Accelerometer package-lead terminal impedance testing apparatus and method

Abstract

The application provides an accelerometer shell-lead terminal impedance test device and test method, which comprises a negative instantaneous terminal, a lower mounting body, an upper mounting body, an impedance test integrated box and a positive instantaneous terminal. The accelerometer to be detected is mounted on the upper mounting body, the upper mounting body is mounted on the lower mounting body, the lower mounting body is mounted on the negative instantaneous terminal, the negative instantaneous terminal is provided with a number of telescopic negative probes equal to the number of the accelerometer to be detected, and the negative probes are located at positions corresponding to the bottom of each accelerometer to be detected. The positive instantaneous terminal is provided with a terminal clamping test hole matched with the lead terminal of the accelerometer to be detected, the positive instantaneous terminal is mounted on the upper side of the inside of the impedance test integrated box, and the negative instantaneous terminal is mounted on the lower side of the inside of the impedance test integrated box. The application can effectively improve the impedance test efficiency, greatly reduce the labor intensity, significantly improve the test accuracy and the automation degree of the accelerometer test process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of testing, and particularly relates to a device and a method for testing impedance between an accelerometer shell and a lead terminal. BACKGROUND

[0002] The lead terminal of an accelerometer is used to obtain output information of the accelerometer, and is an indispensable output interface for determining normal work of the accelerometer. The shell is theoretically insulated from the lead terminal, and whether the shell and the lead terminal are insulated directly affects use of the accelerometer. At present, after assembly of the accelerometer is completed, impedance between multiple lead terminals of each accelerometer and the shell of the accelerometer must be manually tested. Since each lead terminal of the accelerometer is usually more than 10, and each has a diameter of 1 mm and is spaced apart by less than 4 mm, during manual testing of impedance between the lead terminals and the shell, it is necessary to ensure that each lead terminal and the shell are accurately connected, impedance test excitation is accurately applied, and impedance data is correctly read, which is laborious and prone to repeated testing and inaccurate testing, and may cause unqualified products to be mixed into qualified products, thereby causing subsequent serious problems. Furthermore, usually hundreds of accelerometers need to be tested at a time, and each accelerometer needs to be tested, which is time-consuming and labor-consuming. SUMMARY

[0003] The application aims to overcome the deficiencies in the prior art, and provides a device and a method for testing impedance between an accelerometer shell and a lead terminal. The application can solve the problems in the prior art.

[0004] The technical solution of the application is as follows:

[0005] According to a first aspect, a device for testing impedance between an accelerometer shell and a lead terminal is provided, which comprises a negative instantaneous measuring terminal, a lower mounting body, an upper mounting body, an impedance test integrated box, and a positive instantaneous measuring terminal. An accelerometer to be detected is mounted on the upper mounting body, the upper mounting body is mounted on the lower mounting body, the accelerometer to be detected is fixed by the upper and lower mounting bodies, the lower mounting body is mounted on the negative instantaneous measuring terminal, a number of telescopic negative probes equal to that of the accelerometers to be detected are arranged on the negative instantaneous measuring terminal and located at positions corresponding to the bottom of each accelerometer to be detected, the number of the positive instantaneous measuring terminal is equal to that of the accelerometers to be detected, and terminal clamping test holes matched with the lead terminals of the accelerometers to be detected are arranged on the positive instantaneous measuring terminal, the positive instantaneous measuring terminal is mounted on the inner upper side of the impedance test integrated box, and the negative instantaneous measuring terminal is mounted on the inner lower side of the impedance test integrated box.

[0006] Further, the negative instantaneous terminal is a groove structure, and a plurality of telescopic negative probes are uniformly distributed on the negative instantaneous terminal, and the negative probes are connected to an external power supply through wires.

[0007] Preferably, the negative instantaneous terminal is provided with two sides of slide on the two sides of the impedance test integrated box.

[0008] Preferably, the negative instantaneous terminal is provided with a handle on one side and the other side is the throwing end of the wire.

[0009] Further, the lower mounting body is provided with through holes corresponding to the outer diameter of the negative pole of the accelerometer to be detected, the through holes are coaxial with the negative probe, and the number of the through holes is equal to the number of the negative probe.

[0010] Preferably, the lower mounting body is provided with positioning devices and direction recognition devices, the positioning devices fix the relative positions of the lower mounting body, the upper mounting body and the negative instantaneous terminal, and the direction recognition devices ensure that the directions of the lower mounting body and the upper mounting body are the same.

[0011] Further, the upper mounting body is provided with special-shaped through holes, the special-shaped through holes match the shape of the flange structure of the accelerometer to be detected, the special-shaped through holes are coaxial with the through holes on the lower mounting body, and the number of the special-shaped through holes is the same as that of the through holes on the lower mounting body.

[0012] Further, the upper mounting body is provided with corresponding positioning devices and direction recognition devices on the lower mounting body.

[0013] Preferably, the positioning devices are wedge-shaped bodies on the edges of the upper mounting body and the lower mounting body, and the direction recognition devices are direction grooves processed on the edges of the upper mounting body and the lower mounting body.

[0014] Further, the impedance test integrated box is a box body including four sides, which integrates a hydraulic propulsion device, an impedance excitation device, a data recognition device and a screen display operation device, the hydraulic propulsion device is connected with the positive instantaneous test terminal to control the up-down movement of the positive instantaneous test terminal, the impedance excitation device provides excitation for the detection of the accelerometer to be detected and displays, the data recognition device recognizes the data of the impedance excitation device and transmits it to the screen display operation device, the screen display operation device displays the test results of the accelerometer and inputs control parameters of the hydraulic propulsion device and the impedance excitation device.

[0015] Further, the positive instantaneous test terminal includes a test terminal and a push rod, the push rod is connected with the hydraulic propulsion device, the test terminal is provided with a plurality of terminal clamping test holes, and the push rod drives the up-down movement of the terminal clamping test holes.

[0016] Preferably, the positive instant terminal clamps the test hole diameter larger than the lead terminal diameter.

[0017] According to the second aspect, the above-mentioned method for testing the impedance between the accelerometer shell and the lead terminal is provided, comprising the following steps:

[0018] Placing the accelerometer to be tested in the upper mounting body;

[0019] Mounting the upper mounting body in the lower mounting body;

[0020] Mounting the lower mounting body in the negative instant terminal;

[0021] Mounting the negative instant terminal in the impedance test integrated box;

[0022] Lowering the positive instant terminal to cover the lead terminal of the accelerometer to be tested and clamping the lead terminal;

[0023] Applying excitation to turn on the accelerometer shell and each lead terminal, and simultaneously testing the impedance between the shell and multiple lead terminals of multiple accelerometers;

[0024] Determining the impedance between the shell and multiple lead terminals of each accelerometer through the impedance test integrated box, and testing whether the accelerometer is qualified.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] The present application can simultaneously test the impedance between the shell and multiple lead terminals of multiple accelerometers, effectively improve the impedance test efficiency, greatly reduce the labor intensity, and significantly improve the test accuracy and the automation degree of the accelerometer test process. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings included to provide a further understanding of the embodiments of the present application, constitute a part of the specification and serve to explain the principles of the present application. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0028] Figure 1 A method for testing the impedance between the accelerometer shell and the lead terminal is shown according to the embodiment of the present application;

[0029] Figure 2 A schematic diagram of an impedance test device for the accelerometer shell and the lead terminal is shown according to the embodiment of the present application;

[0030] Figure 3Fig. 1 shows a schematic diagram of a negative instantaneous terminal according to an embodiment of the present application;

[0031] Figure 4 Fig. 2 shows a schematic diagram of a lower mounting bracket according to an embodiment of the present application;

[0032] Figure 5 Fig. 3 shows a schematic diagram of an upper mounting bracket according to an embodiment of the present application;

[0033] Figure 6 Fig. 4 shows a schematic diagram of a positive instantaneous terminal according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0035] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the example embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and values shown in these embodiments do not limit the scope of the present application. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification, if appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of example embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] As Figure 1As shown, according to the embodiment of the first aspect of the application, the device for testing the impedance of the accelerometer shell and lead terminal comprises a negative instantaneous terminal, a lower mounting body, an upper mounting body, an impedance test integrated box and a positive instantaneous terminal. The accelerometer to be tested is mounted on the upper mounting body, and the upper mounting body is mounted on the lower mounting body. The accelerometer to be tested is fixed through the upper and lower mounting bodies. The lower mounting body is mounted on the negative instantaneous terminal. The negative instantaneous terminal is provided with a plurality of telescopic negative probes equal in number to the accelerometers to be tested, which are located at positions corresponding to the bottom of each accelerometer shell to be tested. The number of the positive instantaneous terminal is equal to the number of the accelerometers to be tested. The positive instantaneous terminal is provided with terminal clamping test holes matched with the lead terminals of the accelerometers to be tested. The positive instantaneous terminal is mounted on the upper side of the inside of the impedance test integrated box, and the negative instantaneous terminal is mounted on the lower side of the inside of the impedance test integrated box.

[0038] Further, in an embodiment, the negative instantaneous terminal is a groove structure, and a plurality of telescopic negative probes are uniformly distributed. The negative probes are connected to an external power supply through wires. The telescopic negative probes are retracted when the lower mounting body is mounted and removed, facilitating the removal of the lower mounting body. After the lower mounting body is mounted, the telescopic negative probes are extended to contact the negative electrodes of the accelerometers to be tested.

[0039] Preferably, in an embodiment, the two sides of the negative instantaneous terminal matched with the impedance test integrated box are provided with sliding channels. The sliding channels are matched with the sliding rails in the impedance test integrated box, facilitating the entry and exit of the negative instantaneous terminal in the impedance test integrated box.

[0040] Preferably, in an embodiment, the two sides of the negative instantaneous terminal are not provided with sliding channels. One side is provided with a handle, facilitating the entry and exit of the negative instantaneous terminal in the impedance test integrated box. The other side is the outlet end of the negative probe wire.

[0041] Further, in an embodiment, the lower mounting body is a structure matched with the groove in the negative instantaneous terminal. The lower mounting body is provided with through holes matched with the outer diameters of the negative electrodes of the accelerometers to be tested. The through holes are coaxial with the negative probes, and the number of the through holes is equal to the number of the negative probes. Through the plurality of through holes and negative probes, a plurality of accelerometers to be tested can be tested simultaneously. Preferably, in an embodiment, the inner diameter of the through hole is larger than the outer shape of the corresponding end of the negative electrode of the accelerometer to be tested, preventing the accelerometer to be tested from colliding with the through hole.

[0042] Preferably, in an embodiment, the lower mounting body is provided with a positioning device and a direction recognition device. The positioning device fixes the relative positions of the lower mounting body, the upper mounting body and the negative instantaneous terminal. The direction recognition device ensures that the directions of the lower mounting body and the upper mounting body are the same.

[0043] Further, in one embodiment, the upper mounting body is shaped to match the shape of the lower mounting body, and the upper mounting body is provided with a plurality of shaped holes, the shaped holes and the flange structure of the accelerometer to be tested match in shape, the shaped holes and the upper holes of the lower mounting body are coaxially arranged, and the number of the shaped holes is the same as the number of the upper holes of the lower mounting body. Preferably, in one embodiment, the inner diameter of the shaped holes is larger than the outer shape of the flange structure of the accelerometer to be tested, so as to prevent the accelerometer to be tested from colliding therewith.

[0044] Further, in one embodiment, the upper mounting body is provided with corresponding positioning devices and direction recognition devices on the lower mounting body.

[0045] Preferably, in one embodiment, the positioning devices are wedge-shaped bodies on the edges of the upper mounting body and the lower mounting body, and the direction recognition devices are direction grooves processed on the edges of the upper mounting body and the lower mounting body.

[0046] Further, in one embodiment, the impedance test integrated box is a box body including four faces, and is integrated with a hydraulic propulsion device, an impedance excitation device, a data recognition device, and a screen display operation device. The hydraulic propulsion device is connected with the positive instantaneous test end to control the up-and-down movement of the positive instantaneous test end. The impedance excitation device provides excitation and display for the test of the accelerometer to be tested. The data recognition device recognizes the data of the impedance excitation device and transmits the data to the screen display operation device. The screen display operation device displays the test results of the accelerometer and inputs control parameters for the hydraulic propulsion device and the impedance excitation device. Preferably, in one embodiment, the hydraulic propulsion device is a precise hydraulic propulsion device, the impedance excitation device is a multichannel excitation device 8508A digital voltmeter, the data recognition device is an RS-232 serial output, and the screen display operation device includes a display screen and a keyboard.

[0047] Further, in one embodiment, the positive instantaneous test end includes a test end and a pushing rod, the pushing rod is connected with the hydraulic propulsion device, and the test end is provided with a plurality of terminal clamping test holes. The pushing rod drives the up-and-down movement of the terminal clamping test holes to cover the lead terminals of the accelerometer to be tested. Preferably, in one embodiment, the terminal clamping test holes of the positive instantaneous test end are provided with a diameter larger than the diameter of the lead terminals to ensure that the terminal clamping test holes clamp the lead terminals. Preferably, in one embodiment, the positive instantaneous test end is made of an insulating material.

[0048] According to a second aspect, a method for testing the impedance of the lead terminals of an accelerometer shell is provided, and the method includes the following steps:

[0049] Step one, placing the accelerometer to be tested in the upper mounting body;

[0050] Step two, mounting the upper mounting body in the lower mounting body;

[0051] Step three, install the lower mounting bracket in the negative instantaneous test end;

[0052] Step four, install the negative instantaneous test end in the impedance test integrated box;

[0053] Step five, lower the positive instantaneous test end to cover the lead terminals of the accelerometer to be tested and clamp the lead terminals;

[0054] Step six, apply excitation, connect the accelerometer shell to each lead terminal, and simultaneously test the impedance of the shell to multiple lead terminals of a plurality of accelerometers;

[0055] Step seven, determine the impedance between the shell and the multiple lead terminals of each accelerometer through the impedance test integrated box, and detect whether the accelerometer is qualified.

[0056] Preferably, in one embodiment, multiple sets of upper mounting brackets are prepared, and multiple groups of accelerometers are placed before being loaded, so as to speed up the test.

[0057] In order to have a further understanding of the accelerometer shell and lead terminal impedance test device provided by the application, specific examples and drawings are used for detailed description.

[0058] An accelerometer shell and lead terminal impedance test device is described by taking the simultaneous test of nine accelerometers to be tested as an example.

[0059] As shown in Figure 2 , the accelerometer shell and lead terminal impedance test device comprises a negative instantaneous test end 1, a lower mounting bracket 2, an upper mounting bracket 3, an impedance test integrated box 4, a positive instantaneous test end 5, an accelerometer shell 6, and a lead terminal 7. As shown in Figure 3 , the negative instantaneous test end 1 is of a square groove type structure, uniformly distributes nine telescopic negative probes 11, and is provided with positioning slides 15 on two opposite sides, has a push handle 16 on one side, and is provided with a cable throwing end 14 on the other side; as shown in Figure 4 , the lower mounting bracket 2 is of a square structure provided with nine through holes 24, is provided with wedge-shaped grooves 25 on the four corners of the periphery, and is provided with direction identification grooves 21 on two opposite sides; as shown in Figure 5 , the upper mounting bracket 3 is of a square structure provided with nine special-shaped through holes 34, is provided with wedge-shaped bodies 35 on the four corners of the periphery, and is provided with direction identification grooves 31 on two opposite sides; as shown in Figure 6 , the positive instantaneous test end 5 comprises a test end 52 and a push rod 51, and is of a cylindrical structure, and the test end is provided with a plurality of terminal clamping test holes 53.

[0060] The impedance test integrated box 4 is integrated by a precise hydraulic propulsion device, a multichannel excitation device 8508A, a voltmeter, an RS-232 serial output, and a screen display operation device;

[0061] The telescopic negative probe 11, the through hole 24 and the special-shaped through hole 34 are installed on the same straight line (L12, L22 and L32 are equal, and L13, L23 and L33 are equal), that is, coaxial at the corresponding positions of each telescopic negative probe 11 on the negative instantaneous measuring end 1, each through hole 24 on the lower mounting bracket 2 and each special-shaped through hole 34 on the upper mounting bracket 3;

[0062] The negative instantaneous measuring end 1 and the lower mounting bracket 2 are accurately positioned and installed through the wedge-shaped structure;

[0063] The direction identification grooves 21 on the lower mounting bracket 2 and the direction identification grooves 31 on the upper mounting bracket 3 are one-to-one corresponding in position, ensuring direction identification;

[0064] The wedge-shaped grooves 25 on the lower mounting bracket 2 and the wedge-shaped bodies 35 on the upper mounting bracket 3 are one-to-one corresponding in position, ensuring accurate positioning;

[0065] The diameter of the through hole 24 on the lower mounting bracket 2 is greater than that of the accelerometer shell 6, so that after installation, it is ensured that the shell 6 will not be contacted;

[0066] The special-shaped through hole 34 on the upper mounting bracket 3 should form a hole shaft gap with the accelerometer shell 6, so that after installation, it is ensured that the lower mounting bracket 2 will not be contacted with the shell 6;

[0067] The diameter of the terminal clamping test hole 53 on the positive instantaneous measuring end 5 is greater than that of the lead terminal 7, so that when the hydraulic expander 51 covers the lead terminal 7, the lead terminal 7 can be clamped.

[0068] An accelerometer shell and lead terminal impedance test method, comprising the following steps:

[0069] Step S101, place the impedance test integrated box on a horizontal table top;

[0070] Step S102, slide the negative instantaneous measuring end from the initial state along the positioning slide from the test integrated box to the lower mounting bracket;

[0071] The initial state refers to the state that after the accelerometer is installed, the negative instantaneous measuring end slides along the positioning slide into the test integrated box to the maximum depth, all telescopic negative probes are elongated to contact the corresponding accelerometer shell, all positive instantaneous measuring ends cover the lead terminal, and the terminal clamping test hole clamps the corresponding lead terminal.

[0072] The positioning slide, the wedge-shaped body, the direction identification groove and the hole position ensure the realization of the initial state. The positioning slide determines the position relationship between the negative instantaneous test end and the impedance test integrated box, and also determines the position relationship between the negative instantaneous test end and the positive instantaneous test end. The wedge-shaped body and the direction identification groove determine the position relationship between the negative instantaneous test end, the lower installation support body and the upper installation support body. The hole position of the upper installation support body determines the positioning and installation of the accelerometer, and the position relationship between the accelerometer lead terminal and the positive instantaneous test end.

[0073] In step S103, a plurality of accelerometers are placed in the upper installation support body in sequence, and the accelerometers are loaded into the lower installation support body through wedge-shaped positioning, so that the bottom end of the accelerometer shell is connected to the test integrated box through the telescopic negative probe, and then the negative instantaneous test end is returned to the initial state.

[0074] In step S104, the hydraulic extender is started to cover the positive test end with the accelerometer lead terminal, and then the terminal clamps the lead terminal.

[0075] In step S105, the excitation is applied to connect the accelerometer shell and the lead terminals, and the impedance of the plurality of lead terminals of the plurality of accelerometers to the shell is tested at one time.

[0076] In step S106, the data is identified, the impedance between the shell and the plurality of lead terminals of each accelerometer is determined through the impedance test integrated box, and the unqualified accelerometer is determined.

[0077] In summary, the accelerometer shell and lead terminal impedance test device and method provided by the application have at least the following advantages compared with the prior art:

[0078] The application can test the impedance of the plurality of lead terminals of the plurality of accelerometers to the shell at one time, effectively improve the impedance test efficiency, greatly reduce the labor intensity, significantly improve the test accuracy and the automation degree of the accelerometer test process.

[0079] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0080] In addition, it should be pointed out that the use of "first", "second" and the like words to define parts, only for the convenience of the corresponding parts to be distinguished, as no further declaration, the above words have no special meaning, therefore can not be understood as limiting the scope of the present application.

[0081] The above only for the preferred embodiments of the present application, and is not intended to limit the present application, for those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. An apparatus for testing an accelerometer package and lead terminals, comprising: a test fixture having a plurality of test pins; a plurality of test probes; a plurality of test sockets; and a plurality of test leads. The device includes a negative instantaneous test terminal, a lower mounting bracket, an upper mounting bracket, an impedance testing integrated box, and a positive instantaneous test terminal. The accelerometer to be tested is mounted on the upper mounting bracket, and the upper mounting bracket is mounted on the lower mounting bracket. The accelerometer to be tested is fixed by the upper and lower mounting brackets. The lower mounting bracket is mounted on the negative instantaneous test terminal. The negative instantaneous test terminal is equipped with a number of telescopic negative probes equal to the number of accelerometers to be tested, located at corresponding positions on the bottom of the housing of each accelerometer to be tested. The number of positive instantaneous test terminals is equal to the number of accelerometers to be tested. Terminal clamping test holes matching the lead terminals of the accelerometers to be tested are installed on the positive instantaneous test terminals. The positive instantaneous test terminals are installed on the upper inner side of the impedance testing integrated box, and the negative instantaneous test terminals are installed on the lower inner side of the impedance testing integrated box.

2. The apparatus for testing the impedance of an accelerometer package and lead terminals according to claim 1, wherein, The negative electrode instantaneous measurement terminal has a groove-shaped structure with multiple retractable negative electrode probes evenly distributed on it. The negative electrode probes are connected to an external power source via wires.

3. The apparatus for testing the impedance of an accelerometer package and lead terminals according to claim 1, wherein, The lower mounting bracket is a structure that matches the inner groove of the negative electrode instantaneous measurement end. It is provided with a through hole that matches the outer diameter of the corresponding end of the negative electrode of the accelerometer to be tested. The through hole is coaxial with the negative electrode probe, and the number of the through holes is equal to the number of the negative electrode probe.

4. The apparatus for testing the impedance of an accelerometer package and lead terminals according to claim 3, wherein, The shape of the upper mounting bracket matches the shape of the lower mounting bracket, and an irregularly shaped through hole is provided on it. The irregularly shaped through hole matches the shape of the flange structure of the accelerometer to be tested. The irregularly shaped through hole and the through hole on the lower mounting bracket are coaxially arranged, and the number of the irregularly shaped through hole is the same as the number of the through hole on the lower mounting bracket.

5. The apparatus for testing the impedance of an accelerometer package and lead terminals according to claim 4, wherein, The upper mounting bracket is equipped with a positioning device and a direction recognition device that correspond to those on the lower mounting bracket.

6. The apparatus for testing the impedance of an accelerometer package and lead terminals of claim 1, wherein, The impedance testing integrated box comprises a four-sided enclosure, integrating a hydraulic propulsion device, an impedance excitation device, a data recognition device, and a screen display operation device. The hydraulic propulsion device is connected to the positive instantaneous measurement terminal and controls its up-and-down movement. The impedance excitation device provides excitation for the accelerometer under test and displays the result. The data recognition device identifies the data from the impedance excitation device and transmits it to the screen display operation device. The screen display operation device displays the accelerometer test result and inputs control parameters for the hydraulic propulsion device and the impedance excitation device.

7. The apparatus for testing the impedance of an accelerometer package and lead terminals according to claim 1, wherein, The positive electrode instantaneous test terminal includes a test end and a push rod. The push rod is connected to the hydraulic propulsion device. The test end is provided with a plurality of terminal clamping test holes. The push rod drives the terminal clamping test holes to move up and down.

8. The apparatus for testing the impedance of an accelerometer package and lead terminals of claim 1, wherein, The diameter of the clamping test hole on the positive instantaneous test terminal is larger than the diameter of the lead terminal.

9. The apparatus for testing the impedance of an accelerometer package and lead terminals of claim 5, wherein, The positioning device is a wedge-shaped body on the edge of the upper mounting bracket and the lower mounting bracket, and the direction recognition device is a direction groove machined on the edge of the upper mounting bracket and the lower mounting bracket.

10. The method of claim 1-9, wherein, The method includes the following steps: Place the accelerometer to be tested in the upper mounting bracket; Install the upper mounting bracket into the lower mounting bracket; Install the lower mounting bracket in the negative electrode instantaneous test terminal; Install the negative electrode instantaneous test terminal in the impedance test integrated box; The positive electrode instantaneous end is lowered to cover the lead terminal of the to-be-tested accelerometer and clamps the lead terminal; The excitation is applied to turn on the accelerometer shell and each lead terminal, and the synchronous test of the impedance of multiple lead terminals of multiple accelerometers to the shell is realized at one time; The impedance between the shell and the multiple lead terminals of each accelerometer is determined through the impedance test integrated box, and whether the accelerometer is qualified is detected.

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