CN204115989U - Multistation leak detector testing circuit - Google Patents
Multistation leak detector testing circuit Download PDFInfo
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- CN204115989U CN204115989U CN201420597411.9U CN201420597411U CN204115989U CN 204115989 U CN204115989 U CN 204115989U CN 201420597411 U CN201420597411 U CN 201420597411U CN 204115989 U CN204115989 U CN 204115989U
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- leak detector
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Abstract
The utility model discloses a kind of multistation leak detector testing circuit, comprise comparator circuit and warning circuit, described comparator circuit comprises detection power supply, described detection supply coupling has air pressure sampling unit, for sampling, atmospheric pressure value exports sampled voltage, reference voltage unit, for output reference voltage, comparer, for comparing sampled voltage and reference voltage, Output rusults voltage, described warning circuit comprises driving power, described driving power is coupled with alarm element, and described warning circuit is used for according to result voltage, and trigger alarm element is reported to the police.Being converted into voltage signal by comparator circuit sampling atmospheric pressure value, controlling warning circuit trigger alarm, thus without the need to personal monitoring's rain glass through comparing, by simple circuit structure, realize the air-leakage test of pneumatic joint, cost is low, reduces manpower and financial resources loss.
Description
Technical field
The utility model relates to a kind of multistation leak detector, and more particularly, it relates to a kind of multistation leak detector testing circuit.
Background technology
At multiclass pneumatic equipment, in use as products such as jet gun, dust blower, tire pressure guns, pneumatic joint is used for being connected with pneumatic equipment by pipeline in gas circuit, the very important effect born, to the impermeability requirement of pneumatic joint, it is the basis ensureing pneumatic equipment works fine.
After pneumatic joint output, quality inspection personnel needs to carry out air-leakage test, to ensure that each pneumatic joint can reach impermeability requirement to pneumatic joint.In the detection, people adopt leak detector to detect usually, for increasing work efficiency, often with multiple detection station on leak detector, multiple station lays pneumatic joint to be detected, its principle is, to predict that the detection gas of atmospheric pressure value (being greater than atmospheric pressure) is filled with in the cavity of pneumatic joint, keep detecting to the gas atmosphere value in pneumatic joint, if the impermeability of pneumatic joint is not good, detection gas then in pneumatic joint can be escaped gradually, within predetermined detection time, atmospheric pressure value reduces below arrival floor level, the impermeability then showing this pneumatic joint is defective.
But existing multistation leak detector, it detects usually by rain glass, and after being communicated to pneumatic joint inner chamber by gas circuit, directly detect pneumatic joint internal gas pressure, its numerical value reads on rain glass, needs personal monitoring, and Detection results is not good.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of multistation leak detector testing circuit, and detect pneumatic joint internal gas pressure, automaticity is high, and circuit structure is simple, and cost is low.
For achieving the above object, the utility model provides following technical scheme:
A kind of multistation leak detector testing circuit, comprises comparator circuit and warning circuit,
Described comparator circuit comprises detection power supply, and described detection supply coupling has
Air pressure sampling unit, for sampling, atmospheric pressure value exports sampled voltage;
Reference voltage unit, for output reference voltage;
Comparer, for comparing sampled voltage and reference voltage, Output rusults voltage;
Described warning circuit comprises driving power, and described driving power is coupled with alarm element, and described warning circuit is used for according to result voltage, and trigger alarm element is reported to the police.
By adopting technique scheme, detecting power supply is air pressure sampling unit, reference voltage unit and comparer are powered, atmospheric pressure value in air pressure sampling unit sampling pneumatic joint, be translated into sampled voltage, sampled voltage changes with the change of atmospheric pressure value, reference voltage unit output reference voltage, comparer receives sampled voltage and reference voltage, both are compared, sampled voltage is greater than or less than reference voltage in change procedure, affect the result change in voltage of the output terminal of comparer, it is made to be high level or low level, the change of the change actual reflection pneumatic joint internal gas pressure value of this result voltage, and the actual reflection of reference voltage is barometric minimum standard, after warning circuit reception result voltage, high according to result voltage, low level change, trigger alarm element is reported to the police, for feeding back testing result to quality inspection personnel, driving power is used for powering for alarm element, thus without the need to personal monitoring's rain glass, by simple circuit structure, realize the air-leakage test of pneumatic joint, cost is low, reduce manpower and financial resources loss.
As concrete technical scheme of the present utility model, described air pressure sampling unit comprises being series at and detects force sensing resistance between VDD-to-VSS and divider resistance, the intermediate node of described force sensing resistance and divider resistance is coupled to the input end of comparer, to export sampled voltage, described force sensing resistance is for atmospheric pressure value of sampling.
By adopting technique scheme, force sensing resistance is the resistor of a kind of resistance along with change in pressure, adopt force sensing resistance sampling atmospheric pressure value, force sensing resistance and divider resistance are series at and detect between VDD-to-VSS, and when atmospheric pressure value changes, the resistance of force sensing resistance correspondingly changes, according to the principle of dividing potential drop, the magnitude of voltage of the intermediate node of force sensing resistance and divider resistance, the change of reflection atmospheric pressure value, provides sampled voltage to comparer.
As concrete technical scheme of the present utility model, described reference voltage unit is set to the bleeder circuit being connected in series and detecting between VDD-to-VSS, and the intermediate node of described bleeder circuit is coupled to the input end of comparer, with output reference voltage.
By adopting technique scheme, the same principle adopting dividing potential drop, bleeder circuit carries out dividing potential drop, from its intermediate node output reference voltage, using the comparison other as sampled voltage to the voltage that detection power supply provides
Further, described bleeder circuit comprises the rheostat being series at and detecting between VDD-to-VSS, and described rheostatic centre tap forms the intermediate node of bleeder circuit, and is coupled to comparer.
By adopting technique scheme, due to rheostatic setting, the reference voltage that the intermediate node of bleeder circuit is exported is adjustable, due to the actual reflection of reference voltage is barometric minimum standard, reference voltage can be set according to actual needs, namely barometric minimum standard, regulates the acceptance line of air-leakage test.
As concrete technical scheme of the present utility model, described warning circuit comprises the on-off element of connecting with alarm element, and described on-off element is coupled to the output terminal of comparer, and in response to the switching of result Control of Voltage warning circuit.
By adopting technique scheme, the high and low level change of result voltage, the switching of trigger switch element, on-off element, as the main switch of warning circuit, makes the triggering of alarm element thus, also in response to the change of result voltage, trigger alarm.
Further, described on-off element is set to photo-coupler, and the light emitting diode of described photo-coupler is coupled to the output terminal of comparer and detects between power supply, and the photodiode of described photo-coupler is serially connected with in warning circuit.
By adopting technique scheme, when the output terminal of comparer exports high level, and there is not voltage difference between detection power supply, light emitting diode is not luminous, photodiode turns off, and warning circuit is trigger alarm not, otherwise, the output terminal output low level of comparer, and detect between power supply and produce voltage difference, lumination of light emitting diode, photodiode conducting, alarm element connects driving power, trigger alarm.
Further, described alarm element comprises light emitting diode.
By adopting technique scheme, by the light on and off of light emitting diode, to quality inspection personnel feedback testing result.
Further, described alarm element also includes hummer.
By adopting technique scheme, sound by buzzer warning, to quality inspection personnel feedback testing result.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model multistation leak detector testing circuit embodiment.
Description of reference numerals: 1, comparator circuit; 12, air pressure sampling unit; 13, reference voltage unit; 2, warning circuit.
Embodiment
With reference to Fig. 1, the utility model multistation leak detector testing circuit embodiment is described in further details.
A kind of multistation leak detector testing circuit, comprises comparator circuit 1 and warning circuit 2, and described comparator circuit 1 comprises detection power Vcc 1, and described detection power Vcc 1 can adopt Switching Power Supply to provide.
Described detection power Vcc 1 is coupled with air pressure sampling unit 12, described air pressure sampling unit 12 comprises being series at and detects force sensing resistance Rs between power Vcc 1 and ground and divider resistance R2, in the present embodiment, adopt force sensing resistance Rs common on market, it includes foil gauge, foil gauge is arranged in the gas circuit that rapid-acting coupling is inflated, in order to detect the change of air pressure, to convert the change of resistance value to, the intrinsic standoff ratio of Rs and R2 changes thus, the atmospheric pressure value change in rapid-acting coupling can be reacted, the intermediate node of described force sensing resistance Rs and divider resistance R2 is coupled to the input end of comparer LM393, sampled voltage can be exported in real time.
Reference voltage unit 13 adopts bleeder circuit to realize equally, it comprises the rheostat Rp being series at and detecting between power Vcc 1 and ground, the centre tap of described rheostat Rp forms the intermediate node of bleeder circuit and is coupled to the input end of comparer LM393, as selectable setting, divider resistance R1 is connected in series between rheostat Rp and detection power Vcc 1, can change when the centre tap of standardsizing rheostat Rp, the rate of change of the reference voltage of output, to facilitate fine adjustment.
LM393 comparer is adopted in the present embodiment, for comparing sampled voltage and reference voltage, the reverse input end of LM393 connects the intermediate node between force sensing resistance Rs and divider resistance R2, its in-phase end connects the intermediate node between divider resistance R1 and rheostat Rp, its output terminal detects power Vcc 1 by being connected to after pull-up resistor R3, when magnitude of voltage lower than in-phase end of the magnitude of voltage of LM393 end of oppisite phase, its output terminal exports electronegative potential, now, be serially connected with LM393 output terminal and between the LEDs ON of photo-coupler OC, send light signal; When magnitude of voltage higher than in-phase end of the magnitude of voltage of LM393 end of oppisite phase, its output terminal exports noble potential, this noble potential and Vcc1 are very close, be close to equal, the pressure reduction at the light emitting diode two ends of photo-coupler OC is made to be less than conduction voltage drop, whether do not send light signal thus, it is qualified to react side leakage result thus.
Described warning circuit 2 comprises driving power Vcc2, ground connection after the photodiode of described driving power Vcc2 serial connection pull-up resistor R4, hummer B, LED, photo-coupler OC, when the photodiode of photo-coupler OC receives light signal, powered by Vcc2, hummer B sounding, LED are luminous, and warning quality inspection personnel products air tightness is defective.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a multistation leak detector testing circuit, is characterized in that: comprise comparator circuit and warning circuit,
Described comparator circuit comprises detection power supply, and described detection supply coupling has
Air pressure sampling unit, for sampling, atmospheric pressure value exports sampled voltage;
Reference voltage unit, for output reference voltage;
Comparer, for comparing sampled voltage and reference voltage, Output rusults voltage;
Described warning circuit comprises driving power, and described driving power is coupled with alarm element, and described warning circuit is used for according to result voltage, and trigger alarm element is reported to the police.
2. multistation leak detector testing circuit according to claim 1, it is characterized in that: described air pressure sampling unit comprises being series at and detects force sensing resistance between VDD-to-VSS and divider resistance, the intermediate node of described force sensing resistance and divider resistance is coupled to the input end of comparer, to export sampled voltage, described force sensing resistance is for atmospheric pressure value of sampling.
3. multistation leak detector testing circuit according to claim 1, it is characterized in that: described reference voltage unit is set to the bleeder circuit being connected in series and detecting between VDD-to-VSS, the intermediate node of described bleeder circuit is coupled to the input end of comparer, with output reference voltage.
4. multistation leak detector testing circuit according to claim 3, it is characterized in that: described bleeder circuit comprises the rheostat being series at and detecting between VDD-to-VSS, described rheostatic centre tap forms the intermediate node of bleeder circuit, and is coupled to comparer.
5. multistation leak detector testing circuit according to claim 1, it is characterized in that: described warning circuit comprises the on-off element of connecting with alarm element, described on-off element is coupled to the output terminal of comparer, and in response to the switching of result Control of Voltage warning circuit.
6. multistation leak detector testing circuit according to claim 5, it is characterized in that: described on-off element is set to photo-coupler, the light emitting diode of described photo-coupler is coupled to the output terminal of comparer and detects between power supply, and the photodiode of described photo-coupler is serially connected with in warning circuit.
7. multistation leak detector testing circuit according to claim 1, is characterized in that: described alarm element comprises light emitting diode.
8. multistation leak detector testing circuit according to claim 1, is characterized in that: described alarm element also includes hummer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597411.9U CN204115989U (en) | 2014-10-16 | 2014-10-16 | Multistation leak detector testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420597411.9U CN204115989U (en) | 2014-10-16 | 2014-10-16 | Multistation leak detector testing circuit |
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| Publication Number | Publication Date |
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| CN204115989U true CN204115989U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420597411.9U Expired - Fee Related CN204115989U (en) | 2014-10-16 | 2014-10-16 | Multistation leak detector testing circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181279A (en) * | 2015-09-29 | 2015-12-23 | 青岛歌尔声学科技有限公司 | Air tightness detection device |
| CN107884146A (en) * | 2016-09-30 | 2018-04-06 | 江苏核电有限公司 | A kind of equipment medium leak detecting device |
| CN110693712A (en) * | 2019-10-13 | 2020-01-17 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Medical intelligent medicine box system |
-
2014
- 2014-10-16 CN CN201420597411.9U patent/CN204115989U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181279A (en) * | 2015-09-29 | 2015-12-23 | 青岛歌尔声学科技有限公司 | Air tightness detection device |
| CN105181279B (en) * | 2015-09-29 | 2018-06-26 | 青岛歌尔声学科技有限公司 | A kind of air-tightness detection device |
| CN107884146A (en) * | 2016-09-30 | 2018-04-06 | 江苏核电有限公司 | A kind of equipment medium leak detecting device |
| CN107884146B (en) * | 2016-09-30 | 2024-05-14 | 江苏核电有限公司 | Equipment medium leakage detection device |
| CN110693712A (en) * | 2019-10-13 | 2020-01-17 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | Medical intelligent medicine box system |
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| 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: 20150121 Termination date: 20161016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |