為提高電容測量精度，針對電容式傳感器的工作原理設計了基于PIC16LF874單片機電容測量模塊。簡單闡述了電容測量電路的應用背景和國內外研究現狀，介紹了美國Microchip公司PIC16LF874單片機的特性。電容式傳感器輸出的動態微弱電容信號通過PS021型電容數字轉換器把模擬量數據轉換成數字量數據，所測數據由PIC16LF874單片機應用程序進行處理、顯示和保存。實驗結果表明，固定電容標稱值為10~20 pF 的測量值相對誤差在1%以內，同時也可知被測電容容值越大，測量值和標稱值相對誤差越小。
Abstract:
To improve the accuracy of capacitance measurement，aimed at the principle of work of mercury capacitance acceleration transducer，the design of micro capacitance measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the background and status of foreign researchers，focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors （capacitancedigital converter） to convert analog data into digital data，the measured data from the PIC16LF874 microcontroller application process， display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%，but also it canbe seen the value of the measured capacitance larger，measuring value and the nominal value of relative error smaller.
設計一種基于P89V51RD2的功率因數測量儀，采用光電隔離器和專用數碼管驅動器。該測量儀是以增強型單片機P89V51RD2為核心，大大簡化系統硬件設計。而軟件部分采用模塊化設計思想，采用中值濾波和小數補償算法，實現功率因數的高精度測量。實驗測試表明，該功率因數測量儀測量精度高，運行穩定可靠。
Abstract:
A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive chip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
介紹了一種基于C8051F020單片機的多路壓力測量儀。該測量儀選用電阻應變式壓力傳感器采集壓力信號，并經放大電路處理后送入C8051F020單片機，再由C8051F020單片機內部的A/D轉換器將采集到的壓力信號進行模數轉化，然后分別對數據進行存儲和顯示。該測量儀能測量6路壓力信號，并且各測量點都能單獨檢測和設置。由于采用了C8051F020單片機，簡化了硬件電路，增強了抗干擾能力，使得測量儀具有測量精度高，沖擊小等特點。
Abstract:
A measurement apparatus for multi-channel pressure based on single chip microcomputer is introduced.It can measure 6 channels signal of the pressure，and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors，the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally，and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple，and it also enhanced the anti-interference ability.It features high precision and little impact.
針對目前采用的熱敏電阻測量方法，提出了采用單總線數字式溫度傳感器DS18B20和單片機組成的新型溫度測量儀。介紹DS18B20的結構和工作原理，以及單總線工作原理，給出了由Mega8單片機和DS18B20構成的單總線溫度測量儀的硬件電路及軟件流程圖。經試驗基于單總線器件DS18B20的溫度測量儀，具有測量準確、測溫范圍寬、體積小、控制方便等優點。
Abstract:
This paper brings forward a new temperature meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20＇s structure and controlling principles are introduced and hardware circuit and software diagram of the temperature meter are given.After been tested,the temperature meter has the advantages of accurate measurement, wide temperature range, small volume and convenient controlling.
介紹一種以MSP430單片機為基礎的智能頻率測量系統，采用硬件邏輯與軟件指令相結合的方式控制閘門，實現0 MHz~10 MHz范圍內無檔切換的等精度測量。
Abstract:
An intelligent frequency measurement system based on MSP430 singlechip is introduced. The system uses a way that can combine hardware logic and software instructions to contronl the strobe ,and completes the functions of equal precision in the range of 0MHz~10MHz without shifting
