CN211504561U - Multi-probe automatic leak detection system - Google Patents
Multi-probe automatic leak detection system Download PDFInfo
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- CN211504561U CN211504561U CN201922358020.7U CN201922358020U CN211504561U CN 211504561 U CN211504561 U CN 211504561U CN 201922358020 U CN201922358020 U CN 201922358020U CN 211504561 U CN211504561 U CN 211504561U
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Abstract
The utility model relates to an automatic leak hunting system of many probes, including control platform, connect a plurality of arms on it and install the leak hunting device that constitutes at arm end, by straw and gas sensor, leak hunting device and arm pass through rotary part and link to each other, are equipped with on the rotary part and rotate the piece, are equipped with infrared distance measuring sensor on the rotation piece, link to each other through the aviation plug connector between gas sensor and the rotation piece, and the wire of connecting on each sensor and the rotation piece links to each other through arm and control platform respectively. The control platform controls the mechanical arm to drive the suction pipe to reach a set position according to the setting by combining the measured value of the infrared distance measuring sensor, and once the signal peak value sensed by the gas sensor is greater than the leak point threshold value, the control platform gives an alarm. The utility model discloses use gas as the tracer medium, can detect a plurality of positions of a plurality of work pieces or work pieces simultaneously, the testing process is full automation, and labour saving and time saving improves the accuracy of leak hunting efficiency and leak hunting.
Description
Technical Field
The utility model relates to a leak hunting equipment especially relates to an automatic leak hunting system of many probes.
Background
The leakage detection technology is gradually widely applied in the fields of vacuum devices, food packaging, aerospace, nuclear fusion and the like, and becomes a high and new technology in the 21 st century. With the development of science and technology, the performance of many precision devices has a great relationship with the sealing performance of the devices, and a tiny leak hole can cause huge economic loss.
The basic principle of leak detection is that a leak indicating medium, which can be gas or liquid, is injected into one side of a leak hole, the leak indicating medium enters the other side through the leak hole under the action of pressure difference or concentration difference, and whether the leak hole exists or not and the size of the leak hole can be judged by detecting whether the leak indicating medium on the other side exists or not and the concentration of the leak indicating medium on the other side. The leak detection method is divided into gas detection and water detection according to a leak indicating medium, and the precision of the gas detection is far higher than that of the water detection due to the characteristics of the volume and the dissipation of gas, so that the leak detection method is more and more widely applied to modern industries.
However, the current leak detection mainly adopts manual operation to detect, in the automatic assembly line production process, the detection method needs a great deal of time and labor, and meanwhile, the detection precision and accuracy are also reduced due to human factors when the leak detection of complex workpieces is dealt with.
Disclosure of Invention
The utility model discloses mainly in order to solve above-mentioned technical problem, provide an automatic leak hunting system of many probes, use gas as the tracer medium, can detect a plurality of positions of a plurality of work pieces or work pieces simultaneously, the testing process is full automatic, reduces the human cost, and convenient operation has greatly improved the accuracy of leak hunting efficiency and leak hunting.
The above technical problem of the present invention can be solved by the following technical solutions: the utility model discloses a leak hunting device, arm and control platform are connected with a plurality ofly on the control platform the arm, the arm end of arm is equipped with leak hunting device, leak hunting device is including straw and the gas sensor that links to each other, gas sensor's sensing signal output end warp the arm with control platform link to each other. The control platform can control the telescopic distance and the angle of the mechanical arm, so that the moving suction pipe is set to scan on the surface of a workpiece to be detected, and the gas sensor senses whether gas leakage occurs in the scanned place, and leakage detection of the workpiece is achieved. Through a plurality of arms for each leak hunting device can carry out the leak hunting to a plurality of work pieces or the different regions of work piece simultaneously, improves work efficiency. Carry the straw automatic scanning with the arm, detection distance and the detection speed that can accurate control straw have not only replaced manual operation, and labour saving and time saving adopts gas sensor moreover, has improved leak hunting system's sensitivity and detection precision.
As preferred, the leak hunting device with the arm pass through rotary part and link to each other, but be equipped with 90 degrees pivoted rotation parts on the rotary part, be equipped with on the rotation part with the directional unanimous infrared distance measuring sensor of straw, gas sensor and rotate and link to each other through aviation plug connector between, the control end of rotating, infrared distance measuring sensor's output respectively the warp the arm with control platform link to each other. Controlled by the control platform, the rotating part can rotate 360 degrees in the plane, and the distance and the angle between the suction pipe and the surface of the workpiece can be conveniently controlled by arranging the motor and the bearing. When the suction pipe detects that air leakage exists on the surface of the workpiece, the rotating piece rotates by 90 degrees to drive the suction pipe to leave the surface of the workpiece, and meanwhile, the control platform records a leakage point. After 5 seconds, the rotor rotates 90 degrees and the pipette continues to scan. The rotating part can be realized by arranging a motor, a bearing and the like. The infrared distance measuring sensor is used for detecting the distance of the surface of the workpiece and transmitting the distance information to the control platform, so that the control platform can control the suction pipe to reach a set position conveniently. Adopt aviation plug connector installation to connect gas sensor, be convenient for according to the detection threshold value demand, change gas sensor to be applicable to the demand of different detection precision, detection range, it is more convenient and nimble to use.
Preferably, the sensitive layer of the gas sensor is a palladium alloy layer, the sensitive layer is loaded on the porous alumina ceramic substrate, the heating element is arranged around the sensitive layer, and the signal electrode for outputting a sensing signal is arranged on the sensitive layer. The suction pipe is in threaded connection with the gas sensor, a dust filter is arranged in the suction pipe, and the dust filter is close to the threaded connection. The suction pipe connected with the threads is convenient to disassemble, assemble and clean, and the dust filter disc is used for filtering dust in the detection environment. The sensitive layer is a palladium alloy layer, can adsorb hydrogen and has good selectivity and response capability on the hydrogen. The heating element enables the sensitive layer to work at 300-350 ℃, and the reliability of detection is improved. The gas sensor is used for measuring the concentration of the leakage point on the surface of the workpiece, judging whether the leakage point exists on the surface of the workpiece or not and determining the size of the leakage point according to the induction concentration.
Preferably, the mechanical arm comprises a plurality of sections of linkage assemblies which are sequentially connected, adjacent linkage assemblies are connected through a rotating part, the linkage assembly at the front section is connected with the leakage detection device through the rotating part, and the linkage assembly at the last section is connected with the control platform through the rotating part. Controlled by the control platform, the rotating component can rotate 360 degrees in the plane, so that the extending angle of each linkage component can be adjusted. The utility model discloses as required, can be through the number that increases the arm, perhaps increase the number of interlock subassembly on the arm to increase or enlarge the detection area who leaks the device.
Preferably, the linkage assembly comprises a driving rod and two groups of connecting rod assemblies symmetrically arranged on two sides of the driving rod, each connecting rod assembly comprises a first connecting rod and a second connecting rod which are hinged, and two ends of each connecting rod assembly are respectively and rotatably connected with two ends of the driving rod. The actuating lever is controlled by the control platform to be scalable, drives articulated first connecting rod and second connecting rod and expandes or fold to control the flexible of whole link assembly, make the flexible distance adjustable range of straw bigger, improve flexible stability simultaneously. The driving rod controlled by the control platform can be realized by arranging a motor and a screw rod.
Preferably, the control platform comprises a central processing unit, a man-machine interaction unit, a signal processing unit, a storage unit and a motion control unit, the man-machine interaction unit, the signal processing unit, the storage unit and the motion control unit are respectively connected with the central processing unit, the gas sensor is connected with the input end of the signal processing unit, and the mechanical arm is connected with the output end of the motion control unit. The human-computer interaction unit is used for receiving instructions of operators and setting detection parameters including alarm threshold values, detection rates and moving tracks of the mechanical arms. The signal processing unit is connected with the gas sensor through a signal wire and used for receiving a sensing signal output by the gas sensor, filtering, amplifying and denoising the sensing signal, reading a signal peak value record, converting the signal into a digital signal and transmitting the digital signal to the central processing unit; the signal processing unit is also connected with the infrared distance measuring sensor on the mechanical arm through a signal line, receives a sensing signal of the infrared distance measuring sensor and transmits the distance measuring signal to the central processing unit. The motion control unit mainly controls the movement of the mechanical arm, the angle and the distance between the mechanical arm and the workpiece are adjusted by controlling the rotation of the rotating part and the extension of the driving rod, the moving speed of the mechanical arm is controlled, and a certain distance and a certain vertical angle between a suction pipe at the front end of the mechanical arm and the workpiece are guaranteed. The storage unit is used for receiving the data sent by the central processing unit, storing the measurement result and recording the detection time and the measured value of the missing point.
The utility model has the advantages that: the adoption of a plurality of leak detection devices can detect a plurality of workpieces simultaneously or detect a plurality of regions of the workpieces simultaneously, greatly improves the detection efficiency, and is suitable for workpiece detection in complex shapes because the angle and the distance of the mechanical arm are adjustable. Carry the straw automatic scanning with the arm, detection distance and the detection speed that can accurate control straw have not only replaced manual operation, and labour saving and time saving adopts gas sensor moreover, has improved leak hunting system's sensitivity and detection precision. The whole leakage detection system is integrally controlled, has the function of automatic operation, and is suitable for air tightness detection in the industrial production process.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the leak detection device of the present invention.
Fig. 3 is a block diagram of a circuit principle connection structure of the middle control platform of the present invention.
In the figure, 1 is a leakage detection device, 2 is a control platform, 3 is a suction pipe, 4 is a gas sensor, 5 is a rotating part, 6 is a rotating part, 7 is an infrared distance measuring sensor, 8 is an aviation plug connector, 9 is a driving rod, 10 is a first connecting rod, 11 is a second connecting rod, 21 is a central processing unit, 22 is a man-machine interaction unit, 23 is a signal processing unit, 24 is a storage unit, and 25 is a motion control unit.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example (b): the automatic leak detection system with multiple probes of this embodiment is shown in fig. 1, and includes leak detection device 1, mechanical arms and control platform 2, and the control platform is connected with four mechanical arms, and the leak detection device is installed to the arm end of mechanical arm. The leakage detection device comprises a suction pipe 3 and an air-sensitive sensor 4 which are connected, as shown in figure 2, the suction pipe is 5cm long, the front end of the suction pipe is a suction end, the rear end of the suction pipe is in threaded connection with the air-sensitive sensor, a dust filter is arranged in the suction pipe, and the dust filter is close to the rear end of the suction pipe and used for filtering dust in a detection environment. The gas sensor comprises a shell and a sensitive layer arranged in the shell, wherein the sensitive layer is a palladium alloy layer, can adsorb hydrogen and has good selectivity and response capability on the hydrogen, the thickness of the sensitive layer is 10-50 mu m, the sensitive layer is loaded on a porous alumina ceramic substrate, heating elements are arranged around the sensitive layer, the sensitive layer is enabled to work at the temperature of 300-350 ℃, and a signal electrode for outputting a sensing signal is led out of the sensitive layer. The gas sensor is used for measuring the concentration of the leakage point on the surface of the workpiece, judging whether the leakage point exists on the surface of the workpiece or not and determining the size of the leakage point according to the induction concentration. As shown in figure 1, leak detection device and arm pass through rotary part 5 and link to each other, but be equipped with one on the rotary part 90 degrees pivoted and rotate piece 6, be equipped with on the rotation piece with the directional unanimous infrared distance measuring sensor 7 of straw, link to each other through aviation plug connector 8 between gas sensor and the rotation piece, the wire of connecting on the signal electrode is connected to aviation plug connector, link to each other through arm and control platform again, the control end of rotating the piece, infrared distance measuring sensor's output links to each other through arm and control platform respectively.
As shown in fig. 1, in this embodiment, the mechanical arm includes two linked assemblies, the linked assemblies are connected through a rotating component 5, the rotating component can rotate 360 degrees to adjust the direction of the linked assemblies, the linked assembly at the front end is connected with the leak detection device through the rotating component, and the linked assembly at the last end is connected with the control platform through the rotating component. Each linkage assembly comprises a driving rod 9 and two groups of linkage assemblies symmetrically arranged on two sides of the driving rod, each linkage assembly comprises a first connecting rod 10 and a second connecting rod 11 which are hinged, each first connecting rod is shorter than each second connecting rod, and two ends of each linkage assembly are respectively connected with two ends of the driving rod in a rotating mode. The driving rod is controlled by the control platform to be telescopic and drives the first connecting rod and the second connecting rod which are hinged to be unfolded or folded, so that the telescopic of the whole connecting rod assembly is controlled. The two sections of connecting rod assemblies can stretch out and draw back, so that the adjustable range of the telescopic distance of the suction pipe is larger.
The control platform is used for controlling the movement of the mechanical arm, further controlling the leakage detection device to perform scanning detection on the surface of the workpiece, receiving a sensing signal of the gas sensor, and analyzing and processing the sensing signal to judge whether a leakage point exists or not and the size of the leakage point. As shown in fig. 3, the control platform 2 includes a central processing unit 21, a man-machine interaction unit 22, a signal processing unit 23, a storage unit 24 and a motion control unit 25, the man-machine interaction unit includes a display screen and a key, the man-machine interaction unit and the storage unit are respectively connected with the central processing unit, the gas sensor 4 and the sensing signal output end of the infrared distance measuring sensor 7 are respectively connected with the input end of the signal processing unit, the output end of the signal processing unit is connected with the input end of the central processing unit, the output end of the central processing unit is connected with the input end of the motion control unit, and the output end of the motion control unit is respectively connected with the control ends of the rotating part 6, the rotating part 5 and. The human-computer interaction unit is used for receiving instructions of operators and setting detection parameters including alarm threshold values, detection rates and moving tracks of the mechanical arms. The signal processing unit is connected with the gas sensor through a signal wire and used for receiving a sensing signal output by the gas sensor, filtering, amplifying and denoising the sensing signal, reading a signal peak value record, converting the signal into a digital signal and transmitting the digital signal to the central processing unit; the signal processing unit is also connected with the infrared distance measuring sensor on the mechanical arm through a signal line, receives a sensing signal of the infrared distance measuring sensor and transmits the distance measuring signal to the central processing unit. The motion control unit mainly controls the movement of the mechanical arm, the angle and the distance between the mechanical arm and the workpiece are adjusted by controlling the rotation of the rotating part and the extension of the driving rod, the moving speed of the mechanical arm is controlled, and a certain distance and a certain vertical angle between a suction pipe at the front end of the mechanical arm and the workpiece are guaranteed. The storage unit is used for receiving the data sent by the central processing unit, storing the measurement result and recording the detection time and the measured value of the missing point.
The working process is as follows: an operator sets a migration track, a migration speed and a leakage point threshold value of each mechanical arm through a human-computer interaction unit on a control platform respectively, the control platform controls each mechanical arm to move to the position above the surface of a workpiece to be detected according to a set value respectively, an infrared distance measuring sensor on the leakage detection device detects the distance between a suction pipe and the surface of the workpiece in real time and transmits distance information to an information processing unit, the distance information is processed by the information processing unit and then transmitted to a central processing unit, the central processing unit sends a control signal to a motion control unit according to the obtained distance information, and the motion control unit controls the mechanical arms to move or rotate until the suction pipe reaches the set position; then, the gas sensor starts to detect, gas enters the gas sensor through a suction pipe, a sensing signal output by the gas sensor is transmitted to the central processing unit through the information processing unit, if the signal peak value is larger than the leakage point threshold value, the central processing unit sends out alarm prompt through a display screen or an alarm device, and controls a rotating piece on the leakage detection device for detecting the leakage point to rotate 90 degrees so as to be far away from the surface of the workpiece, and simultaneously records the measured value and the time of the point; and after waiting for 5 seconds, the control platform controls the rotating part of the mechanical arm to rotate 90 degrees, and adjusts the movable mechanical arm to continuously scan other positions on the surface of the workpiece. The mechanical arm scans in a fixed space on the surface of the workpiece at a certain speed, and each suction pipe can perform plane scanning on multiple dimensions of the workpiece and can also scan multiple areas on the same plane.
The utility model discloses a plurality of arms are connected with a plurality of leak hunting devices, can detect a plurality of work pieces simultaneously, perhaps detect a plurality of regions of work piece simultaneously, have greatly improved detection efficiency to because angle, the distance of arm are all adjustable, the event is applicable to the work piece detection of complicated shape. According to the needs, the utility model discloses can be through the number that increases the arm, perhaps increase the number of interlock subassembly on the arm to increase the detection area who leaks the device. The utility model discloses well adoption circular connector erection joint gas sensor is convenient for change gas sensor according to the detection threshold value demand to be applicable to the demand of different detection precision, detection range. The whole leakage detection system is integrally controlled, has the function of automatic operation, and is suitable for air tightness detection in the industrial production process.
Claims (6)
1. The utility model provides an automatic leak hunting system of many probes which characterized in that includes leak hunting device, arm and control platform, and control platform is last to be connected with a plurality ofly the arm, the arm end of arm is equipped with leak hunting device, leak hunting device is including the straw and the gas sensor that link to each other, gas sensor's sensing signal output end warp the arm with control platform link to each other.
2. The system of claim 1, wherein the leak detection device is connected to the robotic arm through a rotating member, the rotating member is provided with a rotating member that can rotate at 90 degrees, the rotating member is provided with an infrared distance measuring sensor that is consistent with the direction of the straw, the gas sensitive sensor is connected to the rotating member through an aerial connector, and a control end of the rotating member and an output end of the infrared distance measuring sensor are respectively connected to the control platform through the robotic arm.
3. The multi-probe automatic leak detection system according to claim 1, wherein the sensitive layer of the gas sensor is a palladium alloy layer, the sensitive layer is loaded on a porous alumina ceramic substrate, a heating element is arranged around the sensitive layer, and a signal electrode for outputting a sensing signal is arranged on the sensitive layer.
4. The system of claim 1, wherein the robotic arm comprises a plurality of sequentially connected linkage assemblies, adjacent linkage assemblies are connected through a rotating member, the linkage assembly at the front end is connected with the leak detection device through a rotating member, and the linkage assembly at the last end is connected with the control platform through a rotating member.
5. The multi-probe automatic leak detection system according to claim 4, wherein the linkage assembly comprises a driving rod and two groups of linkage assemblies symmetrically arranged on two sides of the driving rod, each linkage assembly comprises a first connecting rod and a second connecting rod which are hinged, and two ends of each linkage assembly are respectively and rotatably connected with two ends of the driving rod.
6. The multi-probe automatic leak detection system according to claim 1, 2 or 4, wherein the control platform comprises a central processing unit, a human-computer interaction unit, a signal processing unit, a storage unit and a motion control unit, the human-computer interaction unit, the signal processing unit, the storage unit and the motion control unit are respectively connected with the central processing unit, the gas sensor is connected with the input end of the signal processing unit, and the mechanical arm is connected with the output end of the motion control unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579168A (en) * | 2019-12-24 | 2020-08-25 | 杭州超钜科技有限公司 | Multi-probe automatic leak detection system and leak detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579168A (en) * | 2019-12-24 | 2020-08-25 | 杭州超钜科技有限公司 | Multi-probe automatic leak detection system and leak detection method |
| CN111579168B (en) * | 2019-12-24 | 2022-07-29 | 杭州超钜科技有限公司 | Multi-probe automatic leak detection system and leak detection method |
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