CN103954388A - Low-power-consumption portable optical stress monitoring device - Google Patents
Low-power-consumption portable optical stress monitoring device Download PDFInfo
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- CN103954388A CN103954388A CN201410210829.4A CN201410210829A CN103954388A CN 103954388 A CN103954388 A CN 103954388A CN 201410210829 A CN201410210829 A CN 201410210829A CN 103954388 A CN103954388 A CN 103954388A
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Abstract
Provided is a low-power-consumption portable optical stress monitoring device. The low-power-consumption portable optical stress monitoring device comprises a casing (3), wherein a linear power supply circuit (5) is installed in the casing and respectively connected with a control circuit (6), an embedded host machine (4) and a fiber bragg grating adjusting instrument (2), the fiber bragg grating adjusting instrument is connected with a group of fiber bragg grating sensors (1), the control circuit is connected with the embedded host machine, the embedded host machine is connected with the fiber bragg grating adjusting instrument, the control circuit is provided with the linear power supply circuit, the linear power supply circuit is respectively connected with a relay circuit (7), a drive circuit (8), a level switching circuit (9), a core chip circuit (10) and an RS23 level switching circuit (11), the core chip circuit is provided with a temperature sensor (12) and connected with the level switching circuit, the level switching circuit is connected with the drive circuit, and the drive circuit is connected with the relay circuit. The low-power-consumption portable optical stress monitoring device is used for optical stress detection.
Description
technical field:
the present invention relates to a kind of Low Power Consumption Portable optical stresses monitoring equipment.
background technology:
in Aeronautics and Astronautics, nuclear engineering, chemical industry and power engineering, a lot of machinery, equipment are worked under high temperature or low temperature at present, except solving the high low temperature strength problem of material itself, also in the urgent need to carrying out the stress measurement under heat (cold) state operating mode of model or material, particularly in high temperature or rugged surroundings, can obtain the situation of change of testee surface or internal stress, by the common analytical calculation of multiple positions STRESS VARIATION value, measure the STRESS VARIATION situation of object entirety.But stress checkout equipment had following some shortcoming in the past: one, and traditional stress checkout equipment power consumption is high, needs debugging, the MCU Instruction inefficiency adopting after powering on; Its two, traditional stress checkout equipment is subject to medium and low frequency undesired signal has reduced the accuracy of measurement data, the electron device of employing can not overcome the working environment of low temperature and high temperature;
its three, traditional stress checkout equipment is merely able to solve the problem of STRESS VARIATION value and temperature value.
summary of the invention:
the object of this invention is to provide a kind of Low Power Consumption Portable optical stresses monitoring equipment.
above-mentioned object realizes by following technical scheme:
a kind of Low Power Consumption Portable optical stresses monitoring equipment, its composition comprises: shell, linear power supply circuit is installed in described shell, described linear power supply circuit respectively with control circuit, embedded host, fiber grating adjusting apparatus connects, described fiber grating adjusting apparatus is connected with one group of light grating sensor, described control circuit is connected with embedded host, described embedded host is connected with fiber grating adjusting apparatus, described control circuit has linear power supply circuit, described linear power supply circuit respectively with relay circuit, driving circuit, level shifting circuit, acp chip circuit, RS232 level shifting circuit connects, described acp chip circuit is provided with temperature sensor, described acp chip circuit is connected with described level shifting circuit, described level shifting circuit is connected with described driving circuit, described driving circuit is connected with described relay circuit.
described Low Power Consumption Portable optical stresses monitoring equipment, the 3.3v power output end of described linear power supply circuit and described acp chip circuit R6 resistance, the NRST pin of STM32F103RET6 microcontroller connects, the NRST pin of capacitor C 2 and STM32F103RET6 microcontroller, earth terminal GND connects, resistance R 16 respectively with earth terminal GND, STM32F103RET6 microcontroller BOOT0 pin connects, resistance R 17 and earth terminal GND, STM32F103RET6 microcontroller BOOT1 pin connects, pin of crystal oscillator X1 and capacitor C 1, resistance R 1, STM32F103RET6 microcontroller OSC_IN/PD0 pin connects, described another pin of crystal oscillator X1 and capacitor C 5, resistance R 1, STM32F103RET6 microcontroller OSC_OUT/PD1 pin connects, pin of crystal oscillator X2 is connected with STM32F103RET6 microcontroller PC14-OSC32_IN pin, the described crystal oscillator X2 other end is connected with STM32F103RET6 microcontroller PC15-OSC32_OUT pin, No. 1 pin of boundary scan integrated circuit J13 is connected with earth terminal GDN, No. 2 pins of described boundary scan integrated circuit J13 are connected with STM32F103RET6 microcontroller SWCLK pin by pull-up resistor R9, No. 3 pins of described scan IC J13 are connected with STM32F103RET6 microcontroller SWDIO pin by pull-up resistor R12, No. 4 pins of described boundary scan integrated circuit J13 are connected with the 3.3v power output end of linear power supply circuit by 0 Europe resistance R 8.
described Low Power Consumption Portable optical stresses monitoring equipment, described linear power supply circuit has 5v voltage input end and 3.3v power output end, described 3.3v power output end is connected with shunt capacitance C31 and capacitor C 33, described shunt capacitance C31 is connected with earth terminal GND with described capacitor C 33, described 5V voltage output end is connected with shunt capacitance C24 and capacitor C 27, capacitor C 27 is connected with linear voltage regulator REG1117-3.3, and described linear voltage regulator REG1117-3.3 is connected with shunt capacitance C31.
described Low Power Consumption Portable optical stresses monitoring equipment, described level shifting circuit has highly integrated level shifting circuit, the integrated level shifting circuit VCCA of described height pin is connected with capacitor C 22, described capacitor C 22 is connected with+5V power supply, VCCB pin and the VC of capacitor C 29 and highly integrated level shifting circuit
cBpin connects.
described Low Power Consumption Portable optical stresses monitoring equipment, described driving circuit has one group of ULN2003 chip, the OUT1 pin of described ULN2003 chip is connected with JQX-113M relay U3, the OUT2 pin of described ULN2003 chip is connected with JQX-113M relay U4, and the OUT3 pin of described ULN2003 chip is connected with JQX-113M relay U9.
described Low Power Consumption Portable optical stresses monitoring equipment, described STM32F103RET6 microcontroller PD2 pin is connected with the DQ pin of temperature inductor DS18b20, the VDD pin of described temperature inductor DS18b20 is connected with resistance R 14 with+3V power supply, and described resistance R 14 is connected with DQ pin.
described Low Power Consumption Portable optical stresses monitoring equipment, described RS232 level shifting circuit has transceiver SP3232EEN, described transceiver SP3232EEN is connected with RS232 1 interface, RS232 2 interfaces respectively, the C1+ pin of described transceiver SP3232EEN is connected by capacitor C 3 with C1-pin, and the C2+ pin of described transceiver SP3232EEN is connected by capacitor C 4 with C2-pin.
beneficial effect of the present invention:
1, acp chip circuit of the present invention adopts STM32F103RET6 microprocessor, adopt Cortex-M3 kernel, current state-of-the-art high-performance, low-power consumption microprocessor, instruction efficiency is 1.25DMips/MHz, and common MCU Instruction efficiency 0.1DMips/MHz, performance exceeds tens times, when STM32 work 72MHz, consumes 36mA (all peripheral hardwares are in running order), and power consumption is very low; The resistance R 6 adopting and capacitor C 2 form the reset circuit of microcontroller STM32, and this circuit can ensure that microcontroller STM32 powered on moment keeps correct state; A pin of the crystal oscillator X1 adopting connects the OSC_IN/PD0 pin of capacitor C 1, resistance R 1, U2, the another one pin of crystal oscillator X1 connects the OSC_OUT/PD1 pin of capacitor C 5, resistance R 1, STM32F103RET6 microcontroller, form host crystal oscillatory circuit, for microcontroller work provides indispensable high-speed clock source; The crystal oscillator X2 one end adopting connects the PC14-OSC32_IN pin of STM32F103RET6 microcontroller, the PC15-OSC32_OUT pin that the other end connects STM32F103RET6 microcontroller, forms the low-speed clock source of microcontroller; The boundary scan integrated circuit J13 adopting and resistance R 8, resistance R 9, resistance R 12 form emulation, the download interface of microcontroller, can debug the code of microcontroller by this interface.
2, the input voltage 5V of linear power supply circuit of the present invention and output voltage 3.3V, input voltage and input voltage pressure reduction are little, and self-heating amount is little, and shunt capacitance C31 and C33 be filtering circuit medium and low frequency undesired signal effectively; The integrated level shifting circuit of described height has the 8 two-way IO in tunnel, and every road maximum provides the driving force of 24mA, and working temperature is-40 DEG C ~ 85 DEG C; ULN2003 chip is that the high integration being made up of Darlington transistor drives chip, and inner integrated fly-wheel diode, has 7 passages, and each passage maximum can provide the Absorption Current ability of 500mA, and working temperature is-40 DEG C ~ 85 DEG C; SP3232 chip has the advantages such as good stability, market maintenance be large; All electric elements working temperatures are in sum-40 DEG C ~ 85 DEG C and can overcome the working environment of low temperature and high temperature.
3, the light grating sensor that the present invention adopts has anti-electromagnetic interference (EMI), good endurance, quasi-distributed sensing, absolute measurement, size is little, highly sensitive, precision is high, bandwidth, signal to noise ratio (S/N ratio) advantages of higher, direct or indirect (by certain encapsulation or dexterous device) monitoring strain, temperature, crack, displacement, vibration, burn into stress and so on physical quantities, has solved solution STRESS VARIATION value that sensor in the past can only be single and the problem of temperature value.
4, the fiber Bragg grating (FBG) demodulator that the present invention adopts have 4 road optical channels, each optical channel can connect at most 25 fiber-optic grating sensors, sweep velocity be 100S/s, optical channel fan-out capability be-3dBm, data-interface adopt Ethernet (TCP/IP) interface of standard, work power consumption 20W, IP65 degree of protection, this equipment volume is small and exquisite, power consumption is moderate, has extraordinary protective capacities.
5, it is main flow that the embedded host that the present invention adopts adopts embedded main board, the Embedded PC/104 of low-power consumption, based on the CPU(1.8G double-core of Intel Atom D525), plate carries 2GB DDR3 800MHz SDRAM, 1 VGA interface, 1 single channel LVDS interface, 2 10/100/1000 BaseT network interfaces, the hard-disk interface of 1 SATA 3GB/s, 4 USB2.0 interfaces, 6 road serial ports, 8 road GPIO interfaces, power consumption is 15W, volume 90 × 98mm, working temperature is-40 DEG C ~ 85 DEG C, there is integrated level high, speed is fast, volume is little, low in energy consumption, be applicable to very much the environment of portable and a large amount of computings of needs.
brief description of the drawings:
accompanying drawing 1 is structural representation of the present invention.
accompanying drawing 2 is control circuit structured flowcharts.
accompanying drawing 3 is acp chip circuit diagrams.
accompanying drawing 4 is linear power supply circuit diagrams.
accompanying drawing 5 is level shifting circuit figure.
accompanying drawing 6 is driving circuit figure.
accompanying drawing 7 is structural representations of JQX-113M relay U3.
accompanying drawing 8 is structural representations of JQX-113M relay U4.
accompanying drawing 9 is structural representations of JQX-113M relay U9.
accompanying drawing 10 is temperature sensor circuit figure.
accompanying drawing 11 is RS232 level shifting circuit figure.
in each figure, between the circuit of same numeral, there is annexation.
embodiment:
embodiment 1:
a kind of Low Power Consumption Portable optical stresses monitoring equipment, its composition comprises: shell 3, linear power supply circuit 5 is installed in shell, linear power supply circuit respectively with control circuit 6, embedded host 4, fiber grating adjusting apparatus 2 connects, fiber grating adjusting apparatus is connected with one group of light grating sensor 1, control circuit is connected with embedded host, embedded host is connected with fiber grating adjusting apparatus, control circuit has linear power supply circuit, linear power supply circuit respectively with relay circuit 7, driving circuit 8, level shifting circuit 9, acp chip circuit 10, RS232 level shifting circuit 11 connects, acp chip circuit is provided with temperature sensor 12, acp chip circuit is connected with level shifting circuit, level shifting circuit is connected with driving circuit, driving circuit is connected with relay circuit.
embodiment 2:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1, the 3.3v power output end of described linear power supply circuit and described acp chip circuit R6 resistance, the NRST pin of STM32F103RET6 microcontroller connects, the NRST pin of capacitor C 2 and STM32F103RET6 microcontroller, earth terminal GND connects, resistance R 16 respectively with earth terminal GND, STM32F103RET6 microcontroller BOOT0 pin connects, resistance R 17 and earth terminal GND, STM32F103RET6 microcontroller BOOT1 pin connects, pin of crystal oscillator X1 and capacitor C 1, resistance R 1, STM32F103RET6 microcontroller OSC_IN/PD0 pin connects, described another pin of crystal oscillator X1 and capacitor C 5, resistance R 1, STM32F103RET6 microcontroller OSC_OUT/PD1 pin connects, pin of crystal oscillator X2 is connected with STM32F103RET6 microcontroller PC14-OSC32_IN pin, the described crystal oscillator X2 other end is connected with STM32F103RET6 microcontroller PC15-OSC32_OUT pin, No. 1 pin of boundary scan integrated circuit J13 is connected with earth terminal GDN, No. 2 pins of described boundary scan integrated circuit J13 are connected with STM32F103RET6 microcontroller SWCLK pin by pull-up resistor R9, No. 3 pins of described scan IC J13 are connected with STM32F103RET6 microcontroller SWDIO pin by pull-up resistor R12, No. 4 pins of described boundary scan integrated circuit J13 are connected with the 3.3v power output end of linear power supply circuit by 0 Europe resistance R 8.
embodiment 3:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1 or 2, described linear power supply circuit has 5v voltage input end and 3.3v power output end, described 3.3v power output end is connected with shunt capacitance C31 and capacitor C 33, described shunt capacitance C31 is connected with earth terminal GND with described capacitor C 33, described 5V voltage output end is connected with shunt capacitance C24 and capacitor C 27, capacitor C 27 is connected with linear voltage regulator REG1117-3.3, and described linear voltage regulator REG1117-3.3 is connected with shunt capacitance C31.
embodiment 4:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1, described level shifting circuit has highly integrated level shifting circuit, the integrated level shifting circuit VCCA of described height pin is connected with capacitor C 22, described capacitor C 22 is connected with+5V power supply, VCCB pin and the VC of capacitor C 29 and highly integrated level shifting circuit
cBpin connects.
embodiment 5:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1, described driving circuit has one group of ULN2003 chip, the OUT1 pin of described ULN2003 chip is connected with JQX-113M relay U3, the OUT2 pin of described ULN2003 chip is connected with JQX-113M relay U4, and the OUT3 pin of described ULN2003 chip is connected with JQX-113M relay U9.
embodiment 6:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1 or 2, described STM32F103RET6 microcontroller PD2 pin is connected with the DQ pin of temperature inductor DS18b20, the VDD pin of described temperature inductor DS18b20 is connected with resistance R 14 with+3V power supply, and described resistance R 14 is connected with DQ pin.
embodiment 7:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1 or 2, described RS232 level shifting circuit has transceiver SP3232EEN, described transceiver SP3232EEN is connected with RS232 1 interface, RS232 2 interfaces respectively, the C1+ pin of described transceiver SP3232EEN is connected by capacitor C 3 with C1-pin, and the C2+ pin of described transceiver SP3232EEN is connected by capacitor C 4 with C2-pin.
embodiment 8:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 1-7, described STM32F103RET6 microcontroller is after powering on, the signal of waiting system starting key, receive after signal, described STM32F103RET6 microcontroller postpones 500ms, opens the power supply of described fiber Bragg grating (FBG) demodulator power supply, Embedded PC/104 power supply, liquid crystal display, described embedded host moves automatically, configure fiber Bragg grating (FBG) demodulator by Ethernet interface, show correlation measure by liquid crystal display, in the time occurring that measured value exceedes prediction value, embedded host sends to control circuit by RS232 1 interface in described RS232 level shifting circuit and RS232 2 interfaces measured value, described level shifting circuit and driving circuit control hummer and light emitting diode, now press the REST key in described acp chip circuit, described STM32F103RET6 microcontroller receives signal, close honeybee give repeated exhortations device and light emitting diode, described RS232 level shifting circuit is transferred to embedded host.
embodiment 9:
according to the Low Power Consumption Portable optical stresses monitoring equipment described in embodiment 8, described Low Power Consumption Portable optical stresses monitoring equipment has two kinds of start-up modes: first kind of way starting key is closed, when pressing starting key and keeping 4S, microcontroller STM32F103RET6 in control circuit thinks that this is correct shutdown command, described STM32F103RET6 microcontroller is notified embedded host shutdown by RS232 level shifting circuit, described STM32F103RET6 microcontroller starts timing, in the time that timing reaches 60s, cut off embedded host power supply, touch-screen power supply, fiber grating adjusting apparatus power supply, TM32F103RET6 microcontroller cuts out hummer, light emitting diode, STM32F103RET6 microcontroller enters park mode, realizing starting key closes, the second menu shutdown system, receive user's shutdown command by described RS232 level shifting circuit notice STM32F103RET6 microcontroller, described embedded host does necessary shutdown processing, STM32F103RET6 microcontroller is received after shutdown command, start timing, when reaching after 60S, cut off Embedded PC/104 power supply, touch-screen power supply, fiber Bragg grating (FBG) demodulator power supply, close hummer, light emitting diode external equipment power supply, STM32F103RET6 microcontroller enters park mode, realizes menu shutdown system.
Claims (9)
1. a Low Power Consumption Portable optical stresses monitoring equipment, its composition comprises: shell, it is characterized in that: linear power supply circuit is installed in described shell, described linear power supply circuit respectively with control circuit, embedded host, fiber grating adjusting apparatus connects, described fiber grating adjusting apparatus is connected with one group of light grating sensor, described control circuit is connected with embedded host, described embedded host is connected with fiber grating adjusting apparatus, described control circuit has linear power supply circuit, described linear power supply circuit respectively with relay circuit, driving circuit, level shifting circuit, acp chip circuit, RS232 level shifting circuit connects, described acp chip circuit is provided with temperature sensor, described acp chip circuit is connected with described level shifting circuit, described level shifting circuit is connected with described driving circuit, described driving circuit is connected with described relay circuit.
2. Low Power Consumption Portable optical stresses monitoring equipment according to claim 1, it is characterized in that: the 3.3v power output end of described linear power supply circuit and described acp chip circuit R6 resistance, the NRST pin of STM32F103RET6 microcontroller connects, the NRST pin of capacitor C 2 and STM32F103RET6 microcontroller, earth terminal GND connects, resistance R 16 respectively with earth terminal GND, STM32F103RET6 microcontroller BOOT0 pin connects, resistance R 17 and earth terminal GND, STM32F103RET6 microcontroller BOOT1 pin connects, pin of crystal oscillator X1 and capacitor C 1, resistance R 1, STM32F103RET6 microcontroller OSC_IN/PD0 pin connects, described another pin of crystal oscillator X1 and capacitor C 5, resistance R 1, STM32F103RET6 microcontroller OSC_OUT/PD1 pin connects, pin of crystal oscillator X2 is connected with STM32F103RET6 microcontroller PC14-OSC32_IN pin, the described crystal oscillator X2 other end is connected with STM32F103RET6 microcontroller PC15-OSC32_OUT pin, No. 1 pin of boundary scan integrated circuit J13 is connected with earth terminal GDN, No. 2 pins of described boundary scan integrated circuit J13 are connected with STM32F103RET6 microcontroller SWCLK pin by pull-up resistor R9, No. 3 pins of described scan IC J13 are connected with STM32F103RET6 microcontroller SWDIO pin by pull-up resistor R12, No. 4 pins of described boundary scan integrated circuit J13 are connected with the 3.3v power output end of linear power supply circuit by 0 Europe resistance R 8.
3. Low Power Consumption Portable optical stresses monitoring equipment according to claim 1 and 2, it is characterized in that: described linear power supply circuit has 5v voltage input end and 3.3v power output end, described 3.3v power output end is connected with shunt capacitance C31 and capacitor C 33, described shunt capacitance C31 is connected with earth terminal GND with described capacitor C 33, described 5V voltage output end is connected with shunt capacitance C24 and capacitor C 27, capacitor C 27 is connected with linear voltage regulator REG1117-3.3, and described linear voltage regulator REG1117-3.3 is connected with shunt capacitance C31.
4. according to the Low Power Consumption Portable optical stresses monitoring equipment described in claim 1 or 2 or 3, it is characterized in that: described level shifting circuit has highly integrated level shifting circuit, the integrated level shifting circuit VCCA of described height pin is connected with capacitor C 22, described capacitor C 22 is connected with+5V power supply, VCCB pin and the VC of capacitor C 29 and highly integrated level shifting circuit
cBpin connects.
5. according to the Low Power Consumption Portable optical stresses monitoring equipment described in claim 1 or 2 or 3 or 4, it is characterized in that: described driving circuit has one group of ULN2003 chip, the OUT1 pin of described ULN2003 chip is connected with JQX-113M relay U3, the OUT2 pin of described ULN2003 chip is connected with JQX-113M relay U4, and the OUT3 pin of described ULN2003 chip is connected with JQX-113M relay U9.
6. according to the Low Power Consumption Portable optical stresses monitoring equipment described in claim 1 or 2 or 3 or 4 or 5, it is characterized in that: described STM32F103RET6 microcontroller PD2 pin is connected with the DQ pin of temperature inductor DS18b20, the VDD pin of described temperature inductor DS18b20 is connected with resistance R 14 with+3V power supply, and described resistance R 14 is connected with DQ pin.
7. according to the Low Power Consumption Portable optical stresses monitoring equipment described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: described RS232 level shifting circuit has transceiver SP3232EEN, described transceiver SP3232EEN is connected with RS232 1 interface, RS232 2 interfaces respectively, the C1+ pin of described transceiver SP3232EEN is connected by capacitor C 3 with C1-pin, and the C2+ pin of described transceiver SP3232EEN is connected by capacitor C 4 with C2-pin.
8. according to the Low Power Consumption Portable optical stresses monitoring equipment described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterized in that: described STM32F103RET6 microcontroller is after powering on, the signal of waiting system starting key, receive after signal, described STM32F103RET6 microcontroller postpones 500ms, opens the power supply of described fiber Bragg grating (FBG) demodulator power supply, Embedded PC/104 power supply, liquid crystal display, described embedded host moves automatically, configure fiber Bragg grating (FBG) demodulator by Ethernet interface, show correlation measure by liquid crystal display, in the time occurring that measured value exceedes prediction value, embedded host sends to control circuit by RS232 1 interface in described RS232 level shifting circuit and RS232 2 interfaces measured value, described level shifting circuit and driving circuit control hummer and light emitting diode, now press the REST key in described acp chip circuit, described STM32F103RET6 microcontroller receives signal, close honeybee give repeated exhortations device and light emitting diode, described RS232 level shifting circuit is transferred to embedded host.
9. Low Power Consumption Portable optical stresses monitoring equipment according to claim 8, it is characterized in that: described Low Power Consumption Portable optical stresses monitoring equipment has two kinds of start-up modes: first kind of way starting key is closed, when pressing starting key and keeping 4S, microcontroller STM32F103RET6 in control circuit thinks that this is correct shutdown command, described STM32F103RET6 microcontroller is notified embedded host shutdown by RS232 level shifting circuit, described STM32F103RET6 microcontroller starts timing, in the time that timing reaches 60s, cut off described embedded host power supply, touch-screen power supply, fiber grating adjusting apparatus power supply, TM32F103RET6 microcontroller cuts out hummer, light emitting diode, STM32F103RET6 microcontroller enters park mode, realizing starting key closes, the second menu shutdown system, receive user's shutdown command, by described RS232 level shifting circuit notice STM32F103RET6 microcontroller, described embedded host does necessary shutdown processing, STM32F103RET6 microcontroller is received after shutdown command, start timing, when reaching after 60S, cut off Embedded PC/104 power supply, touch-screen power supply, fiber Bragg grating (FBG) demodulator power supply, close hummer, light emitting diode external equipment power supply, STM32F103RET6 microcontroller enters park mode, realizes menu shutdown system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410210829.4A CN103954388A (en) | 2014-05-19 | 2014-05-19 | Low-power-consumption portable optical stress monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410210829.4A CN103954388A (en) | 2014-05-19 | 2014-05-19 | Low-power-consumption portable optical stress monitoring device |
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| CN103954388A true CN103954388A (en) | 2014-07-30 |
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Application publication date: 20140730 |