CN202710233U - Intelligent atmospheric pressure measuring device - Google Patents
Intelligent atmospheric pressure measuring device Download PDFInfo
- Publication number
- CN202710233U CN202710233U CN201220401418.XU CN201220401418U CN202710233U CN 202710233 U CN202710233 U CN 202710233U CN 201220401418 U CN201220401418 U CN 201220401418U CN 202710233 U CN202710233 U CN 202710233U
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- atmospheric pressure
- microcontroller
- data acquisition
- acquisition circuit
- baroceptor
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Abstract
The utility model discloses an intelligent atmospheric pressure measuring device which includes a shell, a mounting base plate, a sensor module, a data acquisition circuit board, a pressure-leading conduit and an pneumatic rapid joint, wherein the mounting base plate is fixed at the bottom of the shell; the sensor module, the data acquisition circuit board and the pressure-leading conduit are arranged in the shell; the data acquisition circuit board is fixed inside the shell; and the sensor module is welded on the data acquisition circuit board through double rows of insertion pins. The sensor module comprises an atmospheric pressure sensing element and an active crystal oscillator. The atmospheric pressure sensing element adopts an intelligent integrated atmospheric pressure sensing element MS5534C which can measure atmospheric pressure within a range from 500 to 1100 hPa, and the atmospheric pressure sensing element is connected with a microcontroller through an SPI digital interface. The microcontroller adopts an eight-bit enhanced type microcontroller, and a data interface unit input end is connected with the microcontroller. The intelligent atmospheric pressure measuring device has the characteristics of small volume, fast response speed, high measuring precision, digital compensation and the like, and can be widely applied to occasions such as a marine environment monitoring station, a ground meteorological station and a ship meteorological station for the measurement of the atmospheric pressure.
Description
Technical field
The utility model relates to the atmosphere environment supervision device, particularly relates to a kind of device of measuring atmospheric pressure.
Background technology
Atmospheric pressure and daily life are closely related.At numerous areas such as meteorological observation, sail, space flight sounding, energy development, traffic for tourism, environmental protection, often need to measure atmospheric pressure.Barometric observation also is the routine observation project of marine environmental monitoring station and naval vessel meteorology, and barometric surveying plays very important effect in these fields.
The atmospheric pressure measurement instrument is constantly updated and is developed, and has developed into digital vibration cylinder barograph now commonly used from early stage glass mercury rain glass, aneroid pressure meter and hypsometer, has realized the robotization of barometric observation.Existing robotization atmospheric pressure measurement instrument, the measuring principle that adopts is different, have following problem in the use procedure: 1, the vibration cylinder type barograph after its inner temperature sensor of process carries out temperature compensation, calculates atmospheric pressure by gathering the vibration frequency amount of vibrator-type sensor.The advantages such as measuring accuracy is high although it has, good stability, broad quantum, response are fast, the volume of instrument is relatively large, is only applicable in the surface weather observation system, in vibration with wave on the larger naval vessel and inapplicable.Generally use aneroid barometer to carry out barometric observation on the naval vessel at present, but this rain glass requires to be placed on temperature evenly to be become less, do not have in thermal source, the not direct room with good ventilation, to avoid all the time sun direct irradiation, higher to environmental requirement, and need to behind artificial observation, correct data, personnel labor intensity is large, easily make mistakes, can't adapt to unattended demand.2, the sensitive element of partial automation barometric surveying equipment adopts discrete small signal simulation output semiconductor device, need signal processing circuit that input signal is carried out filtering, shaping and amplification, the conditioning metering circuit is complicated, and measuring accuracy easily is subject to the impact that the analog device temperature is floated.3, because temperature is more remarkable on the measurement result impact of air pressure, metering circuit need to be introduced the relevant temperature metering circuit and calculate calibration, its two parts circuit usually can not unite two into one, increased design complexities, air pressure acquisition and temperature are floated calibration circuit and are not adopted high-performance microcontroller management and control, and intelligent degree is lower.4. owing to adopting analog output, the survey report that domestic consumer can not provide according to standard metering department is calibrating sensors voluntarily, needs calibrate to regular producer, has increased customer using cost, can't uninterruptedly use online.
The utility model content
For the existing problem of the atmospheric pressure measurement of prior art, the utility model is released a kind of intelligent atmospheric pressure measurement device, and digital baroceptor, data acquisition circuit, the high-performance microcontroller of integrated temperature sensor combined.This device adopts Design of Digital Circuit, overcome the shortcoming that the design of traditional analog modulate circuit is complicated, precision is subject to device temperature drift impact, can realize for a long time, continuously, automatically measuring atmospheric pressure, and have the intelligent characteristics such as digital output, self calibration, automatic Calibration, can satisfy ground Meteorological Observation System and naval vessel for the demand of unmanned air pressure Continuous Observation.
The related intelligent atmospheric pressure measurement device of the utility model comprises housing, mounting base, sensor assembly, data acquisition circuit plate, impulse conduit, Pneumatic quick connector.Mounting base is fixed on housing bottom, and sensor assembly, data acquisition circuit plate and impulse conduit are arranged in the housing, and data acquisition circuit plate stationary housing is inner, and sensor assembly is welded on the data acquisition circuit plate by double contact pin; The lateral opening hole of housing is installed connection terminal; The data acquisition circuit plate comprises microcontroller, power supply unit, data interface unit, geocoding unit; Sensor assembly mainly comprises baroceptor and active crystal oscillator, and they directly are welded on the sensor assembly, and baroceptor adopts intelligent integrated baroceptor MS5534C, with the interface mode of microcontroller be the SPI digital interface; Impulse conduit one end connects baroceptor, and the other end connects the Pneumatic quick connector that is arranged on the housing side; Power supply unit output is connected to the power supply input pin of microcontroller, sensor assembly, data interface unit; Microcontroller adopts 8 enhancement mode microcontrollers; The data interface unit input end connects microcontroller.
Housing is frame-shaped construction, adopt cast aluminum alloy material, but the connection terminal of AKZ1700-3.81 type 5 core plugs is installed in the side, and signal conductor one end spins with this connection terminal after by the European pressure line terminal crimping of insulating, and the other end is plugged into mutually with the external pressure data acquisition unit.
The mounting base two ends are circular arc, use bolt to fix by internal thread and the housing of housing.The impulse conduit is used for carrying out the device pressure calibration, the stainless steel protection cover of the baroceptor of its end connecting sensor module, and an end connects Pneumatic quick connector.Pneumatic quick connector is fixed on the shell side after passing cast aluminium alloy shell round tube hole.
The power supply unit of data acquisition circuit plate adopts the secondary power supply Managed Solution, be responsible for the power supply of input is carried out conversion, the first order adopts the switching power source chip of 5V output, its 5V output connects the input of the linear LDO chip in the second level, and the 3V output of LDO chip is connected to the power supply input pin of microcontroller, sensor assembly, data interface unit.Microcontroller is the core of Acquisition Circuit, is responsible for the operation and control of intelligent atmospheric pressure measurement device.Data interface unit is responsible for finishing the signal conversion work of sensor Digital output, and its input end is connected to the UART0 of microcontroller, and output terminal is connected to connection terminal.The geocoding unit is used for arranging the geocoding of this atmospheric pressure measurement device, and maximum number of addresses is 64, and spendable address realm is 0-63, and coding unit adopts toggle switch to be connected to 6 I/O interfaces of microcontroller by pull-up resistor.
Sensor assembly mainly comprises baroceptor and active crystal oscillator.Sensor assembly is fixed on the data acquisition circuit plate by double contact pin.Baroceptor adopts the integrated baroceptor of MEMS type intelligence, includes temperature sensor, can carry out the temperature compensation correction to measurement result.Baroceptor and the required active crystal oscillator of its operation directly are welded on the sensor assembly, and the frequency of active crystal oscillator is 32.768KHz.The 3rd pin output of active crystal oscillator is connected to the major clock of baroceptor and inputs the 5th pin MCLK.Sensor assembly is soldered to the data acquisition circuit plate by the double contact pin of 5 cores, and power supply and the microcontroller signal connecting path of sensor assembly is provided.The the 1st and the 2nd pin of double contact pin is respectively power supply+3V and GND, is connected with power supply unit 3V output, and the 3-5 pin is SPI digital interface signal pins, and SPI interface signal SCLK, the DOUT of baroceptor and microcontroller and the connecting path of DIN are provided.
In order to guarantee under normal temperature is measured and barometric surveying accuracy during in temperature variation, need to carry out absolute error correction correction and temperature compensation correction to measurement result.Correction is carried out according to experimental result, at first baroceptor is carried out FR normal temperature transformation and normal pressure temperature variation testing, test result is carried out data analysis, study its linear and discreteness distribution, by using least square method to calculate a fair curve, with its input microcontroller, enroll in the program.In measuring process, utilize this curve that the data that obtain are done corresponding the correction, finally obtain accurately measurement result.
Concrete modification method is as follows:
(1) air pressure absolute error correction
Because baroceptor has higher long-time stability, under the steady temperature condition, the measurement absolute error of different pressures scope substantially can be used as droop and processes, thus the modification method of absolute error just directly the using formula following formula finish.
P=P
t-Δ
P..............................................(1)
Following formula P represents actual pressure value, P
tRepresent this atmospheric pressure measurement measurement device atmospheric pressure value, Δ
pRepresent absolute error.Specific practice is, air pressure measuring apparatus to be measured is put into altichamber, according to the measurement point of choosing, changes altichamber atmospheric pressure value is set, wait quantity to be measured stable after P and Δ in the record air pressure measuring apparatus different measuring point
p, then calculate according to following formula and revise rear barometric surveying value.
(2) temperature compensation of air pressure
It is very large that baroceptor measurement performance in this atmospheric pressure measurement device is affected by temperature conditions, by device is tested, in temperature variation, obtain the output of air pressure measuring apparatus, after these measurement results employing least square curve method matches, obtain the eigenwert of curve, and these parameters are enrolled in the program, the measuring error that Yin Wendu causes is revised.After measurement mechanism is through normal temperature measuring error and the correction of temperature variation measuring error, export accurately atmospheric pressure measurement value by signal cable to the barometric information collector.
But volume is little, precision is high, output digitizing, the bus networking of user's self calibration and intelligentized characteristics but the intelligent atmospheric pressure measurement device that the utility model relates to has, and can satisfy ground Meteorological Observation System and naval vessel for the demand of unmanned air pressure Continuous Observation.
Description of drawings
Fig. 1 is the intelligent atmospheric pressure measurement apparatus structure schematic diagram that the utility model relates to;
Fig. 2 is sensor assembly and the data acquisition circuit plate circuit block diagram that the utility model relates to;
Fig. 3 is that the intelligent atmospheric pressure measurement device bus networking that the utility model relates to arranges schematic diagram.
Description of symbols in the accompanying drawing:
1, sensor assembly 2, double contact pin
3, active crystal oscillator 4, data acquisition circuit plate
5, mounting base 6, connection terminal
7, Pneumatic quick connector 8, impulse conduit
9, baroceptor 10, housing
Embodiment
By reference to the accompanying drawings the technical solution of the utility model is further specified.Fig. 1 shows basic structure of the present utility model, and Fig. 2 shows the circuit structure of sensor assembly of the present utility model and data acquisition circuit plate, and Fig. 3 shows that the networking of the utility model bus arranges situation.
As shown in the figure, the intelligent atmospheric pressure measurement device that relates to of the utility model comprises housing 10, mounting base 5, sensor assembly 1, data acquisition circuit plate 4, impulse conduit 8.
Data acquisition circuit plate 4 is arranged in the housing 10 and adopts φ 3mm screw to be fixed on the bottom, comprises microcontroller, power supply unit, data interface unit, geocoding unit.Microcontroller adopts 8 enhancement mode microcontrollers, it is the core of Acquisition Circuit, be responsible for the operation and control of intelligent atmospheric pressure measurement device, gather the Output rusults of front end baroceptor, finish the calculating of data-switching and quantities, realize the linear compensation of measurement result and the processing of abnormal results, the groundworks such as order that the output of tissue sampling data and response host computer are sent.
Power supply unit adopts the secondary power supply Managed Solution to be responsible for the power supply of input is carried out conversion, the first order adopts the switching power source chip of 5V output, its 5V output connects the input of the linear LDO chip in the second level, be transformed into+3V voltage by the LDO chip, output is connected to the power supply input pin of microcontroller, sensor assembly 1, data interface unit again.Data acquisition circuit data interface unit chief component is chip MAX3485, and it is responsible for finishing output data level translation function, and namely the serial Transistor-Transistor Logic level by the UART output of microcontroller converts difference RS-485 level to.The input of MAX3485 is connected to the UART0 of microcontroller, and namely the 29th of microcontroller the and the 30th pin is exported connection connection terminal 6.
The geocoding unit is used for arranging the geocoding of sensor self, adopts 6 toggle switchs to realize, the geocoding unit is 64, and namely available address realm is 0-63.Coding unit adopts toggle switch to be connected to 6 I/O mouth P1.0-P1.5 of microcontroller by pull-up resistor.Measurement mechanism receives the query statement that comprises the measurement mechanism address that the barometric information collector is sent in when work, and command address is compared with the address of self geocoding unit, sends the atmospheric pressure value measurement result to the barometric information collector after consistent.
During practical application, intelligent atmospheric pressure measurement device can be installed in a plurality of places.As shown in Figure 3, each intelligent pressure measurement mechanism is articulated on the RS-485 bus.The barometric information collector gathers the atmospheric pressure value of each intelligent pressure measurement mechanism site by the RS-485 bus time-sharing.
Claims (4)
1. an intelligent atmospheric pressure measurement device is characterized in that: comprise housing, mounting base, sensor assembly, data acquisition circuit plate, impulse conduit, Pneumatic quick connector; Mounting base is fixed on housing bottom, and sensor assembly, data acquisition circuit plate and impulse conduit are arranged in the housing; Data acquisition circuit plate stationary housing is inner; Sensor assembly is welded on the data acquisition circuit plate by double contact pin; The lateral opening hole of housing is installed connection terminal; The data acquisition circuit plate comprises microcontroller, power supply unit, data interface unit, geocoding unit; Sensor assembly comprises baroceptor and active crystal oscillator, and they directly are welded on the sensor assembly, and baroceptor adopts intelligent integrated baroceptor MS5534C, with the interface mode of microcontroller be the SPI digital interface; Impulse conduit one end connects baroceptor, and the other end connects the Pneumatic quick connector that is arranged on the housing side; Power supply unit output is connected to the power supply input pin of microcontroller, sensor assembly, data interface unit; Microcontroller adopts 8 enhancement mode microcontrollers; The data interface unit input end connects microcontroller; The geocoding unit connects the I/O mouth of microcontroller.
2. intelligent atmospheric pressure measurement device according to claim 1, it is characterized in that: Pneumatic quick connector is fixed on the housing side after passing cast aluminium alloy shell round tube hole; The stainless steel protection cover of the baroceptor of impulse conduit one end connecting sensor module, an end connects the Pneumatic quick connector of housing side.
3. intelligent atmospheric pressure measurement device according to claim 1 is characterized in that, the required clock of sensor assembly is provided by the active crystal oscillator of 32.768kHz, and the major clock that its 3rd pin output is connected to baroceptor is inputted the 5th pin MCLK.
4. intelligent atmospheric pressure measurement device according to claim 1, it is characterized in that, the lateral opening hole of described housing is installed connection terminal, but connection terminal is the connection terminal of AKZ1700-3.81 type 5 core plugs, signal conductor one end spins with this connection terminal after by the European pressure line terminal crimping of insulating, and the other end is plugged into mutually with the external pressure data acquisition unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220401418.XU CN202710233U (en) | 2012-08-13 | 2012-08-13 | Intelligent atmospheric pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220401418.XU CN202710233U (en) | 2012-08-13 | 2012-08-13 | Intelligent atmospheric pressure measuring device |
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| Publication Number | Publication Date |
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| CN202710233U true CN202710233U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201220401418.XU Withdrawn - After Issue CN202710233U (en) | 2012-08-13 | 2012-08-13 | Intelligent atmospheric pressure measuring device |
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| CN (1) | CN202710233U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798497A (en) * | 2012-08-13 | 2012-11-28 | 国家海洋技术中心 | Intelligent atmospheric pressure measuring device |
-
2012
- 2012-08-13 CN CN201220401418.XU patent/CN202710233U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798497A (en) * | 2012-08-13 | 2012-11-28 | 国家海洋技术中心 | Intelligent atmospheric pressure measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20140319 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20140319 |