CN110793733A - Sensor air tightness detection device and method - Google Patents
Sensor air tightness detection device and method Download PDFInfo
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- CN110793733A CN110793733A CN201911251357.6A CN201911251357A CN110793733A CN 110793733 A CN110793733 A CN 110793733A CN 201911251357 A CN201911251357 A CN 201911251357A CN 110793733 A CN110793733 A CN 110793733A
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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
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a sensor air tightness detection device and a sensor air tightness detection method, which comprise a carrier, a material pressing mechanism and a detection mechanism, wherein a sensor placing groove is formed in the carrier, the material pressing mechanism is supported above the sensor placing groove, the material pressing mechanism comprises a material pressing cylinder and a pressing strip, the pressing strip is driven by the material pressing cylinder to move up and down, the shape of the pressing strip is matched with that of the sensor placing groove, the detection mechanism is arranged on the side edge of the material pressing mechanism, the detection mechanism comprises a Z-axis transfer component, a pressure sensor and a pressing rod, the pressure sensor and the pressing rod are connected with the Z-axis transfer component, one end of the pressing rod points to the sensor placing groove, and the other end. The invention changes the internal pressure through extrusion, thereby realizing the detection of the air leakage performance of the sensor by utilizing the pressure change, having high efficiency, convenience, good detection effect and no damage to the sensor.
Description
Technical Field
The invention relates to the technical field of automobile part detection, in particular to a sensor airtightness detection device and method.
Background
With the development of the large-scale production of automobile parts, the product quality becomes the most concerned index of a plurality of automobile part manufacturing enterprises, and the quality guarantee capability is the core force for determining the continuous development of the enterprises.
In the automobile industry, most parts belong to outsourcing parts, and the quality detection and guarantee of the outsourcing parts become an important link. The sensor product belongs to one of the key safety parts of the automobile, the sensor is wrapped in the rubber sheath, the sensor is in a strip shape, one end of the sensor is connected with the lead, the sensor is wrapped outside the sensor in a sealing mode through the rubber sheath, the air tightness of the rubber sheath needs to be guaranteed to be 100% qualified, if the air tightness does not meet the requirement, the problems that the sensor enters water and the like can occur, the function of the product is directly affected, the sensor fails, the safety system is damaged, and the driving safety is seriously affected. The air tightness test of the rubber sheath is indispensable.
The existing enterprise is not provided with a rubber sheath air tightness detection device, a sensor cannot be effectively controlled in quality, air tightness is not detected, and the sensor is directly assembled, so that air tightness unqualified products flow into the market, and the products fail in advance. The existing detection method only carries out sampling inspection after the product assembly is assembled and carries out a water pressure sealing experiment in a laboratory, so that the efficiency level is low; and after the experiment, the product can not be reused and is directly scrapped, thereby causing waste.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the air tightness of a sensor, so as to improve the detection efficiency of a rubber sheath of the sensor.
In order to solve the technical problem, the invention provides sensor air tightness detection equipment which comprises a carrier, a pressing mechanism and a detection mechanism, wherein a sensor placing groove is formed in the carrier, the pressing mechanism is supported above the sensor placing groove, the pressing mechanism comprises a pressing cylinder and a pressing strip, the pressing strip is driven by the pressing cylinder to move up and down, the pressing strip is matched with the sensor placing groove in shape, the detection mechanism is arranged on the side edge of the pressing mechanism, the detection mechanism comprises a Z-axis transfer assembly, a pressure sensor and a pressure rod, the pressure sensor and the pressure rod are connected with the Z-axis transfer assembly, one end of the pressure rod points to the sensor placing groove, and the other end of the pressure rod is abutted to the pressure sensor.
Further, the material pressing mechanism is located above the middle of the sensor placing groove, and the detection mechanism is located on two sides of the material pressing mechanism.
Further, still be provided with the lead wire standing groove on the carrier, lead wire standing groove one side is connected with the label standing groove, it inhales the hole to communicate there is the label in the label standing groove.
Further, press material cylinder one side to be provided with and sweep a yard rifle, sweep a yard rifle with label standing groove position corresponds.
Furthermore, a destruction mechanism is arranged on the outer side of one of the detection mechanisms, and the destruction mechanism corresponds to the outer side of one end of the carrier.
Furthermore, the center of the pressing strip is hinged with the pressing cylinder.
Furthermore, the carriers are arranged on the turntable mechanism, and the two carriers are arranged on the turntable mechanism in a centrosymmetric manner.
Further, carousel mechanism includes carousel, gear, rack and transmission cylinder, the carousel with the gear coaxial linking to each other, the gear with the rack cooperation, the rack by transmission cylinder promotes round trip movement.
Further, at least one sensor placing groove is arranged on the carrier in parallel, and the pressing mechanism and the detection mechanism are matched with different sensor placing grooves through the X-axis transfer mechanism.
A method for detecting the air tightness of a sensor comprises the following steps:
measuring the pressure P required to press the sensor down a distance d in the natural state1；
Pressing a part of the sensor, and measuring the pressure P required for pressing the sensor down by the distance d2；
Comparison P1And P2And judging whether the sensor leaks air or not.
Compared with the prior art, the equipment and the method for detecting the air tightness of the sensor have the advantages that the internal pressure is changed through extrusion, so that the air leakage performance of the sensor is detected by utilizing the pressure change, the equipment and the method are efficient, convenient and fast, the detection effect is good, and the sensor is not damaged.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of the turntable mechanism of the present invention;
FIG. 4 is an enlarged view of the swage mechanism of the present invention;
fig. 5 is a schematic view of the detection mechanism of the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, which is a schematic view of an overall structure of an embodiment of a sensor airtightness detection apparatus according to the present invention, the apparatus includes a carrier 10, a pressing mechanism 20, and a detection mechanism 30, where the carrier 10 is configured to carry a sensor to be detected, first, the detection mechanism 30 presses down the sensor placed on the carrier 10 in a natural state without any treatment for a certain distance to perform pressure detection, and then, the pressing mechanism 20 presses down the sensor, and as gas in the sensor is transferred to a non-pressed portion after the sensor is pressed, the sensor at the non-pressed portion is pressed for the same distance, if the sensor is airtight, a pressure value detected for the second time should be greater than a pressure value measured for the first time, and a difference between the two values can be estimated, and if the difference between the two values does not reach an estimated value, it can be determined that the sensor is airtight.
Specifically, as shown in fig. 2, a sensor placement groove 11 is provided on the carrier 10, a sensor is placed in the sensor placement groove 11, a sensor suction hole 12 is provided in the sensor placement groove 11 for fixing the sensor, and the sensor is adsorbed in the sensor placement groove 11 through the sensor suction hole 12. Since the sensor is further connected with a lead, in order to fix the lead, a lead placing groove 13 is further provided on the carrier 10. After the sensor is completely placed in the sensor placement groove 11, the lead wire is wound back from the outside of the carrier 10, and one end of the lead wire is placed in the lead placement groove 13. Further, in order to determine the placement position of the lead wire and prevent the label on the lead wire from being unfixed in position to interfere with detection, a label placement groove 14 is connected to one side of the lead wire placement groove 13, and a label suction hole 15 is communicated with the label placement groove 14. At this moment, the label is fixed in position and adsorbed and laid in the label placing groove 14, and the label is conveniently swept. Sweep sign indicating number rifle 60 with label standing groove 14 position corresponds, sets up in swager 20 one side, when detecting out that the sensor gas tightness is good, sweeps sign indicating number rifle 60 and sweeps the sign indicating number from the top to the label, and to the unqualified product of gas tightness, then does not sweep a sign indicating number operation.
Referring to fig. 1 and 2, in another embodiment of the present invention, in order to improve the working efficiency, at least one sensor placing groove 11 is arranged in parallel on one carrier 10, in this embodiment, two sensor placing grooves 11 are arranged on the carrier 10, and in order to implement the operation of the sensors in the two sensor placing grooves 11, the pressing mechanism 20 and the detecting mechanism 30 are driven to cooperate with different sensor placing grooves 11 by the X-axis transferring mechanism 40. In this embodiment, the X-axis transfer mechanism 40 includes a transfer plate 41, a transfer rail 42 and a transfer cylinder 43, the pressing mechanism 20 and the detection mechanism 30 are disposed on the transfer plate 41, the transfer rail 42 is supported below two ends of the transfer plate 41, and the transfer cylinder 43 pushes the transfer plate 41 to move along the direction of the transfer rail 42, so as to push the pressing mechanism 20 and the detection mechanism 30 to cooperate with the sensor placement grooves 11 at different positions.
Referring to fig. 3, in another embodiment of the present invention, to further improve the working efficiency, the carriers 10 are disposed on a turntable mechanism 50, and two carriers 10 are disposed on the turntable mechanism 50 in a central symmetry manner. When the pressing mechanism 20 and the detecting mechanism 30 operate one carrier 10, the other carrier 10 is rotated out of the range of the pressing mechanism 20 and the detecting mechanism 30, so that the loading and unloading operation of the carrier 10 is facilitated. At this time, the two carriers 10 respectively execute the operations of loading, unloading and detection, so that the working efficiency is doubled. Since the two carriers 10 can achieve the purpose of improving the working efficiency, and the divider is suitable for providing a plurality of stations, and the price of the divider is high, the turntable mechanism 50 in the embodiment is driven by the gear 52 and the rack 53. Specifically, the turntable mechanism 50 includes a turntable 51, a gear 52, a rack 53 and a transmission cylinder 54, the turntable 51 is coaxially connected with the gear 52, the gear 52 is matched with the rack 53, and the rack 53 is pushed by the transmission cylinder 54 to move back and forth. When the transmission cylinder 54 pushes out the rack 53, the rack 53 drives the gear 52 to rotate 180 degrees, the turntable 51 rotates 180 degrees at the same time, the two carriers 10 are exchanged, the carrier 10 with the sensors placed thereon is sent to the lower parts of the pressing mechanism 20 and the detection mechanism 30, the sensors which have finished detection are sent out, and the sensors to be detected can be conveniently taken down and replaced by new sensors to be detected. When the transmission cylinder 54 retracts the rack 53, the turntable 51 rotates in reverse 180 degrees, and the two carriers 10 are exchanged again.
Referring to fig. 4, the pressing mechanism 20 is supported above the sensor placement groove 11, the pressing mechanism 20 includes a pressing cylinder 21 and a pressing strip 22, the pressing strip 22 is driven by the pressing cylinder 21 to move up and down, and the pressing strip 22 is matched with the sensor placement groove 11 in shape. During operation, the pressing cylinder 21 pushes the pressing strip 22 downwards, and the length of the pressing strip 22 is smaller than that of the sensor placing groove 11, so that the pressing strip 22 extrudes the sensor, and gas in the sensor can be extruded to other positions in the sensor. In the present embodiment, the swaging mechanism 20 is provided above one side of the sensor placement groove 11, and the detection mechanism 30 is provided above the other side of the sensor placement groove 11.
In other embodiments of the present invention, the pressing mechanism 20 is located above the middle of the sensor placement groove 11, and in order to ensure that the pressures in the sensors on both sides of the pressing bar 22 are balanced when the pressing bar 22 is pressed down, the center of the pressing bar 22 is hinged to the pressing cylinder 21. Because the pressure is applied from the center of the pressing strip 22, when the stress at the two ends of the pressing strip 22 is not balanced, the pressing strip 22 automatically floats up and down to adjust the pressure. In this embodiment, the detecting mechanism 30 is located at two sides of the pressing mechanism 20. Because the two ends of the sensor are injection molding sealing ends, the possibility of air leakage is the greatest, the sensor is internally extruded to the two ends, and the two ends are subjected to pressure difference comparison, so that whether air leakage exists or not and which end of the sensor leaks air can be judged more easily.
Referring to fig. 5, the detection mechanism 30 includes a Z-axis transfer unit 31, and a pressure sensor 32 and a pressure lever 33 connected thereto, where one end of the pressure lever 33 points to the sensor placement groove 11, and the other end abuts against the pressure sensor 32. The Z-axis transfer assembly 31 drives the pressure sensor 32 and the pressure lever 33 to move up and down, when the lower portion of the pressure lever 33 presses against the sensor, the pressure lever 33 is applied with a reverse acting force to press the pressure sensor 32, and the pressure sensor 32 measures the pressure of the pressure lever 33 against the sensor. In order to prevent the pressure sensor 32 from being damaged by an excessive impact force when the plunger 33 is depressed, a buffer spring 34 is further provided between the plunger 33 and the pressure sensor 32.
When the invention works, after a sensor to be detected is placed on the carrier 10, the carrier 10 is transferred to the lower part of the material pressing mechanism 20 and the detection mechanism 30, the detection mechanism 30 firstly presses the sensor for a certain distance, and the pressure at the moment is recorded; then the pressing mechanism 20 is pressed downwards to extrude the sensor, so that the gas in the sensor is transferred to other positions, the pressure intensity of other parts of the sensor is increased, the detection mechanism 30 presses the sensor downwards for the same pair distance at the moment, and the pressure at the moment is recorded; the pressure recorded at this time is larger than the pressure when the sensor is not extruded by a certain value, the difference value of the pressures recorded at two times is compared, if the difference value is equal to the estimated value, the sensor is not leaked, the code scanning gun 60 scans the code of the sensor label, and if the difference value is larger than the estimated value, the sensor is leaked. To distinguish an unacceptable sensor, the unacceptable sensor needs to be cut. In this embodiment, a breaking mechanism 70 is disposed outside one of the detecting mechanisms 30, the breaking mechanism 70 corresponds to an outside of one end of the carrier 10, and specifically corresponds to one end of the lead which is wound back from the outside of the carrier 10, and at this time, a part of the lead is located outside the carrier 10, which is convenient for the breaking mechanism 70 to cut off the part. After the detection of the sensor is completed, the pressing mechanism 20 and the detecting mechanism 30 are moved to the upper side of the other sensor by the X-axis transfer mechanism 40, and the detection is performed. After all the sensors on one carrier 10 complete the detection, the turntable 51 rotates to send another carrier 10 to the lower side of the pressing mechanism 20 and the detection mechanism 30, and the detection action is repeated.
The invention also provides a method for detecting the air tightness of the sensor, which comprises the following steps:
measuring the pressure P required to press the sensor down a distance d in the natural state1(ii) a I.e. the pressure required to press the sensor down a distance d when it is not subjected to any operation, is measured, at which time the sensor is internally connected and the pressure required to press the sensor down a distance d is small.
By pressing a part of the sensorThe pressure P required for pressing the sensor down the distance d in this state2(ii) a The sensor is pressed, and the gas in the sensor is transferred to other parts, so that the pressure of other parts of the sensor is increased, and the pressure required for pressing the sensor for the same distance d is large.
If the sensor is airtight, P1And P2Is constant, so that P is compared1And P2If the difference value is approximate to the fixed value, judging that the sensor is airtight, and scanning the code by using a code scanning gun; if the difference value is larger than the fixed value, the air leakage of the sensor is judged, the lead of the sensor is cut off by a damage mechanism to be distinguished, and the detection of the sensor pair is completed.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a sensor gas tightness check out test set, its characterized in that, includes carrier, swager constructs and detection mechanism, be provided with the sensor standing groove on the carrier, swager constructs support in sensor standing groove top, swager constructs including pressing material cylinder and layering, the layering by press material cylinder drive from top to bottom, the layering with sensor standing groove shape phase-match, detection mechanism set up in the swager constructs the side, detection mechanism includes that the Z axle moves and carries subassembly and rather than pressure sensor and the depression bar of being connected, depression bar one end is directional sensor standing groove, the other end butt pressure sensor.
2. The sensor airtightness detection apparatus according to claim 1, wherein the pressing mechanism is located above a middle portion of the sensor placement groove, and the detection mechanisms are located on both sides of the pressing mechanism.
3. The apparatus for detecting airtightness of a sensor according to claim 1, wherein the carrier further has a lead-wire placement groove, a label placement groove is connected to one side of the lead-wire placement groove, and a label suction hole is communicated in the label placement groove.
4. The sensor airtightness detection apparatus according to claim 3, wherein a code scanning gun is provided on one side of the material pressing cylinder, and the code scanning gun corresponds to the label placement groove.
5. The apparatus of claim 1, wherein a breaking mechanism is disposed outside one of the detecting mechanisms, and the breaking mechanism corresponds to an outside of one end of the carrier.
6. The sensor airtightness detection apparatus according to claim 1, wherein the center of the bead is hinged to the swage cylinder as set forth in claim 1.
7. The apparatus of claim 1, wherein the carrier is disposed on a turntable mechanism, and two carriers are disposed on the turntable mechanism in a central symmetry manner.
8. The sensor airtightness detection apparatus according to claim 7, wherein the turntable mechanism includes a turntable, a gear, a rack, and a transmission cylinder, the turntable is coaxially connected to the gear, the gear is engaged with the rack, and the rack is pushed by the transmission cylinder to move back and forth.
9. The apparatus according to claim 1, wherein the carrier has at least one sensor slot, and the pressing mechanism and the detecting mechanism are driven by an X-axis transfer mechanism to engage with different sensor slots.
10. A method for detecting the airtightness of a sensor is characterized by comprising the following steps of:
measuring the pressure P required to press the sensor down a distance d in the natural state1；
Pressing a part of the sensor, and measuring the pressure P required for pressing the sensor down by the distance d2；
Comparison P1And P2And judging whether the sensor leaks air or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251357.6A CN110793733A (en) | 2019-12-09 | 2019-12-09 | Sensor air tightness detection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251357.6A CN110793733A (en) | 2019-12-09 | 2019-12-09 | Sensor air tightness detection device and method |
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| Publication Number | Publication Date |
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| CN110793733A true CN110793733A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911251357.6A Pending CN110793733A (en) | 2019-12-09 | 2019-12-09 | Sensor air tightness detection device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465841A (en) * | 2021-06-30 | 2021-10-01 | 博众精工科技股份有限公司 | Air tightness detection device |
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2019
- 2019-12-09 CN CN201911251357.6A patent/CN110793733A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465841A (en) * | 2021-06-30 | 2021-10-01 | 博众精工科技股份有限公司 | Air tightness detection device |
| CN113465841B (en) * | 2021-06-30 | 2024-04-12 | 博众精工科技股份有限公司 | Air tightness detection equipment |
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