CN112763667A - Realize gaseous modular circuit and gaseous detector that detects of multiple gas - Google Patents
Realize gaseous modular circuit and gaseous detector that detects of multiple gas Download PDFInfo
- Publication number
- CN112763667A CN112763667A CN202110108237.1A CN202110108237A CN112763667A CN 112763667 A CN112763667 A CN 112763667A CN 202110108237 A CN202110108237 A CN 202110108237A CN 112763667 A CN112763667 A CN 112763667A
- Authority
- CN
- China
- Prior art keywords
- circuit
- pin
- module
- digital
- analog conversion
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- 239000007789 gas Substances 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000001914 filtration Methods 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 14
- 238000012356 Product development Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention is applicable to the field of circuits, and provides a modular circuit for realizing detection of multiple gases, which comprises a first module circuit and a second module circuit, wherein the second module circuit can be embedded into the first module circuit and is electrically connected through a corresponding stamp hole, the first module circuit comprises a digital-to-analog conversion circuit, a power supply circuit, a plurality of standard interface circuits and a filter circuit, and the first module circuit and the second module circuit are electrically connected through the standard interface circuits. The invention also provides a gas detector, and by adopting the technical scheme of the invention, the complex circuit is decomposed into the reusable module, so that the design efficiency is obviously improved, and the product development cycle is greatly shortened.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, and particularly relates to a modular circuit for detecting various gases.
Background
The gas detector is an instrument and meter tool for detecting gas leakage concentration, mainly utilizes a gas sensor to detect gas components and content in the environment, and is an important instrument for guarding the life health, environmental safety and property safety of people. The existing gas detector can detect a variety of gases, and according to the detection method of each gas, various sensors with different technical and precision requirements are realized.
Gas detectors are classified into semiconductor gas sensors, catalytic combustion gas sensors, electrochemical gas sensors, PID photoionization gas sensors, infrared gas sensors, and the like according to the operating principle of the gas sensors. No matter which kind of gas sensor, its theory of operation please refer to fig. 1, after adaptation gas got into the sensor, the gas sensor can produce a weak analog electric signal, through signal conditioning, enlargies, after the filtering process, changed analog signal into digital signal through AD analog-to-digital conversion circuit, supplied the singlechip, by singlechip demonstration or warning. The gas detector circuit shown in fig. 1 has various sensors according to the detection method of each gas, and the implementation technology and precision requirements, and each sensor is designed with a corresponding signal conditioning, amplifying, filtering, AD conversion circuit, power supply circuit and interface circuit. The design efficiency is low, the repeated utilization rate is low, the replacement is not easy, the design and production cost is high, the period is long, the product quality is uneven, and the maintenance and after-sale are poor.
Disclosure of Invention
The invention aims to provide a modular circuit for realizing detection of various gases, and aims to solve the problems that an existing gas detection circuit is low in repeated utilization rate and not easy to replace.
The invention is realized in such a way that the circuit comprises a first module circuit and a second module circuit, the second module circuit can be embedded into the first module circuit and is electrically connected through a corresponding stamp hole, the first module circuit comprises a digital-to-analog conversion circuit, a power supply circuit, a plurality of standard interface circuits and a filter circuit, and the first module circuit and the second module circuit are electrically connected through the standard interface circuits.
1, the digital-to-analog conversion circuit in the first module circuit includes a first digital-to-analog conversion circuit and a second digital-to-analog conversion circuit, the first digital-to-analog conversion circuit includes a digital-to-analog conversion chip U26, one end of an 8 th pin of the digital-to-analog conversion chip U26 is grounded through three capacitors C157, C158 and C159 which are connected in parallel, the other end of the 8 th pin is connected with a 3.3-a power supply signal, a 1 st pin of the digital-to-analog conversion chip U26 is grounded, and an IIC bus address is 100100; the second digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U27, three capacitors C154, C155 and C156 which are connected in parallel, one ends of the capacitors C154, C155 and C156 which are connected in parallel are grounded, the other ends of the capacitors C154, C155 and C156 which are connected in parallel are respectively connected with a No. 2 pin and a No. 8 pin of the digital-to-analog conversion chip U27, the second digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U27, one ends of the capacitors C154, C155 and C156 which are connected in parallel are grounded, the other end is connected with a 3.3-A power supply signal to filter power supply noise and prevent signal interference, a No. 1 pin of the digital-to-analog conversion chip U27.
Preferably, the power supply circuit in the first module circuit is composed of an LDO power chip U23, and provides voltage references for the operational amplifier chip U8 of the second module circuit and the digital-to-analog conversion chips U26 and U27 of the first circuit module; a1 st pin of the power chip U23 is connected with capacitors C135, C136 and C137 in parallel and is connected with a 3.3A voltage signal to filter out input power noise, and a 2 nd pin is connected with bypass capacitors C138, C140 and C141 in parallel and is used for filtering out power noise of an output power REF.
Preferably, the standard interface circuit comprises a J5 interface circuit, a J6 interface circuit, a J7 interface circuit, a J8 interface circuit and a P4 interface circuit, and the J5, the J6, the J7, the J8 and the P4 interface circuits are all Header pin connectors; the standard interface circuit in the first module circuit comprises a P4 interface circuit and J5, J6, J7 and J8 interface circuits, wherein the P4 interface circuit is connected with a mainboard by adopting a Header pin connector, a first pin and a fourth pin of P4 are reserved pins and are temporarily not used, a second pin and a third pin are IIC signals of the first module circuit, the signals are sensor signals obtained after digital-to-analog conversion of U26 and U27 chips and are transmitted to the mainboard through an IIC bus, a mainboard MCU acquires the signals of the sensors through the IIC bus, and a fifth pin, a sixth pin and a seventh pin are used for supplying power to the first module through the mainboard and respectively supplying a V _ CC power supply and a 3.3-A power supply to the first module; the J5, J6, J7 and J8 interface circuits are connected with the second module circuit by stamp hole interfaces, wherein the first pin, the second pin, the third pin and the fourth pin supply power to the second module circuit and respectively supply a V _ CC power supply, a 3.3-A power supply and a REF power supply to the second module circuit, and the fifth pin of the J5, J6, J7 and J8 interface circuits provides the sensor signals amplified by the second module circuit to the first module circuit.
Preferably, the second module circuit comprises a sensor secondary amplifying circuit, a filtering conditioning circuit and a standard interface circuit, wherein the operational amplifier chip U8, the resistors R27, R29, R35, R40 and the capacitor C30 form a primary I-V conversion circuit, the small signal current of the sensor S3 is amplified into a voltage signal in a range of 1.25V-2.5V, and then the voltage signal is filtered through the R34 and the C34; the operational amplifier chip U10, the capacitor C36 and the resistor R41 form a voltage follower as a second-stage amplifying circuit; and the standard interface circuit J3 is connected with the first module circuit through a stamp hole interface, the first module circuit supplies power to the second module circuit through a first pin, a second pin, a third pin and a fourth pin of the J3 standard interface circuit, the first pin, the second pin, the third pin and the fourth pin respectively supply a V _ CC power supply signal, a 3.3-A power supply signal and a REF power supply signal, and the fifth pin of the J3 interface supplies an amplified sensor signal to the first module circuit.
The invention also provides a gas detector which can be used for detecting various gases and comprises the modular circuit capable of realizing the detection of various gases.
The invention provides the method. Compared with the prior art, the technical scheme disclosed by the invention has the advantages that the complex circuit is decomposed into the reusable module, the design efficiency is obviously improved, and the product development period is greatly shortened.
Drawings
Fig. 1 is a block diagram showing a conventional gas detection circuit;
FIG. 2 is a schematic diagram of a first circuit module of the gas detection circuit according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a second circuit module of the gas detection circuit according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a standard interface structure of the second circuit module in fig. 3.
Detailed Description
5 in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2 and 3, a circuit for detecting multiple gases according to an embodiment of the present invention includes a first module circuit and a second module circuit, where the first module circuit may be embedded in the second module circuit and electrically connected to the second module circuit through a corresponding stamp hole.
Referring to fig. 2, the first module circuit includes a digital-to-analog conversion circuit, a power supply circuit, a plurality of standard interface circuits, and a filtering and bypass circuit. The digital-to-analog conversion circuit comprises a first digital-to-analog conversion circuit and a second digital-to-analog conversion circuit, the first digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U26, one end of an 8 th pin (VDD pin) of the digital-to-analog conversion chip U26 is grounded through three capacitors C157, C158 and C159 which are connected in parallel, and the other end of the 8 th pin is connected with a 3.3-A power supply signal to filter power noise waves so as to prevent signal interference; pin 1 (ADDR pin) of U26 is connected to ground and the IIC bus address is 1001000. The second digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U27, one end of each of three capacitors C154, C155 and C156 connected in parallel is grounded, the other end of each capacitor is connected with a 3.3-A power supply signal to filter power supply noise and prevent signal interference, the 1 st pin (ADDR pin) of U27 is connected with the 3.3-A power supply, and the address of an IIC bus is 1001001.
8 the power supply circuit in the first module circuit is composed of an LDO power chip U23, and provides voltage reference for the operational amplifier chip U8 of the second module circuit and the digital-to-analog conversion chips U26 and U27 of the first circuit module. A1 st pin of the power chip U23 is connected with capacitors C135, C136 and C137 in parallel to be connected with a 3.3A voltage signal to filter out input power noise, and a 2 nd pin is connected with bypass capacitors C138, C140 and C141 in parallel to filter out power noise of an output power REF.
9 standard interface circuit in the first module circuit includes P4 interface circuit and J5, J6, J7, J8 interface circuit, wherein, P4 interface circuit adopts the Header pin connector to link to the mainboard, the first and fourth pins of P4 are reserved pins, temporarily do not use, the second pin and the third pin are IIC signal of the first module, this signal is the sensor signal after the digital-to-analog conversion of U26 and U27 chip, transmit to the mainboard through IIC bus, the mainboard MCU collects the sensor signal through IIC bus form. And the fifth pin, the sixth pin and the seventh pin are used for supplying power to the first module by the mainboard and respectively supplying a V _ CC power supply and a 3.3-A power supply to the first module. In addition, the J5, J6, J7 and J8 interface circuits are connected with the second module circuit by a stamp hole interface, wherein the first pin, the second pin, the third pin and the fourth pin supply power to the second module circuit and respectively supply a V _ CC power supply, a 3.3-A power supply and a REF power supply to the second module circuit, and the fifth pin of the J5, J6, J7 and J8 interfaces provides the sensor signal amplified by the second module circuit to the first module circuit.
Referring to fig. 3 and 4, the second module circuit is composed of a sensor secondary amplification circuit, a filter conditioning circuit and a standard interface circuit. An operational amplifier chip U8, resistors R27, R29, R35, R40 and a capacitor C30 form a primary I-V conversion circuit, the small signal current of a sensor S3 is amplified into a voltage signal in a range of 1.25V-2.5V, and then the voltage signal is filtered through R34 and C34. A voltage follower consisting of U10, C36 and R41 is used for the second stage of amplification. And the standard interface circuit J3 is connected with the first module through a stamp hole interface, wherein the first pin, the second pin, the third pin and the fourth pin of the J3 are used for supplying power to the second module by the first module and respectively supplying a V _ CC power supply, a 3.3-A power supply and a REF power supply, and a sensor signal amplified by the second module circuit is provided to the first module circuit by the fifth pin of the J3 interface.
The invention also provides a gas detector which comprises the circuit structure for realizing the detection of various gases.
12 in the embodiment of the present invention, a digital-to-analog conversion circuit, a power supply circuit, various interface circuits, etc. are defined as a first module circuit, a sensor output signal is conditioned, amplified, and filtered to be defined as a second module circuit, and the first module circuit and the second module circuit are connected by a standard pin connector. When the module II is installed, the module II is nested in the module I and is electrically connected through the corresponding stamp hole.
13 the solution provided by the embodiment of the present invention is directed to a gas detector which can detect a large amount of gas, various sensors used for detection, and a circuit matched with the sensors having a large number of tasks. The design process is simplified, the complex circuit is decomposed into the reusable modular circuit, the designs of the first module circuit and the second module circuit are not influenced with each other, the design change of the first module circuit does not influence the second module circuit, and the design change of the second module circuit does not influence the second module circuit, so that the design efficiency is obviously improved, and the product development period is greatly shortened. The circuit designer can apply more time and energy to other aspects of the gas detector, such as product precision and product stability, and product design quality is improved. Meanwhile, the module design of the standard interface can provide a basis for the team to cooperate together, a large circuit is divided into smaller modules, designers of all parts can design a schematic diagram and layout and wiring of a PCB according to plans, and finally the design is integrated on the PCB, so that the design period of a single board is shortened. After the modular design is adopted, the number of circuit boards in product production is remarkably reduced, the production management is easy, the production cost is greatly reduced, and the product quality is improved. In addition, due to the introduction of the standard interface, all modules are easy to replace and maintain, and products are easier to repair.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The circuit comprises a first module circuit and a second module circuit, wherein the second module circuit can be embedded into the first module circuit and is electrically connected with the first module circuit through a corresponding stamp hole, the first module circuit comprises a digital-to-analog conversion circuit, a power supply circuit, a plurality of standard interface circuits and a filter circuit, and the first module circuit and the second module circuit are electrically connected through the standard interface circuits.
2. The modular circuit as claimed in claim 1, wherein the digital-to-analog conversion circuit in the first module circuit comprises a first digital-to-analog conversion circuit and a second digital-to-analog conversion circuit, the first digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U26, one end of the 8 th pin of the digital-to-analog conversion chip U26 is grounded through three capacitors C157, C158 and C159 which are connected in parallel, the other end is connected with a 3.3-a power supply signal, the 1 st pin of the digital-to-analog conversion chip U26 is grounded, and the IIC bus address is 100100; the second digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U27, three capacitors C154, C155 and C156 which are connected in parallel, one ends of the capacitors C154, C155 and C156 which are connected in parallel are grounded, the other ends of the capacitors C154, C155 and C156 which are connected in parallel are respectively connected with a No. 2 pin and a No. 8 pin of the digital-to-analog conversion chip U27, the second digital-to-analog conversion circuit comprises a digital-to-analog conversion chip U27, one ends of the capacitors C154, C155 and C156 which are connected in parallel are grounded, the other end is connected with a 3.3-A power supply signal to filter power supply noise and prevent signal interference, a No. 1 pin of the digital-to-analog conversion chip U27.
3. The modular circuit of claim 1, wherein the power supply circuit of the first module circuit is composed of an LDO power chip U23, and provides a voltage reference for the operational amplifier chip U8 of the second module circuit and the digital-to-analog conversion chips U26 and U27 of the first circuit module; a1 st pin of the power chip U23 is connected with capacitors C135, C136 and C137 in parallel and is connected with a 3.3A voltage signal to filter out input power noise, and a 2 nd pin is connected with bypass capacitors C138, C140 and C141 in parallel and is used for filtering out power noise of an output power REF.
4. The modular circuit of claim 1, wherein the standard interface circuits include a J5 interface circuit, a J6 interface circuit, a J7 interface circuit, a J8 interface circuit, and a P4 interface circuit, the J5, J6, J7, J8, and P4 interface circuits being Header pin connectors; the standard interface circuit in the first module circuit comprises a P4 interface circuit and J5, J6, J7 and J8 interface circuits, wherein the P4 interface circuit is connected with a mainboard by adopting a Header pin connector, a first pin and a fourth pin of P4 are reserved pins and are temporarily not used, a second pin and a third pin are IIC signals of the first module circuit, the signals are sensor signals obtained after digital-to-analog conversion of U26 and U27 chips and are transmitted to the mainboard through an IIC bus, a mainboard MCU acquires the signals of the sensors through the IIC bus, and a fifth pin, a sixth pin and a seventh pin are used for supplying power to the first module through the mainboard and respectively supplying a V _ CC power supply and a 3.3-A power supply to the first module; the J5, J6, J7 and J8 interface circuits are connected with the second module circuit by stamp hole interfaces, wherein the first pin, the second pin, the third pin and the fourth pin supply power to the second module circuit and respectively supply a V _ CC power supply, a 3.3-A power supply and a REF power supply to the second module circuit, and the fifth pin of the J5, J6, J7 and J8 interface circuits provides the sensor signals amplified by the second module circuit to the first module circuit.
5. The modular circuit of claim 1, wherein the second module circuit comprises a sensor secondary amplifying circuit, a filtering conditioning circuit and a standard interface circuit, wherein the operational amplifier chip U8, the resistors R27, R29, R35, R40 and the capacitor C30 form a primary I-V conversion circuit, amplify the small signal current of the sensor S3 into a voltage signal in the interval of 1.25V-2.5V, and filter the voltage signal through the R34 and the C34; the operational amplifier chip U10, the capacitor C36 and the resistor R41 form a voltage follower as a second-stage amplifying circuit; and the standard interface circuit J3 is connected with the first module circuit through a stamp hole interface, the first module circuit supplies power to the second module circuit through a first pin, a second pin, a third pin and a fourth pin of the J3 standard interface circuit, the first pin, the second pin, the third pin and the fourth pin respectively supply a V _ CC power supply signal, a 3.3-A power supply signal and a REF power supply signal, and the fifth pin of the J3 interface supplies an amplified sensor signal to the first module circuit.
6. A gas detector, which can be used for detecting multiple gases, is characterized in that the gas detector comprises the modular circuit capable of realizing multiple gas detection as claimed in any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110108237.1A CN112763667A (en) | 2021-01-27 | 2021-01-27 | Realize gaseous modular circuit and gaseous detector that detects of multiple gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110108237.1A CN112763667A (en) | 2021-01-27 | 2021-01-27 | Realize gaseous modular circuit and gaseous detector that detects of multiple gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112763667A true CN112763667A (en) | 2021-05-07 |
Family
ID=75706029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110108237.1A Pending CN112763667A (en) | 2021-01-27 | 2021-01-27 | Realize gaseous modular circuit and gaseous detector that detects of multiple gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112763667A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230716A1 (en) * | 2002-04-12 | 2003-12-18 | Infrared Industries, Inc. | Multi-gas analyzer |
| US20050154494A1 (en) * | 2003-09-26 | 2005-07-14 | Osman Ahmed | Integrated building environment data system |
| CN201355359Y (en) * | 2008-12-31 | 2009-12-02 | 王宽喜 | Multi-functional Modularized gas detector |
| CN101915737A (en) * | 2010-08-03 | 2010-12-15 | 武汉科技大学 | Detection instrument for detecting concentration of CO gas |
| CN203148960U (en) * | 2013-04-13 | 2013-08-21 | 西安科技大学 | Coal mine underground air monitoring device based on microfluidic technology |
| CN205135709U (en) * | 2015-10-31 | 2016-04-06 | 西安科技大学 | Gaseous wireless sensor network monitoring system of coal spontaneous combustion index |
| CN208239406U (en) * | 2018-06-19 | 2018-12-14 | 扬州大学 | Gas-detecting device based on GPRS |
| CN109187667A (en) * | 2018-10-17 | 2019-01-11 | 哈尔滨工业大学 | Environmental gas apparatus for measuring concentration and its application method |
| CN208999039U (en) * | 2018-11-16 | 2019-06-18 | 长庆石油勘探局有限公司技术监测中心 | A kind of multistation gas detecting instrument verification system |
| BR112019016704A2 (en) * | 2017-02-22 | 2020-04-07 | Mario Bardoni Giovanni | multiple gas measurement module and measurement process |
| KR20200044174A (en) * | 2018-10-05 | 2020-04-29 | 재단법인 포항산업과학연구원 | Gas detection apparatus |
| CN113156054A (en) * | 2020-12-28 | 2021-07-23 | 深圳市安帕尔科技有限公司 | Gas detection circuit and gas detector |
-
2021
- 2021-01-27 CN CN202110108237.1A patent/CN112763667A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030230716A1 (en) * | 2002-04-12 | 2003-12-18 | Infrared Industries, Inc. | Multi-gas analyzer |
| US20050154494A1 (en) * | 2003-09-26 | 2005-07-14 | Osman Ahmed | Integrated building environment data system |
| CN201355359Y (en) * | 2008-12-31 | 2009-12-02 | 王宽喜 | Multi-functional Modularized gas detector |
| CN101915737A (en) * | 2010-08-03 | 2010-12-15 | 武汉科技大学 | Detection instrument for detecting concentration of CO gas |
| CN203148960U (en) * | 2013-04-13 | 2013-08-21 | 西安科技大学 | Coal mine underground air monitoring device based on microfluidic technology |
| CN205135709U (en) * | 2015-10-31 | 2016-04-06 | 西安科技大学 | Gaseous wireless sensor network monitoring system of coal spontaneous combustion index |
| BR112019016704A2 (en) * | 2017-02-22 | 2020-04-07 | Mario Bardoni Giovanni | multiple gas measurement module and measurement process |
| CN208239406U (en) * | 2018-06-19 | 2018-12-14 | 扬州大学 | Gas-detecting device based on GPRS |
| KR20200044174A (en) * | 2018-10-05 | 2020-04-29 | 재단법인 포항산업과학연구원 | Gas detection apparatus |
| CN109187667A (en) * | 2018-10-17 | 2019-01-11 | 哈尔滨工业大学 | Environmental gas apparatus for measuring concentration and its application method |
| CN208999039U (en) * | 2018-11-16 | 2019-06-18 | 长庆石油勘探局有限公司技术监测中心 | A kind of multistation gas detecting instrument verification system |
| CN113156054A (en) * | 2020-12-28 | 2021-07-23 | 深圳市安帕尔科技有限公司 | Gas detection circuit and gas detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108663088A (en) | Intelligent photovoltaic power station distribution cloud monitors system | |
| CN108760989A (en) | A kind of air-quality monitoring system and its monitoring method | |
| CN112763667A (en) | Realize gaseous modular circuit and gaseous detector that detects of multiple gas | |
| CN111721995A (en) | Isolation sampling circuit of direct current voltage signal | |
| CN201885963U (en) | Miniature gas detector | |
| CN106370569A (en) | Particulate matter online monitor signal pre-processing circuit based on Mie scattering | |
| CN209327259U (en) | Hydrogen gas detector | |
| CN217442594U (en) | Detection device and system of nitrogen oxygen sensor | |
| CN205483304U (en) | Automatic data logger of digital exhaust temperature | |
| CN113281052B (en) | Wireless temperature measurement emission controller for low-frequency acquisition of surface temperature of piston of internal combustion engine | |
| CN107238685A (en) | A kind of gas collecting device for gas monitor | |
| CN110927464B (en) | Online detection system for isolated power supply | |
| CN115436312A (en) | Gas content analysis device based on differential infrared signal detection | |
| CN203595707U (en) | Point-type combustible gas detector | |
| CN211293690U (en) | Data acquisition system based on differential bridge circuit | |
| CN204964435U (en) | Gaseous sensing monitoring devices of multilayer formula electrochemistry | |
| CN203858471U (en) | Micro-power-consumption power supply management system based on PIC18F series single-chip microcomputer | |
| CN209215973U (en) | A kind of High Precision Low Temperature drift bipolarity Multichannel constant-current source circuit | |
| CN217643300U (en) | Combustible gas signal amplification circuit and detector | |
| CN106442869A (en) | Low-power-consumption intelligent SO2 sensor module | |
| CN205228378U (en) | Non -contact angle sensor for EPS | |
| CN208091399U (en) | A kind of novel detection circuit of the high precision high stability based on pneumoelectric electron beam | |
| CN219143556U (en) | Multi-frequency gas alarm | |
| CN2403085Y (en) | Linear infrared beam smoke sensing detector | |
| CN219978417U (en) | Virtual soldering detection circuit of chip IO point |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |