CN115575032A - Digital pressure sensor compensation method based on ejection seat program controller - Google Patents
Digital pressure sensor compensation method based on ejection seat program controller Download PDFInfo
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- CN115575032A CN115575032A CN202211319262.5A CN202211319262A CN115575032A CN 115575032 A CN115575032 A CN 115575032A CN 202211319262 A CN202211319262 A CN 202211319262A CN 115575032 A CN115575032 A CN 115575032A
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- 238000011088 calibration curve Methods 0.000 claims abstract description 19
- 238000004590 computer program Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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Abstract
The invention discloses a digital pressure sensor compensation method based on an ejection seat program controller, which comprises the following steps: uniformly selecting a plurality of temperature points in the working range of the temperature sensor, calibrating the pressure P and the output voltage V at each temperature point to obtain a calibration curve g of the pressure P relative to the output voltage V n And a calibration curve F with respect to temperature T, pressure P and output voltage V; real-time acquisition of output voltage V of temperature sensor 0 And temperature T 0 And calculating a curve g of the pressure and the output voltage at the moment according to a calibration curve F of the temperature T, the pressure P and the output voltage V 0 (ii) a According to g 0 Calculating to obtain the current pressure value P 0 As an output value after compensation. According to the invention, temperature compensation is realized in the sensor, and in the process of later-stage maintenance of the ejection seat program controller sensor, the software of the program controller is not required to be changed and directly replaced, so that the compatibility and operability of the system are improved, and the workload is reduced.
Description
Technical Field
The invention belongs to the technical field of digital pressure sensor compensation, and particularly relates to a digital pressure sensor compensation method based on an ejection seat program controller.
Background
The ejection seat program controller sensor is an important part for sensing environmental parameters of the ejection seat program controller, and has the functions of sensing the total pressure value of an aircraft airspeed system or a chair-mounted airspeed system and the static pressure value of the height of the ejected seat system, converting the total pressure value into an electric signal and inputting the electric signal into a microcomputer of the seat program controller for processing. At present, a sensor used on a domestic ejection seat program controller adopts a temperature drift suppression constant current excitation technology to compensate the change of excitation current caused by temperature change, so that the influence of temperature on the output of the sensor is reduced, but the compensation of the mode on the output of a pressure sensor is very limited, and the influence of the temperature cannot be eliminated.
Disclosure of Invention
The invention aims to provide a digital pressure sensor compensation method based on an ejection seat program controller, which realizes temperature compensation in a sensor, does not need to change program controller software in the process of later maintenance of the ejection seat program controller sensor, directly replaces the program controller software, improves the compatibility and operability of a system and reduces the workload.
In order to solve the technical problems, the technical scheme of the invention is as follows: a digital pressure sensor compensation method based on an ejection seat program controller comprises the following steps:
arranging a pressure sensor, a temperature sensor, a voltage measuring device and a computer;
uniformly selecting a plurality of temperature points in the working range of the temperature sensor, calibrating the pressure P and the output voltage V at each temperature point to obtain a calibration curve g of the pressure P relative to the output voltage V n (P, V) and a calibration curve F (T, P, V) with respect to temperature T, pressure P and output voltage V;
real-time acquisition of output voltage V of temperature sensor 0 And temperature T 0 And calculating a curve g of the pressure and the output voltage at the moment according to the calibration curves F (T, P, V) of the temperature T, the pressure P and the output voltage V 0 (P，V)；
According to g 0 (P, V) calculating to obtain the current pressure value P 0 As an output value after compensation.
Calibration curve g of pressure P with respect to output voltage V n (P, V) are specifically:
V＝k n *P+b n
in the formula, k n At a temperature of T n Slope of the calibration curve under the conditions, b n At a temperature of T n The intercept of the curve is fixed under the condition.
Temperature T 0 Curve g of time pressure versus output voltage 0 (P, V) are specifically:
V＝k 0 *P+b 0
in the formula, k 0 Is a temperature T 0 The slope of the time scaling curve, b 0 Is a temperature T 0 Intercept of time calibration curve
When T is n-1 <T 0 <T n And | T n -T 0 |≥|T 0 -T n-1 In the case of the equation |,
when T is n-1 <T 0 <T n And | T n -T 0 |<|T 0 -T n-1 When |
In the formula, T n The temperature points selected when the curve was calibrated.
There is also provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method as claimed in any one of the above when executing the computer program.
There is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method according to any one of the preceding claims.
Compared with the prior art, the invention has the beneficial effects that:
according to the present invention, temperature compensation is performed in the microcomputer in a software manner according to the current temperature and the pressure-voltage curve calibrated at each temperature, so that the influence of the temperature on the pressure sensor is eliminated, and the output precision of the ejection seat program controller sensor is improved. Realize temperature compensation inside the sensor, in the later stage maintenance ejection seat program controller sensor process, need not to do any change to program controller software, direct replacement improves compatibility, the maneuverability of system, has reduced work load.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of a calibration curve F (T, P, V) with respect to temperature T, pressure P and output voltage V in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The technical problem to be solved by the invention is as follows: the digital pressure sensor compensation technology is adopted to sample output signals of a pressure sensitive device and a temperature sensor, and temperature compensation is carried out in a microcomputer in a software mode according to the current temperature and a pressure-voltage curve calibrated at each temperature, so that the influence of the temperature on the pressure sensor is eliminated, and the output precision of the ejection seat program controller sensor is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the digital pressure sensor compensation technology is applied to a sensor of a program controller of an ejection seat, and mainly comprises a pressure-sensitive device, a temperature sensor, a memory in which calibration curves of temperature T, pressure P and output voltage V are stored, a microcomputer and a communication bus. The schematic block diagram is shown in fig. 1.
The pressure-sensitive device and the temperature sensor are calibrated in advance, calibration data are stored in a memory, the current temperature and the output voltage of the pressure-sensitive device are collected, and a microcomputer carries out software compensation according to a calibration curve, so that the influence of the temperature on the pressure sensor is directly eliminated, and the output precision of the ejection seat program controller sensor is improved.
First, the pressure sensitive devices in the system are calibrated. Uniformly selecting a plurality of temperature points within the working temperature range of the sensor, calibrating the pressure P and the output voltage V at each temperature point to obtain a calibration curve g n (P，V)：
V＝k n *P+b n
A calibration curve F (T, P, V) of temperature T, pressure P and output voltage V is thus obtained, which is stored in a memory, as shown in fig. 2.
Then, the sensor collects the output voltage V of the pressure sensitive device and the temperature sensor in real time 0 According to V 0 Obtaining the current temperature T 0 Then from T 0 And the curve function F (T, P, V) in the memory can obtain the curve g between the pressure and the output voltage at the current temperature 0 (P，V)：
V＝k 0 *P+b 0
When T is n-1 <T 0 <T n And | T n -T 0 |≥|T 0 -T n-1 In the case of the equation |,
when T is n-1 <T 0 <T n And | T n -T 0 |<|T 0 -T n-1 In the case of the equation |,
at the known present voltage-sensitive device output voltage V 0 Under the condition (2), the current pressure value P can be obtained 0 As an output value after compensation.
Finally, to communicate with the ejection seat program controller, the current position is determinedPressure value P 0 And packaging according to a certain data format, and sending out at regular time through a communication bus.
The invention has the beneficial effects that: according to the current temperature and the pressure-voltage curve calibrated at each temperature, temperature compensation is carried out in a microcomputer in a software mode, so that the influence of the temperature on the pressure sensor is eliminated, and the output precision of the ejection seat program controller sensor is improved. Realize temperature compensation inside the sensor, in the later stage maintenance ejection seat program controller sensor process, need not to do any change to program controller software, direct replacement improves compatibility, the maneuverability of system, has reduced work load.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A digital pressure sensor compensation method based on an ejection seat program controller is characterized by comprising the following steps:
arranging a pressure sensor, a temperature sensor, a voltage measuring device and a computer;
uniformly selecting a plurality of temperature points in the working range of the temperature sensor, calibrating the pressure P and the output voltage V at each temperature point to obtain a calibration curve g of the pressure P relative to the output voltage V n (P, V) and a calibration curve F (T, P, V) with respect to temperature T, pressure P and output voltage V;
real-time acquisition of output voltage V of temperature sensor 0 And temperature T 0 And calculating a curve g of the pressure and the output voltage at the moment according to the calibration curves F (T, P, V) of the temperature T, the pressure P and the output voltage V 0 (P，V)；
According to g 0 (P, V) calculating to obtain the current pressure value P 0 As an output value after compensation.
2. The projectile-based projectile of claim 1The digital pressure sensor compensation method of the injection seat program controller is characterized in that a calibration curve g of pressure P relative to output voltage V n (P, V) are specifically:
V＝k n *P+b n
in the formula, k n At a temperature of T n Slope of the calibration curve under the conditions, b n At a temperature of T n The intercept of the curve is fixed under the conditions.
3. The ejection seat programmer-based digital pressure sensor compensation method as claimed in claim 2, wherein the temperature T is 0 Curve g of time pressure versus output voltage 0 (P, V) are specifically:
V＝k 0 *P+b 0
in the formula, k 0 Is a temperature T 0 The slope of the time scaling curve, b 0 Is a temperature T 0 The intercept of the curve is calibrated.
4. The digital pressure sensor compensation method based on the ejection seat programmer of claim 3,
when T is n-1 <T 0 <T n And | T n -T 0 |≥|T 0 -T n-1 In the case of l, the number of the terminal,
when T is n-1 <T 0 <T n And | T n -T 0 |<|T 0 -T n-1 When |
In the formula, T n Temperature points were selected for calibration of the curves.
5. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1-4 are implemented when the computer program is executed by the processor.
6. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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| CN202211319262.5A CN115575032A (en) | 2022-10-26 | 2022-10-26 | Digital pressure sensor compensation method based on ejection seat program controller |
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| CN202211319262.5A CN115575032A (en) | 2022-10-26 | 2022-10-26 | Digital pressure sensor compensation method based on ejection seat program controller |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936791A (en) * | 2010-07-28 | 2011-01-05 | 四川蜀谷仪表科技有限公司 | Digital pressure gauge |
| CN103837300A (en) * | 2014-03-19 | 2014-06-04 | 成都千嘉科技有限公司 | Pressure sensor calibration method with temperature compensation function |
| CN109323792A (en) * | 2018-11-15 | 2019-02-12 | 航宇救生装备有限公司 | A kind of intelligent temperature-compensation method based on ejector seat program controller pressure sensor |
| CN109540343A (en) * | 2018-11-21 | 2019-03-29 | 航宇救生装备有限公司 | A kind of intelligent temperature-compensation method based on ejector seat program controller sensor |
| CN111391355A (en) * | 2020-03-17 | 2020-07-10 | 南京晨光集团有限责任公司 | Silicone rubber core mold expansion pressure testing and controlling method |
-
2022
- 2022-10-26 CN CN202211319262.5A patent/CN115575032A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936791A (en) * | 2010-07-28 | 2011-01-05 | 四川蜀谷仪表科技有限公司 | Digital pressure gauge |
| CN103837300A (en) * | 2014-03-19 | 2014-06-04 | 成都千嘉科技有限公司 | Pressure sensor calibration method with temperature compensation function |
| CN109323792A (en) * | 2018-11-15 | 2019-02-12 | 航宇救生装备有限公司 | A kind of intelligent temperature-compensation method based on ejector seat program controller pressure sensor |
| CN109540343A (en) * | 2018-11-21 | 2019-03-29 | 航宇救生装备有限公司 | A kind of intelligent temperature-compensation method based on ejector seat program controller sensor |
| CN111391355A (en) * | 2020-03-17 | 2020-07-10 | 南京晨光集团有限责任公司 | Silicone rubber core mold expansion pressure testing and controlling method |
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