測(cè)控技術(shù)與儀器 外文文獻(xiàn) 外文翻譯 英文文獻(xiàn) 電子秤

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1、Electronic scales 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

2、 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: na

3、me, price, weight, etc. 11 list in this small electronic label. Greatly accelerated the use 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 Classificat

4、ion (scales can be divided into mechanical and electronic type) 1． How it works: electronic works in electronic components (weighing sensor, AD conversion circuit, microcontroller circuits, display circuit, keyboard circuitry, communications interface circuits, regulated power supply circuit circui

5、t. 2． using the function: electronic weighing the use of modern sensor 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

6、 error, to make it more in line with the management of legal metrology and industrial production process control applications. 3. Three health scales are weighing the use of features in a category (divided into mechanical and electronic), inexpensive, it can help people to effectively monitor the

7、ir 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

8、 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 sector, weighing very precise. Block diagram interpretation of the principle

9、 of electronic balance The first part of the electronic scale principle block diagram: 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 sensor that occurred def

10、ormation, so that resistance to change, while the use 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 k

11、eyboard commands and program output to display this result. Until the show such a result. The second 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 Scal

12、es Weighing Scale Pricing Scale 3. Purpose: 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

13、-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 acc

14、uracy 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 woul

15、d 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 sense of quantity: a single electronic scales can show the smallest scale; usually "d" to represent; 7. an

16、alytic 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 used to achieve the targets of the time; 10. Accuracy: Th

17、e full name of a sense of volume and volume ratios; 11. electronic scale use 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-

18、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

19、small; 9. installation, calibration simple; 10. special industry, can be accessed 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

20、. Whether the boot: the boot sequence 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 use; 6. parts are complete; Part VIII sensor type: 1. Resistive: affordable, high accuracy, widely used; 2.

21、 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, ver

22、y 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; sensor characteristics: 1. rated load; 2. output sensitivity; 3. non-linear; 4. hysteresis; 5. repeatable; 6.

23、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 sensor damaged phenomenon: 1. Weighing not allowed; 2. Shows no return to zero; 3. Shows the number o

24、f bounce to judge the sensor + E,-E, + S,-S 1. The first to use resistance profile measurement 4-line 22 This resistance value, a total of 6 groups. The case 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 termi

25、nated on the + 1.5V voltage Sensor correctly to exert a pressure, such as the output + _S increase, 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 series doe

26、s 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) 6. can set the weight, the maximum amount of warning function; 7. automatic zero tracking, temper

27、ature 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

28、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

29、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 self-extinguishing characteristics. Mechanical scales, floor scale / land in the value (car value),

30、weigh-bridges and other fitted force-sensitive sensors and microcomputer-controlled intelligent weighing instruments become intelligent digital electrical and mechanical balance (or the mechanical and electrical dual-use scales), to improve the mechanical balance of the measurement accuracy, with lo

31、w 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 valuation-based), auto-zeroing, auto-tracking

32、 and other functions. Weighing data can be directly printed or transmitted via computer networks, 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 bas

33、ically 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

34、, 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

35、 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

36、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 organ that can detect and feel the outside of the signal, physical condition (such as light, heat, humidity) or chemical composition (such as smok

37、e), and Discovery of information to other devices or organs. Definition of sensor National standard GB7665-87 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 composed of sensitive componen

38、ts 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, process

39、ing, 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 organs. And rely on people's own sense organs, the study of natural phenomena

40、 and laws, and production activities in their functions on far enough. To meet this situation, we need sensors. It can be said sensor is an extension of human senses, also known as electronic features. The arrival of the new technological revolution, the world entered the information age. In the co

41、urse of the use of information, we must first resolve is to obtain accurate and reliable information, and sensors is to obtain information in the field of natural and production of the main ways and means. In modern industrial production, especially automated production process, the use of various

42、sensors to monitor and control the various parameters of the production process, so that devices work best in the normal state or condition, and to achieve the best quality products. Therefore we can say, without a large number of good sensors, modern production base will be lost. In the basic scie

43、nce research, a more prominent position sensor. The development of modern science and technology into many new areas: for example, thousands of light years to observe the macro level of the vast universe, to observe microscopically small particles cm the world, vertical, to observe the evolution ove

44、r hundreds of years of celestial bodies , a short response to the s moment. In addition, there was even a matter of deepening understanding, developing new energy, new materials, play an important role in a variety of extreme technology such as ultra-high temperature, ultra-low temperature, high pre

45、ssure, ultra-high vacuum, powerful magnetic field, ultra-weak magnetic bagging, etc. . Obviously, to obtain a large number of human senses can not directly access the information, Not compatible with sensors is impossible. Many basic scientific research obstacles, first of all to obtain information

46、 on the object is difficult, and a new highly sensitive detection mechanism and the emergence of sensors, often lead to breakthroughs in the field. The development of a number of sensors is often a pioneer in the development of marginal subjects. Sensor has already penetrated into, such as industri

47、al production, space development, marine exploration, environmental protection, resource survey, medical diagnostics, biotechnology, and even conservation areas and so most of the pan. It is no exaggeration to say that, from the vast space, the vastness of the ocean, as well as a variety of complex

48、engineering systems, almost every modern project, are inseparable from a variety of sensors. Thus, the sensor technology in economic development, promote the important role of social progress is very clear. Countries in the world attach great importance to the development of this area. I believe in

49、 the near future, there will be a leap in sensor technology, to achieve status commensurate with its important new level. 　　 Sensor classification Different views can be classified on the sensors: they transform principle (Transducer on the basic physical or chemical effect); their purpose; their

50、 output signal types and the production of their materials and processes. Working principle of the sensor can be divided into physical sensors and chemical sensors two categories: Sensor working principle of the classification of physical sensors that physical effects, such as the piezoelectric ef

51、fect, magnetostriction, ionization, polarization, thermal, optical, magnetic and electric effects. Small changes in the amount of the measured signal will be converted into electrical signals. Chemical sensors, including those with chemical adsorption, electrochemical reaction, a causal relationshi

52、p between the phenomenon of the sensor, the measured signal will be small changes in volume converted to electrical signals. Some sensors can not divided into physics, can not be divided into chemical classes. Most of the physics-based sensor is functioning. Many problems of chemical sensor technol

53、ogy, such as reliability issues, the possibility of mass production, prices, etc., solve such problems, the application of chemical sensors will have tremendous growth. Dynamic characteristic The so-called dynamic characteristics, is the change in the input sensor, its output characteristics. In p

54、ractice, the sensor's dynamic characteristics common 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 t

55、he relationship, often the latter that the former can be presumed. The most commonly used standard input signal and sine signal with step two, so the dynamic characteristics of sensors are commonly used in the step response and frequency response to that. 電子秤 電子秤是稱重技術(shù)中的一種新型儀表，廣泛應(yīng)用于各種場(chǎng)合。電子秤與機(jī)械秤比擬

56、有體積小、重量輕、結(jié)構(gòu)簡(jiǎn)單、價(jià)格低、實(shí)用價(jià)值強(qiáng)、維護(hù)方便等特點(diǎn)，可在各種環(huán)境工作，重量信號(hào)可遠(yuǎn)傳，易于實(shí)現(xiàn)重量顯示數(shù)字化，易于與計(jì)算機(jī)聯(lián)網(wǎng)，實(shí)現(xiàn)生產(chǎn)過(guò)程自動(dòng)化，提高勞動(dòng)生產(chǎn)率。標(biāo)簽秤在超市中的應(yīng)用已經(jīng)是耳聞目睹的了。一張小小的標(biāo)簽包含著：品名、價(jià)格、重量等，一一列表在這小小的電子標(biāo)簽上。標(biāo)簽機(jī)的使用大大加快了銷售速度，也方便了顧客。頂尖條碼標(biāo)簽秤有著許多卓越的特點(diǎn)，以太網(wǎng)功能使管理更加方便。 電子秤的分類(衡器可以分為機(jī)械式和電子式) 1 工作原理：電子式的工作原理以電子元件〔稱重傳感器，AD轉(zhuǎn)換電路，單片機(jī)電路，顯示電路，鍵盤(pán)電路，通訊接口電路，穩(wěn)壓電源電路等電路組成。 2 使用功能

57、：電子衡器采用現(xiàn)代傳感器技術(shù)、電子技術(shù)和計(jì)算機(jī)技術(shù)一體化的電子稱量裝置，才能滿足并解決現(xiàn)實(shí)生活中提出的"快速、準(zhǔn)確、連續(xù)、自動(dòng)"稱量要求，同時(shí)有效地消除人為誤差，使之更符合法制計(jì)量管理和工業(yè)生產(chǎn)過(guò)程控制的應(yīng)用要求。 3 健康秤是衡器使用功能中的一個(gè)分類〔分為機(jī)械式和電子式〕，物美價(jià)廉，它可以幫助人們有效的監(jiān)視自己的體重變化，新產(chǎn)品還可以檢測(cè)自己的脂肪含量，而且還有一些人性化的附屬功能。可能不屬于計(jì)量器具。 4 電子衡器是國(guó)家強(qiáng)制檢定的計(jì)量器具，他的合格產(chǎn)品是有檢定分度值e和細(xì)分值D的標(biāo)準(zhǔn)，是受?chē)?guó)家計(jì)量法保護(hù)的產(chǎn)品。在電子衡器分類中有一種叫“人體秤〞的產(chǎn)品，它可以在計(jì)量部門(mén)進(jìn)行檢定，稱重

58、很精確。 電子秤的原理方框圖解讀 第一局部 電子秤的原理方框圖: 程式???? K/B(按鍵)?? ↑ Fx → 傳感器 → OP放大 → A/D轉(zhuǎn)換 → CPU → 顯示驅(qū)動(dòng) → 顯示屏???????????????記憶體 工作流程說(shuō)明： 當(dāng)物體放在秤盤(pán)上時(shí)，壓力施給傳感器，該傳感器發(fā)生形變，從而使阻抗發(fā)生變化，同時(shí)使用鼓勵(lì)電壓發(fā)生變化，輸出一個(gè)變化的模擬信號(hào)。該信號(hào)經(jīng)放大電路放大輸出到模數(shù)轉(zhuǎn)換器。轉(zhuǎn)換成便于處理的數(shù)字信號(hào)輸出到CPU運(yùn)算控制。CPU根據(jù)鍵盤(pán)命令以及程序?qū)⑦@種結(jié)果輸出到顯示器。直至顯示這種結(jié)果。 第二局部 秤的分類： 1.按原理分：電子秤機(jī)械秤 機(jī)電結(jié)合秤

59、2.按功能分：計(jì)數(shù)秤 計(jì)價(jià)秤 計(jì)重秤 3.按用途分：工業(yè)秤商業(yè)秤 特種秤 第三局部 秤的種類： 1.桌面秤 指全稱量在30Kg以下的電子秤 2.臺(tái)秤 指全稱量在30-300Kg以內(nèi)的電子秤 3.地磅 指全稱量在300Kg以上的電子秤 4.精密天平 第四局部 按精確度分類： I級(jí)： 特種天平 精密度≥1/10萬(wàn) II級(jí)： 高精度天平 1/1萬(wàn)≤精密度＜1/10萬(wàn) III級(jí)： 中精度天平 1/1000≤精密度＜1/1萬(wàn) IV級(jí)： 普通秤 1/100≤精密度＜1/1000 第五局部 專業(yè)術(shù)語(yǔ)： 1.最大稱量： 一臺(tái)電子秤不計(jì)皮重，所能稱量的最大的載荷; 2.最小稱量：一臺(tái)電子秤在低于該值時(shí)會(huì)出

60、現(xiàn)的一個(gè)相對(duì)誤差; 3.平安載荷： 120%正常稱量范圍; 4.額定載荷： 正常稱量范圍; 5.允許誤差： 等級(jí)檢定時(shí)允許的最大偏差; 6.感量： 一臺(tái)電子秤所能顯示的最小刻度;通常用“d〞來(lái)表示; 7.解析量： 一臺(tái)具有計(jì)數(shù)功能的電子秤，所能分辯的最小刻度; 8.解析度： 一臺(tái)具有計(jì)數(shù)功能的電子秤，內(nèi)部具有分辯能力的一個(gè)參數(shù); 9.預(yù)熱時(shí)間：一臺(tái)秤到達(dá)各項(xiàng)指標(biāo)所用的時(shí)間; 10.精度： 感量與全稱量的比值; 11.電子秤使用環(huán)境溫度為： -10攝氏度 到 40攝氏度 12.臺(tái)秤的臺(tái)面規(guī)格：????? 25cm X 30cm??? 30cm X 40cm? 40cm

61、 X 50cm??? 42cm X 52cm??????45cm X 60cm 第六局部 電子秤的特點(diǎn)： 1.實(shí)現(xiàn)遠(yuǎn)距離操作; 2.實(shí)現(xiàn)自動(dòng)化控制; 3.數(shù)字顯示直觀、減小人為誤差; 4.準(zhǔn)確度高、分辯率強(qiáng); 5.稱量范圍廣; 6.特有功能：扣重、預(yù)扣重、歸零、累計(jì)、警示等; 7.維護(hù)簡(jiǎn)單; 8.體積小; 9.安裝、校正簡(jiǎn)單; 10.特種行業(yè)，可接打印機(jī)或電腦驅(qū)動(dòng); 11.智能化電子秤，反響快，效率高; 第七局部 電子秤檢查過(guò)程： 1.首先整體檢查：有無(wú)磨損和損壞; 2.能否開(kāi)機(jī)：開(kāi)機(jī)后是否從0到9依次顯示、數(shù)字是否模糊、能否歸零; 3.有無(wú)背光; 4.用砝碼測(cè)

62、試能否稱重; 5.充電器是否完好，能否使用; 6.配件是否齊全; 第八局部 傳感器類型： 1.電阻式：價(jià)格適中、精度高、使用廣泛; 2.電容式：體積小、精度低; 3.磁浮式：特高精度、造價(jià)高; 4.油壓式：現(xiàn)市場(chǎng)上已淘汰; 顯示器種類： 1.LCD〔液晶顯示〕：免插電、省電、附帶背光; 2.LED：免插電、耗電、很亮; 3.燈管：插電、耗電、很高; K/B〔按鍵〕類型： 1.薄膜按鍵：觸點(diǎn)式; 2.機(jī)械按鍵：由許多單獨(dú)按鍵組合在一起; 傳感器的特性： 1.額定載荷; 2.輸出靈敏度; 3.非線性; 4.滯后; 5.重復(fù)性; 6.蠕變; 7.零點(diǎn)輸出影響; 8.額定輸出溫度影響; 9.零點(diǎn)輸入

63、; 10.輸入阻抗; 11.輸出阻抗; 12.絕緣阻抗; 13.容許鼓勵(lì)電壓;(5-18V) 第九局部 傳感器損壞后現(xiàn)象： 1.稱量不準(zhǔn); 2.顯示不歸零; 3.顯示的數(shù)字亂跳 判斷傳感器的+E、-E、+S、-S 1.先用電阻檔測(cè)4條線兩兩這間的電阻值，共有6組。如為400-450歐那么為+E、-E;如果為350歐，那么為+S、-S;為290歐，那么為R橋臂; 2.在+E、-E端接上+_1.5V電壓， 傳感器正確施加一個(gè)壓力，如輸出+_S增大，那么紅表筆為+S，反之-S; 第十局部 高精度計(jì)數(shù)秤特點(diǎn)： 1.Kg/Ib單位轉(zhuǎn)換功能; 2.零點(diǎn)顯示范圍、調(diào)整功能(GLH系列沒(méi)有) 3.取樣速

64、度調(diào)節(jié)功能; 4.有10組單重記憶功能; 5.可同時(shí)進(jìn)行重量、數(shù)量、累計(jì)功能(GLH只有數(shù)量累計(jì)) 6.可設(shè)定重量、數(shù)量上限警示功能; 7.自動(dòng)零點(diǎn)追蹤、溫度線性校正; 8.扣重及預(yù)扣重功能; 9.待機(jī)功能; 10.有零點(diǎn)顯示范圍和零點(diǎn)跟蹤范圍; 11.有電池電壓管制限制功能; 電子秤是稱重技術(shù)中的一種新型儀表，廣泛應(yīng)用于各種場(chǎng)合。電子秤與機(jī)械秤比擬有體積小、重量輕、結(jié)構(gòu)簡(jiǎn)單、價(jià)格低、實(shí)用價(jià)值強(qiáng)、維護(hù)方便等特點(diǎn)，可在各種環(huán)境工作，重量信號(hào)可遠(yuǎn)傳，易于實(shí)現(xiàn)重量顯示數(shù)字化，易于與計(jì)算機(jī)聯(lián)網(wǎng)，實(shí)現(xiàn)生產(chǎn)過(guò)程自動(dòng)化，提高勞動(dòng)生產(chǎn)率。電子秤還具有自動(dòng)零點(diǎn)追蹤，超負(fù)荷顯示自動(dòng)熄滅之特點(diǎn)。 將機(jī)械磅秤、地

65、上衡/地中衡〔汽車(chē)衡〕、軌道衡等裝上力敏傳感器和單片機(jī)控制的智能稱重儀表即成為智能數(shù)字式機(jī)電秤〔或機(jī)電兩用秤〕，提高了機(jī)械秤的計(jì)量精度，具有造價(jià)低廉、可靠性高、安裝簡(jiǎn)單等特點(diǎn)，且不影響原機(jī)械秤任何傳力結(jié)構(gòu)。還有去皮、置零、累計(jì)次數(shù)、累計(jì)重量〔計(jì)價(jià)型的累計(jì)金額〕、零位自動(dòng)調(diào)整、自動(dòng)跟蹤等功能。稱重?cái)?shù)據(jù)可直接打印或經(jīng)計(jì)算機(jī)聯(lián)網(wǎng)傳送，工業(yè)用秤可提高工藝水平和產(chǎn)品質(zhì)量，商貿(mào)用秤可提高結(jié)算信譽(yù)，帶來(lái)不可估量的社會(huì)效益和經(jīng)濟(jì)效益。 電子秤根本上由傳感器、放大電路、A/D變換電路、單片機(jī)控制顯示局部、開(kāi)關(guān)矩陣電路、鍵盤(pán)電路及電源電路組成。傳感器將重量信號(hào)轉(zhuǎn)換為相應(yīng)的電信號(hào)，經(jīng)放大后送入A/D變換成脈沖數(shù)重

66、量，經(jīng)過(guò)單片機(jī)控制下將模擬電壓信號(hào)轉(zhuǎn)換成數(shù)字量。這個(gè)數(shù)字量經(jīng)單片機(jī)程序轉(zhuǎn)換成與實(shí)際重量一致的數(shù)字值送顯示窗顯示。 單片機(jī)同時(shí)對(duì)鍵盤(pán)及開(kāi)關(guān)矩陣進(jìn)行監(jiān)測(cè)。根據(jù)輸入的參數(shù)值，程序作出相應(yīng)的處理。電源電路提供各局部的工作電壓。微處理器采用如8050、HD404418F、8031等CPU。主板通用性很強(qiáng)，不同量程和分度值的秤，僅需調(diào)整主板上的跳線和撥碼開(kāi)關(guān)就可實(shí)現(xiàn)，唯一不同的是配用的傳感器的額定承載能力。 傳感器是一種物理裝置或生物器官，能夠探測(cè)、感受外界的信號(hào)、物理?xiàng)l件〔如光、熱、濕度〕或化學(xué)組成〔如煙霧〕，并將探知的信息傳遞給其他裝置或器官。 傳感器的定義 國(guó)家標(biāo)準(zhǔn)GB7665-87對(duì)傳感器下的定義是：“能感受規(guī)定的被測(cè)量并按照一定的規(guī)律轉(zhuǎn)換成可用信號(hào)的器件或裝置，通常由敏感元件和轉(zhuǎn)換元件組成〞。傳感器是一種檢測(cè)裝置，能感受到被測(cè)量的信息，并能將檢測(cè)感受到的信息，按一定規(guī)律變換成為電信號(hào)或其他所需形式的信息輸出，以滿足信息的傳輸、處理、存儲(chǔ)、顯示、記錄和控制等要求。它是實(shí)現(xiàn)自動(dòng)檢測(cè)和自動(dòng)控制的首要環(huán)節(jié)。 傳感器的作用 人們?yōu)榱藦耐饨绔@取信息，必須借助于感覺(jué)器官。而單靠人們自身的感覺(jué)