Plum blossom contact pressure tester and detection system

Abstract

The present invention discloses a plum blossom contact pressure tester and a detection system, and relates to the technical field of pressure detection devices for electrical components, including a handle, wherein a cavity structure is formed inside the handle, and is characterized in that the plum blossom contact pressure tester also includes: a data transmission component, which is arranged in the cavity structure of the handle; at least one pair of sensor components, which are respectively connected to the input end of the data transmission component; and a plurality of the sensor components are arranged at the upper end of the handle at equal angles through a connecting component. The disclosed technical solution quantitatively detects the radial elastic deformation contact pressure of the plum blossom contact piece.

Description

Technical Field

[0001] The invention discloses and relates to the technical field of pressure detection devices for electrical components, and in particular to a plum blossom contact pressure tester and a detection system. Background Art

[0002] The plum blossom contact is used for primary conduction in high-voltage vacuum circuit breakers, center cabinets, trolleys, etc. Accurate measurement of the pressure of the plum blossom contact can effectively control the contact resistance, reduce the heat generation of the contact part, and improve the reliability and safety of conduction. The known plum blossom contact is composed of a contact piece, a support frame, a tension spring, etc. The tension spring provides a radial force to make each contact piece tightly connected to the static contact. At present, the radial elastic deformation contact pressure of each contact piece can only be controlled by controlling the quality (material, size) of the tension spring. The radial elastic deformation contact pressure of the contact piece cannot be quantitatively detected, and it is impossible to verify whether it reaches the specified value. Designing a plum blossom contact pressure testing device that can quantitatively detect the radial elastic deformation contact pressure of the plum blossom contact is an urgent problem to be solved. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the disclosed embodiment of the present invention provides a plum blossom contact pressure tester. The technical solution is as follows:

[0004] According to a first aspect of the disclosed embodiment of the present invention, there is provided a plum blossom contact pressure tester, comprising a handle, wherein a cavity structure is formed inside the handle, and the plum blossom contact pressure tester further comprises:

[0005] The plum blossom contact pressure tester also includes:

[0006] A data transmission component is disposed in the cavity structure of the handle;

[0007] At least one pair of sensor components are respectively connected to the input end of the data transmission component; a plurality of the sensor components are arranged at the upper end of the handle at equal angles through the connecting component.

[0008] In one embodiment, the data transmission component includes at least two data processing chips and a power supply, at least two of the data processing chips are respectively connected in parallel to the power supply, at least the two data processing chips are arranged in the upper part of the cavity structure of the handle, and the power supply is arranged in the lower part of the cavity structure of the handle.

[0009] In one embodiment, the connection assembly includes a mounting block and a fixing seat, wherein:

[0010] The mounting block is arranged at the upper end of the handle, and the lower end of the fixing seat passes through the mounting block and is inserted into the cavity structure of the handle.

[0011] In one embodiment, the sensor assembly includes a test head and a sensor, wherein:

[0012] The test head is connected to the sensor via a test head fixing piece;

[0013] A pair of sensors in each sensor assembly is mounted at equal angles on the side surface of the fixing base.

[0014] In one embodiment, at least one pair of sensor positioning plates are disposed on the upper surface of the mounting block, and the at least one pair of sensor positioning plates are symmetrically arranged about the axis of the fixing seat and are attached and fixed to the surface of the sensor.

[0015] In one embodiment, a dust cover is provided at the upper end of the mounting block, and an opening for passing the detection head is formed on the upper surface of the dust cover.

[0016] In one embodiment, the lower surface of the handle forms an opening communicating with the internal cavity structure thereof, and an end cap is provided at the opening.

[0017] The data processing and display terminal comprises a shell, a main control MCU arranged inside the shell, a display screen arranged on the surface of the shell, a key assembly, and an embedded printer arranged in the shell with a printing port exposed.

[0018] According to a first aspect of an embodiment of the present disclosure, a detection system using the above-mentioned plum blossom contact pressure tester is provided. The detection system includes the plum blossom contact pressure tester and a data processing and display terminal. The plum blossom contact pressure tester transmits detection data to the data processing and display terminal wirelessly.

[0019] The technical solution provided by the embodiments disclosed in the present invention may have the following beneficial effects:

[0020] First, each group of symmetrically arranged sensors extends into the internal channel of the plum blossom contact to detect the radial elastic deformation contact pressure of the contact piece of the plum blossom contact;

[0021] Second, the pressure detection analog quantity is converted into digital quantity through the data processing chip and sent to the display to accurately obtain the pressure measurement value;

[0022] Third, use the mounting block to fix the sensor assembly on the upper end of the handle, which is convenient for disassembly. When a fault occurs, it can be replaced with a spare sensor assembly without delaying use;

[0023] Fourth, the fixing base is fixed with the lower part of multiple symmetrically arranged sensor assemblies, and multiple sensor assemblies are fixed on the side wall of the fixing base at equal angles, and the fastening force is uniform;

[0024] Fifth, a sensor positioning assembly that is symmetrical about the fixing seat is used to prevent the sensor from axially deviating from the initial position due to external force during installation or use.

[0025] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] Figure 1 It is a cross-sectional view of a plum blossom contact pressure tester according to the present invention;

[0028] Figure 2 It is a partial cross-sectional view of a plum blossom contact pressure tester according to the present invention.

[0029] Figure 3 It is a perspective view of a plum blossom contact pressure tester according to the present invention;

[0030] Figure 4 It is a stereoscopic diagram of a plum blossom contact pressure tester according to the present invention;

[0031] Figure 5-1 This is a first installation explosion diagram of a plum blossom contact pressure tester according to the present invention;

[0032] Figure 5-2 This is a second installation explosion diagram of a plum blossom contact pressure tester according to the present invention;

[0033] Figure 6-1 yes Figure 3 AA surface section view;

[0034] Figure 6-2 is a top view of the sensor positioning sheet of the invention;

[0035] Figure 7 is a connection diagram of the detection system of the present invention;

[0036] Figure 8 is a connection diagram of the detection system of the present invention;

[0037] Fig. 9 The main control circuit diagram of the plum blossom contact pressure tester of the present invention;

[0038] Fig.10 An electrical schematic diagram of the connection between the test head and the sensor of the present invention;

[0039] Reference numerals:

[0040] 1. Mounting block 2. Fixing base 3. Sensor

[0041] 4. Cavity structure 5. Sensor positioning sheet 501. Smooth part

[0042] 502, second screw 6, test head 7, test head fixing plate

[0043] 701, third screw 702, fourth screw 8, handle

[0044] 9. Anti-slip nut 10. End cover 11. Dust cover

[0045] 12. Power supply 13. Data processing chip 1401. Shell

[0046] 1402, main control MCU 1403, display screen 1404, button assembly

[0047] 1405, Embedded Printer 201, First Screw DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0049] The technical solution provided by the disclosed embodiment of the present invention relates to a plum blossom contact pressure tester, and in particular to the technical field of electrical component pressure detection devices. In the related art, the plum blossom contact is composed of a contact piece, a support frame, a tension spring, etc. The tension spring provides a radial force to make each contact piece tightly connected with the static contact. At present, the radial elastic deformation contact pressure of each contact piece can only be controlled by controlling the quality (material, size) of the tension spring, etc. The radial elastic deformation contact pressure of the contact piece cannot be quantitatively detected, and it is impossible to verify whether it reaches the specified value. Based on this, in the plum blossom contact pressure tester provided by the technical solution of the present disclosure, each group of symmetrically arranged sensors extends into the internal channel of the plum blossom contact to detect the radial elastic deformation contact pressure of the contact piece of the plum blossom contact; through the data processing chip, the pressure detection analog quantity is converted into a digital quantity and sent for display, so as to accurately obtain the pressure measurement value; the sensor assembly is fixed to the upper end of the handle by using a mounting block, which is convenient for disassembly. When a fault occurs, it can be replaced with a spare sensor assembly without delaying the use; the fixing seat and the lower part of the multiple groups of symmetrically arranged sensor assemblies are fixed, and the multiple groups of sensor assemblies are fixed on the side wall of the fixing seat at equal angles, and the tightening force is uniform; a sensor positioning assembly symmetrical about the fixing seat is used to prevent the sensor from axially deviating from the initial position due to external force during installation or use.

[0050] Figure 1The cross-sectional view of the plum blossom contact pressure tester provided by the technical solution disclosed in the present invention is exemplified. Figures 1 to 10 It can be seen that it includes a handle, and a cavity structure is formed inside the handle. The plum blossom contact pressure tester also includes: one or more sensor components, and the more than one sensor components are arranged at equal angles on the upper end of the handle 8 through a connecting component; a data transmission component, and the data transmission component is arranged in the cavity structure 4 of the handle 8; at least one pair of the sensor components are respectively connected to the input end of the data transmission component. It should be further pointed out that the number of sensor components can be a cardinality or an even number. Considering the production cost and the accuracy of pressure measurement, the number is preferably six. In the example, six pressure sensor components are arranged at equal angles around the fixed seat.

[0051] In the example, the mounting block 1 is threadedly connected to the handle 8 for easy disassembly.

[0052] In the example, Figures 8 to 10 As shown, the sensor uses a commercially available piezoresistive strain gauge pressure sensor, the button component uses a 16-key matrix industrial keyboard, the display screen uses a 5-inch color screen tftSTM32 sold on Taobao, and the SPIFSMC directly driven display screen. The above components can be connected and communicated with the main control MCU, and the main control MCU selects a single-chip microcomputer model STM32F103V8 / B / CT6.

[0053] In one embodiment, the data transmission component includes at least two data processing chips 13 and a power supply 12. At least two of the data processing chips 13 are respectively connected in parallel with the power supply 12. At least the two data processing chips 12 are arranged in the upper part of the cavity structure 4 of the handle 8, and the power supply 12 is arranged in the lower part of the cavity structure 4 of the handle 8. It should be further pointed out that in order to save space and facilitate disassembly and replacement, at least two data processing chips 12 are arranged in parallel at equal distances in the cavity structure 4, and the distance between two adjacent data processing chips 12 is in the range of 3-5mm, which is conducive to heat dissipation and prolongs the service life of the data processing chip 12.

[0054] In one embodiment, the connecting assembly includes a mounting block 1 and a fixing seat 2, wherein the mounting block 1 is arranged at the upper end of the handle 8, and the lower end of the fixing seat 2 passes through the mounting block 1 and is inserted into the cavity structure 4 of the handle 8. It should be further pointed out that the contact portion between the mounting block 1 and the handle 8 is provided with an anti-slip nut 9 to prevent relative displacement between the mounting block 1 and the handle 8.

[0055] In one embodiment, the sensor assembly includes a test head 6 and a sensor 3, wherein the test head 6 is connected to the sensor 3 via a test head fixing plate 7; a pair of sensors 3 of each group of sensor assemblies are mounted at equal angles on the side surface of the fixing seat 2. It should be further pointed out that the upper part of the test head fixing plate 7 is fixed to the side surface of the test head 6 by a third screw 701, and the lower part of the test head fixing plate 7 is fixed to the side surface of the sensor by a fourth screw 702, thereby realizing relative fixation of the test head 6 and the sensor 3, and the sensor 3 is fixed to the fixing seat 2 at equal angles by a first screw 201.

[0056] In the example, as shown in Figure 5, at least one pair of sensor positioning plates 5 are provided on the upper surface of the mounting block 1, and at least one pair of the sensor positioning plates 5 are symmetrically arranged about the axis of the fixing seat 2, and are attached and fixed to the surface of the sensor 3. It should be further pointed out that the sensor positioning plate 5 is an arc-shaped sheet structure, which is fixed to the upper surface of the mounting block 1 by a second screw 502. The outer surface of the arc-shaped sheet structure is a smoothly transitioned arc surface, and the inner surface of the arc-shaped sheet structure is a smooth portion 501 arranged at equal angles, wherein the smooth portion is completely fitted with the outer surface of the sensor to achieve the purpose of limiting, and the sensor positioning plate 5 is used to reduce the radial displacement of the sensor under the pressure of the plum blossom contact, thereby preventing the horizontal displacement of the sensor 3.

[0057] In one embodiment, a dust cover 11 is disposed at the upper end of the mounting block 1 , and an opening for passing the test head 6 is formed on the upper surface of the dust cover 11 .

[0058] In one embodiment, the lower surface of the handle 8 forms an opening communicating with the internal cavity structure 4 thereof, and an end cover 10 is provided at the opening. It should be further pointed out that the end cover 10 is threadedly connected to the lower end of the handle 8 .

[0059] Embodiment 2, as shown in Figures 6 to Figure 7 As shown:

[0060] A detection system using the above plum blossom contact pressure tester comprises the plum blossom contact pressure tester and a data processing and display terminal 14. The plum blossom contact pressure tester transmits detection data to the data processing and display terminal in a wireless manner.

[0061] In one embodiment, the data processing and display terminal 14 includes a housing 1401, a main control MCU 1402 arranged inside the housing 1401, a display screen 1403 arranged on the surface of the housing, a button assembly 1404, and an embedded printer 1405 arranged in the housing 1401 with a printing port exposed.

[0062] Working principle: insert the test head 6 of the sensor assembly into the plum blossom contact to be tested, the plum blossom contact is stretched open, and under the action of the radial elastic deformation contact pressure of the plum blossom contact piece, the test head 7 of each sensor assembly is subjected to the radial elastic deformation contact pressure F of the plum blossom contact piece, and the pressure strain gauge of the corresponding sensor 3 is deformed. With the difference in the deformation amount, the Wheatstone bridge in the strain gauge outputs different voltage signals under the stimulation of the power supply voltage. Using the data processing chip 13, the weak voltage signals of six (or more) signals are amplified through the amplifier circuit, and the analog quantity is converted into digital quantity through the A / D conversion circuit, and then wirelessly transmitted to the main control MCU1402. After the calculation of the main control MCU1402, the pressure of each contact piece of the plum blossom contact, as well as the pressure sum, average value, mean square error, etc. are finally accurately displayed on the display screen 1403, achieving a plug-and-play display effect.

[0063] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0064] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited by the appended claims.

Claims

1. A plum blossom contact pressure tester, comprising a handle, wherein a cavity structure is formed inside the handle, characterized in that: The plum blossom contact pressure tester also includes: A data transmission component is disposed in the cavity structure of the handle; At least one pair of sensor components, respectively connected to the input end of the data transmission component; a plurality of the sensor components are arranged at equal angles on the upper end of the handle through the connecting component; The sensor assembly includes a test head and a sensor, wherein: The test head is connected to the sensor via a test head fixing piece; The connecting assembly comprises a mounting block and a fixing seat, wherein the mounting block is arranged at the upper end of the handle, and the lower end of the fixing seat passes through the mounting block and is inserted into the cavity structure of the handle; A pair of sensors in each sensor assembly is mounted at equal angles on the side surface of the fixing base; The upper surface of the mounting block is provided with at least one pair of sensor positioning pieces, and the at least one pair of sensor positioning pieces are symmetrically arranged about the axis of the fixing seat and are attached and fixed to the surface of the sensor. The sensor positioning sheet is an arc-shaped sheet structure, which is fixed to the upper surface of the mounting block by a second screw. The outer surface of the arc-shaped sheet structure is a smoothly transitioned arc surface, and the inner surface of the arc-shaped sheet structure includes smooth portions set at equal angles, wherein the smooth portions are completely fitted with the outer surface of the sensor to achieve the purpose of limiting. The sensor positioning sheet is used to reduce the radial deviation of the sensor under the pressure of the plum blossom contact, thereby preventing horizontal displacement of the sensor.

2. The plum blossom contact pressure tester according to claim 1, characterized in that: The data transmission component includes at least two data processing chips and a power supply; At least two of the data processing chips are respectively connected in parallel to the power supply, at least the two data processing chips are arranged in the upper part of the cavity structure of the handle, and the power supply is arranged in the lower part of the cavity structure of the handle.

3. The plum blossom contact pressure tester according to claim 2, characterized in that: A dust cover is provided at the upper end of the mounting block, and an opening for passing the detection head is formed on the upper surface of the dust cover.

4. The plum blossom contact pressure tester according to claim 1, characterized in that: An opening communicating with the internal cavity structure of the handle is formed on the lower surface of the handle, and an end cover is provided at the opening.

5. The plum blossom contact pressure tester according to claim 4, characterized in that: Also includes: The data processing display terminal comprises a shell, a main control MCU arranged inside the shell, a display screen arranged on the surface of the shell, a key assembly, and an embedded printer arranged in the shell with a print port exposed.

6. A detection system using the plum blossom contact pressure tester according to any one of claims 1 to 5, characterized in that: The detection system comprises the plum blossom contact pressure tester and a data processing and display terminal. The plum blossom contact pressure tester transmits detection data to the data processing and display terminal in a wireless manner.

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