CN201637707U - Methane sensor - Google Patents
Methane sensor Download PDFInfo
- Publication number
- CN201637707U CN201637707U CN2010200001425U CN201020000142U CN201637707U CN 201637707 U CN201637707 U CN 201637707U CN 2010200001425 U CN2010200001425 U CN 2010200001425U CN 201020000142 U CN201020000142 U CN 201020000142U CN 201637707 U CN201637707 U CN 201637707U
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- electric bridge
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- methane transducer
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Abstract
The utility model relates to a methane sensor which comprises an information control processing unit, a power supply converting unit, a data collecting unit, a display unit, an alarm unit, a remote-controlled keyboard input unit and an output control unit. The power supply converting unit supplies power for the methane sensor; the data collecting unit, the display unit, the alarm unit, the remote-controlled keyboard input unit and the output control unit are connected with the information control processing unit; the data collecting unit comprises a sensitive contact and an A/D converter connected with the sensitive contact; the sensitive contact is composed of black and white carrier catalyzing elements, the black and white carrier catalyzing elements are connected into one arm of an electrical bridge in series, an adjusting resistor forms the other arm of the electrical bridge, and the power supply converting unit supplies power for the two ends of the electrical bridge. The methane sensor has the characteristics of simple structure, low cost, high detecting precision, good stability and high reliability; in addition, the automatic adjusting of the methane sensor is realized.
Description
Technical field
The utility model relates to a kind of mining gas content pick-up unit, particularly a kind of methane transducer that is used to detect methane gas content.
Background technology
In the process of mining; under mine, produce great number of flammable gas through regular meeting; especially methane; if these inflammable gass are not in time removed, and various consumers work under the ore deposit, after surpassing certain content; very likely the small electric spark that is produced by various consumers is ignited; thereby produce great industrial accident, so not only national economy has been caused great loss, the more important thing is that miner's life security has been subjected to great threat.A kind of methane transducer that utilizes the pulse detection methane concentration is arranged now, use single-chip microcomputer that responsive contact is constantly applied pulse, export the content of judging methane gas by the pulse that detects responsive contact, yet, this kind methane transducer need be judged by the mode of contrast waveform, because its hardware configuration is limit, must realize by writing a large amount of red tapes, thereby cause cost to strengthen, and be subject to signal and disturb, have that reliability is lower, serviceable life short, poor work stability and adjustment proofread and correct frequent shortcoming.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, provides that a kind of new-type structure operation is simple, reliability is high, lower-cost methane transducer.
The technical solution of the utility model is: a kind of methane transducer, comprise information Control processing unit, power conversion unit for the methane transducer power supply, handle the data acquisition unit that the unit joins with information Control, display unit, alarm unit, remote keypad input block and output control unit, described data acquisition unit comprises responsive contact and the A/D converter that joins with responsive contact, described responsive contact is made up of the carrier catalyst element black-and-white component, the black-and-white component series connection is as an arm of electric bridge, regulate another arm that resistance constitutes electric bridge, the electric bridge two ends power by power conversion unit.
Preferably: described electric bridge two ends join by holding circuit and power conversion unit.
Preferably: described adjusting resistance is digital regulation resistance, handles the control that the unit is subjected to the remote keypad input block by information Control.
Preferably: described alarm unit is set to acousto-optic warning unit, comprises hummer and luminotron.
The beneficial effects of the utility model are: the responsive contact of the utility model is made up of black-and-white component, the black-and-white component series connection is as an arm of electric bridge, regulate another arm that resistance constitutes electric bridge, the electric bridge two ends add stable voltage, when the air that contains methane under the effect of high temperature and platinum black catalyst, flameless burning takes place, on white element, then do not make methyl hydride combustion, thereby the temperature that makes black element is than white element height, thereby the resistance change is big, and the voltage drop on the black element increases, and the electric bridge out of trim changes output voltage, A/D converter is sent to information Control with detected information and handles the unit, thereby the output control signal is controlled.The utility model is simple in structure, and cost is low, accuracy of detection height, stability and reliability height, and the automatic adjustment of realization sensor.
Description of drawings
Fig. 1 is a theory diagram of the present utility model
Fig. 2 is the structural representation of the responsive contact of the utility model
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model:
A kind of methane transducer, comprise the power conversion unit that information Control is handled the unit, powered for methane transducer, handle data acquisition unit, display unit, alarm unit, remote keypad input block and the output control unit that the unit joins with information Control, described data acquisition unit comprises responsive contact and the A/D converter that joins with responsive contact, described responsive contact is made up of the carrier catalyst element black-and-white component, the black-and-white component series connection is as an arm of electric bridge, regulate another arm that resistance constitutes electric bridge, the electric bridge two ends power by power conversion unit.Described electric bridge two ends join by holding circuit and power conversion unit.Described adjusting resistance is digital regulation resistance, handles the control that the unit is subjected to the remote keypad input block by information Control.Described alarm unit is set to acousto-optic warning unit, comprises hummer and luminotron.
As shown in Figure 1 and Figure 2, it is the intelligence system of CPU with the AT89LV52 single-chip microcomputer that methane transducer is one, and adopts the 3.3V low voltage power supply.Methane concentration adopts thermocatalysis principle, carrier catalyst element and adjusting resistance are formed Wheatstone bridge, when the methane in the environment enters air chamber with diffusion way, react with sensitive element, electric bridge has and the corresponding electric signal output of methane concentration, this signal is delivered to single-chip microcomputer 89LV52 and is carried out data processing after A/D converter conversion, function such as finish demonstration, report to the police, cut off the electricity supply.
The AT89LV52 single-chip microcomputer that methane transducer adopts has the RAM of 256 bytes in the chip, program storage in sheet, the program space of total 8K byte, the data write exchange can be carried out with the outside easily in three groups of parallel ports.
Electricity can be wiped data-carrier store and be used for preserving data after the power down, adopts 25045 chips, and its memory space is 128 bytes, and data can be preserved 100 years after the power down, and erasable number of times is 100,000 times.25045 have auto-reset function simultaneously, and when the unexpected deadlock of CPU, 25045 can send the reset enable signal cpu reset automatically.
Methane transducer adopts digital regulation resistance, does not need manually to carry out hardware adjustment, by " zeroising " and " accent sensitivity " function that button or telepilot are selected, is in course of adjustment and can selects best digital regulation resistance value automatically.
Responsive contact is made up of black-and-white component, and the black-and-white component series connection is regulated another arm that resistance constitutes electric bridge as an arm of electric bridge.The electric bridge two ends add stable voltage U (3V), when the air that contains methane under the effect of high temperature and platinum black catalyst, flameless burning takes place, on white element, then do not make methyl hydride combustion, thereby the temperature that makes black element is than white element height.Platinum filament in the black element be heating element be again the thermal sensing element of temperature sensor.According to the characteristic of the positive temperature coefficient (PTC) of platinum filament, resistance was big when temperature was high, and the voltage drop on the black element increases, and the electric bridge out of trim changes output voltage U 1.
When methane concentration changed, the bridge circuit of being made up of responsive contact produced change in voltage, and sample circuit and A/D change-over circuit change voltage with this, are converted into digital signal, export to CPU, record the methane concentration value thus.The A/D conversion is with 10 bits serial A/D converter TLV1549.
When the methane concentration that measures reached alarm set point, hummer and luminotron produced sound and light alarm, when the methane concentration that measures arrives the outage point, also exported outage control signal (5mA current signal) simultaneously except that sound and light alarm.
4 LED numerals show, show measurement value sensor.Can check the information such as the digital regulation resistance value of setting, alarming value, power-down value, telegram in reply value of sensor by demonstration.
On the sensor mainboard, have button, can carry out zeroising, transfer sensitivity, feature operations such as controlling alarm point are set by button.Infrared remote control assembly and CPU direct decoding technology are adopted in remote control, with remote control alignment sensor display window (distance is in 3 meters), by the button on the telepilot can realize with mainboard on the same function of button.
Claims (4)
1. methane transducer, comprise information Control processing unit, power conversion unit for the methane transducer power supply, handle the data acquisition unit that the unit joins with information Control, display unit, alarm unit, remote keypad input block and output control unit, it is characterized in that: described data acquisition unit comprises responsive contact and the A/D converter that joins with responsive contact, described responsive contact is made up of the carrier catalyst element black-and-white component, the black-and-white component series connection is as an arm of electric bridge, regulate another arm that resistance constitutes electric bridge, the electric bridge two ends power by power conversion unit.
2. methane transducer as claimed in claim 1 is characterized in that: described electric bridge two ends join by holding circuit and power conversion unit.
3. methane transducer as claimed in claim 1 is characterized in that: described adjusting resistance is digital regulation resistance, handles the control that the unit is subjected to the remote keypad input block by information Control.
4. methane transducer as claimed in claim 1 is characterized in that: described alarm unit is set to acousto-optic warning unit, comprises hummer and luminotron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200001425U CN201637707U (en) | 2010-01-06 | 2010-01-06 | Methane sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200001425U CN201637707U (en) | 2010-01-06 | 2010-01-06 | Methane sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637707U true CN201637707U (en) | 2010-11-17 |
Family
ID=43082211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200001425U Expired - Lifetime CN201637707U (en) | 2010-01-06 | 2010-01-06 | Methane sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637707U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137024A (en) * | 2014-06-03 | 2015-12-09 | 江苏安泰机电科技有限公司 | Combustible gas sensor |
| CN107966544A (en) * | 2017-12-26 | 2018-04-27 | 重庆光可巡科技有限公司 | Avoid the correction system of the combustible gas probe of manual synchronizing |
-
2010
- 2010-01-06 CN CN2010200001425U patent/CN201637707U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137024A (en) * | 2014-06-03 | 2015-12-09 | 江苏安泰机电科技有限公司 | Combustible gas sensor |
| CN107966544A (en) * | 2017-12-26 | 2018-04-27 | 重庆光可巡科技有限公司 | Avoid the correction system of the combustible gas probe of manual synchronizing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 266400 2299 Hai Xi Road, Huangdao District, Qingdao, Shandong Patentee after: Huaxia Tianxin intellectual property Limited by Share Ltd Address before: 266400 No. 176 Haixi Road, Jiaonan economic and Technological Development Zone, Qingdao, Shandong Patentee before: Qingdao Tianxin Electric Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |