阅读说明：本技术 一种当量可调式加速度计及其内部故障快速定位方法 (Equivalent adjustable accelerometer and internal fault rapid positioning method thereof ) 是由 张阳 李军朔 杜剑 党建军 罗霄 刘振宇 贾程戈 曹涵 于 2021-07-13 设计创作，主要内容包括：本发明涉及一种当量可调式加速度计及其内部故障快速定位方法,其目的是解决现有加速度计存在当量不可调,且随着时间的推移当量逐渐变大的技术问题。该加速度计包括第一可调电阻和第二可调电阻,以及同时设置于上轭铁或下轭铁上的无磁漆包线A’接线柱和无磁漆包线B’接线柱；无磁漆包线A’的相应镀金区域通过金属丝连接无磁漆包线A’接线柱；无磁漆包线B’的相应镀金区域通过金属丝连接无磁漆包线B’接线柱；第一可调电阻连接于所述无磁漆包线A’接线柱和无磁漆包线B’接线柱之间；第二可调电阻连接于力矩器高低端接线柱之间。该方法通过对上、下动圈组件线圈各自开路与短路情况进行识别,实现对加速度计内部故障的快速排查与定位。(The invention relates to an equivalent adjustable accelerometer and a method for quickly positioning internal faults of the accelerometer, and aims to solve the technical problems that the equivalent of the existing accelerometer is not adjustable and is gradually increased along with the lapse of time. The accelerometer comprises a first adjustable resistor, a second adjustable resistor, a non-magnetic enameled wire A 'binding post and a non-magnetic enameled wire B' binding post, wherein the non-magnetic enameled wire A 'binding post and the non-magnetic enameled wire B' binding post are arranged on an upper yoke iron or a lower yoke iron at the same time; the corresponding gold-plated area of the non-magnetic enameled wire A 'is connected with a binding post of the non-magnetic enameled wire A' through a metal wire; the corresponding gold-plated area of the non-magnetic enameled wire B 'is connected with a binding post of the non-magnetic enameled wire B' through a metal wire; the first adjustable resistor is connected between the binding post of the non-magnetic enameled wire A 'and the binding post of the non-magnetic enameled wire B'; the second adjustable resistor is connected between the high-low end binding posts of the torquer. According to the method, the quick troubleshooting and positioning of the internal fault of the accelerometer are realized by identifying the respective open circuit and short circuit conditions of the upper moving coil assembly coil and the lower moving coil assembly coil.)

1. An equivalent weight adjustable accelerometer comprises an upper torquer, a lower torquer and a swinging sheet (1), wherein the upper torquer comprises an upper yoke (20) and an upper moving coil assembly (21); the lower torquer comprises a lower yoke (30), a lower moving coil assembly (31), a torquer low-end binding post (32) and a torquer high-end binding post (33) which are arranged on the lower yoke (30); the upper moving coil assembly (21) leads out a non-magnetic enameled wire A and a non-magnetic enameled wire A 'from a welding window of a moving coil framework, and the lower moving coil assembly (31) leads out a non-magnetic enameled wire B and a non-magnetic enameled wire B' from a welding window of a moving coil framework; the non-magnetic enameled wire A is welded on a corresponding gold-plated area of the upper surface of the swinging piece (1), and then is led out and connected with a high-end binding post (33) of the torquer through a metal wire, the non-magnetic enameled wire B is welded on a corresponding gold-plated area of the lower surface of the swinging piece (1), and is led out and connected with a low-end binding post (32) of the torquer through the metal wire after the gold-plated area of the inner side wall of the outer ring piece of the swinging piece (1) is conducted with the corresponding gold-plated area of the upper surface of the swinging piece (1), and the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively welded on the corresponding gold-plated areas of the upper surface and the lower surface of the swinging piece (1);

the method is characterized in that:

the magnetic flux-free magnetic core is characterized by further comprising a first adjustable resistor (6), a second adjustable resistor (7), a non-magnetic enameled wire A 'binding post (4) and a non-magnetic enameled wire B' binding post (5) which are arranged on the upper yoke (20) or the lower yoke (30) at the same time;

the corresponding gold-plated area of the non-magnetic enameled wire A 'on the upper surface of the swinging piece (1) is connected with a binding post (4) of the non-magnetic enameled wire A' through a metal wire;

the corresponding gold-plated area of the non-magnetic enameled wire B 'on the lower surface of the swinging piece (1) is connected with a binding post (5) of the non-magnetic enameled wire B' through a metal wire;

the first adjustable resistor (6) is connected between the binding post (4) of the non-magnetic enameled wire A 'and the binding post (5) of the non-magnetic enameled wire B';

the second adjustable resistor (7) is connected between the low-end binding post (32) of the torquer and the high-end binding post (33) of the torquer.

2. The equivalent tunable accelerometer of claim 1, wherein:

the resistance ranges of the first adjustable resistor (6) and the second adjustable resistor (7) are both 0-200 omega.

3. The equivalent tunable accelerometer of claim 2, wherein:

the resistance drift of the first adjustable resistor (6) and the second adjustable resistor (7) is within 0.001% omega.

4. The equivalent-adjustable accelerometer according to claim 1, 2 or 3, wherein:

the binding posts (4) of the non-magnetic enameled wires A 'and the binding posts (5) of the non-magnetic enameled wires B' are staggered vertically and horizontally.

5. The equivalent tunable accelerometer of claim 4, wherein:

the metal wire is a gold wire.

6. A method for rapidly positioning an internal fault of an equivalent weight adjustable accelerometer, which is based on the equivalent weight adjustable accelerometer of any one of claims 1 to 5, and comprises the following steps:

the second adjustable resistor (7) is removed, the resistance value between the high-end binding post (33) of the torquer and the binding post (4) of the non-magnetic enameled wire A' is measured, whether the resistance value is normal or not is judged, and if the resistance value is smaller than 20 omega, the insulating film layer of the coil of the upper moving coil assembly (21) is broken; if the resistance value is larger than 1 MOmega, welding points of the non-magnetic enameled wire A and/or the non-magnetic enameled wire A' of the upper moving coil assembly (21) fall off, or a coil of the upper moving coil assembly (21) is broken; otherwise, the coil of the upper moving coil assembly (21) is normal;

measuring the resistance value between a low-end binding post (32) of the torquer and a binding post (5) of the non-magnetic enameled wire B ', judging whether the resistance value is normal or not, if the resistance value is smaller than 20 omega, breaking an insulating film layer of a coil of the lower moving coil assembly (31), and if the resistance value is larger than 1M omega, dropping off a welding point of the non-magnetic enameled wire B and/or the non-magnetic enameled wire B' of the lower moving coil assembly (31), or breaking the coil of the lower moving coil assembly (31); otherwise, the coil of the lower moving coil assembly (31) is normal.

Technical Field

The invention relates to an accelerometer, in particular to an equivalent adjustable accelerometer and a method for quickly positioning internal faults of the accelerometer.

Background

The quartz accelerometer in the existing accelerometer is an inertial navigation device for measuring acceleration by using Newton's second law (law of inertia), is widely applied to navigation systems such as spaceships and the like, is one of core components of the navigation systems, and is an accelerometer for detecting acceleration by using a differential capacitance principle. The specific detection process is as follows: the accelerometer senses input acceleration through the detection mass, and when acceleration load exists in the direction of an input shaft of the accelerometer, the detection mass deviates from a balance position under the action of inertia force and performs deflection motion around the flexible pivot. The differential capacitance sensor composed of the upper yoke iron, the lower yoke iron and the pendulous reed of the accelerometer outputs differential capacitance, the differential capacitance of the upper yoke iron and the lower yoke iron is connected with a differential capacitance detector of a servo circuit through a non-magnetic enameled wire and is converted into a certain amount of current, the current is integrated and amplified to form balance current which is output to a torquer coil (namely a moving coil component bonded on the front surface and the back surface of the pendulous reed), the electromagnetic force generated when the balance current flows through the coil forms balance torque with the same numerical value and the opposite direction of the inertia torque, and the balance current and the acceleration are in a positive proportion relation.

In the prior art, a quartz accelerometer mainly comprises an upper torquer, a lower torquer and a pendulum piece made of quartz material, and sensitive components of the quartz accelerometer are shown in fig. 1 and comprise a lower end face (ground) of an upper yoke 020 of the upper torquer, a front face (positive capacitor plate) of the pendulum piece 01, a back face (negative capacitor plate) of the pendulum piece 01 and an upper end face (ground) of a lower yoke 030 of the lower torquer. The lower end face (ground) of the upper yoke 020 and the front face (positive of the capacitor plate) of the pendulum plate 01 form C +, and the upper end face (ground) of the lower yoke 030 and the back face (negative of the capacitor plate) of the pendulum plate 01 form C-. The front and back surfaces of the pendulum plate 01 are both bonded with moving coil assemblies to form the pendulum plate 01 with sensitive mass, the pendulum plate 01 with sensitive mass changes along with the acceleration, the gap between the pendulum plate 01 and the upper yoke 020 and the gap between the pendulum plate 01 and the lower yoke 030 changes to cause the capacitance difference to change (delta C ═ C +) - (C-)), a capacitance signal is converted into current through a servo circuit, and the magnitude of the acceleration is reflected through the magnitude of the current.

The specific structure of the accelerometer, as shown in fig. 2 to 8, includes an upper torquer, a lower torquer and a pendulum plate 01, where the upper torquer includes an upper yoke 020, an upper moving coil assembly 021, and a lower terminal 022 of the torquer, a higher terminal 023 of the torquer, a positive terminal 024 of the sensor, a negative terminal 025 of the sensor, and a ground terminal 026 of the torquer, which are disposed on the upper yoke 020; the lower torquer comprises a lower yoke 030 and a lower moving coil assembly 031; the swinging piece 01 comprises a central piece, an outer ring piece which is concentrically arranged with the central piece, and a swinging beam which connects the central piece and the outer ring piece; the upper moving coil assembly 021 and the lower moving coil assembly 031 are respectively arranged at the upper surface and the lower surface of the central sheet, the upper moving coil assembly 021 leads out a non-magnetic enameled wire A and a non-magnetic enameled wire A 'from a welding window of a moving coil framework of the upper moving coil assembly, and the lower moving coil assembly 031 leads out a non-magnetic enameled wire B and a non-magnetic enameled wire B' from a welding window of a moving coil framework of the lower moving coil assembly; the non-magnetic enameled wire A is welded on a gold-plated area on the upper surface of the wobble plate 01 and then is led out by a metal wire to be connected with the high-end binding post 023 of the torquer, the non-magnetic enameled wire B is welded on the gold-plated area on the lower surface of the wobble plate 01 and is led out by the metal wire to be connected with the low-end binding post 022 of the torquer after being conducted with the gold-plated area on the upper surface of the wobble plate 01 through the gold-plated area on the inner side wall of the outer ring plate, and the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively welded on the gold-plated areas on the upper surface and the lower surface of the wobble plate 01; the ground wire binding post 026 is directly welded on the lower yoke 020; the positive terminal 024 of the sensor is connected with a gold-plated area on the upper surface of the swinging piece 01 through a metal wire, the negative terminal 025 of the sensor is connected with another gold-plated area on the upper surface of the swinging piece 01 through a metal wire, and the gold-plated area is connected with a corresponding gold-plated area on the lower surface of the swinging piece 01 through a gold-plated area on the inner side wall of the outer ring piece; the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively welded in gold-plated areas on the upper surface and the lower surface of the swinging piece 01, and the upper moving coil assembly and the lower moving coil assembly are connected in series through metal films plated on the side surfaces of the swinging piece 01.

The accelerometer output equivalent, which is equal to the ratio of the output current to the input acceleration, is an amplified scaling factor, known in the engineering as the accelerometer scaling factor (in mA/g). The larger the accelerometer equivalent, the stronger the output capability of the accelerometer and the stronger the ability to sense a small input. Meanwhile, the larger the equivalent weight of the accelerometer is, the larger the output current of the accelerometer is under the condition of the same acceleration input, and the larger the power consumption of the system is, the more obvious the heat is, and the larger the heat influence on the whole accelerometer is.

At present, the requirements of accelerometers of different models on equivalent weight are different from 0.6-1.2 mA/g, and the equivalent weight of the accelerometer is not adjustable after production is finished due to the specific structure adopted by the existing accelerometer. Therefore, different accelerometers need to be designed according to different equivalent requirements, which brings great limitation to the production batch and application of the accelerometers.

Further, the equivalent equation for an accelerometer is:

wherein:

k₁is equivalent;

p is the pendulum property, and the unit is N.m/g;

K_Tthe coefficient of the accelerometer torquer is N.mm/A;

m is the mass of the pendulum assembly, and the unit is kg;

l is an inertia force arm, and the unit is m;

l is the coil length in m;

l' is an electromagnetic force arm with the unit of m;

b is the air gap magnetic field strength with the unit of T;

in practical applications, the equivalent k is caused by the decay of the magnetic value B with the passage of time₁The size of the system is enlarged, which causes troubles to the system application, and a series of parameters are required to be adjusted accordingly.

Disclosure of Invention

The invention aims to solve the problems that the equivalent weight of the existing accelerometer is not adjustable and k is equivalent with the lapse of time₁The equivalent adjustable accelerometer and the method for quickly positioning the internal fault thereof are provided.

In order to solve the technical problems, the technical solution provided by the invention is as follows:

an equivalent weight adjustable accelerometer comprises an upper torquer, a lower torquer and a swinging sheet, wherein the upper torquer comprises an upper yoke and an upper moving coil assembly; the lower torquer comprises a lower yoke iron, a lower moving coil assembly, a torquer low-end binding post and a torquer high-end binding post, wherein the torquer low-end binding post and the torquer high-end binding post are arranged on the lower yoke iron; the upper moving coil component leads out a non-magnetic enameled wire A and a non-magnetic enameled wire A 'from a welding window of a moving coil framework of the upper moving coil component, and the lower moving coil component leads out a non-magnetic enameled wire B and a non-magnetic enameled wire B' from a welding window of a moving coil framework of the lower moving coil component; the non-magnetic enameled wire A is welded on a corresponding gold-plated area of the upper surface of the swinging piece and then is led out through a metal wire to be connected with the high-end binding post of the torquer, the non-magnetic enameled wire B is welded on a corresponding gold-plated area of the lower surface of the swinging piece, and is led out through the metal wire to be connected with the low-end binding post of the torquer after the gold-plated area of the inner side wall of the outer ring piece of the swinging piece is conducted with the corresponding gold-plated area of the upper surface of the swinging piece, and the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively welded on corresponding gold-plated areas of the upper surface and the lower surface of the swinging piece;

it is characterized in that:

the magnetic circuit also comprises a first adjustable resistor, a second adjustable resistor, a non-magnetic enameled wire A 'binding post and a non-magnetic enameled wire B' binding post which are arranged on the upper yoke iron or the lower yoke iron at the same time;

the corresponding gold-plated area of the non-magnetic enameled wire A 'on the upper surface of the pendulum piece is connected with a binding post of the non-magnetic enameled wire A' through a metal wire;

the corresponding gold-plated area of the non-magnetic enameled wire B 'on the lower surface of the swinging piece is connected with a binding post of the non-magnetic enameled wire B' through a metal wire;

the first adjustable resistor is connected between the binding post of the non-magnetic enameled wire A 'and the binding post of the non-magnetic enameled wire B';

and the second adjustable resistor is connected between the lower end binding post of the torquer and the high end binding post of the torquer.

Further, the resistance ranges of the first adjustable resistor and the second adjustable resistor are both 0-200 omega.

Further, the resistance drift of the first adjustable resistor and the second adjustable resistor is within 0.001% omega.

Further, the binding posts of the non-magnetic enameled wires A 'and the binding posts of the non-magnetic enameled wires B' are staggered vertically and horizontally.

Further, the metal wire is a gold wire.

Meanwhile, the invention also provides a method for quickly positioning the internal fault of the equivalent weight adjustable accelerometer, which is characterized in that the method comprises the following steps based on the equivalent weight adjustable accelerometer:

removing the second adjustable resistor, measuring the resistance value between the high-end binding post of the torquer and the binding post of the non-magnetic enameled wire A', judging whether the resistance value is normal, and if the resistance value is less than 20 omega, breaking the insulating film layer of the coil of the upper moving coil assembly; if the resistance value is larger than 1 MOmega, the welding point of the non-magnetic enameled wire A and/or the non-magnetic enameled wire A' of the upper moving coil assembly falls off, or the coil of the upper moving coil assembly is broken; otherwise, the coil of the upper moving coil assembly is normal;

measuring the resistance value between the lower end binding post of the torquer and the binding post of the non-magnetic enameled wire B ', judging whether the resistance value is normal, if the resistance value is less than 20 omega, breaking an insulating film layer of the coil of the lower moving coil assembly, and if the resistance value is more than 1M omega, dropping off a welding point of the non-magnetic enameled wire B and/or the non-magnetic enameled wire B' of the lower moving coil assembly, or breaking the coil of the lower moving coil assembly; otherwise, the coil of the lower moving coil assembly is normal.

Compared with the prior art, the invention has the following beneficial effects:

1. in the equivalent adjustable accelerometer provided by the invention, for the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' which are respectively connected to the front side and the back side of the pendulum piece, the side surface of the pendulum piece is not subjected to metal film plating conduction in the prior art, but the side surface of the pendulum piece is subjected to metal film conduction in the prior art, a binding post for the non-magnetic enameled wire A 'and a binding post for the non-magnetic enameled wire B' are simultaneously arranged on the upper yoke or the lower yoke, and then the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively connected with corresponding gold-plated areas through metal wires, so that the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are led out, and the open circuit of the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' is realized. The accelerometer is characterized in that a first adjustable resistor is connected between outgoing lines of a non-magnetic enameled wire A 'binding post and a non-magnetic enameled wire B' binding post and serves as an internal series resistor of the accelerometer, equivalent of the accelerometer is reduced and adjusted, a second adjustable resistor is connected between a lower end binding post of the torquer and a high end binding post of the torquer and serves as an external parallel resistor of the accelerometer, equivalent of the accelerometer is increased and adjusted, and therefore different accelerometers are not required to be designed according to different equivalent requirements in production of the accelerometer, and large-scale batch production of the accelerometer is greatly promoted.

2. In the equivalent adjustable accelerometer provided by the invention, a first adjustable resistor is connected between outgoing lines of a non-magnetic enameled wire A 'binding post and a non-magnetic enameled wire B' binding post, a second adjustable resistor is connected between a lower end binding post of a torquer and a high end binding post of the torquer, and the apparent stability of the equivalent of the accelerometer is realized by utilizing the precise adjustment and compensation of the adjustable resistor.

3. According to the equivalent adjustable accelerometer and the method for quickly positioning internal faults of the equivalent adjustable accelerometer, due to the arrangement of the non-magnetic enameled wire A 'binding post and the non-magnetic enameled wire B' binding post, modularization of an upper moment device and a lower moment device is achieved, the open-circuit and short-circuit conditions of an upper moving coil assembly coil and a lower moving coil assembly coil can be identified by respectively measuring the resistance value between the high-end binding post of the moment device and the non-magnetic enameled wire A 'binding post and the resistance value between the low-end binding post of the moment device and the non-magnetic enameled wire B' binding post, and quick troubleshooting and positioning of the internal faults of the accelerometer are achieved.

4. In the equivalent adjustable accelerometer provided by the invention, on the premise of convenient welding, the binding posts of the non-magnetic enameled wire A 'and the binding posts of the non-magnetic enameled wire B' which are simultaneously arranged on the upper yoke or the lower yoke are arranged in a vertically and horizontally staggered manner so as to avoid the contact between metal wires respectively led out from the binding posts of the non-magnetic enameled wire A 'and the non-magnetic enameled wire B'.

Drawings

FIG. 1 is a schematic diagram of a prior art quartz accelerometer sensitive component;

FIG. 2 is a schematic structural diagram of an upper yoke of a conventional quartz accelerometer;

FIG. 3 is a schematic structural diagram of a pendulous reed in a conventional quartz accelerometer;

FIG. 4 is a schematic structural diagram of an upper moving coil assembly and a lower moving coil assembly in a conventional quartz accelerometer;

FIG. 5 is a schematic view of the connection of non-magnetic enameled wires of upper and lower moving coil assemblies in a conventional quartz accelerometer;

FIG. 6 is a schematic diagram of an electrical structure of an upper surface of a pendulum mass in a conventional quartz accelerometer;

FIG. 7 is a schematic diagram of an electrical structure of a lower surface of a pendulous reed in a conventional quartz accelerometer;

FIG. 8 is a schematic structural diagram of a prior art quartz accelerometer;

FIG. 9 is a schematic view of a lower yoke of the equivalent weight adjustable accelerometer according to the present invention;

FIG. 10 is a schematic structural diagram of a pendulous reed in the equivalent-adjustable accelerometer of the invention, and further shows a non-magnetic enameled wire A 'binding post and a non-magnetic enameled wire B' binding post, wherein the non-magnetic enameled wire A 'binding post is connected with a metal wire a led out from the non-magnetic enameled wire A, the non-magnetic enameled wire B' binding post is connected with a metal wire B led out from the non-magnetic enameled wire B, an area c circled in the drawing corresponds to a metal film position where metal films are plated on the side surfaces of the pendulous reed in the corresponding gold-plated areas of the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' in the prior art, and the position on the side surface of the pendulous reed is not plated with a metal film for conduction in the invention;

FIG. 11 is a schematic structural diagram of the upper and lower moving coil assemblies of the present invention connecting the first adjustable resistor and the second adjustable resistor;

FIG. 12 is a schematic structural diagram of the equivalent tunable accelerometer of the present invention, which cannot be seen from the perspective of the figure because the first tunable resistor and the second tunable resistor are both located on the back (lower surface) of the lower yoke;

FIG. 13 is a schematic view of the structural principle of the junction between the back of the lower yoke and the first and second adjustable resistors in the equivalent weight adjustable accelerometer of the present invention;

description of reference numerals:

in fig. 1 to 8 (prior art):

01-pendulum piece, 020-upper yoke, 021-upper moving coil component, 030-lower yoke, 031-lower moving coil component, 022-lower end binding post of torquer, 023-high end binding post of torquer, 024-positive terminal binding post of sensor, 025-negative terminal binding post of sensor, 026-ground binding post;

in fig. 9 to 13 (invention):

1-a swinging sheet, 20-an upper yoke, 21-an upper moving coil component, 30-a lower yoke, 31-a lower moving coil component, 32-a lower end binding post of a torquer, 33-a high end binding post of the torquer, 34-a positive end binding post of a sensor, 35-a negative end binding post of the sensor, 4-a non-magnetic enameled wire A 'binding post, 5-a non-magnetic enameled wire B' binding post, 6-a first adjustable resistor and 7-a second adjustable resistor.

Detailed Description

The invention is further described below with reference to the figures and examples.

An equivalent adjustable accelerometer is shown in fig. 9 to 13 and comprises an upper torquer, a lower torquer, a pendulum piece 1, a non-magnetic enameled wire A 'binding post 4, a non-magnetic enameled wire B' binding post 5, a first adjustable resistor 6 and a second adjustable resistor 7. Wherein, the upper torquer comprises an upper yoke iron 20 and an upper moving coil component 21; the lower torquer comprises a lower yoke 30, a lower moving coil assembly 31, a torquer low-end binding post 32, a torquer high-end binding post 33, a sensor positive-end binding post 34, a sensor negative-end binding post 35 and a ground binding post, wherein the torquer low-end binding post, the torquer high-end binding post 33, the sensor positive-end binding post and the sensor negative-end binding post are arranged on the lower yoke 30; the swinging piece 1 comprises a central piece, an outer ring piece which is concentrically arranged with the central piece, and a swinging beam which connects the central piece and the outer ring piece; the upper moving coil assembly 21 and the lower moving coil assembly 31 are respectively arranged at the upper surface and the lower surface of the central piece, the upper moving coil assembly 21 leads out a non-magnetic enameled wire A and a non-magnetic enameled wire A 'from a welding window of a moving coil framework of the upper moving coil assembly 21, and the lower moving coil assembly 31 leads out a non-magnetic enameled wire B and a non-magnetic enameled wire B' from a welding window of a moving coil framework of the lower moving coil assembly 31.

The non-magnetic enameled wire A is welded on a corresponding gold-plated area on the upper surface of the pendulum piece 1 and then is led out through a metal wire to be connected with the high-end binding post 33 of the torquer, the non-magnetic enameled wire B is welded on a corresponding gold-plated area on the lower surface of the pendulum piece 1 and is led out through a metal wire to be connected with the low-end binding post 32 of the torquer after being conducted with the corresponding gold-plated area on the upper surface of the pendulum piece 1 through the gold-plated area on the inner side wall of the outer ring piece, and the non-magnetic enameled wire A 'and the non-magnetic enameled wire B' are respectively welded on the corresponding gold-plated areas on the upper surface and the lower surface of the pendulum piece 1; the ground wiring terminal is directly welded on the lower yoke 30; the sensor positive terminal 34 is connected with a gold-plated area on the upper surface of the wobble plate 1 through a metal wire, the sensor negative terminal 35 is connected with another gold-plated area on the upper surface of the wobble plate 1 through a metal wire, and the gold-plated area is connected with a corresponding gold-plated area on the lower surface of the wobble plate 1 through a gold-plated area on the inner side wall of the outer ring plate; the binding post 4 of the non-magnetic enameled wire A 'and the binding post 5 of the non-magnetic enameled wire B' are simultaneously arranged on the lower yoke iron 30 (or the upper yoke iron 20); the corresponding gold-plated area of the non-magnetic enameled wire A 'on the upper surface of the swinging piece 1 is connected with a binding post 4 of the non-magnetic enameled wire A' through a metal wire; the corresponding gold-plated area of the non-magnetic enameled wire B 'on the lower surface of the swinging piece 1 is connected with a binding post 5 of the non-magnetic enameled wire B' through a metal wire. On the premise of convenient welding, the binding posts 4 and 5 of the non-magnetic enameled wires A 'and B' which are arranged on the lower yoke 30 are staggered vertically and horizontally, so that the metal wires respectively led out from the non-magnetic enameled wires A '4 and the non-magnetic enameled wires B' are prevented from contacting with each other, and all the metal wires are gold wires. The first adjustable resistor 6 is connected between the wiring terminal 4 of the non-magnetic enameled wire A 'and the wiring terminal 5 of the non-magnetic enameled wire B' and is used as an internal series resistor of the accelerometer to reduce and adjust the equivalent of the accelerometer; the second adjustable resistor 7 is connected between the torquer low-end binding post 32 and the torquer high-end binding post 33 and is used as an external parallel resistor of the accelerometer to increase and adjust the equivalent weight of the accelerometer; the resistance ranges of the first adjustable resistor 6 and the second adjustable resistor 7 are both 0-200 omega, and the resistance drift is within 0.001% omega. The accelerometer with the structure is adopted, the coil of the upper and lower moment device moving coil assemblies is disconnected outside the accelerometer body, and the adjustable resistor is connected in series outside the accelerometer body for compensation, so that the equivalent weight of the accelerometer is finally adjusted.

The invention also provides a method for quickly positioning the internal fault of the equivalent adjustable accelerometer, which is based on the equivalent adjustable accelerometer and can respectively identify the open circuit and short circuit conditions of the coil of the upper moving coil assembly 21 and the coil of the lower moving coil assembly 31 by respectively measuring the resistance value between the high-end binding post of the torquer and the binding post 4 of the non-magnetic enameled wire A 'and the resistance value between the low-end binding post 32 of the torquer and the binding post 5 of the non-magnetic enameled wire B', so as to realize quick troubleshooting and positioning of the internal fault of the accelerometer.

The method specifically comprises the following steps:

the second adjustable resistor 7 is removed, the resistance value between the high-end binding post 33 of the torquer and the binding post 4 of the non-magnetic enameled wire A' is measured, whether the resistance value is normal or not is judged, and if the resistance value is smaller than 20 omega, the insulating film layer of the coil of the upper moving coil assembly 21 is broken; if the resistance value is greater than 1 MOmega, the welding point of the non-magnetic enameled wire A and/or the non-magnetic enameled wire A' of the upper moving coil assembly 21 falls off, or the coil of the upper moving coil assembly 21 is broken; otherwise, the coil of the upper moving coil assembly 21 is normal;

measuring the resistance value between the lower end binding post 32 of the torquer and the binding post 5 of the non-magnetic enameled wire B ', judging whether the resistance value is normal or not, if the resistance value is less than 20 omega, breaking an insulating film layer of the coil of the lower moving coil assembly 31, and if the resistance value is more than 1M omega, dropping off a welding spot of the non-magnetic enameled wire B and/or the non-magnetic enameled wire B' of the lower moving coil assembly 31, or breaking the coil of the lower moving coil assembly 31; otherwise, the coil of the lower moving coil assembly 31 is normal.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to substitute part of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.