本科生毕业设计（论文）外文翻译癏毕业设计题目：基于单片机的电子称设计
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专业班级：
学生
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2011年3月9日
Electronic scales
Electronic scales are weighing technology in a new type of instrument is widely ud 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, easy-to-computer network, production automation, higher labor productivity. Scale labels in the supermarket is in the application of face value. A small label contains: name, price, weight,
etc. 11 list in this small electronic label. Greatly accelerated the u of label machine sales pace, but also convenient for customers. Top barcode labels have many remarkable features of scale, Ethernet feature makes the management more convenient.
Electronic Scale Classification (scales can be divided into mechanical and electronic type)
1．How it works: electronic works in electronic components (weighing nsor, AD conversion circuit, microcontroller circuits, display circuit, keyboard circuitry, communications interface circuits, regulated power supply circuit circuit.
口蘑炒肉片2．using the function: electronic weighing the u of modern nsor technology, electronics and computer technology integration, electronic weighing devices, in order to meet and solve real life's "fast, accurate, continuous, automatic" weighing requirements, while effectively eliminating human error, to make it more in line with the management of legal metrology and industrial production process control applications.
中国统计年鉴官网
3. Three health scales are weighing the u of features in a category (divided into mechanical and electronic), inexpensive, it can help people to effectively monitor their own body weight changes, new products also can detect their fat content, but also Some human-oriented subsidiary functions.
May not be part of measuring equipment.
4．Electronic Scale is a measurement of the state compulsory test apparatus, and his qualified products are test indexing the value of D values of e and subdivision standards, is subject to the protection of the national metrology products. In the electronic weighing there is a category called "human scale" products, which can test in the measurement ctor, weighing very preci.
Block diagram interpretation of the principle of electronic balance
The first part of the electronic scale principle block diagram:
非典型孤独Program K / B (button) ↑ Fx → Sensors → OP Zoom → A / D converter →CPU → → display driver display memory
Workflow Note: When an object on the pan when the pressure facilities to the nsor that occurred deformation, so that resistance to change, while the u of excitation voltage changes, the output of a change in analog signal. This signal amplification by the amplifier output to the ADC. Converted to facilitate the processing of the digital signal output to the CPU operator control. CPU under the keyboard commands and program output to display this result. Until the show such a result.
穿衣比赛
客服回复话术>嚼烂The cond part of the scale of the classification: 1. According to principles of points: E-scale mechanical scale mechanical and electrical integration scales 2. According to the functions sub: Counting Scales Weighing Scale Pricing Scale 3. Purpo: Industrial Commercial Scales Special Scales Balance
The third part of the scale types: 1. The full name of the desktop Scale refers to the volume of less than 30Kg electronic scale 2. The full name of platform scale refers to the volume within the 30-300Kg Electronic Scale 3. Loadometer full name refers to the volume of more than 300Kg Electronic Scale 4. Precision Balance
4th Part of the accuracy of classification: I Class: Special scales precision ≥ 1 / 10 Wan II level: high-precision scale 1 / 10000 ≤ precision of "1 / 100,000 III: the accuracy of scale 1 / 1000 ≤ precision of "1 / 10000 Class IV: Common Scale 1 / 100 ≤ precision of" 1 / 1000
Part V of professional terminology: 1. Maximum weighing: an electron balance, excluding tare weight, the maximum load can weigh; 2. Minimum weigh: a electronic scales below the value that would have occurred when a relatively error; 3. safe load: 120% of the normal weighing range; 4. Rated load: normal weighing range; 5. permissible error: class test when the maximum deviation; 6.
a n of quantity: a single electronic scales can show the smallest scale; usually "d" to reprent; 7. analytic capacity: a function with a count of the electronic scales, can distinguish the smallest scale; 8. Resolution: a counting function with an electronic scale, the internal capacity of a Resolution of a parameter; 9.
Warm-up time: a scale ud to achieve the targets of the time; 10. Accuracy: The full name of a n of volume and volume ratios; 11. electronic scale u of environmental temperature: -10 degrees Celsius to 40 degrees Celsius 12. platform scale The table size: 25cm X 30cm 30cm X 40cm 40cm X 50cm 42cm X 52cm
45cm X 60cm
Part VI electronic scale features: 1. To achieve long-distance operations; 2. To achieve automatic control; 3. Figures show that an intuitive, reduce human error; 4. High accuracy and resolution strong; 5. Weighing range is wide; 6 . unique features: buckle weight, withholding weight, zero, accumulated, warning, etc.; 7. maintenance simple; 8. size is small; 9. installation, calibration simple; 10. special industry, can be accesd by the printer or computer-driven; 11. Intelligent electronic scale, quick reaction, high efficiency; Part VII of the electronic scale
inspection process: 1. First, the overall examination: whether the wear and tear; 2. Whether the boot: the boot quence is from 0 to 9 in turn shows that figures are vague, can zero; 3. Whether the backlight ; 4. with the weight tests in weighing; 5. chargers is intact, can u; 6. parts are complete; Part VIII nsor type: 1. Resistive: affordable, high accuracy, widely ud; 2. Capacitive: small size, low precision; 3. Maglev-style: special high-precision, high cost; 4. Hydraulic formula: the current the market has been eliminated; Display Type: 1.LCD (liquid crystal display): free electricity, energy-saving, with backlight; 2.LED: free electricity, power consumption, very bright; 3. Lamp: electricity, power consumption , high; K / B (button) type: 1. film button: contact type; 2. mechanical buttons: made up of many individual combinations of keys together; nsor characteristics: 1. rated load; 2. output nsitivity; 3. non-linear; 4. hysteresis; 5. repeatable; 6. creep; 7. 12:00 output effects; 8. rated output temperature; 9. 12:00 input; 10. input impedance; 11. output impedance; 12. Insulation Resistance ; 13. to allow excitation voltage; (5-18V)
Part IX nsor damaged phenomenon: 1. Weighing not allowed; 2. Shows no return to zero; 3. Shows the number of bounce to judge the nsor + E,-E, + S,-S 1. The first to u resistance profile measurement 4-line 22 This resistance value, a total of 6 groups. The ca of 400-450, compared with Europe + E,-E; if it is 350 in Europe, compared to + S,-S; for the 290 in Europe, compared to R-arm; 2. + E,-E terminated on the + 1.5V voltage
Sensor correctly to exert a pressure, such as the output + _S increa, then the red table pens as + S, the contrary-S; 10th part of the high-precision counting scale features: 1.Kg/Ib unit conversion functions; 2. 12:00 display range adjustment function (GLH ries does not) 3. Sampling speed adjustment function;
4. There are 10 groups memory function singlet;
5. may be at the same time the weight, quantity, the cumulative function (GLH only the number of cumulative)
聊城旅游景点
6. can t the weight, the maximum amount of warning function;
7. automatic zero tracking, temperature linear correction;
8. deduction of withholding heavy weight and function;
9. Standby function; 10. there is zero shows zero tracking range and scope; 11. there is the battery voltage control to limit the function; Electronic scales are weighing technology in a new type of instrument is widely ud in various occasions. Electronic scales and mechanical scales have more small size, light weight, simple structure, low price and practical value of strong, convenient mainten
ance 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,
easy-to-computer networking, process automation of production and improve labor productivity. Electronic Scale also has an automatic zero tracking, overload display of lf-extinguishing characteristics.
Mechanical scales, floor scale / land in the value (car value), weigh-bridges and other fitted force-nsitive nsors and microcomputer-controlled intelligent weighing instruments become intelligent digital electrical and mechanical balance (or the mechanical and electrical dual-u 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, t to zero, the cumulative number of times, the cumulative weight (cumulative amount of valuation-bad), auto-zeroing, auto-tracking and other functions. Weighing data can be directly printed or transmitted via computer networks, industrial process 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 nsor, amplifier circuit, A / D conversion circuit, microcontroller control of display parts, switch matrix circuit, the keyboard circuit and power circuit. Weight nsor signals are converted to a corresponding electrical signal, after amplified into the A / D converted into puls 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 nding 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 sub-degree scales, just adjust the jumpers on the motherboard and the DIP switch can be achieved, the only difference is that the nsor ud with a rated carrying capacity
Sensor is a physical device or biological organ that can detect and feel the outside of the signal, physical condition (such as light, heat, humidity) or chemical composition (such as smoke), and Discovery of information to other devices or organs. Definition of nsor
急中生智造句
National standard GB7665-87 nsor is defined as: "can feel the requirements are measured and converted in accordance with the laws of certain signal device or devices available, usually compod of nsitive components and conversion devices." Sensor is a detection device, can feel the information being measured, and can detect n 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 nsor
People in order to obtain information from the outside world must help of n organs. And rely on people's own n organs, the study of natural phenomena and laws, and production activities in their functions on far enough. To meet this situation, we need nsors. It can be said nsor is an extension of human ns, also known as electronic features.
The arrival of the new technological revolution, the world entered the information age. In the cour of the u of information, we must first resolve is to obtain accurate and reliable information, and nsors is to obtain information in
