CN205808564U - Infrared detector module multi way temperature based on diode thermometric monitoring system - Google Patents
Infrared detector module multi way temperature based on diode thermometric monitoring system Download PDFInfo
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- CN205808564U CN205808564U CN201620319376.3U CN201620319376U CN205808564U CN 205808564 U CN205808564 U CN 205808564U CN 201620319376 U CN201620319376 U CN 201620319376U CN 205808564 U CN205808564 U CN 205808564U
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Abstract
This patent discloses a kind of infrared detector module multi way temperature based on diode thermometric monitoring system.This utility model includes that main control module, power supply voltage stabilizing conditioning module, temperature collect module, Signal-regulated kinase, LCD MODULE, data readback and key-press module time calibration and USB turn serial port module.Being processed by particular design, it is achieved that the continuously adjustabe to thermometric diode bias current, multi way temperature is monitored the most in real time, display in real time, automatically record storage and intelligent alarm.This patent have simple to operate, low cost, portability are strong, temperature measurement accuracy is high.This utility model is equally applicable to other temperature monitoring occasion using diode thermometric.
Description
Technical field
This patent relates to infrared detector module application technology, refers specifically to a kind of Infrared Detectors based on diode thermometric
Assembly multi way temperature monitoring system, it is applicable to the application of refrigeration type infrared detector assembly, present disclosure applies equally to other and adopt
By the temperature monitoring occasion of diode thermometric.
Background technology
Infrared detector module has a wide range of applications at space flight and aviation infrared regime.Along with wavelength to long wave extension and is visited
Surveying the raising of sensitivity, Infrared Detectors could must work under profound hypothermia.When detector is operated in low temperature environment, it is with outer
Many employing vacuum insulation isolation between portion's equipment.Realized detector and external equipment through vacuum interlayer by Electricity Federation wire
Electronic communication.In order to reduce the heat power consumption of infrared detector module, these detectors outreach the wire of electronic communication and typically use
The material that thermal resistance is bigger, so causes detector to outreach the conductor resistance of electronic communication bigger than normal, in order to improve thermometric
Precision, general many employing diodes are as temperature element.
In infrared detector module is applied, need detector operating temperature is detected.Sometimes for multiple red
Multiple thermometric diodes of external detector assembly or an infrared detector module carry out monitoring the most in real time.Traditional side
Method is to use constant-current source to provide a specific bias current to thermometric diode, then gathers the voltage at diode two ends, according to
The temperature known and voltage curve, know temperature by the way of tabling look-up.This is obviously not suitable for long-time multi way temperature real time record
Monitoring.It addition, the bias current of thermometric diode is many at 25 μ A-1mA in refrigeration type infrared detector assembly.According to inhomogeneity
The constant-current source that the diode arrangement of type is different, in order to adapt to the long-time real time temperature monitoring of all types of infrared detector modules
Record, need explore a kind of new method to solve this problem.
Summary of the invention
The purpose of this patent is to provide a kind of infrared detector module multi way temperature based on diode thermometric monitoring system,
Implement function such as: 1) continuously adjustabe to thermometric diode bias current 25 μ A-1mA；2) multiple point for measuring temperature temperature are real for a long time
Time monitoring record；3) according to the corresponding relation of diode-built-in temperature and voltage at the real-time displays temperature of system display interface；4)
System has storage function；5) data exchange is carried out by USB interface and outer attached device；6) based on the most portable and reduce to survey
The interference of temperature precision, uses battery to power and USB powers dual power supply.
This patent is that a kind of infrared detector module multi way temperature based on diode thermometric monitors system, including following several
Individual module: main control module, power supply voltage stabilizing conditioning module, temperature collect module, Signal-regulated kinase, LCD MODULE, number
Serial port module is turned according to playback and key-press module time calibration and USB.
Main control module uses STMicw Electronics STM32 based on the microcontroller that Cortex-M3 is core series, and this is
Row have abundant memorizer and various Peripheral Interface resource, it is possible to well meet the requirement of temperature monitoring system.
Power supply voltage stabilizing conditioning module uses dual power supply pattern, i.e. external power supply pattern and battery powered mode root
The working condition on border switches over factually.Need to obtain burning voltage for improving certainty of measurement, use voltage stabilizing chip to carry out surely
Pressure output.Stable system working output voltage is obtained with voltage stabilizing chip again after cell voltage is used boost chip boosting.
Temperature collect module is diode temperature sensor measuring circuit, diode in infrared detector module for temperature
The sensitivity of degree is the highest, keeps good linear relationship within the scope of the biggest temperature.It is typically forward bias, imposes constant electricity
Stream, when the temperature is changed, its forward junction voltage V changes therewith, and V and temperature T meet specific function relational expression.
The data come by sensor acquisition in Signal-regulated kinase are usually small-signal, are less able to directly meet AD and turn
Change the needs of input voltage.The meeting that the input range of AD is insufficient makes certainty of measurement substantially reduce.Use amplifier chip to faint
Signal is implemented amplitude and is converted the enlarging function moved with level to meet the demand of AD input voltage.
LCD MODULE is liquid crystal display, and what this patent was selected is a kind of graphic dot matrix liquid crystal display.It mainly by
Line driver/row driver and 128 × 64 full lattice lcd display composition.The display of figure and Chinese character can be completed, constitute
Good man-machine interaction graphical interfaces.
Data readback and key-press module time calibration are that button is circulated scanning, when being found to have button and pressing, then
Enter corresponding keys interrupt service routine, data readback and time calibration are operated.
USB serial ports delivery module is essential in Practical Project, and this module employs USB and turns serial port chip, by temperature
Data are sent to host computer by serial ports.
The implementation method of the present invention is as follows:
Step one: each module initialization of system electrification；
Step 2: temperature collect module gathers ambient temperature corresponding voltage value, and changes through signal condition and A/D
After by digital data transmission to main control module carry out voltage turn temperature data process；
Step 3: main control module calculating obtains temperature data after processing and stores, and temperature data is sent feeding simultaneously
Brilliant display module Dynamic Announce；
Step 4: main control module is circulated scanning to button, when being found to have button and pressing, then enters and presses accordingly
Key interrupt service routine, operates data readback and time calibration.
Step 5: carried out temperature data by main control module order LCD MODULE and show, and turn serial ports general by USB
Temperature data is sent to host computer display monitoring.
The advantage of this patent:
(1) simple to operate, intelligent monitoring, with low cost；
(2) multi pass acquisition temperature, the bias current of each road is adjustable, compatible high, applied widely；
(3) having battery and the double mode power supply of USB serial ports, portability is strong；
(4) using low-voltage power supply, have voltage stabilizing function, temperature measurement accuracy is high；
(5) have that temperature is overproof and power supply electricity shortage auto-alarm function.
Accompanying drawing explanation
Fig. 1 infrared detector module based on diode thermometric multi way temperature Fundamentals of Supervisory Systems block diagram；
Fig. 2 main control module circuit；
Fig. 3 power supply voltage stabilizing conditioning module circuit；
Fig. 4 temperature data acquisition modular circuit；
Fig. 5 data conditioning signaling module；
Fig. 6 LCD MODULE circuit；
Fig. 7 data readback/time calibration key-press module circuit；
Fig. 8 USB serial ports delivery module circuit；
Fig. 9 multi way temperature monitoring process flow diagram flow chart.
Detailed description of the invention
Below in conjunction with the accompanying drawings specific implementation of the patent mode is described in further detail:
As it is shown in figure 1, the infrared detector module multi way temperature monitoring system of diode thermometric mainly includes ARM
STM32F101 main control module, thermometric diode temperature sensor module, Signal-regulated kinase, power supply voltage stabilizing adaptation module, liquid
Brilliant display module, data readback/time calibration key-press module, USB turn serial communication modular.Multichannel silicon thermometric diode temperature passes
Sensor is connected with Signal-regulated kinase, by sensor acquisition to voltage data deliver to Signal-regulated kinase and be amplified nursing one's health
To corresponding voltage signal.Signal-regulated kinase is connected with main control module, and conditioned voltage signal is sent to master control
12 bit comparators that molding block carries carry out A/D conversion, and it is digital signal that voltage signal carries out analog digital conversion.After conversion
Voltage data carries out computing according to the relational expression of silicon diode voltage Yu temperature at main control module, draws digital temperature now
Numerical value.Again digital temperature data are stored in FLASH, and main control module is connected with LCD MODULE.By
Main control module order LCD MODULE carries out the multichannel roll display of real-time digital temperature.Data readback and time calibration press
Key module is connected with main control module, and key-press module is monitored by main control module in real time, when there being button to press, and master control
Data readback button is pressed by molding block or button time calibration is pressed and judged.And the instruction sent according to button is carried out
Data readback and the realization of function time calibration.USB turns serial communication modular and is connected with main control module, except data being existed
Outside showing on liquid crystal display, it is also possible to data were entered USB serial port module and is sent to host computer and carries out showing and supervising
Control.
As in figure 2 it is shown, the main control module that main control module circuit is used is ARM STM32F101.STMicw Electronics
Company releases processor STM32 based on ARM, and it is with ARM Cortex-M3 as kernel, and this core center efficiency is high, programming letter
Single, there is outstanding determination and interrupt behavior.The main feature of STM32F103 processor is as follows: 1) low-power consumption: use 3.3V voltage
Power supply, embedded RTC clock, support that low-power consumption mode runs.2) data-handling capacity is strong: maximum operation frequency 72MHZ, inside has list
Cycle hardware multiplier and divider.3) memory space is big: there is the FLASH of SRAM, 256KB of 64KB inside, supports outside expansion
Exhibition.4) peripheral hardware aboundresources: have 2 IIC interfaces, 5 UART interface, 3 SPI interface, also USB, CAN interface and 80
GPIO resource.Fully meet clock, house dog, the extension of button remote alarm interface.Compared with 8 single-chip microcomputers, combine high-performance,
Keep high integration while low-power consumption and characteristic of low voltage and develop characteristic easily.
As it is shown on figure 3, power supply voltage stabilizing conditioning module uses dual power supply pattern, i.e. provide external power supply and power
Pattern and battery powered mode, can switch over according to actual working condition.Power supply is powered and is easily subject between element
Interference makes output voltage fluctuate up and down near output valve, bigger on follow-up processing of circuit precision impact.For making electricity
Pressure is maintained at stable state, have employed MAX14523AATA+ chip to carry out voltage stabilizing output at power supply module.
MAX14523AATA+ is a analog signal conditioner chip of MAXIM company, is the core with programmable current limiting switch feature
Sheet, conducting resistance is 70m Ω, and input voltage range is 1.7V-5.5V, and current limliting is adjustable in the range of 250mA-1.5A, can obtain
Output valve that must be stable.No. 5 pin IN are the voltage input end of chip, and No. 7 pin ON are the enable port of chip, when input is
During high voltage so that chip runs well, and No. 4 pins are output port of power source, are preferably exported stable voltage.No. 3
Pin is overcurrent actuator, is used for regulating the numerical value of output port.By the 5V power supply that provided by USB by MAX14523AATA
+ No. 5 pin IN input, No. 7 Enable Pins ON connect high level makes chip start, holds SETI at the indirect 300k with ground for No. 3
Protective resistance, be used for regulate port output.5V magnitude of voltage after No. 4 port OUT outputs are stable.Conventional battery powered voltage
Numerical value is less, needs first it to be carried out boosting process.TLV61220 for be a aim at battery-powered products provide power supply solve
The chip of scheme.By a non-essential resistance potentiometer, output voltage can be set.It is a 6 ultra-thin SOT-23 of pin
Encapsulation.No. 1 pin SW selects switch for boosting or current limliting, and No. 2 pin GND are grounding ports, and No. 3 pin EN are enable port, and 4
Number pin FB is the feedback pin of output voltage numerical value, and No. 5 pins are output voltage pin, and No. 6 pins are for treating that booster power is defeated
Enter pin.Use TLV61220 boost converter will to be risen a height of 5V by the 3.7V voltage of lithium battery power supply, then 5V voltage is inputted
MAX14523AATA+ obtains the 5V voltage source of stable power-supplying.
As shown in Figure 4, temperature data acquisition modular circuit uses thermometric diode and carries out data acquisition, diode
Temperature control is high, it is common that every number of degrees millivolt, and the linearity is good, can keep the most linear and close within the scope of the biggest temperature
System.When thermometric, it is common that forward bias, impose constant current I0, operating point is in voltage saturation district, at this moment due to electric current not
The measurement error stablized and bring is less, when the temperature varies, and its forward junction voltage VFChange therewith, VFIt it is temperature
Function,This adds junction voltage expression formula during forward bias current for diode.When thermometric, will survey
The operating current of diode temperature is fixed, and I is that constant, i.e. diode are in constant-current source state.The now forward junction voltage of diode
Only there is relation with temperature, here it is the principle of diode thermometric.Diode voltage signal in infrared detector module is entered
Row gathers, so that it may calculate corresponding temperature.
As it is shown in figure 5, the signal that data conditioning signaling module circuit is mainly used in collecting is nursed one's health, common
The output of sensor is less able to directly meet the needs of ADC input voltage.If the input range of ADC can not be sufficiently sharp
With, certainty of measurement will be lost.This circuit, to using amplifier to move signal enforcement amplitude conversion with level, can meet ADC defeated
Enter the demand of voltage.Conditioning module have selected 4 amplifier combined chip TLV2474c of TI company.This chip uses CMOS structure,
Full amplitude of oscillation input and output.The TLV2474c amplifier composition current source being wherein connected with diode provides stable to diode
Bias current, TL431 as the reference voltage, is consistent with the estimation of side circuit parameter according to the selection of circuit structure form.
As shown in Figure 6, LCD MODULE circuit is LCD MODULE.What the present invention selected is 12864B liquid crystal display
Device, 12864 is a kind of graphic dot matrix liquid crystal display, and it is mainly by the full dot matrix liquid of line driver and row driver and 128 × 64
Crystal display forms.Figure can be completed show, it is also possible to show 8 × 4 (16 × 16 dot matrix) Chinese characters.Its display resolution is
128 × 64, utilize this module interface mode flexibly and operational order simply and easily, may make up full Chinese man-machine interaction figure
Shape interface also can complete figure and show. and Low-voltage Low-power is its another distinguishing feature.
As it is shown in fig. 7, data readback/time calibration key-press module circuit, contain two functions.After program is run, main
Key part is monitored by control module in real time.When monitoring main menu button SW3 at the appointed time by time next time, enter
Enter data readback function.SW5 represents and turns in data, and SW6 represents and looks under data；When monitoring main menu button SW3 in regulation
In when pressing twice, entry time calibration key-press module circuit, then button SW4 is monitored, press when at the appointed time
When lower number of times is one time, enter timing pattern, then subtract when realizing respectively with SW5 and SW6 with time add function.It is two when pressing number of times
Time secondary, enter and adjust merotype, then realize respectively with SW5 and SW6 point subtracting and dividing adding function.When pressing number of times and being three times, enter
Adjust second pattern, then realize the second with SW5 and SW6 respectively and subtract and add function with the second.
It is illustrated in figure 8 USB serial ports delivery module circuit.Along with computer technology development serial ports and parallel port slowly at PC
Upper fewer and feweri.In Practical Project, serial ports is essential, and the general USB of employing turns serial port chip and carrys out a virtual serial ports.This electricity
Road employs the FT232RL USB of USB2.0 and turns serial port chip, and FT232 chip is that a outstanding USB of FTDI company turns
USART chip, in that context it may be convenient to usb signal is conveniently converted into RS-232, RS422, RS485 signal/RS-232, RS422,
RS485 signal is converted into usb signal.FT232R is internal mainly to be drawn by USB transceiver, SIE (SIE), usb protocol
Hold up, first in first out (FIFO) controller, Baud rate generator, clock multiplier/driver, 3.3V Voltage stabilizing module, internal 12MHz
Agitator and the part composition such as UART Universal Asynchronous Receiver Transmitter (UART) controller.For with RS232 interface section, UART mainly uses
Complete RS232 interface serial and concurrent between data conversion.FT232R provides complete signal so that it is have general
Property, it is also possible to change with other communication mode in addition to RS232.Two twoport fifo buffers within FT232R,
One is the transmission buffer of 128 bytes, and another is the reception buffer of 256 bytes.They be used to usb data and
The exchange buffering of RS232 data, UART FIFO Controller may be used for processing the two buffer and receives and dispatches with UART
Data transmission between depositor.USB power source band overcurrent protection, use 500MA resettable fuse, be internally integrated crystal oscillator and
Build-out resistor, performance is more stable.
It is illustrated in figure 9 multi way temperature monitoring process flow diagram flow chart.System start-up operational mode after powering on, temperature collect module
To initialize etc. each equipment.Temperature detecting module will carry out diode voltage data acquisition, the analog voltage data that will collect
Send in main control module single-chip microcomputer and carry out analog digital conversion, and carry out temperature conversion and storage according to the relation of voltage Yu temperature.
The digital temperature obtained is sent to liquid crystal display go to show, and utilizes USB to turn Serial Port Line to be sent out by temperature data simultaneously
Deliver to host computer be monitored.Program is circulated scanning to button, when being found to have button and pressing, then enters corresponding button
Service routine, and it is processed.The button program of this patent mainly completes menu function, checks storage data
And the amendment to the time.
Claims (6)
1. infrared detector module multi way temperature based on a diode thermometric monitoring system, including main control module, power supply
Voltage stabilizing conditioning module, temperature collect module, Signal-regulated kinase, LCD MODULE, data readback and button mould time calibration
Block and USB turn serial port module, it is characterized by:
In described multi way temperature monitoring system, multi-route measuring temperature diode is connected with Signal-regulated kinase, the diode that will collect
Voltage signal is amplified obtaining corresponding conditioned signal；Signal-regulated kinase is connected with main control module, by conditioned
Voltage signal is sent to 12 bit comparators that main control module carries and carries out A/D conversion, and voltage signal is converted to digital signal；
Carry out being calculated corresponding number with temperature funtion relation according to voltage in main control module by the voltage data changed
Word Temperature numerical；And Temperature numerical is stored in FLASH；Main control module is connected with LCD MODULE, by leading
Control module order LCD MODULE carries out real time temperature and shows；USB turns serial port module and is connected with main control module, permissible
By USB serial port module, data are sent to host computer carry out showing and monitoring.
A kind of infrared detector module multi way temperature based on diode thermometric the most according to claim 1 monitoring system,
It is characterized in that: described main control module uses STMicw Electronics STM32 based on the microcontroller that Cortex-M3 is core
Series.
A kind of infrared detector module multi way temperature based on diode thermometric the most according to claim 1 monitoring system,
It is characterized in that: described power supply voltage stabilizing conditioning module uses dual power supply pattern, i.e. electric source modes and battery mould of powering to enter
Row switching, uses voltage stabilizing chip to carry out voltage stabilizing running voltage output.
A kind of infrared detector module multi way temperature based on diode thermometric the most according to claim 1 monitoring system,
It is characterized in that: described temperature collect module is diode temperature sensor measuring circuit.
A kind of infrared detector module multi way temperature based on diode thermometric the most according to claim 1 monitoring system,
It is characterized in that: described Signal-regulated kinase uses amplifier chip that small-signal is implemented amplitude conversion and putting that level moves
Big function is to meet the demand of AD input voltage.
A kind of infrared detector module multi way temperature based on diode thermometric the most according to claim 1 monitoring system,
It is characterized in that: described LCD MODULE uses graphic dot matrix liquid crystal display.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784126A (en) * | 2016-04-15 | 2016-07-20 | 中国科学院上海技术物理研究所 | Infrared detector assembly multi-channel temperature monitoring system based on diode temperature measurement |
| CN107065962A (en) * | 2017-03-30 | 2017-08-18 | 成都优创复材科技有限公司 | A kind of storage facilities temperature control system of microencapsulation material |
-
2016
- 2016-04-15 CN CN201620319376.3U patent/CN205808564U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784126A (en) * | 2016-04-15 | 2016-07-20 | 中国科学院上海技术物理研究所 | Infrared detector assembly multi-channel temperature monitoring system based on diode temperature measurement |
| CN107065962A (en) * | 2017-03-30 | 2017-08-18 | 成都优创复材科技有限公司 | A kind of storage facilities temperature control system of microencapsulation material |
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