CN204924390U - Detection apparatus for diaphragm type gas table equivalent gyration volume - Google Patents
Detection apparatus for diaphragm type gas table equivalent gyration volume Download PDFInfo
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- CN204924390U CN204924390U CN201520262614.7U CN201520262614U CN204924390U CN 204924390 U CN204924390 U CN 204924390U CN 201520262614 U CN201520262614 U CN 201520262614U CN 204924390 U CN204924390 U CN 204924390U
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- gas meter
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Abstract
The utility model discloses a detection apparatus for diaphragm type gas table equivalent gyration volume, including air inlet, diaphragm type gas literary name wheel counter, diaphragm type gas table counter least count dish cursor, photoelectric sensor, diaphragm type gas table gas outlet, the device still includes hall element, data acquisition module and magnetic element, magnetic element set up on the pendulum rod or bent axle by in being examined the table, hall element pastes and is being examined the lateral surface of table, just with magnetic element on same horizontal plane, hall element's signal output part mouth is connected to the port with data acquisition module's signal reception. Compare with present diaphragm type gas table detection device, this device can conveniently obtain to be examined the equivalent gyration volume of table, has good effect to shortening the diaphragm type gas table minimum flow point examination time greatly, shows the demand that intrinsic error examined and determine fast to the diaphragm type gas in having satisfied the mass production of enterprise.
Description
Technical field
The utility model belongs to diaphragm gas meter error testing technical field, relates to method and the device of a kind of diaphragm gas meter based on Hall element revolution cubing.
Background technology
For having sampled light target diaphragm gas meter, current automatic calibrator is made up of bell-jar or critical flow gas meter standard set-up and photosignal sampling thief mostly.During calibrating, the cursor signal that photosignal sampling thief can be reflected back tested table gathers, process and show that the gas of gas meter, flow meter record flows through volume, and then this value and the actual gas volume value flowing through gas meter, flow meter are compared, the fundamental error of tested table can be obtained.But it is smaller owing to carrying out flow when lower-capacity point is examined and determine, it is very long that gas meter, flow meter carries out one detection period, therefore need to improve Calibration Technology, utility model is a kind of meets the device in enterprise's production in enormous quantities, diaphragm gas meter fundamental error being carried out to rapid verification demand.
In order to solve the problem, some technology propose the method for the revolution volume of diaphragm gas meter as calibrating volume when a kind of lower-capacity point detects, can greatly improve calibrating speed, the key problem in technology of these methods is exactly the equivalent solid of revolution product value how obtaining tested table.
Obtaining the method for equivalent revolution volume for industrial diaphragm gas meter, before adopting a photoelectric sensor to be placed in table, for measuring the reflecting marking on tested literary name wheel type counter least count dish, namely exporting a pulse when reflecting marking often rotates a circle; Another sensor, for detecting the motion conditions of diaphragm gas meter bellows internal round-trip movement parts, when diaphragm gas meter discharges the gas of an equivalent revolution volume completely, exports a pulse.Because two sensors are under same traffic condition, the principle that the error of indication is also identical, sets up equation by the error of indication is equal, accurately calculates the actual solid of revolution product value of this diaphragm gas meter.
Utility model content
The utility model is for for domestic type diaphragm gas meter, and its volume capacity is relatively little, and the to-and-fro movement situation detection difficulty of toggle is comparatively large, therefore proposes a kind of diaphragm gas meter based on Hall element revolution volume measuring method.
A pick-up unit for diaphragm gas meter equivalent revolution volume, comprises air intake opening, diaphragm gas meter character wheel counter, diaphragm gas meter counter least count dish cursor, photoelectric sensor, diaphragm gas meter gas outlet;
This device also comprises Hall element, data acquisition module and magnetic element; Described magnetic element is arranged on fork in tested table or bent axle, and Hall element is attached to the lateral surface of tested table, and is in same level with magnetic element; The signal output port of Hall element is connected to port with the Signal reception of data acquisition module.
Beneficial effect: compared with existing diaphragm gas meter pick-up unit, this device can obtain the equivalent revolution volume of tested table easily, fix time for greatly shortening diaphragm gas meter minimum flow spot check there is good effect, meet during enterprise produces in enormous quantities the demand of diaphragm gas meter fundamental error being carried out to rapid verification.
Accompanying drawing explanation
Fig. 1 is the apparatus structure front view that the utility model obtains tested table revolution volume;
Fig. 2 is the apparatus structure vertical view that the utility model obtains tested table revolution volume;
Fig. 3 is the theory diagram of digital sampling and processing of the present utility model.
Specific embodiments
In order to make the object of this device, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, this device is further elaborated.
As shown in Figure 1, 2, a kind of pick-up unit of diaphragm gas meter equivalent revolution volume, comprises air intake opening 1, diaphragm gas meter character wheel counter 4, diaphragm gas meter counter least count dish cursor 5, photoelectric sensor 6, diaphragm gas meter gas outlet 7; This device also comprises Hall element 2, data acquisition module 3 and magnetic element 8; Described magnetic element 8 is arranged on fork in tested table or bent axle, and Hall element 2 is attached to the lateral surface of tested table, and is in same level with magnetic element 8; The signal output port of Hall element 2 is connected to port with the Signal reception of data acquisition module 3.
Conventional negative pressure method sonic nozzle device is adopted to produce calibrating gas flow, gas enters tested table by diaphragm gas meter air intake opening 1, before photoelectric sensor 6 is placed in table, for measuring the reflecting marking on diaphragm gas meter character wheel counter 4 on least count dish, when reflecting marking often rotates a circle, just produce a pulse.During experiment, Hall element 2 is affixed on tested watch case perpendicular to magnetic sheet place, due to fork to-and-fro movement, there is the regular change repeated in magnetic sheet 8 and Hall element distance, make Hall element export pulse, the output signal of two-way sensor is delivered to digital sampling and processing 3 the obtains tested table again revolution volume cycle by computing machine.Again by two-way sensor signal according to error equal and relevance algorithms carry out analytic operation, obtain the revolution volume equivalent value of tested table.Finally discharged gas is discharged by diaphragm gas meter gas outlet 7.
The measurement of volume is turned round based on Hall element in the utility model, seek the correlativity between Hall element output pulse and diaphragm gas meter revolving meber to-and-fro movement situation, by the analysis to correlativity, calculate the accurate revolution volume of tested table.
As shown in Figure 3, the utility model provides gordian technique to be to obtain hall element output voltage and follow-up data process two parts.Hall voltage output voltage is gathered by digital sampling and processing, obtains tested table and completes the rev volume intake and exhaust time cycle, then according to two timing ratio juris, calculates the equivalent solid of revolution product value of tested table.By error of indication formula, following formula can be derived:
v in formula
mwhen representing large discharge calibrating, the volume indicating value of the tested diaphragm gas meter that photoelectric sensor records; t
mrepresent V
mcorresponding Measuring Time; V
crepresent revolution volume; Equivalent revolution volume number of times when N represents that large-capacity point is examined and determine; t
nrepresent the Measuring Time that N is corresponding.Calculate this diaphragm gas meter accordingly and turn round volume indicating value V accurately
c.
When little magnetic sheet is vertical with Hall element, then in the pair of electrodes that magnetic field is vertical with sense of current, produce Hall voltage
wherein R
hfor hall constant; F is the coefficient relevant with Hall element shape; D is the physical dimension of Hall element; I is the electric current that pair of electrodes is passed through; The magnetic field intensity in B magnetic field residing for Hall element.When controlling current constant, when Hall element during moving displacement, as long as known any non electrical quantity converts change in displacement to, all can be converted to electricity with Hall element in non-uniform magnetic-field.With actual test, theoretical analysis all shows that the gyration of voltage signal and diaphragm gas meter has good correlativity, can represent the gyration period of gas meter, flow meter with the cycle analyzing the voltage signal drawn.
Claims (1)
1. a pick-up unit for diaphragm gas meter equivalent revolution volume, comprises air intake opening, diaphragm gas meter character wheel counter, diaphragm gas meter counter least count dish cursor, photoelectric sensor, diaphragm gas meter gas outlet;
It is characterized in that: this device also comprises Hall element, data acquisition module and magnetic element; Described magnetic element is arranged on fork in tested table or bent axle, and Hall element is attached to the lateral surface of tested table, and is in same level with magnetic element; The signal output port of Hall element is connected to port with the Signal reception of data acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520262614.7U CN204924390U (en) | 2015-04-27 | 2015-04-27 | Detection apparatus for diaphragm type gas table equivalent gyration volume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520262614.7U CN204924390U (en) | 2015-04-27 | 2015-04-27 | Detection apparatus for diaphragm type gas table equivalent gyration volume |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204924390U true CN204924390U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520262614.7U Expired - Fee Related CN204924390U (en) | 2015-04-27 | 2015-04-27 | Detection apparatus for diaphragm type gas table equivalent gyration volume |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841765A (en) * | 2016-05-27 | 2016-08-10 | 中国计量大学 | Diaphragm type gas meter revolution volume acquisition method based on short-time self-correlation algorithm |
| CN109443499A (en) * | 2018-09-07 | 2019-03-08 | 金卡智能集团股份有限公司 | A kind of electronics temperature compensation diaphragm gas meter error of indication dynamic testing method |
| CN113159263A (en) * | 2021-06-03 | 2021-07-23 | 廊坊新奥智能科技有限公司 | Metering method based on photoelectric sensor and Hall sensor |
-
2015
- 2015-04-27 CN CN201520262614.7U patent/CN204924390U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841765A (en) * | 2016-05-27 | 2016-08-10 | 中国计量大学 | Diaphragm type gas meter revolution volume acquisition method based on short-time self-correlation algorithm |
| CN109443499A (en) * | 2018-09-07 | 2019-03-08 | 金卡智能集团股份有限公司 | A kind of electronics temperature compensation diaphragm gas meter error of indication dynamic testing method |
| CN113159263A (en) * | 2021-06-03 | 2021-07-23 | 廊坊新奥智能科技有限公司 | Metering method based on photoelectric sensor and Hall sensor |
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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: 20151230 Termination date: 20170427 |
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| CF01 | Termination of patent right due to non-payment of annual fee |