CN112179575A - Soaking detection circuit suitable for gas detection equipment - Google Patents
Soaking detection circuit suitable for gas detection equipment Download PDFInfo
- Publication number
- CN112179575A CN112179575A CN202011008163.6A CN202011008163A CN112179575A CN 112179575 A CN112179575 A CN 112179575A CN 202011008163 A CN202011008163 A CN 202011008163A CN 112179575 A CN112179575 A CN 112179575A
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- China
- Prior art keywords
- pin
- voltage comparator
- control unit
- main control
- detection
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Links
- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 238000002791 soaking Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000007654 immersion Methods 0.000 claims abstract description 13
- 239000003245 coal Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/20—Status alarms responsive to moisture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to a water immersion detection circuit suitable for gas detection equipment, which is technically characterized in that: the intelligent control device comprises a main control unit, a water immersion detection interface, a voltage comparator and a voltage dividing circuit, wherein the main control unit is connected with the water immersion detection interface through a GPIO pin and a ground wire pin, the GPIO pin is connected with a VIN + pin of the voltage comparator, a VIN-pin of the voltage comparator is connected with the voltage dividing circuit, and a VOUT pin of the voltage comparator is connected with another GPIO pin of the main control unit. The invention has reasonable design, the main control unit is provided with the immersion detection interface with the GOPO PIN structure and is connected with the voltage comparator, whether the equipment is immersed is judged according to the output voltage of the voltage comparator, the functions of early warning and protecting the equipment can be achieved, and the safe and reliable operation of the underground gas detection equipment of the coal mine is ensured.
Description
Technical Field
The invention belongs to the technical field of immersion detection, relates to an immersion detection technology, and particularly relates to an immersion detection circuit suitable for gas detection equipment.
Background
In order to ensure the safety of underground construction of a coal mine, gas detection equipment is usually installed in the coal mine for detecting the concentration of gases such as carbon monoxide, oxygen, hydrogen sulfide, methane and the like. When carrying out the gaseous detection in pit, the condition such as humidity and water level rising can often appear in the pit, at this moment, install the gaseous check out test set in the pit in the colliery, especially detect gaseous NB equipment, often lead to equipment can not normally detect gas because of the condition of soaking, even equipment damages.
The underground gas detection equipment of the coal mine is not found to have the soaking detection function through retrieval, so that a technology capable of effectively detecting whether the underground gas detection equipment is soaked is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the water immersion detection circuit which is reasonable in design, accurate, reliable and strong in real-time performance and is suitable for gas detection equipment.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a detection circuitry soaks suitable for gas detection equipment, includes main control unit, soaks and detects interface, voltage comparator and bleeder circuit, the main control unit is connected with the detection interface that soaks through a GPIO pin and ground wire pin, and this GPIO pin is connected with voltage comparator's VIN + pin, voltage comparator's VIN-pin is connected with bleeder circuit, voltage comparator's VOUT pin is connected with another GPIO pin of main control unit.
And, the detection interface that soaks is POGO PIN structure's detection interface.
And a distance is arranged between a GPIO PIN and a ground wire PIN in the detection interface of the POGO PIN structure.
Moreover, the main control unit adopts an NB-IoT module taking BC26 as a core.
Moreover, the voltage comparator employs an SGM8701 module.
The invention has the advantages and positive effects that:
the invention has reasonable design, the main control unit is provided with the immersion detection interface with the GOPO PIN structure and is connected with the voltage comparator, when the GOPO PIN detection interface is immersed in water, the voltage output by the corresponding PIN of the main control unit can be changed due to partial pressure generated by the resistance value of the water, the voltage comparator outputs the voltage with the corresponding magnitude according to the received voltage magnitude, and whether the equipment is immersed is judged according to the magnitude of the voltage output by the voltage comparator, so that the effects of early warning and protecting the equipment can be achieved, and the safe and reliable operation of the underground gas detection equipment of the coal mine can be ensured.
Drawings
FIG. 1 is a diagram of a connection frame of the present invention;
FIG. 2 is a circuit diagram of a portion of the main control unit BC26 according to the present invention;
FIG. 3 is a water immersion detection interface of the POGO PIN structure of the present invention;
fig. 4 is a circuit diagram of the voltage comparator SGM8701 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
A submersion detection circuit suitable for a gas detection device, as shown in fig. 1 to 3, includes a main control unit, a submersion detection interface, a voltage comparator, and a voltage dividing circuit. In this embodiment, the main control unit adopts an NB-IoT module with BC26 as a core, and the main control unit realizes other detection control functions of the downhole gas detection device in addition to the immersion detection function. The voltage comparator adopts an SGM8701 module. The submergence detection interface is the detection interface of POGO PIN structure, and this detection interface connection GPIO2 PIN and a ground wire PIN of main control unit BC26 and lead to outside the gas detection equipment, have a certain distance between GPIO2 PIN and the ground wire PIN.
The specific connection relationship among the main control unit BC26, the voltage comparator SGM8701, and the voltage dividing circuit is as follows: the GPIO2 pin of the main control unit BC26 is configured to be pulled up and connected with a VIN + pin of the voltage comparator SGM8701, the GPIO1 pin of the main control unit BC26 is connected with a VOUT pin of the voltage comparator SGM8701, a + VS pin of the voltage comparator SGM8701 is connected with a 1.8V power supply, a VIN-pin of the voltage comparator SGM8701 is connected with a voltage division circuit, and a-VS pin of the voltage comparator SGM8701 is grounded.
The working principle of the invention is as follows:
taking a voltage domain of 1.8V as an example, the VIN-terminal of the voltage comparator SGM8701 is connected with a voltage dividing circuit, and 1.6V is used as a reference voltage; when the POGO PIN detection interface of the main control unit BC26 is immersed, the GPIO2 PIN of the main control unit BC26 is connected with the ground through water, the water has a resistance value to generate partial voltage to reduce the voltage of the GPIO2 PIN of the main control unit BC26, when the voltage of the GPIO2 PIN of the main control unit BC26 is lower than the VIN-PIN voltage of the voltage comparator SGM8701, the VOUT PIN of the voltage comparator SGM8701 outputs low level, otherwise, high level is output, namely when the GPIO1 PIN of the main control unit BC26 is high level, the GPIO1 PIN of the main control unit BC26 is not immersed, and when the GPIO1 PIN of the main control unit BC26 is low level; different water qualities have different impedances, the magnitude of the reference voltage partial pressure is adjusted according to the conditions, and the circuit can detect whether the water is immersed or not except for pure water, common tap water and water which is more complex than the tap water.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (5)
1. The utility model provides a detection circuitry soaks suitable for gaseous check out test set which characterized in that: the intelligent control device comprises a main control unit, a water immersion detection interface, a voltage comparator and a voltage dividing circuit, wherein the main control unit is connected with the water immersion detection interface through a GPIO pin and a ground wire pin, the GPIO pin is connected with a VIN + pin of the voltage comparator, a VIN-pin of the voltage comparator is connected with the voltage dividing circuit, and a VOUT pin of the voltage comparator is connected with another GPIO pin of the main control unit.
2. The submersion detection circuit suitable for use in a gas detection apparatus according to claim 1, wherein: the detection interface that soaks is POGO PIN structure's detection interface.
3. The submergence detecting circuit adapted for use in a gas detecting apparatus according to claim 2, wherein: and a distance is reserved between a GPIO PIN and a ground wire PIN in the detection interface of the POGO PIN structure.
4. A submersion detection circuit suitable for use in a gas detection apparatus according to any one of claims 1 to 3, wherein: the main control unit adopts an NB-IoT module taking BC26 as a core.
5. A submersion detection circuit suitable for use in a gas detection apparatus according to any one of claims 1 to 3, wherein: the voltage comparator adopts an SGM8701 module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008163.6A CN112179575A (en) | 2020-09-23 | 2020-09-23 | Soaking detection circuit suitable for gas detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008163.6A CN112179575A (en) | 2020-09-23 | 2020-09-23 | Soaking detection circuit suitable for gas detection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112179575A true CN112179575A (en) | 2021-01-05 |
Family
ID=73955310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011008163.6A Pending CN112179575A (en) | 2020-09-23 | 2020-09-23 | Soaking detection circuit suitable for gas detection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112179575A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003248022A (en) * | 2002-02-27 | 2003-09-05 | Niles Parts Co Ltd | Detector for abnormality in comparator |
| CN206057429U (en) * | 2016-08-19 | 2017-03-29 | 吴雯雯 | A kind of dynamic electric voltage measuring circuit of wide scope |
| CN207339979U (en) * | 2017-08-24 | 2018-05-08 | 潍坊歌尔电子有限公司 | A kind of protected against the effects of immersion mobile phone shell and mobile phone |
| CN208488834U (en) * | 2018-03-20 | 2019-02-12 | 潍坊汇金海物联网技术有限公司 | A kind of water logging detection warning device that the service life based on NB-IoT technology is long |
| CN210376502U (en) * | 2019-07-30 | 2020-04-21 | 上海艾为电子技术股份有限公司 | Bidirectional overvoltage detection circuit |
-
2020
- 2020-09-23 CN CN202011008163.6A patent/CN112179575A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003248022A (en) * | 2002-02-27 | 2003-09-05 | Niles Parts Co Ltd | Detector for abnormality in comparator |
| CN206057429U (en) * | 2016-08-19 | 2017-03-29 | 吴雯雯 | A kind of dynamic electric voltage measuring circuit of wide scope |
| CN207339979U (en) * | 2017-08-24 | 2018-05-08 | 潍坊歌尔电子有限公司 | A kind of protected against the effects of immersion mobile phone shell and mobile phone |
| CN208488834U (en) * | 2018-03-20 | 2019-02-12 | 潍坊汇金海物联网技术有限公司 | A kind of water logging detection warning device that the service life based on NB-IoT technology is long |
| CN210376502U (en) * | 2019-07-30 | 2020-04-21 | 上海艾为电子技术股份有限公司 | Bidirectional overvoltage detection circuit |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |