CN114544117B

CN114544117B - Detection device, detection method thereof and production equipment

Info

Publication number: CN114544117B
Application number: CN202210245966.6A
Authority: CN
Inventors: 雷奋星; 梁峰
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2023-10-27
Anticipated expiration: 2042-03-14
Also published as: CN114544117A

Abstract

The application discloses a detection device, a detection method and production equipment thereof, relates to the field of tightness detection, and aims to solve the problem that the detection device and the detection method in the related art cannot be suitable for tightness detection of mass-produced electronic products. The detecting device is used for detecting the tightness of the detected part; the tested part comprises a part body and a sealing body, wherein the part body is provided with a gap communicated with the first side and the second side, and the sealing body is arranged in the gap; the detection device comprises an electrostatic generator, a detection unit and a processing device, wherein the electrostatic generator comprises a first electrode, the first electrode is arranged on the first side and can form a preset electric field with a second electrode arranged on the second side; the detection unit is used for detecting whether the medium is broken down by the preset electric field; the processing device is used for determining the tightness of the tested part according to whether the medium is broken down by the preset electric field. The application can be used for detecting the tightness of equipment.

Description

Detection device, detection method thereof and production equipment

Technical Field

The application relates to the technical field of tightness detection, in particular to a detection device, a detection method and production equipment thereof.

Background

In electronic products such as mobile phones and tablet computers, a sealing body is generally required to seal a gap on a shell of the electronic products, for example, a gap between a cover plate on the outer side of a mobile phone screen and a mobile phone frame is required to be sealed by using hot melt adhesive and the like. The tightness of the gap directly affects the operation of the electronic product, so that the tightness of the gap is usually detected in the production process of the electronic product, so that a product with poor tightness can be found in time. Among them, how to detect the tightness of the gap of the electronic product is an important subject.

In the related art, the shell of the electronic product is sliced to obtain the section of the gap, and then the tightness of the sealing body in the gap is observed under a microscope.

Disclosure of Invention

The embodiment of the application provides a detection device, a detection method and production equipment thereof, which are used for solving the problem that the detection device and the detection method in the related technology cannot be suitable for the tightness detection of mass-produced electronic products.

The embodiment of the application adopts the following technical scheme:

in a first aspect, an embodiment of the present application provides a detection apparatus for detecting tightness of a part to be detected; the tested part comprises a part body and a sealing body, wherein the part body is provided with a first side, a second side and a gap communicated with the first side and the second side, the sealing body is arranged in the gap, and the breakdown strength of the sealing body is smaller than that of the part body; the detection device comprises an electrostatic generator, a detection unit and a processing device, wherein the electrostatic generator comprises a first electrode, the first electrode is arranged on the first side and can form a preset electric field acting on a medium in the gap with a second electrode arranged on the second side; the medium comprises the sealing body or the medium comprises air and the sealing body; the detection unit is used for detecting whether the medium is broken down by the preset electric field; the processing device is used for determining the tightness of the tested part according to whether the medium is broken down by the preset electric field.

By adopting the technical scheme, the detecting unit can determine whether the gap tightness is good or not by detecting whether the medium in the gap is broken down by a preset electric field or not, so that the detected part with poor tightness can be detected, and the problems of water inlet oxygen, dust and the like in the using process are avoided to influence the normal operation of the detected part; the detection device is simple in tightness detection process, does not need to damage the detected part before detection, and can be well suitable for tightness detection of the detected part in mass production.

In some embodiments, the processing device is specifically configured to: if the medium is broken down by the preset electric field, determining that the tightness of the tested part is unqualified; and if the medium is not broken down by the preset electric field, determining that the tightness of the tested part is qualified.

By adopting the technical scheme, the processing device divides the tightness of the tested part into two stages of pass and fail by whether the medium is broken down by the preset electric field, thereby being beneficial to reducing the workload of the processing device and improving the working efficiency of the processing device.

In some embodiments, the electrostatic generator is configured to apply the preset electric field to the medium at a plurality of detection positions on the part under test, respectively; the processing device is used for: if the mediums at the detection positions are not broken down by the preset electric field, determining that the tightness of the detected part is qualified; and if at least one medium at the detection position is broken down by the preset electric field, determining that the tightness of the tested part is unqualified.

By adopting the technical scheme, the processing device can judge the tightness of the tested part more accurately.

In some embodiments, the detection unit is configured to detect an electrical parameter value in the electrostatic generator that is used to characterize whether the medium is broken down by the preset electric field; the processing device is used for determining whether the medium is broken down by the preset electric field according to the magnitude of the electric parameter value.

By adopting the technical scheme, the concentration of carriers in the medium (namely the dielectric insulation) is quantitatively reflected by the magnitude of the electrical parameter value, so that the processing device can accurately determine the tightness of the tested part.

In some embodiments, the processing device is specifically configured to: if the maximum value of the electrical parameter value is in a preset interval, determining that the medium is broken down by the preset electric field; and if the maximum value of the electrical parameter value is outside the preset interval, determining that the medium is not broken down by the preset electric field.

By adopting the technical scheme, the accuracy of determining whether the medium is broken down by the preset electric field or not by the processing device is improved.

In some embodiments, the electrostatic generator comprises a discharge source, a discharge line connected between the discharge source and the first electrode, and a ground line for grounding, the ground line for connecting the discharge source and the second electrode; the electrical parameter values include current values on at least one of the discharge line, the ground line, and the first electrode.

Through adopting above-mentioned technical scheme, the magnitude of the current value on the first electrode can reflect the concentration of carrier in the medium in the clearance more directly perceivedly to whether the leakproofness of the measured part is good is convenient to confirm.

In some embodiments, the first electrode is a rod-shaped electrode and the detection unit is a current clamp; the current clamp is clamped on at least one of the first electrode, the discharge circuit and the grounding circuit.

By adopting the technical scheme, the detection unit can be conveniently installed.

In some embodiments, the static electricity generator includes a control switch disposed on the discharge line; the processing device is connected with the control switch and used for controlling the on and off of the control switch.

By adopting the technical scheme, the processing device can control the generation of the preset electric field by controlling the control switch, so that the gap tightness detection by the detection device is facilitated.

In some embodiments, the processing device is configured to: determining a first number, and a total number of the tested components subjected to tightness detection; then determining a first ratio according to the relation between the first ratio and the total number and the first number; wherein the first number is the number of the tested components with qualified tightness, and the first ratio is the qualified tightness rate; alternatively, the first number is the number of the tested parts that fail in sealability, and the first ratio is the rate of fail in sealability.

By adopting the technical scheme, the manual work is saved to calculate the leak tightness qualification rate or the leak tightness disqualification rate, thereby being beneficial to reducing the labor cost.

In some embodiments, the detection device further comprises a first counter; the processing device is used for: and sending a pulse signal to the first counter after the leak tightness of the tested part is determined to be qualified or after the leak tightness of the tested part is determined to be unqualified. The first counter is used for recording the number of the pulse signals. The processing device is also used for: the number of pulse signals is acquired, and then the first number is determined according to the relation between the first number and the number of pulse signals.

By adopting the technical scheme, the first number confirmed by the processing device can be more accurate, and large deviation is not easy to occur.

In some embodiments, the processing device is configured to send a pulse control signal to the electrostatic generator to cause the electrostatic generator to apply the preset electric field to the medium of the part under test. The detection device further comprises a second counter for recording the number of pulse control signals. The processing device is also used for: the number of pulse control signals is obtained, and then the total number is determined according to the relation between the total number and the number of pulse control signals.

By adopting the technical scheme, the total number confirmed by the processing device can be more accurate, and large deviation is not easy to occur.

In some embodiments, the electrostatic generator is configured to apply the preset electric field to the medium at a plurality of detection positions on the part under test, respectively; the processing device is used for: and determining the total number according to the relation between the total number and the number of the pulse control signals and the number of the detection positions.

By adopting the technical scheme, when a plurality of detection positions are arranged on the detected part, the total number confirmed by the processing device is more accurate, and large deviation is not easy to occur.

In some embodiments, the first electrode is a rod-shaped electrode and has a discharge end with a pointed shape, and the discharge end is used for forming the preset electric field with the second electrode.

By adopting the technical scheme, the position of the first electrode can be accurately determined, so that the position of the medium in the gap acted by the preset electric field can be accurately determined, and the tightness detection can be accurately carried out on a certain position of the gap.

In some embodiments, the detection device further comprises a robotic arm to which the first electrode is coupled.

By adopting the technical scheme, the mechanical arm can drive the first electrode to move to detect the tightness of the clearance of the tested part, so that the automation level of the detection device is improved.

In some embodiments, the processing device is configured to control a motion profile of the robotic arm.

By adopting the technical scheme, the processing device can drive the manual work to control the motion track of the mechanical arm, so that the automation level of the detection device can be further improved.

In some embodiments, the electrostatic generator comprises the second electrode; the detection device further comprises a clamp, a positioning part used for positioning the tested part is arranged on the clamp, and the second electrode is arranged on the clamp and is fixed relative to the positioning part.

By adopting the technical scheme, the relative position between the measured part and the second electrode can be fixed, so that a preset electric field can accurately act on a certain position of the gap to detect the tightness of the gap at the position.

In some embodiments, the component body comprises an insulating frame, and an insulating cover plate arranged in the insulating frame, the insulating cover plate and the insulating frame enclose a shell, and the gap is formed between the edge of the insulating cover plate and the insulating frame; the first side is the outer side of the shell, and the second side is the inner side of the shell; the positioning part is a positioning ring groove matched with the insulating frame, and the second electrode is arranged in an area surrounded by the positioning ring groove.

Through adopting above-mentioned technical scheme, can be better with the measured part location, still make the structure of location portion simpler moreover, be favorable to reducing the cost of anchor clamps.

In some embodiments, the second electrode is a plate electrode, and an edge of the second electrode is located at a notch of the positioning ring groove.

By adopting the above technical scheme, when detecting the tightness of the circumference of the annular gap, the second electrode can detect the tightness of the circumference of the annular gap without changing the position and moving the first electrode.

In some embodiments, the second electrode is a ring-shaped electrode, and an outer edge of the second electrode is located at a notch of the positioning ring groove.

In some embodiments, the second electrode is a strip electrode, the second electrode is located at a notch of the positioning ring groove and extends along an extending direction of the positioning ring groove.

By adopting the technical scheme, the detection device is suitable for detecting the tightness of the strip-shaped gap in the detected part or detecting the tightness of a part of the annular gap.

In some embodiments, a portion of the second electrode is embedded in the fixture.

By adopting the technical scheme, the stability of the second electrode on the clamp can be improved.

In some embodiments, the component under test includes the second electrode, and the component body includes an insulating frame and an insulating cover plate; the second electrode is connected with the insulating frame to form a shell with an opening with the insulating frame, the insulating cover plate is arranged at the opening, and the gap is formed between the edge of the insulating cover plate and the insulating frame; the first side is an outside of the housing.

By adopting the technical scheme, the second electrode does not need to be arranged independently, so that the structure of the detection device is simplified, and the cost of the detection device is reduced.

In a second aspect, an embodiment of the present application provides a production apparatus, including a workbench, and the detection device described in the first aspect; the workbench is used for placing the tested part.

The production equipment has the same advantages as the detection device described in the first aspect, and will not be described in detail herein.

In a third aspect, an embodiment of the present application provides a detection method of a detection device for detecting tightness of a part to be detected; the tested part comprises a part body and a sealing body, wherein the part body is provided with a first side, a second side and a gap communicated with the first side and the second side, the sealing body is arranged in the gap, and the breakdown strength of the sealing body is smaller than that of the part body; the detection device comprises an electrostatic generator, wherein the electrostatic generator comprises a first electrode, and the first electrode is used for being arranged on the first side and can form a preset electric field acting on a medium in the gap with a second electrode arranged on the second side; the medium comprises the sealing body or the medium comprises air and the sealing body; the detection method of the detection device comprises the following steps: controlling the first electrode and the second electrode to generate the preset electric field; detecting whether the medium is broken down by the preset electric field; and determining the tightness of the tested part according to whether the medium is broken down by the preset electric field.

The detection method of the detection device has the same advantages as those of the detection device described in the first aspect, and will not be described in detail herein.

In some embodiments, determining the tightness of the tested component according to whether the medium is broken down by the preset electric field comprises: if the medium is broken down by the preset electric field, determining that the tightness of the tested part is unqualified; if the medium is not broken down by the preset electric field, determining that the tightness of the tested part is qualified.

By adopting the technical scheme, whether the medium is broken down by the preset electric field or not is determined as two stages of pass and fail of the tightness of the tested part, so that the workload of the detection device is reduced, and the working efficiency of the detection device is improved.

In some embodiments, the static generator applies a preset electric field to the medium, comprising: the static generator applies the preset electric fields to the medium at a plurality of detection positions on the detected part respectively. Determining the tightness of the tested component according to whether the medium is broken down by the preset electric field, wherein the method comprises the following steps: if the mediums at the detection positions are not broken down by the preset electric field, determining that the tightness of the detected part is qualified; and if at least one medium at the detection position is broken down by the preset electric field, determining that the tightness of the tested part is unqualified.

By adopting the technical scheme, the tightness of the tested part can be judged more accurately.

In some embodiments, detecting whether the medium is broken down by the preset electric field comprises: detecting an electrical parameter value in the electrostatic generator, wherein the electrical parameter value is used for representing whether the medium is broken down by the preset electric field; after detecting the electrical parameter value, the detection method of the detection device further includes: and determining whether the medium is broken down by the preset electric field according to the magnitude of the electric parameter value.

By adopting the technical scheme, the detection device can more accurately determine whether the medium is broken down by the preset electric field.

In some embodiments, determining whether the medium is broken down by the predetermined electric field according to the magnitude of the electrical parameter value includes: when the maximum value of the electrical parameter value is within a preset interval, determining that the medium is broken down by the preset electric field; and when the maximum value of the electrical parameter value is outside the preset interval, determining that the medium is not broken down by the preset electric field.

By adopting the technical scheme, the accuracy of determining whether the medium is broken down by the preset electric field can be improved.

In some embodiments, the electrostatic generator includes a discharge source, a discharge line connected between the discharge source and the first electrode, and a ground line for connecting the discharge source and the second electrode; the electrical parameter values include current values on at least one of the discharge line, the ground line, and the first electrode.

By adopting the technical scheme, the sample can more intuitively and accurately reflect the insulation performance of the medium in the gap, thereby conveniently determining whether the tightness of the measured part is good.

In some embodiments, a first number, and a total number of the tested components that have undergone a leak test, is determined; determining a first ratio according to the relation between the first ratio and the total number and the first number; wherein the first number is the number of the tested components with qualified tightness, and the first ratio is the qualified tightness rate; alternatively, the first number is the number of the tested parts that fail in sealability, and the first ratio is the rate of fail in sealability.

By adopting the technical scheme, the manual work is saved to calculate the leak tightness qualification rate or the leak tightness disqualification rate, and the labor cost is reduced.

In some embodiments, determining the first number comprises: sending out a pulse signal after determining that the tightness of the tested part is qualified or after determining that the tightness of the tested part is unqualified; acquiring the number of the pulse signals; the first number is determined according to a relationship between the first number and the number of pulse signals.

By adopting the technical scheme, the first number is more accurate, and large deviation is not easy to occur.

In some embodiments, the static generator applies a preset electric field to the medium, comprising: and sending a pulse control signal to the static generator so that the static generator applies the preset electric field to the medium. Determining the total number includes: acquiring the number of the pulse control signals; the total number is determined according to the relationship between the total number and the number of the pulse control signals.

By adopting the technical scheme, the total number can be more accurate, and large deviation is not easy to occur.

In some embodiments, the static generator applies a preset electric field to the medium, comprising: the static generator applies the preset electric fields to the medium at a plurality of detection positions on the detected part respectively. Determining the total number from a relationship of the total number to the number of pulse control signals, comprising: and determining the total number according to the relation between the total number and the number of the pulse control signals and the number of the detection positions.

By adopting the technical scheme, when a plurality of detection positions are arranged on the detected part, the total number can be more accurate, and large deviation is not easy to occur.

Drawings

FIG. 1 is a schematic diagram of a detection device according to some embodiments of the present application;

FIG. 2 is a schematic diagram of the relationship between the electrostatic generator and the detection unit in some embodiments of the present application;

FIG. 3 is a schematic diagram showing the relationship between the electrostatic generator and the detecting unit in other embodiments of the present application;

FIG. 4 is a schematic diagram showing the relationship between the electrostatic generator and the detecting unit in other embodiments of the present application;

FIG. 5 is a schematic diagram of a detection device according to some embodiments of the application;

FIG. 6 is a schematic diagram showing a relationship between a processing device and control switches of a detection unit, a mechanical arm and an electrostatic generator according to some embodiments of the present application;

FIG. 7 is a cross-sectional view of section A-A of FIG. 1;

FIG. 8 is a transverse cross-sectional view of a clamp in some embodiments of the application;

FIG. 9a is a transverse cross-sectional view of a clamp in further embodiments of the application;

FIG. 9b is a schematic diagram illustrating a detected position of a gap of a part under test according to some embodiments of the present application;

FIG. 10 is a schematic diagram of a detecting device according to other embodiments of the present application;

FIG. 11 is a schematic illustration of a cross-sectional shape of a gap in a part under test in some embodiments of the application;

FIG. 12 is a flow chart of a detection method of a detection device according to some embodiments of the present application;

FIG. 13 is a flow chart of a method of detecting a dielectric breakdown by a predetermined electric field according to some embodiments of the present application;

FIG. 14 is a flow chart of a method for determining leak tightness qualification in some embodiments of the application;

FIG. 15 is a flowchart of a first number determination method according to some embodiments of the present application;

FIG. 16 is a flowchart illustrating a first number determination method according to some embodiments of the present application.

Detailed Description

In embodiments of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the embodiments of the present application, it should be noted that the term "electrically connected" should be understood in a broad sense, for example, current conduction may be achieved by direct connection, or electrical energy conduction may be achieved by capacitive coupling.

In the detection device provided by the embodiment of the application, the tightness of the detected part is determined by applying an electric field to the sealed position of the detected part and then detecting whether the structure at the sealed position is broken down by the electric field.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a detection device according to some embodiments of the application. The detecting means is for detecting the tightness of the part 300 under test. The part 300 to be tested includes a part body 310 and a sealing body 320, the part body 310 having a first side (a side shown in fig. 1), a second side (b side shown in fig. 1), and a gap 311 communicating the first side and the second side, the sealing body 320 being provided in the gap 311.

The tested component 300 may be not only an electronic device such as a mobile phone, a tablet computer, a smart watch, or other devices with a gap sealing structure. The component body 310 may be made of a material having breakdown strength, such as an insulating material, a semiconductor material, or a composite material, and may be specific according to the actual situation. The sealing body 320 may be a sealant, a sealing ring, or the like, and may be specific according to the actual situation.

The detection device comprises an electrostatic generator 1, a detection unit 2 and a processing device 3, the electrostatic generator 1 comprises a first electrode 11, the first electrode 11 is arranged on a first side, and a preset electric field acting on a medium 330 in a gap 311 can be formed by the first electrode 11 and a second electrode 12 arranged on a second side. Wherein the medium 330 includes the sealing body 320, or the medium 330 includes the air 340 and the sealing body 320.

As shown in fig. 1, for example, the first electrode 11 and the second electrode 12 are disposed at the position of the gap 311, so that the preset electric field can be ensured to act on the medium 330 in the gap 311 accurately.

The detecting unit 2 is configured to detect whether the medium 330 in the gap 311 is broken down by a preset electric field. The processing device 3 is configured to determine the tightness of the tested component 300 according to whether the medium 330 is broken down by a preset electric field. The processing device 3 may be a computer device or may be another device including an arithmetic circuit.

In the detection device according to the embodiment of the present application, the first electrode 11 is disposed on the first side of the component body 310, and the second electrode 12 is disposed on the second side of the component body 310, so that a preset electric field acting on the medium 330 in the gap 311 can be formed between the first electrode 11 and the second electrode 12, and if the gap 311 has poor tightness, for example, a hole or a crack exists in the sealing body 320 itself, or a gap exists between the sealing body 320 and the inner wall of the gap 311, the insulation of the medium 330 in the gap 311 is degraded, and the medium 330 in the gap 311 is easily broken down by the preset electric field under the action of the preset electric field; if the sealing property of the gap 311 is good, the dielectric 330 in the gap 311 has good insulation property, and the dielectric 330 in the gap 311 is hardly broken down by the predetermined electric field under the action of the predetermined electric field. Therefore, the detecting unit 2 detects whether the medium 330 in the gap 311 is broken down by the preset electric field, and the processing device 3 can determine whether the sealing performance of the gap 311 is good according to whether the medium 330 is broken down by the preset electric field, so that the detected component 300 with poor sealing performance can be detected, and the problems of water inlet oxygen, dust and the like in the using process are avoided from affecting the normal operation of the detected component 300.

The detection device is simple in tightness detection process, does not need to damage the detected part 300 before detection, and can be well suitable for tightness detection of the detected part 300 in mass production.

It should be noted that: in the tested part 300, the breakdown strength of the sealing body 320 is smaller than that of the part body 310, that is: the sealing body 320 is more likely to be broken than the component body 310 because the predetermined electric field acts on the component body 310 around the gap 311 while also acting on the medium 330 of the gap 311, and if the component body 310 is more likely to be broken than the sealing body 320, the medium 330 in the gap 311 is erroneously judged to be broken when the component body 310 is broken, thereby affecting the judgment of the quality of the sealing property. When the medium 330 is broken down by the preset electric field, a discharge arc will appear at two ends of the gap 311, specifically, as shown in fig. 1, a discharge arc m will appear between the first electrode 11 and the gap 311, and a discharge arc n will appear between the second electrode 12 and the gap 311.

In order to facilitate the explanation of the detection principle of whether the medium 330 in the gap 311 is broken down by the preset electric field, the following describes the electrostatic generator 1 and other hardware structures of the detection device in the embodiment of the present application: in some embodiments, as shown in fig. 1 and 2, fig. 2 is a schematic diagram of the relationship between the electrostatic generator 1 and the detection unit 2 in some embodiments of the present application. The electrostatic generator 1 comprises a discharge source 13, a discharge line 14 connected between the discharge source 13 and the first electrode 11, and a ground line 15 for grounding, the ground line 15 being for connecting the discharge source 13 and the second electrode 12. In this way, the discharge source 13 applies a voltage between the first electrode 11 and the second electrode 12, so that a preset electric field is generated between the first electrode 11 and the second electrode 12, and the magnitude of the preset electric field can be controlled by controlling the magnitude of the output voltage of the discharge source 13, so that the device can be suitable for detecting the tightness of the tested components 300 of different types.

It will be appreciated that the strength of the preset electric field should be smaller than the breakdown strength of the component body 310, that is, the strength of the preset electric field should not be too large, if the strength of the preset electric field is too large, the medium 330 in the gap 311 and the component body 310 near the gap 311 are broken down at the same time, which also affects the accuracy of the tightness detection of the tested component 300.

The grounding circuit 15 is different from the manner of grounding the discharge source 13 and the second electrode 12, for example, as shown in fig. 1, the grounding circuit 15 includes a first sub-ground wire 151 and a second sub-ground wire 152, one end of the first sub-ground wire 151 is connected to the discharge source 13, and the other end of the first sub-ground wire 151 is grounded; one end of the second sub ground line 152 is connected to the second electrode 12, and the other end of the second sub ground line 152 is connected to the first sub ground line 151. In addition to this grounding mode, the first sub ground line 151 and the second sub ground line 152 may be individually grounded, that is: one end of the second sub ground line 152 shown in fig. 1 is disconnected from the first sub ground line 151 and grounded.

In some embodiments, as shown in fig. 2, the electrostatic generator 1 further includes a control switch 16, and the control switch 16 is disposed on the discharge line 14. The on/off of the discharge line 14 can be controlled by controlling the on/off of the switch 16, so that the generation of the preset electric field can be controlled, thereby facilitating the detection of the tightness of the detected component 300 by the detecting device.

In some embodiments, as shown in fig. 2, the processing device 3 is connected to the control switch 16 for controlling the on and off of the control switch 16. For example, during detection, the processing device 3 sends a pulse control signal to the control switch 16, so that the control switch 16 is turned on, the first electrode 11 is electrically connected to the discharge source 13, and the electrostatic generator 1 generates a preset electric field. So designed, the processing device 3 can control the generation times of the preset electric field (that is, the discharge times of the first electrode 11) by controlling the on-off of the control switch 16, thereby facilitating the detection of the tightness of the gap 311 by the detection device.

The control switch 16 may be an electromagnetic switch or a switching element such as a transistor, and is not particularly limited herein.

In some embodiments, as shown in fig. 2, the electrostatic generator 1 further includes a current limiting resistor R, where the current limiting resistor R is disposed on the discharge line 14. This avoids potential safety hazards due to excessive current on the discharge line 14.

The number of the current limiting resistors R may be one or plural, and when the number of the current limiting resistors R is plural, the resistance values of the plural current limiting resistors R may be the same or different, and may be specific according to actual situations. For example, as shown in fig. 2, there are two current limiting resistors R, and the two current limiting resistors R are connected in series in the discharge line 14.

In some embodiments, as shown in fig. 2, the electrostatic generator 1 further includes a capacitor C, where one electrode plate of the capacitor C is connected to the discharge line 14 (for example, between two current limiting resistors R), and the other electrode plate is connected to the ground line 15, so as to filter noise generated by the discharge source 13.

In some embodiments, as shown in fig. 1 and 2, the electrostatic generator 1 further includes a housing 17, the discharge source 13, the capacitor C, and the current limiting resistor R are disposed in the housing 17, and the first electrode 11 is fixedly connected to the housing 17. By providing the housing 17, not only is a fixed carrier provided for the first electrode 11, but the housing 17 also protects the discharge source 13, the capacitor C, and the current limiting resistor R.

In some embodiments, as shown in fig. 1, the electrostatic generator 1 includes the above-described second electrode 12; the detection device further comprises a fixture 5, a positioning part 51 for positioning the tested part 300 is arranged on the fixture 5, and the second electrode 12 is arranged on the fixture 5 and is fixed relative to the positioning part 51. The fixture 5 is designed to fix the relative position between the measured component 300 and the second electrode 12, so that the position of the preset electric field between the second electrode 12 and the first electrode 11 can be stabilized, and the preset electric field can accurately act on the medium at a certain detection position of the gap 311, so as to detect the tightness of the gap 311 at the position.

In some embodiments, as shown in fig. 1, the component body 310 is an equipment housing of a terminal equipment (e.g. a mobile phone), the component body 310 includes an insulating frame 312, and an insulating cover plate 313 disposed in the insulating frame 312, the insulating cover plate 313 and the insulating frame 312 enclose a housing 314, and a gap 311 is formed between an edge of the insulating cover plate 313 and the insulating frame 312; the first side is the outside of the housing 314 (side a in the figure), and the second side is the inside of the housing 314 (side b in the figure).

The insulating cover 313 may be a cover disposed on a display side of the display panel, and the insulating cover 313 is a glass cover and the insulating frame 312 is a plastic frame.

The positioning portion 51 is a positioning ring groove for matching with the insulating frame 312, and the second electrode 12 is disposed in an area surrounded by the positioning ring groove. By providing the positioning portion 51 as the positioning ring groove, not only the measured member 300 can be positioned better, but also the structure of the positioning portion 51 is made simpler, which is advantageous for reducing the cost of the jig 5. By disposing the second electrode 12 in the area surrounded by the positioning ring groove, it is ensured that the second electrode 12 is located on the second side of the component body 310 to form a predetermined electric field with the first electrode 11.

Wherein the shape of the second electrode 12 is not unique, in some embodiments, as shown in fig. 1 and 7, fig. 7 is a cross-sectional view A-A in fig. 1. The second electrode 12 is a plate-shaped electrode, and the edge of the second electrode 12 is located at the notch of the positioning ring groove (i.e., near the gap 311). In this way, the second electrode 12 is designed so that the coverage area of the clamp 5 is large, and when the tightness of the annular gap 311 is detected, the tightness of the annular gap 311 can be detected by moving the first electrode 11 without changing the position of the second electrode 12.

In some embodiments, as shown in fig. 8, fig. 8 is a transverse cross-sectional view of the clamp 5 in some embodiments of the application. The second electrode 12 is an annular electrode, and the outer edge of the second electrode 12 is located at the notch of the positioning ring groove (that is, near the gap 311). In this way, when the tightness of the circumference of the annular gap 311 is detected, the tightness of the circumference of the annular gap 311 can be detected by moving the first electrode 11 without changing the position of the second electrode 12. And the second electrode 12 is arranged as a ring-shaped electrode, which is beneficial to saving the manufacturing material of the second electrode 12.

In some embodiments, as shown in fig. 9a, fig. 9a is a transverse cross-sectional view of the clamp 5 in other embodiments of the application. The second electrode 12 is a strip electrode, and the second electrode 12 is located at the notch of the positioning ring groove (that is, a position close to the gap 311) and extends along the extending direction of the positioning ring groove. The second electrode 12 is designed to have a small coverage area on the jig 5, and is suitable for detecting the tightness of the strip-shaped gap 311 in the member 300 to be detected, or detecting the tightness of a part of the annular gap 311.

In some embodiments, as shown in fig. 1, the second electrode 12 has a portion embedded in the fixture 5. By the design, the clamp 5 can well fix the second electrode 12, so that the stability of the second electrode 12 on the clamp 5 can be improved.

In some embodiments, as shown in fig. 1, an embedded portion 121 is formed on the second electrode 12, the embedded portion 121 is embedded in the jig 5, and the embedded portion 121 is connected to the ground line 15 through one side surface of the jig 5. So designed, the connection of the ground line 15 to the second electrode 12 is greatly facilitated.

The insertion portion 121 may have a columnar shape or a plate shape, and is not particularly limited herein.

In some embodiments, as shown in fig. 10, fig. 10 is a schematic structural diagram of a detection device according to other embodiments of the present application. The embodiment shown in fig. 10 differs from the embodiment shown in fig. 1 mainly in that: in the embodiment shown in fig. 10, the conductive portion of the part 300 to be tested located on the second side of the part body 310 is used as the second electrode 12.

The specific steps are as follows: the measured part 300 includes the second electrode 11; the component body 310 is a terminal device and includes an insulating frame 312 and an insulating cover 313; the second electrode 12 is connected to the insulating frame 312 to form a housing 314 (also referred to as a middle frame) with an opening 315 with the insulating frame 312, an insulating cover 313 is disposed at the opening 315, and a gap 311 is formed between the edge of the insulating cover 313 and the insulating frame 312; the first side is the outside of the housing 314 (a side shown in the figure), and the second side is the inside of the insulating frame 312 (b side shown in the figure).

The insulating cover 313 may be a cover disposed on the display side of the display panel, for example, the insulating cover 313 is a glass cover, the insulating frame 312 is a plastic frame, and the second electrode 12 is a metal wall connected to the insulating frame 312.

In this embodiment, by using the conductive portion of the component body 310 on the second side as the second electrode 12, it is not necessary to separately provide the second electrode 12, which simplifies the structure of the detecting device and is advantageous in reducing the cost of the detecting device.

As for other structures of the detection device in this embodiment, the detection device may be specifically set with reference to the embodiment shown in fig. 1, and will not be described herein.

In some embodiments, as shown in fig. 1, the first electrode 11 is a rod-shaped electrode, and has a discharge end 111 with a pointed shape, and the discharge end 111 is used to form a preset electric field with the second electrode 12. By setting the discharge end 111 to be pointed, not only is it convenient to generate a preset electric field (see the point discharge principle in particular), but also the position of the first electrode 11 can be precisely determined according to the position of the discharge end 111, so that the position of the medium 330 in the gap 311 acted by the preset electric field can be precisely determined, and further, the tightness detection can be precisely performed on a certain position of the gap 311.

In some embodiments, as shown in fig. 5, fig. 5 is a schematic diagram of a detection device according to some embodiments of the present application. The detection device further comprises a mechanical arm 4, and the first electrode 11 is connected to the mechanical arm 4. By the design, the mechanical arm 4 can drive the first electrode 11 to move to detect the tightness of the gap 311 of the tested part 300, so that the automation level of the detection device is improved, and the labor cost is reduced.

The first electrode 11 may be directly connected to the mechanical arm 4, or may be indirectly connected to the mechanical arm 4, as shown in fig. 5, the housing 17 of the electrostatic generator 1 is connected to the mechanical arm 4, and the first electrode 11 is fixed to the housing 17.

In some embodiments, as shown in fig. 5 and 6, fig. 6 is a schematic diagram illustrating a relationship between the processing device 3 and the detecting unit 2, the mechanical arm 4, and the control switch 16 of the electrostatic generator 1 in some embodiments of the present application. The processing means 3, such as a computer device, is used for controlling the movement track of the robot arm 4. Thus, the processing device 3 can drive a person to control the movement track of the mechanical arm 4, so that the automation level of the detection device can be further improved.

In some embodiments, as shown in fig. 5, the mechanical arm 4 includes a base 41, a rotating base 42, a front arm 43, and a rear arm 44, the rotating base 42 is rotatably connected to the base 41 through a vertical rotating shaft (not shown in the drawing), one end of the rear arm 44 is rotatably connected to the rotating base 42 through a first horizontal rotating shaft 45, the other end of the rear arm 44 is rotatably connected to the front arm 43 through a second horizontal rotating shaft 46, and the front arm 43 is used for connecting the first electrode 11. By the design, the mechanical arm 4 can drive the first electrode 11 to move more flexibly so as to adapt to the tightness detection of different gaps 311 of the tested part 300.

As shown in fig. 5, the housing 17 of the electrostatic generator 1 is connected to the end of the forearm 43 through a third horizontal rotation shaft 47. However, the present application is not limited thereto, and the case 17 of the electrostatic generator 1 may be connected to other portions of the forearm 43 as needed.

As shown in fig. 11, fig. 11 is a schematic diagram illustrating a cross-sectional shape of a gap 311 in a measured component 300 according to some embodiments of the present application. As shown in fig. 11 (a), the cross section of the gap 311 in the measured member 300 is rectangular, as shown in fig. 11 (b), the cross section of the gap 311 in the measured member 300 is L-shaped, as shown in fig. 11 (c) and (d), and the cross section of the gap 311 in the measured member 300 is roundabout.

The component body 310 may have a plate-like structure (as shown in fig. 11) or the like, in addition to the case structure, and is not particularly limited herein.

The detection principle of detecting whether or not the medium 330 in the gap 311 is broken down by a preset electric field is explained as follows:

the manner in which the detecting unit 2 detects whether the medium 330 in the gap 311 is broken down by the preset electric field is not unique in the embodiment of the present application, in some embodiments, the detecting unit 2 may detect whether the medium 330 in the gap 311 is broken down by the preset electric field by detecting an electrical parameter value, specifically as shown in fig. 2, the detecting unit 2 is configured to detect the electrical parameter value used for characterizing whether the medium 330 is broken down by the preset electric field in the electrostatic generator 1; the processing device 3 is configured to determine whether the medium 330 is broken down by a preset electric field according to the magnitude of the electrical parameter value. The electrical parameter value is the current value at the first electrode 11.

When the medium 330 in the gap 311 is broken down by the preset electric field, the concentration of carriers in the medium 330 increases sharply, the insulation of the medium 330 is lost, and a conductive channel is formed between the first electrode 11 and the second electrode 12, and the current value on the first electrode 11 increases rapidly, so that the processing device 3 can determine whether the medium 330 is broken down by the preset electric field according to the magnitude of the current value on the first electrode 11.

In this embodiment, the detecting unit 2 detects an electrical parameter value for indicating whether the medium 330 is broken down by a preset electric field, and the concentration of carriers in the medium 330 (that is, the insulation of the medium 330) can be quantitatively reflected by the magnitude of the electrical parameter value, so that the processing device 3 can accurately determine whether the medium 330 is broken down, and further determine whether the tightness of the tested component 300 is good or bad. Meanwhile, by taking the current value on the first electrode 11 as the electrical parameter value, the magnitude of the current value on the first electrode 11 can more intuitively reflect the concentration of the carriers in the medium 330 in the gap 311, that is, the greater the current value on the first electrode 11, the higher the concentration of the carriers in the medium 330 in the gap 311, the worse the insulativity of the medium 330, and the worse the sealability of the measured component 300, so that the processing device 3 can conveniently determine whether the sealability of the measured component is good or bad.

In some embodiments, as shown in fig. 2, the processing device 3 is specifically configured to: if the maximum value of the electrical parameter value is within the preset interval, determining that the medium 330 is broken down by the preset electric field; if the maximum value of the electrical parameter value is outside the preset interval, it is determined that the medium 330 is not broken down by the preset electric field.

Taking the electrical parameter value as the current value of the first electrode 11 as an example: setting the preset interval as [50mA, + ], if the detection unit 2 detects that the maximum value of the current value on the first electrode 11 is 80mA, the processing device 3 determines that the medium 330 is broken down by the preset electric field; if the detection unit 2 detects that the maximum value of the current value at the first electrode 11 is 1mA, the processing means 3 determines that the medium 330 is not broken down by the preset electric field.

By determining whether the medium 330 is broken down by the preset electric field by determining whether the maximum value of the electric parameter value is within the preset interval, the method is relatively simple, and the processing device 3 does not need complex operation, so that the accuracy of determining whether the medium 330 is broken down by the preset electric field by the processing device 3 is improved.

In some embodiments, as shown in fig. 1 and 2, the detection unit 2 is a current clamp, the first electrode 11 is a rod-shaped electrode, and the current clamp is clamped on the first electrode 11. By setting the detection unit 2 as a current clamp, the jaw of the current clamp is clamped on the first electrode 11 during installation, so that the installation of the detection unit 2 is convenient.

In some embodiments, as shown in fig. 3, fig. 3 is a schematic diagram of the relationship between the electrostatic generator 1 and the detecting unit 2 in other embodiments of the present application, except that the electrical parameter value may be the current value on the first electrode 11. The electrical parameter value is a current value on the discharge line 14, and the detection unit 2 is configured to detect the current value on the discharge line 14. By detecting the current value on the discharge line 14, the insulation of the medium 330 in the gap 311 can be accurately reflected, so that the processing device 3 can accurately determine whether the tightness of the tested component 300 is good or bad.

In some embodiments, as shown in fig. 3, the detection unit 2 is a current clamp, and the discharge line 14 is provided with a current clamp. So designed, the installation of the detection unit 2 is facilitated.

In some embodiments, as shown in fig. 4, fig. 4 is a schematic diagram of the relationship between the electrostatic generator 1 and the detection unit 2 in other embodiments of the present application. The electrical parameter value is a current value on the ground line 15, and the detection unit 2 is configured to detect the current value on the ground line 15. By detecting the current value on the ground line 15, the insulation of the medium 330 in the gap 311 can be accurately reflected, so that the processing device 3 can accurately determine whether the tightness of the tested component 300 is good or bad.

In some embodiments, as shown in fig. 4, the detection unit 2 is a current clamp, and the grounding line 15 is provided with a current clamp in a clamping manner. So designed, the installation of the detection unit 2 is facilitated.

The detection unit 2 in the embodiment of the present application may detect the current value on one of the first electrode 11, the discharge line 14, and the ground line 15, may detect the current value on two of the first electrode 11, the discharge line 14, and the ground line 15 at the same time, and may also detect the current value on three of the first electrode 11, the discharge line 14, and the ground line 15 at the same time. When the detection unit 2 is a current clamp, the current clamp may be clamped on one of the first electrode 11, the discharge line 14 and the ground line 15, the current clamp may be clamped on two of the first electrode 11, the discharge line 14 and the ground line 15, or the current clamp may be clamped on three of the first electrode 11, the discharge line 14 and the ground line 15, which may be specific according to practical situations.

Of course, the electrical parameter value may be a voltage value between the first electrode 11 and the second electrode 12, and the detection unit 2 is configured to detect the voltage value between the first electrode 11 and the second electrode 12, in addition to the current values on the first electrode 11, the discharge line 14, and the ground line 15. When the medium 330 in the gap 311 is broken down by the preset electric field, the concentration of the carriers in the medium 330 in the gap 311 increases sharply, the insulation of the medium 330 is lost, a conductive channel is formed between the first electrode 11 and the second electrode 12, and the voltage value between the first electrode 11 and the second electrode 12 decreases rapidly, so that the detecting unit 2 can determine whether the medium 330 in the gap 311 is broken down by the preset electric field by detecting the voltage value between the first electrode 11 and the second electrode 12, and further determine whether the tightness of the tested component 300 is good or bad.

In addition to the detection unit 2 in the embodiment of the present application, which can detect whether the medium 330 in the gap 311 is broken down by a preset electric field by detecting the value of the electrical parameter, in some embodiments, the detection unit 2 can also detect whether the medium 330 in the gap 311 is broken down by a preset electric field by acquiring thermal images at the positions of the first electrode 11 and the second electrode 12, specifically, the detection unit 2 is an infrared sensor for acquiring thermal images at the first electrode 11 and the second electrode 12.

The processing device 3 is used for: determining whether the medium 330 is broken down by a preset electric field according to the thermal imaging acquired by the detection unit 2; if an arc occurs in the thermal imaging that connects the first electrode 11 and the second electrode 12, it is determined that the medium 330 in the gap 311 is broken down; if the arc connecting the first electrode 11 and the second electrode 12 is not present in the thermal imaging, it is determined that the medium 330 in the gap 311 is not broken down.

To facilitate the user to distinguish between a part 300 under test that is qualified for sealing and a part 300 under test that is not qualified for sealing, in some embodiments, as shown in fig. 1, the processing device 3 is specifically configured to: if the medium 330 is broken down by the preset electric field, determining that the tightness of the tested part 300 is not qualified; if the medium 330 is not broken down by the preset electric field, the leak tightness of the tested part 300 is determined to be qualified. That is: the processing device 3 divides the tightness of the tested component 300 into two stages of pass and fail by whether the medium 330 is broken down by a preset electric field, which is beneficial to reducing the workload of the processing device 3 and improving the working efficiency of the processing device 3, and according to the determined result of the processing device 3, a user can accurately distinguish which tested component 300 is qualified and which tested component 300 is unqualified, so as to pick out and repair the tested component 300 with unqualified tightness in time.

In some embodiments, the electrostatic generator 2 is configured to apply a preset electric field to the medium 330 at a plurality of detection positions on the detected part 300, such as shown in fig. 1 and fig. 9b, and fig. 9b is a schematic diagram of the detection positions of the gaps 311 of the detected part 300 in some embodiments of the present application. The gap 311 is annular, and when in detection, the first electrode 11 moves to the detection position a1, the processing device 3 sends a pulse control signal to the electrostatic generator 1, so that the electrostatic generator 1 applies a preset electric field to a medium at the detection position a1 to perform tightness detection; the medium 330 at the detection position a2, the detection position a3 is then subjected to tightness detection in the same manner. Such a detection method can perform more accurate tightness detection on the measured member 300 with the gap 311 longer.

The movement of the first electrode 11 may be driven by the mechanical arm 4, or may be driven by the hand-held electrostatic generator 1 to move the first electrode 11, which is not limited herein.

The processing device 3 is used for: if the medium 330 at the plurality of detection positions is not broken down by the preset electric field, determining that the tightness of the detected part 300 is qualified; if the medium 330 at least one detection position is broken down by the preset electric field, the leak tightness of the detected part is determined to be unqualified. In this way, the processing device 3 can judge the tightness of the part 300 to be tested more accurately, and prevent some parts 300 to be tested, which are unqualified in tightness, from being erroneously determined as being qualified in tightness.

Of course, the electrostatic generator 2 may apply a preset electric field to the medium 330 at only one detection position on the measured component 300, for example, if the length of the gap 311 of the measured component 300 is shorter, the electrostatic generator 2 may detect only one detection position; alternatively, the electrostatic generator 2 may detect only a position where the sealing property of the part 300 to be tested is weak, for example, as shown in fig. 9b, the detection position a1 (i.e., the corner of the gap 311) is usually a position where the sealing property is weak, and the electrostatic generator 2 may detect only the detection position a1 of the part 300 to be tested.

To facilitate a user to obtain a lot of leak tightness yields (which may also be referred to as seal yields) for the part 300 under test, in some embodiments, as shown in FIG. 1, the processing device 3 is configured to: determining a first number N2, and a total number N1 of the tested parts 300 subjected to the tightness detection; then, the first ratio eta is determined according to the relation between the first ratio eta and the total number N1 and the first number N2. The first ratio η is a leak tightness qualification rate, and the first number N2 is the number of the tested components 300 having leak tightness.

The relation between eta and N1, N2 satisfies the following conditions: η=n2/n1×100%. For example, after a batch of parts 300 is tested for tightness, if N1 is 100 and N2 is 95, then the first ratio η (i.e., the tightness qualification rate) is 95%.

The sealing qualification rate is determined by the processing device 3, so that manual operation is omitted to calculate the sealing qualification rate, thereby being beneficial to reducing the labor cost and improving the automation level of the detection device.

In some embodiments, the processing means 3 may determine the first number N2 by, as shown in fig. 1, the detecting means further comprising a first counter 6, the processing means 3 being adapted to: after the leak tightness of the part 300 to be tested is determined to be acceptable, a pulse signal is sent to the first counter 6. The first counter 6 is used for recording the number N3 of pulse signals. The processing device 3 is also configured to: the number of pulse signals N3 is acquired, and then the first number N2 is determined according to the relation between the first number N2 and the number of pulse signals N3.

For example, each time the processing device 3 confirms that the tightness of one tested component 300 is qualified, a pulse signal is sent to the first counter 6, if a batch of tested components 300 are detected, the number N3 of pulse signals recorded by the first counter 6 is 95, and according to the relation between the first number N2 and the number N3 of pulses: n2=n3, then the processing means 3 confirms that the first number N2 is 95.

The first number N2 is determined by the number N3 of the pulse signals, so that the first number N2 confirmed by the processing device 3 is more accurate, large deviation is not easy to occur, and further the confirmation of the tightness qualification rate is more accurate.

The first counter 6 may be integrated with the processing device 3, or may be provided separately from the processing device 3, and is not particularly limited herein.

Of course, the processing device 3 may also determine the number of blinks of the indicator lamp, in addition to confirming the first number N2 in the above manner, as follows: the detection device further comprises an indicator light and a counting unit, and the processing device 3 is used for: after the tightness of the tested part 300 is determined to be qualified, an electric signal is sent to the indicator lamp, so that the indicator lamp flashes once; the counting unit is used for recording the number of times of flashing of the indicator lamp. The processing device 3 is also configured to: the number of the blinking of the indicator light is obtained, and then the first number N2 is determined according to the relation between the first number N2 and the number of the blinking of the indicator light.

In some embodiments, the processing means 3 may determine the total number N1 by, as shown in fig. 1, the processing means 3 being configured to issue a pulse control signal to the electrostatic generator 1 to cause the electrostatic generator 1 to generate a preset electric field;

the detection means further comprise a second counter 7, the second counter 7 being arranged to record the number N4 of pulse control signals; the processing device 3 is also configured to: the number of pulse control signals N4 is acquired, and then the relation between the total number of roots N1 and the number of pulse control signals N4 is determined, so that the total number N1 is determined.

The total number N1 is determined by the number N4 of the pulse control signals, so that the total number N1 confirmed by the processing device 3 is more accurate, large deviation is not easy to occur, and further the confirmation of the sealing qualification rate eta is more accurate.

The second counter 7 may be integrated with the processing device 3, or may be provided separately from the processing device 3, and is not particularly limited herein.

The number N5 of the detecting positions on the detected part 300 may be plural or one; when the number N5 of the detection positions on the part 300 to be detected is plural, the electrostatic generator 1 is configured to apply a predetermined electric field to the medium 330 at the plural detection positions on the part 300 to be detected, respectively. The processing device 3 is used for: and determining the total number N1 according to the relation between the total number N1 and the number N4 of the pulse control signals and the number N5 of the detection positions.

For example, as shown in fig. 1 and 9b, the processing device 3 issues a total of 3 pulse control signals (i.e., equal to the number N5 of detection positions) every time the electrostatic generator 1 detects the tightness of one component 300 under test; if the number N4 of pulse control signals recorded by the second counter 7 is 300 after the detection of a batch of the tested components 300 is completed, according to the relationship between the total number N1 and the number N4 of pulse control signals and the number N5 of detection positions: n1=n4/N5, then the processing means 3 confirms that the total number N1 is 100.

When the number of detection positions on the detected part 300 is one, the processing device 3 is configured to: the total number N1 is determined according to the relationship between the total number N1 and the number N4 of the pulse control signals.

For example, each time the electrostatic generator 1 detects the tightness of one tested component 300, the processing device 3 sends out 1 pulse control signal, if the number N4 of pulse control signals recorded by the second counter 7 is 100 after the tested components 300 are detected, according to the relation between the total number N1 and the number N4 of pulse control signals: n1=n4, then the processing means 3 confirms that the total number N1 is 100.

Of course, the processing device 3 can confirm the total number N1 in addition to the above manner, by: the detecting means comprises an infrared counter which is arranged on a table on which the parts 300 to be measured are placed and which is used for recording the number of the parts 300 to be measured, and the processing means 3 confirms the total number N1 by recording the number of the parts 300 to be measured by means of the infrared counter. In addition to the first ratio η being a leak tightness percentage, in other embodiments, the first ratio η may also be a leak tightness percentage, and correspondingly, the first number N2 is the number of tested components 300 that are leak tightness percentage. Thus, manual work is omitted to calculate the defective rate of the tightness, thereby being beneficial to reducing the labor cost and improving the automation level of the detection device.

In this embodiment, the first number N2 is determined similarly to the description in the embodiment in which the first ratio η is the leak tightness qualification rate, that is: the processing device 3 is used for: after determining that the leak tightness of the measured component 300 is not acceptable, sending a pulse signal to the first counter 6; the first counter 6 is used for recording the number N3 of pulse signals; the processing device 3 is also configured to: the number of pulse signals N3 is acquired, and then the first number N2 is determined according to the relation between the first number N2 and the number of pulse signals N3.

The determination of the total number N1 may be specifically described in the embodiment where the first ratio η is the leak tightness qualification rate, and will not be described herein.

As shown in fig. 1 and 12, fig. 12 is a flowchart of a detection method of a detection device according to some embodiments of the present application. The detection method of the detection device is used for detecting the tightness of the detected part 300. The tested part 300 comprises a part body 310 and a sealing body 320, wherein the part body 310 is provided with a first side, a second side and a gap 311 communicated with the first side and the second side, the sealing body 320 is arranged in the gap 311, and the breakdown strength of the sealing body 320 is smaller than that of the part body 310.

The detection device comprises an electrostatic generator 1, wherein the electrostatic generator 1 comprises a first electrode 11, and the first electrode 11 is arranged on a first side and can form a preset electric field acting on a medium 330 in a gap 311 with a second electrode 12 arranged on a second side; the medium 330 includes a seal 320 or the medium 330 includes air 340 and a seal 320.

The detection method of the detection device comprises the following steps:

s1, applying a preset electric field to a medium 330 by the electrostatic generator 1;

s2, detecting whether the medium 330 is broken down by a preset electric field; the tightness of the tested part 300 is determined according to whether the medium 330 is broken down by a preset electric field.

By detecting whether the medium 330 in the gap 311 is broken down by a preset electric field, the tightness of the gap 311 can be determined, so that the tested part 300 with poor tightness can be detected, and the problems of water inlet oxygen, dust and the like in the using process are avoided from influencing the normal operation of the tested part 300; the detection method is simple in process, does not need to damage the detected part 300 before detection, and can be well suitable for detecting the tightness of the detected part 300 in mass production.

In some embodiments, as shown in fig. 1 and 13, fig. 13 is a flowchart of a detection method of a detection device according to some embodiments of the present application for determining whether a medium 330 is broken down by a preset electric field.

In S2, detecting whether the medium 330 is broken down by the preset electric field includes:

s21, detecting an electrical parameter value used for representing whether the medium 330 is broken down by a preset electric field in the electrostatic generator 1;

as shown in fig. 2, the electrostatic generator 1 includes a discharge line 14, and a ground line 15 for grounding, the discharge line 14 being connected between the discharge source 13 and the first electrode 11, the ground line 15 being for connecting the discharge source 13 and the second electrode 12. Wherein the electrical parameter values include current values on at least one of the discharge line 14, the ground line 15, and the first electrode 11.

By using the current value of at least one of the first electrode 11, the discharge line 14, and the ground line 15 as the electrical parameter value, the insulation of the medium 330 in the gap 311 can be more intuitively and accurately reflected, that is, the greater the current value, the worse the insulation of the medium 330 in the gap 311 (the higher the density of carriers in the medium 330), and the worse the tightness of the measured component 300, so that it is convenient to determine whether the tightness of the measured component is good.

In addition to the above, the electrical parameter value may also be a voltage value between the first electrode 11 and the second electrode 12.

After detecting the electrical parameter value, S2 further comprises:

s22, determining whether the medium 330 is broken down by a preset electric field according to the magnitude of the electric parameter value.

Since the magnitude of the electrical parameter value can quantitatively reflect the concentration of the carriers in the medium 330 (i.e., the insulation of the medium 330) in the gap 311, the detection device can more accurately determine whether the medium 330 is broken down by the preset electric field according to the magnitude of the electrical parameter value.

Wherein S22 includes: determining that the medium 330 is broken down by the preset electric field when the maximum value of the electrical parameter value is within the preset interval; when the maximum value of the electrical parameter value is outside the preset interval, it is determined that the medium 330 is not broken down by the preset electric field.

Whether the medium 330 is broken down by the preset electric field is judged by whether the maximum value of the electric parameter value is in the preset interval, and the method is simple and does not need complex operation, so that the accuracy of determining whether the medium 330 is broken down by the preset electric field is improved.

Of course, in addition to determining whether the medium 330 is broken down by the preset electric field by the magnitude of the electric parameter value, it is also possible to determine whether the medium 330 is broken down by the preset electric field by acquiring thermal imaging at the first electrode 11 and the second electrode 12 and then detecting whether an arc occurs between the first electrode 11 and the second electrode 12 in the thermal imaging.

The detection device and the detection method thereof in the embodiment of the application can detect the tightness of the detected component 300 and also can detect the insulativity of the medium 330 in the gap 311 of the detected component 300, so that the detected component 300 with poor insulativity of the medium 330 in the gap 311 can be detected, and the influence of external static electricity on the normal operation of the detected component 300 in the using process is avoided.

To facilitate a user to distinguish between a part 300 under test that is qualified for sealing and a part 300 under test that is not qualified for sealing, in some embodiments, as shown in fig. 1 and 12, in S2, determining the tightness of the part 300 under test according to whether the medium 330 is broken down by a preset electric field includes: if the medium 330 is broken down by a preset electric field, determining that the tightness of the tested part 300 is not qualified; if the medium 330 is not broken down by the preset electric field, it is determined that the tightness of the tested part 300 is good.

The medium 330 is broken down by a preset electric field to divide the tightness of the tested part 300 into two stages of pass and fail, so that the detection efficiency of the detection device is improved, and according to the result determined by the detection device, a user can accurately distinguish which tested parts 300 are qualified in tightness and which tested parts 300 are unqualified in tightness, so that the tested parts 300 with unqualified tightness are picked out and repaired in time.

In some embodiments, S1 comprises: the electrostatic generator 1 applies a preset electric field to the medium 330 at a plurality of detection positions on the part 300 to be measured, respectively.

In S2, determining the tightness of the tested component 300 according to whether the medium 330 is broken down by the preset electric field includes:

as shown in fig. 1 and 9b, if the medium 330 at each of the plurality of detection positions is not broken down by the preset electric field, it is determined that the tightness of the tested part 300 is acceptable; if the medium 330 at least one detection position is broken down by the preset electric field, it is determined that the tightness of the tested part 300 is not qualified.

By the above steps, the tightness of the tested component 300 can be judged more accurately, and the tested component 300 with unqualified tightness can be prevented from being determined as qualified tightness by mistake.

In order to facilitate a user to obtain a lot of leak tightness yields of the tested parts 300, in some embodiments, as shown in fig. 1 and 14, fig. 14 is a flowchart of a method for determining leak tightness yields in some embodiments of the application.

S4, determining a first number N2 and the total number N1 of the tested components 300 subjected to the tightness detection;

s5, determining the first ratio eta according to the relation between the first ratio eta and the total number N1 and the first number N2.

The first ratio η is a leak tightness qualification rate, and the first number N2 is the number of the tested components 300 having leak tightness.

Through the steps, manual work is omitted to calculate the tightness qualification rate, so that the labor cost is reduced, and the automation level of the detection device is improved.

In some embodiments, as shown in fig. 1 and 15, fig. 15 is a flowchart of a method for determining a first number N2 in some embodiments of the present application, where determining the first number N2 includes:

s41, after the leak tightness of the tested part is determined to be qualified, sending out a pulse signal;

s42, acquiring the number N3 of pulse signals;

s43, determining the first number N2 according to the relation between the first number N2 and the number N3 of the pulse signals.

The first number N2 is determined through the number N3 of the pulse signals, so that the first number N2 is more accurate, large deviation is not easy to occur, and the sealing qualification rate is more accurate.

In some embodiments, as shown in fig. 1, 12 and 16, fig. 16 is a flowchart of a method for determining the first number N2 in some embodiments of the present application, and S1 includes:

s11, sending out pulse control signals to the electrostatic generator 1 so that the electrostatic generator 1 applies a preset electric field to the medium 330.

Determining the total number N1 includes:

s45, acquiring the number N4 of pulse control signals;

s46, determining the total number N1 according to the relation between the total number N1 and the number N4 of the pulse control signals.

The total number N1 is determined through the number N4 of the pulse control signals, so that the total number N1 can be more accurate, large deviation is not easy to occur, and the sealing qualification rate eta is more accurate.

In some embodiments, as shown in fig. 12, S1 comprises:

as shown in fig. 1 and 9b, the electrostatic generator 1 applies a preset electric field to the medium 330 at a plurality of detection positions on the part 300 to be detected, respectively.

As shown in fig. 16, S46 includes: and determining the total number N1 according to the relation between the total number N1 and the number N4 of the pulse control signals and the number N5 of the detection positions.

The relationship between the total number N1 and the number N4 of the pulse control signals and the number N5 of the detection positions may be: n1=n4/N5, for example, if the number N4 of pulse control signals obtained after the detection of a batch of the tested components 300 is 300, according to n1=n4/N5, the total number N1 is 100.

The above method is applicable to the determination of the total number N1 when there are a plurality of inspection positions on the part 300 to be inspected.

In addition to the first ratio η being a leak tightness percentage, in other embodiments, the first ratio η may also be a leak tightness percentage, and correspondingly, the first number N2 is the number of tested components 300 that are leak tightness percentage. As for the determination method of the total number N1 and the first number N2, the body may refer to the first ratio η as described in the embodiment of the leak tightness qualification rate, which is not described herein.

Features of the detection method embodiment of the detection device that are the same as or similar to those of the product embodiment of the detection device may be specifically referred to the description of the product embodiment of the detection device, and are not described herein.

As shown in fig. 5, the embodiment of the present application further provides a production apparatus, which includes a table 200 and the inspection device 100 described in any of the above embodiments, where the table 200 is used to place the part 300 to be inspected.

The table 200 may be a fixed table or a movable table for transferring the measured member 300, and is not particularly limited.

The measured component 300 may be placed directly on the table 200 or may be placed on the jig 5 on the table 200, and is not particularly limited herein.

In some embodiments, the production equipment may be an assembly line of the tested component 300, so that the tightness detection of the detection device may be completed on the same production equipment as the assembly of the tested component 300, thereby avoiding the transportation of the tested component 300 for a longer distance in the assembly and tightness detection process, and improving the overall production efficiency of the tested component 300.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A detecting device for detecting tightness of a member to be detected;

The tested part comprises a part body and a sealing body, wherein the part body is provided with a first side, a second side and a gap communicated with the first side and the second side, the sealing body is arranged in the gap, and the breakdown strength of the sealing body is smaller than that of the part body;

the detection device includes:

the electrostatic generator comprises a first electrode, a second electrode and a first electrode, wherein the first electrode is arranged on the first side and can form a preset electric field acting on a medium in the gap with the second electrode arranged on the second side; the medium comprises the sealing body or the medium comprises air and the sealing body;

a detection unit for detecting whether the medium is broken down by the preset electric field;

processing means for determining the tightness of the part under test according to whether the medium is broken down by the preset electric field;

the tested part is electronic equipment, and the static generator comprises the second electrode;

the detection device further comprises a clamp, a positioning part used for positioning the tested part is arranged on the clamp, and the second electrode is arranged on the clamp and is fixed relative to the positioning part in position;

The component body comprises an insulating frame and an insulating cover plate arranged in the insulating frame, wherein the insulating cover plate and the insulating frame enclose a shell, and the gap is formed between the edge of the insulating cover plate and the insulating frame; the first side is the outer side of the shell, and the second side is the inner side of the shell;

the positioning part is a positioning ring groove matched with the insulating frame, and the second electrode is arranged in an area surrounded by the positioning ring groove;

the second electrode is an annular electrode, and the outer side edge of the second electrode is positioned at the notch of the positioning ring groove.

2. The detecting device according to claim 1, wherein,

the processing device is specifically used for: if the medium is not broken down by the preset electric field, determining that the tightness of the tested part is qualified; if the medium is broken down by the preset electric field, determining that the tightness of the tested part is not qualified.

3. The detecting device according to claim 2, wherein,

the static generator is used for respectively applying the preset electric fields to the medium at a plurality of detection positions on the detected part;

the processing device is used for: if the mediums at the detection positions are not broken down by the preset electric field, determining that the tightness of the detected part is qualified; and if at least one medium at the detection position is broken down by the preset electric field, determining that the tightness of the tested part is unqualified.

4. The detecting device according to claim 1, wherein,

the detection unit is used for detecting an electrical parameter value used for representing whether the medium is broken down by the preset electric field in the electrostatic generator;

the processing device is used for determining whether the medium is broken down by the preset electric field according to the magnitude of the electric parameter value.

5. The detecting device according to claim 4, wherein,

the processing device is specifically used for: if the maximum value of the electrical parameter value is in a preset interval, determining that the medium is broken down by the preset electric field; and if the maximum value of the electrical parameter value is outside the preset interval, determining that the medium is not broken down by the preset electric field.

6. The detecting device according to claim 4, wherein,

the electrostatic generator further comprises a discharge source, a discharge line connected between the discharge source and the first electrode, and a grounding line for grounding, wherein the grounding line is used for connecting the discharge source and the second electrode;

the electrical parameter values include current values on at least one of the discharge line, the ground line, and the first electrode.

7. The detecting device according to claim 6, wherein,

the first electrode is a rod-shaped electrode, and the detection unit is a current clamp; the current clamp is clamped on at least one of the first electrode, the discharge circuit and the grounding circuit.

8. The detecting device according to claim 6, wherein,

the static generator also comprises a control switch arranged on the discharge line; the processing device is connected with the control switch and used for controlling the on and off of the control switch.

9. The detecting device according to any one of claims 2 to 8, wherein,

the processing device is used for: determining a first number, and a total number of the tested components subjected to tightness detection; then determining a first ratio according to the relation between the first ratio and the total number and the first number;

wherein the first number is the number of the tested components with qualified tightness, and the first ratio is the qualified tightness rate; alternatively, the first number is the number of the tested parts that fail in sealability, and the first ratio is the rate of fail in sealability.

10. The detecting device according to claim 9, wherein,

the detection device further comprises a first counter;

the processing device is used for: after the leak tightness of the tested part is determined to be qualified, or after the leak tightness of the tested part is determined to be unqualified, a pulse signal is sent to the first counter; the first counter is used for recording the number of the pulse signals;

the processing device is also used for: the number of pulse signals is acquired, and then the first number is determined according to the relation between the first number and the number of pulse signals.

11. The detecting device according to claim 9, wherein,

the processing device is used for sending a pulse control signal to the static generator so that the static generator applies the preset electric field to the medium of the tested part;

the detection device further comprises a second counter, wherein the second counter is used for recording the number of the pulse control signals; the processing device is also used for: the number of pulse control signals is obtained, and then the total number is determined according to the relation between the total number and the number of pulse control signals.

12. The apparatus of claim 11, wherein the sensor is configured to detect,

the processing device is used for: and determining the total number according to the relation between the total number and the number of the pulse control signals and the number of the detection positions.

13. The detecting device according to any one of claims 1 to 7, wherein,

the detection device further comprises a mechanical arm, and the first electrode is connected to the mechanical arm.

14. The apparatus of claim 13, wherein the sensor is configured to detect,

the processing device is used for controlling the movement track of the mechanical arm.

15. The detecting device according to claim 1, wherein,

the second electrode has a portion embedded in the fixture.

16. A production facility, comprising:

the detection device of any one of claims 1 to 15;

and the workbench is used for placing the tested part.

17. A detection method of a detection device, characterized in that the detection device is used for detecting the tightness of a detected part;

The detection device comprises an electrostatic generator, wherein the electrostatic generator comprises a first electrode, and the first electrode is used for being arranged on the first side and can form a preset electric field acting on a medium in the gap with a second electrode arranged on the second side; the medium comprises the sealing body or the medium comprises air and the sealing body;

The second electrode is an annular electrode, and the outer side edge of the second electrode is positioned at the notch of the positioning ring groove;

the detection method of the detection device comprises the following steps:

the static generator applies a preset electric field to the medium; detecting whether the medium is broken down by the preset electric field;

and determining the tightness of the tested part according to whether the medium is broken down by the preset electric field.

18. The method of detecting a device according to claim 17, wherein,

determining the tightness of the tested component according to whether the medium is broken down by the preset electric field, wherein the method comprises the following steps:

if the medium is broken down by the preset electric field, determining that the tightness of the tested part is unqualified; if the medium is not broken down by the preset electric field, determining that the tightness of the tested part is qualified.

19. The method of detecting a device according to claim 17, wherein,

the electrostatic generator applies a preset electric field to the medium, comprising: the static generator respectively applies the preset electric fields to the medium at a plurality of detection positions on the detected part;

If the mediums at the detection positions are not broken down by the preset electric field, determining that the tightness of the detected part is qualified; and if at least one medium at the detection position is broken down by the preset electric field, determining that the tightness of the tested part is unqualified.

20. The method of detecting a device according to claim 17, wherein,

detecting whether the medium is broken down by the preset electric field comprises the following steps: detecting an electrical parameter value in the electrostatic generator, wherein the electrical parameter value is used for representing whether the medium is broken down by the preset electric field;

after detecting the electrical parameter value, the detection method of the detection device further comprises: and determining whether the medium is broken down by the preset electric field according to the magnitude of the electric parameter value.

21. The method of claim 20, wherein,

determining whether the medium is broken down by the preset electric field according to the magnitude of the electric parameter value comprises the following steps:

when the maximum value of the electrical parameter value is within a preset interval, determining that the medium is broken down by the preset electric field; and when the maximum value of the electrical parameter value is outside the preset interval, determining that the medium is not broken down by the preset electric field.

22. The method of claim 20, wherein,

the electrostatic generator comprises a discharge source, a discharge circuit and a grounding circuit, wherein the grounding circuit is used for grounding, the discharge circuit is connected between the discharge source and the first electrode, and the grounding circuit is used for connecting the discharge source and the second electrode;

23. The detection method of the detection apparatus according to any one of claims 18 to 22, characterized by further comprising:

determining a first number, and a total number of the tested components subjected to tightness detection;

determining a first ratio according to the relation between the first ratio and the total number and the first number;

24. The method of claim 23, wherein,

Determining the first number includes:

after the leak tightness of the tested part is determined to be qualified, or after the leak tightness of the tested part is determined to be unqualified, a pulse signal is sent out;

acquiring the number of the pulse signals;

the first number is determined according to a relationship between the first number and the number of pulse signals.

25. The method of claim 23, wherein,

the electrostatic generator applies a preset electric field to the medium, comprising: sending a pulse control signal to the electrostatic generator so that the electrostatic generator applies the preset electric field to the medium;

determining the total number includes:

acquiring the number of the pulse control signals;

the total number is determined according to the relationship between the total number and the number of the pulse control signals.

26. The method of claim 25, wherein,

determining the total number from a relationship of the total number to the number of pulse control signals, comprising:

And determining the total number according to the relation between the total number and the number of the pulse control signals and the number of the detection positions.