CN112051464A - Fault detection method and system for dual-channel airborne pressure sensor - Google Patents
Fault detection method and system for dual-channel airborne pressure sensor Download PDFInfo
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- CN112051464A CN112051464A CN202010860924.4A CN202010860924A CN112051464A CN 112051464 A CN112051464 A CN 112051464A CN 202010860924 A CN202010860924 A CN 202010860924A CN 112051464 A CN112051464 A CN 112051464A
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000009977 dual effect Effects 0.000 claims description 13
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The application provides a binary channels machine carries pressure sensor fault detection method, and the application belongs to aviation electromechanical technical field, the method includes: acquiring the current value of the pressure sensor in each channel; if the current value of the pressure sensor of the single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in fault; or if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, the double-channel pressure sensor is judged to be in fault. According to the double-channel airborne pressure sensor fault detection method and system, whether the pressure sensor breaks down or not can be accurately judged by detecting and judging the current value of the double channels, and airplane safety is provided.
Description
Technical Field
The application belongs to the technical field of aeronautic electromechanics, and particularly relates to a fault detection method for a dual-channel airborne pressure sensor.
Background
The pressure of the airborne equipment in the airplane is important for flight safety, and when the pressure is ultrahigh, the airborne equipment possibly fails, so that the flight safety is seriously influenced.
For on-board pressure, measurements are typically made using on-board pressure sensors. However, if a fault occurs in the conventional airborne pressure sensor, most of the conventional airborne pressure sensors cannot detect and report the fault, so that once the pressure sensor fails, ground staff cannot timely know the fault, and even the long-time fault of the pressure sensor occurs, so that the risk that the safety of the airplane is affected by the short circuit on the airplane is caused.
Disclosure of Invention
It is an object of the present application to provide a dual channel on-board pressure sensor fault detection method and system to solve or mitigate at least one of the problems of the background art.
On one hand, the technical scheme of the application is as follows: a dual channel on-board pressure sensor fault detection method, comprising:
acquiring the current value of the pressure sensor in each channel;
if the current value of the pressure sensor of the single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in fault; or
And if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, judging that the pressure sensors of the two channels are in fault.
Further, if the current value obtained by the pressure sensor is smaller than the lower current limit of the pressure sensor, the current channel of the pressure sensor is in an open circuit fault.
Further, if the current value obtained by the pressure sensor is greater than the upper current limit of the pressure sensor, the current channel of the pressure sensor is in a short-circuit fault.
Further, the value of the current of the pressure sensor can be converted to obtain the pressure value measured by the pressure sensor.
On the other hand, the technical scheme of the application is as follows: a dual channel on-board pressure sensor fault detection system, the system comprising:
the current acquisition device is used for acquiring the current value of the pressure sensor in each channel;
the data processing device is used for judging the faults of the pressure sensors, and if the current value of the pressure sensor of a single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in a fault state; or if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, the double-channel pressure sensor is judged to be in fault.
Further, if the current value obtained by the pressure sensor is smaller than the lower current limit of the pressure sensor, the current channel of the pressure sensor is in an open circuit fault.
Further, if the current value obtained by the pressure sensor is greater than the upper current limit of the pressure sensor, the current channel of the pressure sensor is in a short-circuit fault.
Further, the value of the current of the pressure sensor can be converted to obtain the pressure value measured by the pressure sensor.
According to the double-channel airborne pressure sensor fault detection method and system, whether the pressure sensor breaks down or not can be accurately judged by detecting and judging the current value of the double channels, and airplane safety is provided.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic diagram of a dual channel pressure sensor fault detection method of the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to solve the above-mentioned problems identified in the background, there is provided herein a dual channel on-board pressure sensor fault detection method, the method comprising:
acquiring the current value of the pressure sensor in each channel;
if the current value of the pressure sensor of a single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the current channel of the pressure sensor is in fault, namely the two-channel pressure sensor is in fault; or if the current difference value of the pressure sensors of the two channels exceeds the preset difference value, the two channels of the pressure sensors have problems, and the double-channel pressure sensors are judged to be in fault universally.
In an embodiment of the method of the present application, if the current value obtained by the pressure sensor is smaller than the lower current limit of the pressure sensor, the pressure sensor is an open circuit fault.
In an embodiment of the method of the present application, if the current value obtained by the pressure sensor is greater than the upper current limit of the pressure sensor, the pressure sensor is in a short-circuit fault.
In the method, the pressure value measured by the pressure sensor can be converted through the current value of the pressure sensor.
The method provided by the application detects the fault of the pressure sensor by acquiring the current value of the pressure sensor and comparing the current acquisition values of the two channels of the pressure sensor, and when the difference value acquired by the two channels exceeds a certain range; meanwhile, the current upper limit range and the current lower limit range are set for a single channel value, and if the current upper limit range and the current lower limit range exceed the current upper limit range, the pressure sensor fault can be detected, so that ground staff can be reminded in time, and the influence of the pressure sensor fault on the safety of the airplane is avoided.
To this end, the present application further provides a dual channel on-board pressure sensor fault detection system, the system comprising:
the current acquisition device is used for acquiring the current value of the pressure sensor in each channel;
the data processing device is used for judging the faults of the pressure sensors, and if the current value of the pressure sensor of a single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in a fault state; or if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, the double-channel pressure sensor is judged to be in fault.
In the system of the present application, the current acquisition device may be a pressure sensor itself having a current detection function, or may be an ammeter connected in parallel to the pressure sensor. The data processing device may be a separately provided device with data processing capability, such as a CPU, a DSP, an FPGA, or a device or system with data processing capability in the aircraft. For example, in an embodiment of the present application, the data processing device is an electromechanical integrated management system.
For example, in an embodiment of the present application, the fault detection process of the dual-redundancy/dual-channel pressure sensor with a range of (0-35) MPa is as follows:
the linear corresponding current value of the pressure sensor with the pressure of (0-35) MPa is (4-20) mA;
the electromechanical integrated management system respectively collects current values of two channels of the pressure sensor, and for each channel sampling value of the pressure sensor, if the current value collected by the electromechanical integrated management system is less than 4mA or the current value is more than 20mA, the channel of the pressure sensor is judged to be in fault; meanwhile, the electromechanical integrated management system compares the current acquisition values of the two channels, and if the values of the two channels are both in a normal range and the difference value exceeds 0.46mA (1MPa), the pressure sensor is judged to be in fault.
When the current value acquired by the comprehensive electromechanical management system is smaller than 4mA, namely the current value is smaller than 0MPa relative to the measured pressure and exceeds the lower measurement limit value of the pressure sensor, the circuit channel of the pressure sensor can be considered as an open-circuit fault.
When the current value acquired by the electromechanical integrated management system is greater than 20mA, namely the current value is greater than 35MPa relative to the measured pressure and exceeds the upper limit value of the pressure sensor, the channel of the pressure sensor can be considered as a short-circuit fault.
The method and the system for detecting the faults of the airborne pressure sensor are applied to various airplanes and carry out trial flight verification, the fault detection rate of the airborne pressure sensor is greatly improved after the method is adopted, and meanwhile the risk that the safety of the airplane is affected due to the fact that the faults of the pressure sensor are not found in time to generate secondary disasters is reduced.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A dual channel on-board pressure sensor fault detection method, comprising:
acquiring the current value of the pressure sensor in each channel;
if the current value of the pressure sensor of the single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in fault; or
And if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, judging that the pressure sensors of the two channels are in fault.
2. The dual channel on-board pressure sensor fault detection method of claim 1, wherein if the current value obtained by the pressure sensor is less than the lower current limit of the pressure sensor, the current channel of the pressure sensor is an open circuit fault.
3. The method for detecting the fault of the dual-channel on-board pressure sensor as claimed in claim 1, wherein if the current value obtained by the pressure sensor is larger than the upper current limit of the pressure sensor, the current channel of the pressure sensor is a short-circuit fault.
4. The dual channel on-board pressure sensor fault detection method of any one of claims 1 to 3, wherein a pressure value measured by the pressure sensor can be converted by a current value of the pressure sensor.
5. A dual channel on-board pressure sensor fault detection system, the system comprising:
the current acquisition device is used for acquiring the current value of the pressure sensor in each channel;
the data processing device is used for judging the faults of the pressure sensors, and if the current value of the pressure sensor of a single channel is smaller than the lower current limit of the pressure sensor or larger than the upper current limit of the pressure sensor, the double-channel pressure sensor is judged to be in a fault state; or if the current difference value of the pressure sensors of the two channels exceeds a preset difference value, the double-channel pressure sensor is judged to be in fault.
6. The dual channel on-board pressure sensor fault detection system of claim 5, wherein the pressure sensor is an open circuit fault if the value of the current drawn by the pressure sensor is less than a lower current limit of the pressure sensor.
7. The dual channel on-board pressure sensor fault detection system of claim 5, wherein the pressure sensor is a short circuit fault if the value of the current drawn by the pressure sensor is greater than an upper current limit of the pressure sensor.
8. The dual channel on-board pressure sensor fault detection system of any of claims 5-7, wherein a pressure value measured by the pressure sensor is convertible to a current value of the pressure sensor.
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| CN202010860924.4A CN112051464A (en) | 2020-08-25 | 2020-08-25 | Fault detection method and system for dual-channel airborne pressure sensor |
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| CN202010860924.4A CN112051464A (en) | 2020-08-25 | 2020-08-25 | Fault detection method and system for dual-channel airborne pressure sensor |
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Cited By (3)
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| CN112903187A (en) * | 2021-03-11 | 2021-06-04 | 武汉飞恩微电子有限公司 | Method and device for detecting faults of pressure sensor in electric pressure cooker |
| CN114111874A (en) * | 2021-11-11 | 2022-03-01 | 中国航发沈阳发动机研究所 | Fault diagnosis and reconstruction method for dual-redundancy sensor |
| CN115219086A (en) * | 2022-06-28 | 2022-10-21 | 中国第一汽车股份有限公司 | Pressure sensor identification method, device, equipment and storage medium |
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Application publication date: 20201208 |