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Development of Online Detecting System Base on Pressure Artificial Denture

Author: ZhangShaoJia
Tutor: FengYongJian
School: Xiamen University
Course: Precision instruments and machinery
Keywords: Detection system Signal Conditioning Data acquisition and processing
CLC: TP274.4
Type: Master's thesis
Year: 2009
Downloads: 35
Quote: 2
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Abstract


In oral clinical care for patients after natural teeth missing, the treatment of partial denture repair, denture oral tissue below the force will directly affect the health of the patient, and therefore, Oral Medicine researchers need an accurate understanding of the denture on oral tissue below the force. In this paper, denture pressure line detection system, the detection system microcontroller as the control core, real-time data analysis and processing and the use of microcomputer In this connection, the paper is mainly to carry out the following research: 1 mΩ level changes of weak resistance signal measurement, design a bridge circuit with error compensation effectively reduces the circuit lead resistance error and initial imbalance error; using high-precision built-in resistor integrated device of amplification of weak signals, reducing the gain of the circuit error and improve the common mode rejection ratio; design hardware anti-aliasing filter to suppress unwanted noise signal and increase the system's signal-to-noise ratio of the active second-order low-pass filter. 2, in accordance with the real-time data acquisition system, high reliability, versatility and ease of expansion requirements, design a microcontroller as the core control system, 12-way field data acquisition, conversion accuracy of 10 sampling frequency 50Hz; achieve parallel data transfer protocol between the I / O and USB port automatically converted to single-chip timing control USB chip in order to achieve higher data transfer rate of the MCU and host computer, communication rates up to 1 Mbps. 3, starting from the practicality and economy of the system, written in Visual C PC software, the image of the system interface intuitive and easy to use. Fixed random error and nonlinearity error in the software, the introduction of digital filtering and the method of least squares algorithm, and improve the anti-jamming capability. Dynamic display data using double buffering technology curve with good animation, which provides real-time monitoring of the doctors convenient. 4, the test performance of the sensor embedded within the denture base, the measured analysis of the data shows that good linearity and repeatability of the system; work of the entire detection system test results show that the good performance of the detection system, The input and output relationship of having a stable, can accurately measure the variation of the external pressure. Oral clinical sensors distributed buried implant denture base, the system test of oral tissue below the force to withstand the force of the denture beneath the mucosa and mucosa below the bone tissue can be accurately measured The size and the distribution of forces.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Centralized testing and roving detection system
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