CN107202625B - Air flow meter test system - Google Patents
Air flow meter test system Download PDFInfo
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- CN107202625B CN107202625B CN201710509207.5A CN201710509207A CN107202625B CN 107202625 B CN107202625 B CN 107202625B CN 201710509207 A CN201710509207 A CN 201710509207A CN 107202625 B CN107202625 B CN 107202625B
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- pipeline
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- air flow
- flow meter
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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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses an air flow meter testing system which comprises a fan, a testing pipeline and a control box, wherein a standard air flow meter and an air flow meter to be tested are movably clamped in the testing pipeline, the testing pipeline comprises a pipeline inlet section and a pipeline outlet section, an air compressor is arranged between the fan and the pipeline inlet section, a vacuum device is arranged behind the pipeline outlet section, a first air speed detector and a second air speed detector are respectively arranged on the pipeline inlet section and the pipeline outlet section, the control box collects signals of the standard air flow meter and the air flow meter to be tested and outputs the signals to a display, and the first air speed detector and the second air speed detector are connected with and output air speed signals to the control box. The air flow meter testing system has the advantages of simple structure, 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 an air flow meter testing system.
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, a testing device 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 system which is simple in structure, high in testing effectiveness, good in universality and convenient to use.
In order to achieve the purpose, the invention adopts the technical scheme that: this kind of air flow meter test system that provides, including fan, test tube and control box, standard air flow meter and the air flow meter activity centre gripping that awaits measuring are in the test tube, the test tube includes pipeline import section and pipeline export section, the fan with be equipped with the air compressor between the pipeline import section, be equipped with the vacuum ware behind the pipeline export section, the pipeline import section reaches be equipped with first wind speed detector and second wind speed detector on the pipeline export section respectively, the control box is gathered standard air flow meter and the air flow meter signal that awaits measuring and output to the display, first wind speed detector and second wind speed detector connect output wind speed signal extremely the control box.
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.
The test tube still including locate the middle part respectively with pipeline import section and pipeline export section cooperation are with fixed centre gripping standard air flow meter and the centre gripping pipeline section of the air flow meter that awaits measuring, centre gripping pipeline section includes first movable pipeline section and second movable pipeline section, be equipped with between first movable pipeline section and the second movable pipeline section and drive the two and move towards respectively the actuating mechanism that pipeline import section and pipeline export section removed.
The driving mechanism comprises a telescopic pipeline section and an adjusting cylinder, wherein the telescopic pipeline section is butted between the first movable pipeline section and the second movable pipeline section, and the adjusting cylinder is connected between the first movable pipeline section and the second movable pipeline section and controls the first movable pipeline section and the second movable pipeline section to move.
The adjusting cylinder 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 and the second movable pipeline section.
The first movable pipeline section and the second movable pipeline section are connected with one end edge of the driving mechanism and are provided with protruding annular flange mounting surfaces, and the telescopic pipeline section is detachably connected to the flange mounting surfaces of the first movable pipeline section and the second movable pipeline section through connecting bolts.
At least two adjusting cylinders distributed at intervals are arranged on the periphery of the outer side of the telescopic pipeline section
Compared with the prior art, the invention has the following advantages: the air flow meter testing system has the advantages of simple structure, 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.
The air flow meter testing system comprises a fan 10, a testing 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 testing pipeline as shown in figure 1. 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.
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 air flow meter testing system has the advantages of simple structure, 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 (4)
1. Air flowmeter test system, its characterized in that: the system comprises a fan, a test pipeline and a control box, wherein a standard air flow meter and an air flow meter to be tested are movably clamped in the test pipeline, the test pipeline comprises a pipeline inlet section and a pipeline outlet section, an air compressor is arranged between the fan and the pipeline inlet section, a vacuum device is arranged behind the pipeline outlet section, a first wind speed detector and a second wind speed detector are respectively arranged on the pipeline inlet section and the pipeline outlet section, the control box collects signals of the standard air flow meter and the air flow meter to be tested and outputs the signals to a display, and the first wind speed detector and the second wind speed detector are connected with and output wind speed signals to the control box; 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; the test pipeline also comprises 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, the clamping pipeline section comprises a first movable pipeline section and a second movable pipeline section, and a driving mechanism which can drive the first movable pipeline section and the second movable pipeline section to move towards the pipeline inlet section and the pipeline outlet section respectively is arranged between the first movable pipeline section and the second movable pipeline section; the driving mechanism comprises a telescopic pipeline section and an adjusting cylinder, wherein the telescopic pipeline section is butted between the first movable pipeline section and the second movable pipeline section, and the adjusting cylinder is connected between the first movable pipeline section and the second movable pipeline section and controls the first movable pipeline section and the second movable pipeline section to move.
2. The air flow meter testing system of claim 1, wherein: the adjusting cylinder 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 and the second movable pipeline section.
3. The air flow meter testing system of claim 2, wherein: the first movable pipeline section and the second movable pipeline section are connected with one end edge of the driving mechanism and are provided with protruding annular flange mounting surfaces, and the telescopic pipeline section is detachably connected to the flange mounting surfaces of the first movable pipeline section and the second movable pipeline section through connecting bolts.
4. The air flow meter testing system of claim 3, wherein: the periphery of the outer side of the telescopic pipeline section is provided with at least two adjusting cylinders which are distributed at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509207.5A CN107202625B (en) | 2017-06-28 | 2017-06-28 | Air flow meter test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710509207.5A CN107202625B (en) | 2017-06-28 | 2017-06-28 | Air flow meter test system |
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| Publication Number | Publication Date |
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| CN107202625A CN107202625A (en) | 2017-09-26 |
| CN107202625B true CN107202625B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710509207.5A Active CN107202625B (en) | 2017-06-28 | 2017-06-28 | Air flow meter test system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107560694A (en) * | 2017-08-31 | 2018-01-09 | 上海大众祥源动力供应有限公司 | A kind of platform for flow verification and the flow verification method using the platform |
| CN114076628B (en) * | 2020-08-14 | 2024-09-27 | 中国石油天然气股份有限公司 | Flowmeter performance detection device and method |
| CN114199808B (en) * | 2020-09-17 | 2023-12-26 | 北京乐氏联创科技有限公司 | VOCs sampling method with high dilution ratio |
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| EP2598684B1 (en) * | 2010-07-30 | 2020-12-16 | Ecolab USA Inc. | Apparatus for calibrating a liquid dispensing system |
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| 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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| 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 |
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| 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 |
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| CN107202625A (en) | 2017-09-26 |
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