CN109458986A - A kind of height above sea level metering device - Google Patents

A kind of height above sea level metering device Download PDF

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Publication number
CN109458986A
CN109458986A CN201811340041.XA CN201811340041A CN109458986A CN 109458986 A CN109458986 A CN 109458986A CN 201811340041 A CN201811340041 A CN 201811340041A CN 109458986 A CN109458986 A CN 109458986A
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China
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signal
air pressure
sea level
digital
height above
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CN201811340041.XA
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Chinese (zh)
Inventor
吴基玄
吴平
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Wenzhou University
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Individual
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Priority to CN201811340041.XA priority Critical patent/CN109458986A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • G01C5/06Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels by using barometric means

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

The present invention provides a kind of height above sea level metering device, including signal processing unit, and the baroceptor and display unit that are connected with signal processing unit;Baroceptor acquires current gas pressure and Current Temperatures, the air pressure signal and temperature signal simulated, and digital air pressure acquisition signal and digital temperature acquisition signal after analog-to-digital conversion, filtering and correction process, after being corrected;Signal processing unit receives the temperature acquisition signal after correction and digital air pressure acquisition signal, and the digital air pressure acquisition signal after received correction is calculated according to preset height above sea level algorithm, height above sea level is obtained, and further will be pushed to display unit from the temperature value extracted in the temperature acquisition signal after received correction, the atmospheric pressure value extracted from the digital air pressure acquisition signal after received correction and the height above sea level being calculated and show.Implement the present invention, precision is high, at low cost, small in size easy to carry.

Description

A kind of height above sea level metering device
Technical field
The present invention relates to height measurement technique field more particularly to a kind of height above sea level metering devices.
Background technique
With the development of science and technology, status of the height above sea level metering device in agricultural, industry is also continuously improved therewith.From perhaps The importance of height above sea level metering device can be seen in we in many cases.In agricultural production, the height change of height above sea level can be right The kinds of crops constitutes significant impact, and in the high altitude localities based on mountainous region, height above sea level is higher, at the same air pressure also can with low, Atmospheric density is small, and this environment is highly detrimental to the plantation of crops;And in some open low altitude areas, proper temperature, And oxygen content is big, is suitble to the growth of the crops such as rice, sorghum.In the industrial production, it can be obtained according to data, metal smelt is melted Point can be reduced with the increase of height, therefore select the regional metal smelt of matters height above sea level with regard to particularly important.
Currently, there are two types of common height above sea level metering devices: (1) traditional mechanical height above sea level metering device, it should Often volume is larger for metering device, and the precision of measurement result is low, cannot fully meet daily demand;(2) global location is relied on The height above sea level metering device of system GPS, the metering device involve great expense, and development cost is high, and internal circuit configuration is extremely multiple It is miscellaneous, it is easy that there are biggish interference, can also there is measurement not enough accurately defect.
Therefore, a kind of height above sea level metering device is needed, precision is high, at low cost, small in size easy to carry.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that provide a kind of height above sea level metering device, precision is high, at This is low, small in size easy to carry.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of height above sea level metering devices, including signal Processing unit, and the baroceptor and display unit that are connected with the signal processing unit;Wherein,
The baroceptor, for acquiring current gas pressure and Current Temperatures, air pressure signal and the temperature letter simulated Number, and after air pressure signal to the simulation and temperature signal carry out analog-to-digital conversion and filtration treatment, obtain filtered number Word air pressure acquisition signal and digital temperature acquisition signal, and further to the filtered digital air pressure acquisition signal and number Temperature acquisition signal is corrected;
The signal processing unit, for receiving the temperature acquisition signal after the baroceptor corrects and digital air pressure Signal is acquired, and the digital air pressure acquisition signal after received correction is counted according to preset height above sea level algorithm It calculates, obtains height above sea level, and further by the temperature value extracted from the temperature acquisition signal after received correction, from institute The atmospheric pressure value extracted and the height above sea level being calculated are pushed to institute in digital air pressure acquisition signal after the correction received Display unit is stated to show;
The display unit, for showing that the signal processing unit pushes the temperature value, atmospheric pressure value and the height above sea level that come Highly.
Wherein, the baroceptor includes the air pressure sequentially connected and temperature sampling circuit, analog-digital converter, filter And correcting circuit;Wherein,
The air pressure and temperature sampling circuit, for acquiring current gas pressure and Current Temperatures in real time.Form the air pressure of simulation Signal and temperature signal;
The analog-digital converter, for the simulation air pressure signal and temperature signal carry out analog-to-digital conversion, obtain Digital air pressure acquisition signal and digital temperature acquisition signal;
The filter, for the digital air pressure acquisition signal and the digital temperature acquisition signal to be filtered, Obtain filtered digital air pressure acquisition signal and digital temperature acquisition signal;
The correcting circuit also with the signal processing unit, for will it is described it is filtered number air pressure acquisition signal and After digital temperature acquisition signal is corrected, it is sent to the signal processing unit.
Wherein, the model BMP085 that the baroceptor uses.
Wherein, the signal processing unit is single-chip microcontroller, the model STC89C52 of the single-chip microcontroller.
Wherein, preset height above sea level algorithm is in the single-chip microcontroller Wherein, Altitude indicates the value of height above sea level, unit m;P indicates the gas extracted in the digital air pressure acquisition signal after correction Pressure value;p0Indicate the value of standard atmospheric pressure.
Wherein, the display unit is display screen, the model LCD12864 of the display screen.
The implementation of the embodiments of the present invention has the following beneficial effects:
Baroceptor, signal processing unit and display unit in the present invention are all made of Modular Structure Design, so that Entire metering device has many advantages, such as small in size easy to carry, at low cost;Simultaneously as baroceptor has filtering, correction Etc. functions so that signal processing unit obtains and the data precision of processing is high, so that the precision of the final data of output is higher.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention, for those of ordinary skill in the art, without any creative labor, according to These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is the system structure diagram of height above sea level metering device provided in an embodiment of the present invention;
Fig. 2 is the system structure diagram of baroceptor in Fig. 1.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing Step ground detailed description.
It as depicted in figs. 1 and 2, is a kind of height above sea level metering device provided in the embodiment of the present invention, including at signal Manage unit 1, and the baroceptor 2 and display unit 3 that are connected with signal processing unit 1;Wherein,
Baroceptor 2, for acquiring current gas pressure and Current Temperatures, the air pressure signal and temperature signal simulated, And after air pressure signal to simulation and temperature signal carry out analog-to-digital conversion and filtration treatment, obtains filtered digital air pressure and adopt Collect signal and digital temperature acquisition signal, and further to filtered digital air pressure acquisition signal and digital temperature acquisition signal It is corrected;
Signal processing unit 1, for receiving the temperature acquisition signal after baroceptor 2 corrects and digital air pressure acquisition letter Number, and the digital air pressure acquisition signal after received correction is calculated according to preset height above sea level algorithm, it obtains Height above sea level, and further by the temperature value extracted from the temperature acquisition signal after received correction, from received Correction after digital air pressure acquisition signal in the atmospheric pressure value extracted and the height above sea level being calculated be pushed to display unit 3 Display;
Display unit 3, for showing that signal processing unit 2 pushes the temperature value, atmospheric pressure value and the height above sea level that come.
In embodiments of the present invention, baroceptor 2 includes that the air pressure sequentially connected and temperature sampling circuit 21, modulus turn Parallel operation 22, filter 23 and correcting circuit 24;Wherein,
Air pressure and temperature sampling circuit 21, for acquiring current gas pressure and Current Temperatures in real time.Form the air pressure letter of simulation Number and temperature signal;
Analog-digital converter 22, for simulation air pressure signal and temperature signal carry out analog-to-digital conversion, obtain digital gas Pressure acquisition signal and digital temperature acquisition signal;
Filter 23 is obtained for digital air pressure acquisition signal and the digital temperature acquisition signal to be filtered Digital air pressure acquisition signal and digital temperature acquisition signal after filter;
Correcting circuit 24 also with signal processing unit 1, is used for filtered digital air pressure acquisition signal and digital temperature After acquisition signal is corrected, it is sent to signal processing unit 1.
In one embodiment, the model BMP085 that baroceptor 2 uses;Signal processing unit 1 is single-chip microcontroller, should The model STC89C52 of single-chip microcontroller, and preset height above sea level algorithm is in the single-chip microcontroller
Wherein, Altitude indicates the value of height above sea level, unit m;P table The atmospheric pressure value extracted in digital air pressure acquisition signal after showing correction;p0Indicate the value of standard atmospheric pressure;, display unit 3 is aobvious Display screen, the model LCD12864 of the display screen.
BMP085 is a baroceptor for being very suitable for being used in MOVING STRUCTURE, its low energy consumption, high-precision, function The strong and power consumption of property is extremely low.And it can be easily connected with single-chip microcontroller by I2C, realize the transmission of data.Basic parameter is such as Under: (containing temperature output, temperature-compensating, I2C interface)
Pressure limit: 300-1100hPa (9000 meters of height above sea level ... -500 meters)
Supply voltage: 1.8V-3.6V (VDDA)
1.62V-3.6V(VDDD)
LCC8 encapsulation: lead-free ceramics carrier encapsulation (LCC)
Size: 5.0mm*5.0mm*1.2mm
Low-power consumption: 5 μ A under mode standard
In high precision: under low-power consumption mode, resolution ratio is about 0.06hPa (0.5 meter)
Under high power consumption mode, resolution ratio is about 0.03hPa (0.25 meter)
Reaction time: 7.5ms
Standby current: 0.1 μ A
Daily use: 1.GPS precision navigation (dead reckoning etc.) 2. fan powers control the navigation of 3. indoor and outdoor
4. sport, medical treatment & health etc. monitor the instruction of 5. weather forecast, 6. vertical speed.
The inside of STC89C52 single chip uses MCS-51, is but different from other 51 single-chip microcontrollers, compare under it It consumes energy smaller, but stability is higher, internal integrated memory, him is made to show one's talent in numerous 51 single-chip microcontrollers.With with subscript Quasi- function: 1,512 byte RAM;2,32 I/O mouth lines;3, the Flash of 8k byte;4, WatchDog Timer;5,4KB EEPROM;6,3 16 timer/counters;7,4 external interrupts;8, the interrupt structure of 14 grades of 7 vector;9, Quan Shuan The serial port of work;10,0Hz static logic operates;11,2 kinds of softwares are supported.
Since atmospheric pressure can occur significantly to change with the variation of height above sea level, the design of barometertic altimeter is also It is that this point is utilized.When the numerical value of height above sea level is 0~+4000M, air pressure can be followed by the reduction of height above sea level and rise.Its ratio About, the every reduction 1m of height above sea level, atmospheric pressure about rise 12Pa.Around this principle, can by the acquisition to air pressure, Collected data are subjected to processing to obtain the value of height above sea level.The value approximation of atmospheric pressure is considered as, the ground at place Table height above sea level to the entire air column of atmosphere quality, height be 0~+3000 meters when, it is every reduce 1m height, air pressure About enhance 12pa;When height is 0~+2000 meters, every height for reducing 1m, air pressure about enhances 11pa, according to this original Reason, local height above sea level can be obtained by collected air pressure and standard atmospheric pressure, obtains above-mentioned preset height above sea level Algorithm.
LCD12864 display screen is the liquid crystal display of dot matrix class.Because the module interface mode is convenient, program is controlled also more Simply, it is possible to more easily form graphical interfaces.It only needs to correspond to allow screen image or a Chinese character occur Lattice information be input in corresponding memory.The information of the dot matrix inputted is both needed to be independently arranged, at this time liquid crystal Respectively show the corresponding relationship between position and address a little just at the key of problem on screen.And the liquid crystal display and same type Product is more cheap compared to cost, and the program of design and the display of hardware circuit is also more simple.
The implementation of the embodiments of the present invention has the following beneficial effects:
Baroceptor, signal processing unit and display unit in the present invention are all made of Modular Structure Design, so that Entire metering device has many advantages, such as small in size easy to carry, at low cost;Simultaneously as baroceptor has filtering, correction Etc. functions so that signal processing unit obtains and the data precision of processing is high, so that the precision of the final data of output is higher.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.

Claims (6)

1. a kind of height above sea level metering device, which is characterized in that including signal processing unit, and with the signal processing unit Connected baroceptor and display unit;Wherein,
The baroceptor, for acquiring current gas pressure and Current Temperatures, the air pressure signal and temperature signal simulated, and After air pressure signal and temperature signal to the simulation carry out analog-to-digital conversion and filtration treatment, filtered digital air pressure is obtained Signal and digital temperature acquisition signal are acquired, and further the filtered digital air pressure acquisition signal and digital temperature are adopted Collection signal is corrected;
The signal processing unit, for receiving the temperature acquisition signal after the baroceptor corrects and digital air pressure acquisition Signal, and the digital air pressure acquisition signal after received correction is calculated according to preset height above sea level algorithm, it obtains To height above sea level, and further by the temperature value extracted from the temperature acquisition signal after received correction, from being received To correction after digital air pressure acquisition signal in the atmospheric pressure value that extracts and the height above sea level being calculated be pushed to it is described aobvious Show that unit is shown;
The display unit, for showing that the signal processing unit pushes the temperature value, atmospheric pressure value and the height above sea level that come.
2. height above sea level metering device as described in claim 1, which is characterized in that the baroceptor includes sequentially connecting Air pressure and temperature sampling circuit, analog-digital converter, filter and correcting circuit;Wherein,
The air pressure and temperature sampling circuit form the air pressure signal of simulation for acquiring current gas pressure and Current Temperatures in real time And temperature signal;
The analog-digital converter, for the simulation air pressure signal and temperature signal carry out analog-to-digital conversion, obtain number Air pressure acquisition signal and digital temperature acquisition signal;
The filter is obtained for the digital air pressure acquisition signal and the digital temperature acquisition signal to be filtered Filtered number air pressure acquisition signal and digital temperature acquisition signal;
The correcting circuit also with the signal processing unit, is used for the filtered digital air pressure acquisition signal and number After temperature acquisition signal is corrected, it is sent to the signal processing unit.
3. height above sea level metering device as claimed in claim 2, which is characterized in that the model that the baroceptor uses BMP085。
4. height above sea level metering device as described in claim 1, which is characterized in that the signal processing unit is single-chip microcontroller, The model STC89C52 of the single-chip microcontroller.
5. height above sea level metering device as claimed in claim 4, which is characterized in that preset height above sea level in the single-chip microcontroller Algorithm isWherein, Altitude indicates the value of height above sea level, unit m;p The atmospheric pressure value extracted in digital air pressure acquisition signal after indicating correction;p0Indicate the value of standard atmospheric pressure.
6. height above sea level metering device as described in claim 1, which is characterized in that the display unit is display screen, described The model LCD12864 of display screen.
CN201811340041.XA 2018-11-12 2018-11-12 A kind of height above sea level metering device Pending CN109458986A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108254A (en) * 2019-04-30 2019-08-09 大器物联科技(广州)有限公司 A method of based on air pressure accurate height measuring, vertical movement speed and vertical movement distance
CN117870619A (en) * 2024-03-12 2024-04-12 云奕智创航空科技(南通)有限公司 Air pressure height detection device and unmanned aerial vehicle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070262319A1 (en) * 2003-06-20 2007-11-15 Hitachi Displays, Ltd. LCD with first and second circuit regions each with separately optimized transistor properties
CN101379367A (en) * 2006-03-20 2009-03-04 高通股份有限公司 Method and apparatus for determining the altitude of a mobile device
CN201699821U (en) * 2010-06-24 2011-01-05 天津三星光电子有限公司 Digital camera with function of measuring air pressure and elevation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070262319A1 (en) * 2003-06-20 2007-11-15 Hitachi Displays, Ltd. LCD with first and second circuit regions each with separately optimized transistor properties
CN101379367A (en) * 2006-03-20 2009-03-04 高通股份有限公司 Method and apparatus for determining the altitude of a mobile device
CN201699821U (en) * 2010-06-24 2011-01-05 天津三星光电子有限公司 Digital camera with function of measuring air pressure and elevation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108254A (en) * 2019-04-30 2019-08-09 大器物联科技(广州)有限公司 A method of based on air pressure accurate height measuring, vertical movement speed and vertical movement distance
CN117870619A (en) * 2024-03-12 2024-04-12 云奕智创航空科技(南通)有限公司 Air pressure height detection device and unmanned aerial vehicle
CN117870619B (en) * 2024-03-12 2024-05-24 云奕智创航空科技(南通)有限公司 Air pressure height detection device and unmanned aerial vehicle

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Inventor after: Zheng Yinyan

Inventor after: Wu Ping

Inventor after: Jin Chenxin

Inventor after: Wu Jixuan

Inventor before: Wu Jixuan

Inventor before: Wu Ping

TA01 Transfer of patent application right
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Effective date of registration: 20200914

Address after: 325000 Zhejiang, Ouhai, South East Road, No. 38, Wenzhou National University Science Park Incubator

Applicant after: Wenzhou University

Address before: 325000 Wenrui Avenue 999 Huarun Yuefu 902, Ouhai District, Wenzhou City, Zhejiang Province

Applicant before: Wu Jixuan

RJ01 Rejection of invention patent application after publication
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Application publication date: 20190312