CN106153200B - Portable blackbody calibrator - Google Patents
Portable blackbody calibrator Download PDFInfo
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- CN106153200B CN106153200B CN201610637479.9A CN201610637479A CN106153200B CN 106153200 B CN106153200 B CN 106153200B CN 201610637479 A CN201610637479 A CN 201610637479A CN 106153200 B CN106153200 B CN 106153200B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 48
- 239000013078 crystal Substances 0.000 claims description 8
- 230000005669 field effect Effects 0.000 claims description 6
- 230000036760 body temperature Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/53—Reference sources, e.g. standard lamps; Black bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/80—Calibration
Abstract
A portable blackbody calibrator. The invention relates to a portable blackbody calibrator. The control key transmits information to the control panel through four paths of general input and output interfaces, the control panel comprises a system circuit, a temperature acquisition circuit, a heating driving circuit module and a charging and discharging circuit, the system circuit and the module transmit signals in a bidirectional mode through an asynchronous serial communication bus, the system circuit transmits the signals to the heating driving circuit through one path of general input and output interfaces, the heating driving circuit transmits output signals to a heating and temperature control device, the heating and temperature control device transmits the signals to the temperature acquisition circuit and a blackbody respectively, the temperature acquisition circuit transmits the signals to the system circuit, the system circuit transmits the signals to the display screen through the asynchronous serial communication bus, and the charging and discharging circuit receives voltage signals of the lithium polymer battery. The invention is used for the blackbody calibration instrument.
Description
Technical Field
The invention relates to a portable blackbody calibrator.
Background
The electronic components are inevitably subjected to individual tiny differences after finished products are taken off line and delivered from factories and are influenced by factors such as device aging, environmental temperature change, running electromagnetic environment change and the like after running for a period of time, the precision and accuracy of the electronic components are unpredictably changed, an infrared temperature sensor element used by the train infrared shaft temperature detection device is also a sensitive device, the running safety of a vehicle is influenced after the characteristics of the infrared temperature sensor element are changed, in order to correct the change, the precision and accuracy required by regulation are achieved, a calibration instrument is used for calibrating the sensor during the regulation time, the original calibration instrument is huge in size, 220VAC is supplied with power, and when the power supply wire coil is required to be dragged for power supply calibration, 2 persons are required to be respectively positioned indoors and outdoors for matching, so that the work is very inconvenient.
Disclosure of Invention
The invention aims to provide a portable blackbody calibrator, which is used for solving the problems, reducing the size of the existing calibrated blackbody and facilitating the holding; the built-in rechargeable battery gets rid of the constraint of power cord, and the user accomplishes the temperature setting work through the button on the panel, or carries out the relevant operation of scale through wireless WIFI module control host computer, and color liquid crystal display LCD can show and predetermine temperature and real-time blackbody temperature information, also can show the relevant information of WIFI connection, and the blackbody heat source of high stability provides evenly for the scale, stable heat source output, ensures that the scale value is accurate.
The above object is achieved by the following technical scheme:
the beneficial effects are that:
1. the invention adopts a small-volume design, designs and fuses modules such as built-in lithium polymer battery power supply, color liquid crystal display, high-precision temperature control device, high-performance MCU control, WIFI wireless communication and the like, completes the top calibration work by one person, can hold the calibration and continuous time for 80 minutes by one hand, facilitates maintenance personnel to perform outdoor calibration work, shortens the outdoor operation time, reduces the number of maintenance personnel and improves the work efficiency.
2. The invention breaks the high-current and low-efficiency confinement of the heating device, adopts a novel and miniaturized thin film heater, uses a PWM driving heating circuit based on closed-loop control, reduces the working power consumption and provides a technical foundation for portable design.
3. The invention adopts the lithium polymer battery with high energy density to provide strong guarantee for the long-time endurance of equipment.
4. The friendly man-machine interface provides convenience for field operation, reduces the time for a user to adapt to equipment, ensures that the user can get on hand, and has very good affinity.
5. According to the wireless WIFI control method, the wireless control and the data exchange of the upper computer can be completed according to the information interface, the calibration work can be completed by 1 person on site, the output result is zero in waiting, and the wireless WIFI control method is visual and efficient.
6. According to the hierarchical temperature control method, the heating control algorithm at different temperatures is refined, the temperature stability and accuracy are improved, and the accuracy and reliability of the calibration result are ensured.
Description of the drawings:
fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a circuit diagram of the MCU system of the present invention.
Fig. 3 is a circuit diagram of the temperature acquisition of the present invention.
Fig. 4 is a charge-discharge circuit diagram a of the present invention.
Fig. 5 is a charge-discharge circuit diagram B of the present invention.
Fig. 6 is a charge-discharge circuit diagram C of the present invention.
Fig. 7 is a charge-discharge circuit diagram D of the present invention.
Fig. 8 is a charge-discharge circuit diagram E of the present invention.
Fig. 9 is an automatic mode workflow diagram of the present invention.
Fig. 10 is an unmanned mode workflow diagram of the present invention.
The specific embodiment is as follows:
example 1
A portable blackbody calibrator comprises the following components: control button KEYS, display screen LCD, control button KEYS pass through four way general purpose input/output interface GPIO/4 with information and transmit to control panel Ctrl, control panel Ctrl include MCU system circuit, temperature acquisition circuit TCC, heat drive circuit HDV, WIFI module and charge-discharge circuit CHR, MCU system circuit and WIFI module pass through asynchronous serial communication bus UART2 two-way transmission signal, MCU system circuit pass through general purpose input/output interface GPIO/1 all the way and transmit to heat drive circuit HDV, heat drive circuit HDV pass output PWM signal and heat and temperature control device HEATER, heat and temperature control device HEATER pass the signal respectively to temperature acquisition circuit TCC and blackbody BLB, temperature acquisition circuit TCC pass through ADC and pass signal to MCU system circuit, MCU system circuit pass through asynchronous serial communication bus UART1 and transmit to the display screen LCD, charge-discharge circuit CHR receive lithium polymer battery Li-BAT's voltage signal.
The MCU system circuit is used as the core of the invention, and the work of the scaler is globally controlled. The LCD is controlled to display through an asynchronous serial communication bus UART1, and serial port instructions are sent to control the LCD to display related controls and characters or numbers in the controls; the MCU system circuit reads the key KEYS state through the GPIO, and the key KEYS is used as a user input channel to input preset temperature; the WIFI module connection information and the like can also carry out related wireless operation on the upper computer through the calibration instrument; the MCU system circuit performs state scanning and reading in a main circulation polling mode to obtain a user control state so as to correspondingly indicate the calibration instrument. The MCU system circuit sends an instruction to the WIFI module through the asynchronous serial communication bus UART2 to set the WIFI module, the WIFI module enters a serial port transparent transmission mode after the setting is finished, and the MCU system circuit can directly send an upper computer message to interact information with an upper computer for control; the MCU system circuit reads blackbody temperature data through the ADC, and controls the heating driving circuit to drive the heating and temperature control device to finish stable heating operation through the PWM signal output by the GPIO; the charging and discharging circuit controls the lithium polymer battery to reduce voltage to supply power to the control board on one hand, and is connected with the charger through the shell interface to charge the battery on the other hand.
Example 2
The portable blackbody calibration instrument of embodiment 1, wherein the MCU system circuit comprises an ARM embedded processor, wherein one end of a diode D3 is connected in parallel with one end of a diode D4 on a pin 1 of the ARM embedded processor IC3, the other end of the diode D4 is connected in parallel with a voltage reference chip V3.3, one end of a resistor R43, one end of a capacitor C23 and a pin 64 of the ARM embedded processor IC3, and the other end of the capacitor C23 is connected in parallel with a pin 63 of the ARM embedded processor IC3 and then grounded;
the other end of the diode D3 is connected in series with one end of a capacitor C27, one end of a capacitor C26, one end of a capacitor C24, one end of a capacitor C28 and one end of a capacitor C25 after being connected in series with a direct-current battery DC, and the other end of the capacitor C24 is connected in parallel with the other end of a resistor R43 and the pin RESET end 7 of the ARM embedded processor IC 3;
the other end of the capacitor C27 is connected with the pin 4 of the ARM embedded processor IC3 and one end of the crystal resonator Y2 in parallel, and the other end of the capacitor C28 is connected with the pin 3 of the ARM embedded processor IC3 and the other end of the crystal resonator Y2 in parallel;
one end of the crystal resonator Y1 is connected in parallel with the other end of the C26, one end of the resistor R44 is connected with the No. 5 pin of the ARM embedded processor IC3, and the other end of the crystal resonator Y1 is connected in parallel with the other end of the resistor R44 and the No. 6 pin of the ARM embedded processor IC 3;
a capacitor C29 is connected in series between the No. 12 pin and the No. 13 pin of the ARM embedded processor IC 3;
the capacitor C30 is connected in series between the No. 18 pin and the No. 19 pin of the ARM embedded processor IC 3;
the capacitor C31 is connected in series between the No. 31 pin and the No. 32 pin of the ARM embedded processor IC 3;
and a capacitor C32 is connected in series between the No. 47 pin and the No. 48 pin of the ARM embedded processor IC 3.
Example 3
The portable blackbody calibrator of embodiment 1, the temperature acquisition circuit TCC includes a blackbody temperature sensor CN3, pin No. 3 of the blackbody temperature sensor CN3 is grounded, pin No. 1 of the blackbody temperature sensor CN3 is connected in parallel with one end of a resistor R15, one end of a resistor R19 and one end of a capacitor C14, the other end of the resistor R15 is connected in parallel with one end of a resistor R16, one end of a resistor R13, one end of a resistor R12 and a K pin of a voltage reference chip V3, the other end of the resistor R13 is connected in parallel with one end of a resistor R14 and an R pin of the voltage reference chip V3, the other end of the resistor R14 is connected with an a pin of the voltage reference chip V3 and a ground terminal, and the other end of the resistor R12 is connected with a voltage terminal +5v;
the black body temperature sensor CN3 is characterized IN that the No. 2 pin of the black body temperature sensor CN3 is connected with one end of a resistor R17, the other end of the resistor R17 is connected with the other end of a resistor R16 IN parallel, one end of a resistor R18 is connected with one end of a capacitor C15 IN parallel, the other end of the capacitor C15 is connected with one end of a resistor R20 IN parallel, the other end of the resistor R20 is connected with the 2IN+ pin of an operational amplifier IC1 and the other end of the resistor R19 IN parallel, the other end of the resistor R18 is connected with the 2 IN-pin of the operational amplifier IC1, the 2OUT pin of the operational amplifier IC1 is connected with one end of a resistor R22, the other end of the resistor R22 is connected with an analog-to-digital converter ADCC11 of the No. 9 pin of the ARM embedded processor IC3 IN parallel, the other end of the capacitor C17 is connected with the other end of the diode V4 IN parallel and then grounded, the operational amplifier IC1 is connected with the resistor R21 IN parallel, and the resistor R21 is connected with the capacitor C16 IN parallel.
Example 4
The portable blackbody calibration instrument according to embodiment 1, the charge-discharge circuit CHR includes a 10-pin analog-to-digital converter ADCC12 connected to an ARM embedded processor IC3, the ADCC12 is connected IN parallel with one end of a capacitor C20 and one end of a diode V5 and one end of a resistor R29, the other end of the capacitor C20 is connected IN parallel with the other end of the diode V5 and then grounded, the other end of the resistor R29 is connected IN parallel with a 2in+ pin of the operational amplifier IC2 and a 1OUT pin of the operational amplifier IC2, the 2 IN-pin of the operational amplifier IC2 is connected IN series with a resistor R28 and then is connected IN parallel with a 2OUT pin of the operational amplifier IC2 and one end of a resistor R27, the other end of the resistor R27 is connected with a 1 IN-pin of the operational amplifier IC2 and one end of a resistor R26, the other end of the resistor R26 is connected IN parallel with one end of a resistor R25 and one end of the resistor C18, the other end of the resistor C17 is connected IN parallel with a resistor R24 and then grounded, and then the other end of the resistor R24 is connected IN series with a voltage +23;
the device comprises a resistor R31 connected in parallel with a base b of a triode Q1 after a PTcharge pin 37 of an ARM embedded processor IC3 is connected in series with a resistor R30, an emitter e of the triode Q1 is grounded, a collector c of the triode Q1 is connected in parallel with one end of a diode D1 and one end of a KC coil, the other end of the diode D1 is connected in parallel with the other end of the KC coil and then connected with a resistor R32, and the resistor R32 is connected with a voltage end +24V of a lithium battery;
one charging end of the lithium battery is connected with one end of the capacitor FU 1in series, and the other end of the capacitor FU is connected with a switch and then connected with a second charging end;
the ARM embedded processor IC3 is characterized in that a No. 22 pin T3PWM1 is connected with one end of a diode in the photoelectric coupler IC4 in series with a resistor R33, one end of a resistor R34 connected with the other end of the diode in the photoelectric coupler IC4 in parallel is connected with a source electrode S of an N-channel field effect transistor Q2, the other end of the resistor R34 is connected with a grid electrode G of the N-channel field effect transistor Q2 in parallel with an emitter electrode e of a triode in the photoelectric coupler IC4, a collector electrode c of the triode in the photoelectric coupler IC4 is connected with a voltage end +15V, and a drain electrode D of the N-channel field effect transistor Q2 is connected with an OUT end of a lithium battery in series with a fuse FU 2.
Example 5
The portable blackbody calibration apparatus according to embodiment 1, wherein the ARM embedded processor IC3 is STM32.
Example 6
The portable blackbody calibration apparatus of embodiment 1, wherein the operational amplifier IC1 and the operational amplifier IC2 are each of the type TLC272.
Example 7
The portable blackbody calibration apparatus according to embodiment 1, wherein the type of the photo coupler IC4 is TLP127.
Example 8
The portable blackbody calibration apparatus according to embodiment 1, wherein the voltage reference chip V3 is model TL431.
Example 9
The operation modes of the portable blackbody calibration apparatus according to embodiment 1 include an automatic mode, a manual mode and an unmanned mode, wherein the automatic mode includes the following steps:
step S101: an automatic mode interface;
step S102: pressing a button for setting temperature at an automatic mode interface;
step S103: pressing an upper button, a lower button, a left button and a right button on a temperature setting interface to set a numerical value of 'ten hundred digits' of a preset temperature;
step S104: after the preset temperature is set, pressing a return button to save the setting and returning to the automatic mode interface;
step S105: pressing a start heating button on an automatic mode interface;
step S106: the heating and temperature control device heats the black body;
step S107: is a temperature sensor disposed on the black body sensing that the black body is equal to a preset temperature value? (the absolute difference value is within a prescribed range);
step S108: if the temperature difference is large, returning to the step S106; if the blackbody is equal to the preset temperature value, performing the next step;
step S109: if the blackbody is equal to the preset temperature value, a button for starting calibration is pressed;
step S110: scaling;
step S111: pressing a button for completing calibration;
step S112: after the calibration is finished, a calibration result is sent to an upper computer;
step S113: and sending the calibration result to the upper computer, and pressing a 'confirm' button.
Example 10
The unmanned mode of embodiment 9 comprising the steps of:
step S201: an unmanned mode interface;
step S202: pressing a start button on the unmanned mode interface;
step S203: the calibration instrument (lower computer) sends a 'start calibration message' to the detection station host (upper computer);
step S204: after sending the 'start scaling message', automatically inquiring the 'information message';
step S205: judging the information type according to the content of the information message;
step S206: returning to step S201 if the "information message" content contains stop information; if the content of the information message contains the stage information, the next step is carried out;
step S207: setting the number of stages and a preset temperature value according to the content of an information message;
step S208: after the number of stages and a preset temperature value are set, starting heating;
step S209: heating is completed;
step S210: after heating, sending a door opening instruction message;
step S211: delay 5s after sending the door opening instruction message, send the door closing instruction message (the door closing instruction message contains the blackbody temperature);
step S212: after the "door closing instruction message" is sent, the process returns to step S205.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (7)
1. A portable blackbody calibrator comprises the following components: control button KEYS, display screen LCD, characterized by: the control key KEYS transmits information to a control panel Ctrl through four general purpose input/output interfaces GPIO/4, the control panel Ctrl comprises an MCU system circuit, a temperature acquisition circuit TCC, a heating driving circuit HDV, a WIFI module and a charge-discharge circuit CHR, the MCU system circuit and the WIFI module bidirectionally transmit signals through an asynchronous serial communication bus UART2, the MCU system circuit transmits signals to the heating driving circuit HDV through one general purpose input/output interface GPIO/1, the heating driving circuit HDV transmits output PWM signals to a heating and temperature control device HEATER, the heating and temperature control device HEATER transmits signals to a temperature acquisition circuit TCC and a BLB respectively, the temperature acquisition circuit TCC transmits signals to the MCU system circuit through an ADC, the MCU system circuit transmits signals to a display screen LCD through the asynchronous serial communication bus UART1, and the charge-discharge circuit CHR receives voltage signals of a lithium polymer battery Li-BAT;
the MCU system circuit comprises an ARM embedded processor, wherein one end of a No. 1 pin of the ARM embedded processor IC3 is connected with one end of a diode D3 in parallel, the other end of the diode D4 is connected with a voltage reference chip V3.3 in parallel, one end of a resistor R43, one end of a capacitor C23 and a No. 64 pin of the ARM embedded processor IC3 in parallel, and the other end of the capacitor C23 is connected with a No. 63 pin of the ARM embedded processor IC3 in parallel and then grounded;
the other end of the diode D3 is connected in series with one end of a capacitor C27, one end of a capacitor C26, one end of a capacitor C24, one end of a capacitor C28 and one end of a capacitor C25 after being connected in series with a direct-current battery DC, and the other end of the capacitor C24 is connected in parallel with the other end of a resistor R43 and the pin RESET end 7 of the ARM embedded processor IC 3;
the other end of the capacitor C27 is connected with the pin 4 of the ARM embedded processor IC3 and one end of the crystal resonator Y2 in parallel, and the other end of the capacitor C28 is connected with the pin 3 of the ARM embedded processor IC3 and the other end of the crystal resonator Y2 in parallel;
one end of the crystal resonator Y1 is connected in parallel with the other end of the C26, one end of the resistor R44 is connected with the No. 5 pin of the ARM embedded processor IC3, and the other end of the crystal resonator Y1 is connected in parallel with the other end of the resistor R44 and the No. 6 pin of the ARM embedded processor IC 3;
a capacitor C29 is connected in series between the No. 12 pin and the No. 13 pin of the ARM embedded processor IC 3;
the capacitor C30 is connected in series between the No. 18 pin and the No. 19 pin of the ARM embedded processor IC 3;
the capacitor C31 is connected in series between the No. 31 pin and the No. 32 pin of the ARM embedded processor IC 3;
and a capacitor C32 is connected in series between the No. 47 pin and the No. 48 pin of the ARM embedded processor IC 3.
2. The portable blackbody calibrator of claim 1, wherein: the temperature acquisition circuit TCC comprises a blackbody temperature sensor CN3, a pin 3 of the blackbody temperature sensor CN3 is grounded, a pin 1 of the blackbody temperature sensor CN3 is connected with one end of a resistor R15 in parallel, one end of a resistor R19 and one end of a capacitor C14 in parallel, the other end of the resistor R15 is connected with one end of a resistor R16 in parallel, one end of a resistor R13, one end of a resistor R12 and a K pin of a voltage reference chip V3 in parallel, the other end of the resistor R13 is connected with one end of the resistor R14 and the R pin of the voltage reference chip V3 in parallel, the other end of the resistor R14 is connected with an A pin of the voltage reference chip V3 and the ground, and the other end of the resistor R12 is connected with a voltage end +5V;
the No. 2 pin of the black body temperature sensor CN3 is connected with one end of a resistor R17, the other end of the resistor R17 is connected with the other end of a resistor R16 IN parallel, one end of a resistor R18 is connected with one end of a capacitor C15 IN parallel, the other end of the capacitor C15 is connected with one end of a resistor R20 IN parallel, the other end of the resistor R20 is connected with the 2IN+ pin of the operational amplifier IC1 and the other end of the resistor R19 IN parallel, the other end of the resistor R18 is connected with the 2 IN-pin of the operational amplifier IC1, the 2OUT pin of the operational amplifier IC1 is connected with one end of a resistor R22, the other end of the resistor R22 is connected with an end of a capacitor C17 IN parallel, one end of a diode V4 is connected with an ARM embedded type processor IC3 pin 9 analog-to-digital converter ADC11, the other end of the capacitor C17 is connected with the other end of the diode V4 IN parallel and then grounded, the operational amplifier IC1 is connected with the resistor R21 IN parallel, and the resistor R21 is connected with the capacitor C16 IN parallel.
3. The portable blackbody calibrator of claim 2, wherein: the charge-discharge circuit CHR comprises a 10-pin analog-to-digital converter ADC12 connected with an ARM embedded processor IC3, wherein one end of a capacitor C20, one end of a diode V5 and one end of a resistor R29 are connected IN parallel to the analog-to-digital converter ADC12, the other end of the capacitor C20 is connected with the other end of the diode V5 IN parallel and then grounded, the other end of the resistor R29 is connected with a 2IN+ pin of an operational amplifier IC 2IN parallel to a 1OUT pin of the operational amplifier IC2, the 2 IN-pin of the operational amplifier IC2 is connected with one end of a resistor R28 IN series and then connected with the 2OUT pin of the operational amplifier IC 2IN parallel, the other end of the resistor R27 is connected with the 1 IN-pin of the operational amplifier IC2, the other end of the resistor R26 is connected with one end of the resistor R25 IN parallel, one end of the resistor R24 is connected with one end of the capacitor C18 IN parallel, the other end of the resistor C17 is connected with the other end of the resistor R25 IN parallel and then grounded, and the other end of the resistor R24 is connected with the voltage IN series and then connected with the voltage of the resistor R24;
the device comprises a resistor R31 connected in parallel with a base b of a triode Q1 after a PTcharge serial resistor R30 of a No. 37 pin of an ARM embedded processor IC3, wherein an emitter e of the triode Q1 is grounded, a collector c of the triode Q1 is connected with one end of a diode D1 in parallel with one end of a KC coil, the other end of the diode D1 is connected with the other end of the KC coil in parallel and then connected with a resistor R32, and the resistor R32 is connected with a voltage end +24V of a lithium polymer battery;
one charging end of the lithium polymer battery is connected with one end of the capacitor FU 1in series, and the other end of the capacitor FU1 is connected with the second charging end after being connected with the switch;
the ARM embedded processor IC3 is characterized in that a No. 22 pin T3PWM1 is connected with one end of a diode in the photoelectric coupler IC4 in series with a resistor R33, one end of a resistor R34 connected with the other end of the diode in the photoelectric coupler IC4 in parallel is connected with a source S of an N-channel field effect transistor Q2, the other end of the resistor R34 is connected with a grid G of the N-channel field effect transistor Q2 in parallel with an emitter e of a triode in the photoelectric coupler IC4, a collector c of the triode in the photoelectric coupler IC4 is connected with a voltage end +15V, and a drain D of the N-channel field effect transistor Q2 is connected with an OUT end of a lithium polymer battery in series with a fuse FU 2.
4. The portable blackbody calibrator of claim 1, wherein: the model of the ARM embedded processor IC3 is STM32.
5. A portable blackbody calibration as claimed in claim 2 or 3, wherein: the model numbers of the operational amplifier IC1 and the operational amplifier IC2 are TLC272.
6. A portable blackbody calibration as claimed in claim 3, wherein: the model of the photo-coupler IC4 is TLP127.
7. The portable blackbody calibrator of claim 1, wherein: the voltage reference chip V3.3 is model TL431.
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| CN201610637479.9A CN106153200B (en) | 2016-08-05 | 2016-08-05 | Portable blackbody calibrator |
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