CN105628094A - Temperature and humidity acquisition terminal based on temperature complementation and acquisition method thereof - Google Patents
Temperature and humidity acquisition terminal based on temperature complementation and acquisition method thereof Download PDFInfo
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- CN105628094A CN105628094A CN201510976648.7A CN201510976648A CN105628094A CN 105628094 A CN105628094 A CN 105628094A CN 201510976648 A CN201510976648 A CN 201510976648A CN 105628094 A CN105628094 A CN 105628094A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention discloses a temperature and humidity acquisition terminal based on temperature complementation. The terminal comprises a PT100 temperature detection module, an SHT10 temperature and humidity detection module, a power supply module, a central processing unit module and an output unit module. The PT100 temperature detection module comprises a PT100 temperature probe and a signal processing circuit. The analog signal outputted by the PT100 temperature detection module is subjected by A/D conversion through the central processing unit module. The SHT10 temperature and humidity detection module comprises an SHT10 temperature and humidity probe and a signal processing circuit. The digital signal outputted by the SHT10 temperature and humidity detection module is connected to the central processing unit module through an IIC bus. The powe supply module is used for realizing the voltage switching of 24V to 12V and 24V to 5V. The output unit module comprises 0 to 10V voltage output, 4to20mA current output and a 485 serial output. The central processing unit module comprises a 4-bit DIP switch and is used for controlling temperature and humidity mode swtiching and output mode selection.
Description
Technical field
The invention belongs to sensor detecting field, be specifically related to a kind of humiture collection terminal complementary based on temperature and acquisition method thereof.
Background technology
Developing rapidly and applying along with high performance electronics, different industries is also more and more higher to the environmental requirement of temperature and humidity, and therefore how realizing high-precision Temperature and Humidity is the properly functioning Reliable guarantee of equipment. Traditional humiture collection device is typically chosen integrating device, although compared with independent harvester, cost significantly reduces, but humiture one harvester, in precision and reliability, performance significantly reduces, when temperature or Humidity Detection go wrong on the one hand, the use of whole equipment can be affected.
Summary of the invention
By overcoming the deficiency in conventional art, the problem that this invention address that is to provide a kind of humiture collection terminal complementary based on temperature, different mode of operations and output mode is selected, it is achieved the high precision test to the humiture of surrounding by toggle switch in CPU module.
For solving above-mentioned technical problem, the invention discloses a kind of humiture collection terminal complementary based on temperature, the invention discloses a kind of humiture collection terminal complementary based on temperature, it is characterized in that including PT100 temperature detecting module, SHT10 Temperature and Humidity module, power module, CPU module and output unit module, described PT100 temperature detecting module and described SHT10 Temperature and Humidity module are connected with described CPU module respectively, described CPU module also respectively with power module, output unit module is connected, it is characterized in that described output unit module is for exporting the output of 0-5V or 0-10V voltage, 4-20mA electric current exports, described CPU module includes the toggle switch of 4,
The toggle switch of described 4 includes N01, N02, N03 and N04, and described N01, N02 are used for controlling humiture working mode change, and described N03 and N04 selects for output mode,
Described N01, for starting PT100 temperature detecting module and SHT10 Temperature and Humidity module, detected by PT100 temperature detecting module and obtain temperature data, humidity data is obtained by the detection of SHT10 Temperature and Humidity module, and by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Described N02, is used for starting SHT10 Temperature and Humidity module, by CPU module, the humiture data receiving SHT10 is processed, output unit module form output 0-5V or 0-10V range;
Described N01 and described N02, when being additionally operable to start at the same time, PT100 temperature detecting module and SHT10 Temperature and Humidity module work simultaneously, by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, when PT100 temperature detecting module occurs abnormal, automatically switch to the temperature data of SHT10, output unit module form output 4-20mA;
Described N03, is used for exporting 0-5V range;
Described N04, is used for exporting 0-10V range;
Described N03 and N04, when being additionally operable to start at the same time, exports 4-20mA.
Preferably, described PT100 temperature detecting module includes PT100 temperature probe and signal processing circuit, and described PT100 temperature probe is used for detecting ambient temperature, and described signal processing circuit is for being amplified temperature signal and filtering, and forms output signal;
Described PT100 temperature detecting module adopts DC24V to power, range 0-100 DEG C, temperature range �� 0.3 DEG C, precision 0.3%, resolution 0.1%.
Preferably, described SHT10 Temperature and Humidity module includes SHT10 humiture probe and signal processing circuit, described SHT10 humiture probe is used for detecting ambient temperature and/or humidity, and described signal processing circuit is for being amplified temperature and/or moisture signal and filter, and forms output signal;
Described SHT10 Temperature and Humidity module adopts DC24V to power, and temperature range 0-100 DEG C, humidity range 5%RH-95%RH, temperature range �� 0.5 DEG C, humidity error scope, at RH5%RH��95%RH, is �� 3% when 25 DEG C, resolution 0.1%RH.
Preferably, described CPU module is connected with described PT100 temperature detecting module and described SHT10 Temperature and Humidity module respectively by iic bus, then preserve for first the analogue signal of the PT100 temperature detecting module received being carried out A/D conversion, for the digital signal of the SHT10 Temperature and Humidity module received is made directly preservation.
Preferably, described power module includes the decompression converting circuit 1 and the decompression converting circuit 2 that are connected in parallel, also include the power isolation circuit being connected in series with described decompression converting circuit 2, described decompression converting circuit 1 forms the DC source of output 12V for the 24V DC source of input carries out voltage conversion, described decompression converting circuit 2 forms the DC source of output 5V for the 24V DC source of input carries out voltage conversion, then pass through described power isolation circuit and realize the isolation of analog circuit and digital circuit, form the DC source output of 5V.
Preferably, described decompression converting circuit 1 includes voltage dropping power supply changer MC34063 chip, for the input voltage of 24V is converted to the output voltage of 12V;
Described decompression converting circuit 2 includes lowering and stabilizing blood pressure chip P3596L, for the input voltage of 24V is converted to the output voltage of 5V;
Described power isolation circuit includes isolating chip B0505LS, for realizing the isolation of analog circuit and digital circuit, forms the DC source output of 5V.
Preferably, described output unit module also includes 485 serial ports outputs, and described 485 serial ports outputs are used for realizing the transmission of remote data, and the collection data of humiture are sent to long-range data monitor center.
Preferably, described CPU module includes microprocessor, and described microprocessor is 8 AVR microprocessors.
The invention also discloses a kind of humiture collection method complementary based on temperature, including three kinds of mode of operations:
Mode of operation one: open N01, start PT100 temperature detecting module and SHT10 Temperature and Humidity module, PT100 temperature detecting module detects and obtains temperature data, the detection of SHT10 Temperature and Humidity module obtains humidity data, and by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Open N03, be used for exporting 0-5V range; Or
Open N04, be used for exporting 0-10V range;
Mode of operation two:
Open N02, be used for starting SHT10 Temperature and Humidity module, by CPU module, the humiture data receiving SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Open N03, be used for exporting 0-5V range; Or
Open N04, be used for exporting 0-10V range;
Mode of operation three:
Open N01 and N02 simultaneously, start PT100 temperature detecting module and SHT10 Temperature and Humidity module simultaneously, by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, when PT100 temperature detecting module occurs abnormal, automatically switch to the temperature data of SHT10, output unit module form output 4-20mA;
Open N03 and N04 simultaneously, export 4-20mA.
Microprocessor in CPU module adopts ATmega88, and it is 8 AVR microprocessors of a high-performance, low-power consumption.
The invention has the beneficial effects as follows: the temperature detecting module of SHT10 Temperature and Humidity module and PT100 carries out complementation, when one of them module temperature detects unsuccessfully, automatically switch to another one and carry out temperature detection, do not affect the normal use of user, in addition, output unit module is provided with three kinds of mode of operations, also supports the remote transmission of data, it is achieved the Distant supervision and control of site environment while supporting conventional industrial outputting standard.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention, in the accompanying drawings:
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the power module figure of the present invention.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments, the present invention is described in detail.
In order to make the technical problem to be solved in the present invention and advantage clearly, it is described in detail below in conjunction with accompanying drawing and instantiation.
In order to make the technical problem to be solved in the present invention clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, the invention discloses a kind of humiture collection terminal complementary based on temperature, it is characterized in that including PT100 temperature detecting module, SHT10 Temperature and Humidity module, power module, CPU module and output unit module, described PT100 temperature detecting module and described SHT10 Temperature and Humidity module are connected with described CPU module respectively, described CPU module also respectively with power module, output unit module is connected, PT100 temperature detecting module includes PT100 temperature probe and signal processing circuit, the output signal of PT100 temperature detecting module carries out A/D conversion by CPU module, SHT10 Temperature and Humidity module includes SHT10 humiture probe and signal processing circuit, and the output signal of SHT10 Temperature and Humidity module is connected with CPU module by iic bus, power module realizes the voltage conversion of 24V-12V, 24V-5V, output unit module includes the voltage output of 0-10V range, the output of 4-20mA electric current and 485 serial ports outputs, CPU module includes the toggle switch of 4, is used for controlling humiture working mode change and output mode selection.
The toggle switch of described 4 includes N01, N02, N03 and N04, and described N01, N02 are used for controlling humiture working mode change, and described N03 and N04 selects for output mode,
Described N01, for starting PT100 temperature detecting module and SHT10 Temperature and Humidity module, detected by PT100 temperature detecting module and obtain temperature data, humidity data is obtained by the detection of SHT10 Temperature and Humidity module, and by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Described N02, is used for starting SHT10 Temperature and Humidity module, by CPU module, the humiture data receiving SHT10 is processed, output unit module form output 0-5V or 0-10V range;
Described N01 and described N02, when being additionally operable to start at the same time, PT100 temperature detecting module and SHT10 Temperature and Humidity module work simultaneously, by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, when PT100 temperature detecting module occurs abnormal, automatically switch to the temperature data of SHT10, output unit module form output 4-20mA;
Described N03, is used for exporting 0-5V range;
Described N04, is used for exporting 0-10V range;
Described N03 and N04, when being additionally operable to start at the same time, exports 4-20mA.
Humiture collection terminal overall work process is: first select toggle switch, with mode of operation one, start NO1, PT100 temperature probe first detects the temperature of environment, and amplification and the filtering of signal is realized by signal processing circuit, the PT100 temperature data received is AD converted by the microprocessor in CPU, then passes through the voltage of pwm pulse width modulation conversions output 0-5V or 0-10V; Secondly the temperature and humidity of SHT10 humiture probe detection environment, communicated by iic bus and CPU module, humidity data therein is processed by microprocessor, and by the voltage of PWM conversion output 0-5V or 0-10V, last voltage is by the electric current of discharge circuit output 0-20mA, and 485 reserved communication interfaces are used for and other communication between devices.
The output of described 0-10V voltage and the output of 4-20mA electric current meet output voltage and the current standard of industrial automation.
As shown in Figure 2, described power module includes the decompression converting circuit 1 and the decompression converting circuit 2 that are connected in parallel, also include the power isolation circuit being connected in series with described decompression converting circuit 2, described decompression converting circuit 1 forms the DC source of output 12V for the 24V DC source of input carries out voltage conversion, described decompression converting circuit 2 forms the DC source of output 5V for the 24V DC source of input carries out voltage conversion, then pass through described power isolation circuit and realize the isolation of analog circuit and digital circuit, form the DC source output of 5V.
Power module includes the voltage transformation of three parts, and the 24V DC source first inputted carries out voltage conversion, the DC source of output 12V by decompression converting circuit 1. Main employing voltage dropping power supply changer MC34063 chip realizes blood pressure lowering conversion; Secondly the 24V DC source of input carries out voltage conversion, the DC source of output 5V by decompression converting circuit 2, and circuit adopts lowering and stabilizing blood pressure chip P3596L to realize blood pressure lowering conversion; The 5V DC source of output realizes the isolation of analog circuit and digital circuit by power isolation circuit, and power isolation circuit mainly adopts isolating chip B0505LS to realize.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (9)
1. the humiture collection terminal based on temperature complementation, it is characterized in that including PT100 temperature detecting module, SHT10 Temperature and Humidity module, power module, CPU module and output unit module, described PT100 temperature detecting module and described SHT10 Temperature and Humidity module are connected with described CPU module respectively, described CPU module also respectively with power module, output unit module is connected, it is characterized in that described output unit module is for exporting the output of 0-5V or 0-10V voltage, 4-20mA electric current exports, described CPU module includes the toggle switch of 4,
The toggle switch of described 4 includes N01, N02, N03 and N04, and described N01, N02 are used for controlling humiture working mode change, and described N03 and N04 selects for output mode,
Described N01, for starting PT100 temperature detecting module and SHT10 Temperature and Humidity module, detected by PT100 temperature detecting module and obtain temperature data, humidity data is obtained by the detection of SHT10 Temperature and Humidity module, and by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Described N02, is used for starting SHT10 Temperature and Humidity module, by CPU module, the humiture data receiving SHT10 is processed, output unit module form output 0-5V or 0-10V range;
Described N01 and described N02, when being additionally operable to start at the same time, PT100 temperature detecting module and SHT10 Temperature and Humidity module work simultaneously, by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, when PT100 temperature detecting module occurs abnormal, automatically switch to the temperature data of SHT10, output unit module form output 4-20mA;
Described N03, is used for exporting 0-5V range;
Described N04, is used for exporting 0-10V range;
Described N03 and N04, when being additionally operable to start at the same time, exports 4-20mA.
2. the humiture collection terminal complementary based on temperature according to claim 1, it is characterized in that described PT100 temperature detecting module includes PT100 temperature probe and signal processing circuit, described PT100 temperature probe is used for detecting ambient temperature, described signal processing circuit is for being amplified temperature signal and filtering, and forms output signal;
Described PT100 temperature detecting module adopts DC24V to power, range 0-100 DEG C, temperature range �� 0.3 DEG C, precision 0.3%, resolution 0.1%.
3. the humiture collection terminal complementary based on temperature according to claim 1, it is characterized in that described SHT10 Temperature and Humidity module includes SHT10 humiture probe and signal processing circuit, described SHT10 humiture probe is used for detecting ambient temperature and/or humidity, described signal processing circuit is for being amplified temperature and/or moisture signal and filter, and forms output signal;
Described SHT10 Temperature and Humidity module adopts DC24V to power, and temperature range 0-100 DEG C, humidity range 5%RH-95%RH, temperature range �� 0.5 DEG C, humidity error scope, at RH5%RH��95%RH, is �� 3% when 25 DEG C, resolution 0.1%RH.
4. the humiture collection terminal complementary based on temperature according to claim 1, it is characterized in that described CPU module is connected with described PT100 temperature detecting module and described SHT10 Temperature and Humidity module respectively by iic bus, then preserve for first the analogue signal of the PT100 temperature detecting module received being carried out A/D conversion, for the digital signal of the SHT10 Temperature and Humidity module received is made directly preservation.
5. a kind of humiture collection terminal complementary based on temperature according to claim 1, it is characterized in that decompression converting circuit 1 and decompression converting circuit 2 that described power module includes being connected in parallel, also include the power isolation circuit being connected in series with described decompression converting circuit 2, described decompression converting circuit 1 forms the DC source of output 12V for the 24V DC source of input carries out voltage conversion, described decompression converting circuit 2 forms the DC source of output 5V for the 24V DC source of input carries out voltage conversion, then pass through described power isolation circuit and realize the isolation of analog circuit and digital circuit, form the DC source output of 5V.
6. a kind of humiture collection terminal complementary based on temperature according to claim 5, it is characterised in that
Described decompression converting circuit 1 includes voltage dropping power supply changer MC34063 chip, for the input voltage of 24V is converted to the output voltage of 12V;
Described decompression converting circuit 2 includes lowering and stabilizing blood pressure chip P3596L, for the input voltage of 24V is converted to the output voltage of 5V;
Described power isolation circuit includes isolating chip B0505LS, for realizing the isolation of analog circuit and digital circuit, forms the DC source output of 5V.
7. the humiture collection terminal complementary based on temperature according to claim 1, it is characterized in that described output unit module also includes 485 serial ports outputs, described 485 serial ports outputs are used for realizing the transmission of remote data, and the collection data of humiture are sent to long-range data monitor center.
8. a kind of humiture collection terminal complementary based on temperature according to claim 1, it is characterised in that CPU module includes microprocessor, and described microprocessor is 8 AVR microprocessors.
9. based on the humiture collection method that temperature is complementary, including three kinds of mode of operations:
Mode of operation one: open N01, start PT100 temperature detecting module and SHT10 Temperature and Humidity module, PT100 temperature detecting module detects and obtains temperature data, the detection of SHT10 Temperature and Humidity module obtains humidity data, and by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Open N03, be used for exporting 0-5V range; Or
Open N04, be used for exporting 0-10V range;
Mode of operation two:
Open N02, be used for starting SHT10 Temperature and Humidity module, by CPU module, the humiture data receiving SHT10 are processed, output unit module form output 0-5V or 0-10V range;
Open N03, be used for exporting 0-5V range; Or
Open N04, be used for exporting 0-10V range;
Mode of operation three:
Open N01 and N02 simultaneously, start PT100 temperature detecting module and SHT10 Temperature and Humidity module simultaneously, by CPU module, the PT100 temperature data of reception and the humidity data of SHT10 are processed, when PT100 temperature detecting module occurs abnormal, automatically switch to the temperature data of SHT10, output unit module form output 4-20mA;
Open N03 and N04 simultaneously, export 4-20mA.
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Cited By (1)
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