Fuel pressure sensor performance test system based on data analysis

Abstract

The present application relates to the field of fuel pressure sensor testing, and aims to solve the problem of inaccurate detection caused by single detection means during the detection of fuel pressure sensor, and specifically relates to a fuel pressure sensor performance testing system based on data analysis; in the present application, when detecting the fuel pressure sensor, the conventional pressure reading of the fuel pressure sensor, the sensor pressure offset phenomenon during pressure fluctuation, and the interference condition when the pressure exceeds the upper and lower limits of the range are detected; when detecting the offset phenomenon of the fuel pressure sensor, the detection is further divided into two aspects, namely the pressure offset degree and the offset recovery speed, to ensure that the fuel pressure sensor after detection will not have the problems of large offset amount affecting normal use and slow offset recovery speed during use, so as to comprehensively detect the detection accuracy, offset phenomenon recovery ability and anti-interference ability of the fuel pressure sensor under harsh working conditions.

Description

Technical Field

[0001] This invention relates to the field of fuel pressure sensor testing, specifically a fuel pressure sensor performance testing system based on data analysis. Background Technology

[0002] In a car's fuel tank system, a fuel tank pressure sensor is used to detect the fuel tank pressure. It is installed on the fuel valve assembly and is an important component of the fuel control system. The fuel tank system's control unit controls fuel tank depressurization, fuel tank cap unlocking, and fuel tank leak diagnosis based on the fuel tank pressure. If the fuel tank pressure sensor malfunctions, the fuel tank pressure detected by the sensor will be inaccurate, causing fuel tank depressurization, fuel tank cap unlocking, and fuel tank diagnosis to fail. Therefore, before the fuel pressure sensor leaves the factory, it needs to undergo performance testing to ensure that it can accurately monitor the pressure in the fuel tank and ensure the normal operation of the fuel tank.

[0003] Currently, existing fuel pressure sensor performance testing systems still have shortcomings. Traditional testing systems mostly test the fuel pressure sensor by running it under test and judging the accuracy of pressure detection based on the results of the test run. However, when the pressure sensor faces different operating conditions, drastic pressure changes and short-term excessive high and low pressure may cause the pressure sensor to malfunction. Therefore, the test results are not comprehensive enough by simply collecting air pressure through the pressure sensor.

[0004] Meanwhile, during the operation of the pressure sensor, as the pressure fluctuates, the pressure sensor will generate pressure offset, and this pressure offset needs a certain amount of time to recover. This can lead to inaccurate detection and misjudgment when the pressure sensor detects changing pressure, thus reducing the accuracy of the detection system.

[0005] To address the aforementioned technical problems, this application proposes a solution. Summary of the Invention

[0006] In this invention, when testing the fuel pressure sensor, the conventional pressure reading, the sensor pressure offset phenomenon during pressure fluctuations, and the interference situation when the pressure exceeds the upper and lower limits of the range are all tested. This comprehensively tests the detection accuracy, offset phenomenon recovery ability, and anti-interference ability under harsh operating conditions of the fuel pressure sensor. By using multiple pressure detection methods, the detection comprehensiveness of the fuel pressure detection system is improved. This solves the problems of insufficient detection due to the single detection method and lack of detection capability for sensor anomalies caused by pressure changes in the fuel pressure sensor. Therefore, a fuel pressure sensor performance testing system based on data analysis is proposed.

[0007] The objective of this invention can be achieved through the following technical solution: a fuel pressure sensor performance testing system based on data analysis, comprising a test environment application unit, a limit direction test unit, a durability direction test unit, a pressure feedback test unit, and a recovery detection unit;

[0008] The test environment application unit is used to adjust the air pressure in the test chamber to achieve different air pressure test environments, and at the same time, it identifies the air pressure in the air pressure test environment and generates the actual air pressure.

[0009] The durability direction testing unit can send pressure rise signals, pressure fall signals, and air pressure fluctuation signals to the testing environment application unit, so that the testing environment application unit can control the air pressure environment of the testing chamber to change.

[0010] The extreme direction test unit can generate an over-limit test signal and send the over-limit test signal to the test environment application unit, so that the test environment application unit changes the air pressure in the test chamber;

[0011] The pressure feedback test unit can collect the pressure inside the test chamber and obtain the test pressure based on the collection results. The pressure feedback test unit can obtain the actual air pressure of different test environments multiple times through the test environment application unit, compare the actual air pressure of multiple different test environments with the corresponding multiple test pressures, and generate air pressure collection results.

[0012] The recovery detection unit can collect and analyze the recovery speed of the pressure offset value of the fuel sensor after the pressure offset value is generated by the pressure feedback test unit, and generate a normal offset recovery signal or an abnormal offset recovery signal.

[0013] In a preferred embodiment of the present invention, the durability direction testing unit generates a pressure rise signal based on a preset rising pressure value and a pressure fall signal based on a preset falling pressure value.

[0014] After the test environment application unit acquires the pressure rise signal, it controls the pressure in the test chamber to increase. When the pressure increases to the rise pressure value in the pressure rise signal, it maintains the pressure in the test chamber unchanged. After the test environment application unit acquires the pressure fall signal, it controls the pressure in the test chamber to fall. When the pressure falls to the fall pressure value in the pressure fall signal, it maintains the pressure in the test chamber unchanged. The test environment application unit records the rise pressure value or fall pressure value as real-time pressure.

[0015] After acquiring the real-time pressure, the test environment application unit generates a pressure change completion signal and sends the pressure change completion signal to the pressure feedback test unit.

[0016] In a preferred embodiment of the present invention, after receiving the pressure change completion signal, the pressure feedback test unit collects the pressure in the test chamber, compares the collected test pressure with the actual pressure, and generates an accurate pressure acquisition signal if the difference between the test pressure and the actual pressure is within the allowable error range. If the difference between the test pressure and the actual pressure is not within the allowable error range, an inaccurate pressure acquisition signal is generated. The pressure feedback test unit sends the inaccurate pressure acquisition signal through the network to generate a test failure result.

[0017] In a preferred embodiment of the present invention, after the pressure feedback test unit generates an accurate air pressure acquisition signal, the durability direction test unit continues to generate a continuous variation signal, wherein the continuous variation signal includes multiple sets of air pressure rise and fall signals. The durability direction test unit sends the continuous variation signal to the test environment application unit. After receiving the continuous variation signal, the test environment application unit executes the air pressure variation information in the continuous variation signal sequentially, controls the air pressure in the test chamber to undergo multiple continuous changes of pressurization and depressurization, and generates an air pressure fluctuation completion signal after the continuous air pressure variation is completed and sends it to the pressure feedback test unit. At the same time, the actual air pressure in the test chamber after the continuous air pressure variation is completed is sent to the pressure feedback test unit.

[0018] After receiving the air pressure fluctuation completion signal, the pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the actual air pressure. If the difference between the test air pressure and the actual air pressure is within the error allowable range, a normal fluctuation signal is generated. If the difference between the test air pressure and the actual air pressure is not within the error allowable range, the difference between the test air pressure and the actual air pressure is recorded as a pressure offset value.

[0019] The pressure feedback test unit compares the pressure offset value with a preset allowable offset range. If the pressure offset value is greater than the preset allowable offset range, an offset exceeding the limit signal is generated. If the pressure offset value is less than or equal to the preset allowable offset range, an offset passing signal is generated.

[0020] In a preferred embodiment of the present invention, after generating a pressure offset value, the pressure feedback test unit sends a timing signal to the recovery detection unit. Simultaneously, the pressure feedback test unit calculates the pressure offset value in real time. When the pressure offset value is less than the allowable error range, a timing end signal is generated. The recovery detection unit starts timing after receiving the timing signal and stops timing after receiving the timing end signal. The timing duration is recorded as the offset recovery duration, and the offset recovery duration is compared with a preset duration range. If the offset recovery duration is less than or equal to the preset temperature duration range, a normal offset recovery signal is generated. If the offset recovery duration is greater than the preset duration range, an abnormal offset recovery signal is generated.

[0021] In a preferred embodiment of the present invention, the extreme direction testing unit can generate a pressure over-limit test signal. The extreme direction testing unit sends the over-limit test signal to the test environment application unit. After acquiring the over-limit test signal, the test environment application unit controls the air pressure in the test chamber to rise or fall. When the air pressure in the test chamber rises, the air pressure in the test chamber rises to a certain limit exceeding the maximum air pressure that the fuel pressure sensor can measure. When the air pressure in the test chamber falls, the air pressure in the test chamber falls to a certain limit below the minimum air pressure that the fuel pressure sensor can measure.

[0022] In a preferred embodiment of the present invention, after the test environment application unit adjusts the air pressure in the test chamber according to the over-limit test signal, it restores the air pressure in the test chamber to the pressure before the change. The pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the pressure before the change. If the difference between the test air pressure and the pressure before the change is within the allowable error range, a test pass signal is generated. If the difference between the test air pressure and the pressure before the change is not within the allowable error range, a test fail signal is generated.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In this invention, when testing the fuel pressure sensor, the conventional pressure reading of the fuel pressure sensor, the sensor pressure deviation phenomenon during pressure fluctuations, and the interference situation when the pressure exceeds the upper and lower limits of the range are all tested. This comprehensively tests the detection accuracy, deviation phenomenon recovery ability, and anti-interference ability under harsh working conditions of the fuel pressure sensor. By using multiple pressure detection methods, the detection comprehensiveness of the fuel pressure detection system is improved, avoiding the problem of insufficient detection coverage caused by a single detection method.

[0025] 2. In this invention, when detecting the offset phenomenon of the fuel pressure sensor, the detection is divided into two aspects: the degree of pressure offset and the offset recovery speed. This ensures that the detection process can detect whether the degree of offset of the fuel pressure sensor exceeds the standard and whether the offset recovery speed of the fuel pressure sensor meets the standard. This ensures that the tested fuel pressure sensor will not have problems such as large offset or slow offset recovery speed that affect normal use.

[0026] 3. In this invention, by applying ultra-high pressure and ultra-low pressure to the fuel sensor, the comprehensiveness of the fuel pressure sensor detection is improved by detecting whether the fuel pressure sensor will be damaged or malfunction when facing a working environment with pressure exceeding the preset limit. Attached Figure Description

[0027] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a system flowchart of the present invention;

[0029] Figure 2 This is a system block diagram of the present invention. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 2 As shown, the fuel pressure sensor performance testing system based on data analysis includes a test environment application unit, an extreme direction test unit, a durability direction test unit, a pressure feedback test unit, and a recovery detection unit.

[0032] The test environment application unit is used to control the gas inlet and outlet in the test chamber where the fuel pressure sensor is located, thereby adjusting the ambient air pressure in the test chamber and recording it as the actual pressure.

[0033] The pressure feedback test unit controls the fuel pressure sensor to measure the ambient air pressure in the test chamber to obtain the test air pressure.

[0034] The durability direction test unit can acquire the rising pressure value or the falling pressure value, and generate a pressure rise signal based on the rising pressure value and a pressure fall signal based on the falling pressure value. The durability direction test unit sends the pressure rise signal and the pressure fall signal to the test environment application unit. After acquiring the pressure rise signal, the test environment application unit introduces air into the test chamber to control the pressure increase in the test chamber. When the pressure increases to the rising pressure value in the pressure rise signal, the air intake is stopped to maintain the pressure in the test chamber unchanged, and the rising pressure value is recorded as the real-time pressure.

[0035] After acquiring the pressure drop signal, the test environment application unit vents the test chamber to control the pressure drop in the test chamber. When the pressure drops to the drop pressure value in the pressure drop signal, the venting stops and the pressure in the test chamber remains unchanged. The drop pressure value is recorded as the real-time pressure.

[0036] After the test environment application unit acquires the real-time pressure, it generates a pressure change completion signal and sends the pressure change completion signal to the pressure feedback test unit.

[0037] After receiving the pressure change completion signal, the pressure feedback test unit collects the pressure in the test chamber and compares the collected test pressure with the actual pressure. If the difference between the test pressure and the actual pressure is within the allowable error range, an accurate pressure acquisition signal is generated. If the difference between the test pressure and the actual pressure is not within the allowable error range, an inaccurate pressure acquisition signal is generated. The pressure feedback test unit sends the inaccurate pressure acquisition signal through the network to generate a test failure result and terminate the fuel pressure sensor test.

[0038] Example 2: Please refer to Figure 1 - Figure 2 As shown, after the pressure feedback test unit generates an accurate air pressure acquisition signal, the durability test unit continues to generate a continuous variation signal, which includes multiple sets of air pressure rise and fall signals. The durability test unit sends the continuous variation signal to the test environment application unit. After receiving the continuous variation signal, the test environment application unit executes the air pressure variation information in the continuous variation signal sequentially, controlling the air pressure in the test chamber to undergo multiple continuous changes of pressurization and depressurization. After the continuous air pressure variation is completed, an air pressure fluctuation completion signal is generated and sent to the pressure feedback test unit. At the same time, the actual air pressure in the test chamber after the continuous air pressure variation is completed is sent to the pressure feedback test unit.

[0039] After receiving the pressure fluctuation completion signal, the pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the actual air pressure. If the difference between the test air pressure and the actual air pressure is within the allowable error range, a normal fluctuation signal is generated. If the difference between the test air pressure and the actual air pressure is not within the allowable error range, the difference between the test air pressure and the actual air pressure is recorded as a pressure offset value.

[0040] The pressure feedback test unit compares the pressure offset value with the preset allowable offset range. If the pressure offset value is greater than the preset allowable offset range, an offset exceeding signal is generated. If the pressure offset value is less than or equal to the preset allowable offset range, an offset passing signal is generated.

[0041] After generating the pressure offset value, the pressure feedback test unit sends a timing signal to the recovery detection unit. Simultaneously, the pressure feedback test unit calculates the pressure offset value in real time. When the pressure offset value is less than the allowable error range, it generates a timing end signal. The recovery detection unit starts timing upon receiving the timing signal and stops timing upon receiving the timing end signal. The timing duration is recorded as the offset recovery duration, and compared with a preset duration range. If the offset recovery duration is less than or equal to the preset temperature duration range, a normal offset recovery signal is generated. If the offset recovery duration is greater than the preset duration range, an abnormal offset recovery signal is generated. The recovery detection unit sends the abnormal recovery signal through the network and generates a test failure signal, simultaneously ending the fuel pressure sensor test.

[0042] Example 3: Please refer to Figure 1 - Figure 2 As shown, the extreme direction test unit can generate a pressure over-limit test signal. The extreme direction test unit sends the over-limit test signal to the test environment application unit. After acquiring the over-limit test signal, the test environment application unit controls the air pressure in the test chamber to rise or fall. When the air pressure in the test chamber rises, it rises to a certain limit exceeding the maximum air pressure that the fuel pressure sensor can measure. When the air pressure in the test chamber falls, it falls to a certain limit below the minimum air pressure that the fuel pressure sensor can measure. The certain limit is a manually input value, determined according to the parameters of the fuel sensor. When the test environment application unit adjusts the air pressure in the test chamber according to the over-limit test signal, it collects the air pressure in real time through another standard air pressure acquisition device. The range of the standard air pressure acquisition device is greater than the amplitude of the air pressure rise or fall in the test chamber.

[0043] After the test environment application unit adjusts the air pressure in the test chamber according to the over-limit test signal, the air pressure in the test chamber is restored to the original pressure. The pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the original air pressure. If the difference between the test air pressure and the original air pressure is within the allowable error range, a test pass signal is generated. If the difference between the test air pressure and the original air pressure is not within the allowable error range, a test fail signal is generated and sent through the network, and the test of the fuel pressure sensor ends.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fuel pressure sensor performance testing system based on data analysis, characterized in that, It includes a test environment application unit, an extreme direction test unit, a durability direction test unit, a pressure feedback test unit, and a recovery detection unit; The test environment application unit is used to adjust the air pressure in the test chamber to achieve different air pressure test environments, and at the same time, it identifies the air pressure in the air pressure test environment and generates the actual air pressure. The durability direction testing unit can send pressure rise signals, pressure fall signals, and air pressure fluctuation signals to the testing environment application unit, so that the testing environment application unit can control the air pressure environment of the testing chamber to change. The extreme direction test unit can generate an over-limit test signal and send the over-limit test signal to the test environment application unit, so that the test environment application unit changes the air pressure in the test chamber; The pressure feedback test unit can collect the pressure inside the test chamber and obtain the test pressure based on the collection results. The pressure feedback test unit can obtain the actual air pressure of different test environments multiple times through the test environment application unit, compare the actual air pressure of multiple different test environments with the corresponding multiple test pressures, and generate air pressure collection results. The recovery detection unit can collect and analyze the recovery speed of the pressure offset value of the fuel sensor after the pressure feedback test unit generates the pressure offset value, and generate a normal offset recovery signal or an abnormal offset recovery signal. After the pressure feedback test unit generates an accurate air pressure acquisition signal, the durability test unit continues to generate a continuous variation signal, which includes multiple sets of air pressure rise and fall signals. The durability test unit sends the continuous variation signal to the test environment application unit. After receiving the continuous variation signal, the test environment application unit executes the air pressure variation information in the continuous variation signal sequentially, controlling the air pressure in the test chamber to undergo multiple continuous changes of pressurization and depressurization. After the continuous air pressure variation is completed, an air pressure fluctuation completion signal is generated and sent to the pressure feedback test unit. At the same time, the actual air pressure in the test chamber after the continuous air pressure variation is completed is sent to the pressure feedback test unit. After receiving the air pressure fluctuation completion signal, the pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the actual air pressure. If the difference between the test air pressure and the actual air pressure is within the error allowable range, a normal fluctuation signal is generated. If the difference between the test air pressure and the actual air pressure is not within the error allowable range, the difference between the test air pressure and the actual air pressure is recorded as a pressure offset value. The pressure feedback test unit compares the pressure offset value with a preset allowable offset range. If the pressure offset value is greater than the preset allowable offset range, an offset exceeding signal is generated. If the pressure offset value is less than or equal to the preset allowable offset range, an offset passing signal is generated. After generating the pressure offset value, the pressure feedback test unit sends a timing signal to the recovery detection unit. Simultaneously, the pressure feedback test unit calculates the pressure offset value in real time. When the pressure offset value is less than the allowable error range, a timing end signal is generated. The recovery detection unit starts timing upon receiving the timing signal and stops timing upon receiving the timing end signal. The timing duration is recorded as the offset recovery duration, and the offset recovery duration is compared with a preset duration range. If the offset recovery duration is less than or equal to the preset duration range, a normal offset recovery signal is generated; if the offset recovery duration is greater than the preset duration range, an abnormal offset recovery signal is generated.

2. The fuel pressure sensor performance testing system based on data analysis according to claim 1, characterized in that, The durability direction test unit generates a pressure increase signal based on a preset upward pressure value and a pressure decrease signal based on a preset downward pressure value. After the test environment application unit acquires the pressure rise signal, it controls the pressure in the test chamber to increase. When the pressure increases to the rise pressure value in the pressure rise signal, it maintains the pressure in the test chamber unchanged. After the test environment application unit acquires the pressure fall signal, it controls the pressure in the test chamber to fall. When the pressure falls to the fall pressure value in the pressure fall signal, it maintains the pressure in the test chamber unchanged. The test environment application unit records the rise pressure value or fall pressure value as real-time pressure. After acquiring the real-time pressure, the test environment application unit generates a pressure change completion signal and sends the pressure change completion signal to the pressure feedback test unit.

3. The fuel pressure sensor performance testing system based on data analysis according to claim 2, characterized in that, After receiving the pressure change completion signal, the pressure feedback test unit collects the pressure in the test chamber and compares the collected test pressure with the actual pressure. If the difference between the test pressure and the actual pressure is within the allowable error range, an accurate pressure acquisition signal is generated. If the difference between the test pressure and the actual pressure is not within the allowable error range, an inaccurate pressure acquisition signal is generated. The pressure feedback test unit sends the inaccurate pressure acquisition signal through the network to generate a test failure result.

4. The fuel pressure sensor performance testing system based on data analysis according to claim 1, characterized in that, The extreme direction test unit can generate a pressure over-limit test signal. The extreme direction test unit sends the over-limit test signal to the test environment application unit. After acquiring the over-limit test signal, the test environment application unit controls the air pressure in the test chamber to rise or fall. When the air pressure in the test chamber rises, the air pressure in the test chamber rises to a certain limit exceeding the maximum air pressure that the fuel pressure sensor can measure. When the air pressure in the test chamber falls, the air pressure in the test chamber falls to a certain limit below the minimum air pressure that the fuel pressure sensor can measure.

5. The fuel pressure sensor performance testing system based on data analysis according to claim 4, characterized in that, After the test environment application unit adjusts the air pressure in the test chamber according to the over-limit test signal, it restores the air pressure in the test chamber to the original pressure. The pressure feedback test unit collects the air pressure in the test chamber and compares the collected test air pressure with the original air pressure. If the difference between the test air pressure and the original air pressure is within the allowable error range, a test pass signal is generated. If the difference between the test air pressure and the original air pressure is not within the allowable error range, a test fail signal is generated.

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