CN102419281A - NIR (near-infrared spectrum) sample heating controller - Google Patents
NIR (near-infrared spectrum) sample heating controller Download PDFInfo
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- CN102419281A CN102419281A CN201110260438XA CN201110260438A CN102419281A CN 102419281 A CN102419281 A CN 102419281A CN 201110260438X A CN201110260438X A CN 201110260438XA CN 201110260438 A CN201110260438 A CN 201110260438A CN 102419281 A CN102419281 A CN 102419281A
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Abstract
The invention discloses a NIR (near-infrared spectrum) sample heating controller which comprises a controller cabinet, a circuit device module, a heating slot, a control panel and a power switch, wherein the circuit device module is arranged in the controller cabinet, and the heating slot, the control panel and the power switch are arranged on the external side face of the controller cabinet; the circuit device module comprises a single-chip microcomputer, a voltage amplifier, a relay, a pulse output circuit module, a heater, a heating module and an AD (analog to digital) signal converter, wherein the voltage amplifier, the relay, the pulse output circuit module, the heater, the heating module and the AD signal converter are sequentially connected; and the input end of the voltage amplifier is connected with the output end of the single-chip microcomputer, the output end of the AD signal converter is connected with the input end of the single-chip microcomputer, and the single-chip microcomputer is also connected with a liquid crystal display. Through adopting an advanced microcomputer controlled chip, an advanced expert PID (proportion integration differentiation) control algorithm and a fuzzy control hybrid mode, the controller disclosed by the invention has a high-precision self-tuning function; and a temperature sensor is a thermo resistor, therefore, the temperature sensor is large in measurement range, high in measurement accuracy, good in dynamic performance, quick in temperature rising, and small in steady-state error; meanwhile, the controller has the advantages of simple and reliable structure, easy manufacturing and low cost, and the like.
Description
Technical field
The present invention relates to a kind of sample heating controller, particularly a kind of near infrared spectrum sample heating controller.
Background technology
Near infrared spectrometer (Near Infrared; NIR) be between visible light (Vis) and in electromagnetic radiation as waves between infrared (MIR); U.S. material detect association (ASTM) nearly infrared spectral region be defined as the zone of 780-2526nm, be first non-visible light district that people find in absorption spectrum.The uptake zone of sum of fundamental frequencies and frequencys multiplication at different levels that contains hydrogen group (OH, NH, CH) vibration near infrared spectrum district and the organic molecule is consistent; Through the near infrared spectrum of scanning samples, can obtain that organic molecule contains the characteristic information of hydrogen group in the sample, and utilize the near-infrared spectrum technique analytic sample have easily and fast, efficiently, accurately lower with cost; Do not destroy sample; Do not consume chemical reagent, advantage such as free from environmental pollution, so this technology receives more and more people's favor.
The development course that near-infrared spectral analysis technology has passed through nearly half a century has become one of analytical technology that the application future is arranged most in the new century at present; Many countries have set up the research and development that special scientific research strength is carried out related application field instrument and equipment at present, lowering apparatus cost and keep enough analytical performances to become the dominant direction of current nir instrument development.
Yet; Because near infrared light spectral coverage absorption spectra is extremely complicated; Signal is more weak, and the fltting speed that is widely used in the accurate detection of each row is always very slow, and existing near infrared spectrum does not have supporting well heater; Even outer well heater is arranged, but problems such as these well heaters exist usually that anti-interference is weak, reliability is low, the heating-up time is long and temperature control precision is low.
Summary of the invention
The objective of the invention is to problem and shortage, the near infrared spectrum sample that a kind of antijamming capability is strong, reliability is high, the heating-up time is short, temperature control precision is high and measuring accuracy is high heating controller is provided to above-mentioned existence.
Technical scheme of the present invention is achieved in that
Near infrared spectrum sample heating controller of the present invention; Comprise controller box, be arranged on the circuit appliance module in the controller box and be arranged on heating tank, control panel and the power switch on the controller box lateral surface; It is characterized in that said circuit appliance module comprises single-chip microcomputer and the voltage amplifier, relay, impulse output circuit module, well heater, heating module and the AD signal converter that connect successively; Wherein the input end of voltage amplifier is connected with the output terminal of single-chip microcomputer; The output terminal of AD signal converter is connected with the input end of single-chip microcomputer, also is connected with LCD on the said single-chip microcomputer.
In order to ensure the good reliability of data protection function, outage can be preserved, and above-mentioned single-chip microcomputer is the mixed-signal system MCU chip of high integration, and the inside of this chip is provided with the FLASH storer of a 8K+128 byte.
In order to reduce the traditional relay probability that there was a mechanical failure, to guarantee the normal use of heating controller, above-mentioned relay is a solid-state relay.
Vibrate for holding circuit is without prejudice and can self produces, be provided with WatchDog Timer and clock oscillator in the above-mentioned controller box.
The present invention has following beneficial effect:
1, adopts advanced microcomputerized control chip, advanced person's expert PID control algorithm and fuzzy control hybrid mode, have high-precision self-setting function;
2, temperature sensor is a thermal resistance, and measurement range is big, and measurement range is-200 ~ 600 ℃, and can survey scope and also can expand;
3, measuring accuracy is high, can reach 0.1 ℃;
4, dynamic property is better, and overshoot is no more than 2%, and the adjusting time is controlled less than 300s;
5, temperature rises soon, and the rise time is less than 60s;
6, steady-state error is little;
7, have simple and reliable for structure, easily manufactured and low cost and other advantages.
Below in conjunction with accompanying drawing the present invention is further described.
Description of drawings
Fig. 1 is a Facad structure synoptic diagram of the present invention.
Fig. 2 is a structure synoptic diagram of the present invention.
Fig. 3 is a top surface structure synoptic diagram of the present invention.
Fig. 4 is a circuit appliance module block diagram of the present invention.
Fig. 5 is a software flow pattern of the present invention.
Embodiment
Like Fig. 1-shown in Figure 4; Near infrared spectrum sample heating controller of the present invention; Comprise controller box 1, be arranged on the circuit appliance module in the controller box 1 and be arranged on heating tank 2, control panel 3 and the power switch 4 on controller box 1 lateral surface; Wherein the circuit appliance module comprises single-chip microcomputer and the voltage amplifier, relay, impulse output circuit module, well heater, heating module and the AD signal converter that connect successively; Wherein the input end of voltage amplifier is connected with the output terminal of single-chip microcomputer, and the output terminal of AD signal converter is connected with the input end of single-chip microcomputer, and also is connected with LCD on the single-chip microcomputer.Wherein, well heater is electric furnace heating wire or other heatable carrier, and heating tank 2 is arranged on the end face of controller box 1.In order to ensure the good reliability of data protection function, outage can be preserved, and single-chip microcomputer is the mixed-signal system MCU chip of high integration; The inside of this chip is provided with the FLASH storer of a 8K+128 byte, and single-chip microcomputer disposes P0, P1, P2, four I/O interfaces of P3, and wherein P0 is the output signaling interface; P1 is the liquid crystal data-interface; P2 is the liquid crystal control interface, and P3 is the input signal interface, and is as shown in Figure 4; The input end of voltage amplifier is to be connected with P0 output signaling interface, and the AD signal converter is to be connected with P3 input signal interface.And relay is solid-state relay (SSR), because solid-state relay has the contactless electronic beam switch of isolation features, no mechanical contact component in switching process; Therefore significantly reduced the traditional relay probability that there was a mechanical failure; But also having the logical circuit compatibility, power input is little, and is highly sensitive; Power controlling is little, noise low with characteristics such as frequency of operation height.For being without prejudice and can self producing, holding circuit vibrates; Be provided with WatchDog Timer and clock oscillator in the controller box 1; Wherein WatchDog Timer is used for controlling the output pulse width ratio, adopts clock oscillator to realize inner crystal oscillator, helps guaranteeing synchronous with the AD signal converter all the time.And the AD signal converter is 14 a analog to digital converter, by the single power supply of 3MHz; Input reference noise 0.36LSB; Built-in accurate sampling hold circuit and reference data voltage; The power supply of+5V power supply, low in energy consumption; Binary coding is adopted in numeral output, can directly supply single-chip microcomputer to use.During use; The output signal and the energy supply of well heater received pulse output circuit module are the sample heating, when when firing equipment heats or be to be heated; Temperature sensor on the heating module collects temperature signal and passes to the AD signal converter; The AD signal converter will input to single-chip microcomputer after will receiving temperature signal and be converted into the discernible signal of single-chip microcomputer from heater module, and single-chip microcomputer receives the signal that the AD signal converter spreads out of; Through comparing and measuring value and setting value is made judgement, and send next instruction.And the impulse output circuit module is to adopt feedback model; Negative voltage is inputed to voltage amplifier; Make voltage amplifier export to oscillating circuit through reverse amplification, this oscillating circuit comprises rectification circuit, triangular wave and square wave conversion circuit, produces a square wave alternating-current output at last; Supply power to electric furnace heating wire through a power transformer conversion low-tension supply; Thereby reach the effect of heating, and this oscillatory circuit has the concussion waveform stabilization, can supply advantage such as high-power output, negative feedback collection output signal, cooperate the algorithm of single-chip microcomputer accurately to control and add thermal output; Because transformer conversion low-tension supply heats to electric furnace heating wire, effectively prevent to blow electric furnace heating wire generation fault easily because of directly adding 220VAC.In addition; Control panel and power switch are arranged on the front panel 11 of controller box 1; Wherein control panel 3 comprises and temperature viewing area (SV) 31 is set, measures temperature viewing area (PV) 32 and man-machine interaction district 33, and there are four pilot lamp in man-machine interaction district 33, is respectively OUT1, OUT2, ALM1 and ALM2; Two output indicators and two alarm lamps are used for being provided with reporting to the police and use and demonstration output situation usefulness; But also be provided with four operating keys: setting key-when set condition, preserve the new settings value of parameter, and during normal condition, switch the interface of setting value and the switching of automatic/hand state; Increase key-when set condition, be used to increase setting value can directly increase export ratio during auto state, can directly increase set-point when being shown to the definite value state, and is long by increasing (three step velocitys) fast; Minimizing key-when set condition, be used to reduce setting value can directly reduce export ratio during auto state, can directly reduce set-point when being shown to the definite value state, and is long by reducing (three step velocitys) fast; Shift key-when set condition, be used for automatically and the no disturbance switching between the manual state.In addition, the rear panel 12 of controller box 1 is provided with power supply interface 5, temperature sensor interface 6 and heating power supply output interface 7.
Single-chip microcomputer among the present invention, its control program adopts the C language, and is simple and reliable.As shown in Figure 5, software operation workflow of the present invention is following:
(1) single-chip microcomputer initialization is provided with set-point (SV value) as the case may be;
(2) initialization is promptly switched on to peripheral circuit after finishing; Sensor on the heating module is started working; The signal that collects is passed to the AD signal converter; Pass to single-chip microcomputer after the digitizing and handle, liquid crystal display measured value (PV value) simultaneously, single-chip microcomputer handling procedure section Compare () are used for comparison PV and the big or small gap of SV;
(3) as PV < during SV; Call Control () code segment,, regulate the output pulse width ratio through the rreturn value of Compare () code segment and the parameter of adjusting out certainly; Well heater carries out being the sample heating by instruction, realizes that quick, little hyperharmonic stablizes the purpose of temperature control;
(4) when PV=SV, through the rreturn value of Compare () code segment and the parameter of adjusting out certainly, adjust another output pulse width ratio, with control balance and stable export ratio purpose;
(5) as PV>during SV, call Control () code segment, through the rreturn value of Compare () code segment and the parameter of adjusting out certainly, stop output heating instruction, it is the sample heating that well heater stops.
The present invention describes through embodiment; But the present invention is not constituted restriction, with reference to description of the invention, other variations of the disclosed embodiments; Professional person as for this area expects that easily such variation should belong within the scope thereof of the present invention.
Claims (6)
1. near infrared spectrum sample heating controller; Comprise controller box (1), be arranged on the circuit appliance module in the controller box (1) and be arranged on heating tank (2), control panel (3) and the power switch (4) on controller box (1) lateral surface; It is characterized in that said circuit appliance module comprises single-chip microcomputer and the voltage amplifier, relay, impulse output circuit module, well heater, heating module and the AD signal converter that connect successively; Wherein the input end of voltage amplifier is connected with the output terminal of single-chip microcomputer; The output terminal of AD signal converter is connected with the input end of single-chip microcomputer, also is connected with LCD on the said single-chip microcomputer.
2. according to the said near infrared spectrum sample of claim 1 heating controller, it is characterized in that above-mentioned single-chip microcomputer is the mixed-signal system MCU chip of high integration, the inside of this chip is provided with the FLASH storer of a 8K+128 byte.
3. according to the said near infrared spectrum sample of claim 1 heating controller, it is characterized in that above-mentioned relay is a solid-state relay.
4. according to the said near infrared spectrum sample of claim 1 heating controller, it is characterized in that being provided with WatchDog Timer and clock oscillator in the above-mentioned controller box (1).
5. according to the said near infrared spectrum sample of claim 1 heating controller; It is characterized in that above-mentioned control panel (3) and power switch (4) are arranged on the front panel (11) of controller box (1), wherein control panel (3) comprises and temperature viewing area (31) is set, measures temperature viewing area (32) and man-machine interaction district (33).
6. according to the said near infrared spectrum sample of claim 1 heating controller, it is characterized in that the rear panel (12) of above-mentioned controller box (1) is provided with power supply interface (5), temperature sensor interface (6) and heating power supply output interface (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110260438XA CN102419281A (en) | 2011-09-05 | 2011-09-05 | NIR (near-infrared spectrum) sample heating controller |
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| CN201110260438XA CN102419281A (en) | 2011-09-05 | 2011-09-05 | NIR (near-infrared spectrum) sample heating controller |
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| CN102419281A true CN102419281A (en) | 2012-04-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721599A (en) * | 2012-05-03 | 2012-10-10 | 北京承天示优科技有限公司 | Heating device for gas sampling |
| CN102981529A (en) * | 2012-11-27 | 2013-03-20 | 中国人民解放军92941部队 | Blackbody temperature control device for testing infrared dynamic tracking characteristics |
| CN103017158A (en) * | 2012-12-28 | 2013-04-03 | 青岛安装建设股份有限公司 | Automatic control system of smoke oven |
| CN112858216A (en) * | 2021-02-05 | 2021-05-28 | 济南弗莱德科学仪器有限公司 | Rapid temperature control method for near-infrared spectrometer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199164A1 (en) * | 2003-05-09 | 2008-08-21 | Cannon Rubber Limited | Babycare Heating Apparatus |
| CN201749381U (en) * | 2010-04-01 | 2011-02-16 | 上海理工大学 | Modular cascade PID temperature controller |
| CN102109861A (en) * | 2010-12-15 | 2011-06-29 | 复旦大学 | High-frequency PWM (pulse width modulation) temperature control device and control method for thermal analyzer |
-
2011
- 2011-09-05 CN CN201110260438XA patent/CN102419281A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080199164A1 (en) * | 2003-05-09 | 2008-08-21 | Cannon Rubber Limited | Babycare Heating Apparatus |
| CN201749381U (en) * | 2010-04-01 | 2011-02-16 | 上海理工大学 | Modular cascade PID temperature controller |
| CN102109861A (en) * | 2010-12-15 | 2011-06-29 | 复旦大学 | High-frequency PWM (pulse width modulation) temperature control device and control method for thermal analyzer |
Non-Patent Citations (1)
| Title |
|---|
| 郑宏,修连宏,郑智忠: "ZDJ1PB-2型近红外光谱仪样品加热控制器的研制", 《现代科学仪器》, no. 1, 28 February 2010 (2010-02-28), pages 62 - 64 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721599A (en) * | 2012-05-03 | 2012-10-10 | 北京承天示优科技有限公司 | Heating device for gas sampling |
| CN102981529A (en) * | 2012-11-27 | 2013-03-20 | 中国人民解放军92941部队 | Blackbody temperature control device for testing infrared dynamic tracking characteristics |
| CN102981529B (en) * | 2012-11-27 | 2015-10-28 | 中国人民解放军92941部队 | For the blackbody temperature control device of infrared dynamic tracking characteristics test |
| CN103017158A (en) * | 2012-12-28 | 2013-04-03 | 青岛安装建设股份有限公司 | Automatic control system of smoke oven |
| CN112858216A (en) * | 2021-02-05 | 2021-05-28 | 济南弗莱德科学仪器有限公司 | Rapid temperature control method for near-infrared spectrometer |
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Application publication date: 20120418 |