CN102829933A - Air tightness detector for photoelectric instrument - Google Patents
Air tightness detector for photoelectric instrument Download PDFInfo
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- CN102829933A CN102829933A CN2012103333568A CN201210333356A CN102829933A CN 102829933 A CN102829933 A CN 102829933A CN 2012103333568 A CN2012103333568 A CN 2012103333568A CN 201210333356 A CN201210333356 A CN 201210333356A CN 102829933 A CN102829933 A CN 102829933A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 84
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000008520 organization Effects 0.000 abstract 1
- 230000033228 biological regulation Effects 0.000 description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to an air tightness detector for a photoelectric instrument. The air tightness detector comprises a nitrogen on-line quality analysis module, a first air inflation channel, a second air inflation channel and a single-chip microcomputer control circuit, wherein the nitrogen on-line quality analysis module is formed by connecting a dew-point meter, a nitrogen purity analysis meter and a digital type pressure meter; the first air inflation channel is formed by connecting a first precise pressure reducing valve, a first magnetic valve and a first digital type pressure switch; the second air inflation channel is formed by connecting a second precise pressure reducing valve, a second magnetic valve and a second digital type pressure switch; the single-chip microcomputer control circuit is connected with each component, and the air quality of an input air source and the air inflation time, air inflation pressure and other indexes of the air inflation of the photoelectric instrument are monitored in real time. The air tightness detector for the photoelectric instrument disclosed by the invention is suitable for the air tightness detection of inner cavities of various precise photoelectric instruments, and can be widely used for the air tightness detection of newly developed or repaired photoelectric instruments in a photoelectric instrument development organization or repair factory.
Description
Technical field
The present invention relates to a kind of air-tightness detection device, specifically a kind of photoelectric instrument air-leakage detector.
Background technology
For guaranteeing the normal use of accurate photoelectric instrument, photoelectric instrument dispatches from the factory preceding or repaiies the nitrogen that all will charge into high-purity, low dew point after completing, to prevent that mildewing from appearring in photoelectric instrument inside, the fog phenomenon.The pure nitrogen that charges into the photoelectric instrument inner chamber carries out gas exchange slowly through each parts connection space of photoelectric instrument and ambient atmosphere; Relevant criterion all has strict demand to photoelectric instrument leak source, leakage rate etc.; When gas leakage rate during greater than setting; Think that then there is gas leak phenomenon in this photoelectric instrument; There is the photoelectric instrument of serious gas leak phenomenon owing to introduce corrosive gas and the steam in the atmosphere, will causes that photoelectric instrument innerly occurs serious mildewing, the fog phenomenon, thereby influence the normal use of photoelectric instrument.
So, to carry out airtight test to photoelectric instrument in advance.Existing inspection method is that the end of tested photoelectric instrument bleeder port with a U type mercury linked to each other; Utilize photoelectric instrument inflation interface to wherein charging into dry pure nitrogen then; U type mercury other end mercury liquid level begins to rise; When rising to a certain position; Cut off source of inflation gas; Whether observe the mercury liquid level occurs descending at the appointed time---and the mercury liquid level descends, and then expression has gas leak phenomenon; Otherwise, represent that then the air-tightness of this photoelectric instrument is good.This air-tightness detection method, one side need to rely on eye-observation, and human factor is bigger to the testing result influence; On the other hand, also inapplicable synchronous impermeability to big quantity photoelectric instrument detects.
Summary of the invention
The object of the invention just provides a kind of photoelectric instrument air-leakage detector, detects the bigger problem of testing result error that relies on manual observation to exist to solve impermeability.
The present invention is achieved in that a kind of photoelectric instrument air-leakage detector, includes:
Dew point hygrometer; Join with nitrogen gas purity analyser, gas bleed valve and single chip machine controlling circuit respectively; Be used to detect the dewpoint temperature of input nitrogen, and the source of the gas that dewpoint temperature is not up to standard outputs to the nitrogen gas purity analyser through the gas bleed valve discharge with dewpoint temperature source of the gas up to standard;
The nitrogen gas purity analyser; Join with said dew point hygrometer, gas bleed valve, digital pressure gauge and single chip machine controlling circuit respectively; Be used to detect the purity of input nitrogen, and the source of the gas that purity is not up to standard outputs to digital pressure gauge through the gas bleed valve discharge with purity source of the gas up to standard;
Digital pressure gauge; Join with said nitrogen gas purity analyzer, gas bleeder valve, the first accurate pressure-reducing valve, the second accurate pressure-reducing valve and single chip machine controlling circuit respectively; Be used for detecting the input nitrogen gas pressure; And the source of the gas that pressure is not up to standard discharges by gas bleeder valve, and pressure source of the gas up to standard is outputed to the first accurate pressure-reducing valve and the second accurate pressure-reducing valve respectively;
Gas bleed valve joins with said dew point hygrometer, said nitrogen gas purity analyser, said digital pressure gauge and single chip machine controlling circuit, is used for getting rid of source of the gas not up to standard;
The first accurate reduction valve joins with the said digital pressure gauge and first solenoid valve respectively, is used for pressure with the input source of the gas and reduces pressure and export after first setting value;
First solenoid valve joins with the said first accurate reduction valve, the first digital pressure switch and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, first gas fill port being carried out switch control;
The first digital pressure switch is joined with said first solenoid valve and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, first gas fill port being carried out switch control;
The second accurate reduction valve joins with the said digital pressure gauge and second solenoid valve respectively, is used for pressure with the input source of the gas and reduces pressure and export after second setting value;
Second solenoid valve joins with the said second accurate reduction valve, the second digital pressure switch and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, second gas fill port being carried out switch control;
The second digital pressure switch is joined with said second solenoid valve and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, second gas fill port being carried out switch control;
Single chip machine controlling circuit; Join with said dew point hygrometer, said nitrogen gas purity analyser, said digital pressure gauge, said blowdown valve, said first solenoid valve, the said first digital pressure switch, said second solenoid valve, the said second digital pressure switch, display and hummer respectively; Be used for to the input source of the gas gaseous mass, monitor in real time to the inflationtime and the charge pressure of the inflation of tested instrument, and send display to show the impermeability testing result;
Display joins with said single chip machine controlling circuit, is used to show the impermeability testing result; And
Hummer joins with said single chip machine controlling circuit, is used under detection has the situation of gas leakage, giving alarm.
Photoelectric instrument air-leakage detector of the present invention also includes:
First pressure transducer is arranged on the gas channels of the said first digital pressure switch back, joins with said single chip machine controlling circuit, is used for the charge pressure value that monitoring in real time charges into seized photoelectric instrument; And
Second pressure transducer is arranged on the gas channels of the said second digital pressure switch back, joins with said single chip machine controlling circuit, is used for the charge pressure value that monitoring in real time charges into seized photoelectric instrument.
The nitrogen online quality analysis module of the present invention through being made up of dew point hygrometer, nitrogen gas purity analyser and digital pressure gauge detects the technical requirement whether the nitrogen quality that is input in the tested photoelectric instrument satisfies regulation; Utilize the sheet inner control software of single chip machine controlling circuit, the gaseous mass, inflationtime, the charge pressure that charge into are monitored in real time, when gaseous mass, inflationtime, when charge pressure does not reach setting value, utilize display and buzzer warning; Accurate reduction valve is provided with two; Be depressurized to two kinds of different infrabar with the nitrogen pressure of input is stable respectively, accurate reduction valve adopts the aperture of the opening and closing element in the application valve body to come the adjustments of gas flow, simultaneously by the effect of downstream pressure; Regulate the aperture of opening and closing element; Thereby downstream pressure is kept within the specific limits, under the situation that inlet gas pressure changes, also can keep exit gas pressure in the scope of setting.
The present invention is that the impermeability of photoelectric instrument detects; A kind of automatic measuring device of coincidence detection code requirement is provided; Can eliminate the interference of human factor, guarantee accuracy and reliability that impermeability detects, the impermeability that has solved the photoelectric instrument that the impermeability requirement is arranged thus detects a difficult problem; Prevented that effectively photoelectric instrument from mildewing, the generation of fog phenomenon, and technical indicator that can corresponding raising photoelectric instrument.
The present invention utilizes the online quality analysis module of nitrogen to realize the quality monitoring of input nitrogen, utilizes digital pressure switch and solenoid valve on two gas fill port of single chip machine controlling circuit control, has realized that thus the impermeability of photoelectric instrument detects.The present invention has small intelligent, characteristics such as highly integrated, easy to use, and the impermeability that can carry out two kinds of photoelectric instruments under the different infrabar pressure conditions detects, and under the situation that the photoelectric instrument impermeability lost efficacy, gives alarm.The invention solves impermeability and detect the bigger problem of testing result error that relies on manual observation to exist; Can the synchronous impermeability of big quantity photoelectric instrument be detected; The impermeability that is applicable to various accurate photoelectric instrument inner chambers detects; Can be widely used in photoelectric instrument research institute and maintenance depot to newly grinding or repair in the impermeability testing that photoelectric instrument carried out after completing, to guaranteeing the photoelectric instrument the key technical indexes, prevent to mildew, the generation of fog phenomenon is significant.
Description of drawings
Fig. 1 is a circuit structure block diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention composes in series the online quality analysis module of nitrogen mutually by dew point hygrometer, nitrogen gas purity analyser and digital pressure gauge, detects the technical requirement whether the nitrogen quality that is input in the tested photoelectric instrument satisfies regulation; Dew point hygrometer, nitrogen gas purity analyser and digital pressure gauge join with gas bleed valve respectively, when detecting not source of the gas up to standard, and under the control of single chip machine controlling circuit, the corresponding source of the gas of in time releasing.
What join with the online quality analysis module of nitrogen output terminal is the two-way gas fill port, and each road is respectively arranged with accurate reduction valve, is decompressed to two kinds of different infrabar with the input source of the gas with 200kPa; In each gas fill port, also be connected to the combination switch valve of forming by solenoid valve and digital pressure switch, under the control of single chip machine controlling circuit, realize the automatic unlatching and the shutoff of each gas fill port.
First gas fill port is to be composed in series by the first accurate reduction valve, first solenoid valve and the first digital pressure switch, and its output terminal is that infrabar detects mouth one.Second gas fill port is to be composed in series by the second accurate reduction valve, second solenoid valve and the second digital pressure switch, and its output terminal is that infrabar detects mouth two.
Single chip machine controlling circuit joins with dew point hygrometer, nitrogen gas purity analyser, digital pressure gauge, blowdown valve, first solenoid valve, the first digital pressure switch, second solenoid valve, the second digital pressure switch respectively; Monitoring in real time, and can initial parameter be made amendment according to user's setting to the gaseous mass of input source of the gas with to indexs such as the inflationtime of photoelectric instrument inflation and charge pressures; The sheet inner control software of single chip machine controlling circuit also can receive setting and the modification of user to inflationtime initial setting parameter.On the output terminal of single chip machine controlling circuit, also be connected to display and hummer, in order to showing the impermeability testing result, and have in detection under the situation of gas leakage and give alarm.Display can be LCD display or LCDs.
The present invention also output terminal of first gas fill port after the first digital pressure switch is provided with first pressure transducer, and the output terminal of second gas fill port after the second digital pressure switch is provided with second pressure transducer; First pressure transducer and second pressure transducer join with single chip machine controlling circuit respectively, are used for the charge pressure value that monitoring in real time charges into seized photoelectric instrument, and detect data to the single chip machine controlling circuit transmission.
The present invention also can use light-duty aluminium sash to make a casing; Accurate reduction valve, single chip machine controlling circuit, digital pressure switch, solenoid valve etc. are installed in the casing, and the LCD display of detection port, pressure and constant voltage time is positioned on the front panel of casing.Stabilized voltage supply also is housed, to convert the 220V AC power required direct-current working volts such as into single chip machine controlling circuit in casing.
Principle of work of the present invention is: 200kPa clean, dry nitrogen gets in the photoelectric instrument air-leakage detector of the present invention through detection port; Dew point hygrometer in the online quality analysis module of nitrogen carries out the dewpoint temperature detection to the nitrogen of input; The nitrogen gas purity analyser carries out purity detecting to the nitrogen of input, and digital pressure gauge carries out the gaseous tension detection to the nitrogen of input; If the input gaseous mass does not reach the gaseous mass requirement of regulation, then single chip machine controlling circuit is opened gas bleed valve, and defective gas is discharged detector; If the input gaseous mass reaches the gaseous mass requirement of regulation, then utilize threeway that the nitrogen of input is distributed in the two-way gas fill port.In the two-way gas fill port, the gas of input is decompressed to two kinds of infrabar that pressure is different through the first accurate reduction valve with the second accurate reduction valve respectively; Two direct-acting electromagnetic valves are controlled its switching by single chip machine controlling circuit respectively, place a digital pressure switch behind each solenoid valve.Be tapped at two high precision first pressure transducer and second high-precision pressure sensors on the gas fill port, monitoring in real time charges into the charge pressure value of seized photoelectric instrument.
If inflationtime surpasses the longest inflationtime of regulation, and pressure does not reach setting value yet, representes that then seized photoelectric instrument has the gas leakage situation, single chip machine controlling circuit control LCD display and hummer send sound and light alarm; If inflationtime reaches the force value of setting in the longest inflationtime of regulation; When the gas pressure value of photoelectric instrument inner chamber and this detector pressure inside value stabilization to two kind of different infrabar; Solenoid valve and digital pressure switch on two gas fill port of single chip machine controlling circuit control are closed, and the nitrogen source of the gas of input is discharged this detector through air-outlet valve.
Single chip machine controlling circuit utilizes sheet inner control software that inflationtime, charge pressure are monitored in real time; In official hour; The variation of the gas pressure value of photoelectric instrument inner chamber is not less than the gas pressure value of regulation; Then think the requirement that touches the mark of the impermeability of tested photoelectric instrument inner chamber, single chip machine controlling circuit is shown in the impermeability testing result on the LCD display simultaneously.
Claims (2)
1. a photoelectric instrument air-leakage detector is characterized in that, includes:
Dew point hygrometer; Join with nitrogen gas purity analyser, gas bleed valve and single chip machine controlling circuit respectively; Be used to detect the dewpoint temperature of input nitrogen, and the source of the gas that dewpoint temperature is not up to standard outputs to the nitrogen gas purity analyser through the gas bleed valve discharge with dewpoint temperature source of the gas up to standard;
The nitrogen gas purity analyser; Join with said dew point hygrometer, gas bleed valve, digital pressure gauge and single chip machine controlling circuit respectively; Be used to detect the purity of input nitrogen, and the source of the gas that purity is not up to standard outputs to digital pressure gauge through the gas bleed valve discharge with purity source of the gas up to standard;
Digital pressure gauge; Join with said nitrogen gas purity analyzer, gas bleeder valve, the first accurate pressure-reducing valve, the second accurate pressure-reducing valve and single chip machine controlling circuit respectively; Be used for detecting the input nitrogen gas pressure; And the source of the gas that pressure is not up to standard discharges by gas bleeder valve, and pressure source of the gas up to standard is outputed to the first accurate pressure-reducing valve and the second accurate pressure-reducing valve respectively;
Gas bleed valve joins with said dew point hygrometer, said nitrogen gas purity analyser, said digital pressure gauge and single chip machine controlling circuit, is used for getting rid of source of the gas not up to standard;
The first accurate reduction valve joins with the said digital pressure gauge and first solenoid valve respectively, is used for pressure with the input source of the gas and reduces pressure and export after first setting value;
First solenoid valve joins with the said first accurate reduction valve, the first digital pressure switch and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, first gas fill port being carried out switch control;
The first digital pressure switch is joined with said first solenoid valve and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, first gas fill port being carried out switch control;
The second accurate reduction valve joins with the said digital pressure gauge and second solenoid valve respectively, is used for pressure with the input source of the gas and reduces pressure and export after second setting value;
Second solenoid valve joins with the said second accurate reduction valve, the second digital pressure switch and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, second gas fill port being carried out switch control;
The second digital pressure switch is joined with said second solenoid valve and single chip machine controlling circuit respectively, is used under the control of single chip machine controlling circuit, second gas fill port being carried out switch control;
Single chip machine controlling circuit; Join with said dew point hygrometer, said nitrogen gas purity analyser, said digital pressure gauge, said blowdown valve, said first solenoid valve, the said first digital pressure switch, said second solenoid valve, the said second digital pressure switch, display and hummer respectively; Be used for to the input source of the gas gaseous mass, monitor in real time to the inflationtime and the charge pressure of the inflation of tested instrument, and send display to show the impermeability testing result;
Display joins with said single chip machine controlling circuit, is used to show the impermeability testing result; And
Hummer joins with said single chip machine controlling circuit, is used under detection has the situation of gas leakage, giving alarm.
2. photoelectric instrument air-leakage detector according to claim 1 is characterized in that, also includes:
First pressure transducer is arranged on the gas channels of the said first digital pressure switch back, joins with said single chip machine controlling circuit, is used for the charge pressure value that monitoring in real time charges into seized photoelectric instrument; And
Second pressure transducer is arranged on the gas channels of the said second digital pressure switch back, joins with said single chip machine controlling circuit, is used for the charge pressure value that monitoring in real time charges into seized photoelectric instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210333356.8A CN102829933B (en) | 2012-09-11 | 2012-09-11 | Air tightness detector for photoelectric instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210333356.8A CN102829933B (en) | 2012-09-11 | 2012-09-11 | Air tightness detector for photoelectric instrument |
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| CN102829933A true CN102829933A (en) | 2012-12-19 |
| CN102829933B CN102829933B (en) | 2014-10-08 |
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| CN201210333356.8A Expired - Fee Related CN102829933B (en) | 2012-09-11 | 2012-09-11 | Air tightness detector for photoelectric instrument |
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Cited By (6)
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| CN108151988A (en) * | 2017-12-13 | 2018-06-12 | 中山火炬职业技术学院 | A kind of detection method of high-precision air tightness detection device |
| CN104567852B (en) * | 2015-01-23 | 2018-08-31 | 北京航天时代光电科技有限公司 | A kind of fibre optic gyroscope airtight construction part and its air tightness testing method |
| CN109141782A (en) * | 2018-09-18 | 2019-01-04 | 昆明北方红外技术股份有限公司 | The airtight test of ultralow pressure and gas substitution detector |
| CN109900438A (en) * | 2019-03-04 | 2019-06-18 | 湖北三江航天万峰科技发展有限公司 | A kind of precision optical instrument pumping inflation leak test platform |
| CN115493778A (en) * | 2022-09-15 | 2022-12-20 | 广西电网有限责任公司北海供电局 | Main Transformer Nitrogen Injection Pressurization Monitoring Device |
| CN115638934A (en) * | 2022-09-05 | 2023-01-24 | 北京中海技创科技发展有限公司 | Nitrogen charging adapter control method |
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| CN109900438A (en) * | 2019-03-04 | 2019-06-18 | 湖北三江航天万峰科技发展有限公司 | A kind of precision optical instrument pumping inflation leak test platform |
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| CN102829933B (en) | 2014-10-08 |
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