CN211263273U - Semiconductor gas sensor capable of controlling temperature - Google Patents
Semiconductor gas sensor capable of controlling temperature Download PDFInfo
- Publication number
- CN211263273U CN211263273U CN201921150708.XU CN201921150708U CN211263273U CN 211263273 U CN211263273 U CN 211263273U CN 201921150708 U CN201921150708 U CN 201921150708U CN 211263273 U CN211263273 U CN 211263273U
- Authority
- CN
- China
- Prior art keywords
- semiconductor
- packaging shell
- gas sensor
- electric heat
- heat spare
- 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
Abstract
The utility model discloses a semiconductor gas sensor that can control temperature, including packaging shell and semiconductor, the semiconductor is arranged in the packaging shell and its both ends draw forth binding post extremely respectively outside the packaging shell, semiconductor gas sensor is still including arranging in electric heat spare in the packaging shell, electric heat spare is close to but contactless the semiconductor, binding post extremely is drawn forth respectively at the both ends of electric heat spare outside the packaging shell. The utility model discloses a set up the electric heat spare in the packaging shell of sensor, can realize heating the environment that semiconductor locates in the packaging shell through the mode of external control electric heat spare power and realize constant temperature work purpose to make it keep the inside best operating temperature of packaging shell when externally low temperature environment, and then realize the purpose of accurate gas concentration such as detection formaldehyde under low temperature environment.
Description
Technical Field
The utility model relates to a gaseous sensor that detects especially relates to a semiconductor gas sensor that can control temperature.
Background
The gas sensor is a sensing device for converting the information of the components, concentration and the like of gas into information which can be utilized by personnel, instruments, computers and the like and is identified by users, and is commonly used for detecting toxic and harmful gases, such as formaldehyde and the like. The gas sensor may be classified into a semiconductor gas sensor, an electrochemical gas sensor, a catalytic combustion gas sensor, a thermal conductivity gas sensor, an infrared gas sensor, a solid electrolyte gas sensor, and the like according to the detection method.
Formaldehyde detection is most commonly performed by electrochemical gas sensors, chemical methods (chemical reagent detection) or instrumental methods (instrumental detection such as chromatography). The methods all have respective defects, relatively speaking, the semiconductor gas sensor is most suitable for detecting formaldehyde at present, the semiconductor gas sensor is a gas sensor using a semiconductor gas sensitive element as a sensitive element, the semiconductor gas sensor is widely applied to combustible gas leakage detection devices of families and factories, the semiconductor gas sensor is suitable for detecting methane, liquefied gas, hydrogen and the like, and the semiconductor gas sensor is less suitable for detecting formaldehyde at present.
However, if the conventional semiconductor gas sensor is directly used for detecting special gases such as formaldehyde, the internal temperature of the sensor cannot be controlled, and the optimal working temperature of the semiconductor sensor is 125 ± 10 ℃, so that the accurate detection of the gas sensor in different use environments is difficult to realize, for example, the detection accuracy is obviously reduced at a temperature of several degrees or even below zero.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solve the above problems and to provide a semiconductor gas sensor capable of controlling temperature, which can realize accurate detection in a low temperature environment.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the semiconductor gas sensor capable of controlling the temperature comprises a packaging shell and a semiconductor, wherein the semiconductor is arranged in the packaging shell, and two ends of the semiconductor are respectively led out of a wiring terminal to the outside of the packaging shell. According to actual needs, the electric heating piece can be an electric heating plate or an electric heating wire, and the like, as long as a good electric heating function can be realized and the installation is convenient.
Specifically, the semiconductor is a metal oxide semiconductor.
The beneficial effects of the utility model reside in that:
the utility model discloses a set up the electric heat spare in the packaging shell of sensor, can realize heating the environment that semiconductor locates in the packaging shell through the mode of external control electric heat spare power and realize constant temperature work purpose to make it keep the inside best operating temperature of packaging shell when externally low temperature environment, and then realize the purpose of accurate gas concentration such as detection formaldehyde under low temperature environment.
Drawings
FIG. 1 is a schematic structural diagram of a temperature-controllable semiconductor gas sensor according to the present invention, showing an internal structure;
fig. 2 is a schematic structural diagram of the temperature-controllable semiconductor gas sensor according to the present invention, showing an internal structure of the semiconductor gas sensor.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in FIG. 1, semiconductor gas sensor that can control temperature includes packaging shell 6, metal oxide semiconductor 7 and electric heat spare 5, and metal oxide semiconductor 7 and electric heat spare 5 are all arranged in packaging shell 6, and outside binding post 3, 4 to packaging shell 6 were drawn forth respectively at metal oxide semiconductor 7's both ends, and outside binding post 1, 2 to packaging shell 6 were drawn forth respectively at electric heat spare 5's both ends, electric heat spare 5 was close to but does not contact metal oxide semiconductor 7. The electric heating element 5 can be an electric heating plate or an electric heating wire, etc. according to actual needs.
As shown in fig. 2, in application, if the device is in a low-temperature environment, the two terminals 1 and 2 of the electric heating element 5 are connected with a heating power supply VH, the two terminals 3 and 4 of the metal oxide semiconductor 7 are connected with a voltage dividing resistor R1 in series and then connected with a sensor power supply VC, and the sensor power supply VC is a constant voltage and can be generated by a common voltage reference source; the heating can be realized by controlling the VH of the heating power supply to output 2V to 3V voltage by using a controller (not shown, conventional components and conventional control means), and the purpose of keeping the internal temperature of the packaging shell 6 at 125 ℃ ± 10 ℃ can be easily realized according to the external environment temperature, the voltage of the heating power supply and the heating time; the resistance value of the metal oxide semiconductor 7 can be easily calculated by collecting the voltage VO at the two ends of the voltage dividing resistor R1, and the gas concentration value can be obtained by conversion. The heating power supply VH can also obtain a voltage of 2V-3V after dividing the voltage VC by a resistor.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (2)
1. The utility model provides a semiconductor gas sensor that can control temperature, includes encapsulation casing and semiconductor, the semiconductor is arranged in the encapsulation casing and its both ends draw forth binding post respectively to outside the encapsulation casing, its characterized in that: the semiconductor packaging structure further comprises an electric heating piece arranged in the packaging shell, the electric heating piece is close to but not in contact with the semiconductor, and wiring terminals are respectively led out of two ends of the electric heating piece and are arranged outside the packaging shell.
2. The temperature-controllable semiconductor gas sensor according to claim 1, wherein: the semiconductor is a metal oxide semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150708.XU CN211263273U (en) | 2019-07-22 | 2019-07-22 | Semiconductor gas sensor capable of controlling temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150708.XU CN211263273U (en) | 2019-07-22 | 2019-07-22 | Semiconductor gas sensor capable of controlling temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211263273U true CN211263273U (en) | 2020-08-14 |
Family
ID=71987683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921150708.XU Active CN211263273U (en) | 2019-07-22 | 2019-07-22 | Semiconductor gas sensor capable of controlling temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211263273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198197A (en) * | 2020-10-13 | 2021-01-08 | 海南聚能科技创新研究院有限公司 | Formaldehyde gas sensor module |
-
2019
- 2019-07-22 CN CN201921150708.XU patent/CN211263273U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198197A (en) * | 2020-10-13 | 2021-01-08 | 海南聚能科技创新研究院有限公司 | Formaldehyde gas sensor module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Akbar et al. | High‐temperature ceramic gas sensors: a review | |
| CN108918602A (en) | A kind of semiconductor gas sensor Performance Test System and test method | |
| Spirjakin et al. | Wireless multi-sensor gas platform for environmental monitoring | |
| CN104965009A (en) | Hydrogen concentration detector | |
| CN211263273U (en) | Semiconductor gas sensor capable of controlling temperature | |
| Mukundan et al. | Nitrogen oxide sensors based on yttria-stabilized zirconia electrolyte and oxide electrodes | |
| CN202256247U (en) | Multifunction handheld harmful gas detector | |
| CN210465319U (en) | Thermal conductivity gas analyzer | |
| CN204188558U (en) | For the high precision multiple gases testing circuit of semiconductor gas sensor | |
| CN205334276U (en) | Environment intelligence observing and controlling system of archive office | |
| WO2017034071A1 (en) | Gas detector and re-calibration method thereof | |
| CN213148221U (en) | Palladium alloy film hydrogen sensor | |
| CN102243195A (en) | A resistance-type nitrogen dioxide gas sensor, and an apparatus manufactured with the sensor | |
| CN202049126U (en) | Resistance type nitrogen dioxide sensor and instrument manufactured by same | |
| Lozano et al. | Personal electronic systems for citizen measurements of air quality | |
| CN209541790U (en) | A kind of pipeline thread installing type Temperature Humidity Sensor | |
| Nagirnyak et al. | Ways for improvement selectivity of semiconductor gas sensors | |
| CN201637707U (en) | Methane sensor | |
| CN201555900U (en) | Device for testing steady state thermal resistance and junction temperature of micro-single-phase full-wave bridge rectifier | |
| CN204666521U (en) | A kind of microcomputer sulphur chlorine analyzers | |
| Shuaishuai et al. | Research Status and Progress of Oxygen Sensor | |
| CN217605788U (en) | Poisonous and harmful gas detection device | |
| CN106198679B (en) | Lambda sensor with electrochemical protection mode | |
| CN213875511U (en) | Hydrogen concentration monitoring circuit based on Wheatstone bridge | |
| CN201159726Y (en) | Titanium oxide type oxygen sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |