Ultra-wide temperature acceleration sensor and preparation method thereof

Abstract

The present invention provides an ultra-wide temperature acceleration sensor and a preparation method thereof, including a piezoelectric sensitive unit and a cable assembly connected to the piezoelectric sensitive unit, wherein the piezoelectric sensitive unit includes a core assembly, a base, an outer cover, a mass block, a thermal stress ring, a preload ring and a piezoelectric sensitive assembly. The present invention adds a thermal stress ring to the design of the sensitive assembly to ensure a wider operating temperature, and the stacking part of the piezoelectric crystal uses two lead sheets to connect all the piezoelectric sheets in parallel as a group of piezoelectric sensitive assemblies, further improving the stability of the sensor electrical signal output. The present invention has the characteristics of wide temperature range, strong radiation resistance, corrosion resistance, good sealing, high reliability, fast response, good sealing, wide working temperature range, reliable working temperature span of not less than 800°C, low temperature working point can reach below ‑190°C, and high temperature working point can reach above 600°C, and can be applied to military and civilian fields such as nuclear energy, aerospace or aviation.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to an ultra-wide temperature acceleration sensor and a preparation method thereof. Background Art

[0002] Acceleration measurement is an important indicator that needs to be monitored under various working conditions, and its index parameters are important conditions for judging the system working conditions and environmental adaptability. There are many types of accelerometers, and they are widely used in various large-scale test systems. However, under certain extreme temperature conditions, especially under continuous wide temperature range conditions, accurate acceleration measurement has always been a difficulty.

[0003] The stable operating temperature range of the old piezoelectric acceleration sensor is relatively narrow, usually between -80℃ and +160℃. When the operating temperature range is exceeded, the sensor is prone to failure of the piezoelectric crystal or damage of the cable, which leads to failure of the entire device. The ultra-wide temperature acceleration sensor in the present invention has better reliability, stability and adaptability than the old sensor under extreme wide temperature range conditions. Summary of the invention

[0004] The present invention is to solve the problem of narrow operating temperature range of acceleration sensor, and provide an ultra-wide temperature acceleration sensor and its preparation method. The piezoelectric sensitive component includes a core component, a base, a preload ring, a mass block, a thermal stress ring, an insulating ceramic, a lead sheet and a piezoelectric crystal. The core component is a piezoelectric crystal that can work reliably under wide temperature range conditions. The cable assembly adopts an armored cable encapsulated with metal oxide powder, and is directly welded to the sensor base to ensure the overall sealing. The acceleration sensor has the characteristics of wide applicable temperature range, strong radiation resistance, corrosion resistance, good sealing, etc. The sensor has the characteristics of high reliability, fast response, good sealing, wide operating temperature range, etc. It can be applied to military and civilian fields such as nuclear energy, aerospace or aviation.

[0005] The present invention provides an ultra-wide temperature acceleration sensor, comprising a piezoelectric sensitive unit and a cable assembly connected to the piezoelectric sensitive unit, wherein the piezoelectric sensitive unit and the cable assembly are both sealed structures, the connection between the piezoelectric sensitive unit and the cable assembly is sealed, and the piezoelectric sensitive unit and the cable assembly are applicable to the same ambient temperature range;

[0006] The piezoelectric sensitive unit includes a core assembly, a base fixed on the outside of the core assembly, an outer cover arranged above the base and outside the core assembly, a mass block arranged inside the outer cover and on the upper part of the core assembly, a thermal stress ring arranged in the middle of the mass block, a pre-tightening ring arranged on the upper part of the thermal stress ring and in the middle of the mass block, and a piezoelectric sensitive assembly arranged between the mass block and the core assembly. The connection between the core assembly and the base is sealed, and the connection between the base and the outer cover is sealed. The core assembly is used to support and fix the mass block, the thermal stress ring, the pre-tightening ring and the piezoelectric sensitive assembly. The thermal stress ring is used to absorb the thermal stress generated by the mass block so that the piezoelectric sensitive assembly can output stably at both high and low temperatures. The pre-tightening ring is used to compress the mass block, the thermal stress ring and the piezoelectric sensitive assembly. The piezoelectric sensitive assembly is used to convert the acceleration signal into an electrical signal and output it through a cable assembly.

[0007] The ultra-wide temperature acceleration sensor described in the present invention is, as a preferred embodiment, a piezoelectric sensitive component includes lead sheets arranged alternately up and down, piezoelectric crystals and insulating ceramics arranged above the top lead sheet and below the bottom lead sheet, the number of insulating ceramics is at least 2, the lead sheets are of a parallel structure, the insulating ceramic located at the upper part is arranged below the bottom of the mass block, and the insulating ceramic located at the lower part is arranged above the core base.

[0008] The ultra-wide temperature acceleration sensor described in the present invention is, as a preferred embodiment, a core assembly includes a base and a core arranged in the center of the upper part of the base, the core is a rod-shaped structure, the mass block, thermal stress ring, preload ring, and piezoelectric sensitive component all pass through the core, and the preload ring is fixed to the upper end of the core by threads and then welded and fused.

[0009] In the ultra-wide temperature acceleration sensor described in the present invention, as a preferred embodiment, the bottom of the piezoelectric sensitive component is arranged on the core base, and the core is located at the center of the piezoelectric sensitive component.

[0010] In the ultra-wide temperature range acceleration sensor described in the present invention, as a preferred embodiment, the base and the core are of an integrated structure or are fixed by welding or threaded connection.

[0011] The ultra-wide temperature acceleration sensor described in the present invention is preferably configured such that the core assembly, outer cover, mass block, thermal stress ring, preload ring and piezoelectric sensitive assembly are all axisymmetric structures; and the base is provided with grooves for fixing the core assembly and the outer cover.

[0012] The ultra-wide temperature acceleration sensor described in the present invention, as a preferred embodiment, the cable assembly includes a cable lead nozzle, a metal armored cable and an electrical connector; the piezoelectric sensitive unit also includes an open slot structure sealed and connected to one side of the base and sealed to the cable lead nozzle,

[0013] The metal armored cable includes a metal tube, a metal core wire arranged inside the metal tube and welded to a lead sheet, and metal oxide powder that fills and fixes the metal tube and the metal core wire. The number of metal core wires is 2. The electrical connector and the metal armored cable are connected by welding. The electrical connector is a watertight connector. The cable lead nozzle and the metal armored cable are connected by welding.

[0014] The present invention provides a method for preparing an ultra-wide temperature acceleration sensor, comprising the following steps:

[0015] S1. Assembly of piezoelectric sensitive components: Alternately arrange the lead sheets and piezoelectric crystals up and down, place an insulating ceramic above the top lead sheet and below the bottom lead sheet respectively, and then connect all the lead sheets in parallel. The assembly of the piezoelectric sensitive components is completed.

[0016] S2. Assembly of the piezoelectric sensitive unit: put the core assembly into the groove of the base, and then put the piezoelectric sensitive assembly, mass block, thermal stress ring, and pre-tightening ring on the core assembly in sequence. The pre-tightening ring presses the piezoelectric sensitive assembly, mass block, and thermal stress ring and then welds them to the core assembly. Then, the core assembly and the base are welded and fused. The assembly of the piezoelectric sensitive unit is completed.

[0017] S3, connecting the core wire in the cable assembly to the lead piece in the piezoelectric sensitive component, and the cable assembly is assembled;

[0018] S4. Outer cover assembly: Place the outer cover on the outside of the core assembly and weld it. The ultra-wide temperature acceleration sensor is completed.

[0019] The method for preparing an ultra-wide temperature acceleration sensor described in the present invention is, as a preferred embodiment, in step S2, the piezoelectric sensitive component, the mass block, the thermal stress ring, and the pre-tightening ring are sequentially passed through the core body, and the pre-tightening ring is threadedly connected to the core body and then welded.

[0020] The method for preparing an ultra-wide temperature acceleration sensor described in the present invention is, as a preferred embodiment, in step S3, the cable lead nozzle is welded to the base.

[0021] This technical solution provides an ultra-wide temperature acceleration sensor, which is mainly used to measure vibration acceleration parameters when the ambient temperature varies over a large range. The sensor converts the measured acceleration signal into an electrical signal and transmits it to the subsequent signal processing circuit. The reliable working temperature span is not less than 800°C, the low temperature working point can reach below -190°C, and the high temperature working point can reach above 600°C. The exposed structure of the sensor is assembled as a whole using a welding process to ensure overall sealing. It has the characteristics of a wide applicable temperature range, strong radiation resistance, corrosion resistance, and good sealing.

[0022] An ultra-wide temperature acceleration sensor includes a core assembly, a base, an outer cover, a preload ring, a mass block, a thermal stress ring, an insulating ceramic, a lead sheet, a piezoelectric crystal, a cable lead nozzle and a cable assembly. The core assembly is located inside the base, the outer cover is located above the base, an open slot structure sealed with the cable lead nozzle is located on the side of the base, the cable assembly is located inside the cable lead nozzle and the core wire and the lead sheet are welded together, the piezoelectric crystal and the lead sheet are in a staggered stacked structure, the insulating ceramics are respectively located on the upper and lower surfaces of this structure and are combined into one body and placed above the core base, the mass block is located above the insulating ceramic, the thermal stress ring is located inside the mass block, and the preload ring is located inside the mass block and above the thermal stress ring.

[0023] The core assembly is composed of one or more parts, with a screw-shaped structure in the center and a platform structure at the root of the screw.

[0024] The base and the core assembly need to be tightly fitted and then welded together, the outer cover and the base need to be tightly fitted and then welded together, the preload ring and the screw of the core are threadedly tightened to fasten the mass block, thermal stress ring and the integrated structure consisting of insulating ceramics, lead sheets and piezoelectric crystals to the core, and the cable lead connector on the base and the cable assembly is welded as one.

[0025] The cable assembly consists of a cable lead nozzle, a metal armored cable and an electrical connector, wherein the metal armored cable consists of an outer metal tube, two metal core wires and metal oxide powder embedded between them. The electrical connector and the armored cable are welded together. The metal core wire is connected to the lead piece by welding to ensure reliable signal transmission.

[0026] The ultra-wide temperature acceleration sensor is mainly composed of piezoelectric sensitive components and cable components and other structural parts that can work under ultra-wide temperature conditions. The piezoelectric sensitive component is mainly composed of a core component, a base, a preload ring, a mass block, a thermal stress ring, an insulating ceramic, a lead sheet and a piezoelectric crystal. Its core component is a piezoelectric crystal that can work reliably under wide temperature conditions. The cable assembly includes a cable and an electrical connector. The cable is a component directly connected to the sensor. Its operating temperature environment requirements are consistent with the sensor body. Therefore, an armored cable filled with metal oxide powder is used. The cable assembly is directly welded to the sensor base to ensure the overall sealing.

[0027] The present invention has the following advantages:

[0028] (1) The present invention has innovatively designed the sensor structure and added a thermal stress ring to the design of the sensitive component to ensure the stability of the output of the piezoelectric crystal and the tightness of the fit between the mass block and the sensitive component under a wide operating temperature.

[0029] (2) The present invention uses two lead sheets for the stacked part of the piezoelectric crystal to connect all the piezoelectric sheets in parallel as a group of piezoelectric sensitive components, thereby further improving the stability of the sensor's electrical signal output.

[0030] (3) During the assembly process of the present invention, the exposed part of the sensor is combined with the armored watertight cable by laser welding. After the whole machine is assembled, it can be applied to various test environments.

[0031] (4) The ultra-wide temperature acceleration sensor structure of the present invention adopts an integrated design, and has the characteristics of wide applicable temperature range, strong radiation resistance, corrosion resistance, good sealing, etc. The sensor has the characteristics of high reliability, fast response, good sealing, wide working temperature range, etc. The reliable working temperature span is not less than 800℃, the low temperature working point can reach below -190℃, and the high temperature working point can reach above 600℃. It can be applied to military and civilian fields such as nuclear energy, aerospace or aviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a cross-sectional diagram of the structure of an ultra-wide temperature acceleration sensor;

[0033] Figure 2 It is a three-dimensional axonometric diagram of an ultra-wide temperature acceleration sensor;

[0034] Figure 3 This is an enlarged view of a piezoelectric sensitive component of an ultra-wide temperature acceleration sensor;

[0035] Figure 4 The present invention is a flow chart of a method for preparing an ultra-wide temperature acceleration sensor.

[0036] Reference numerals:

[0037] 1. Piezoelectric sensitive unit; 11. Core assembly; 111. Core base; 112. Core; 12. Base; 13. Outer cover; 14. Mass block; 15. Thermal stress ring; 16. Preload ring; 17. Piezoelectric sensitive assembly; 171. Insulating ceramic; 172. Lead sheet; 173. Piezoelectric crystal; 2. Cable assembly; 21. Cable lead connector. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] Example 1

[0040] like Figure 1 , Figure 2As shown, an ultra-wide temperature acceleration sensor includes a piezoelectric sensitive unit 1 and a cable assembly 2 connected to the piezoelectric sensitive unit 1. The piezoelectric sensitive unit 1 and the cable assembly 2 are both sealed structures. The connection between the piezoelectric sensitive unit 1 and the cable assembly 2 is sealed. The piezoelectric sensitive unit 1 and the cable assembly 2 are applicable to the same ambient temperature range.

[0041] The piezoelectric sensitive unit 1 includes a core component 11, a base 12 fixed to the outside of the core component 11, an outer cover 13 arranged above the base 12 and located outside the core component 11, a mass block 14 arranged inside the outer cover 13 and located on the upper part of the core component 11, a thermal stress ring 15 arranged in the middle of the mass block 14, a preload ring 16 arranged on the upper part of the thermal stress ring 15 and located in the middle of the mass block 14, and a piezoelectric sensitive component 17 arranged between the mass block 14 and the core component 11. The core component 11 and the base 12 are connected to each other. The connection between the base 12 and the outer cover 13 is sealed, the core assembly 11 is used to support and fix the mass block 14, the thermal stress ring 15, the pre-tightening ring 16 and the piezoelectric sensitive component 17, the thermal stress ring 15 is used to absorb the thermal stress generated by the mass block 14 so that the piezoelectric sensitive component 17 can output stably at high and low temperatures, the pre-tightening ring 16 is used to compress the mass block 14, the thermal stress ring 15 and the piezoelectric sensitive component 17, and the piezoelectric sensitive component 17 is used to convert the acceleration signal into an electrical signal and output it through the cable assembly 2;

[0042] The core assembly 11 includes a core base 111 and a core 112 disposed at the center of the upper portion of the core base 111. The core 112 is a rod-shaped structure. The mass block 14, the thermal stress ring 15, the pre-tightening ring 16, and the piezoelectric sensitive component 17 all pass through the core 112. The pre-tightening ring 16 is fixed to the upper end of the core 112 by threads and then welded and fused.

[0043] The bottom of the piezoelectric sensitive component 17 is arranged on the core base 111, and the core 112 is located at the center of the piezoelectric sensitive component 17;

[0044] The base 111 and the core 112 are an integrated structure or fixed by welding or threaded connection;

[0045] The core assembly 11, the outer cover 13, the mass block 14, the thermal stress ring 15, the preload ring 16 and the piezoelectric sensitive assembly 17 are all axisymmetric structures; the base 12 is provided with a groove for fixing the core assembly 11 and the outer cover 13;

[0046] like Figure 3As shown, the piezoelectric sensitive component 17 includes lead pieces 172 alternately arranged up and down, piezoelectric crystals 173, and insulating ceramics 171 arranged above the uppermost lead piece 172 and below the lowermost lead piece 172. The number of insulating ceramics 171 is at least 2, and the lead pieces 172 are in a parallel structure. The insulating ceramic 171 located at the upper part is arranged below the bottom of the mass block 14, and the insulating ceramic 171 located at the lower part is arranged above the core base 111.

[0047] The cable assembly 2 includes the cable lead nozzle 21, a metal armored cable and an electrical connector;

[0048] The piezoelectric sensitive unit 1 also includes an open slot structure sealed and connected to one side of the base 12 and sealed to the cable lead nozzle 21, the lead sheet 172 is connected to the core wire of the cable assembly 2, and the cable assembly 2 is welded to the base open slot structure through the cable lead nozzle 21;

[0049] The metal armored cable includes a metal tube, a metal core wire arranged inside the metal tube and welded to the lead sheet 172, and a metal oxide powder that seals and fixes the metal tube and the metal core wire. The number of the metal core wires is 2, and the electrical connector and the metal armored cable are connected by welding, and the electrical connector is a watertight connector. The cable lead nozzle 21 and the metal armored cable are connected by welding.

[0050] Example 2

[0051] like Figure 1 : is a cross-sectional view of the structure of the ultra-wide temperature acceleration sensor of the present invention. The ultra-wide temperature acceleration sensor of the present invention comprises a piezoelectric sensitive unit 1 and a cable assembly 2;

[0052] The piezoelectric sensitive unit 1 includes a core component 11 , a base 12 , an outer cover 13 , a mass block 14 , a thermal stress ring 15 , a preload ring 16 , and a piezoelectric sensitive component 17 . The piezoelectric sensitive component 17 includes a lead sheet 172 , a piezoelectric crystal 173 , and an insulating ceramic 171 .

[0053] The exposed core assembly 11, base 12, outer cover 13 and cable assembly 2 are connected into a sealed whole through welding process, which is used to ensure the sealing and anti-electromagnetic interference capability of the product in the working environment of the entire ultra-wide temperature range.

[0054] After the insulating ceramic 171, the piezoelectric crystal 173 and the lead sheet 172 are combined into a piezoelectric sensitive component 17, they are firmly pressed by the fastening system composed of the mass block 14, the thermal stress ring 15 and the pre-tightening ring 16. Its function is to ensure that the acceleration of the measured object is continuously and stably converted into an electrical signal at an ambient temperature of -190℃ to +600℃.

[0055] After the pre-tightening ring 16 and the core body 112 are threadedly fastened, the two parts are welded together by a welding process. Its function is to prevent the pre-tightening ring 16 from loosening due to temperature strain during the acceleration measurement process in the entire ultra-wide temperature range, thereby preventing the overall failure of the sensor.

[0056] The cable assembly 2 is composed of a cable lead nozzle 21, a metal armored cable and an electrical connector, wherein the electrical connector is a watertight connector, and the metal armored cable is composed of an external metal tube, two metal core wires and metal oxide powder embedded therebetween. Its function is to maintain high insulation resistance and temperature stability at high temperatures greater than 600°C to ensure reliable transmission of electrical signals. At the same time, the sensor can also work reliably in sudden underwater environments.

[0057] The cable assembly 2 is located inside the cable lead nozzle 21 and the core wire and the lead piece 172 are welded together. Its function is to ensure the overall sealing, and at an ambient temperature greater than 600°C, the welding point will not fail due to high temperature, thereby causing the overall failure of the sensor.

[0058] Example 3

[0059] like Figure 4 As shown, a method for preparing an ultra-wide temperature acceleration sensor comprises the following steps:

[0060] S1. Assembling the piezoelectric sensitive component: Alternately arrange the lead pieces 172 and the piezoelectric crystals 173 up and down, place an insulating ceramic 171 above the top lead piece 172 and below the bottom lead piece 172 respectively, and then connect all the lead pieces 172 in parallel. The piezoelectric sensitive component 17 is assembled.

[0061] S2, assembling the piezoelectric sensitive unit: placing the core assembly 11 into the groove of the base 12, and then placing the piezoelectric sensitive assembly 17, the mass block 14, the thermal stress ring 15, and the pre-tightening ring 16 on the core assembly 11 in sequence, and then welding the pre-tightening ring 16 to the core assembly 11 after pressing the piezoelectric sensitive assembly 17, the mass block 14, and the thermal stress ring 15, and then welding and fusing the core assembly 11 and the base 12, and the piezoelectric sensitive unit 1 is assembled;

[0062] The piezoelectric sensitive component 17, the mass block 14, the thermal stress ring 15, and the pre-tightening ring 16 are sequentially passed through the core body 112, and the pre-tightening ring 16 is threadedly connected to the core body 112 and then welded;

[0063] S3, cable assembly: connect the core wire of the cable assembly 2 with the lead piece 172 of the piezoelectric sensitive component 17, and the cable assembly is completed;

[0064] S4, outer cover assembly: the outer cover 13 is placed on the outside of the core assembly 11 and welded, and the ultra-wide temperature acceleration sensor is completed.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-wide temperature acceleration sensor, characterized in that: It comprises a piezoelectric sensitive unit (1) and a cable assembly (2) connected to the piezoelectric sensitive unit (1), the piezoelectric sensitive unit (1) and the cable assembly (2) are both sealed structures, the connection between the piezoelectric sensitive unit (1) and the cable assembly (2) is sealed, and the piezoelectric sensitive unit (1) and the cable assembly (2) are applicable to the same ambient temperature range; The piezoelectric sensitive unit (1) comprises a core component (11), a base (12) fixed outside the core component (11), an outer cover (13) arranged above the base (12) and located outside the core component (11), a mass block (14) arranged inside the outer cover (13) and located above the core component (11), a thermal stress ring (15) arranged inside the mass block (14), a preload ring (16) arranged above the thermal stress ring (15) and located inside the mass block (14), and a piezoelectric sensitive component (17) arranged between the mass block (14) and the core component (11); the connection between the core component (11) and the base (12) is sealed, and the connection between the base (12) and the outer cover (13) is sealed. The core assembly (11) is used to support and fix the mass block (14), the thermal stress ring (15), the pre-tightening ring (16) and the piezoelectric sensitive component (17); a groove for installing the thermal stress ring (15) and the pre-tightening ring (16) is arranged inside the mass block (14); the thickness of the thermal stress ring (15) is greater than that of the pre-tightening ring (16); the thermal stress ring (15) is used to absorb the thermal stress generated by the mass block (14) so ​​that the piezoelectric sensitive component (17) can output stably at both high and low temperatures; the pre-tightening ring (16) is used to compress the mass block (14), the thermal stress ring (15) and the piezoelectric sensitive component (17); the piezoelectric sensitive component (17) is used to convert the acceleration signal into an electrical signal and output it through the cable assembly (2); The piezoelectric sensitive component (17) comprises lead pieces (172) arranged alternately up and down, a piezoelectric crystal (173), and an insulating ceramic (171) arranged above the uppermost lead piece (172) and below the lowermost lead piece (172), the number of the insulating ceramics (171) being at least two, the lead pieces (172) being a parallel structure, the insulating ceramic (171) located at the upper part being arranged below the bottom of the mass block (14), and the insulating ceramic (171) located at the lower part being arranged above the core base (111); The cable assembly (2) comprises a cable lead nozzle (21), a metal armored cable and an electrical connector; The piezoelectric sensitive unit (1) also includes an open slot structure that is sealed and connected to one side of the base (12) and to the cable lead nozzle (21); the lead sheet (172) is connected to the core wire of the cable assembly (2); and the cable assembly (2) is welded to the open slot structure; The metal armored cable comprises a metal tube, a metal core wire arranged inside the metal tube and welded to the lead sheet (172), and metal oxide powder for encapsulating and fixing the metal tube and the metal core wire, the number of the metal core wires is 2, the electrical connector and the metal armored cable are connected by welding, the electrical connector is a watertight connector, and the cable lead nozzle (21) and the metal armored cable are connected by welding; The preparation method of the ultra-wide temperature acceleration sensor comprises the following steps: S1. Assembling the piezoelectric sensitive component: Alternately arrange the lead pieces (172) and the piezoelectric crystals (173) up and down, place an insulating ceramic (171) above the uppermost lead piece (172) and below the lowermost lead piece (172), respectively, and then connect all the lead pieces (172) in parallel. The piezoelectric sensitive component (17) is assembled; S2, assembling the piezoelectric sensitive unit: placing the core assembly (11) into the groove of the base (12), and then placing the piezoelectric sensitive assembly (17), the mass block (14), the thermal stress ring (15), and the pre-tightening ring (16) on the core assembly (11) in sequence; the pre-tightening ring (16) presses the piezoelectric sensitive assembly (17), the mass block (14), and the thermal stress ring (15) and then welds them to the core assembly (11); and then the core assembly (11) and the base (12) are welded and fused, and the piezoelectric sensitive unit (1) is assembled; S3, cable assembly: connecting the core wire in the cable assembly (2) to the lead piece (172) in the piezoelectric sensitive component (17), and the cable assembly is completed; S4, outer cover assembly: the outer cover (13) is placed on the outside of the core assembly (11) and welded, and the ultra-wide temperature acceleration sensor is prepared.

2. The ultra-wide temperature acceleration sensor according to claim 1, characterized in that: The core assembly (11) comprises a core base (111) and a core (112) arranged at the center of the upper part of the core base (111); the core (112) is a rod-shaped structure; the mass block (14), the thermal stress ring (15), the pre-tightening ring (16), and the piezoelectric sensitive component (17) all pass through the core (112); the pre-tightening ring (16) is fixed to the upper end of the core (112) by means of threads and then welded and fused.

3. The ultra-wide temperature acceleration sensor according to claim 2, characterized in that: The bottom of the piezoelectric sensitive component (17) is arranged on the core base (111), and the core (112) is located at the center of the piezoelectric sensitive component (17).

4. The ultra-wide temperature acceleration sensor according to claim 3, characterized in that: The core base (111) and the core (112) are an integrated structure or are fixed by welding or threaded connection.

5. The ultra-wide temperature acceleration sensor according to claim 1, characterized in that: The core assembly (11), the outer cover (13), the mass block (14), the thermal stress ring (15), the preload ring (16) and the piezoelectric sensitive assembly (17) are all axisymmetric structures; the base (12) is provided with a groove for fixing the core assembly (11) and the outer cover (13).

6. The ultra-wide temperature acceleration sensor according to claim 1, characterized in that: In step S2, the piezoelectric sensitive component (17), the mass block (14), the thermal stress ring (15), and the pre-tightening ring (16) are sequentially passed through the core body (112), and the pre-tightening ring (16) is threadedly connected to the core body (112) and then welded.

7. The ultra-wide temperature acceleration sensor according to claim 1, characterized in that: In step S3, the cable lead nozzle (21) on the cable assembly (2) is welded to the base (12).

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