【文章內(nèi)容簡介】 ramcontrolled switchboards, building automated munications call system, train radio munication, to the daily work can be seen everywhere in the mobile phones, trunked mobile radio, walkietalkies, etc.. 5. Microputer in the field of medical device applications SCM in the use of medical devices is also quite extensive, such as medical respirator, the various analyzers, monitors, ultrasound diagnostic equipment and hospital beds, etc. call system. 6. In a variety of major appliances in the modular applications Designed to achieve some special single specific function to be modular in a variety of circuit applications, without requiring the use of personnel to understand its internal structure. If music integrated single chip, seemingly simple function, miniature electronic chip in the (the principle is different from the tape machine), you need a puter similar to the principle of the plex. Such as: music signal to digital form stored in memory (like ROM), read by the microcontroller, analog music into electrical signals (similar to the sound card). In large circuits, modular applications that greatly reduce the volume, simplifies the circuit and reduce the damage, error rate, but also easy 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文中外 文獻 9 to replace. 7. Microcontroller in the application field of automotive equipment SCM in automotive electronics is widely used, such as a vehicle engine controller, CAN busbased Intelligent Electronic Control Engine, GPS navigation system, abs antilock braking system, brake system, etc.. In addition, the MCU in business, finance, research, education, national defense, aerospace and other fields has a very wide range of applications. 外文參考資料二 ： Abstract: In order to solve the weight problem often encountered in measuring the lowmass objects in the trade and daily life of the modern business, the design of a new pocketsized electronic scales. This pocketsized electronic scales Force Sensor gravity signals into electrical signals to measure, and measuring the results of the digital display. The pocketsized electronic scales with a small size, light weight, easy to carry, intuitive display, measurement and high precision。 plex structure, the cost disadvantages. This article focuses on the load cell works, error pensation, the main parameters of selection. And the technical and economic analysis. Keywords: pocketsized electronic scales。 weighing。 sensor。 error 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文中外 文獻 10 pensationCLC number: TH715. 1] sign code: A Article ID: 100 522 895 (2021) 0220210204 1 A needs analysisIn modern merce and trade and everyday life, often encounter the problem of measuring the weight of the lowmass objects. Although the traditional steelyard can solve this problem, but inconvenient to carry, the efficiency is not high, the display is not intuitive and low measurement accuracy。 mechanical spring balance can solve this problem, but the inertia inherent low frequency, high sensitivity, measurement accuracy is not high. With the progress and update of the microputer technology, integrated circuit technology, sensor technology, electronic scales rapid development, it has a responsive, high accuracy, fully functional, the display is intuitive, pact, easy to use and so on. For these reasons, in order to solve the lowmass objects weighing problem, if a small size, light weight, portable, digital display electronic scales, will be popular. Discussed below, that is, the scope of a weighing 5 kg pact electronic DesignThe principle of the structure of the pocketsized electronic scales shown in Figure 1. The main task is to design pact electronic scales weighing the choice of the force sensors. Dynamometer sensor types to achieve the weighing and digital display, the key is to want to force (gravity) signals into electrical signals to measure method is mainly divided into two categories: one is the direct method, namely the use of pressure magic sensor, piezoelectric sensor, Piezoresistive sensors directly to the force signal converted into electrical 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文中外 文獻 11 signals。 the other is the indirect method, the elastic element as the sensor will pull, pressure changes in strain, displacement, or frequency, and then strain sensors, displacement sensors, or frequency sensor strain, displacement or frequency changes for power. Comprehensive parison of a variety of sensors, use the indirect method of strain gauge force electronic scale structural principle: Sensor → amplifier → CPU → display → A246。D converter 3 sensor device worksThe working principle of the strain gauge force transducer strain gauge pasted into force, forcesensitive elastic element, the corresponding strain when the elastic element force deformation, the strain gauge into a resistance change, which led to the voltage measuring circuit changes by measuring the output voltage value, and then through the conversion can be obtained by the measurement of body weight. Since the pocketsized electronic scales require small size, weighing in scope, precision and angle even consistency, sensor and display integration, it is selected parallel to the two holes cantilever beam strain gauge loadbearing sensor. Its characteristics are: high precision, ease of processing, simple and pact structure, strong resistance to partial load, high natural gauge choice of a metal palisade metal mooring paste on the insulating substrate parked strain gages, mechanical strain resistance strain gauge feelings generally 10 10 2mm, the resistance rate of change of the attendant about 10 6 10 2 orders of magnitude, such a small change in resistance measured using the general resistance of the instrument is hard to measure out, you must 河南理工大學(xué)萬方科技學(xué)院本科畢業(yè)論文中外 文獻 12 use some form of mea