【正文】 does not) 3. Sampling speed adjustment function。 8. deduction of withholding heavy weight and function。 Electronic scales are weighing technology in a new type of instrument is widely used in various occasions. Electronic scales and mechanical scales have more small size, light weight, simple structure, low price and practical value of strong, convenient maintenance and so on can be in a variety of environmental work, the weight of the signal can be Remote, the weight of display is easy to implement digital, easytoputer working, process automation of production and improve labor productivity. Electronic Scale also has an automatic zero tracking, overload display of selfextinguishing characteristics. Mechanical scales, floor scale / land in the value (car value), weighbridges and other fitted forcesensitive sensors and microputercontrolled intelligent weighing instruments bee intelligent digital electrical and mechanical balance (or the mechanical and electrical dualuse scales), to improve the mechanical balance of the measurement accuracy, with low cost, high reliability, simple installation and so on, without prejudice to the original mechanical scales to any transmission bearing structure. There are peeled, set to zero, the cumulative number of times, the cumulative weight (cumulative amount of valuationbased), autozeroing, autotracking and other functions. Weighing data can be directly printed or transmitted via puter works, industrial processes can improve the level of scale and product quality, trade clearing with the scale can improve the credibility of incalculable social and economic benefits. Electronic Scale is basically a sensor, amplifier circuit, A / D conversion circuit, microcontroller control of display parts, switch matrix circuit, the keyboard circuit and power circuit. Weight sensor signals are converted to a corresponding electrical signal, after amplified into the A / D converted into pulses weight, through the SCM under the control of the analog voltage signals into digital. The digital conversion by the SCM program in line with the actual weight of the value of sending the number of display windows. MCU at the same time the keyboard and switch matrix for monitoring. According to the input parameter values, the program handled accordingly. Power circuit to provide the various parts of the operating voltage. Microprocessors such as 8050, HD404418F, 8031, etc. CPU. Highly versatile motherboard, different values of range and subdegree scales, just adjust the jumpers on the motherboard and the DIP switch can be achieved, the only difference is that the sensor used with a rated carrying capacity Sensor is a physical device or biological an that can detect and feel the outside of the signal, physical condition (such as light, heat, humidity) or chemical position (such as smoke), and Discovery of information to other devices or ans. Definition of sensor National standard GB766587 sensor is defined as: can feel the requirements are measured and converted in accordance with the laws of certain signal device or devices available, usually posed of sensitive ponents and conversion devices. Sensor is a detection device, can feel the information being measured, and can detect sense of information, according to certain laws of transformation into electrical signals, or other forms of information required for output to meet the information transmission, processing, storage, display, recording and control requirements. It is the automatic detection and control of the primary link. The role of sensor People in order to obtain information from the outside world must help of sense ans. And rely on people39。s dynamic characteristics mon to certain standards of its response to said input signal. This is because the sensor response to the standard input signal easily obtained by experiment, and its standard input signal response and its response to any input signal exists between the relationship, often the latter that the former can be presumed. The most monly used standard input signal and sine signal with step two, so the dynamic characteristics of sensors are monly used in the step response and frequency response to that.