CN202361996U - Connection reliability detecting system for laser gyro frequency stabilizing component - Google Patents

Abstract

The utility model belongs to detection technology, in particular to a detection system for connection reliability of laser gyroscope frequency stabilization components. The laser gyro frequency stabilization component connection reliability detection system includes a piezoelectric ceramic sheet, a low-expansion alloy, an ultrasonic probe, an ultrasonic transmitting and receiving system data acquisition system, and a motion scanning system, wherein the piezoelectric ceramic sheet and the low-expansion alloy are composed of After three minutes of heating treatment from 20 degrees to 100 degrees, then one minute of 100 degrees of high temperature treatment, then three minutes of 100 degrees to 160 degrees of temperature rise treatment, and then one minute of 160 degrees of high temperature treatment and cooling with the heating equipment The temperature-treated metal solder is connected to form a frequency-stabilizing component. The utility model also uses ultrasonic waves to scan the connection state of the piezoelectric ceramic element and the low-expansion alloy connection surface, and can realize the positioning and qualitative analysis of defects, and the detection of defects is accurate and reliable, without causing any damage to the frequency stabilization components, and the operation is convenient. efficient.

Description

A laser gyroscope frequency stabilization component connection reliability detection system

technical field

The utility model belongs to detection technology, in particular to a detection system for connection reliability of laser gyroscope frequency stabilization components. the

Background technique

The laser gyroscope is a precision optical measurement device. In order to ensure the measurement accuracy, it is required to keep the resonant frequency stable in the whole working temperature range. The laser gyro frequency stabilization component is an ideal micro-displacement device used to stabilize the working mode frequency of the resonator in the laser gyro. It is attached to the resonator mirror, and pushes and pulls the mirror according to the requirements of the control circuit to realize the resonance. The real-time compensation of the cavity length, and then complete the control circuit to stabilize the working mode frequency of the laser gyroscope. Since the laser gyroscope is a high-precision angular displacement measurement sensor, the frequency stability of the working mode of the resonant cavity is required to be very high, and the laser gyroscope has a long service life and reliability. Sex is also very demanding. Therefore, the connection reliability of the frequency stabilization components has an important impact on the accuracy and reliability of the laser gyroscope. Frequency stabilization components are generally composed of piezoelectric ceramic elements and low-expansion alloy components. The size of the connection area and connection strength between piezoelectric ceramic elements and low-expansion alloys are the decisive factors that affect the connection reliability of frequency stabilization components. The connection reliability of frequency components has an important impact on the accuracy and reliability performance of laser gyro. In order to ensure the accuracy and reliability of the laser gyroscope, it is necessary to test the connection reliability of the frequency stabilization components. the

In actual production, for the detection of the connection quality of a large number of frequency stabilization components, a certain proportion of sampling is generally adopted for destructive peeling detection, resulting in consequences: On the one hand, irreversible damage is caused to the frequency stabilization components, resulting in the failure of the frequency stabilization components ; On the other hand, it is not possible to test all the frequency stabilization components one by one, and there may be hidden dangers of internal defects. When the laser gyroscope works for a long time under various harsh environmental conditions, if there is some kind of defect inside the connection, the connection strength between the frequency stabilization component and the glass-ceramic will decrease significantly in the vibration environment, which will seriously affect the stability of the frequency stabilization component. The compensation ability of the laser gyroscope cavity length causes the laser gyroscope not to work normally. the

Contents of the invention

The purpose of the utility model is to provide a reliable detection system for the connection reliability of laser gyro frequency stabilization components with convenient operation, high detection efficiency, safety and reliability. the

The technical scheme of the utility model is: a laser gyro frequency stabilization component connection reliability detection system, which includes a piezoelectric ceramic sheet, a low-expansion alloy, an ultrasonic probe, an ultrasonic transmitting and receiving system data acquisition system, and a motion scanning system. The piezoelectric ceramic sheet and the low-expansion alloy are connected by metal solder to form a frequency stabilization component. The ultrasonic probe 5 is placed at 0.2 to 0.3 mm above the frequency stabilization component in water, and is connected with the data acquisition system 6 of the ultrasonic transmitting and receiving system and the motion scanning System 7 is connected. the

The metal solder is a low-temperature metal solder with a thickness of 0.49 to 0.51 microns. the

The thickness of the metal solder is 0.5 micron. the

The piezoelectric ceramics are provided with loading counterweights. the

The utility model has the advantages that: the piezoelectric ceramic element of the laser gyro frequency stabilization component of the utility model and the low-expansion alloy are melted by a metal low-temperature solder treated at a special temperature to complete a good connection between the two, so that the solder is processed at a specific temperature It can be effectively and evenly distributed between the piezoelectric ceramic element and the low-expansion joint, and it is not easy to generate harmful stress during the connection process. During detection, ultrasonic waves can easily penetrate metal low-temperature solder, analyze the received ultrasonic information, and compare it with the ultrasonic image of qualified frequency-stabilizing components, so that the connection reliability of frequency-stabilizing components can be judged conveniently and quickly. The operation is simple, the precision is high, and the detection efficiency can be greatly improved. the

Description of drawings

Fig. 1 is a principle schematic diagram of a preferred embodiment of the connection reliability detection system of the laser gyro frequency stabilization component of the present invention;

Figure 2 is an enlarged view of the tested piece in Figure 1;

Among them, 1-piezoelectric ceramic sheet, 2-low expansion alloy, 3-metal solder, 4-loading weight, 5-ultrasonic probe, 6-ultrasonic transmitting and receiving system data acquisition system, 7-motion scanning system, 8- industrial computer. the

Detailed ways

Below the utility model is described in further detail. the

Please refer to FIG. 1 and FIG. 2 at the same time, wherein FIG. 1 is a schematic diagram of a preferred embodiment of the connection reliability detection system of the laser gyro frequency stabilization component of the present invention, and FIG. 2 is an enlarged view of the device under test in FIG. 1 . Among them, the laser gyro frequency stabilization component connection reliability detection system includes piezoelectric ceramic sheet 1, low expansion alloy 2, metal solder 3, loading counterweight 4 and ultrasonic probe 5, ultrasonic transmitting and receiving system data acquisition system 6, motion Scanning system 7 and industrial computer 8. The piezoelectric ceramic sheet 1 and the low-expansion alloy 2 are connected by a metal solder disposed between the two, constituting the tested frequency stabilization component. The loading counterweight 4 is arranged on the piezoelectric ceramic sheet 1 to apply pressure to the piezoelectric ceramic sheet 1 , so as to increase the connection effect between the piezoelectric ceramic sheet 1 and the low expansion alloy 2 . The ultrasonic probe 5 is placed 0.2 to 0.3 mm above the frequency stabilization component in the water, and is connected to the data acquisition system 6 of the ultrasonic transmitting and receiving system. By generating ultrasonic waves, the connection reliability of the metal solder in the frequency stabilization component is tested. Wherein, the metal solder is a low-temperature metal solder with a thickness of 0.49 to 0.51 microns, preferably 0.5 microns, and the metal solder is heated from 20 degrees to 100 degrees for three minutes, and then subjected to a high temperature of 100 degrees for one minute. The treatment is followed by a three-minute 100-170-degree temperature rise treatment, and then a one-minute 170-degree high-temperature treatment and temperature treatment with the heating equipment cooling down. the

When the connection reliability detection system of the laser gyro frequency stabilization component of the utility model works, the connecting surface of the piezoelectric ceramic sheet 1 and the low-expansion alloy 2 is cleaned first; Corresponding metal solder 3; place the piezoelectric ceramic sheet 1 on the low expansion alloy 2 so that both are close to the metal solder 3 (round low-temperature solder material), and then load the weight 4 on the piezoelectric ceramic sheet 1 Carry out temperature treatment to the metal low-temperature solder 3 in a high-temperature environment, so that the piezoelectric ceramic sheet 1 and the low-expansion alloy 2 are melted and connected, wherein the temperature treatment of the metal solder 3 includes three minutes from 20 degrees to 100 degrees Heating treatment, then one minute of 100-degree high-temperature treatment, followed by three-minute 100-170-degree temperature rise treatment, and then one-minute 170-degree high-temperature treatment and cooling with the heating equipment; then place the ultrasonic probe 5 in the water frequency stabilization component 0.2 to 0.3 mm above, and connected with the ultrasonic transmitting and receiving system data acquisition system 6 and the motion scanning system 7, the ultrasonic transmitting and receiving system data acquisition system 6 receives the sound wave emitted by the ultrasonic probe 5 and passes through the frequency stabilization component, and the received By analyzing the ultrasonic information and comparing it with the ultrasonic image of qualified frequency stabilization components, the connection reliability of the frequency stabilization components can be judged conveniently and quickly. the

In addition, the utility model can also be adjusted to a certain extent, especially the thickness and temperature of the low-temperature solder material are not limited to those mentioned in this embodiment, and can also be adjusted within a certain thickness and temperature range according to actual needs. the

In summary, the connection method between the piezoelectric ceramic element and the low-expansion joint of the laser gyro frequency stabilization component of the utility model is achieved by melting the metal low-temperature solder to complete a good connection between the two, and it is not easy to generate harmful stress, and the ultrasonic wave is used to control the piezoelectric ceramic element. The scanning of the connection state between the ceramic element and the low-expansion alloy connection surface can realize the positioning and qualitative analysis of defects, and the detection of defects is accurate and reliable. Compared with the traditional destructive peeling detection, it will not cause any damage to the frequency stabilization components, achieving reliable , Economical and safe effects, and reduced manufacturing costs, easy to operate, high efficiency. In addition, the metal connection has good stability at the full working temperature of the laser gyroscope, and has high reliability in the process of cavity length change caused by temperature compensation of the frequency stabilization component, which can effectively improve the reliability of the overall connection, which is conducive to effective, accurate and stable compensation The change of the resonant cavity caused by the ambient temperature improves the performance of the laser gyroscope. the

Claims (4)

1. A laser gyro frequency stabilization component connection reliability detection system, characterized in that it includes a piezoelectric ceramic sheet [1], a low expansion alloy [2], an ultrasonic probe [5] and an ultrasonic transmitting and receiving system data acquisition system [6] ], a motion scanning system [7], wherein the piezoelectric ceramic sheet [1] and the low-expansion alloy [2] are connected by metal solder to form a frequency stabilization component, and the ultrasonic probe [5] is placed in the water frequency stabilization component 0.2 to 0.3mm above, and connected with the data acquisition system [6] of the ultrasonic transmitting and receiving system and the motion scanning system [7]. 2. The laser gyro frequency stabilization component connection reliability detection system according to claim 1, characterized in that: the metal solder [3] is a low-temperature metal solder with a thickness of 0.49 to 0.51 microns. 3. The laser gyro frequency stabilization component connection reliability detection system according to claim 2, characterized in that: the metal solder [3] has a thickness of 0.5 microns. 4. The laser gyro frequency stabilization component connection reliability detection system according to any one of claims 1 to 3, characterized in that: the piezoelectric ceramic is provided with a loading counterweight [4]. the

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