CN107367312B - Air flow meter testing method - Google Patents
Air flow meter testing method Download PDFInfo
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- CN107367312B CN107367312B CN201710507566.7A CN201710507566A CN107367312B CN 107367312 B CN107367312 B CN 107367312B CN 201710507566 A CN201710507566 A CN 201710507566A CN 107367312 B CN107367312 B CN 107367312B
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- air flow
- flow meter
- pipeline
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- wind speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
Abstract
The invention discloses an air flow meter testing method, which comprises the steps of controlling a first movable pipeline section and a second movable pipeline section to move through an adjusting cylinder so as to clamp a standard air flow meter and an air flow meter to be tested at corresponding positions; starting a fan, enabling wind to enter a test pipeline through an air compressor, respectively detecting wind speed signals of an inlet section and an outlet section of the test pipeline by a first wind speed detector and a second wind speed detector, outputting the signals to a controller, and identifying the wind speed signals by the controller; and if the wind speed signals are the same, starting to collect data such as output voltage, working current and the like of the standard air flow meter and the air flow meter to be detected, outputting the data to a display for displaying, and performing comparative analysis to judge whether the product performance is good or not. The air flow meter testing method has the advantages of good stability, high accuracy, convenience and quickness in operation and adjustment, applicability to detection of various air flow meters, strong universality and better application prospect.
Description
Technical Field
The invention belongs to the technical field of detection devices, and particularly relates to a test method of an air flow meter.
Background
The air mass flow meter is a key component in an electronic control system of an automobile engine, and is used for measuring the mass flow of air entering the engine. In the prior art, the testing method for detecting the air flow meter has the defects of large detection error, poor wind speed stability, poor universality, inconvenience in use and the like, and needs to be further optimized and improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides the air flow meter testing method which is high in testing effectiveness and good in universality.
In order to achieve the purpose, the invention adopts the technical scheme that: the provided air flow meter testing method is characterized in that: the method comprises the following steps:
controlling the first movable pipeline section and the second movable pipeline section to move through the adjusting cylinder so as to clamp the standard air flow meter and the air flow meter to be tested at corresponding positions;
starting a fan, enabling wind to enter a test pipeline through an air compressor, respectively detecting wind speed signals of an inlet section and an outlet section of the test pipeline by a first wind speed detector and a second wind speed detector, outputting the signals to a controller, and identifying the wind speed signals by the controller; if the wind speed signals are the same, starting to collect data such as output voltage, working current and the like of the standard air flow meter and the air flow meter to be detected, outputting the data to a display for displaying, and performing comparative analysis to judge whether the product performance is good or not; if the wind speed of the outlet section is low, a vacuum device arranged behind the outlet section of the pipeline can be started through control to assist in increasing the wind speed of the rear section, after the wind speed in the whole test pipeline is stable, data such as output voltage and working current of the standard air flow meter and the air flow meter to be tested are started to be collected and output to a display to be displayed, and the product performance is judged through comparative analysis.
In order to make the technical scheme more detailed and concrete, the invention also provides the following further preferable technical scheme to obtain satisfactory practical effect:
the air pressure device and the vacuum device are externally connected with an air source capable of controlling and adjusting pressure.
The fan is connected with a frequency converter for controlling the rotating speed of the fan.
Compared with the prior art, the invention has the following advantages: the air flow meter testing method has the advantages of good stability, high accuracy, convenience and quickness in operation and adjustment, applicability to detection of various air flow meters, strong universality and better application prospect.
Drawings
The contents of the drawings and the reference numerals in the drawings of the present specification will be briefly described as follows:
FIG. 1 is a schematic diagram of a test system according to the present invention;
FIG. 2 is a schematic diagram of a test system according to the present invention.
Labeled as: 1. the device comprises a pipeline inlet section, a standard air flow meter, a first movable pipeline section, a supporting seat, a telescopic pipeline section, a regulating cylinder, a second movable pipeline section, a pipeline outlet section, a fan, an air compressor, a vacuum device, a first air speed detector, a second air speed detector, a third air speed detector, a fourth air speed detector, a fifth air speed detector, a sixth air speed detector, a fifth air speed detector, a sixth.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
When the air flow meter testing system is used, the first movable pipeline section 3 and the second movable pipeline section 7 are controlled to move through the adjusting cylinder 6, so that the standard air flow meter 2 and the air flow meter 8 to be tested are clamped at corresponding positions, and accurate and stable rated connection is ensured; starting a fan, enabling wind to enter a test pipeline through an air compressor 11, respectively detecting wind speed signals of an inlet section and an outlet section of the test pipeline by a first wind speed detector 13 and a second wind speed detector 14, outputting the signals to a controller, identifying the wind speed signals by the controller, and starting and collecting data such as output voltage and working current of a standard air flow meter 2 and an air flow meter 8 to be tested if the wind speed signals are the same, outputting the data to a display for displaying, and performing comparative analysis to judge whether the product performance is good or not; if the wind speed of the outlet section is small, the vacuum device 12 arranged behind the outlet section of the pipeline can be started through control to assist in increasing the wind speed of the rear section, after the wind speed in the whole test pipeline is stable, data such as output voltage and working current of the standard air flow meter 2 and the air flow meter 8 to be tested are started to be collected and output to a display to be displayed, and the product performance is judged through comparative analysis.
In the present invention, the fan 10 is connected to a frequency converter for controlling the rotational speed thereof to control the air flow rate in the pipeline. In the testing process, the air flow can be adjusted through the frequency converter, the air speed is increased through the air compressor, and the air speed in the whole testing pipeline is stable through adjustment and control of the air compressor, so that a stable and effective testing result is obtained.
The test system of the air flow meter test method of the invention, as shown in figure 1, comprises a fan 10, a test pipeline and a control box, wherein a standard air flow meter 2 and an air flow meter 8 to be tested are movably clamped in the test pipeline. The testing pipeline comprises a pipeline inlet section 1 and a pipeline outlet section 9, an air compressor 11 is arranged between the air fan 10 and the pipeline inlet section 1, a vacuum device 12 is arranged behind the pipeline outlet section 9, and a first wind speed detector 13 and a second wind speed detector 14 are respectively arranged on the pipeline inlet section 1 and the pipeline outlet section 9. The control box collects signals of the standard air flow meter 2 and the air flow meter 8 to be detected and outputs the signals to the display for displaying and comparing, and the first wind speed detector 13 and the second wind speed detector 14 are connected with the output wind speed signal to the control box.
According to the air flow meter testing system, the air compressor is arranged in front of the testing pipeline, air is compressed by the air compressor to supply air so as to increase the wind speed, and the consistency of the wind speed around the testing pipeline is ensured. The vacuum device 12 is arranged behind the pipeline outlet section 9, and during testing, if the first wind speed detector 13 and the second wind speed detector 14 detect that the wind speeds of the pipeline inlet section 1 and the pipeline outlet section 9 are different, the vacuum device 12 arranged behind the pipeline outlet section can be started through control to adjust and control the wind speed of the rear section, so that the wind speeds in the testing pipeline are kept as consistent as possible, and the accuracy and effectiveness of the testing are improved.
In the invention, the air compressor 11 and the vacuum 12 are externally connected with air sources capable of controlling and adjusting pressure so as to control and adjust the pressure of the air compressor 11 and the vacuum 12, and further control and adjust the air speed in the pipeline.
In the air flow meter testing system of the present invention, as shown in fig. 2, the testing pipeline includes a pipeline inlet section 1 and a pipeline outlet section 9 disposed at both ends, and a clamping pipeline section disposed at the middle part and respectively matched with the pipeline inlet section 1 and the pipeline outlet section 9 to fixedly clamp the standard air flow meter 2 and the air flow meter 8 to be tested. In the invention, the clamping pipeline section comprises a first movable pipeline section 3 and a second movable pipeline section 7, and a driving mechanism which can drive the first movable pipeline section 3 and the second movable pipeline section 7 to respectively move towards the pipeline inlet section 1 and the pipeline outlet section 2 is arranged between the first movable pipeline section 3 and the second movable pipeline section 7. The fixed standard air flow meter 2 of adjustable centre gripping between pipeline import section 1 and first movable pipeline section 3 promptly, the second movable pipeline section 7 with pipeline export section 2 between adjustable centre gripping air flow meter 8 that awaits measuring to make this air flow meter testing arrangement satisfy multiple air flow meter's test requirement, convenient to use is swift, be convenient for control, the suitability is good.
In the invention, the driving mechanism comprises a telescopic pipeline section 5 which is in butt joint between a first movable pipeline section 3 and a second movable pipeline section 7, and an adjusting cylinder 6 which is connected between the first movable pipeline section 3 and the second movable pipeline section 7 and controls the first movable pipeline section 3 and the second movable pipeline section 7 to move. The driving mechanism can control the first movable pipeline section 3 and the second movable pipeline section 7 to respectively move and adjust towards two sides so as to correspondingly clamp the standard air flow meter 2 and the air flow meter 8 to be measured.
The adjusting cylinder 6 is a bidirectional pushing cylinder provided with two independent chambers and two piston rods, and the extending ends of the two piston rods are respectively connected with the first movable pipeline section 3 and the second movable pipeline section 7. The adjusting cylinder 6 can be controlled to adjust and move according to the size and the specification of the air flow meter for actual clamping, so that the clamping requirement is met, the structure is simple, and the control and the use are convenient and fast.
In the invention, as shown in fig. 2, the edges of one ends of the first movable pipeline section 3 and the second movable pipeline section 7, which are connected with the driving mechanism, are respectively provided with a convex annular flange mounting surface, and the telescopic pipeline sections are detachably connected to the flange mounting surfaces of the first movable pipeline section 3 and the second movable pipeline section 7 through connecting bolts, so that the telescopic pipeline sections 5 can be maintained, cleaned and replaced conveniently.
In the invention, at least two adjusting cylinders 6 distributed at intervals are arranged on the periphery of the outer side of the telescopic pipeline section 5 to ensure stable supporting and adjusting, and if necessary, guide rods can be arranged between the first movable pipeline section 3 and the second movable pipeline section 7 and are arranged between the adjusting cylinders 6 at intervals to ensure accurate connection between pipelines.
In the invention, the edges of the butt joint ends of the pipeline inlet section 1, the pipeline outlet section 9, the first movable pipeline section 3 and the second movable pipeline section 7 and the air flow meter are provided with convex annular flange mounting surfaces, and the flange mounting surfaces are provided with sealing air cushions which can be set to have certain width so as to adapt to the sealing connection of the air flow meters with different calibers.
In the invention, the first movable pipeline section 3 and the second movable pipeline section 7 are respectively provided with the supporting seat 4 for supporting the first movable pipeline section 3 and the second movable pipeline section 7 on the test bench, and the coaxiality and the concentricity of the first movable pipeline section 3 and the second movable pipeline section 7 and the pipeline inlet section 1 and the pipeline outlet section 9 at the two ends can be adjusted and controlled through the supporting seats 4, so that the accuracy of the air flow meter testing device is ensured. And the first movable pipeline section 3 and the second movable pipeline section 7 can move back and forth along the supporting seat 4 to adjust certain guiding control function of the supporting seat.
The air flow meter testing method has the advantages of good stability, high accuracy, convenience and quickness in operation and adjustment, applicability to detection of various air flow meters, strong universality and better application prospect.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the precise construction and instrumentalities shown, but is intended to cover various insubstantial modifications of the invention, including those made without departing from the spirit and scope of the invention, and all such modifications and equivalents as fall within the spirit and scope of the invention.
Claims (1)
1. An air flow meter testing method is characterized in that: the method comprises the following steps:
1) controlling the first movable pipeline section and the second movable pipeline section to move through the adjusting cylinder so as to clamp the standard air flow meter and the air flow meter to be tested at corresponding positions;
the test pipeline comprises a pipeline inlet section and a pipeline outlet section which are arranged at two ends, and a clamping pipeline section which is arranged in the middle and is respectively matched with the pipeline inlet section and the pipeline outlet section to fixedly clamp the standard air flow meter and the air flow meter to be tested, wherein the clamping pipeline section comprises a first movable pipeline section and a second movable pipeline section;
2) starting a fan, enabling wind to enter a test pipeline through an air compressor, respectively detecting wind speed signals of an inlet section and an outlet section of the test pipeline by a first wind speed detector and a second wind speed detector, outputting the signals to a controller, and identifying the wind speed signals by the controller; if the wind speed signals are the same, starting to collect data such as output voltage, working current and the like of the standard air flow meter and the air flow meter to be detected, outputting the data to a display for displaying, and performing comparative analysis to judge whether the product performance is good or not; if the wind speed of the outlet section is low, a vacuum device arranged behind the outlet section of the pipeline can be started by controlling to increase the wind speed of the rear section, after the wind speed in the whole test pipeline is stable, the output voltage and working current data of the standard air flow meter and the air flow meter to be tested are started to be collected and output to a display for displaying, and the product performance is judged by performing comparative analysis; the air compressor and the vacuum device are externally connected with an air source capable of controlling and adjusting pressure; the fan is connected with a frequency converter for controlling the rotating speed of the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507566.7A CN107367312B (en) | 2017-06-28 | 2017-06-28 | Air flow meter testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710507566.7A CN107367312B (en) | 2017-06-28 | 2017-06-28 | Air flow meter testing method |
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| Publication Number | Publication Date |
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| CN107367312A CN107367312A (en) | 2017-11-21 |
| CN107367312B true CN107367312B (en) | 2020-06-23 |
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| CN201710507566.7A Active CN107367312B (en) | 2017-06-28 | 2017-06-28 | Air flow meter testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108007839B (en) * | 2017-11-30 | 2023-10-13 | 深圳市鼎信科技有限公司 | Damping detector control method, computer readable storage medium and damping detector |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU575495A1 (en) * | 1975-07-17 | 1977-10-05 | Ивано-Франковский Институт Нефти И Газа | Device for measuring gas flow rate through annular passage between the walls of a gauged portion of a pipeline and the moving piston of a piston-type flowmeter |
| CN201387355Y (en) * | 2009-03-06 | 2010-01-20 | 温州市安能机械有限公司 | Detection device for automobile air-flow meter |
| EP2598684B1 (en) * | 2010-07-30 | 2020-12-16 | Ecolab USA Inc. | Apparatus for calibrating a liquid dispensing system |
| CN103335677A (en) * | 2013-05-30 | 2013-10-02 | 苏州华达仪器设备有限公司 | Air volume test system |
| CN204085642U (en) * | 2014-04-24 | 2015-01-07 | 安徽盛洲汽车部件有限公司 | A kind of air flow sensor test board |
| CN105890715A (en) * | 2014-12-03 | 2016-08-24 | 常州市晨通电信设备厂(普通合伙) | Verifying device of small-flow gas flow meter |
| CN204346551U (en) * | 2014-12-30 | 2015-05-20 | 郑州光力科技股份有限公司 | A kind of gas flow sensor calibrating installation |
| CN205173794U (en) * | 2015-10-26 | 2016-04-20 | 杭州管康塑业有限公司 | Double -deck drain pipe sound insulation telescopic joint device |
| CN205716146U (en) * | 2016-06-23 | 2016-11-23 | 德州泰威通风设备有限公司 | Ventilation shaft telescopic regulation structure |
| CN205938263U (en) * | 2016-07-27 | 2017-02-08 | 中国葛洲坝集团第二工程有限公司 | There is large pipe system scalable and removal passageway |
| CN206038118U (en) * | 2016-09-27 | 2017-03-22 | 重庆医药高等专科学校 | Medical subtend flow pattern mass flow meter's mass flow calibration device |
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