CN205247704U - Polymorphic type sensor teaching experiment system based on STM32 treater - Google Patents
Polymorphic type sensor teaching experiment system based on STM32 treater Download PDFInfo
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- CN205247704U CN205247704U CN201520895383.3U CN201520895383U CN205247704U CN 205247704 U CN205247704 U CN 205247704U CN 201520895383 U CN201520895383 U CN 201520895383U CN 205247704 U CN205247704 U CN 205247704U
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Abstract
The utility model relates to a polymorphic type sensor teaching experiment system based on STM32 treater, main control unit, the signal transmission that will gather to main control unit are connected to the sensor, button KEY and pilot lamp LED interface circuit connect main control unit for select sensor module, main control unit still links liquid crystal display for show data. The utility model discloses can let the performance of the better understanding sensor directly perceived of student, have more deep understanding and grasp to the collection of information: include fundamentals of sensors and characteristic, hardware circuit's links such as design, the correction of sensor performance, data processing and demonstration, make student further hoist capacity in practical application, reach the purpose of improving the quality of teaching.
Description
Technical field
The utility model relates to a kind of sensor teaching experiment field, specifically a kind of based on STM32 placeThe sensor teaching experiment system of reason device.
Background technology
Sensor is a kind ofly can detect measured information and be transformed into signal of telecommunication output according to certain ruleDevice, its digitlization, microminiaturization, intelligentized feature have been widely used every field. This realityWith novel be the embedded teaching platform of sensor, according to the actual demand of this major field, designDissimilar sensor, in teaching process, comprise establishing of Fundamentals of Sensors and characteristic, hardware circuitThe links such as meter, sensor performance correction, data processing and demonstration, further carry student in actual applicationsThe ability of liter, reaches the object of improving the quality of teaching.
Sensor Analog Relay System amount is carried out digital translation by teaching platform Usage data collection card at present, then upload to meterCalculation machine, utilizes process software on computer to data analysis, obtains experimental result. Although complete function,But volume is large, complex operation, student's participation is not strong, does not meet the New trend in teaching of Higher Vocational College.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of polymorphic type based on STM32 processor to passSensor teaching experiment system.
The technical scheme that the utility model adopted is for achieving the above object:
A sensor teaching experiment system based on STM32 processor, is characterized in that: sensingDevice connects master controller, and the signal collecting is sent to master controller; Button KEY and indicator lamp LEDInterface circuit connects master controller, for selecting sensor assembly; Master controller also connects LCDs, usesIn showing data.
Sensor comprises warm and humid sensor, temperature sensor, angular-rate sensor, linear velocity trans and pressurePower sensor.
Warm and humid sensor is connected master controller with temperature sensor by GPIO.
Pressure sensor connects master controller by AD converter again after amplifying circuit.
Angular-rate sensor is three number of axle word output gyroscopes, connects master controller by SPI interface.
Linear velocity trans is digital output sensors, connects master controller by IIC interface.
Described master controller is STM32 processor.
The utlity model has following beneficial effect and advantage:
1. the outstanding miniaturization of this utility model reserved expansion interface can be expanded and cut according to the needs of courseCut out.
2. choose the sensor of dissimilar interface, student is learned not in being familiar with dissimilar sensingWith the exploitation of interface.
3. choose the linear velocity trans that needs temperature-compensating, make student intuitively know from experience temperature parameter to deviceThe impact of energy.
4. use the processor chips of the market mainstream, immediately following the market demand.
Brief description of the drawings
Fig. 1 is hardware structure diagram of the present utility model;
Fig. 2 is method flow diagram of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Main control STM32 chooses model STM32F103ZE chip. This chip possesses high-performance low-power-consumption alsoAnd having abundant external interface, is the micro controller chip of current main flow.
Temperature Humidity Sensor module is chosen DHT11 chip, and this chip is aly to contain that to calibrate data signal defeatedThe humiture compound sensor going out, interface type is serial monobus, only needs a GPIO of main controller to connectConnect, can complete temperature and humidity according to the sequential of sensor read.
Temperature sensor module is chosen DS18B20 chip, and this chip is compared with Temperature Humidity Sensor, output temperatureDegree precision is higher, and precision is little latter one to decimal, does not need equally peripheral components only to need a GPIO pinJust can complete reading of temperature.
Pressure sensor is chosen SP20C-G501 resistance strain type sensor, because Wheatstone bridge tool suppresses temperatureThe advantages such as the impact that degree changes, suppresses to disturb, and compensation is convenient, so this sensor measurement precision is high, temperatureThe feature that characteristic is good. What this sensor was exported is ultra-weak electronic signal, needs hardware circuit to amplify it,Pass through again AD converter, choose successive approximation A/D converter ADS7805 chip, analog signal is turnedBeing changed to data signal is disciplined and is connected main controller by GPIO.
That angular-rate sensor is chosen is three number of axle word output gyroscope L3G4200D, can be directly by STM32Processor reads the data of three coordinate systems by SPI interface.
Linear velocity trans is chosen digital output sensors ADXL375, can be directly by STM32 processorRead the data of three coordinate systems by IIC interface.
5 buttons and 5 indicator lamps are connected to main control by GPIO.
Be illustrated in figure 2 method flow diagram of the present utility model, the course of work: after electrification reset, STM32Processor starts, and initializes indicator lamp LED, liquid crystal display and button KEY external interrupt is set. System entersNormal mode of operation, waits for external interrupt.
If KEYA is pressed in judgement, STM32 processor responds corresponding external interrupt, lights LEDA lamp,And Temperature Humidity Sensor is initialized, read temperature signal and moisture signal according to sensor sequential chart, conversionFor the decimal system is presented on LCD screen.
If press KEYB, STM32 processor responds corresponding external interrupt, lights LEDB lamp,And temperature sensor is initialized, read temperature signal conversion, finally result is presented to LCD screenOn.
If press KEYC, STM32 processor responds corresponding external interrupt, lights LEDC lamp,Linear velocity trans and temperature sensor are initialized and configured, and synchronized sampling linear velocity trans and temperature passThe information of sensor, compensates pressure sensor temperature by the value of temperature sensor, improves precision. Read 100The value of inferior each coordinate system is averaged, as the inclined to one side base value that zero-suppresses, for value time interval phase afterwardsTake advantage of replacement time integral, obtain the velocity shifts under coordinate system, result is presented on liquid crystal display.
If press KEYD, STM32 processor responds corresponding external interrupt, lights LEDD lamp, rightAngular-rate sensor initializes and configures, and the value that reads 100 each coordinate systems is averaged, as zero-suppressing partiallyBase value, for after the time interval replacement time integral that multiplies each other for value, obtain the angle under coordinate systemSkew, result is presented on liquid crystal display.
If press KEYE, STM32 processor responds corresponding external interrupt, lights LEDE lamp, rightPressure sensor initializes, and obtains the information of pressure sensor, and result is presented on liquid crystal display.
Claims (7)
1. the sensor teaching experiment system based on STM32 processor, is characterized in that: sensingDevice connects master controller, and the signal collecting is sent to master controller; Button KEY and indicator lamp LEDInterface circuit connects master controller, for selecting sensor assembly; Master controller also connects LCDs, usesIn showing data.
2. the sensor teaching experiment system based on STM32 processor according to claim 1,It is characterized in that: described sensor comprises warm and humid sensor, temperature sensor, angular-rate sensor, linear speedDegree sensor and pressure sensor.
3. the sensor teaching experiment system based on STM32 processor according to claim 2,It is characterized in that: described warm and humid sensor is connected master controller with temperature sensor by GPIO.
4. the sensor teaching experiment system based on STM32 processor according to claim 2,It is characterized in that: described pressure sensor connects master controller by AD converter again after amplifying circuit.
5. the sensor teaching experiment system based on STM32 processor according to claim 2,It is characterized in that: described angular-rate sensor is three number of axle word output gyroscopes, connect main by SPI interfaceController.
6. the sensor teaching experiment system based on STM32 processor according to claim 2,It is characterized in that: described linear velocity trans is digital output sensors, connect master controller by IIC interface.
7. according to the religion of the sensor based on STM32 processor described in any one of claim 1 or 3～6Learn experimental system, it is characterized in that: described master controller is STM32 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520895383.3U CN205247704U (en) | 2015-11-10 | 2015-11-10 | Polymorphic type sensor teaching experiment system based on STM32 treater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520895383.3U CN205247704U (en) | 2015-11-10 | 2015-11-10 | Polymorphic type sensor teaching experiment system based on STM32 treater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205247704U true CN205247704U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520895383.3U Expired - Fee Related CN205247704U (en) | 2015-11-10 | 2015-11-10 | Polymorphic type sensor teaching experiment system based on STM32 treater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781921A (en) * | 2017-01-18 | 2017-05-31 | 广州大学 | A kind of Internet of Things experimental box based on STM32 microcontrollers |
| CN109658787A (en) * | 2017-10-12 | 2019-04-19 | 江南大学 | A kind of open source Internet of Things infrastest platform |
-
2015
- 2015-11-10 CN CN201520895383.3U patent/CN205247704U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781921A (en) * | 2017-01-18 | 2017-05-31 | 广州大学 | A kind of Internet of Things experimental box based on STM32 microcontrollers |
| CN109658787A (en) * | 2017-10-12 | 2019-04-19 | 江南大学 | A kind of open source Internet of Things infrastest platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20161110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |