CN115479733A - Device and method for detecting air tightness of car lamp - Google Patents
Device and method for detecting air tightness of car lamp Download PDFInfo
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- CN115479733A CN115479733A CN202110661724.0A CN202110661724A CN115479733A CN 115479733 A CN115479733 A CN 115479733A CN 202110661724 A CN202110661724 A CN 202110661724A CN 115479733 A CN115479733 A CN 115479733A
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- air pressure
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- car
- car lamp
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- 238000000034 method Methods 0.000 title claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 239000007789 gas Substances 0.000 claims abstract description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000002808 molecular sieve Substances 0.000 claims description 12
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 12
- 238000009833 condensation Methods 0.000 description 9
- 230000005494 condensation Effects 0.000 description 9
- 238000007791 dehumidification Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- G01M3/26—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
Abstract
The invention provides a method and a device for detecting the air tightness of a car lamp. The method for detecting the air tightness of the car lamp comprises the following steps: fixing the automobile lamp on a tool table, connecting a high-pressure gas delivery nozzle with an automobile lamp through hole, filling nitrogen into the automobile lamp, and simultaneously blocking other holes of the automobile lamp; monitoring the air pressure in the car lamp, and when the air pressure reaches a target air pressure, separating the conveying air nozzle from the car lamp through hole to block the car lamp through hole; and monitoring the air pressure in the car lamp, and detecting the reduction rate of the air pressure in the test time when the air pressure reaches the detection air pressure. By adopting the technical scheme, the air tightness of the car lamp can be effectively detected, the car lamp can be further dehumidified, other hardware devices are not needed, and the detection and production cost is reduced.
Description
Technical Field
The invention relates to the field of vehicle lamps, in particular to a device and a method for detecting the air tightness of a vehicle lamp.
Background
In the prior art, the air tightness detection of the vehicle lamp is an important detection step. Meanwhile, the condensation fog phenomenon of the automobile lamp caused by the temperature difference is always a difficult and miscellaneous disease which troubles automobile terminal users, and various automobile lamp dehumidification schemes are generated by the way, for example, an air circulation ventilation system is designed for the automobile lamp, and a fan is installed; the dehumidifying system is assembled on the vehicle lamp and comprises a sensor detection module, a semiconductor condensation module, a drainage module and the like; however, these physical and electromechanical systems have complicated structures and limited dehumidification effects, and the industrial development of semiconductor condensation modules for automobile lamps requires systematic development, which is expensive and time-consuming to apply in batch to the field of lamps.
Therefore, the air-tightness detection and dehumidification step of the vehicle lamp is a necessary processing step before the vehicle lamp is put into use. In the prior art, two steps need to be separately carried out, so that not only is time wasted, but also the production cost is high.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a method and a device for detecting the air tightness of a vehicle lamp.
Specifically, the method for detecting the air tightness of the vehicle lamp comprises the following steps:
fixing the car lamp on a tool table, connecting a high-pressure gas delivery nozzle with a car lamp through hole, filling nitrogen into the car lamp, and simultaneously blocking other holes of the car lamp; monitoring the internal air pressure of the car lamp, and when the internal air pressure reaches a target air pressure, separating the conveying air nozzle from the car lamp through hole to block the car lamp through hole; and monitoring the internal air pressure, and detecting the reduction rate of the internal air pressure in the test time when the internal air pressure reaches the detection air pressure.
Preferably, detect in the test time behind the reducing rate of inside atmospheric pressure, open car light through-hole and the trompil, use nitrogen-making carbon molecular sieve package to block simultaneously car light through-hole and the trompil.
Preferably, the automobile lamp is fixed on the tooling table, the high-pressure gas conveying nozzle is connected with the automobile lamp through hole, nitrogen is filled into the automobile lamp, and other holes of the automobile lamp are blocked after the nitrogen is filled for the first time.
Preferably, the car light is fixed on the tooling table, and the lens of the car light is placed upwards.
In another aspect of the present invention, a device for detecting the air tightness of a vehicle lamp is provided, which comprises a tooling table, an air tightness detecting table and a high pressure gas source; the fixture table comprises a clamping unit and a positioning unit, and the clamping unit fixes the car lamp to the fixture table; the high-pressure gas source is used for providing high-pressure nitrogen and comprises a high-pressure gas manufacturing unit and a high-pressure gas conveying unit, wherein the high-pressure gas manufacturing unit is used for manufacturing the high-pressure nitrogen, the high-pressure gas manufacturing unit is connected with a through hole of the automobile lamp through a conveying air nozzle in the high-pressure gas conveying unit, the nitrogen is filled into the automobile lamp, and meanwhile the positioning unit blocks other holes of the automobile lamp; the air tightness detection platform monitors the internal air pressure of the automobile lamp, when the internal air pressure reaches a target air pressure, the conveying air nozzle is separated from the automobile lamp through hole, and the positioning unit blocks the automobile lamp through hole; the airtight detection platform continuously monitors the internal air pressure, and when the internal air pressure reaches the monitoring air pressure, the reduction rate of the internal air pressure is detected in the testing time.
Preferably, the air pressure reduction rate is detected within the air tightness detection table test time; the positioning unit releases the car lamp through hole and the hole, and the nitrogen-making carbon molecular sieve bag is used for blocking the car lamp through hole and the hole.
Preferably, the high-pressure gas manufacturing unit is used for manufacturing high-pressure nitrogen, the conveying air nozzle in the high-pressure gas conveying unit is connected with the through hole of the automobile lamp, the automobile lamp is filled with the nitrogen, and after the nitrogen is filled for the first time, the positioning unit is used for blocking other holes of the automobile lamp.
Preferably, the clamping unit fixes the car lamp to the tool table, and when the car lamp is fixed, the lens of the car lamp is placed upwards.
The method and the device for detecting the air tightness of the car lamp can effectively detect the air tightness of the car lamp, can further dehumidify the car lamp, do not need to be additionally provided with other hardware devices, and save an air circulation ventilation system in the prior art, such as a fan; and a dehumidifying system comprising a sensor detection module, a semiconductor condensation module, a drainage module and the like is not required to be assembled on the automobile lamp. The detection steps of the car lamp are saved, hardware devices are further saved, and the detection and production cost is reduced.
Drawings
FIG. 1 is a flow chart of a method for detecting air tightness of a vehicular lamp according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the variation of the air pressure inside the vehicle lamp measured by the method shown in FIG. 1;
FIG. 3 is a flow chart of another method for detecting air tightness of a vehicular lamp according to an embodiment of the present invention;
t1: starting a test time; t2: ending the test time;
p1 is the air pressure at the beginning of the test; p2: the air pressure after the test was finished.
Detailed Description
The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and those skilled in the art will understand the specific meaning of the terms as they are used in the specific case.
Fig. 1 is a flow chart of a method for detecting air tightness of a vehicle lamp according to an embodiment of the present invention. Referring to fig. 1, the method for detecting the airtightness of the vehicle lamp according to the present invention includes:
s1: the automobile lamp is fixed on the tooling table, the high-pressure gas conveying nozzle is connected with the automobile lamp through hole, nitrogen is filled into the automobile lamp, and other holes of the automobile lamp are plugged.
In the prior art, when the air tightness of the vehicle lamp is detected, high-pressure air is generally filled into the vehicle lamp for subsequent tests in consideration of cost and operability. According to the invention, nitrogen is filled into the automobile lamp, so that on one hand, air containing moisture in the automobile lamp can be discharged, the dryness in the automobile lamp is ensured, and the phenomenon that water mist in the automobile lamp affects subsequent use is avoided; and on the other hand, inert gas is filled, an air circulation ventilation system in the automobile lamp is not required to be additionally arranged, and the requirement on hardware can be effectively reduced. More preferably, after filling nitrogen gas into the lamp, the nitrogen gas is continuously filled for a certain period of time, and then other openings of the lamp are closed for sufficient gas discharge.
S2: the inside atmospheric pressure of monitoring car light, treat when atmospheric pressure reaches target atmospheric pressure, carry the air cock with the car light through-hole breaks away from, plugs up the car light through-hole.
The target air pressure can be preset, the specific value of the target air pressure is not particularly limited, and the target air pressure is only required to be higher than the atmospheric pressure so that the interior of the automobile lamp is in a high-pressure state.
S3: and monitoring the internal air pressure, and detecting the reduction rate of the internal air pressure in the test time when the internal air pressure reaches the detection air pressure.
Fig. 2 is a schematic view showing the change of the air pressure in the vehicle lamp with time according to the present embodiment. Because the high-pressure gas is filled, the gas in the vehicle lamp can flow, the temperature in the vehicle lamp can be raised temporarily, and the air pressure in the vehicle lamp can be unstable, so that a steady-state time needs to be set, and the reduction rate of the air pressure is measured when the air pressure in the vehicle lamp is in a steady state. The reduction rate is characterized by the reduction rate of the air pressure in the test time, and is specifically (P1-P2)/(t 2-t 1), wherein (t 2-t 1) is the test time, P1 is the test pressure, and P2 is the air pressure value in the automobile lamp after the test time. And when the measured reduction rate is less than a threshold value, determining that the air tightness of the vehicle lamp meets the requirement. The specific threshold value varies according to the specific type of the vehicle lamp. Therefore, the present invention is not limited thereto, and can be configured according to practical requirements.
Fig. 3 is a flow chart of another method for detecting air-tightness of a vehicular lamp according to an embodiment of the present invention. Detect in the test time behind the reducing rate of atmospheric pressure, open the car light through-hole and the trompil uses nitrogen-making carbon molecular sieve package to plug up simultaneously car light through-hole and the trompil.
In the prior art, a vent film or an O-ring is generally used to seal all through holes of a vehicle lamp. The breathable film and the O-shaped ring cannot effectively promote the gas circulation in the automobile lamp, and when temperature difference is generated, the condensation fog phenomenon is easily generated in the automobile lamp. According to the invention, nitrogen is firstly filled into the automobile lamp to extrude the air in the automobile lamp, and the nitrogen-making carbon molecular sieve bag is used for blocking the through hole and the open hole of the automobile lamp, so that the interior of the automobile lamp is always filled with dry inert gas, and the condensation fog phenomenon of the automobile lamp can be effectively avoided.
The nitrogen making principle of the nitrogen making carbon molecular sieve is as follows: by utilizing the transport adsorption characteristic of the carbon molecular sieve, namely the equilibrium adsorption capacity of the carbon molecular sieve to oxygen and nitrogen is similar, but because the molecular size (2.8 multiplied by 3.9) of oxygen is smaller than the molecular size (3.0 multiplied by 4.1) of nitrogen, the diffusion speed of oxygen in the carbon molecular sieve is high, and oxygen is adsorbed and flows out of the nitrogen as a product. After a period of time, the air introduction is stopped, and the bed layer is vacuumized to regenerate the carbon molecular sieve. This method is usually carried out under the conditions of 0.1 to 0.5X 106pa in the adsorption stage and normal pressure or vacuum and normal temperature in the desorption stage, and is industrially easily realized.
Therefore, even if the nitrogen-producing carbon molecular sieve is an existing technology, the nitrogen is filled into the automobile lamp in the invention, so that the fog condensation phenomenon of the automobile lamp can be effectively avoided.
The method for detecting the air tightness of the car lamp can effectively detect the air tightness of the car lamp, can further dehumidify the car lamp, does not need to additionally arrange other hardware devices, and saves an air circulation ventilation system in the prior art, such as a fan; and a dehumidifying system comprising a sensor detection module, a semiconductor condensation module, a drainage module and the like is not required to be assembled on the automobile lamp. The detection steps of the car lamp are saved, hardware devices are further saved, and the detection and production cost is reduced.
In addition, the present invention also provides a device for detecting the air tightness of the car lamp, which has the same technical characteristics as the above method for detecting the air tightness of the car lamp, and the present invention is not described herein again.
In one embodiment consistent with the present invention, the device for detecting the air tightness of the vehicle lamp comprises a tool table, an air tightness detection table and a high-pressure gas source; the fixture table comprises a clamping unit and a positioning unit, and the clamping unit fixes the car lamp to the fixture table; the high-pressure gas source is used for providing high-pressure nitrogen and comprises a high-pressure gas manufacturing unit and a high-pressure gas conveying unit, wherein the high-pressure gas manufacturing unit is used for manufacturing the high-pressure nitrogen, is connected with a through hole of the automobile lamp through a conveying nozzle in the high-pressure gas conveying unit, is used for filling the nitrogen into the automobile lamp, and simultaneously is used for plugging other holes of the automobile lamp by the positioning unit; the air tightness detection platform monitors air pressure in the automobile lamp, when the air pressure reaches a target air pressure, the conveying air faucet is separated from the automobile lamp through hole, and the positioning unit blocks the automobile lamp through hole; the airtight detection platform continuously monitors the internal air pressure of the car lamp, and when the internal air pressure reaches the monitored air pressure, the reduction rate of the internal air pressure is detected in the test time.
The car lamp air tightness detection device integrates the air tightness detection and car lamp dehumidification steps into one device, and simultaneously carries out the air tightness detection and the car lamp dehumidification. From the perspective of a detection process, the detection steps of the car lamp are effectively shortened; in terms of the service performance of the automobile lamp, the condensation fog phenomenon of the automobile lamp can be effectively avoided, and the subsequent use of the automobile lamp is facilitated; from a production perspective, the integration of the device is beneficial to reduce the detection and production costs of the vehicle lamp.
It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.
Claims (8)
1. A method for detecting the air tightness of a car lamp is characterized in that,
fixing the car lamp on a tool table, connecting a high-pressure gas delivery nozzle with a car lamp through hole, filling nitrogen into the car lamp, and simultaneously blocking other holes of the car lamp;
monitoring the internal air pressure of the car lamp, and when the air pressure reaches a target air pressure, separating the conveying air nozzle from the car lamp through hole to block the car lamp through hole;
and monitoring the internal air pressure, and detecting the reduction rate of the internal air pressure in the test time when the internal air pressure reaches the detection air pressure.
2. The method for detecting the airtightness of a vehicular lamp according to claim 1,
after detecting the rate of decrease in the internal air pressure during the test time,
opening the car light through hole and the trompil, use nitrogen-making carbon molecular sieve package to plug up simultaneously the car light through hole and the trompil.
3. The method for detecting the airtightness of a vehicular lamp according to claim 2,
the automobile lamp is fixed on the tooling table, the high-pressure gas conveying nozzle is connected with the automobile lamp through hole, nitrogen is filled into the automobile lamp, and other holes of the automobile lamp are blocked after the nitrogen is filled for the first time.
4. The airtightness detection method for vehicular lamp according to claim 3, wherein the air-tightness of the vehicular lamp is detected,
the car light is fixed in the tool table, and the lens of the car light is placed upwards.
5. The device for detecting the air tightness of the car lamp is characterized by comprising a tool table, an air tightness detection table and a high-pressure gas source; the fixture table comprises a clamping unit and a positioning unit, and the clamping unit fixes the car lamp on the fixture table;
the high-pressure gas source is used for providing high-pressure nitrogen and comprises a high-pressure gas manufacturing unit and a high-pressure gas conveying unit, wherein the high-pressure gas manufacturing unit is used for manufacturing the high-pressure nitrogen, is connected with a through hole of the automobile lamp through a conveying nozzle in the high-pressure gas conveying unit, is used for filling the nitrogen into the automobile lamp, and simultaneously is used for plugging other holes of the automobile lamp by the positioning unit;
the air tightness detection platform monitors the internal air pressure of the car lamp, when the internal air pressure reaches a target air pressure, the conveying air faucet is separated from the car lamp through hole, and the positioning unit blocks the car lamp through hole;
the air tightness detection table continuously monitors the internal air pressure, and when the internal air pressure reaches the monitoring air pressure, the reduction rate of the internal air pressure is detected in the test time.
6. The airtightness detection apparatus for vehicular lamp according to claim 5, wherein,
detecting a reduction rate of the internal air pressure within a test time of the airtight test table;
the positioning unit releases the car lamp through hole and the hole, and the nitrogen-making carbon molecular sieve bag is used for blocking the car lamp through hole and the hole.
7. The airtightness detection apparatus for vehicular lamp according to claim 6, wherein,
the high-pressure gas manufacturing unit is used for manufacturing high-pressure nitrogen, the conveying air nozzle in the high-pressure gas conveying unit is connected with the through hole of the automobile lamp, the automobile lamp is filled with the nitrogen, and after the nitrogen is filled for the first time, the positioning unit is used for blocking other holes of the automobile lamp.
8. The airtightness detection apparatus for vehicle lamps according to claim 7,
the clamping unit is used for fixing the car lamp on the tool table, and when the tool table is fixed, the lens of the car lamp is placed upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661724.0A CN115479733A (en) | 2021-06-15 | 2021-06-15 | Device and method for detecting air tightness of car lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661724.0A CN115479733A (en) | 2021-06-15 | 2021-06-15 | Device and method for detecting air tightness of car lamp |
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| CN115479733A true CN115479733A (en) | 2022-12-16 |
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| CN202110661724.0A Pending CN115479733A (en) | 2021-06-15 | 2021-06-15 | Device and method for detecting air tightness of car lamp |
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|---|---|---|---|---|
| CN103616137A (en) * | 2013-10-25 | 2014-03-05 | 苏州恩意精密机械有限公司 | An operating method of a rear automobile lamp detecting clamp of an automobile lamp air tightness detecting machine |
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| CN109060272A (en) * | 2018-09-17 | 2018-12-21 | 昆山睿力得软件技术有限公司 | A kind of car light air tightness detection equipment |
| CN109580117A (en) * | 2018-11-09 | 2019-04-05 | 成都珂睿科技有限公司 | A method of assessment high-pressure fluid device leakage |
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2021
- 2021-06-15 CN CN202110661724.0A patent/CN115479733A/en active Pending
Patent Citations (8)
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| CN103616137A (en) * | 2013-10-25 | 2014-03-05 | 苏州恩意精密机械有限公司 | An operating method of a rear automobile lamp detecting clamp of an automobile lamp air tightness detecting machine |
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