Triaxial acceleration sensor

Abstract

The utility model provides a kind of three-axis acceleration sensor, including base and locking stud being set on base, z direction compression piezoelectric ceramic assembly, y direction shear piezoelectric ceramic assembly, x direction shear piezoelectric ceramic assembly, mass and locking nut are sequentially sleeved on locking stud, x direction shear piezoelectric ceramic assembly is used to measure x axial acceleration, y direction shear piezoelectric ceramic assembly is used to measure y axial acceleration, z direction shear piezoelectric ceramic assembly is used to measure z axial acceleration, x direction, y direction and z direction are perpendicular to each other, the axis of locking stud extends along z direction, multiple-core socket is provided on base, z direction compression piezoelectric ceramic assembly, y direction shear piezoelectric ceramic assembly, x direction shear piezoelectric ceramic assembly are connected to multiple-core socket in parallel;It can satisfy three-axis acceleration detection, can only adopt single mass cooperation locking pressurization, ensure that the stress is consistent, compact structure, small volume, easy to install, high reliability.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a triaxial acceleration sensor. Background Technology

[0002] A triaxial vibration table is a vibration device capable of highly realistically reproducing multi-directional excitations. Its core function is to simultaneously perform precise and controlled vibration simulations of specimens in the vertical direction and two horizontal directions. Real-world vibrations, such as those occurring in vehicle operation, earthquakes, and rocket launches, are never unidirectional but rather superimposed random vibrations in multiple directions. In today's pursuit of ultimate product reliability, triaxial vibration tables have become indispensable key equipment in aerospace, high-end manufacturing, and scientific research fields.

[0003] To reconstruct the true motion trajectory of the vibration table surface or the object under test, vibration data in three directions must be acquired simultaneously. Theoretically, three independent uniaxial sensors can be used, but they cannot be mounted at the same spatial point, and even slight differences in mounting position can introduce significant phase and amplitude errors under high-frequency vibration. Furthermore, using three sensors requires separate mounting surfaces and occupies three data acquisition channels, making the installation process complex and the operation cumbersome.

[0004] Therefore, the triaxial sensor was developed. Its three sensing units are integrated into the same housing and arranged as close as possible to ensure the synchronicity and consistency of data acquisition across the three channels, which is beneficial for accurately analyzing the phase relationship of acceleration in each direction. Only one installation and calibration of the triaxial sensor is needed to simultaneously obtain data from all three directions, which is not only highly efficient but also avoids errors introduced by minor changes in environment and equipment conditions during multiple tests.

[0005] However, while the highly integrated nature of triaxial accelerometers brings advantages such as point consistency, synchronization, and ease of installation, it also has limitations in flexibility. Because it requires the internal arrangement of sensing units in three directions, its structural size is usually larger than that of a single-axis sensor. The excessive size makes it difficult to find a sufficiently large space and a flat surface to install a triaxial sensor in measurement points with extremely limited space, such as narrow bearing seats, thin walls, or small PCB boards. In addition, the mass and volume of the triaxial accelerometer itself may bring a load effect to lightweight specimens or high-frequency vibration experiments, interfering with the actual vibration response and affecting the measurement accuracy. Summary of the Invention

[0006] The purpose of this invention is to provide a triaxial acceleration sensor to solve the above-mentioned problems.

[0007] The technical solution adopted in this utility model is as follows: A triaxial acceleration sensor includes a base and a locking stud mounted on the base. A z-axis compression piezoelectric ceramic component, a y-axis shear piezoelectric ceramic component, an x-axis shear piezoelectric ceramic component, a mass block, and a locking nut are sequentially mounted on the locking stud. The x-axis shear piezoelectric ceramic component measures acceleration along the x-axis, the y-axis shear piezoelectric ceramic component measures acceleration along the y-axis, and the z-axis shear piezoelectric ceramic component measures acceleration along the z-axis. The x, y, and z axes are mutually perpendicular. The axis of the locking stud extends along the z-axis. A multi-pin socket is provided on the base, and the z-axis compression piezoelectric ceramic component, the y-axis shear piezoelectric ceramic component, and the x-axis shear piezoelectric ceramic component are connected in parallel to the multi-pin socket.

[0008] As a further improvement of the present invention, the x-axis shear piezoelectric ceramic assembly includes a common ground conductive sheet, two x-axis piezoelectric ceramic sheets, and an x-axis signal conductive sheet disposed between the two x-axis piezoelectric ceramic sheets. The common ground conductive sheet is used to connect the ground signal of the two x-axis piezoelectric ceramic sheets to the base. The two x-axis piezoelectric ceramic sheets are symmetrically arranged with respect to the x-axis signal conductive sheet. The two x-axis piezoelectric ceramic sheets are polarized along the x-direction and in opposite polarization directions. The x-axis signal conductive sheet is connected to a multi-core socket.

[0009] As a further improvement of this utility model, the structure of the z-direction compression piezoelectric ceramic component is consistent with the structure of the x-direction shear piezoelectric ceramic component, and the two z-direction piezoelectric ceramic sheets are polarized along the z-direction and in opposite directions.

[0010] As a further improvement of this utility model, the y-axis shear piezoelectric ceramic assembly includes two y-axis piezoelectric ceramic sheets and a y-axis signal conductive sheet disposed between the two y-axis piezoelectric ceramic sheets. The two y-axis piezoelectric ceramic sheets are symmetrically arranged with respect to the y-axis signal conductive sheet. The two y-axis piezoelectric ceramic sheets are polarized along the y-direction and in opposite polarization directions. The y-axis signal conductive sheet is connected to a multi-core socket. The ground signals of the two y-axis piezoelectric ceramic sheets are respectively connected to the base through the common ground conductive sheet in the x-axis shear piezoelectric ceramic assembly and the common ground conductive sheet in the z-axis compression piezoelectric ceramic assembly.

[0011] As a further improvement of this utility model, a conductive gasket is provided between the y-direction piezoelectric ceramic sheet and the adjacent common ground conductive sheet.

[0012] As a further improvement of the present invention, the common ground conductive sheet includes a first conductive sheet and a second conductive sheet that are parallel to each other and separately arranged. A connecting piece is provided between the first conductive sheet and the second conductive sheet for connection. Two x-direction piezoelectric ceramic sheets and an x-direction signal conductive sheet are disposed between the first conductive sheet and the second conductive sheet.

[0013] As a further improvement of this utility model, the two ends of the connecting piece are respectively connected to the radial edges of the first conductive piece and the radial edges of the second conductive piece.

[0014] As a further improvement of this utility model, an elastic insulating sleeve is provided on the locking stud, and the elastic insulation extends axially from the base to the mass block.

[0015] As a further improvement of this utility model, a connection hole is provided on the base.

[0016] As a further improvement of the present invention, a housing is provided on the base, and the housing and the base cooperate to form an accommodating space. The locking stud, the z-axis compression piezoelectric ceramic component, the y-axis shear piezoelectric ceramic component, the x-axis shear piezoelectric ceramic component, the mass block and the locking nut are all arranged in the accommodating space.

[0017] The beneficial effects of this utility model are as follows: With the above structure, the triaxial piezoelectric ceramic components stacked together can meet the requirements of triaxial acceleration detection. At the same time, only a single mass block is needed for locking and pressurization, which ensures consistent force. The structure is compact, small in size, easy to install, and highly reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a triaxial accelerometer; Figure 2 This is a schematic diagram of the internal structure of a triaxial accelerometer; Figure 3 This is a cross-sectional view of the triaxial accelerometer along the axis of the locking stud. Figure 4 This is a schematic diagram of the polarization direction of the x-axis shear piezoelectric ceramic; Figure 5 This is a schematic diagram of the installation of the x-axis shear piezoelectric ceramic; Figure 6 This is a schematic diagram of the polarization direction of a y-axis shear piezoelectric ceramic. Figure 7 This is a schematic diagram of the installation of a y-axis shear piezoelectric ceramic. Figure 8 This is a schematic diagram of the polarization direction of the z-axis compressed piezoelectric ceramic; Figure 9 This is a schematic diagram of the installation of the Z-axis compressed piezoelectric ceramic; Figure 10 This is a schematic diagram of the common ground conductive sheet.

[0019] Wherein: 101-base, 102-housing, 103-connecting hole, 2-locking stud, 3-common ground conductive plate, 301-first conductive plate, 302-second conductive plate, 303-connecting plate, 411-x-direction piezoelectric ceramic plate, 412-x-direction signal conductive plate, 421-y-direction piezoelectric ceramic plate, 422-y-direction signal conductive plate, 423-conductive washer, 431-z-direction piezoelectric ceramic plate, 432-z-direction signal conductive plate, 5-mass block, 6-locking nut, 7-multi-core socket, 8-elastic insulating sleeve, 9-wire. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0021] If the description of this utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), then the directions involved need to be defined. For example, "To clearly express the position and direction described in this utility model, the operator of the instrument is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not required.

[0022] A triaxial acceleration sensor, such as Figures 1-3 As shown, the device includes a base 101 and a locking stud 2 mounted on the base 101. A z-axis compression piezoelectric ceramic assembly, a y-axis shear piezoelectric ceramic assembly, an x-axis shear piezoelectric ceramic assembly, a mass block 5, and a locking nut 6 are sequentially mounted on the locking stud 2. The x-axis shear piezoelectric ceramic assembly is used to measure acceleration along the x-axis, the y-axis shear piezoelectric ceramic assembly is used to measure acceleration along the y-axis, and the z-axis compression piezoelectric ceramic assembly is used to measure acceleration along the z-axis. The x, y, and z axes are mutually perpendicular. For ease of understanding, the x-axis can be defined as a direction within the horizontal plane, the y-axis as a direction within the horizontal plane perpendicular to the x-axis, and the z-axis as a direction perpendicular to the horizontal plane.

[0023] The axis of the locking stud 2 extends along the z-direction. The z-direction compression piezoelectric ceramic component is positioned close to the base 101, while the mass block 5 is positioned away from the base 101. The mass block 5 is used to apply pressure to the x-direction shear piezoelectric ceramic component, the y-direction shear piezoelectric ceramic component, and the z-direction compression piezoelectric ceramic component. The locking nut 6 is used to lock the above structures, enhance the preload between the above structures, and improve the tightness of the connection. A multi-core socket 7 is provided on the base 101. The z-direction compression piezoelectric ceramic component, the y-direction shear piezoelectric ceramic component, and the x-direction shear piezoelectric ceramic component are connected in parallel to the multi-core socket 7. The multi-core socket 7 is used to output the charge signal to an external device.

[0024] Furthermore, the locking stud 2 is coaxially arranged with the base 101, and the locking stud 2 extends axially from the end face of the base 101. The locking stud 2 and the base 101 are connected by a thread.

[0025] As one embodiment of this utility model, such as Figures 3-5 As shown, the x-axis shear piezoelectric ceramic assembly includes a common ground conductive sheet 3, two x-axis piezoelectric ceramic sheets 411, and an x-axis signal conductive sheet 412 disposed between the two x-axis piezoelectric ceramic sheets 411. The common ground conductive sheet 3, the x-axis piezoelectric ceramic sheets 411, and the x-axis signal conductive sheet 412 all have through holes that cooperate with locking bolts. The common ground conductive sheet 3 is connected to the two x-axis piezoelectric ceramic sheets 411. The two x-axis piezoelectric ceramic sheets 411 are symmetrically arranged with respect to the x-axis signal conductive sheet 412. The two x-axis piezoelectric ceramic sheets 411 are polarized in the x-direction and have opposite polarization directions. The x-axis signal conductive sheet 412 is connected to a multi-core socket 7. The x-direction signal conductive sheet 412 is used to lead out the charge signal to the multi-core socket 7, and the common ground conductive sheet 3 is used to connect the ground signal of the two x-direction piezoelectric ceramic sheets 411 to the base 101; during installation, the two x-direction piezoelectric ceramic sheets 411 are installed in parallel in reverse, that is, the positive electrode of one x-direction piezoelectric ceramic sheet 411 faces the +x direction, and the positive electrode of the other x-direction piezoelectric ceramic sheet 411 faces the -x direction.

[0026] As one embodiment of this utility model, such as Figure 10As shown, the common ground conductive sheet 3 includes a first conductive sheet 301 and a second conductive sheet 302 that are parallel to each other and separately arranged. A connecting piece 303 is provided between the first conductive sheet 301 and the second conductive sheet 302 for connection. Two x-direction piezoelectric ceramic sheets 411 and an x-direction signal conductive sheet 412 are disposed between the first conductive sheet 301 and the second conductive sheet 302. The common ground conductive sheet 3 connects the two axial ends of the two x-direction shear piezoelectric ceramic sheets that are far apart from each other. The two ends of the connecting piece 303 are respectively connected to the radial edges of the first conductive sheet 301 and the radial edges of the second conductive sheet 302, thereby making room for the installation of the x-direction shear piezoelectric ceramic sheets and the signal conductive sheets. The cross-section of the connecting piece 303 along the axis of the common ground conductive sheet 3 is arc-shaped, and the convex surface of the arc is far away from the axis of the common ground conductive sheet 3, thereby avoiding interference with the x-direction shear piezoelectric ceramic sheets and the signal conductive sheets.

[0027] Furthermore, such as Figure 3 , 8 As shown in Figure 9, the structure of the z-axis compression piezoelectric ceramic assembly is consistent with that of the x-axis shear piezoelectric ceramic assembly. That is, the z-axis compression piezoelectric ceramic assembly includes a common ground conductive sheet 3, two z-axis piezoelectric ceramic sheets 431, and a z-axis signal conductive sheet 432 disposed between the two z-axis piezoelectric ceramic sheets 431. The common ground conductive sheet 3, the z-axis piezoelectric ceramic sheets 431, and the z-axis signal conductive sheet 432 all have through holes that cooperate with locking bolts. The common ground conductive sheet 3 is connected to the two z-axis piezoelectric ceramic sheets 431. The two z-axis piezoelectric ceramic sheets 431 are symmetrically arranged with respect to the z-axis signal conductive sheet 432. The two z-axis piezoelectric ceramic sheets 431 are polarized along the z-direction and have opposite polarization directions. The z-axis signal conductive sheet 432 is connected to the multi-core socket 7. The z-direction signal conductive sheet 432 is used to lead out the charge signal to the multi-core socket 7, and the common ground conductive sheet 3 is used to connect the ground signal of the two z-direction piezoelectric ceramic sheets 431 to the base 101. During installation, the two z-direction piezoelectric ceramic sheets 431 are installed in parallel in reverse, that is, the positive electrode of one z-direction piezoelectric ceramic sheet 431 faces the +z direction, and the positive electrode of the other z-direction piezoelectric ceramic sheet 431 faces the -z direction.

[0028] As one embodiment of this utility model, such as Figure 3 , 6As shown in Figure 7, the y-direction shear piezoelectric ceramic assembly includes two y-direction piezoelectric ceramic sheets 421 and a y-direction signal conductive sheet 422 disposed between the two y-direction piezoelectric ceramic sheets 421. The two y-direction piezoelectric ceramic sheets 421 are symmetrically arranged with respect to the y-direction signal conductive sheet 422. The two y-direction piezoelectric ceramic sheets 421 are polarized in the y-direction and have opposite polarization directions. The ground signals of the two y-direction piezoelectric ceramic sheets 421 are respectively connected to the base 101 through the common ground conductive sheet 3 in the x-direction shear piezoelectric ceramic assembly and the common ground conductive sheet 3 in the z-direction compression piezoelectric ceramic assembly. The y-direction signal conductive sheet 422 is connected to the multi-core socket 7. Furthermore, to enhance the connection tightness, conductive washers 423 are respectively provided between the y-axis shear piezoelectric ceramic component and the x-axis shear piezoelectric ceramic component, and between the y-axis shear piezoelectric ceramic component and the z-axis compression piezoelectric ceramic component. The conductive washers 423, the y-axis piezoelectric ceramic sheet 421, and the y-axis signal conductive sheet 422 all have through holes that mate with the locking bolt. Specifically, the conductive washer 423 is positioned between the y-axis piezoelectric ceramic sheet 421 and its adjacent grounding conductive sheet 3, and abuts against the side of the grounding conductive sheet 3 closest to the y-axis piezoelectric ceramic sheet 421. Because the conductive washer 423 is elastic, the axial preload is increased after the locking nut 6 is tightened, thus enhancing the connection tightness between the grounding conductive sheet 3, the conductive washer 423, and the y-axis piezoelectric ceramic sheet 421. Additionally, a grounding conductive sheet for transmitting ground signals can be added between the conductive washer 423 and its adjacent y-axis piezoelectric ceramic sheet 421.

[0029] The y-direction signal conductive sheet 422 is used to lead out the charge signal to the multi-core socket 7. The two end faces of the conductive washer 423 respectively abut against the y-direction piezoelectric ceramic sheet 421 and the common ground conductive sheet 3. Thus, the ground signal of the y-direction piezoelectric ceramic sheet 421 near the x-direction shear piezoelectric ceramic component is connected to the base 101 through the adjacent conductive washer 423 and the common ground conductive sheet 3. The ground signal of the y-direction piezoelectric ceramic sheet 421 near the z-direction compression piezoelectric ceramic component is connected to the base 101 through the adjacent conductive washer 423 and the common ground conductive sheet 3. During installation, the two y-direction piezoelectric ceramic sheets 421 are installed in parallel in reverse, that is, the positive electrode of one y-direction piezoelectric ceramic sheet 421 faces the +y direction, and the positive electrode of the other y-direction piezoelectric ceramic sheet 421 faces the -y direction.

[0030] An elastic insulating sleeve 8 is fitted onto the locking stud 2. The elastic insulation extends axially from the base 101 to the mass block 5. The elastic insulating sleeve 8 is used to form electrical insulation between the x-axis shear piezoelectric ceramic component and the locking stud 2, between the y-axis shear piezoelectric ceramic component and the locking stud 2, and between the z-axis compression piezoelectric ceramic component and the locking stud 2, thereby achieving insulation between each piezoelectric ceramic sheet and the base 101, and between each signal conductive sheet and the base 101.

[0031] like Figure 1 As shown, a housing 102 is provided on the base 101. The housing 102 and the base 101 cooperate to form an accommodating space. The locking stud 2, the z-axis compression piezoelectric ceramic component, the y-axis shear piezoelectric ceramic component, the x-axis shear piezoelectric ceramic component, the mass block 5, and the locking nut 6 are all disposed in the accommodating space. The housing 102 protects the internal components while improving the airtightness and electromagnetic shielding performance of the triaxial acceleration sensor.

[0032] like Figure 3 As shown, a mounting hole is provided on the housing 102 for mounting a multi-core socket 7. The multi-core socket 7 extends outward from the housing 102 through the mounting hole. Three wires 9 are provided on the multi-core socket 7, which are respectively connected to the x-direction signal conductive plate 412, the y-direction signal conductive plate 422, and the z-direction signal conductive plate 432, thereby leading out the piezoelectric charge signals of the x-direction shear piezoelectric ceramic component, the y-direction shear piezoelectric ceramic component, and the z-direction compression piezoelectric ceramic component to the multi-core socket 7. The common ground signal of the x-direction shear piezoelectric ceramic component, the y-direction shear piezoelectric ceramic component, and the z-direction compression piezoelectric ceramic component is connected to the base 101 through the common ground conductive plate 3, the conductive washer 423, the mass block 5, and the locking stud 2. Specifically, a wiring part is provided on the x-direction signal conductive plate for connecting with the wires. The wiring part extends radially from the x-direction signal conductive plate, and during installation, the wiring part faces the side of the multi-core socket.

[0033] like Figure 3 As shown, a connection hole 103 is provided on the side of the base 101 away from the housing 102. The connection hole 103 is used to fix the base 101 with external fasteners.

[0034] The triaxial acceleration sensor provided by this utility model can meet the triaxial acceleration detection by stacking triaxial piezoelectric ceramic components. At the same time, it can be locked and pressurized by using only a single mass block 5, which ensures the consistency of force. It has a compact structure, small size, is easy to install, and has high reliability.

[0035] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0036] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A triaxial acceleration sensor, characterized in that: The device includes a base (101) and a locking stud (2) mounted on the base (101). A z-axis compression piezoelectric ceramic component, a y-axis shear piezoelectric ceramic component, an x-axis shear piezoelectric ceramic component, a mass block (5), and a locking nut (6) are sequentially mounted on the locking stud (2). The x-axis shear piezoelectric ceramic component is used to measure the acceleration along the x-axis, the y-axis shear piezoelectric ceramic component is used to measure the acceleration along the y-axis, and the z-axis shear piezoelectric ceramic component is used to measure the acceleration along the z-axis. The x, y, and z axes are perpendicular to each other. The axis of the locking stud (2) extends along the z-axis. A multi-core socket (7) is provided on the base (101). The z-axis compression piezoelectric ceramic component, the y-axis shear piezoelectric ceramic component, and the x-axis shear piezoelectric ceramic component are connected in parallel to the multi-core socket (7).

2. The triaxial acceleration sensor according to claim 1, characterized in that: The x-direction shear piezoelectric ceramic assembly includes a common ground conductive sheet (3), two x-direction piezoelectric ceramic sheets (411), and an x-direction signal conductive sheet (412) disposed between the two x-direction piezoelectric ceramic sheets (411). The common ground conductive sheet (3) is used to connect the ground signal of the two x-direction piezoelectric ceramic sheets (411) to the base (101). The two x-direction piezoelectric ceramic sheets (411) are symmetrically arranged with respect to the x-direction signal conductive sheet (412). The two x-direction piezoelectric ceramic sheets (411) are polarized in the x-direction and the polarization directions are opposite. The x-direction signal conductive sheet (412) is connected to a multi-core socket (7).

3. The triaxial acceleration sensor according to claim 2, characterized in that: The structure of the z-direction compression piezoelectric ceramic component is the same as that of the x-direction shear piezoelectric ceramic component. The two z-direction piezoelectric ceramic sheets (431) are polarized along the z-direction and in opposite directions.

4. The triaxial acceleration sensor according to claim 3, characterized in that: The y-direction shear piezoelectric ceramic assembly includes two y-direction piezoelectric ceramic sheets (421) and a y-direction signal conductive sheet (422) disposed between the two y-direction piezoelectric ceramic sheets (421). The two y-direction piezoelectric ceramic sheets (421) are symmetrically arranged with respect to the y-direction signal conductive sheet (422). The two y-direction piezoelectric ceramic sheets (421) are polarized along the y direction and have opposite polarization directions. The y-direction signal conductive sheet (422) is connected to a multi-core socket (7). The ground signals of the two y-direction piezoelectric ceramic sheets (421) are connected to the base (101) through the common ground conductive sheet (3) in the x-direction shear piezoelectric ceramic assembly and the common ground conductive sheet (3) in the z-direction compression piezoelectric ceramic assembly, respectively.

5. The triaxial acceleration sensor according to claim 4, characterized in that: A conductive gasket (423) is provided between the y-direction piezoelectric ceramic sheet (421) and the adjacent ground conductive sheet (3).

6. The triaxial acceleration sensor according to claim 5, characterized in that: The common ground conductive sheet (3) includes a first conductive sheet (301) and a second conductive sheet (302) that are parallel to each other and separately arranged. A connecting piece (303) is provided between the first conductive sheet (301) and the second conductive sheet (302) for connection. Two x-direction piezoelectric ceramic sheets (411) and x-direction signal conductive sheets (412) are disposed between the first conductive sheet (301) and the second conductive sheet (302).

7. The triaxial acceleration sensor according to claim 6, characterized in that: The two ends of the connecting piece (303) are respectively connected to the radial edge of the first conductive piece (301) and the radial edge of the second conductive piece (302).

8. The triaxial acceleration sensor according to claim 1, characterized in that: An elastic insulating sleeve (8) is fitted on the locking stud (2), and the elastic insulation extends axially from the base (101) to the mass block (5).

9. The triaxial acceleration sensor according to claim 1, characterized in that: A connection hole (103) is provided on the base (101).

10. The triaxial acceleration sensor according to claim 1, characterized in that: A housing (102) is provided on the base (101). The housing (102) and the base (101) cooperate to form an accommodating space. The locking stud (2), the z-axis compression piezoelectric ceramic component, the y-axis shear piezoelectric ceramic component, the x-axis shear piezoelectric ceramic component, the mass block (5), and the locking nut (6) are all disposed in the accommodating space.

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