CN116296122B - Helium mass spectrum type leak detection method - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 151
- 239000001307 helium Substances 0.000 title claims abstract description 104
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 104
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000001819 mass spectrum Methods 0.000 title claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 93
- 239000007789 gas Substances 0.000 claims abstract description 70
- 239000000047 product Substances 0.000 claims abstract description 64
- 239000011265 semifinished product Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 29
- 238000004364 calculation method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 108090000565 Capsid Proteins Proteins 0.000 claims description 3
- 238000005034 decoration Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004949 mass spectrometry Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
-
- 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
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a helium mass spectrum type leak detection method, which comprises the following steps: step one: splitting to-be-tested semi-finished parts of the intelligent wearable watch, the Bluetooth headset and the intelligent AR glasses respectively, and step two: after the helium gas in the gas circuit pipe network of the factory is pressurized by the air compressor, the third step is that: and then, the semi-finished product components of the intelligent wearing watches, the Bluetooth headset and the intelligent AR glasses are sequentially arranged in the pneumatic tool fixture to be positioned, the high-pressure helium gas pressure parameters after entering are adjusted through the process coordination, so that the high-pressure helium gas meets the detection specified values, the fine detection mode of the semi-finished product components and finished products is adopted, the effect of sealing leakage treatment on the intelligent watches, the Bluetooth headset and the intelligent AR glasses based on a high-pressure helium filling mixing method is achieved, after the intelligent watches, the Bluetooth headset and the intelligent AR glasses are detected to have problems, the component components are not required to be detached one by one, time and labor are saved, and the detection efficiency and accuracy are improved.
Description
Technical Field
The invention relates to the technical field of intelligent product mass spectrum type leak tightness, in particular to a helium mass spectrum type leak tightness detection method.
Background
The intelligent watch is characterized in that an intelligent system is built in the watch, a smart mobile phone system is mounted and connected to a network to realize multiple functions, telephones, short messages, mails, photos, music and the like in the mobile phone can be synchronized, along with the development of the existing technology, heart rate detectors are arranged in the intelligent watch and used for monitoring heart rate values of users, the Bluetooth headset is used on the hands-free headset, so that users can avoid the trouble of annoying wires, can easily talk in various modes, is always a good tool for improving efficiency of mobile business groups since the Bluetooth headset is made, AR glasses are a product with science fiction colors, are also a product with the prior art, can experience picture functions in science fiction movies, can realize multiple functions, can be regarded as a miniature mobile phone, can judge the state of the users by tracking eye gaze tracks, can start corresponding functions,
with the increasing development of internet technology, many intelligent products including intelligent watches, bluetooth earphones and intelligent AR glasses are derived in the market, and as the intelligent watches, bluetooth earphones and intelligent AR glasses are all precise products, after production and assembly, the intelligent watches, bluetooth earphones and intelligent AR glasses need to be subjected to sealing leakage treatment, and various methods for detecting the sealing leakage are used at present, and common detection methods include a differential pressure method, an immersion method, a smearing method, a helium gas tracing method (concentration method), a helium gas tracing method (mass spectrometry) and an ultrasonic method, and the detection method adopted by the method is the helium gas tracing method (mass spectrometry), and the detection method adopts a helium mass spectrometer leak detector for detection, and is a conventional analytical instrument device which is widely applied in the home and abroad, such as the electric industry, the vacuum industry, the nuclear industry, the refrigeration industry and the like. Helium mass spectrum leak detection method is to use helium as a special leak detection instrument for indicating helium gas leakage, is the most commonly used leak detection instrument used in vacuum leak detection technology, the application technology is also continuously developed and perfected, the instrument structure is continuously changed along with the popularization of application, when the helium mass spectrum leak detector is used for detection, the finished products of the intelligent watch, the Bluetooth headset and the intelligent AR glasses are subjected to leak tightness, a semi-finished product part and a finished product fine detection mode cannot be adopted, the intelligent watch, the Bluetooth headset and the intelligent AR glasses are subjected to leak tightness treatment based on a high-pressure helium filling mixing method, after the problem occurs in finished product detection, the finished products still need to be split and then removed one by one, so that the time and the labor are wasted, the efficiency is lower, meanwhile, the leak detection phenomenon is easy to occur, the accuracy of detection results is reduced, and therefore, the helium mass spectrum leak detection method is provided.
Disclosure of Invention
The invention aims to provide a helium mass spectrum type leak detection method, which aims to solve the problem that a semi-finished product part and a finished product cannot be carefully detected in the background technology, and the leak treatment is carried out on a smart watch, a Bluetooth headset and a smart AR (AR) glasses based on a high-pressure helium filling mixing method.
In order to achieve the above purpose, the present invention provides the following technical solutions: a helium mass spectrum type leak detection method comprises the following steps:
step one: splitting the to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses respectively, correspondingly putting the to-be-tested semi-finished product components into semi-finished product detection boxes, pasting labels outside the semi-finished product detection boxes corresponding to the to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection, simultaneously preparing a group of qualified finished products of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, correspondingly putting the qualified finished products into three groups of detection boxes, and correspondingly pasting the labels outside the three groups of detection boxes according to the correspondence of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection;
step two: after being pressurized by an air compressor, helium gas in a gas circuit pipe network of a factory is fed into a gas storage tank, then two groups of two-way valves are respectively opened, the high-pressure helium gas sequentially passes through a first group of filters, a freeze dryer and a second group of filters to reach the adsorption dryer, then a three-way valve is opened, and the high-pressure helium gas correspondingly enters a leakage point detector and a pneumatic tool fixture through a third group of filters, so that detection work of a plurality of groups of intelligent wearing watches, bluetooth headphones, intelligent AR glasses semi-finished product components and finished products can be completed;
step three: then sequentially placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components in a pneumatic tool fixture for positioning, regulating high-pressure helium gas in a gas storage tank in a gas circuit pipeline network of a factory through a pressure regulating valve, sequentially starting an electromagnetic valve Y6 and an electromagnetic valve Y4, detecting the pressure of the entered helium gas in real time through a high-pressure sensor, simultaneously starting two groups of electromagnetic valves Y3, detecting the pressure difference of the entered high-pressure helium gas through a differential pressure sensor in real time, finally plugging at a standard port of a leak point detection machine by a standard plugging block to form a closed space, and then feeding the high-pressure helium gas after reaching the test pressure into the leak point detection machine through the test port, wherein the leak point detection machine performs a leak detection operation on the plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components by the leak detection machine, if the lower limit of the air inlet lower limit is less than the test pressure and the leak lower limit is met simultaneously, outputting OK signals on the basis of the intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components by the differential pressure sensor, and the intelligent AR glasses semi-finished product components by the leak detection machine is not met completely, and if the leak detection results of the leak detection is not met completely and the leak detection results are not met, and the leak detection results are not met completely, and the leak detection of the leak detection operation is finished completely is finished by the intelligent wearing watches, and the three groups of the intelligent wearing watches is not met completely, and the leak detection machine is completely. Checking leakage-proof conditions of a plurality of groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step four: then, respectively placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components after leak detection into an air tightness detector and a water tank to carry out air tightness detection and water soaking experiments, correcting equipment programs of the air tightness detector according to required parameters of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, checking leakage and air tightness of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step five: then sequentially placing three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products in a pneumatic fixture for positioning, and outputting OK signals by a leak point detector if the conditions of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper large leak limit and the lower leak limit < leak value < upper leak limit are met at the same time, wherein the leak point detector outputs OK signals, the sealing leak detection work is completed by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products, the sealing leak detection result is accurate and effective, the leak point detector outputs NG signals if any condition of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper leak limit and the leak value < upper leak limit is not met, the sealing leak detection result is invalid by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR finished products, the sealing leak detection work is repeated three times, and the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR finished products are completely completed by waiting for re-detection, and the actual leak detection result is recorded by three groups of intelligent wearing watches and the intelligent glasses finished products;
step six: and then respectively placing three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products after leak detection into an air tightness detector and a water tank for air tightness detection and water soaking experiments, correcting equipment programs of the air tightness detector according to required parameters of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, checking the air tightness of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, and recording actual conditions and data results.
Preferably, in the first step, the to-be-detected semi-finished part of the smart wearable watch is: the card holds in palm after the injection molding sealing washer region and middle frame button equipment region, and the finished product detection position of wrist-watch is dressed to intelligence is: the area of the joint of the screen and the middle frame, the charging PIN area and the heart rate detector area on the bottom shell.
Preferably, in the first step, the to-be-detected semi-finished product component of the bluetooth headset is: the finished product detection position of bluetooth headset is in the combination region of decoration and procapsid, the PIN region that charges of backshell, loudspeaker point gum region and pilot lamp region: and assembling the front and rear shells into a dispensing area.
Preferably, in the first step, the to-be-detected semi-finished product component of the intelligent AR glasses is: front and back shell area, miniature projector lens area and winding displacement area on the miniature projector assembly and terminal wire assembly area, anterior segment winding displacement connection area and button equipment area on the main part backshell, intelligent AR glasses's finished product detects the position and does: and a combination area of the main body rear case, the micro projector assembly and the main body front case.
Preferably, in the second step, the leak detector and the pneumatic tool fixture are connected by a 25 PNI/O connecting line and a phi 4 test tube, and the 25 PNI/O connecting line is mainly used for data instruction transmission work of the leak detector and the pneumatic tool fixture, and the phi 4 test tube is mainly used for high-pressure helium gas transmission intercommunication work of the leak detector and the pneumatic tool fixture.
Preferably, in the third to sixth steps, when leak detection is performed on the semi-finished product components of the plurality of groups of intelligent wearing watches, the bluetooth headset and the intelligent AR glasses and the three groups of intelligent wearing watches, the bluetooth headset and the intelligent AR glasses, helium is supplied to the leak detector, and the helium is mixed with high-pressure helium gas of the leak detector to form high-pressure mixed helium gas, and a flow calculation formula of the high-pressure mixed helium gas is as follows: q (Q) Total (S) ＝(P1-P2)*V P ，Q Total (S) Is the total flow at the inlet of the leakage point detector, P1 is V P Is the pumping speed at the inlet of the leak detector.
Preferably, in the process from step three to step six, the leak detectorThe helium flow calculation formula is: q (Q) Helium ＝Q Total (S) *ρ＝(P1-P2)*V P * ρ, and Q Helium And (4) the total flow rate of helium at the inlet of the leak detector, wherein ρ is the density of helium in the high-pressure mixed helium gas.
Preferably, in the third to sixth steps, the calculation formula of the flow relation between the high-pressure mixed helium gas pressure and helium gas in the leak detector is as follows: l=k×q Helium ＝K*(P1-P2)*V P * ρ, where L is the high pressure mixed helium gas output pressure of the leak detector, K is the leak detector linear performance parameter, and k=1, 2, 3, … …, N.
Preferably, in the fifth and sixth steps, V in the leak detector is a large leak standard value, and a calculation formula of V is: v=Δpv1-v2= (P1-P2) ×v1-V2, where P1 is the highest pressure value for the pre-charge to reach the inflation stage, P2 is the lowest pressure value for the pre-charge to reach the inflation stage, Δp is the pressure difference between P1 and P2, V1 is the highest leakage upper limit value for the test pressure, and V2 is the lowest leakage lower limit value for the test pressure.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through the process coordination of the first step to the sixth step, the pressure parameters of the high-pressure helium gas after entering are regulated, so that the high-pressure helium gas meets the detection specified value, the effect of leak treatment on the intelligent watch, the Bluetooth headset and the intelligent AR glasses based on a high-pressure helium filling mixing method is realized by adopting a fine detection mode of semi-finished parts and finished products, after the finished products of the intelligent watch, the Bluetooth headset and the intelligent AR glasses are detected, the component parts are not required to be detached one by one and then removed one by one, the time and the labor are saved, the detection efficiency is improved, meanwhile, the detection error phenomenon of the intelligent watch, the Bluetooth headset and the intelligent AR glasses is prevented, and the detection result accuracy of the intelligent watch, the Bluetooth headset and the intelligent AR glasses is improved.
Drawings
FIG. 1 is a diagram of a detection system of the present invention;
FIG. 2 is a schematic diagram of the semi-finished waterproof test of the present invention;
FIG. 3 is a diagram of a semi-finished product detection gas path change line of the present invention;
FIG. 4 is a direct-pressure indirect flow chart of the present invention;
FIG. 5 is a flow chart of the semi-finished product inspection of the present invention;
FIG. 6 is a schematic diagram of the finished waterproof test of the present invention;
FIG. 7 is a line diagram of a finished product detection gas path change line of the present invention;
FIG. 8 is a flow chart of the end product inspection of the present invention;
fig. 9 is a waterproof grade table of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-9, the present invention provides a technical solution: a helium mass spectrum type leak detection method comprises the following steps:
step one: the method comprises the steps of firstly splitting to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses respectively, correspondingly putting the to-be-tested semi-finished product components into semi-finished product detection boxes, pasting labels outside the semi-finished product detection boxes corresponding to the to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection, simultaneously preparing a group of qualified finished products of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, correspondingly putting the qualified finished products into three groups of detection boxes, correspondingly pasting labels outside the three groups of detection boxes according to the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection, and intelligently wearing the to-be-detected semi-finished product components of the watch to-be-detected: the card holds in palm after the injection molding sealing washer region and middle frame button equipment region, and the finished product detection position of wrist-watch is dressed to intelligence is: the area of the junction of the screen and the middle frame, the charging PIN area and the heart rate detector area on the bottom shell, and the semi-finished product part to be detected of the Bluetooth headset is as follows: the finished product detection position of bluetooth headset is in the combination region of decoration and procapsid, the PIN region that charges of backshell, loudspeaker point gum region and pilot lamp region: the front and rear shell assembly dispensing area, the to-be-detected semi-finished product part of the intelligent AR glasses is as follows: front and back shell area, miniature projector lens area and winding displacement area on the miniature projector assembly and terminal wire assembly area, anterior segment winding displacement connection area and button equipment area on the main part backshell, intelligent AR glasses's finished product detects the position and does: the combination area of the main body rear shell, the micro projector assembly and the main body front shell subdivides the detection semi-finished product and the finished product position of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, improves the comprehensiveness of the leak detection, prevents the leak, and facilitates the detection personnel to know the problem at the first time when the leak of the leak occurs in the detection semi-finished product and the finished product position of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, thereby facilitating tracking and tracing, and saving time and labor;
step two: after being pressurized by an air compressor, helium gas in a gas path pipe network of a factory is fed into a gas storage tank, two groups of two-way valves are opened respectively, the high-pressure helium gas sequentially passes through a first group of filters, a freeze dryer and a second group of filters to reach an adsorption dryer, then a three-way valve is opened, the high-pressure helium gas correspondingly enters a leak point detector and a pneumatic tool clamp through a third group of filters, detection work of a plurality of groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses semi-finished parts and finished products can be completed, the leak point detector and the pneumatic tool clamp are connected through a 25 PNI/O connecting wire and a phi 4 test tube, the 25 PNI/O connecting wire is mainly used for data instruction transmission work of the leak point detector and the pneumatic tool clamp, and the one phi 4 test tube is mainly used for high-pressure helium gas transmission intercommunication work of the leak point detector and the pneumatic tool clamp;
step three: then sequentially placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components in a pneumatic tool fixture for positioning, regulating high-pressure helium gas in a gas storage tank in a gas circuit pipeline network of a factory through a pressure regulating valve, sequentially starting an electromagnetic valve Y6 and an electromagnetic valve Y4, detecting the pressure of the entered helium gas in real time through a high-pressure sensor, simultaneously starting two groups of electromagnetic valves Y3, detecting the pressure difference of the entered high-pressure helium gas through a differential pressure sensor in real time, finally plugging at a standard port of a leak point detection machine by a standard plugging block to form a closed space, and then feeding the high-pressure helium gas after reaching the test pressure into the leak point detection machine through the test port, wherein the leak point detection machine performs a leak detection operation on the plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components by the leak detection machine, if the lower limit of the air inlet lower limit is less than the test pressure and the leak lower limit is met simultaneously, outputting OK signals on the basis of the intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components by the differential pressure sensor, and the intelligent AR glasses semi-finished product components by the leak detection machine is not met completely, and if the leak detection results of the leak detection is not met completely and the leak detection results are not met, and the leak detection results are not met completely, and the leak detection of the leak detection operation is finished completely is finished by the intelligent wearing watches, and the three groups of the intelligent wearing watches is not met completely, and the leak detection machine is completely. Checking leakage-proof conditions of a plurality of groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step four: then, respectively placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components after leak detection into an air tightness detector and a water tank to carry out air tightness detection and water soaking experiments, correcting equipment programs of the air tightness detector according to required parameters of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, checking leakage and air tightness of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step five: then sequentially placing three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products in a pneumatic fixture for positioning, and outputting OK signals by a leak point detector if the conditions of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper large leak limit and the lower leak limit < leak value < upper leak limit are met at the same time, wherein the leak point detector outputs OK signals, the sealing leak detection work is completed by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products, the sealing leak detection result is accurate and effective, the leak point detector outputs NG signals if any condition of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper leak limit and the leak value < upper leak limit is not met, the sealing leak detection result is invalid by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR finished products, the sealing leak detection work is repeated three times, and the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR finished products are completely completed by waiting for re-detection, and the actual leak detection result is recorded by three groups of intelligent wearing watches and the intelligent glasses finished products;
step six: then, three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products after leak detection are respectively placed into an air tightness detector and a water pool to carry out air tightness detection and a water soaking experiment, equipment programs of the air tightness detector are corrected according to required parameters of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, leakage-proof conditions of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products are checked, actual conditions and data results are recorded, helium is supplied to a leak detection machine when leak detection is carried out on the multi-group intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses semi-finished products and the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, high-pressure helium gas of the leak detection machine is formed after the helium gas is mixed, and a flow calculation formula of the high-pressure mixed helium gas is as follows: q (Q) Total (S) ＝(P1-P2)*V P ，Q Total (S) Is the total flow at the inlet of the leakage point detector, P1 is V P Helium in a leak detector for pumping speed at the entrance of the leak detectorThe air flow calculation formula is: q (Q) Helium ＝Q Total (S) *ρ＝(P1-P2)*V P * ρ, and Q Helium For the total flow of helium at the inlet of the leak detector, ρ is the density of helium in the high-pressure mixed helium gas, and the calculation formula of the flow relation between the high-pressure mixed helium gas pressure and the helium in the leak detector is as follows: l=k×q Helium ＝K*(P1-P2)*V P * ρ, and L is the high pressure mixed helium gas output pressure of leak source detector in the formula, K is leak source detector linear performance parameter, is the variable, and K=1, 2, 3, … …, N improves leak source detector to intelligent wrist-watch, bluetooth headset and intelligent AR glasses semi-manufactured goods and finished product's detection accuracy, and V in the leak source detector is big leak standard value, and V's calculation formula is: V=ΔP 1-V2= (P1-P2) V1-V2, P1 is the highest pressure value of the pre-inflation reaching inflation stage, P2 is the lowest pressure value of the pre-inflation reaching inflation stage, ΔP is the pressure difference between P1 and P2, V1 is the highest maximum leakage upper limit value of test pressure, V2 is the lowest maximum leakage lower limit value of test pressure, the calculation formula of the maximum leakage standard value is clear, the detection accuracy of semi-finished products and finished products of the intelligent watch, the Bluetooth headset and the intelligent AR glasses is further improved, so that error detection is prevented, the detection device is applicable to the intelligent watch, the Bluetooth headset and the intelligent AR glasses, other intelligent products are also applicable to the intelligent watch, the Bluetooth headset and the intelligent AR glasses, only by taking the intelligent watch, the intelligent AR glasses as an example, the flow of the steps one to six is matched, the high-pressure helium gas pressure parameters after entering are adjusted, the high-pressure helium gas meets the detection specified values, the semi-finished product components and the finished products are detected in a detection mode, the intelligent watch, the Bluetooth headset and the intelligent AR glasses are accurately detected, the error detection accuracy is improved, the problem of the intelligent watch, the error detection accuracy is also prevented, the intelligent watch, the error detection is prevented from occurring one by one after the high-pressure helium-inflation process, and the intelligent AR glasses are detected, and the error detection accuracy is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A helium mass spectrum type leak detection method is characterized in that: the method comprises the following steps:
step one: splitting the to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses respectively, correspondingly putting the to-be-tested semi-finished product components into semi-finished product detection boxes, pasting labels outside the semi-finished product detection boxes corresponding to the to-be-tested semi-finished product components of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection, simultaneously preparing a group of qualified finished products of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, correspondingly putting the qualified finished products into three groups of detection boxes, and correspondingly pasting the labels outside the three groups of detection boxes according to the correspondence of the intelligent wearing watch, the Bluetooth headset and the intelligent AR glasses, waiting for detection;
step two: after being pressurized by an air compressor, helium gas in a gas circuit pipe network of a factory is fed into a gas storage tank, then two groups of two-way valves are respectively opened, the high-pressure helium gas sequentially passes through a first group of filters, a freeze dryer and a second group of filters to reach the adsorption dryer, then a three-way valve is opened, and the high-pressure helium gas correspondingly enters a leakage point detector and a pneumatic tool fixture through a third group of filters, so that detection work of a plurality of groups of intelligent wearing watches, bluetooth headphones, intelligent AR glasses semi-finished product components and finished products can be completed;
step three: then sequentially placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components in a pneumatic tool fixture for positioning, regulating high-pressure helium gas in a gas storage tank in a gas circuit pipeline network of a factory through a pressure regulating valve, sequentially starting an electromagnetic valve Y6 and an electromagnetic valve Y4, detecting the pressure of the entered helium gas in real time through a high-pressure sensor, simultaneously starting two groups of electromagnetic valves Y3, detecting the pressure difference of the entered high-pressure helium gas through a differential pressure sensor in real time, finally plugging at a standard port of a leak point detection machine by a standard plugging block to form a closed space, and then feeding the high-pressure helium gas after reaching the test pressure into the leak point detection machine through the test port, wherein the leak point detection machine performs a leak detection operation on the plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components by the leak detection machine, if the lower limit of the air inlet lower limit is less than the test pressure and the leak lower limit is met simultaneously, outputting OK signals on the basis of the intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components by the differential pressure sensor, and the intelligent AR glasses semi-finished product components by the leak detection machine is not met completely, and if the leak detection results of the leak detection is not met completely and the leak detection results are not met, and the leak detection results are not met completely, and the leak detection of the leak detection operation is finished completely is finished by the intelligent wearing watches, and the three groups of the intelligent wearing watches is not met completely, and the leak detection machine is completely. Checking leakage-proof conditions of a plurality of groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step four: then, respectively placing a plurality of groups of intelligent wearing watches, bluetooth earphones and intelligent AR glasses semi-finished product components after leak detection into an air tightness detector and a water tank to carry out air tightness detection and water soaking experiments, correcting equipment programs of the air tightness detector according to required parameters of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, checking leakage and air tightness of the plurality of groups of intelligent wearing watches, the Bluetooth earphones and the intelligent AR glasses semi-finished product components, and recording actual conditions and data results;
step five: then sequentially placing three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products in a pneumatic fixture for positioning, and outputting OK signals by a leak point detector if the conditions of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper large leak limit and the lower leak limit < leak value < upper leak limit are met at the same time, wherein the leak point detector outputs OK signals, the sealing leak detection work is completed by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products, the sealing leak detection result is accurate and effective, the leak point detector outputs NG signals if any condition of the lower air inlet limit < test pressure < upper air inlet limit, the lower large leak limit < V < upper leak limit and the leak value < upper leak limit is not met, the sealing leak detection result is invalid by three groups of intelligent wearing watches, bluetooth headphones and intelligent AR finished products, the sealing leak detection work is repeated three times, and the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR finished products are completely completed by waiting for re-detection, and the actual leak detection result is recorded by three groups of intelligent wearing watches and the intelligent glasses finished products;
step six: and then respectively placing three groups of intelligent wearing watches, bluetooth headphones and intelligent AR glasses finished products after leak detection into an air tightness detector and a water tank for air tightness detection and water soaking experiments, correcting equipment programs of the air tightness detector according to required parameters of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, checking the air tightness of the three groups of intelligent wearing watches, the Bluetooth headphones and the intelligent AR glasses finished products, and recording actual conditions and data results.
2. The method for detecting helium mass spectrometer leak according to claim 1, wherein: in the first step, the to-be-detected semi-finished product components of the intelligent wearable watch are as follows: the card holds in palm after the injection molding sealing washer region and middle frame button equipment region, and the finished product detection position of wrist-watch is dressed to intelligence is: the area of the joint of the screen and the middle frame, the charging PIN area and the heart rate detector area on the bottom shell.
3. The method for detecting helium mass spectrometer leak according to claim 1, wherein: in the first step, the to-be-detected semi-finished product components of the Bluetooth headset are as follows: the finished product detection position of bluetooth headset is in the combination region of decoration and procapsid, the PIN region that charges of backshell, loudspeaker point gum region and pilot lamp region: and assembling the front and rear shells into a dispensing area.
4. The method for detecting helium mass spectrometer leak according to claim 1, wherein: in the first step, the to-be-detected semi-finished product components of the intelligent AR glasses are as follows: front and back shell area, miniature projector lens area and winding displacement area on the miniature projector assembly and terminal wire assembly area, anterior segment winding displacement connection area and button equipment area on the main part backshell, intelligent AR glasses's finished product detects the position and does: and a combination area of the main body rear case, the micro projector assembly and the main body front case.
5. The method for detecting helium mass spectrometer leak according to claim 1, wherein: in the second step, the leak detector and the pneumatic tool fixture are connected by a 25 PNI/O connecting wire and a phi 4 test tube, the 25 PNI/O connecting wire is mainly used for data instruction transmission work of the leak detector and the pneumatic tool fixture, and the phi 4 test tube is mainly used for high-pressure helium gas transmission intercommunication work of the leak detector and the pneumatic tool fixture.
6. The method for detecting helium mass spectrometer leak according to claim 1, wherein: in the third to sixth steps, when leak detection is performed on the semi-finished product components of the intelligent wearing watches, the Bluetooth headset and the intelligent AR glasses and the finished products of the intelligent wearing watches, the Bluetooth headset and the intelligent AR glasses, helium is supplied to the leak detection machine, the helium and high-pressure helium gas of the leak detection machine are mixed to form high-pressure mixed helium gas, and a flow calculation formula of the high-pressure mixed helium gas is as follows: q (Q) Total (S) ＝(P1-P2)*V P ，Q Total (S) Is the total flow at the inlet of the leakage point detector, P1 is V P Is the pumping speed at the inlet of the leak detector.
7. A helium according to claim 6The detection method of mass spectrum type leak tightness is characterized by comprising the following steps: in the third to sixth steps, the calculation formula of the helium flow in the leak detector is as follows: q (Q) Helium ＝Q Total (S) *ρ＝(P1-P2)*V P * ρ, and Q Helium And (4) the total flow rate of helium at the inlet of the leak detector, wherein ρ is the density of helium in the high-pressure mixed helium gas.
8. The method for detecting helium mass spectrometer leak according to claim 6, wherein: in the third to sixth steps, the calculation formula of the flow relation between the high-pressure mixed helium gas pressure and helium gas in the leak point detector is as follows: l=k×q Helium ＝K*(P1-P2)*V P * ρ, where L is the high pressure mixed helium gas output pressure of the leak detector, K is the leak detector linear performance parameter, and k=1, 2, 3, … …, N.
9. The method for detecting helium mass spectrometer leak according to claim 6, wherein: in the fifth and sixth steps, V in the leak detector is a large leak standard value, and the calculation formula of V is: v=Δpv1-v2= (P1-P2) ×v1-V2, where P1 is the highest pressure value for the pre-charge to reach the inflation stage, P2 is the lowest pressure value for the pre-charge to reach the inflation stage, Δp is the pressure difference between P1 and P2, V1 is the highest leakage upper limit value for the test pressure, and V2 is the lowest leakage lower limit value for the test pressure.
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