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Mine inclinometer application of piezo ceramic

Views: 7     Author: Site Editor     Publish Time: 2018-12-10      Origin: Site

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Mine inclination measurement is a new technology for mine borehole measurement, and it is an important means for comprehensive advance detection and structural positioning. Due to its unique role in pre-exploration exploration of piezo ceramic tubes, a number of corresponding technical studies have been conducted recently at home and abroad. At present, the prospecting and tilting technology mainly uses magnetic sensors or dynamic inertial sensors, and they all have their own shortcomings, which limits the application in mine inclination measurement. Researchers have been looking for more suitable gyro logging solutions. Research has been carried out in related fields, but the results are not satisfactory. The piezo gyroscope-based mine inclinometer system solves the limitation of magnetometers or traditional inclinometer instruments in the measurement of small or casing wells. The gyro inclinometer uses TMS320F281X DSP to realize data acquisition, digital filtering and real-time solution. The test sample tilt angle measurement range shown in the figure above is 0. ~360. The error is ±0.2. Within, the tilt angle measurement range is 0. ~15. The error is within ±0.44, which meets the measurement requirements of prospecting wells, and has the characteristics of small volume, low cost and stable performance, and has completely practical engineering application value. The above inclinometer using a piezoelectric gyro has great advantages in terms of accuracy. The main reason is its good impact resistance and resistance to large temperature differences, as well as insensitivity to geomagnetic effects. The conversion from graphic signals to data signals is also highly efficient.


Fiber differential interferometer


Based on the inverse piezoelectric effect of Pzt piezo ceramic material, a fiber-optic differential interferometer was designed using piezoelectric ceramics as a phaseless modulator. Theoretical analysis and experimental results show that the amplitude and frequency of the output intensity of the interferometer are related to the amplitude and frequency of the alternating signal voltage applied to the piezoelectric ceramic, and have a good linear relationship within a certain range of conditions. The interferometer using piezoelectric ceramics as an optical phase modulator has the characteristics of wide linear range and high sensitivity, and can be applied to monitoring or using external environmental vibration sources.By using the inverse piezoelectric effect of piezoelectric ceramics, by adding an alternating voltage signal to the piezoelectric ceramics, the phase of the signal transformed by the optical differential interferometer is modulated to meet the requirements. This method has high sensitivity and wide range. 


Shock absorption active control device


The elimination and attenuation of vibration has always been a problem in mechanical application systems. As mentioned earlier, this problem is even more pronounced in the study of precision instruments. Simple mechanical buffering is not enough to meet the ever-increasing demands for high precision, nor is it in line with the advancement of automation and intelligence. In other words, passive damping, at least on precision instruments tends to be eliminated. In terms of active damping, simple recoil damping equipment cannot meet the mechanical requirements of complex motion. Therefore, active damping based on positive and negative piezo ceramic tube crystal and feedback mechanisms has received more attention. A common feature of such applications is the immediate feedback of the vibration law to the control system, thereby calculating the need to counteract the vibration and delivering it to the execution system for execution. The feedback process relies mainly on the electromechanical conversion mechanism of piezoelectric ceramics.


Active control of car body vibration


Body vibration and noise generated by vibration can endanger the environment and human health. Strong body vibration can also affect the accuracy and stability of machine instrumentation. Seriously, it will shorten the life or vibrate of the structure due to fatigue damage and damage the structure. The vibration active control technology has become a hot research topic at home and abroad due to its potential advantages of good control effect and strong adaptability. In recent years, the rising and continuous maturity of piezo ceramic tube piezoelectric crystal has opened up a new way for the active control of vibration. Piezoelectric components are ideal for smart sensors, which have small size, light weight and good electrical characteristics. They also have excellent performances such as controllable frequency bandwidth and high electromechanical conversion efficiency. They are widely used in vibration damping of flexible structures. It is field of noise reduction research. Piezoelectric ceramics are used as sensing and actuators to study and explore the active vibration control of the car body.


The piezoelectric sensor amplifies the vibration of the vehicle body through the electric signal and immediately reacts it to the control system. After the control system calculates the data, it transmits the data to the excitation system to make the target vehicle vibrate within the required range. The robot's flexible arm, the positioning accuracy of the robot arm and the trajectory tracking accuracy are limited by the objective reasons such as the accuracy of the sensor, the transmission accuracy and the production cost. The macro/micro combined dual drive provides a new idea for solving the above problem. The basic idea is to use the macro mechanism to complete the coarse positioning of the system, and use the micro-driver to complete the high-precision and high-sensitivity positioning operation, which can effectively improve the resolution and positioning accuracy of the system, and ensure the system has a high response speed. Piezoelectric ceramic drivers are ideal drivers. By using the chip piezoelectric ceramic in the correct way of modeling and effective way, the vibration of the flexible arm can be effectively suppressed, and the influence of the hysteresis of the driver can be eliminated to complete the ideal trajectory control operation. Specifically, the sheet-shaped piezoelectric ceramic is attached to both sides of the flexible arm. When the flexible arm generates vibration, the driver receives the mechanical deformation signal and converts it into an electrical signal for transmission to the control system. After the control system calculates, the data is fed back to the driver, and the reverse operation of the above operation is performed, and the vibration and hysteresis of the flexible arm are eliminated by mechanical deformation.


Feed power system:


Piezoelectric ceramic micro-displacer has the characteristics of small volume, high displacement resolution, high frequency response, large carrying capacity, no noise, no heat, etc. It provides a simple way to convert the input driving voltage into nanometer precision. Precision motion is an ideal nano-displacement component that has excellent application prospects in optical, electronic, aerospace, mechanical manufacturing, bioengineering, robotics and other technical fields. However, the inherent nonlinearity, hysteresis and creep of piezoceramic cylinder tube lead to the nonlinear effect of piezoelectric ceramics, which brings difficulties to the control of ceramics of piezoelectric ceramics. Many scholars have proposed a number of solutions to these shortcomings. These methods are embodied in the examples below and will be discussed in a unified manner. CNC gear measuring instrument, CNC gear measuring instrument is a multi-axis CNC gear measuring instrument, which is mainly used for the detection of various parameters such as spiral deviation, tooth profile deviation and pitch deviation of the gear. The instrument makes the instrument through electronic development method. The probe goes out of the ideal curve on the gear contact surface, and compares with the curve of the actual machined gear contact surface, thereby obtaining the error curve of the gear to judge whether the processed gear is qualified.


Traditional CNC gear measuring instruments are affected by complex machinery and large volume, and their accuracy is limited to a narrow range, making it difficult to make breakthroughs and improvements. The measuring instrument using the PZT piezoceramic tubes crystal motor converts electric energy into ultrasonic vibration of the elastic body due to the inverse piezoelectric effect, and is converted into a rotary or linear motion by the transmission. Due to the high frequency of the ultrasonic waves, the displacement driven by the motor is a microscopic displacement. The motor takes the animal's body motion by repeating this microscopic displacement. This type of motion allows measurement accuracy to be mentioned at very high levels. At the same time, the instrument volume is reduced, and the parameters of the instrument's whole machine are optimized.


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