CN110388897A - A kind of wide warm high-precision tilt angle sensor and its precision compensation method - Google Patents
A kind of wide warm high-precision tilt angle sensor and its precision compensation method Download PDFInfo
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- CN110388897A CN110388897A CN201810381929.1A CN201810381929A CN110388897A CN 110388897 A CN110388897 A CN 110388897A CN 201810381929 A CN201810381929 A CN 201810381929A CN 110388897 A CN110388897 A CN 110388897A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Manufacturing & Machinery (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The invention patent provides a kind of wide warm high-precision tilt angle sensor and its precision compensation method.Obliquity sensor includes DC-DC power module, microprocessor, the inclination angle MEMS measurement module, DAC chip and communication module.Wherein, DC-DC power module includes filter circuit, power module of voltage regulation and reference power supply module, microprocessor includes SPI subsystem, ADC subsystem and adjustment in accuracy module, the inclination angle MEMS measurement module output angle voltage signal is to ADC subsystem, temperature digital signal is provided simultaneously to SPI subsystem, by being supplied to adjustment in accuracy module after its processing.Angle voltage signal is converted to angle digital signal by ADC subsystem in microprocessor, and it is provided to adjustment in accuracy module, accuracy compensation is carried out according to temperature by it, compensated angle signal is supplied to communication module and DAC chip by microprocessor simultaneously, the former is exported with digital signal form, and the latter exports as an electrical current.Angle compensation technology used by accuracy compensation module compensates for complicated temperature drift compensation process in existing similar technique, the digital signal of output and the defect of current signal consistency difference.The invention patent has the advantages that operating temperature range is wide, measurement accuracy is high, is suitable for batch production.
Description
Technical field
The invention patent belongs to obliquity sensor technical field, specifically a kind of wide warm high-precision tilt angle sensor and its essence
Spend compensation method.
Background technique
Obliquity sensor is a kind of sensor that can convert level inclination to electric signal, is widely used in carrier rocket
The vehicles inclination angle detection such as rocket body verticality adjustment detection and missile truck, radar truck uses.Because its prolonged application is disliked in environment
Bad occasion, thus it is very high to its reliability and environmental adaptability requirement.Traditional liquid pendulum, solid pendulum and MEMS device exist by
Temperature influences the defects of big, and is influenced by component precision itself, and Product Precision is low.
Precision compensation method mentioned in existing literature, precision is undesirable or algorithm is excessively complicated after there is compensation
It is unfavorable for the defect of engineer application.
Summary of the invention
To overcome above-mentioned deficiency, the invention patent provides a kind of wide warm high-precision tilt angle sensor and its accuracy compensation side
Method can be used for compensating obliquity sensor because precision drift caused by temperature change and amendment component precision influence itself cause
The low problem of measurement accuracy improves precision index of the product under wide operating temperature range.
The invention patent provides a kind of wide warm high-precision tilt angle sensor and its precision compensation method, includes DC-DC electricity
Source module, microprocessor, the inclination angle MEMS measurement module, DAC chip and communication module；DC-DC power module include filter circuit,
Power module of voltage regulation and reference power supply module；Microprocessor includes SPI subsystem, ADC subsystem and adjustment in accuracy module.Filtering
Circuit input end is connected with external input power, and output end is connected with power module of voltage regulation input terminal；Reference power supply module, Wei Chu
The power input of reason device, communication module and DAC chip is connected with output end of stabilized voltage supply；The inclination angle MEMS measurement module power supply
Input terminal connects benchmark power module power output end；The angle signal output end of the inclination angle MEMS measurement module is connected to micro process
The signal input part of device ADC subsystem, temperature signal output end are connected to the signal input part of microprocessor SPI subsystem, ADC
The signal output end of subsystem and SPI subsystem is connected to the signal input part of adjustment in accuracy module, adjustment in accuracy module
Signal output end is connected to communication module and DAC chip signal input part, the former is exported with digital signal form, and the latter is with electric current
Signal form output.
Further, the warm high-precision tilt angle sensor measurement of the width is axially X-axis and Y-axis, operating temperature range-
40 DEG C~+60 DEG C.
Further, the microprocessor model is C8051F060.
Further, the DAC chip model AD5422BREZ uses 2 altogether, respectively corresponds X-axis and Y-axis, and
Microprocessor is connected to by the way of daisy chain.
Further, the precision compensation method of the warm high-precision tilt angle sensor of the width, including correction of temperature drift method
And linear correction method.
Further, the correction of temperature drift method the technical solution adopted is that: operating temperature range is divided into k sections, k
For positive integer, each point corresponding temperature is T0~Tk, it is ErrorT that each point, which corresponds to temperature drift value,0~ErrorTk.Using secondary difference point
Section backoff algorithm compensates temperature drift error, and algorithm model is as follows:
Wherein, each variable-definition is as follows:
Angle: output angle after compensation；
Angle ': angle before compensating；
T: current observed temperature value；
Further, the linear correction method the technical solution adopted is that: using linear segmented revised law to member
Device itself error is modified.Test angle range is divided into m sections by the algorithm, and m is positive integer, and every segment limit is 5000, respectively
Point corresponding angle is S0~Sm, sample the measured value D in each waypoint0~Dm, algorithm model is as follows:
Wherein, each variable-definition is as follows:
Angle: revised angle；
Angle ': the angle before amendment；
The beneficial effect of the invention patent is to guarantee sensor in wide operating temperature range, and measurement accuracy remains
In higher level, precision index of the sensor under wide operating temperature, while the accuracy compensation side used is greatly improved
Method has the characteristics that compensation process is simple, compensation precision is high, and being fully able to meet the military equipments such as missile truck, radar truck makes
With demand, while being suitable for batch production, compensates for that current obliquity sensor temperature drift is big, adjustment in accuracy process is complicated, amendment week
The defect of phase factory.
Detailed description of the invention
Fig. 1 is the composition block diagram of the invention patent
Fig. 2 is the software flow block diagram of the invention patent
Fig. 3 is the correction of temperature drift process schematic of the invention patent
Fig. 4 is the linear makeover process schematic diagram of the invention patent
Specific embodiment
According to Fig. 2~Fig. 4 process, each step operation is further described:
The first step is divided into k sections according to obliquity sensor operating temperature range, and confirmation needs to carry out the temperature of temperature drift compensation
Point T0~Tk.Obliquity sensor is placed in different temperature points and is powered on, T is recorded0~TkCorresponding temperature drift value ErrorT0~
ErrorTk.Substitution formula (1), can be completed correction of temperature drift process.
Second step is divided into m sections according to obliquity sensor measurement range, and confirms that each point corresponding angle is S0~Sm.By product
It is placed in each angle points, measured value D of the test product in each waypoint0~Dm, substitute into formula (2), can be completed and linearly corrected
Journey.
Claims (7)
1. a kind of wide warm high-precision tilt angle sensor and its precision compensation method, which is characterized in that comprising DC-DC power module,
Microprocessor, the inclination angle MEMS measurement module, DAC chip and communication module；
The DC-DC power module includes filter circuit, power module of voltage regulation and reference power supply module；
The microprocessor includes SPI subsystem, ADC subsystem and adjustment in accuracy module；
The filter circuit input terminal is connected with external input power, and output end is connected with power module of voltage regulation input terminal；Benchmark
Power module, microprocessor, communication module and DAC chip power input be connected with output end of stabilized voltage supply；MEMS inclines
Angular measurement modular power source input terminal connects benchmark power module power output end；
The angle signal output end of the inclination angle MEMS measurement module is connected to the signal input part of microprocessor ADC subsystem,
Temperature signal output end is connected to the signal input part of microprocessor SPI subsystem, the signal of ADC subsystem and SPI subsystem
Output end is connected to the signal input part of adjustment in accuracy module, and the signal output end of adjustment in accuracy module is connected to communication module
With DAC chip signal input part, the former is exported with digital signal form, and the latter is exported in the form of current signal.
2. wide warm high-precision tilt angle sensor as described in claim 1, it is characterised in that: axial product measurement is X-axis and Y
Axis, -40 DEG C~+60 DEG C of operating temperature range.
3. high-precision tilt angle sensor as described in claim 1 wide warm, it is characterised in that: the microprocessor model is
C8051F060。
4. wide warm high-precision tilt angle sensor as described in claim 1, it is characterised in that: the DAC chip model
AD5422BREZ is used 2 altogether, respectively corresponds X-axis and Y-axis, and be connected to microprocessor by the way of daisy chain.
5. the precision compensation method of wide warm high-precision tilt angle sensor as described in claim 1, it is characterised in that: including temperature drift
Modification method and linear correction method.
6. correction of temperature drift method as claimed in claim 5, it is characterised in that: operating temperature range is divided into k sections, k is positive whole
Number, each point corresponding temperature are T0~Tk, it is ErrorT that each point, which corresponds to temperature drift value,0~ErrorTk.Software is segmented using secondary difference
Backoff algorithm carries out correction of temperature drift to temperature drift error, and algorithm model is as follows:
Wherein, each variable-definition is as follows:
Angle: output angle after compensation；
Angle ': angle before compensating；
T: current observed temperature value.
7. linear correction method as claimed in claim 5, it is characterised in that: software is using segmentation revised law to component itself
Error is linearly corrected.Test angle range is divided into m sections by the algorithm, and m is positive integer, and every segment limit is 5000, each point pair
Answering angle is S0~Sm samples the measured value D in each waypoint0~Dm, algorithm model are as follows:
Wherein, each variable-definition is as follows:
Angle: revised angle；
Angle ': the angle before amendment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381929.1A CN110388897A (en) | 2018-04-19 | 2018-04-19 | A kind of wide warm high-precision tilt angle sensor and its precision compensation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381929.1A CN110388897A (en) | 2018-04-19 | 2018-04-19 | A kind of wide warm high-precision tilt angle sensor and its precision compensation method |
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| Publication Number | Publication Date |
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| CN110388897A true CN110388897A (en) | 2019-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810381929.1A Pending CN110388897A (en) | 2018-04-19 | 2018-04-19 | A kind of wide warm high-precision tilt angle sensor and its precision compensation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470194A (en) * | 2023-12-28 | 2024-01-30 | 江西飞尚科技有限公司 | Inclination angle measurement method, inclination angle measurement system, storage medium and computer |
-
2018
- 2018-04-19 CN CN201810381929.1A patent/CN110388897A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470194A (en) * | 2023-12-28 | 2024-01-30 | 江西飞尚科技有限公司 | Inclination angle measurement method, inclination angle measurement system, storage medium and computer |
| CN117470194B (en) * | 2023-12-28 | 2024-04-09 | 江西飞尚科技有限公司 | Inclination angle measurement method, inclination angle measurement system, storage medium and computer |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191029 |