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 Wysłany: Czw 7:45, 09 Gru 2010 Temat postu: stivali ugg 1 kind of high-precision temperature c |
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1 kind of high-precision temperature controller
Stable performance, high accuracy, simple structure and so on. Key words temperature sensor temperature management structure will pay attention ----- a, - a principle of the system 1 shown in Figure 1. Sensor signal in order to feel the form of output voltage adjusted by the magnification provided to the A / D converter, drive LED digital display shows measurement arm. Obtained by setting the temperature control signal output to drive the power device in Figure 1 Temperature Controller Circuit Diagram 1.1 sensor used in this system, Analog Devices recently introduced electronic temperature sensor and controller integrated monolithic TMP a 01. The device features a measuring range is 55 ~ +150 ℃. The whole temperature range t 2 ℃ with excellent precision linear,[link widoczny dla zalogowanych], voltage output, operating voltage 4.5 ~ 2.5V, quiescent current of ~ 00mA, temperature coefficient of 5mV / K 25 ℃, the output of a voltage value of 1. 49V. The principle structure shown in Figure 2. I end devices provide a stable 2.5V reference voltage, voltage after the input signal as the set temperature when the 7-side when the overload level conversion. To l995-03-31 Received 1995-05-04 Revised reader services, animal husbandry, quotes Picasso: 2】 6r \ Aviation Metrology & Measurement Technology 1996 16 Figure 2TMP01 like structure diagram of rated volume level 5 client conversion. OC 6,7 b-side are set out. But for the precise temperature FMPOl components. Should make it as small as possible since the increase. Therefore f] tf1 preferably less than the output current 20mA. Temperature within the chip package per Bian, the temperature into voltage signal, amplified by the 5-ended output 2, adjust the temperature and column elements according to the technical indicators: temperature coefficient of 5mV / K,[link widoczny dla zalogowanych], 2j 【1.49V when the power of any value from the approximate formula: K = (273 Mou c) K can be obtained in Table 1 and the closed curve:. Take 1 or 55 ~} 25t, the corresponding output voltage] 090 ~ t996m. (F ¨ Electric Ju 1365raV. A / I / converter input signal. 2C00mV. Corresponding to the display = 1999. If set to fall == 2009mV who 200c of the sensor output voltage signal is required to move the Bangladesh population level signal amplification processing A, the subtractor when when R = R =, = 2 a v! == \Figure 3 0C output corresponding to 0mV. A device to amplify the corresponding word section 125c of the sensor output voltage signal. The post-translational processing 625mV, subject the show as a 125c. the A tinkling) in the input signal should be 1250mV eight is 2 times the signal can be amplified. In order to obtain a stable signal with the energy gap y! I.M336-3.5V power supply for its power supply, adjust Ⅳ I make r = 1365mY / 2:3 display enlarged adjusted drive signals to the A / D conversion. instrument uses a double integral A / D converter TCL7107. The device anti-interference ability. performance, stability, direct-drive LED digital display. RC,[link widoczny dla zalogowanych], c are integral resistor and capacitor. Cz as the base capacitance, clock oscillator by the R;, C and inverter chip form. clock frequency of a o.455/R9CI ≈ 48kHz,[link widoczny dla zalogowanych], instrument measuring rate of MR a l, 16o00 ≈ 3 times. t anti-interference ability to improve the instrument in the simulation output were terminated by the R \when the reference voltage is 100mV. Show full profile persons 200mV input 4 Conclusion The pressure range is a j5 ~ 1-125 ℃, the calibration error I. 2 ~ 6c, linear error C4 ~ 10 ℃, the working temperature range can be achieved consolidated intensive Wang 2C. Meter relay control output connected, the power MOSFET. SCR. Linton tubes selected to apply to the control of various drives.
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