CN113638813B - Detection device and method for automobile ECU recycled part - Google Patents
Detection device and method for automobile ECU recycled part Download PDFInfo
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- CN113638813B CN113638813B CN202110911764.6A CN202110911764A CN113638813B CN 113638813 B CN113638813 B CN 113638813B CN 202110911764 A CN202110911764 A CN 202110911764A CN 113638813 B CN113638813 B CN 113638813B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention relates to ECU detection technology, in particular to a detection device and a method for an automobile ECU reuse part, wherein the method comprises the steps of detecting and uploading appearance information, and determining a stitch definition and a signal adaptation module of an ECU to be detected; establishing a computer oil injection model; setting working condition information and calculating theoretical oil injection quantity; the working condition simulation module inputs a simulation sensor signal to the ECU to be tested, collects an oil injection signal to obtain actual oil injection quantity, and compares the actual oil injection quantity with theoretical oil injection quantity to obtain oil injection performance; judging whether the ECU communication module to be tested is good or bad through the monitoring communication module; and uploading the detection result to a database to finish detection. The method solves the problems of complex and time-consuming detection of various types of automobile ECU recycled parts, realizes accurate detection of ECU performance under different working conditions by establishing an engine oil injection model, can compatibly detect ECUs of different types, reduces detection cost, improves resource utilization rate and reduces maintenance cost.
Description
Technical Field
The invention belongs to the technical field of ECU detection, and particularly relates to a device and a method for detecting an automobile ECU recycled part.
Background
With the increasing of automobile keeping quantity, the retirement quantity and the scrapping quantity of automobiles are also rapidly increased. As a typical electromechanical product, the automobile has huge recycling value after being scrapped, and under the overall goals of 'carbon peak reaching' and 'carbon neutralization', reuse of recycled parts is used as an automobile recycling mode with the best resource, environmental and economic benefits, and the automobile recycling method can meet the policy opportunity period of rapid development.
The ECU is one of the core elements of the automobile electronics, and functions to calculate, process, and determine the air flow meter and the information input by various sensors according to the programs and data stored in the ECU. And then outputting a command to provide an electric pulse signal with a certain width to the fuel injector so as to control the fuel injection quantity. At present, the design life of the ECU is far longer than the average retention time of the automobile, when the technical life of the whole automobile expires, the ECU still has a certain technical service life, and the reuse of the ECU can fully excavate the residual service life, improve the resource utilization rate and reduce the maintenance cost. And the ECU is reused, and the automobile ECU recycled part obtained by disassembly is subjected to quality detection and is directly loaded for use after being qualified, so that all investment in the manufacturing process is reserved, and no large new cost is caused. In the reuse process of the ECU, the quality detection of the automobile ECU reuse piece is very important.
The existing ECU detection equipment mostly aims at detection during ECU production, detection objects are single, a rack is basically adopted for detection, and cost is high. And when the automobile ECU recycling part is recycled, the problems of various models, complex detection, time consumption and the like exist, so that the ECU detection equipment is required to be compatible with ECUs of different brands, and the performance of the ECU can be quickly and accurately detected. The existing ECU detection technology cannot accurately and quickly realize the detection of the reclaimed parts of the ECUs of different types of automobiles.
Disclosure of Invention
Aiming at the problems in the background art, the invention provides equipment and a method suitable for detecting automobile ECU recycled parts.
In order to solve the technical problems, the invention adopts the following technical scheme: a detection device for an automobile ECU recycled part comprises an upper computer module, a working condition simulation module, a signal adaptation unit, a camera module and a signal acquisition module; the upper computer module is sequentially connected with the working condition simulation module, the signal adaptation unit and the ECU to be tested, the signal acquisition module is respectively connected with the upper computer module and the signal adaptation unit, and the camera module is respectively connected with the upper computer module and the ECU to be tested.
In above-mentioned car ECU retrieval and utilization piece detection device, the host computer module includes: the system comprises a database, a main control part and a data processing and visualization part; the main control part sets working condition data, adjusts the output of the working condition simulation module, the database part stores an ECU pin definition diagram and a detection report, and the data visualization part is used for receiving an output signal of the signal acquisition module and visualizing the data by using matplotlib; the signal adaptation unit comprises a protection circuit, a voltage conversion circuit and a signal adaptation module, wherein the protection circuit prevents the circuit from overloading, the voltage conversion circuit simulates different working conditions and sensors, and the signal adaptation module detects ECUs of different models.
The detection method based on the detection device for the automobile ECU recycled parts comprises the following steps:
step 1, collecting defect information of appearance corrosion, cracking and sinking of an ECU to be detected, and uploading the collected appearance defect information to an upper computer module;
step 2, determining pin definition of the ECU to be tested according to the type of the ECU to be tested, and adjusting the working mode of the signal adapting unit;
step 3, establishing an engine oil injection model and storing the engine oil injection model to an upper computer module;
step 4, setting the working condition information of the ECU to be tested, and inputting the output values of the analog sensors into an engine oil injection model to calculate the theoretical oil injection quantity;
step 5, the working condition simulation module inputs a simulation sensor signal to the ECU to be tested;
step 6, a signal acquisition module acquires an oil injection signal output by the ECU to be detected to obtain actual oil injection quantity, and the actual oil injection quantity is compared with theoretical oil injection quantity to obtain an oil injection performance detection result;
step 7, monitoring a CAN communication signal generated by a communication module of the ECU to be detected by a signal acquisition module, and judging whether the communication module of the ECU to be detected is damaged or not;
and 8, integrating the appearance, the oil spraying performance and the detection result of the communication module of the ECU to be detected into a detection report, displaying the detection report on a human-computer interaction interface of the upper computer module, uploading the detection report to a database, and finishing the detection.
In the detection method of the detection device for the recycled part of the automobile ECU, the step 1 is realized by the following steps:
step 1.1, rotating an ECU to be tested in an appearance image acquisition area of a workbench, acquiring an appearance image of the ECU to be tested through a camera module, and uploading the appearance image to an upper computer module;
step 1.2, extracting the appearance defects of the ECU to be detected by the upper computer module through the steps of image color space conversion, denoising, binarization and feature extraction;
and step 1.3, judging whether defects exist according to the appearance defect information.
In the detection method of the detection device for the recycled automobile ECU part, the step 2 is realized by:
step 2.1, pin definition information of the ECU to be detected is obtained through retrieval in a database;
2.2, adjusting the working mode of the signal adapting unit according to the stitch definition information of the ECU to be tested; if the signal is defined as a sensor or a power supply, adjusting the working mode of the corresponding adaptation unit into an output mode; if the pin is defined as the output signal, the corresponding working mode of the adapting unit is adjusted to be the acquisition mode.
In the detection method of the detection device for the automobile ECU recycled part, the step 3 of establishing the engine oil injection model comprises the following steps:
step 3.1, establishing an engine fuel injection quantity model as follows:
q＝q b +q c +q Δ
wherein q is the total fuel injection quantity of the automobile, and q is b Based on the quantity of fuel injected, q c To correct the injected quantity, q Δ Is the increment of oil injection;
and 3.2, if the basic fuel injection quantity of the automobile is the fuel quantity required when the ideal air-fuel ratio is maintained, and the ideal air-fuel ratio is 14.7, the calculation formula of the basic fuel injection quantity of each cycle of the engine is as follows:
q b ＝14.7×q a /n e
wherein q is b The oil injection amount is the basic oil injection amount per cycle; q. q.s a Is the air flow rate; n is a radical of an alkyl radical e Is the engine speed;
if the output value of the sensor of the external environment of the engine is not changed, the corrected fuel injection quantity is 0, namely q c ＝0；
And 3.3, introducing an acceleration gain coefficient, and regarding the acceleration and the fuel oil increment approximately as a linear relation, wherein the fuel oil increment is as follows:
q Δ ＝k×a×14.7×q a /n e
wherein a is the acceleration of the vehicle body; k is an acceleration gain coefficient, is related to the acceleration of the automobile, and is positive when the automobile is accelerated and negative when the automobile is decelerated; the k value is obtained by fitting a data sample;
and 3.4, calculating an oil injection quantity model as follows:
q＝(1+ka)14.7×q a /n e 。
in the detection method of the detection device for the recycled part of the automobile ECU, the step 4 is realized by the following steps:
step 4.1, the detection personnel sets working condition information, wherein the working condition information is the output value of each analog sensor;
and 4.2, outputting a signal by the working condition simulation module according to the set working condition information to enable the ECU to be tested to generate an oil injection signal.
In the detection method of the detection device for the recycled automobile ECU part, the step 5 comprises the following steps:
step 5.1, simulating the output value of the air flow sensor to obtain air inflow through the step 4, simulating the output value of the crankshaft position sensor to obtain the rotating speed of the engine, and simulating the output value of the acceleration sensor to obtain the acceleration information of the vehicle body;
and 5.2, inputting the information of the rotating speed, the air inflow and the acceleration of the engine into an engine oil injection model, and calculating the theoretical oil injection quantity of each cycle by the engine oil injection model.
In the detection method of the detection device for the recycled part of the automobile ECU, the step 6 comprises the following steps:
step 6.1, a signal acquisition module acquires an oil injection signal sent by an ECU to be detected, the oil injection signal is sent to an upper computer, the oil injection signal is processed through a data visualization part to obtain the actual oil injection quantity of each cycle, and the oil injection signal is displayed on an operation interface after being visualized;
and 6.2, comparing the actual fuel injection quantity with the theoretical fuel injection quantity, and if the difference between the actual fuel injection quantity and the theoretical fuel injection quantity is not greater than a threshold value, judging that the fuel injection performance of the ECU to be detected reaches the standard.
In the detection method of the detection device for the recycled part of the automobile ECU, the step 7 is realized by the following steps: and monitoring whether the ECU to be tested sends a frame start signal and a frame end signal by adopting a CAN bus detection method, and judging whether the communication module of the ECU to be tested is good or bad.
Compared with the prior art, the invention has the beneficial effects that: the invention establishes an engine oil injection model and can accurately calculate the theoretical oil injection quantity of the engine. The signal adaptation module is provided, can be compatible with detection of ECUs of different models, reduces complex work when detecting different ECUs, and reduces detection cost. Through detecting appearance defect coarse sorting ECU, realize the accurate detection to ECU performance through detecting oil spout performance and communication performance, under the circumstances of guaranteeing to detect the accuracy, saved check-out time and detection cost.
Drawings
FIG. 1 is a flow chart of a method for detecting the quality of a recycled part by using an automobile ECU according to an embodiment of the invention;
FIG. 2 is a structural diagram of a quality detection device for recycled parts of an automobile ECU according to an embodiment of the invention;
FIG. 3 is a block diagram of an upper computer module of a device for detecting quality of a recycled part of an automobile ECU according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a signal adaptation module of a quality detection device for a recycled part of an automobile ECU according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an interface between a signal adapting unit and an ECU to be shut down of a quality detection device for an automotive ECU reuse part according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
According to the embodiment, aiming at the characteristics of various models of ECU recycling parts, complex detection, time consumption and the like, the engine oil injection model is established, the accurate detection of the ECU performance under different working conditions is realized, and meanwhile, ECUs of different models can be compatibly detected, so that the detection cost is reduced, and the resource utilization rate is improved.
The embodiment is realized by the following technical scheme, as shown in fig. 2, the detection device of the automobile ECU recycled part comprises an upper computer module, a working condition simulation module, a signal adaptation unit, a camera module and a signal acquisition module; the upper computer module is sequentially connected with the working condition simulation module, the signal adaptation module and the ECU to be tested, the signal acquisition module is respectively connected with the upper computer module and the signal adaptation module, and the camera module is respectively connected with the upper computer module and the ECU to be tested.
As shown in fig. 3, the upper computer module includes: the system comprises a database, a main control interface and a data processing and visualization part.
As shown in fig. 4, the signal adapting unit is composed of a protection circuit, a voltage conversion circuit and a signal adapting unit, and can send and collect signals to ECUs of different models. As shown in fig. 5, the signal adapting unit is schematically interfaced with the to-be-absent ECU.
As shown in fig. 1, the detection method using the detection device for the recycled part of the automobile ECU comprises the following steps:
step 1) detecting whether appearance defects including corrosion, cracking, depression and the like exist in an ECU to be detected, and uploading appearance information to an upper computer module;
step 2) determining pin definition of the ECU to be tested according to the model information of the ECU to be tested, and adjusting the working mode of the signal adapting unit;
step 3), establishing an engine oil injection model, and storing the engine oil injection model in an upper computer module;
step 4) setting the working condition information of the ECU to be detected, and inputting the output values of the analog sensors into an engine oil injection model to calculate the theoretical oil injection quantity;
step 5) the working condition simulation module inputs a simulation sensor signal to the ECU to be tested;
step 6) the signal acquisition module acquires an oil injection signal output by the ECU to be detected to obtain actual oil injection quantity, and the actual oil injection quantity is compared with theoretical oil injection quantity to obtain an oil injection performance detection result;
step 7), the signal acquisition module monitors whether the communication module generates a data transmission signal or not, and judges whether the communication module of the ECU to be tested is good or not;
and 8) integrating the appearance, the oil spraying performance and the detection result of the communication module of the ECU to be detected into a detection report which is displayed on a human-computer interaction interface of the upper computer module and uploaded to a database, and finishing the detection.
And step 1), the appearance defect detection is that the camera module collects the appearance information of the ECU to be detected, and the upper computer module judges whether defects exist according to the appearance information.
Step 2) retrieving pin definition information of the ECU to be detected from a database; adjusting the working mode of the signal adapting unit according to the stitch definition information of the ECU to be tested; if the signal is defined as a sensor or a power supply, adjusting the working mode of the corresponding adaptation unit into an output mode; if the pin is defined as the output signal, the corresponding working mode of the adapting unit is adjusted to be the acquisition mode.
And 3) establishing an engine fuel injection model, and calculating theoretical fuel injection quantity under different working conditions. The fuel injection quantity of the automobile consists of three parts, namely basic fuel injection quantity, corrected fuel injection quantity and fuel injection increment. The basic fuel injection quantity is the fuel quantity required by meeting the ideal air-fuel ratio, the corrected fuel injection quantity is the correction quantity made to the fuel injection quantity in order to adapt to the external environment, and the fuel injection increment is the fuel quantity increased or reduced in order to adapt to the change of the working condition. The engine fuel injection quantity model is as follows:
q＝q b +q c +q Δ
q is the total fuel injection quantity of the automobile b Based on the quantity of injected fuel, q c To correct the injected quantity, q Δ Is the increment of the oil injection.
The air-fuel ratio in the stoichiometric state was 14.7. The basic fuel injection quantity per cycle of the engine is calculated by the formula:
q b ＝14.7×q a /n e
q b the oil injection amount is the basic oil injection amount per cycle; q. q.s a Is the air flow rate; n is e Is the engine speed.
If the output value of the external environment sensor of the engine is set to be unchanged, the corrected fuel injection quantity is 0, namely q c ＝0。
When the automobile accelerates, the mixed gas becomes thin, and when the automobile decelerates, the mixed gas becomes thick. Therefore, the fuel injection quantity of the automobile is properly increased during acceleration, and the fuel injection quantity is properly reduced during deceleration. Here we introduce an acceleration gain factor, and consider the acceleration and fuel increment approximately as a linear relationship. The fuel increment is:
q Δ ＝k×a×14.7×q a /n e
a is the acceleration of the vehicle body; and k is an acceleration gain coefficient, is related to the acceleration of the automobile, and is positive when the automobile accelerates and is negative when the automobile decelerates. k values were obtained by fitting data samples.
The fuel injection quantity calculation model is as follows:
q＝(1+ka)14.7×q a /n e
the signal adaptation module in the step 3) consists of a protection circuit, a voltage conversion circuit and a signal adaptation unit and can send signals and collect signals to ECUs to be tested of different models. The method comprises the steps of inputting the model information of the ECU to be detected, automatically retrieving the pin definition diagram of the ECU to be detected in a database by an upper computer module, and adjusting the working mode of a signal adapting unit according to the pin definition of the ECU to be detected so as to be compatible with the detection of ECUs of different models.
Step 4), setting working condition information by a detector, wherein the working condition information is the output value of each analog sensor; and the working condition simulation module outputs a signal according to the set working condition information, so that the ECU to be tested generates an oil injection signal.
And 5) the working condition simulation module can simulate the output of the automobile sensor, so that the ECU to be tested works under the specified working condition. The working condition simulation module simulates the output of the sensor according to the working condition data of the upper computer module, and prompts the ECU to be tested to send out an oil injection signal and a CAN communication signal under the specified working condition.
Step 6) acquiring an oil injection signal sent by the ECU to be detected by the signal acquisition module, sending the oil injection signal to an upper computer, processing the oil injection signal through a data visualization part to obtain the actual oil injection amount of each cycle, visualizing the oil injection signal and displaying the visualized oil injection signal on an operation interface; and comparing the actual fuel injection quantity with the theoretical fuel injection quantity, and if the difference between the actual fuel injection quantity and the theoretical fuel injection quantity is not greater than a threshold value, judging that the fuel injection performance of the ECU to be tested reaches the standard.
And 7) monitoring the ECU communication module to be tested by the signal acquisition module, and monitoring whether the ECU to be tested sends a frame start signal and a frame end signal by a CAN bus detection method for judging the quality of the ECU communication module to be tested.
And 8) compiling the human-computer interaction interface by the PYQT, wherein the human-computer interaction interface comprises a main control part, a database part and a data visualization part. The main control part sets working condition data and adjusts the output of the working condition simulation module; the database stores a stitch definition map and a detection report of the ECU to be detected; the data visualization part is used for receiving the output signal of the signal acquisition module and visualizing the data by using matplotlib.
In specific implementation, as shown in fig. 1, a method for detecting a recycled part of an automobile ECU comprises the following detection processes:
s1, placing the ECU to be detected in an appearance image acquisition area of the workbench by a detector, acquiring appearance information of the ECU to be detected through the camera module, and transmitting the appearance information to the upper computer module; the upper computer module extracts appearance defects of the ECU to be detected through steps of image color space conversion, denoising, binaryzation and feature extraction; the specific treatment process is as follows: firstly, converting an image into a gray-scale image; carrying out self-adaptive median filtering to eliminate noise influence; then binarizing the picture; and extracting appearance defects of the ECU through a canny operator.
S2, after the appearance information is collected, inputting the model information of the ECU to be detected, retrieving the information in a database by the upper computer module according to the input information to obtain the detailed stitch definition information of the ECU to be detected, and adjusting the working mode of the corresponding adapting unit into an output mode if the information is defined as a sensor or a power supply; if the pin is defined as the output signal, the corresponding working mode of the adapting unit is adjusted to be the acquisition mode.
S3, establishing an engine oil injection model, wherein the automobile oil injection quantity consists of three parts, namely basic oil injection quantity, and oil injection quantity and oil injection increment are corrected. The fuel injection quantity model of the automobile is as follows:
q＝q b +q c +q Δ
q is the total fuel injection quantity of the automobile b Ideal fuel injection quantity, q c For repairingPositive fuel injection quantity, q Δ Is the increment of the oil injection.
The basic fuel injection quantity of the automobile is the fuel quantity required when the ideal air-fuel ratio is maintained, and the fuel combustion equation is as follows:
the air-fuel ratio in the ideal state is 14.7 as seen by the fuel equation. The basic fuel injection quantity per cycle of the engine is calculated by the formula:
q b ＝14.7×q a /n e
q b the oil injection amount is the basic oil injection amount per cycle; q. q.s a Is the air flow rate; n is e Is the engine speed.
When the external environment of the engine changes, such as the air inlet temperature, the atmospheric pressure and the voltage of the storage battery, the correction of the fuel injection quantity is needed to ensure the normal operation of the engine. Here again, we set the output value of the sensor of the external environment of the engine to be constant, and then correct the fuel injection quantity to be 0, that is, q c ＝0。
When the operating conditions of the engine change, such as a starting process, an acceleration process and a deceleration process, correction needs to be carried out on the basis of basic fuel injection quantity. If only the basic fuel injection amount is used during acceleration or deceleration, the air-fuel ratio of the mixture may deviate from the target air-fuel ratio. The mixed gas becomes thin when accelerating and becomes thick when decelerating. Therefore, the fuel injection quantity of the automobile is properly increased during acceleration, and the fuel injection quantity is properly reduced during deceleration. Here we introduce an acceleration gain factor, and consider the acceleration and fuel increment approximately as a linear relationship. The fuel increment is:
q Δ ＝k×a×14.7×q a /n e
a is the acceleration of the automobile; and k is an acceleration gain coefficient, is related to the acceleration of the automobile, and is positive when the automobile accelerates and is negative when the automobile decelerates. The k value is calculated by fitting the data samples.
In summary, the fuel injection quantity calculation model is:
q＝(1+ka)14.7×q a /n e
the air inflow of the engine can be obtained through an air flow meter sensor, and the rotating speed of the engine can be obtained through a crankshaft position sensor, so that the theoretical oil injection quantity can be calculated through an oil injection quantity calculation model under the specified working condition.
And S4, setting working condition information by a detector on the upper computer module, wherein the preset working conditions are 3, namely acceleration, braking and uniform speed. The working condition simulation module prompts the ECU to be tested to generate an oil injection signal through simulating the air flow sensor, the throttle opening sensor and the crankshaft position sensor.
S5, according to the output value of the simulation air flow sensor set in S4, the air intake quantity can be obtained, the engine speed can be obtained according to the simulation crankshaft position sensor, the acceleration information of the vehicle body can be obtained according to the simulation acceleration sensor, the engine speed, the air intake quantity and the acceleration information are input into an engine fuel injection model, and the fuel injection model automatically calculates the theoretical fuel injection quantity of each cycle.
And S6, the signal acquisition module acquires an oil injection signal sent by the ECU to be tested, sends the oil injection signal to the upper computer module, processes the oil injection signal through the data visualization part to obtain the actual oil injection quantity of each cycle, visualizes the oil injection signal and displays the visualized oil injection signal on the operation interface. And after the theoretical oil injection quantity and the actual oil injection quantity are obtained, if the difference between the theoretical oil injection quantity and the actual oil injection quantity is not larger than a threshold value, judging that the oil injection performance of the ECU to be measured reaches the standard.
S7 when the ECU to be tested sends an oil injection signal, the data is also sent through the CAN bus. The signal acquisition module continuously acquires voltage values of CAN high and CAN low. The CAN bus sends CAN data frames, and each piece of sent data has frame start and frame end according to the coding rule of the CAN data frames. The start of a frame consists of 1 low level and the end of a frame consists of 7 high levels. According to the CAN bus communication rule, when CAN high-CAN low is less than 0.5V, the logic signal is expressed as logic 1 and is in high level, when CAN high-CAN low is more than 0.9V, the logic signal is expressed as logic 0 and is in low level. If the frame start can be monitored during data transmission and the frame end can be detected after the data transmission is finished, the communication performance of the ECU to be tested is normal.
And S8, integrating the appearance information, the oil injection data and the communication data of the ECU to be detected to generate a detection report, uploading the detection report to a database, and finishing the detection.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A method for a detection device of a recycled part of an automobile ECU is characterized in that: the detection device comprises an upper computer module, a working condition simulation module, a signal adaptation unit, a camera module and a signal acquisition module; the upper computer module is sequentially connected with the working condition simulation module, the signal adaptation unit and the ECU to be tested, the signal acquisition module is respectively connected with the upper computer module and the signal adaptation unit, and the camera module is respectively connected with the upper computer module and the ECU to be tested;
the upper computer module includes: the system comprises a database, a main control part and a data processing and visualization part; the main control part sets working condition data, adjusts the output of the working condition simulation module, the database part stores an ECU pin definition diagram and a detection report, and the data visualization part is used for receiving an output signal of the signal acquisition module and visualizing the data by using matplotlib; the signal adapting unit comprises a protection circuit, a voltage conversion circuit and a signal adapting module, wherein the protection circuit prevents the circuit from overloading, the voltage conversion circuit simulates different working conditions and sensors, and the signal adapting module detects ECUs of different types;
the method comprises the following steps:
step 1, collecting defect information of corrosion, cracking and sinking of the appearance of an ECU to be detected, and uploading the collected appearance defect information to an upper computer module;
step 2, determining pin definition of the ECU to be tested according to the type of the ECU to be tested, and adjusting the working mode of the signal adapting unit;
step 3, establishing an engine oil injection model and storing the engine oil injection model to an upper computer module;
step 4, setting the working condition information of the ECU to be tested, and inputting the output values of the analog sensors into an engine oil injection model to calculate the theoretical oil injection quantity;
step 5, the working condition simulation module inputs a simulation sensor signal to the ECU to be tested;
step 6, a signal acquisition module acquires an oil injection signal output by the ECU to be detected to obtain actual oil injection quantity, and the actual oil injection quantity is compared with theoretical oil injection quantity to obtain an oil injection performance detection result;
step 7, monitoring a CAN communication signal generated by a communication module of the ECU to be tested by a signal acquisition module, and judging whether the communication module of the ECU to be tested is damaged or not;
and 8, integrating the appearance and the oil injection performance of the ECU to be detected and the detection result of the communication module into a detection report, displaying the detection report on a human-computer interaction interface of the upper computer module, uploading the detection report to a database, and finishing the detection.
2. The method for the automotive ECU return detection apparatus according to claim 1, characterized in that: the implementation of step 1 comprises:
step 1.1, acquiring an appearance image of an ECU to be detected through a camera module, and uploading the appearance image to an upper computer module;
step 1.2, extracting the appearance defects of the ECU to be detected by the upper computer module through the steps of image color space conversion, denoising, binarization and feature extraction;
and step 1.3, judging whether defects exist according to the appearance defect information.
3. The method for the automotive ECU return detection apparatus according to claim 1, characterized in that: the implementation of the step 2 comprises the following steps:
step 2.1, pin definition information of the ECU to be detected is obtained through database retrieval;
2.2, adjusting the working mode of the signal adapting unit according to the stitch definition information of the ECU to be tested; if the signal is defined as a sensor or a power supply, adjusting the working mode of the corresponding adaptation unit into an output mode; if the pin is defined as the output signal, the corresponding working mode of the adapting unit is adjusted to be the acquisition mode.
4. The method for the automotive ECU retrieval and utilization detection device according to claim 1, characterized in that: step 3, the establishment of the engine fuel injection model comprises the following steps:
step 3.1, establishing an engine fuel injection quantity model as follows:
q＝q b +q c +q Δ
wherein q is the total fuel injection quantity of the automobile, and q is b Based on the quantity of fuel injected, q c To correct the injected quantity, q Δ Is the increment of oil injection;
and 3.2, if the basic fuel injection quantity of the automobile is the fuel quantity required when the ideal air-fuel ratio is maintained, and the ideal air-fuel ratio is 14.7, the calculation formula of the basic fuel injection quantity of each cycle of the engine is as follows:
q b ＝14.7×q a /n e
wherein q is b The oil injection amount is the basic oil injection amount per cycle; q. q.s a Is the air flow rate; n is e Is the engine speed;
if the output value of the sensor of the external environment of the engine is not changed, the corrected fuel injection quantity is 0, namely q c ＝0；
And 3.3, introducing an acceleration gain coefficient, and regarding the acceleration and the fuel oil increment approximately as a linear relation, wherein the fuel oil increment is as follows:
q Δ ＝k×a×14.7×q a /n e
wherein a is the acceleration of the vehicle body; k is an acceleration gain coefficient, is related to the acceleration of the automobile, and is positive when the automobile accelerates and is negative when the automobile decelerates; the k value is obtained by fitting a data sample;
and 3.4, calculating an oil injection quantity model as follows:
q＝(1+ka)14.7×q a /n e 。
5. the method for the automotive ECU retrieval and utilization detection device according to claim 1, characterized in that: the implementation of the step 4 comprises the following steps:
step 4.1, the detection personnel sets working condition information, wherein the working condition information is the output value of each analog sensor;
and 4.2, outputting a signal by the working condition simulation module according to the set working condition information to enable the ECU to be tested to generate an oil injection signal.
6. The method for the automotive ECU retrieval and utilization detection device according to claim 1, characterized in that: the implementation of step 5 comprises:
step 5.1, simulating the output value of the air flow sensor to obtain air inflow, simulating the output value of the crankshaft position sensor to obtain the rotating speed of the engine, and simulating the output value of the acceleration sensor to obtain the acceleration information of the vehicle body;
and 5.2, inputting the information of the rotating speed, the air inflow and the acceleration of the engine into an engine oil injection model, and calculating the theoretical oil injection quantity of each cycle by the engine oil injection model.
7. The method for the automotive ECU return detection apparatus according to claim 1, characterized in that: the step 6 is realized by the following steps:
step 6.1, a signal acquisition module acquires an oil injection signal sent by the ECU to be tested, the oil injection signal is sent to an upper computer, the oil injection signal is processed through a data visualization part to obtain the actual oil injection quantity of each cycle, and the oil injection signal is displayed on an operation interface after being visualized;
and 6.2, comparing the actual fuel injection quantity with the theoretical fuel injection quantity, and if the difference between the actual fuel injection quantity and the theoretical fuel injection quantity is not greater than a threshold value, judging that the fuel injection performance of the ECU to be tested reaches the standard.
8. The method for the automotive ECU return detection apparatus according to claim 1, characterized in that: the implementation of step 7 comprises: and monitoring whether the ECU to be tested sends a frame start signal and a frame end signal by adopting a CAN bus detection method, and judging whether the communication module of the ECU to be tested is good or bad.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315209A (en) * | 2002-04-23 | 2003-11-06 | Toyoda Mach Works Ltd | On-vehicle electronic control unit and inspection device therefor |
| CN103353755A (en) * | 2013-07-03 | 2013-10-16 | 上海交通大学 | Automatic detection device for electronic control module of engine of end-of-life automobile and detection method |
| CN208203421U (en) * | 2018-03-12 | 2018-12-07 | 湖南工程学院 | A kind of hand-held repair apparatus of simulated automotive and engineering machine vehicle ECU signal |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4403945B2 (en) * | 2003-12-19 | 2010-01-27 | 株式会社デンソー | Inspection method, inspection apparatus and inspection program for control program |
| CN102117068B (en) * | 2009-12-22 | 2013-03-13 | 天津大学 | Device for automatically scanning control parameter of electric control engine |
| CN203397151U (en) * | 2013-08-16 | 2014-01-15 | 上海交通大学 | Lossless high-efficiency detector for ECU (Electronic Control Unit) of retired automobile engine |
| CN104090570A (en) * | 2014-07-24 | 2014-10-08 | 武汉市菱电汽车电子有限责任公司 | Function test device for electronic control unit of automobile electronic fuel injection system and method thereof |
| CN205067378U (en) * | 2015-11-10 | 2016-03-02 | 厦门理工学院 | Five metals work piece detecting system |
| CN106681308A (en) * | 2017-01-26 | 2017-05-17 | 吴神培 | Method and system for detecting ECU (electronic control unit) of vehicle |
| KR20190010055A (en) * | 2017-07-20 | 2019-01-30 | (주)서현테크놀로지 | A Signal Simulator for Detecting an Operation of a Automobile Element |
| CN108762243A (en) * | 2018-07-04 | 2018-11-06 | 天津英创汇智汽车技术有限公司 | A kind of ECU functional tests platform and ECU function test methods |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003315209A (en) * | 2002-04-23 | 2003-11-06 | Toyoda Mach Works Ltd | On-vehicle electronic control unit and inspection device therefor |
| CN103353755A (en) * | 2013-07-03 | 2013-10-16 | 上海交通大学 | Automatic detection device for electronic control module of engine of end-of-life automobile and detection method |
| CN208203421U (en) * | 2018-03-12 | 2018-12-07 | 湖南工程学院 | A kind of hand-held repair apparatus of simulated automotive and engineering machine vehicle ECU signal |
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