CN220439029U

CN220439029U - Gas detector

Info

Publication number: CN220439029U
Application number: CN202322118694.6U
Authority: CN
Inventors: 邓先付; 王秋桂; 沈红波
Original assignee: Shenzhen Pilot Guards Safety Technology Co ltd
Current assignee: Shenzhen Pilot Guards Safety Technology Co ltd
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2024-02-02
Anticipated expiration: 2033-08-08

Abstract

The utility model discloses a gas detector, which comprises a power supply, a sensor, an audible and visual alarm, a display screen, a control output unit, an MCU (micro control Unit) singlechip and a communication unit, wherein the power supply is connected with the sensor; a power supply supplies power; the sensor is electrically connected with the input end of the MCU singlechip; the output end of the MCU singlechip is respectively electrically connected with the display screen, the audible and visual alarm and the control output unit; the communication unit and the MCU singlechip are in bidirectional transmission; the display screen is provided with an LED circuit, and the output end of the MCU singlechip is electrically connected with the LED circuit of the display screen. The catalytic gas-sensitive sensing element arranged in the utility model has high stability and small sensitivity drift, and can sensitively sense the content of propane in the air; the information such as the working state, the gas concentration condition, the alarm prompt and the like of the detector can be observed on site, and the information can be observed remotely; when alert, the gas detector can open the air discharge fan through the relay automatically, closes the pipeline valve through solenoid valve or manipulator, has reduced the potential safety hazard, has improved factor of safety.

Description

Gas detector

Technical Field

The utility model belongs to the technical field of Internet of things, and relates to a gas detector.

Background

Combustible gas applications are common in everyday life, business and production. The combustible gas is dangerous to leak, and when the concentration reaches the explosion limit and meets fire, explosion can occur. A gas sensor is a sensor for monitoring the concentration of a combustible gas that is responsive to a single or multiple combustible gas concentrations. For example, gas detectors may detect natural gas, liquefied gas, coal gas, hydrocarbons, and the like.

In order to prevent the gas from being damaged, a gas detector is necessary to be used for carrying out real-time on-line monitoring on the gas in some areas, and when the concentration of the combustible gas is detected to reach the explosion limit, the gas detector can send out an alarm signal so as to remind related personnel to take measures to ensure the safety.

Disclosure of Invention

In order to detect the concentration value of propane in air, the utility model provides a gas detector, which has the following technical scheme:

a gas detector comprises a power supply, a sensor, an audible and visual alarm, a display screen, a control output unit, an MCU singlechip and a communication unit; a power supply supplies power; the sensor is electrically connected with the input end of the MCU singlechip; the output end of the MCU singlechip is respectively electrically connected with the display screen, the audible and visual alarm and the control output unit; the communication unit and the MCU singlechip are in bidirectional transmission; the display screen is provided with an LED circuit, the output end of the MCU singlechip is electrically connected with the LED circuit of the display screen, and the model of the MCU singlechip is CX32L003-TSSOP202Y.

Preferably, the sensor comprises a catalytic gas-sensitive sensing element.

Preferably, the LED circuit in the display screen comprises a concentration process grid, an LED nixie tube and an indicator lamp;

the output end of the MCU singlechip is connected with a concentration process grid circuit;

the output of the MCU singlechip is connected with a nixie tube drive, and the MCU singlechip is connected with an LED nixie tube through the nixie tube drive; the indicator lamp comprises a power indicator lamp, a low-voltage indicator lamp, a high-voltage indicator lamp and a fault indicator lamp.

Preferably, the communication unit includes a wireless communication module and a wired communication module;

the wireless communication module comprises a receiver, the input end of the receiver is in wireless connection with the remote controller, and the output end of the receiver is in circuit connection with the input end of the MCU;

the wired communication module comprises a serial port, and the output end of the serial port is connected with the data reading interface.

Preferably, the control output unit includes a relay output, a solenoid valve control output, and a robot control output.

Preferably, the power indicator lamp is a green LED lamp, the low-newspaper indicator lamp and the high-newspaper indicator lamp are red LED lamps, and the fault indicator lamp is a yellow LED lamp.

Preferably, the audible and visual alarm comprises an LED lamp and a buzzer.

Preferably, the receiver is an infrared receiver, the input end of the infrared receiver is connected with infrared rays emitted by the remote controller, and the output end of the infrared receiver is connected with the input end of the MCU.

Preferably, the receiver is a radio frequency antenna, the radio frequency antenna receives radio waves emitted by the remote controller, and the radio frequency antenna is in circuit connection with the input end of the MCU singlechip.

Preferably, the wireless communication module further comprises an NB module and/or a 4G module.

The beneficial effects of the utility model are as follows: the sensor provided by the utility model comprises a catalytic gas-sensitive sensing element, has the characteristics of high stability, small sensitivity drift and the like, can sensitively sense the content of propane in air, and is particularly suitable for being used in the industrial and commercial fields; the information such as the working state, the gas concentration condition, the alarm prompt and the like of the detector can be observed on site, and the information can be observed remotely; when the alarm condition is reached, the gas detector can automatically open the exhaust fan through the relay, and the pipeline valve is closed through the electromagnetic valve or the manipulator, so that the potential safety hazard is reduced, and the safety factor is improved.

Drawings

FIG. 1 is a schematic view of the structural framework of the present utility model.

Fig. 2 is a schematic diagram of the principle of the MCU singlechip.

Fig. 3 is a schematic diagram of a sensor circuit.

Fig. 4 is a schematic diagram of the driving principle of the nixie tube.

Fig. 5 is a schematic diagram of the principle of the nixie tube.

Fig. 6 is a schematic diagram of an indicator light circuit.

Fig. 7 is a schematic circuit diagram of an audible and visual alarm.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Example 1

The embodiment provides a gas detector for detecting leakage of combustible gas and preventing harm caused by gas leakage, which can be applied to indoor places where the leakage of the combustible gas is likely to occur, and is particularly suitable for industrial and commercial places. The combustible gas will be hereinafter simply referred to as gas.

The gas detector of this embodiment includes power, sensor, audible and visual alarm, display screen, control output unit, MCU singlechip and communication unit etc.. The power supply is municipal 220V/50Hz, and supplies power for the whole machine.

The sensor is electrically connected with the input end of the MCU singlechip; the output end of the MCU singlechip is respectively electrically connected with the display screen, the audible and visual alarm and the control output unit; the communication unit and the MCU singlechip are in bidirectional transmission; the display screen is provided with an LED circuit, and the output end of the MCU singlechip is electrically connected with the LED circuit of the display screen.

The sensor comprises a high-stability catalytic gas-sensitive sensing element and has the characteristics of high stability, small sensitivity drift and the like. The sensor is connected with the MCU singlechip through analog signals, and the sensor inputs the acquired data into the MCU singlechip through analog signals.

The MCU singlechip is CX32L003-TSSOP202Y.

The MCU singlechip receives the data acquired by the sensor, analyzes and processes the data, transmits the concentration data after analysis and processing to the display screen, and displays a concentration result on the display screen; if the detected gas concentration exceeds the standard, the MCU singlechip sends an alarm instruction to the audible and visual alarm after analysis and processing, the audible and visual alarm sends a corresponding alarm prompt, and meanwhile, the MCU singlechip sends a control instruction to the control output unit, and the control output unit sends a corresponding control signal to take countermeasures to reduce risks. The MCU singlechip can also transmit the analyzed and processed data through the communication unit. The MCU singlechip also receives instruction information transmitted by the communication unit and gives corresponding feedback.

The gas detected by the embodiment is propane, and the catalytic gas-sensitive sensing element has good sensitivity to the propane and can detect the concentration of the propane. The housing of the embodiment is provided with an air inlet hole, and the air flows to the catalytic gas-sensitive sensing element through the air inlet hole, so that the embodiment can be used for detecting the air containing propane. Because the density of propane is higher than that of air, the embodiment is suitable for being arranged at a position which is 0.3-1.0 m higher than the ground and is 1.5 m away from the air source, and cannot be too close to a gas stove or arranged at a place with large oil smoke.

The present embodiment may set a low report value and a high report value. When the gas concentration detected by the sensor reaches a low report value or a high report value, the audible and visual alarm can give out audible and visual warning so that the personnel can be warned and take corresponding emergency measures.

The LED circuit in the display screen comprises a concentration process grid, an LED nixie tube and an indicator lamp.

The concentration process grid is arranged into a strip shape by a plurality of LED lamps, so that the process of the detected gas concentration change can be displayed more intuitively, the lighting length of the concentration process grid is long, and the gas leakage is much more; the lighting length of the concentration process grid lamp is short, which indicates that the gas leakage is less.

The output of the MCU singlechip is connected with a nixie tube drive, and the MCU singlechip is connected with an LED nixie tube through the nixie tube drive. The LED nixie tube can display data.

The indicator lamp comprises a power indicator lamp, a low-voltage indicator lamp, a high-voltage indicator lamp and a fault indicator lamp.

In this embodiment, the power indicator is a green LED lamp, the low-newspaper indicator and the high-newspaper indicator are red LED lamps, and the fault indicator is a yellow LED lamp.

When the power is turned on, the power indicator lights are on and emit green light; when the gas concentration reaches a low report value, the low report indicator lights are lightened and emit red light; when the gas concentration reaches or exceeds the high report value, the high report indicator lights are lightened and emit red light; when the sensor has faults, the fault indicator lamp in the display screen is long-lighted, namely the yellow LED lamp is long-lighted, and meanwhile the display screen displays 'E1'.

The audible and visual alarm comprises an LED lamp and a buzzer, and when the combustible gas in the air reaches or exceeds an alarm set value, the audible and visual alarm gives out audible and visual alarm, the LED lamp flashes, and the buzzer gives out alarm sound. The relevant personnel should take countermeasures at this time: (1) Immediately closing the pipeline valve or confirming that the pipeline valve is closed; (2) Immediately opening the window and the exhaust fan to circulate indoor air; (3) All fire sources are extinguished, and all objects capable of generating sparks are avoided; (4) avoiding switching on and off various electric appliances.

The communication unit of the present embodiment includes a wireless communication module and a wired communication module.

The wireless communication module comprises an infrared receiver which is matched with the remote controller. The input end of the infrared receiver is connected with the infrared rays emitted by the remote controller, and the output end of the infrared receiver is connected with the input end circuit of the MCU singlechip. The gas detector of the embodiment supports the control of a remote controller, the infrared receiver receives an infrared signal emitted by the remote controller and transmits the infrared signal to the MCU singlechip, and the MCU singlechip analyzes and processes the infrared signal and sends out a corresponding feedback instruction.

The wired communication module comprises a serial port, and the output end of the serial port is connected with the data reading interface. The data collected by the sensor and the data analyzed and processed by the MCU singlechip can be transmitted to the data reading interface through the serial port.

The control output unit comprises a relay output end, an electromagnetic valve control output end and a manipulator control output end, so as to output a switch instruction to control the exhaust fan and the gas pipeline. The output end of the relay is connected with the relay, and the output signal of the relay can control the switch state of the exhaust fan; the electromagnetic valve control output end outputs a signal for controlling the electromagnetic valve, the manipulator control output end outputs a signal for controlling the manipulator, and a user can select the electromagnetic valve or the manipulator to use according to actual conditions, so as to control the state of the gas pipeline valve.

In addition, the wireless communication module of the embodiment further comprises an NB module and/or a 4G module, which are used for realizing remote data transmission and facilitating remote monitoring of the on-site gas leakage condition.

The application steps of the embodiment are as follows:

1. the power supply is switched on, the green LED lamp of the power supply indicator lamp is on, the buzzer is in a beep state, the gas detector enters a preheating state, the display screen displays countdown for 180 seconds, and the preheating state is finished after 180 seconds.

2. After preheating is finished, the gas detector enters a normal working state, the gas leakage condition is monitored, the green LED of the power indicator is long-lighted, the display screen displays the concentration value, and meanwhile, the concentration process grid on the display screen also displays the concentration change condition.

3. When the gas leakage reaches a low report value or a high report value, a red LED lamp of the low report indicator lamp or a red LED lamp of the high report indicator lamp is lighted, a display screen displays the concentration value and the concentration change condition, meanwhile, an audible and visual alarm is started, and an LED lamp blinks and a buzzer sends out a beep-beep alarm sound. The control output unit outputs a signal to open the exhaust fan and close the gas pipeline valve.

4. When the sensor fails, the yellow LED lamp of the failure indicator lamp is long-lighted, the display screen displays E1, and the buzzer sends beep alarm sound. The personnel involved can disconnect the power supply and tie the maintenance process.

5. When detecting that the gas leakage exceeds the set value, the audible and visual alarm is started, the LED lamp flashes, the buzzer gives out alarm sound, and at the moment, the equipment can enter a silencing state by clicking a silencing button on the remote controller, and the state is automatically released after about 1 minute.

This embodiment avoids spraying air freshener, hair spray, paint or other aerosol in the vicinity of the detector during daily use.

Example two

On the basis of embodiment 1, the receiver of the wireless communication module is a radio frequency antenna, the radio frequency antenna receives radio waves emitted by the remote controller, and the radio frequency antenna is in circuit connection with the input end of the MCU singlechip. The embodiment supports remote controller control, the radio frequency antenna receives radio wave signals transmitted by the remote controller and transmits the radio wave signals to the MCU singlechip, and the MCU singlechip analyzes and processes the radio wave signals and transmits corresponding feedback instructions. The remote controller of this embodiment is the radio frequency remote controller, but all-round three-dimensional cover, in control range, need not to aim at gas detector and can carry out remote control operation, can pierce through barriers such as wall body, and the coverage is wider, and the remote control is convenient.

The remote controller can perform a plurality of item operations on the gas detector, such as setting the state of a relay, an electromagnetic valve or a manipulator, and also can perform manual alarm test, eliminate alarm sound and the like.

Claims

1. A gas detector comprises a power supply, a sensor, an audible and visual alarm, a display screen, a control output unit, an MCU singlechip and a communication unit, wherein the power supply is used for supplying power; the sensor is electrically connected with the input end of the MCU singlechip; the output end of the MCU singlechip is respectively electrically connected with the display screen, the audible and visual alarm and the control output unit; the communication unit and the MCU singlechip are in bidirectional transmission; the display screen is provided with an LED circuit, the output end of the MCU singlechip is electrically connected with the LED circuit of the display screen, and the model of the MCU singlechip is CX32L003-TSSOP202Y.

2. A gas sensor as claimed in claim 1, wherein the sensor comprises a catalytic gas sensor element.

3. The gas detector of claim 2, wherein the LED circuitry within the display screen comprises a concentration process grid, an LED nixie tube, and an indicator light;

4. A gas sensor according to claim 3, wherein the communication unit comprises a wireless communication module and a wired communication module;

5. The gas detector of claim 4, wherein the control output unit comprises a relay output, a solenoid control output, and a robot control output.

6. The gas detector of claim 5, wherein the power indicator is a green LED lamp, the low and high indicator is a red LED lamp, and the fault indicator is a yellow LED lamp.

7. A gas detector according to claim 6, wherein the audible and visual alarm comprises an LED lamp and a buzzer.

8. The gas detector of claim 7, wherein the receiver is an infrared receiver, an input end of the infrared receiver is connected with infrared rays emitted by the remote controller, and an output end of the infrared receiver is connected with an input end circuit of the MCU.

9. The gas detector of claim 6, wherein the receiver is a radio frequency antenna, the radio frequency antenna receives radio waves emitted by the remote controller, and the radio frequency antenna is in circuit connection with an input end of the MCU singlechip.

10. A gas sensor according to claim 8 or 9, wherein the wireless communication module further comprises NB and/or 4G modules.