CN217605788U - Poisonous and harmful gas detection device - Google Patents
Poisonous and harmful gas detection device Download PDFInfo
- Publication number
- CN217605788U CN217605788U CN202220047354.1U CN202220047354U CN217605788U CN 217605788 U CN217605788 U CN 217605788U CN 202220047354 U CN202220047354 U CN 202220047354U CN 217605788 U CN217605788 U CN 217605788U
- Authority
- CN
- China
- Prior art keywords
- harmful gas
- gas sensor
- toxic
- circuit board
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The utility model relates to a poisonous and harmful gas detection device, which comprises a poisonous and harmful gas sensor, a detection circuit board and an aluminum shell; the toxic and harmful gas sensor adopts a three-electrode electrochemical sensor, and three electrodes of the toxic and harmful gas sensor are in contact connection with the detection circuit board through copper columns; the toxic and harmful gas sensor and the detection circuit board are packaged by the aluminum shell; the detection circuit board outputs and inputs the signals to the outside through four copper contact pins, wherein two contact pins are used for connecting a power supply and the ground, and the other two contact pins are used for data communication. The utility model discloses a modular design based on small-size gas sensor passes through the encapsulation of aluminium system casing with three electrode electrochemical sensor and detection circuitry board, has characteristics small, that the response is fast, measurement accuracy is high, stability is better, long-life.
Description
Technical Field
The utility model belongs to the technical field of gaseous detection, especially, relate to a poisonous and harmful gas detection device.
Background
The gas detection instrument can effectively detect the concentration and the type of gas. The gas detecting instrument is an instrument and meter tool for detecting gas leakage concentration, and mainly refers to a portable and handheld gas detecting instrument. Gas sensors are used to detect the types of gases present in the environment, gas sensors are sensors used to detect the composition and content of gases. The gas detection instrument has wide application field, and covers various aspects of industry, agriculture, traffic, science and technology, environmental protection, national defense, aerospace, daily life and the like.
The gas sensor is a key part of a gas detector, and is a sensor capable of converting detected gas components and concentration into electric signals. The gas detecting device converts the gas type and the information related to the concentration into electric signals, and the information related to the existence condition of the gas to be detected in the environment can be obtained according to the strength of the electric signals, so that the detecting, monitoring and alarming can be performed, and an automatic detecting, controlling and alarming system can be formed by the interface circuit and a computer.
The gas detecting instrument converts physical or chemical non-electric signals collected by the gas sensor into electric signals, then the electric signals are rectified, filtered and the like through an external circuit, and the processed signals control corresponding modules to complete various detailed functions of gas exploration. The gas detector can detect various toxic and harmful gases such as hydrogen sulfide, carbon monoxide, oxygen, sulfur dioxide, ammonia gas, nitrogen dioxide, chlorine gas, ozone, combustible gas and the like.
The gas detectors are classified according to detection targets, and include combustible gas (including methane) detectors, toxic gas detectors, oxygen detectors, and the like. The combustible gas is classified according to the detection principle, and there are a catalytic incineration type, a semiconductor type, a thermal conductivity type, an infrared absorption type, and the like. The toxic gas detection is of electrochemical type, semiconductor type, etc.; the oxygen detection is of electrochemical type. Classified according to the mode of operation, portable and fixed, etc.
At present, gas detection instruments and meters using semiconductor and catalytic principles in the market are low in price, low in detection precision and short in service life, and electrochemical sensors and detection instruments have outstanding advantages in the field of monitoring low-concentration toxic gas and oxygen with high precision requirements.
A semiconductor gas sensor detects a gas by utilizing a change in physical properties such as electrical conductivity occurring when the gas to be detected comes into contact with the surface of a semiconductor (mainly, a metal oxide). When a semiconductor gas-sensitive device is heated to a stable state and gas is adsorbed by contacting the surface of the device, adsorbed molecules are first freely diffused at the surface (physical adsorption), lose their kinetic energy, and a part of the molecules in between are evaporated, and the remaining molecules are thermally decomposed and fixed at the adsorption site (chemical adsorption). The oxygen content in the air is substantially constant, so that the adsorption amount of oxygen is also constant, and the resistance value of the gas sensitive device is substantially constant. If the gas to be detected flows into the atmosphere, the surface of the device generates adsorption, the resistance value of the device changes along with the concentration of the gas, and the concentration of the gas can be known from the change relation between the concentration and the resistance value.
The electrochemical gas sensor utilizes a gas-sensitive electrode or a gas diffusion electrode and the like to form a series of batteries to measure the content of various gases. In which gas-sensitive electrodes measure the content of some gases dissolved in solution or are used for environmental monitoring, e.g. O 2 、CO 2 、SO 2 、NH 3 HCN, HF and the like, particularly the solid electrolyte gas sensor can adapt to severe environments such as high temperature, high pressure and the like and occasions with high concentration. The gas sensors have simple structure and good selectivity, can respond quickly and are convenient for automatic measurement and control.
As an instrument and meter tool for detecting gas leakage concentration, the composite detector can measure various gas types, the detection process is complex, and a common gas detector mainly refers to a single-measurement portable or handheld gas detector. The detection mode is diffusion type and pump suction type, and the pump suction type is relatively high in cost. The sensor is a semiconductor sensor with lower cost in the model selection, but the measurement accuracy, precision and stability are not high. Infrared sensors have good measurement performance, but there are some limitations on the type and range of gases measured.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a poisonous and harmful gas detection device adopts the modularized design based on small-size gas sensor, has miniaturized characteristics in structural design, and whole size accords with sensor self size, and the user of being convenient for installs, uses and maintains. The adopted sensor is compact and thin, has quick response time, can be directly and continuously detected on site, has the characteristics of strong stability and long service life, prolongs the service life of the sensor by five years, and obviously enlarges the working temperature and humidity range. The circuit design and the signal output are simple, the standard digital signals are adopted, all the measured values are obtained by direct measurement, calculation is not needed, and the subsequent development and use of a user are facilitated. In addition, the scheme can quickly and accurately detect the concentration of the specific gas, and the required maintenance cost is low.
The utility model provides a poisonous and harmful gas detection device, which comprises a poisonous and harmful gas sensor, a detection circuit board and an aluminum shell;
the toxic and harmful gas sensor adopts a three-electrode electrochemical sensor, and three electrodes of the toxic and harmful gas sensor are in contact connection with the detection circuit board through copper columns;
the toxic and harmful gas sensor and the detection circuit board are packaged by the aluminum shell;
the detection circuit board outputs and inputs the signals to the outside through four copper contact pins, wherein two contact pins are used for connecting a power supply and the ground, and the other two contact pins are used for data communication.
Furthermore, the detection circuit board comprises a signal detection module, a main controller, a power supply module and a communication interface module; the power supply module is connected with the toxic and harmful gas sensor, the signal detection module, the main controller and the communication interface module; the poisonous and harmful gas sensor is connected with the signal detection module, the signal detection module is connected with the main controller, and the main controller is connected with the communication interface module.
Further, the main controller adopts an STM32 chip.
Borrow by above-mentioned scheme, through poisonous and harmful gas detection device, adopt the modularized design based on small-size gas sensor, pass through aluminium system casing encapsulation with three electrode electrochemical sensor and detection circuitry board, have small, the response is fast, measurement accuracy is high, stability is better, long-life characteristics.
The above description is only an outline of the technical solution of the present invention, and in order to make the technical means of the present invention more clear and to implement the technical means according to the content of the description, the preferred embodiments of the present invention will be described in detail below.
Drawings
FIG. 1 is a perspective view of the toxic and harmful gas detecting device of the present invention;
FIG. 2 is a side view (dimension unit in mm) of the toxic and harmful gas detecting device of the present invention;
FIG. 3 is a block diagram of the toxic and harmful gas detecting device of the present invention;
FIG. 4 is a circuit diagram of a toxic and harmful gas sensor according to the present invention;
fig. 5 is a circuit diagram of the signal detection module of the present invention;
fig. 6 is a circuit diagram of the main controller of the present invention;
fig. 7 is a circuit diagram of the communication interface module of the present invention;
fig. 8 is a circuit diagram of the power module of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1 to 8, the present embodiment provides a toxic and harmful gas detection device, including a toxic and harmful gas sensor 1, a detection circuit board 2, and an aluminum housing 3;
the toxic and harmful gas sensor 1 adopts a three-electrode electrochemical sensor, and three electrodes of the toxic and harmful gas sensor are connected and fully contacted with the detection circuit board 2 through copper columns;
the toxic and harmful gas sensor 1 and the detection circuit board 2 are packaged by an aluminum shell 3;
the detection circuit board 2 outputs and inputs to the outside through four copper pins 4, wherein two pins are used for connecting a power supply and the ground, and the other two pins are used for data communication.
Specifically, the detection circuit board 2 includes a signal detection module 21, a main controller 22, a power supply module 24 and a communication interface module 23; the power module 24 is connected with the toxic and harmful gas sensor 1, the signal detection module 21, the main controller 22 and the communication interface module 23; the toxic and harmful gas sensor 1 is connected with the signal detection module 21, the signal detection module 21 is connected with the main controller 22, and the main controller 22 is connected with the communication interface module 23.
The toxic and harmful gas sensor in the embodiment adopts a HONEYWELL 1 series three-electrode electrochemical sensor. This poisonous and harmful gas detection device adopts the modularized design based on small-size gas sensor, passes through aluminium system casing encapsulation with three electrode electrochemical sensor and detection circuitry board, has characteristics small, that the response is fast, measurement accuracy is high, stability is better, long-life.
The gas sensor comprises a CO sensor (measuring range of 0-1000ppm, maximum supportable 2000 ppm), O 2 Sensor (measurement range 0-25% VOL), H 2 S sensor (measurement range of 0-200 ppm) and combustible gas sensor (measurement range of 0-100% LEL).
The detection circuit board 2 adopts the L0 series of STM32 as a main controller, and the running speed is high. The detection circuit board 2 amplifies the weak signal of the gas sensor through the operational amplifier and then enters an STM32 chip for concentration calculation and processing. The device adopts a 5V power supply to supply power, the output can support 3.3V TTL level output or RS3485 output, and the output mode can carry out digital output according to the requirement.
The electrolyte in the toxic and harmful gas sensor 1 generates weak electric signals through oxidation or reduction reaction with toxic gas in the environment, the electric signals are stabilized and amplified through detection circuits such as pressure-current conversion and an operational amplifier for signal conditioning, and then the electric signals enter a minimum CPU system based on STM32 for operation processing. The communication interface module 23 can communicate with the outside. The power module 24 provides stable current and voltage signals for the above parts, and ensures the stable operation of the circuit parts.
The toxic and harmful gas detection device is based on a gas sensor designed by a 1-series three-electrode electrochemical sensor of honeywell, the gas sensor is communicated with calibration software in a UART (universal asynchronous receiver/transmitter) mode in calibration, and a gas sensor detection module directly outputs gas concentration data after calibration, so that great convenience is brought to debugging, use and maintenance of a user, and the design and development period of the user is greatly shortened.
The gas sensor has good consistency and stability after aging, debugging and calibration. Through detecting circuit board, can convenience of customers tests, can detect and output data specific gas fast.
The 32-bit CPU system of STM32 is adopted to the main control unit, and the functioning speed is very fast, and the sensor signal gets into the system and carries out the rapid operation after pressure flow converting circuit and operational amplification and reference voltage mediate, and CPU's TSSOP14 encapsulation more is fit for miniaturized circuit design in addition, is favorable to saving the module space, but can ensure the normal steady operation of whole device.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A poisonous and harmful gas detection device is characterized by comprising a poisonous and harmful gas sensor, a detection circuit board and an aluminum shell;
the toxic and harmful gas sensor adopts a three-electrode electrochemical sensor, and three electrodes of the toxic and harmful gas sensor are in contact connection with the detection circuit board through copper columns;
the toxic and harmful gas sensor and the detection circuit board are packaged by the aluminum shell;
the detection circuit board outputs and inputs the signals to the outside through four copper contact pins, wherein two contact pins are used for connecting a power supply and the ground, and the other two contact pins are used for data communication.
2. The toxic and harmful gas detection device according to claim 1, wherein the detection circuit board comprises a signal detection module, a main controller, a power module and a communication interface module; the power supply module is connected with the toxic and harmful gas sensor, the signal detection module, the main controller and the communication interface module; the poisonous and harmful gas sensor is connected with the signal detection module, the signal detection module is connected with the main controller, and the main controller is connected with the communication interface module.
3. The poisonous and harmful gas detection device of claim 2, wherein the main controller employs an STM32 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220047354.1U CN217605788U (en) | 2022-01-10 | 2022-01-10 | Poisonous and harmful gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220047354.1U CN217605788U (en) | 2022-01-10 | 2022-01-10 | Poisonous and harmful gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605788U true CN217605788U (en) | 2022-10-18 |
Family
ID=83561892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220047354.1U Active CN217605788U (en) | 2022-01-10 | 2022-01-10 | Poisonous and harmful gas detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605788U (en) |
-
2022
- 2022-01-10 CN CN202220047354.1U patent/CN217605788U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Low power multimode electrochemical gas sensor array system for wearable health and safety monitoring | |
| CN201402268Y (en) | Intelligent environmental air quality monitor | |
| CN111579619B (en) | Oxygen detector, detection method and application | |
| CN206362601U (en) | A kind of gas-detecting device | |
| CN202256247U (en) | Multifunction handheld harmful gas detector | |
| CN217605788U (en) | Poisonous and harmful gas detection device | |
| Li et al. | Wearable autonomous microsystem with electrochemical gas sensor array for real-time health and safety monitoring | |
| CN105424904A (en) | Gunpowder gas ingredient testing system | |
| CN202049108U (en) | Gas detecting device for mine shaft based on wireless emission device | |
| CN108802150A (en) | A kind of novel gaseous state pollutant concentration sensor based on four electrode systems | |
| KR102169914B1 (en) | Electrochemical nitrogen oxides gas sensor | |
| CN205785306U (en) | A kind of hydrogen detection system based on metal-oxide gas sensor | |
| CN213689458U (en) | Atmosphere NO based on DSP2Electrochemical monitoring device | |
| CN202599822U (en) | Gas detector | |
| CN213689455U (en) | Portable atmosphere O3 electrochemistry monitoring devices | |
| CN215493496U (en) | Diffusion type multi-gas concentration detection device | |
| CN211263273U (en) | Semiconductor gas sensor capable of controlling temperature | |
| CN208140628U (en) | A kind of novel gaseous state pollutant concentration electrochemical sensor | |
| CN211825813U (en) | Multifunctional air quality detector | |
| CN100465637C (en) | Wireless monitoring device for oxygen content in essential safety energy-saving type coke-oven gas | |
| CN103837573A (en) | Cotton moisture tester | |
| CN207675722U (en) | One kind being used for bushing oil and gas composite on-Line Monitor Device | |
| CN220231638U (en) | Portable multi-gas detector | |
| CN201788144U (en) | Ammonia gas sensor based on nano porous reflecting and sensing materials | |
| CN110108844A (en) | A kind of Multifunctional environment air quality detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |