CN214200472U - Double-circuit backup temperature and humidity atmospheric pressure sensor - Google Patents
Double-circuit backup temperature and humidity atmospheric pressure sensor Download PDFInfo
- Publication number
- CN214200472U CN214200472U CN202120530323.7U CN202120530323U CN214200472U CN 214200472 U CN214200472 U CN 214200472U CN 202120530323 U CN202120530323 U CN 202120530323U CN 214200472 U CN214200472 U CN 214200472U
- Authority
- CN
- China
- Prior art keywords
- temperature
- humidity
- atmospheric pressure
- pressure sensor
- microprocessor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a double-circuit backup temperature and humidity atmospheric pressure sensor, which comprises an atmospheric pressure sensor module, wherein the atmospheric pressure sensor module comprises a microprocessor and atmospheric pressure sensors connected with the microprocessor, and also comprises two temperature and humidity sensors which are connected with the microprocessor through temperature and humidity sensor plugs; when the temperature and humidity sensors work normally, the average value of the measurement data of the two temperature and humidity sensors is taken as a measurement value, and when one temperature and humidity sensor is damaged, the value of the temperature and humidity sensor with normal reading is taken as the measurement value. The utility model discloses a humiture atmospheric pressure sensor mainly used measures ambient temperature, ambient humidity, ambient atmospheric pressure, adopts two temperature and humidity sensors, and normal measurement volume gets the average value of the measured data of two sensors, has under the condition that a temperature and humidity sensor damaged, gets the sensor value that the reading is normal, has improved the durability of product when guaranteeing the accuracy.
Description
Technical Field
The utility model relates to a sensor art field especially relates to a backup humiture atmospheric pressure sensor of double-circuit.
Background
The existing atmospheric pressure sensor can only measure the atmospheric pressure value, even if the temperature and humidity value can be measured, only one temperature and humidity sensor is adopted for measurement, and the high-precision measurement requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect who exists among the prior art, and provide a backup humiture atmospheric pressure sensor of double-circuit, adopted two temperature and humidity sensors, get the average value of two sensors during normal measurement, make measured data more accurate, when a temperature and humidity sensor damages, the module still can normally measure the humiture, the unusual condition of humiture can not appear.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
a double-path backup temperature and humidity atmospheric pressure sensor comprises an atmospheric pressure sensor module, wherein the atmospheric pressure sensor module comprises a microprocessor and atmospheric pressure sensors connected with the microprocessor, and is characterized by further comprising two temperature and humidity sensors which are connected with the microprocessor through temperature and humidity sensor plugs; when the temperature and humidity sensors work normally, the average value of the measurement data of the two temperature and humidity sensors is taken as a measurement value, and when one temperature and humidity sensor is damaged, the value of the temperature and humidity sensor with normal reading is taken as the measurement value.
Preferably, wherein, temperature and humidity sensor and microprocessor are connected through I2C communication mode, and atmospheric pressure sensor and microprocessor are connected through SPI communication mode.
Preferably, the temperature and humidity sensor is SHT31, and the atmospheric pressure sensor is BMP 280.
Preferably, the microprocessor is connected with a 485 communication interface for communicating with an external terminal.
The utility model discloses a humiture atmospheric pressure sensor mainly used measures ambient temperature, ambient humidity, ambient atmospheric pressure, adopts two temperature and humidity sensors, and normal measurement volume gets the average value of the measured data of two sensors, has under the condition that a temperature and humidity sensor damaged, gets the sensor value that the reading is normal, has improved the durability of product when guaranteeing the accuracy.
Drawings
Fig. 1 is a schematic structural diagram of a two-way backup temperature, humidity and atmospheric pressure sensor of the present invention;
FIG. 2 is a power circuit diagram of a portion of a dual-path backup temperature, humidity, and atmospheric pressure sensor;
FIG. 3 is another diagram of a power circuit of a dual-path backup temperature, humidity and atmospheric pressure sensor;
FIG. 4 is a circuit diagram of a microprocessor;
FIG. 5 is a circuit diagram of an atmospheric pressure sensor;
FIG. 6 is a circuit diagram of a 485 communication interface;
FIG. 7 is a circuit diagram of a temperature and humidity sensor plug;
fig. 8 is a circuit diagram of a first temperature and humidity sensor;
fig. 9 is a circuit diagram of the second temperature/humidity sensor.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-9, the dual-path backup temperature/humidity/atmospheric pressure sensor of the present invention comprises an atmospheric pressure sensor module, wherein the atmospheric pressure sensor module comprises a microprocessor U1 and an atmospheric pressure sensor connected to a U1 of the microprocessor, and is characterized by further comprising two temperature/humidity sensors, and the two temperature/humidity sensors are connected to the microprocessor through temperature/humidity sensor plugs; when the temperature and humidity sensors work normally, the average value of the measurement data of the two temperature and humidity sensors is taken as a measurement value, and when one temperature and humidity sensor is damaged, the value of the temperature and humidity sensor with normal reading is taken as the measurement value.
Wherein, temperature and humidity sensor and microprocessor U1 pass through I2C communication mode and are connected, and atmospheric pressure sensor and microprocessor U1 pass through SPI communication mode and are connected, have adopted two temperature and humidity sensors, get the average value of two sensors during normal measurement, make measured data more accurate, when a temperature and humidity sensor damages, still can normally measure the humiture, the unusual condition of humiture can not appear.
When measuring the humiture, temperature and humidity data are gathered to first temperature and humidity sensor and second temperature and humidity sensor, and data transmit to the microprocessor U1 of atmospheric pressure sensor module through I2C communication mode, and microprocessor U1 receives data and handles, and temperature and humidity numerical value carry out communication transmission through 485 communication mode and other terminals.
Collecting atmospheric pressure data: atmospheric pressure sensor gathers atmospheric pressure data, transmits the microprocessor U1 to atmospheric pressure sensor module through SPI communication mode, and microprocessor U1 received data and handles, and the atmospheric pressure value carries out communication transmission through 485 communication mode and other terminals.
Wherein, the 485 communication interface comprises a processing chip U4(SP3485EN-L/TR, 3.3V low power consumption half-duplex RS-485 transceiver) and a U5(PSM712-LE-T7, transient suppression diode unit), the microprocessor adopts HC32F003C4PA minimum processor circuit, the power supply module adopts a power supply chip U2(HT7533-1_ C1429) to realize that the direct current 12V is changed into the working 3.3V to supply power for the functional module, pins A and B of the 485 communication interface are connected with a connector CN1(XH2.54-4AW), the atmospheric pressure sensor adopts U3(SPL06-007),
wherein, the utility model discloses set up power module, for work module provides DC12V power supply, atmospheric pressure sensor is direct integrated on humiture atmospheric pressure transmitting plate, need not outside wiring. An external interface of the temperature and humidity atmospheric transmission board adopts a 4P wiring terminal P1(PH-4AW) and is connected with a temperature and humidity sensor to realize transmission of temperature and humidity data.
The measurement parameters are as follows:
1. the temperature measurement range is-40 to 125 ℃, and the precision is as follows: absolute deviation < + > -0.3 ℃.
2. The humidity measurement range is 0-100% RH; precision: absolute deviation 2% RH.
3. The air pressure measurement range is 0-20000 hpa; precision: + -0.12 hpa.
4. Temperature and humidity sensor and atmospheric pressure sensor power supply 3.3V (DC), communication interface I2C (temperature and humidity sensor), SPI (atmospheric pressure sensor).
5. The temperature and humidity atmospheric pressure transmitting board supplies power for 12V (DC), and the communication interface RS 485.
The working principle of the utility model is as follows:
the utility model discloses double-circuit backup humiture atmospheric pressure sensor for environment humiture and atmospheric pressure measure, the humiture sensor model is SHT31-DIS-B, and atmospheric pressure sensor is BMP280, two foot joints of SDA, SCL of two humiture sensors pull-up resistance R1, R2.
The temperature measurement of the temperature and humidity sensor adopts thermocouple temperature, the thermocouple is composed of two metal wires made of different materials, one ends of the two metal wires are welded together to form a working end, and the working end is arranged at the position of the measured temperature; the other end is called a free end and is connected with a measuring instrument to form a closed loop. When the temperature of the working end is different from that of the free end, thermal electromotive force appears in the loop, and the voltage change is transmitted to the single chip microcomputer through the conversion of the circuit and converted into a signal which can be recognized by a machine.
The humiture sensor uses polyamine salt or acetate fiber polymer film (a high molecular compound) deposited on two conductive electrodes to change the dielectric constant between the two electrodes when the film absorbs or loses water. The capacitance of the capacitor is changed, and the capacitance change of the capacitor can be captured and converted by an external measuring circuit, and finally displayed as an easily-recognized signal at an output end.
The temperature and humidity measurement of the temperature and humidity sensors adopts the average value of the measurement values of the two temperature and humidity sensors, and when one temperature and humidity sensor is damaged, the other temperature and humidity sensor is used for measuring the normal temperature and humidity sensor value; the atmospheric pressure measurement is calculated from the measured values and the calibrated values (obtained initially).
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A double-path backup temperature and humidity atmospheric pressure sensor comprises an atmospheric pressure sensor module, wherein the atmospheric pressure sensor module comprises a microprocessor and atmospheric pressure sensors connected with the microprocessor, and is characterized by further comprising two temperature and humidity sensors which are connected with the microprocessor through temperature and humidity sensor plugs; when the temperature and humidity sensors work normally, the average value of the measurement data of the two temperature and humidity sensors is taken as a measurement value, and when one temperature and humidity sensor is damaged, the value of the temperature and humidity sensor with normal reading is taken as the measurement value.
2. The dual-path backup temperature and humidity atmospheric pressure sensor according to claim 1, wherein the temperature and humidity sensor is connected with the microprocessor through an I2C communication mode, and the atmospheric pressure sensor is connected with the microprocessor through an SPI communication mode.
3. The dual-path backup temperature, humidity and atmospheric pressure sensor according to claim 1, wherein the temperature, humidity and atmospheric pressure sensor is SHT31, and the atmospheric pressure sensor is BMP 280.
4. The dual-path backup temperature, humidity and atmospheric pressure sensor according to claim 1, wherein the microprocessor is connected with a 485 communication interface for communicating with an external terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120530323.7U CN214200472U (en) | 2021-03-15 | 2021-03-15 | Double-circuit backup temperature and humidity atmospheric pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120530323.7U CN214200472U (en) | 2021-03-15 | 2021-03-15 | Double-circuit backup temperature and humidity atmospheric pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214200472U true CN214200472U (en) | 2021-09-14 |
Family
ID=77639835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120530323.7U Active CN214200472U (en) | 2021-03-15 | 2021-03-15 | Double-circuit backup temperature and humidity atmospheric pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214200472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880909A (en) * | 2021-03-15 | 2021-06-01 | 天津智易时代科技发展有限公司 | Double-circuit backup temperature and humidity atmospheric pressure sensor |
-
2021
- 2021-03-15 CN CN202120530323.7U patent/CN214200472U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880909A (en) * | 2021-03-15 | 2021-06-01 | 天津智易时代科技发展有限公司 | Double-circuit backup temperature and humidity atmospheric pressure sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101398405A (en) | Water electric conductivity intelligent sensor | |
| CN214200472U (en) | Double-circuit backup temperature and humidity atmospheric pressure sensor | |
| CN209230815U (en) | Charging gun temperature sensing circuit and charging gun | |
| CN209656613U (en) | A kind of two-channel digital TDS sensor | |
| CN106248240A (en) | A kind of temperature transmitter with temperature-compensating | |
| CN211626739U (en) | PT100 platinum thermal resistance temperature sampling circuit | |
| CN112880909A (en) | Double-circuit backup temperature and humidity atmospheric pressure sensor | |
| CN211377990U (en) | Sensor signal conditioning circuit | |
| CN216160075U (en) | Pressure detection device based on NB-IoT technology | |
| CN212342942U (en) | Transmission line that possesses temperature and humidity measurement function | |
| CN110274704B (en) | Temperature detection system | |
| CN212301927U (en) | Device for detecting surface icing | |
| CN210571127U (en) | Tension sensor | |
| CN210109014U (en) | TDS detection system based on fluid water quality | |
| CN209541782U (en) | Self-correction intelligence sensor | |
| CN2527988Y (en) | Temp. vibrating digifax composite sensor | |
| CN219608826U (en) | Multi-parameter water environment detection sensor | |
| CN207649787U (en) | A kind of motor temperature measuring circuit of band output isolation | |
| CN220932860U (en) | Acid-base strength detection sensor | |
| CN212458548U (en) | High-precision non-contact liquid level sensor | |
| CN206905930U (en) | Suitable for the two, temperature sampling circuit of three-wire system temperature sensor | |
| CN201259725Y (en) | Electric cable humidity probe | |
| CN205228686U (en) | Ressure measurement appearance | |
| CN216116245U (en) | Liquid level sensor with diffused silicon type pressure detection circuit | |
| CN218156268U (en) | Multi-parameter measuring digital sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |