CN1760656A

CN1760656A - High temperature differential piezoelectric accelerometer out splice going splice in anti-

Info

Publication number: CN1760656A
Application number: CN 200510030784
Authority: CN
Inventors: 包绍明; 雒彩云; 沈夏城
Original assignee: Shanghai Institute of Ceramics of CAS
Current assignee: Shanghai Institute of Ceramics of CAS
Priority date: 2005-10-27
Filing date: 2005-10-27
Publication date: 2006-04-19
Anticipated expiration: 2025-10-27
Also published as: CN100523766C

Abstract

The present invention relates to a kind of anti-middle high temperature differential piezoelectric accelerometer out splice going splice, be exclusively used in the output unit of the high-temperature piezoelectric accelerometer of condition of high temperature test, belong to oscillation sensor field.The present invention includes 10 parts forms, inner casing 1, nut 2, front end insulator 3, collar 4, jack 5, rear end insulator 6, irdome 7, lining 8, wire clamp 9, screw 10, this invention out splice going splice can continue to bear 500 ℃ high temperature for a long time, and guarantee its job stability, even under 500 ℃ of states of high temperature, still have 10 ⁹The resistance of Ω.

Description

High temperature differential piezoelectric accelerometer out splice going splice in anti-

Technical field

The present invention relates to a kind of anti-middle high temperature differential piezoelectric accelerometer out splice going splice, be exclusively used in the output unit of the high-temperature piezoelectric accelerometer of condition of high temperature test, belong to oscillation sensor field.

Background technology

The high temperature vibration-testing is a special application, have a wide range of applications at national key areas such as Aeronautics and Astronautics, petroleum detection, the accurate guidance of guided missile, communications, therefore, researching high-temperature piezoelectric and new construction device are to national defence with civilian science and economic worth arranged.And piezoelectric accelerometer is to use one of maximum sensor in the vibration detection.The output valve that guarantees the high-temperature piezoelectric accelerometer is accurately reliable and stable, and whether the excuse that will see output exactly of its key is reliable and stable.Therefore, the design of joint and processing all directly have influence on the precision and the accuracy of high temperature vibration test.

Summary of the invention

The present invention has adopted unique high temperature resistant project organization and special exotic material, and this makes and can continue for a long time to bear 500 ℃ middle hot operation state on probe temperature, and guarantees its job stability.This is wherein of paramount importance to be the selection and the design of high temperature insulating material, and not only will make has very high insulation impedance under the high temperature, more will consider with the reliable of mechanical component to be connected.What we selected for use is 95 aluminium oxide with stability, because it has high resistivity under the condition of high temperature, even still have 10 under 500 ℃ of states of high temperature ⁹The resistance of Ω.Because processing technology is very ripe, therefore is used as insulating part and can guarantees that the output of its sensor is stable simultaneously with 95 aluminium oxide.

This out splice going splice has adopted titanium alloy material or high temperature alloy steel, make to have very strong oxidation resistance, and long-term the maintenance is rigidly connected.

The present invention has 10 parts and forms, as shown in the figure, and wherein:

1, inner casing is mainly used in and fixes its former and later two insulating oxide aluminium stupaliths, and its material is with high-temperature alloy steel or titanium alloy material.Its machining precision major requirement is and the cooperating of insulating ceramics, because the aluminium oxide ceramics compacting comes out, to such an extent as to have expansion and contraction, advises that therefore dimensional accuracy formulates according to the size of pottery;

2, nut, this nut are the coupling arrangements that cooperates with the high-temperature piezoelectric accelerometer.Because many accelerometers are to be used for aeromotor or space shuttle, so Oscillation Amplitude can be very big, and environmental baseline also is very abominable, and connection reliably just seems very important;

3, front end insulator, the fundamental purpose of this part are to fix with the jack that sensor is connected.Material is 95 alumina materials, owing to have certain expansion and contraction, therefore must note the accuracy requirement of compacting tool set;

4, collar mainly processes with spring steel, and fundamental purpose is the front end scope activity that the nut that will connect is limited in whole joint.This part is disposable installation, just can not dismantle in case install the back;

5, jack, these parts are the strength members that directly have influence on output stability.It is that elasticity by itself material cooperates with the contact pin of sensor, thereby transmission of electric signals, so the material of this part must possess good elastic property.But kept its original very strong elasticity because general steel is all impossible under the condition of high temperature, therefore selecting material is a difficult point.What patent of the present invention adopted is a kind of high temperature spring steel through special processing, under 500 ℃ of high-temperature conditions, still can keep its elasticity constant.Being connected with the signal wire of lead is the mode that compresses with machinery, and can not bear high temperature because method is acquired in common soldering, and with other welding way because material inconsistent is difficult to the effect that reaches desirable;

6, rear end insulator, the purpose of this insulator are to be insulation and to fix its jack equally.Fixed form of the present invention is the right cylinder that this insulator is designed to have certain taper, with part 8 in---lining fastens it at part 1---inner casing;

7, irdome, the effect of this part is the connection lead of back is pressed on the rear end part of joint, and must be connected with the exterior shield layer of lead, this just makes the shell of sensor be connected to the screen layer of lead by joint, thereby makes whole system all be in the low noise masked state effectively;

8, lining, as above-mentioned, this lining is used for the rear end insulator is pressed on inner casing, so this part has the tapering with the insulator same size;

9, wire clamp and since the time regular meeting from this joint of sensor dismounting, so lead can be easy to come off.In order to guarantee that lead is not pulled easily, be fixed with wire clamp, avoid the inner and connector receptacle disconnection of lead, simultaneously the permanent joint outside that is fixed on of conductor shielding layer guaranteed the shielding quality;

10, screw is with the clamping wire function of engage thread realization wire clamp.

The present invention has following advantage:

(1) bears 500 ℃ high temperature, and have very high insulation resistance;

(2) simple in structure, be convenient to installation and removal, be applicable to various complex environments;

(3) adopted titanium alloy material or high temperature alloy steel, made to have very strong oxidation resistance, and long-term the maintenance, be rigidly connected;

(4) the shielding end that is connected the earth with output lead is connected, and therefore has more very strong antijamming capability.

Description of drawings

Fig. 1 is the structural representation of joint of the present invention;

Fig. 2 is the high-temperature piezoelectric accelerometer of GYD104-f001 in the specific embodiment of the invention and the connection diagram of joint of the present invention.

Embodiment

With Shanghai Silicate Inst., Chinese Academy of Sciences production model be that the high-temperature piezoelectric accelerometer of GYD104-f001 is complementary, can be under 450 ℃ of conditions of high temperature the output valve of stable its sensor of output., testing the condition of high temperature through 1 hour, its result shows that the joint of this invention has reliably, makes things convenient for, shields characteristics such as good.

Claims

1, anti-middle high temperature differential piezoelectric accelerometer out splice going splice is characterized in that comprising 10 parts: inner casing (1), nut (2), front end insulator (3), collar (4), jack (5), rear end insulator (6), irdome (7), lining (8), wire clamp (9), screw (10):

Inner casing (1) is front end insulator (3) and rear end insulator (6) fixedly; Collar (4) is stuck between inner casing (1) and the nut (2), and the nut (2) that connects is limited in the front end scope activity of joint; The elasticity of the material of jack (5) dependence own cooperates with the contact pin of sensor; The right cylinder of rear end insulator (6) for having certain taper fastens it in inner casing (1) with lining (8); Wire clamp (9) is used for lead fixed, and realizes threadably with screw (10).

2, by the described anti-middle high temperature differential piezoelectric accelerometer out splice going splice of claim 1, it is characterized in that lining (8) is identical with the tapering of rear end insulator (6).

3, by the described anti-middle high temperature differential piezoelectric accelerometer out splice going splice of claim 1, it is characterized in that inner casing adopts high-temperature alloy steel or titanium alloy material.

4, by the described anti-middle high temperature differential piezoelectric accelerometer out splice going splice of claim 1, it is characterized in that front end insulator (3) and rear end insulator (6) adopt alumina ceramic material.