CN218848180U - Signaling device of servo pendulum accelerometer - Google Patents

Abstract

The utility model discloses a signaler of a servo pendulum accelerometer, which comprises a sensor component and a torquer coil; the sensor assembly comprises a shaft assembly, a fixed polar plate and a pendulum assembly; the number of the fixed polar plates is two; the shaft assembly is used for supporting the pendulum assembly and enabling the pendulum assembly to rotate between the two fixed pole plates; the pendulum assembly generates a differential capacitor with the fixed polar plate when rotating; the output signal of the differential capacitor is converted into current by the servo circuit and provided to the torquer coil. The utility model has the advantages that: the servo pendulum accelerometer annunciator adopts a differential capacitive sensor mode with a special structure, and has the characteristics of small volume, high zero sensitivity, strong environmental adaptability and small influence of temperature change on the performance of the annunciator.

Description

Signaling device of servo pendulum accelerometer

Technical Field

The utility model relates to an annunciator technical field, concretely relates to annunciator of servo pendulum-type accelerometer.

Background

The servo pendulum accelerometer has the characteristics of high precision, high reliability, small power and the like, and is widely suitable for systems with high precision such as airplanes and missiles. The annunciator is a key component of the servo pendulum accelerometer, generally adopts an inductive or capacitive structure, but the inductive sensor has large volume and weight, is easy to be interfered by temperature to measurement, has an alternating current zero signal, is not suitable for high-frequency dynamic measurement, and has higher requirements on the stability of the frequency and amplitude of an excitation power supply; in the capacitive sensor, if the differential thermal expansion, vibration or mechanical tolerance of the host system causes the gap of the capacitive sensor to change, thereby causing measurement distortion, and the nonlinearity of the capacitive sensor is large, especially the polar distance change type capacitive sensor, is improved by adopting a differential capacitive structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve in capacitive sensor, if host system's difference thermal expansion, vibration or mechanical tolerance can lead to capacitive sensor clearance to change to lead to measuring the distortion, and capacitive sensor's nonlinear big problem provides a signal ware of servo pendulum-type accelerometer.

The purpose of the utility model is realized through the following technical scheme: a signaler of a servo pendulum accelerometer comprises a sensor assembly, a servo circuit module and a torquer coil; the sensor assembly comprises a shaft assembly, a fixed polar plate and a pendulum assembly; the number of the fixed polar plates is two; the shaft assembly is used for supporting the pendulum assembly and enabling the pendulum assembly to rotate between the two fixed pole plates; the pendulum assembly generates a differential capacitor with the fixed polar plate when rotating; the output signal of the differential capacitor is converted into current by the servo circuit and is provided for the torquer coil;

further, the pendulum assembly comprises a pendulum plate and a counterweight part; the swinging piece is connected with the shaft assembly; the counterweight part is used for adjusting balance of the pendulum moment;

furthermore, the counterweight part comprises a first counterweight block and a second counterweight block; the second balancing weight is bonded on the swinging piece; an adjusting groove is formed in the second balancing weight; the first balancing weight is movably arranged in the adjusting groove;

further, the first balancing weight comprises one or more of 2A12 aluminum alloy, H62 brass and 1Cr13 stainless steel materials;

furthermore, a spherical bulge and a reinforcing rib are further arranged on the surface of one side of the swinging piece; an annular boss is arranged on the other side surface of the swinging sheet;

furthermore, a groove is formed in the swing sheet corresponding to the shaft assembly; the shaft assembly is bonded in the groove through an adhesive;

further, the shaft assembly comprises a shaft rod and shaft tips at two ends of the shaft rod; the shaft lever is connected with the groove; the shaft tip is used for being in contact fit with the bearing;

furthermore, a boss is arranged on the surface of one side of the fixed polar plate, which is close to the pendulum assembly;

according to a further technical scheme, the fixed pole plate is made of a nine-five aluminum oxide ceramic material, and ion beam sputtering gold layers are arranged on two sides of the fixed pole plate.

The utility model has the advantages of it is following:

1. the servo pendulum accelerometer annunciator adopts a differential capacitive sensor mode with a special structure, and has the characteristics of small volume, high zero sensitivity, strong environmental adaptability and small influence of temperature change on the performance of the annunciator;

2. the servo pendulum type accelerometer signal device is used for sensing the displacement of the inertia detection mass of the accelerometer deviating from the balance position, and the differential capacitor is converted into current after being detected by the servo circuit;

3. when the pendulum assembly rotates between the two fixed polar plates, the pendulum assembly and the fixed polar plates generate differential capacitance, and the differential capacitance is converted into current after being detected by the servo circuit and is provided for a torquer coil;

4. the shaft assembly provides a rotation center, and the pendulum assembly is supported by the shaft assembly to rotate, so that the reduction of friction torque is facilitated, and the better effects of improving the sensitivity limit of the accelerometer and reducing hysteresis errors are achieved.

Drawings

Fig. 1 is a schematic diagram of the explosion structure of the present invention.

Fig. 2 is a schematic structural view of the present invention at a viewing angle.

Fig. 3 is a schematic structural diagram of the present invention at another viewing angle.

In the figure: 1. a torquer coil; 2. fixing a polar plate; 3. arranging a sheet; 4. a counterweight portion; 41. a first weight block; 42. a second counterweight block; 5. a spherical bulge; 6. reinforcing ribs; 7. an annular boss; 8. a groove; 10. A shaft rod; 11. a shaft tip; 12. and (4) a boss.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are conventionally placed in use, or the position or positional relationship which the skilled person conventionally understand, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific position, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1: as shown in fig. 1 to 3, a signaler of a servo pendulum accelerometer includes a sensor assembly; the sensor assembly comprises a shaft assembly, a fixed polar plate 2 and a pendulum assembly; the number of the fixed polar plates 2 is two; the shaft assembly is used for supporting the pendulum assembly and enabling the pendulum assembly to rotate between the two fixed pole plates 2; when the pendulum assembly rotates, the pendulum assembly and the fixed-level fixed polar plate 2 generate a differential capacitor; the output signal of the differential capacitor is converted into current by a servo circuit and provided for the torquer coil 1; the servo pendulum accelerometer annunciator adopts a differential capacitive sensor mode with a special structure, and has the characteristics of small volume, high zero sensitivity, strong environmental adaptability and small influence of temperature change on the performance of the annunciator; the servo pendulum type accelerometer signal device is used for sensing the displacement of the inertia detection mass of the accelerometer deviating from the balance position, and the differential capacitance is converted into current after being detected by the servo circuit; when the pendulum assembly rotates between the two fixed polar plates 2, the pendulum assembly and the fixed polar plates 2 generate differential capacitance, and the differential capacitance is converted into current after being detected by a servo circuit and is provided for the torquer coil 1; the shaft assembly provides a rotation center, and the pendulum assembly is supported by the shaft assembly to rotate, so that the reduction of friction torque is facilitated, and the better effects of improving the sensitivity limit of the accelerometer and reducing hysteresis errors are achieved.

The pendulum assembly comprises a pendulum plate 3 and a counterweight part 4; the swing piece 3 is connected with the shaft assembly; the weight portion 4 is used for adjusting balance of the pendulum moment.

The counterweight part 4 comprises a first counterweight block 41 and a second counterweight block 42; the second balancing weight 42 is adhered to the swinging piece 3; an adjusting groove is arranged on the second balancing weight 42; the first balancing weight 41 is movably arranged in the adjusting groove; in this embodiment, the first balancing weight 41 and the second balancing weight 42 can be connected by a screw thread, the screw threads are correspondingly arranged in the adjusting groove and the first configuration block, and the gravity center is adjusted by the depth of the first control balancing weight screwed into the second balancing weight 42, so as to meet the requirement of zero offset precision.

The first balancing weight 41 comprises one or more of 2A12 aluminum alloy, H62 brass and 1Cr13 stainless steel; the weight of the balance weight I1 is changed by changing the specific gravity of the material of the first balancing weight block 41, and the balance of the pendulum moment is adjusted, so that the pendulum slice 34 is positioned at the center of the fixed pole plate 2.

The surface of one side of the swinging piece 3 is also provided with a spherical bulge 5 and a reinforcing rib 6; an annular boss 7 is arranged on the other side surface of the swinging piece 3; the spherical bulge 5 and the reinforcing ribs 6 are favorable for meeting the shape precision requirement under the environmental condition; the annular boss 7 facilitates the matching torquer coil 1 to be in a uniform air gap magnetic field.

A groove 8 is formed in the swing piece 3 corresponding to the shaft assembly; the shaft assembly is bonded in the groove 8 through an adhesive; set up recess 8 on the pendulum piece 3, be favorable to enlarging the area of contact between axle subassembly and the pendulum piece 3, be connected pendulum piece 3 and axle subassembly through soldering lug 9, be favorable to improving the bonding effect.

The shaft assembly comprises a shaft rod 10 and shaft tips 11 at two ends of the shaft rod; the middle part of the shaft rod 10; the shaft tip 11 is used for being in contact fit with a bearing; the shaft tip 11 is used for being in contact fit with a bearing; in the embodiment, the shaft tip 11 is a conical structure with the taper of 60 degrees, the coaxiality is phi 0.02mm, and the shaft tip 11 is used for being matched with a conical jewel bearing; after the shaft tip 11 is in point contact with the bearing point, theoretically calculated friction torque is small, and the method plays a good role in improving the sensitivity limit of the accelerometer and reducing hysteresis errors. In the embodiment, the shaft tip 11 is made of hard alloy YLN which is high in hardness and needs to be separated and ground, the shaft assembly is made of 2A12, the shaft tip 11 is not consistent in hardness with the shaft rod 10, and the shaft tip 11 is bonded to the end face of the shaft rod 10 through HY-107 glue. In this embodiment, the distance between the pivot 11 at one end of the shaft lever 10 and the edge of the swing piece 3 at the adjacent side is L1; the distance between the shaft tip 11 at the other end of the shaft lever 10 and the edge of the swinging piece 3 at the close side is L2; the difference between L1 and L2 is less than 0.05mm.

A boss 12 is arranged on the surface of one side of the fixed polar plate 2, which is close to the pendulum assembly; the arrangement of the lug boss 12 at the edge of the fixed pole plate 2 is beneficial to limiting the swing range of the pendulum assembly.

The fixed polar plate 2 is made of a nine-five aluminum oxide ceramic material, and ion beam sputtering gold layers are arranged on two sides of the fixed polar plate; the gold plating of the fixed polar plate 2 uses magnetron ion sputtering equipment, uses ions to bombard the Ni80Cr20 target material, and is emitted and deposited on the quintanous ceramic alumina base material, and the formed gold layer is compact, uniform and stable, and has good welding performance.

Example 2: based on example 1, the material of the first weight block 41 is 2a12 aluminum alloy, and the length is 3mm.

Example 3: based on the embodiment 1, the material of the first balancing weight 41 is selected from H62 brass, and the length is 1.5mm.

Example 4: based on embodiment 1, the material of the first weight block 41 is 1Cr13 stainless steel with a length of 2mm.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (9)

1. An annunciator of a servo pendulum accelerometer, characterized in that: the sensor comprises a sensor component and a torquer coil; the sensor assembly comprises a shaft assembly, a fixed polar plate and a pendulum assembly; the number of the fixed polar plates is two; the shaft assembly is used for supporting the pendulum assembly and enabling the pendulum assembly to rotate between the two fixed pole plates; the pendulum assembly generates a differential capacitor with the fixed polar plate when rotating; the output signal of the differential capacitor is converted into current by the servo circuit and provided to the torquer coil.

2. An annunciator for a servo pendulum accelerometer as defined in claim 1, wherein: the pendulum assembly comprises a pendulum plate and a counterweight part; the swing sheet is connected with the shaft assembly; the counterweight part is used for adjusting balance of the pendulum moment.

3. An annunciator for a servo pendulum accelerometer as claimed in claim 2, wherein: the counterweight part comprises a first counterweight block and a second counterweight block; the second balancing weight is bonded on the swinging piece; an adjusting groove is formed in the second balancing weight; the first balancing weight is movably arranged in the adjusting groove.

4. An annunciator for a servo pendulum accelerometer as claimed in claim 3, wherein: the first balancing weight comprises one or more of 2A12 aluminum alloy, H62 brass and 1Cr13 stainless steel materials.

5. An annunciator for a servo pendulum accelerometer as claimed in claim 2, wherein: the surface of one side of the swinging piece is also provided with a spherical bulge and a reinforcing rib; and an annular boss is arranged on the other side surface of the swinging piece.

6. An annunciator for a servo pendulum accelerometer as claimed in claim 2, wherein: grooves are formed in the swing sheet corresponding to the shaft assemblies; the shaft assembly is bonded in the groove through adhesive.

7. An annunciator for a servo pendulum accelerometer as claimed in claim 1, wherein: the shaft assembly comprises a shaft rod and shaft tips at two ends of the shaft rod; the shaft lever is connected with the groove; the shaft tip is used for contact fit with the bearing.

8. An annunciator for a servo pendulum accelerometer as defined in claim 1, wherein: and a boss is arranged on the surface of one side of the fixed polar plate, which is close to the pendulum assembly.

9. An annunciator for a servo pendulum accelerometer as claimed in claim 1, wherein: the fixed polar plate is made of a nine-five aluminum oxide ceramic material, and ion beam sputtering gold layers are arranged on two sides of the fixed polar plate.

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