CN203642972U - Gas flow meter - Google Patents
Gas flow meter Download PDFInfo
- Publication number
- CN203642972U CN203642972U CN201320838726.3U CN201320838726U CN203642972U CN 203642972 U CN203642972 U CN 203642972U CN 201320838726 U CN201320838726 U CN 201320838726U CN 203642972 U CN203642972 U CN 203642972U
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- Prior art keywords
- sensor
- gas meter
- gas flow
- measuring
- tube
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Abstract
The utility model discloses a gas flow meter. The gas flow meter is characterized by comprising a measuring tube, a sensor installing tube and an external constant temperature difference circuit, wherein a cavity is formed in the sensor installing tube, the lower end of the sensor installing tube is inserted in the measuring tube, a first sensor is arranged at the lower end of the sensor installing tube in the gas flowing direction, a second sensor is arranged in the cavity of the sensor installing tube, and the first sensor and the second sensor are electrically connected to the external constant temperature difference circuit. The gas flow meter is simple in structure, convenient to use and capable of effectively eliminating measurement errors caused by a zero point, thereby improving measuring accuracy.
Description
Technical field
The utility model belongs to fields of measurement, is specifically related to a kind of gas meter.
Background technology
The principle of at present general gas meter is, at tube wall, thermal source is set outward, utilize the mobile heat transfer relation of gas, measure the heat of being taken away by gas molecule on thermal source, thereby thereby obtain the gas flow in gas molecule quality unit of account time that correspondence flows through.Existing gas meter generally enters to adopt a measuring sensor, and in actual measurement process, the various factors such as temperature, pressure of gas can exert an influence to the heat transfer coefficient of gas, drifts about zero point thereby make to measure, and has caused the reduction of measuring accuracy.
Summary of the invention
The purpose of this utility model is to provide one and can overcomes above-mentioned defect, can measure in real time power zero point, gets rid of extremely, improves the gas meter of measuring accuracy.
For realizing above-mentioned utility model object, the utility model has adopted following technical scheme:
A kind of gas meter, it is characterized in that, comprise measuring tube, in establish installation of sensors pipe and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe is inserted into measuring tube inside, the lower end of described installation of sensors pipe is provided with first sensor towards gas flow direction, in the cavity of described installation of sensors pipe, be provided with the second sensor, described first sensor and the second sensor are electrically connected in outside constant difference circuit.
As one of preferred version, described first sensor and the second sensor are by a heating element and a temperature element composition.
As one of preferred version, described installation of sensors pipe is fixed on the sidewall of measuring tube.
As one of preferred version, described first sensor and the second sensor are electrically connected at outside constant difference circuit by an analog switch.
As one of preferred version, described first sensor is used for measuring actual gas flow, and described the second sensor is used for measuring value conduct at zero point with reference to value.
As one of preferred version, described measuring tube is pipe or square tube.
Utility model advantage:
Gas meter tool described in the utility model has the following advantages: gas meter described in the utility model is simple in structure, easy to use, can effectively get rid of zero point to measuring the error causing, thereby improve measuring accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of gas meter described in the utility model;
Wherein, 1, measuring tube, 2, installation of sensors pipe, 3, first sensor, 4, the second sensor
Embodiment
Below in conjunction with accompanying drawing and a preferred embodiment, the technical solution of the utility model is further described.
Embodiment:
As shown in Figure 1: a kind of gas meter that the present embodiment discloses, comprise measuring tube 1, in establish installation of sensors pipe 2 and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe 2 is inserted into measuring tube 1 inside, the lower end of described installation of sensors pipe 2 is provided with first sensor 3 towards gas flow direction, in the cavity of described installation of sensors pipe 2, be provided with the second sensor 4, described first sensor 3 and the second sensor 4 are electrically connected at outside constant difference circuit.
As one of preferred version, described first sensor 3 and the second sensor 4 are by a heating element and a temperature element composition.
As one of preferred version, described installation of sensors pipe 2 is fixed on the sidewall of measuring tube 1.
As one of preferred version, described first sensor 3 and the second sensor 4 are electrically connected at outside constant difference circuit by an analog switch.
As one of preferred version, described first sensor 3 is for measuring actual gas flow, and described the second sensor 4 is for measuring value conduct at zero point with reference to value.
As one of preferred version, described measuring tube 1 is pipe or square tube.
It is to be noted; as described above is only in order to explain the preferred embodiment of the utility model; not attempt is done any formal restriction to the utility model according to this; be with; all any modification or changes that has the relevant the utility model of doing under identical utility model spirit, all must be included in the category of the utility model intention protection.
Claims (6)
1. a gas meter, it is characterized in that, comprise measuring tube, in establish installation of sensors pipe and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe is inserted into measuring tube inside, the lower end of described installation of sensors pipe is provided with first sensor towards gas flow direction, in the cavity of described installation of sensors pipe, be provided with the second sensor, described first sensor and the second sensor are electrically connected in outside constant difference circuit.
2. gas meter according to claim 1, is characterized in that, described first sensor and the second sensor are by a heating element and a temperature element composition.
3. gas meter according to claim 2, is characterized in that, described installation of sensors pipe is fixed on the sidewall of measuring tube.
4. gas meter according to claim 3, is characterized in that, described first sensor and the second sensor are electrically connected at outside constant difference circuit by an analog switch.
5. gas meter according to claim 4, is characterized in that, described first sensor is used for measuring actual gas flow, and described the second sensor is used for measuring value conduct at zero point with reference to value.
6. gas meter according to claim 5, is characterized in that, described measuring tube is pipe or square tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838726.3U CN203642972U (en) | 2013-12-18 | 2013-12-18 | Gas flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838726.3U CN203642972U (en) | 2013-12-18 | 2013-12-18 | Gas flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203642972U true CN203642972U (en) | 2014-06-11 |
Family
ID=50874207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320838726.3U Expired - Fee Related CN203642972U (en) | 2013-12-18 | 2013-12-18 | Gas flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203642972U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697955A (en) * | 2013-12-18 | 2014-04-02 | 苏州瑞尔维电子科技有限公司 | Gas flow meter |
| CN106512166A (en) * | 2016-12-30 | 2017-03-22 | 深圳市普博科技有限公司 | Setting method and device of tidal volume of anaesthesia machine |
-
2013
- 2013-12-18 CN CN201320838726.3U patent/CN203642972U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697955A (en) * | 2013-12-18 | 2014-04-02 | 苏州瑞尔维电子科技有限公司 | Gas flow meter |
| CN106512166A (en) * | 2016-12-30 | 2017-03-22 | 深圳市普博科技有限公司 | Setting method and device of tidal volume of anaesthesia machine |
| CN106512166B (en) * | 2016-12-30 | 2019-01-11 | 深圳市普博科技有限公司 | The setting method and device of anesthesia apparatus tidal volume |
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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: 20140611 Termination date: 20141218 |
|
| EXPY | Termination of patent right or utility model |