CN203706365U - Alarm detector used for poisonous gases - Google Patents
Alarm detector used for poisonous gases Download PDFInfo
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- CN203706365U CN203706365U CN201420055590.3U CN201420055590U CN203706365U CN 203706365 U CN203706365 U CN 203706365U CN 201420055590 U CN201420055590 U CN 201420055590U CN 203706365 U CN203706365 U CN 203706365U
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Abstract
The utility model relates to an alarm detector used for poisonous gases. The alarm detector comprises a detector body with a built-in CPU. The alarm detector is characterized in that, the detector body is connected with a detachable sensor assembly; The sensor assembly comprises a sensor packaged in a bottom box, a signal conversion unit used for converting a current signal obtained by the sensor into a voltage signal and a transferring unit used for storing rating data of the sensor. The output end of the sensor is connected with the signal conversion unit. The signal conversion unit is connected with an A/D conversion unit connected with the CPU in the detector body through the transferring unit. When the alarm detector needs to be updated, only the sensor assembly needs to be changed, the whole alarm detector does not need to be changed, and the updating problem of an existing alarm detector is solved.
Description
Technical field
The utility model relates to a kind of alarm detector for toxic gas.
Background technology
No matter toxic gas alarm detector is in daily life; or in commercial production, all bringing into play vital effect; toxic and harmful in Measurement accuracy surrounding environment is revealed, significant to the protection people's healthy and property safety.In many fields of national economy, as being widely used in the enterprises such as oil field, mine, chemical industry and family, be also the big event of environmental protection.
Electrochemical sensor is by carrying out work to the electric signal that tested gas reacts and generation is directly proportional to gas concentration.Typical electrochemical sensor is made up of sensing electrode (or working electrode) and counter electrode, and is separated by a thin electrolyte layers.First gas react by the small perforate of hollow billet type and sensor, is then hydrophobic barrier layer, finally arrives electrode surface.Adopt and can allow in this way proper amount of gas and sensing electrode to react, to form sufficient electric signal, prevent that electrolyte from spilling sensor simultaneously.Gas and sensing electrode through barrier diffusion react, and sensing electrode can adopt oxidation mechanism or reduction mechanism.These reactions are carried out catalysis by the electrode material designing for tested gas.By the resistor connecting between electrode, the electric current being directly proportional to tested gas concentration can flow between positive pole and negative pole.Measure this electric current and can determine gas concentration.Due to meeting generation current in this process, electrochemical sensor is often called as again electric current gas sensor or micro fuel cell.In practice, answer because electrode surface recurs electrification, it is constant that sensing electrode electromotive force can not keep, and after one period of long period, it can cause sensor performance to be degenerated.For improving sensor performance, people have introduced reference electrode.Reference electrode is arranged in electrolyte, contiguous with sensing electrode.Fixing stable permanent electromotive force acts on sensing electrode.Reference electrode can keep this fixed voltage value on sensing electrode.Between reference electrode, there is no current flowing.Gas molecule and sensing electrode react, and measure counter electrode simultaneously, and measurement result is conventionally directly related with gas concentration.The magnitude of voltage that puts on sensing electrode can make sensor tip to object gas.
The shortcoming of existing toxic gas alarm detector is to upgrade trouble, mainly contains following shortcoming:
The first, the expected life of sensor is 12 to 24 months under normal condition.But the expected life of sensor depends on the humidity of environmental pollution, temperature and exposure thereof to a great extent in real work, thereby greatly affect the serviceable life of sensor.When renewal, whole detector is changed or dismantled to more emat sensor demarcation again again of production unit.So not only waste time and energy, also cause unnecessary waste.
The second, at the scene original state under, while needing for some reason to change probe gas kind, original detector can only be changed to corresponding gas kind, cause unnecessary loss.
Summary of the invention
The purpose of this utility model is to provide the more easy toxic gas alarm detector of a kind of renewal.
In order to achieve the above object, the technical solution of the utility model has been to provide a kind of alarm detector for toxic gas, comprise the detector body that is built-in with CPU, it is characterized in that: detector body is connected with dismountable sensor module, this sensor module comprises the sensor being encapsulated in end box, for the current signal being obtained by sensor being converted to the signal conversion unit of voltage signal and the adapter unit for the nominal data of storage sensor, the output terminal of sensor connects signal conversion unit, signal conversion unit connects the A/D converting unit being connected with CPU in detector body via adapter unit.
Preferably, described adapter unit at least comprises the storage unit of the nominal data for storing described sensor.
If desired while upgrading the alarm detector that the utility model provides, only need to change sensor module, need not change whole alarm detector, the renewal that has solved original alarm detector bothers.
Brief description of the drawings
The schematic diagram of a kind of alarm detector for toxic gas that Fig. 1 provides for the utility model.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
As shown in Figure 1, a kind of alarm detector for toxic gas that the utility model provides, comprises and is built-in with detector body 1, detector body 1 is built-in with mainboard, and this mainboard has the necessary components and parts of original alarm detector such as CPU, A/D converting unit.Detector body 1 is connected with dismountable sensor module.Between sensor module and detector body 1, be connected the form that can adopt connector, those skilled in the art also can adopt other types of attachment certainly, but must ensure between the mainboard in sensor module and detector body 1 to be that circuit communicates.
This sensor module comprises the sensor 3, signal conversion unit 4 and the adapter unit 5 that are encapsulated in end box 2.Signal conversion unit 4 for by sensor 3 by converting the voltage signal of adaptation to the current signal that tested gas reacts and generation is directly proportional to gas concentration, those skilled in the art can also be as required, increase again a signal amplification unit, after voltage signal is amplified, transmit.5 of adapter units at least comprise a storage unit, contain the flag data of sensor 3 in this memory cell, after sensor module is connected with detector body 1, the CPU of detector body 1 reads this nominal data, thereby sensor 3 can normally be worked.Meanwhile, voltage signal that signal conversion unit 4 provides is admitted to the A/D converting unit on the mainboard in detector body 1 through adapter unit 5, sends into CPU after being converted to digital signal again.
Claims (2)
1. the alarm detector for toxic gas, comprise the detector body (1) that is built-in with CPU, it is characterized in that: detector body (1) is connected with dismountable sensor module, this sensor module comprises the sensor (3) being encapsulated in end box (2), for the current signal being obtained by sensor (3) being converted to the signal conversion unit (4) of voltage signal and the adapter unit (5) for the nominal data of storage sensor (3), the output terminal of sensor (3) connects signal conversion unit (4), signal conversion unit (4) connects the A/D converting unit being connected with CPU in detector body (1) via adapter unit (5).
2. a kind of alarm detector for toxic gas as claimed in claim 1, is characterized in that: described adapter unit (5) at least comprises the storage unit of the nominal data for storing described sensor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055590.3U CN203706365U (en) | 2014-01-28 | 2014-01-28 | Alarm detector used for poisonous gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420055590.3U CN203706365U (en) | 2014-01-28 | 2014-01-28 | Alarm detector used for poisonous gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203706365U true CN203706365U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420055590.3U Expired - Fee Related CN203706365U (en) | 2014-01-28 | 2014-01-28 | Alarm detector used for poisonous gases |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203706365U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109961554A (en) * | 2017-12-22 | 2019-07-02 | Ci技术传感器公司 | The method of system and the camera for replacing this system with processing unit and the camera being attached to |
-
2014
- 2014-01-28 CN CN201420055590.3U patent/CN203706365U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109961554A (en) * | 2017-12-22 | 2019-07-02 | Ci技术传感器公司 | The method of system and the camera for replacing this system with processing unit and the camera being attached to |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20210128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |