CN109186721A - A kind of water level sensor leak detection method - Google Patents
A kind of water level sensor leak detection method Download PDFInfo
- Publication number
- CN109186721A CN109186721A CN201811046909.5A CN201811046909A CN109186721A CN 109186721 A CN109186721 A CN 109186721A CN 201811046909 A CN201811046909 A CN 201811046909A CN 109186721 A CN109186721 A CN 109186721A
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- China
- Prior art keywords
- water level
- level sensor
- air
- value
- leakage value
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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
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of water level sensor leak detection methods, which comprises the steps of: 1) water level sensor is mounted on test table；2) air-tightness through low voltage experiment channel, under sensed water level sensor low-pressure state；3) water level sensor exports unqualified test result through low voltage experiment is unqualified, through Hi-pot test channel, the air-tightness of sensed water level sensor in a high voltage state if qualified.This water level sensor leak detection method of the present invention, high degree of automation, quick and precision easy to detect is high, and applicability is good, with good application prospect.
Description
Technical field
The invention belongs to sensor technical fields, more specifically to a kind of water level sensor leak detection method.
Background technique
Water level sensor is built-in with deformable diaphragm of rubber and plastic inlet lid that can be sensitive to fluid pressure, rubber
Diaphragm and intake cover are composed to form fine and close collection chamber.Water level sensor air-tightness is important one of performance indicator, rubber
After the assembly of glue diaphragm, intake cover and pedestal three, need to test to it test and judgement, and existing detection method is behaved
Work detection, artificial judgment, artificial application air pressure easily cause Manufacturing Worker to judge by accident in the process.
Summary of the invention
Present invention aim to address problems of the existing technology, provide a kind of high degree of automation, and accuracy is high
Water level sensor leak detection method.
To achieve the goals above, the technical scheme adopted by the invention is as follows: a kind of water level sensor leak detection method,
It is characterized in that, includes the following steps: that 1) water level sensor is mounted on test table；2) through low voltage experiment channel, detection
Air-tightness under water level sensor low-pressure state；3) water level sensor exports unqualified test knot through low voltage experiment is unqualified
Fruit, through Hi-pot test channel, the air-tightness of sensed water level sensor in a high voltage state if qualified.
To keep above-mentioned technical proposal more detailed and specific, the present invention also provides optimization technique sides further below
Case, to obtain satisfied practical function:
Water level sensor connects air compressor machine in step 1), and air compressor machine passes through driving and air valve control system control starting.
Step 2) mesolow TCH test channel is equipped with the electrical valve of servo of accurate control low pressure value and controls on the channel
The switch electromagnetic valve of gas source switch.
In step 2), setting low pressure detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition
Leakage value is measured, and compares judgement with setting value；It is determined as water if practical leakage value is more than the maximum leakage value of setting
Level sensor air-tightness is unqualified, exports unqualified result；Continue step if practical leakage value is lower than maximum leakage value
3) under mesohigh state air-tightness detection.
In step 3), the switch electromagnetic valve for controlling gas source switch on the channel is equipped in Hi-pot test channel.
In step 3), setting high pressure detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition
Leakage value is measured, and compares judgement with setting value.It is determined as water if practical leakage value is more than the maximum leakage value of setting
The unqualified unqualified structure of output of level sensor air-tightness；As practical leakage value determines the water level sensor lower than maximum leakage value
Air-tightness is qualified, exports pass result.
This water level sensor leak detection method of the present invention compared with prior art, have the advantage that the present invention this
Kind water level sensor leak detection method, high degree of automation, quick and precision easy to detect is high, and applicability is good, has preferable
Application prospect.
Detailed description of the invention
The label in content and figure expressed by the attached drawing to this specification is briefly described below:
Fig. 1 is that water level sensor gas leakage of the present invention detects operating procedure schematic diagram；
Fig. 2 is that water level sensor gas leakage of the present invention detects logical construction schematic diagram；
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation.
Water level sensor leak detection method of the present invention, includes the following steps,
1) water level sensor is mounted on test table；2) through low voltage experiment channel, sensed water level sensor low pressure
Air-tightness under state；3) water level sensor exports unqualified test result through low voltage experiment is unqualified, through height if qualified
Press TCH test channel, the air-tightness of sensed water level sensor in a high voltage state.
Water level sensor connects air compressor machine in step 1), and air compressor machine guarantees that the cleaning of gas source is high as gas source generator
Effect.Air compressor machine passes through driving and air valve control system control starting.
Step 2) mesolow TCH test channel is equipped with the electrical valve of servo of accurate control low pressure value and controls on the channel
The switch electromagnetic valve of gas source switch.It is big accurately to control the atmospheric pressure value inputted in water level sensor to be detected through low voltage experiment channel
It is small.
In step 2), setting low pressure detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition
Leakage value is measured, and compares judgement with setting value.Gas source is directed into precision by the atmospheric pressure value of setting through low voltage experiment channel
Sensor and water level sensor to be detected reach and carry out signal acquisition through sophisticated sensor after circulation time, pressure signal is filled
It is changed to electric signal output, practical leakage value is measured, practical leakage value and the maximum leakage value of setting is compared into judgement.Strictly according to the facts
Border leakage value is more than that the maximum leakage value of setting is then determined as that water level sensor air-tightness is unqualified；If practical leakage value is lower than most
Gross leak value then continues the detection of air-tightness under step 3) mesohigh state.
In step 3), the switch electromagnetic valve for controlling gas source switch on the channel is equipped in Hi-pot test channel.Air Valve Control
System controls the air pressure of air compressor machine output setting value to water level sensor to be detected.
In step 3), setting high pressure detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition
Leakage value is measured, and compares judgement with setting value.Reach and carry out signal acquisition through sophisticated sensor after circulation time, will press
Force signal dress is changed to electric signal output, measures practical leakage value, determines if practical leakage value is more than the maximum leakage value of setting
It is unqualified for water level sensor air-tightness；As practical leakage value determines that the water level sensor air-tightness is closed lower than maximum leakage value
Lattice.
Following table is that height pressure condition divides into fixed pressure detection value, loops to determine the time and the maximum leakage value of permission:
| Project | Inflationtime | Equilibration time | Time of measuring | Pressure limit | Allow leakage value |
| Low pressure | 3S | 3S | 5S | 3.5±0.5kpa | 0.25kpa |
| High pressure | 3S | 3S | 5S | 30±1kpa | 0.35kpa |
Each performance parameter of sophisticated sensor is as follows:
Intelligence instrument Measurement Resolution: 1/1000000；Measuring speed: 25 times/second；Refreshing frequency: 30 times/second；Measurement misses
Difference: < ± 0.5%FS；Measurement accuracy: 0.1~0.5%FS.
This water level sensor leak detection method is invented, high degree of automation, quick and precision easy to detect is high, is applicable in
Property is good, with good application prospect.
The present invention is exemplarily described above in conjunction with attached drawing, but the present invention is not limited to aforesaid way, only
The improvement for the various unsubstantialities to be carried out using the inventive concept and technical scheme of the present invention directly applies to other occasions
, it falls within the scope of protection of the present invention.
Claims (6)
1. a kind of water level sensor leak detection method, which comprises the steps of: 1) be mounted on water level sensor
On test table；2) air-tightness through low voltage experiment channel, under sensed water level sensor low-pressure state；3) water level sensor passes through
Low voltage experiment is unqualified to export unqualified test result, and through Hi-pot test channel if qualified, sensed water level sensor is in height
Air-tightness under pressure condition.
2. water level sensor leak detection method described in accordance with the claim 1, it is characterised in that: water level sensor in step 1)
Air compressor machine is connected, air compressor machine passes through driving and air valve control system control starting.
3. water level sensor leak detection method according to claim 2, it is characterised in that: the test of step 2) mesolow is logical
Road is equipped with the electrical valve of servo of accurate control low pressure value and controls the switch electromagnetic valve of gas source switch on the channel.
4. water level sensor leak detection method described in accordance with the claim 3, it is characterised in that: in step 2), set low pressure
Detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition measurement leakage value, and carried out with setting value
Comparison judgement；It is determined as that water level sensor air-tightness is unqualified if practical leakage value is more than the maximum leakage value of setting, exports
Unqualified result；Continue the inspection of air-tightness under step 3) mesohigh state if practical leakage value is lower than maximum leakage value
It surveys.
5. water level sensor leak detection method according to claim 4, it is characterised in that: in step 3), Hi-pot test
The switch electromagnetic valve for controlling gas source switch on the channel is equipped in channel.
6. water level sensor leak detection method according to claim 5, it is characterised in that: in step 3), set high pressure
Detected value, the maximum leakage value for looping to determine time and permission, sophisticated sensor acquisition measurement leakage value, and carried out with setting value
Comparison judgement.It is determined as the unqualified output of water level sensor air-tightness if practical leakage value is more than the maximum leakage value of setting not
Qualified structure；If practical leakage value determines that the water level sensor air-tightness is qualified lower than maximum leakage value, pass result is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046909.5A CN109186721A (en) | 2018-09-08 | 2018-09-08 | A kind of water level sensor leak detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046909.5A CN109186721A (en) | 2018-09-08 | 2018-09-08 | A kind of water level sensor leak detection method |
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| Publication Number | Publication Date |
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| CN109186721A true CN109186721A (en) | 2019-01-11 |
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| CN201811046909.5A Pending CN109186721A (en) | 2018-09-08 | 2018-09-08 | A kind of water level sensor leak detection method |
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| CN107966252A (en) * | 2017-11-16 | 2018-04-27 | 哈尔滨工业大学 | A kind of leakage amount detector of micrometeor air seal |
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2018
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Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488883U (en) * | 2009-08-18 | 2010-05-26 | 上海师范大学 | Sealing performance detecting device of automobile power steering gear |
| CN102062672A (en) * | 2009-11-17 | 2011-05-18 | 吴佳玲 | Leakage detection method using compressed air as medium |
| CN101813547A (en) * | 2010-05-07 | 2010-08-25 | 品富电子科技(上海)有限公司 | Non-destructive sealing test and verification system and method thereof |
| CN202033160U (en) * | 2011-04-02 | 2011-11-09 | 胡喜凤 | Air-tightness tester |
| CN103115739A (en) * | 2013-01-25 | 2013-05-22 | 北京爱社时代科技发展有限公司 | High-precision cylinder airtightness detection unit |
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| CN204142417U (en) * | 2014-08-13 | 2015-02-04 | 江汉大学 | A kind of car force sensor endurance testing device |
| CN104406750A (en) * | 2014-12-16 | 2015-03-11 | 深圳市汉斯顿净水设备有限公司 | Detection device and detection method for sealing performance of water purifier |
| CN204818699U (en) * | 2015-07-29 | 2015-12-02 | 温岭市金悦自动化设备有限公司 | Gas valve production line |
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Application publication date: 20190111 |
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