The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The explosion-proof detection device provided by the utility model is described in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An explosion-proof detection device is characterized by comprising a plurality of sensors, an explosion-proof alarm control module and an alarm module; the explosion-proof alarm control module comprises a signal input circuit, a signal conversion circuit and a signal control circuit, the sensor is connected with the signal input circuit, and the alarm module is connected with the signal control circuit;

2. The explosion-proof detection device of claim 1 wherein the plurality of sensors includes a first sensor and a second sensor, the signal input circuit includes a first sensor interface, a second sensor interface, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, and a second capacitor;

3. The explosion proof detection device of claim 2 wherein the plurality of sensors includes a third sensor and a fourth sensor, the signal input circuit includes a third sensor interface, a fourth sensor interface, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a third capacitor, a fourth capacitor, a first inverter, and a second inverter;

4. The explosion proof detection device of claim 3 wherein said first and second sensors are normally closed sensors and said third and fourth sensors are normally open sensors;

5. The explosion proof detection device of claim 4, wherein the signal conversion circuit comprises a first OR gate, a second OR gate, a third OR gate;

6. The explosion proof detection apparatus of claim 5,

when there is a high level signal in the plurality of level signals output by the signal input circuit, the signal conversion circuit outputs the switching signal as a high level signal;

7. The explosion-proof detection device of claim 6, wherein the signal control circuit comprises a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a fifth capacitor, a first field effect transistor, a second field effect transistor and an alarm module interface;

8. The explosion proof detection apparatus of claim 7,

when the signal conversion circuit outputs the switching signal which is a high level signal, the first field effect transistor is conducted, a low level signal is input to the grid electrode of the second field effect transistor, the second field effect transistor is conducted, and the alarm module interface is connected with the power supply voltage, so that the alarm module connected with the alarm module interface gives an alarm;

9. The explosion proof detection device of claim 3 wherein the signal input circuit comprises a connector comprising a first corner, a second corner, a third corner, a fourth corner and a jumper;

10. The explosion-proof detection device of claim 8, wherein the signal control circuit comprises a dip switch, the dip switch comprising a dip key, a first terminal, a second terminal, a third terminal, and a fourth terminal;

11. An explosion-proof detection device is characterized by comprising a plurality of sensors, a signal input circuit, a single chip microcomputer, a communication unit, an alarm interface, an alarm module driving unit and an alarm module; the sensors are connected with the signal input circuit, and the single chip microcomputer is respectively connected with the signal input circuit, the communication unit, the alarm interface and the alarm module driving unit;