CN111623966B

CN111623966B - Silicon oil fan testing method with data interaction function

Info

Publication number: CN111623966B
Application number: CN202010351928.XA
Authority: CN
Inventors: 彭斯; 夏哲浩; 王宁; 都英
Original assignee: Dongfeng Male Thermal System Co ltd
Current assignee: Dongfeng Male Thermal System Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2022-05-03
Anticipated expiration: 2040-04-28
Also published as: CN111623966A

Abstract

The invention relates to a silicone oil fan testing method with a data interaction function, which comprises the following steps: standard import, fan identification and upload data. The testing equipment adopted by the invention is small and exquisite and easy to carry, does not need external testing equipment such as an ECU (electronic control Unit) and the like to be matched, can independently emit PWM (pulse-width modulation) signals, control the working state of the fan, and read the rotating speed of the fan in real time, is convenient for inspectors to test the function of the fan, is visual and rapid, and can greatly simplify the inspection process; meanwhile, data interaction can be carried out with a remote server, the latest test parameters are downloaded, and the test results are returned and stored, so that the test results are prevented from being lost.

Description

Silicon oil fan testing method with data interaction function

Technical Field

The invention relates to a silicone oil fan in a commercial vehicle engine cooling system, in particular to a silicone oil fan testing method with a data interaction function.

Background

On the commercial car platform at present, the engine heat dissipation is mainly accomplished through the silicone oil fan, its theory of operation: the torque of the engine is transmitted through the viscous force of the silicone oil, and the fan blades are driven to rotate so as to radiate heat of an engine radiator and an air conditioner condenser, and the fan is divided into an electric/temperature control silicone oil fan according to a working mode.

The solenoid in the electric control silicone oil fan is an electric control part: the ECU of the whole vehicle inputs PWM signals to the solenoid, the solenoid generates a changing magnetic field, and a control valve rod in the fan is attracted or opened, so that the silicon oil quantity in a working cavity of the fan is adjusted, and the rotating speed of the fan is finally adjusted; the Hall sensor in the solenoid can output 0/1 high and low levels to an ECU of the whole vehicle according to the change of the magnetic field intensity when the fan rotates; the ECU obtains the rotating speed of the fan according to an internal algorithm, and the rotating speed is used as a feedback signal to adjust the duty ratio of the input PWM voltage, so that closed-loop control is formed.

Compared with a temperature control fan, the electric control fan has the advantages of accurate control, quick response, low oil consumption and less emission, and is gradually favored by commercial vehicle factories; in the after-sale market, special troubleshooting software and a computer are needed for controlling the operation of the fan, and the whole vehicle factory, the fan factory, the ECU factory and the like are needed for common analysis, so that the time consumption is long, and more personnel are involved; because the ECU control parameters are frequently modified by the whole car factory, the test standard also needs to be correspondingly updated, so that the troubleshooting software also needs to be updated, and the updating of the troubleshooting software needs to complete a large amount of program design work matched with a computer; because different vehicle factories have different test standards, a large amount of different troubleshooting software is needed, after-sale personnel need to master a large amount of troubleshooting software use skills, and the software purchase cost is high; the existing test software does not have a data uploading function, and data is stored in test equipment and is often lost due to data overflow because the data cannot be exported in time; the existing troubleshooting software has no self-checking function, if a fault is found in the using process, the test is only stopped, and the fault is sent back to the original factory for maintenance, so that the time cost is higher.

Disclosure of Invention

In order to solve the problems, the invention provides a silicone oil fan testing method with a data interaction function, which can read the rotating speed of a fan in real time, is convenient for inspectors to test the function of the fan, is visual and rapid, and can greatly simplify the inspection process; and meanwhile, data interaction is carried out with a remote server, the latest test parameters are downloaded, and the test results are returned and stored, so that the test results are prevented from being lost.

The technical scheme adopted by the invention is as follows: a silicone oil fan testing method with a data interaction function is characterized by comprising the following steps: the method comprises the following steps:

(1) standard import: the server leads the new test standard into the MCU chip and covers the original test standard;

(2) fan identification: scanning a fan identification code, and storing the fan identification code into the MCU chip;

(3) testing the performance of the fan: firstly, carrying out resistance test, sending a test current to the fan by the MCU chip, and calculating the resistance value of the fan according to the output value of the test bridge module; then the MCU chip confirms whether the resistance value meets the qualified interval in the imported new test standard: if the voltage value is in accordance with the preset value, the MCU chip activates the PWM driving module, at the moment, a PWM signal is emitted, and then the output voltage test of the sensor or the actual rotating speed test of the fan is carried out; if the resistance value does not meet the preset resistance value, the MCU chip temporarily disables the PWM driving module and cannot transmit the PWM signal, judges that the fan resistance is unqualified and stores and displays the resistance value and the judgment result;

(4) uploading data: the test results of the resistance test, the sensor output voltage and the actual rotating speed of the fan are combined with the result of the previous code scanning and are uploaded to the server together, and the one-to-one correspondence between the test results and the fan identification is realized; the test results are stored in the MCU chip and are uploaded to the server after the test is finished; and in data interaction, the server sends a test result response packet to the equipment and calls the test result packet in the equipment to finish data uploading.

Preferably, in the step (1), in data interaction, the server sends an equipment parameter return packet instruction to call an equipment current parameter packet, and if parameters in the equipment current parameter packet are consistent with parameters in a set equipment parameter packet, the original test standard in the MCU chip is not covered; if the test standard is inconsistent with the original test standard, the MCU chip calls the parameters in the set equipment parameter packet through the application equipment parameter packet, and covers the original test standard to finish updating the new test standard.

Preferably, in the step (2), codes of different code systems are uniformly converted through the code scanning module, and are uniformly and finally converted into numbers to be stored in the MCU chip.

Preferably, in the step (2), if the fan identification code cannot be identified, the record is manually recorded.

Preferably, in the step (3), the testing process comprises a manual testing mode and an automatic testing mode, the automatic testing mode is defaulted after the vehicle is started, and if the silicone oil fan flange shaft is not connected with the engine of the whole vehicle, the manual testing mode is entered; and if the silicone oil fan flange shaft is connected with the whole vehicle engine, entering an automatic test mode.

Furthermore, in the manual test mode, firstly, an operator manually rotates the solenoid to cause the output voltage of the sensor to change, then the chip measures the actual output voltage through the voltage acquisition module, and finally the MCU chip compares the test result with a set value in a new test standard so as to judge whether the output voltage of the sensor is qualified.

Furthermore, in the automatic test mode, firstly, an operator needs to keep stepping on the accelerator to continuously input the rotating speed of the engine, then if the resistance value of the fan is qualified, the MCU chip activates the PWM driving module, at the moment, the operator clicks the keys according to screen indication to send PWM signals with different duty ratios so as to realize full meshing and idling operation of the fan, meanwhile, the MCU chip measures the output voltage of the sensor through the voltage acquisition module and calculates the rotating speed of the fan according to an internal algorithm, and the MCU chip compares the rotating speed test value of the fan with a set value in a new test standard so as to judge whether the rotating speed of the fan is qualified.

The beneficial effects obtained by the invention are as follows: the resistance value and the Hall sensor performance of the solenoid coil in the fan can be conveniently and rapidly tested, and the fan mainly has the following advantages:

1. the invention can be operated by a tester independently, and a remote analyzer analyzes the test result, thereby realizing cross-region cooperation and networked information transmission, greatly improving the test efficiency, reducing the personnel and time cost, and simultaneously using uniform test software and equipment to control and test the fan, and greatly reducing the cost.

2. The test standard in the server can be maintained and updated by special maintainers, and the real-time updating function of the invention ensures that the tester uses the new test standard, does not generate the condition of standard overdue or inapplicable, and better meets the test requirement of fast pace.

3. Different engine manufacturers have different requirements for fan functions (such as engagement or disengagement functions), so different test standards need to be set according to different engine systems, and different test standards can be set for different systems in the server; meanwhile, testers can select corresponding standards to perform fan detection, so that the invention is suitable for most mainstream engine platforms.

4. The function of 'scanning codes first and then uploading' of the invention realizes the one-to-one correspondence of the test data and the fan identification, which can prevent the test result from being overlooked by the tester and the loss of the test result, and greatly improves the safety of the data.

5. The invention has two detection modes of automatic and manual, the automatic mode corresponds to the field analysis of the fault vehicle, the manual mode corresponds to the 4S maintenance point or the analysis in the old warehouse, the application range is wide, the use is convenient and flexible, the detection and judgment time is saved, and the convenience is brought to the terminal vehicle owner.

6. The invention has the power-on self-checking function and stronger fault diagnosis capability, and when the fault occurs, the invention can ensure that the fault is discovered by a tester within the first time and the tester can replace new testing equipment in time.

Drawings

FIG. 1 is a schematic structural diagram of a test apparatus used in the present invention;

FIG. 2 is a schematic diagram of a test flow of the present invention;

FIG. 3 is an internal functional block of the test apparatus;

FIG. 4 is a diagram of packet types and call relationships;

FIG. 5 is a no length packet;

FIG. 6 is a packet with length;

reference numerals: 4.1, scanning the mark; 4.2, a manual test mode; 4.3, automatic test mode; 4.4, resistance testing; 4.5, measuring the output voltage of the sensor; 4.6, engine speed; 4.7, the rotating speed of the fan; 4.8, uploading data; 4.9, new test standard; 4.10, inputting a PWM signal;

5.1, a power supply module; 2. a wireless module; 5.3, MCU chip; 5.4, a code scanning module; 5.5, a voltage acquisition module; 5.6, a bridge test module; 5.7, a PWM driving module;

6.1, transmitting an identification packet; 6.2, setting an equipment parameter packet; 6.3, returning a packet by the equipment parameter; 6.4, testing result response packet; 6.5, a current parameter packet of the equipment; 6.6, applying for an equipment parameter package; 6.7, test result package.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments.

As shown in fig. 1-6, in the silicone oil fan testing method with a data interaction function of the present invention, a fan performance test is completed through a testing device (as shown in fig. 1) and a server, as shown in fig. 3, a power module 5.1, a wireless module 5.2, an MCU chip 5.3, a code scanning module 5.4, a voltage acquisition module 5.5, a bridge testing module 5.6, and a PWM driving module 5.7 are built inside the testing device.

The invention relates to a silicone oil fan testing method with a data interaction function, which comprises the following steps:

(1) standard import: as shown in fig. 2, after the test device is started, a new test standard 4.9 is automatically introduced, and the new test standard 4.9 is introduced into the MCU chip 5.3 through the wireless module 5.2 on the hardware and covers the original test standard; as shown in fig. 4, in the data interaction, the server sends an equipment parameter return packet instruction 6.3 to call the current parameter packet 6.5 of the equipment, if the parameters in the 6.5 and the set equipment parameter packet 6.2 are consistent, the standard in the chip 5.3 is not covered, if the parameters are not consistent, the 5.3 calls the parameters in the set equipment parameter packet 6.2 by applying the equipment parameter packet 6.6, and covers the original parameter standard (original test standard), so as to complete the update of the new test standard;

(2) fan identification: the hardware scans the fan identification code through a camera, uniformly converts codes of different code systems through a code scanning module 5.4, uniformly and finally converts the codes into numbers, and stores the numbers into an MCU chip 5.3;

(3) testing the performance of the fan: the testing process comprises a manual testing mode 4.2 and an automatic testing mode 4.3, the testing mode is defaulted to be the automatic testing mode after the testing device is started, the mode can be switched through an 'automatic' key on the testing device, the manual testing mode 4.2 is suitable for the situation that the fan is detached from the engine, and an operator needs to manually operate step by step to complete the testing of the fan resistance and the output voltage of the sensor, and the testing method is a static testing method; the automatic test mode 4.3 is suitable for the fan still in the engine system, and the real-time rotating speed of the fan is a dynamic test method when testing different engine rotating speeds;

both the manual test mode 4.2 and the automatic test mode 4.3 comprise a procedure for testing the fan resistance 4.4: an operator clicks a 'test' key on the test equipment, the MCU chip 5.3 sends test current to the fan through the power module 5.1, and the resistance value of the fan is calculated according to the output value of the test bridge module 5.6; then the MCU chip 5.3 confirms whether the resistance value meets the qualified interval in the imported new test standard 4.9: if the resistance meets the requirement, the MCU chip 5.3 activates the PWM driving module 5.7 to transmit a PWM signal, if the resistance does not meet the requirement, the MCU chip 5.3 temporarily disables the PWM driving module 5.7 and cannot transmit the PWM signal, and the MCU chip 5.3 judges that the fan resistance is unqualified; and finally, the MCU chip 5.3 stores the resistance value and the judgment result and displays the resistance value and the judgment result on the LED screen.

The manual test mode 4.2 comprises a process of testing the output voltage 4.5 of the sensor, firstly, an operator manually rotates a solenoid to cause the output voltage of the sensor to change, then the MCU chip 5.3 tests the actual output voltage 4.5 through the voltage acquisition module 5.5, and finally the MCU chip 5.3 compares a test result with a set value in a new test standard 4.9 so as to judge whether the output voltage of the sensor is qualified or not, and the judgment result is stored in the MCU chip 5.3 and displayed on an LED screen;

the automatic test mode 4.3 includes a process of testing the actual speed 4.7 of the fan, which will test the full engagement and idle speed of the fan, and in the future, if there are other speed requirements, the program in the MCU chip 5.3 may be modified. Firstly, an operator needs to keep stepping on an accelerator to continuously input the rotating speed of an engine to be 4.6, then if the resistance value of a fan is qualified, the MCU chip 5.3 activates the PWM driving module 5.7, at the moment, the operator clicks a key to send PWM signals 4.10 with different duty ratios according to screen indication so as to realize full meshing and idling operation of the fan, meanwhile, the MCU chip 5.3 measures the output voltage 4.5 of a sensor through the voltage acquisition module 5.5 and calculates the rotating speed of the fan according to an internal algorithm, the MCU chip 5.3 compares the test value of the actual rotating speed 4.7 of the fan with the set value in the new test standard 4.9 so as to judge whether the rotating speed of the fan is qualified, and the judgment result and the test result are stored in the MCU chip 5.3 and displayed on an LED screen;

(4) upload data 4.8: the test equipment has a result uploading function, wherein the test results of the resistance test 4.4, the sensor output voltage 4.5 and the actual fan rotating speed 4.7 are uploaded to the server together with the result of the previous scanning identifier 4.1, so that the test results are in one-to-one correspondence with the fan identifiers; test results on hardware are stored in the MCU chip 5.3 and are uploaded to a server through the wireless module 5.2 after the test is finished; on data interaction, the server sends a test result response packet 6.4 to the equipment, and meanwhile, the test result packet in the equipment is called, so that data uploading is completed.

The method comprises the following steps that after the test equipment is started, an automatic test mode is defaulted to 4.3, a latest test standard is introduced to 4.9, a 'scan' key is pressed firstly, fan identification scanning is carried out to 4.1, a scanning result is displayed on a screen according to a preset format, and if the identification code cannot be recognized within 5 seconds, scanning is finished; then connecting the test equipment with the solenoid of the fan, pressing a 'test' key, detecting the coil resistance (resistance test 4.4) and displaying the resistance value on a screen, and if the resistance value exceeds the range in the test standard, judging that the solenoid has a fault; if the standard range is met, performance testing of the Hall sensor is carried out (the output voltage of the sensor is measured by 4.5), a tester manually rotates the solenoid by taking the direction of the flange shaft as a rotating shaft, the change of the output voltage of the sensor is displayed on a screen, if the standard range is not met, the fault of the solenoid is judged, after the testing is finished, if scanning the identification code is successful, a testing result is uploaded according to screen display, if the identification code cannot be identified, the testing result cannot be uploaded, and the testing result needs to be manually recorded.

Referring to fig. 2, the invention can be connected to a solenoid connector of a fan when a silicone oil fan flange shaft is connected with a vehicle engine. After scanning the fan identification code, entering an automatic test mode 4.3, firstly testing the coil resistance (resistance test 4.4), if the resistance exceeds the range in the standard, judging the fan to be a fault part, and forbidding any PWM signal output to prevent misoperation of a tester; if the coil resistance is normal, a tester needs to adjust the rotating speed of the engine to be 4.6 to a set rotating speed and send a corresponding PWM signal to be 4.10 for automatic testing.

When the resistance of the detection coil (the resistance test is 4.4) is qualified, the word of ' output ' is displayed on the screen, a tester can input a PWM signal 4.10, wherein the frequency of the PWM signal can be adjusted through ' frequency delta ' and ' frequency v ' (the frequency delta key is pressed down, the frequency of the PWM signal can be improved, the range can be adjusted from 1HZ to 10HZ, 0.1HZ is increased every time the button is pressed, the power-off memory function is realized, the frequency delta key is pressed down, the frequency of the PWM signal can be reduced, the duty ratio is changed through ' PWM + ' PWM- ', the duty ratio of the PWM signal can be improved, the range can be adjusted from 0% to 100%, the button is increased by 5% every time, the power-off memory function is realized, the duty ratio of the PWM signal can be reduced through pressing down, the working state of the fan can be adjusted through simulating ECU to output the PWM signal, pressing the "test" key again will stop outputting the PWM signal and display the "stop" word on the screen.

The automatic test mode 4.3 is a multi-stage test, each stage needs to be matched with and input a corresponding PWM signal 4.10, if the test value of any stage does not accord with the standard value, the fan fault is judged, the test process is finished, if the test values accord with the standard value, the fan function is normal, and the automatic test mode 4.3 also has the code scanning uploading function.

Referring to fig. 3, the test equipment is externally connected with a silicone oil fan, and in an automatic test mode 4.3, a driving voltage can be sent to the silicone oil fan through a PWM driving module 5.7, and the fan is enabled to work in an engaged or separated state in combination with an input rotating speed of an engine. The test bridge module 5.6 can indirectly detect the fan internal coil resistance. The voltage acquisition module 5.5 can acquire the output voltage 4.5 of the hall sensor of the fan in the manual test mode 4.2 or the automatic test mode 4.3. The code scanning module 5.4 can accurately read the identification code of any fan by combining the camera, and adds the name to the test result of the fan. The wireless module 5.2 is responsible for interacting with the remote server, can read set standards and parameters in the server and can upload test results, and the power module 5.1 is responsible for supplying power to the whole invention, so that the test work can be conveniently carried out in a place without a power supply, and meanwhile, the wireless module can be externally connected with a charger for charging.

The MCU chip 5.3 is responsible for storing the set parameters and standards transmitted by the wireless module 5.2, feeding back the test result of the fan to the wireless module, transmitting a driving signal to the driving module 5.7, and recording the test results of 5.6 and 5.5 and the identification code scanned by the 5.4 module; the core unit processing chip is used for comparing the internal test result with the set parameters and judging whether the fan functions are normal or not, and is responsible for maintaining the normal operation of all functions of the fan.

The testing equipment communicates with the remote server through a TCP/IP protocol, a communication address and a port of the server need to be opened, related software needs to be customized in the server to be in butt joint with the testing equipment, and a database is established for storing a set value in a testing standard and each testing result.

The data packet related in the communication process of the test equipment and the server is set as follows:

referring to fig. 5 and fig. 6, the data packets are divided into length data packets and non-length data packets in format, the former is a data packet capable of transmitting specific information, the latter is mainly used for sending communication commands, and a general data packet may include the following fields: initial character, source address, destination address, packet type, xor and check bits, the packet with length additionally comprising: data Body length, data Body content.

As shown in fig. 4, the data packet is divided according to the home server side and the device side: the method is divided into a server data packet and a device data packet. Both have a transmission identification packet 6.1, which corresponds to an indication packet, which is transmitted when there is no communication between the server and the invention.

The server data packet includes: the parameter packet 6.2 is set to set parameters in the test standard and parameters in the test process, such as process parameters like sampling time. The parameter return packet 6.3 is a data packet without length, the parameter return packet 6.5 is returned after the parameter return packet 6.3 is received by the server, and the server can judge whether the parameter return packet is the latest standard or not through 6.3. The test result response packet 6.4 is a no-length data packet, and after being received, the invention returns a parameter packet 6.7 for uploading the test result.

The device packet includes: the device current parameter packet 6.5 is a data packet with length, is used for storing the device current test standard and the parameters in the process, and can be called by 6.3. The application equipment parameter packet 6.6 is a data packet without length, is used for calling the equipment parameter 6.2 in the server, and is equivalent to automatically importing the latest test standard when the server is started. The test result packet 6.7 is a data packet with a length, is used for recording the test result, can be called by 6.4, and is used for uploading the test result.

The foregoing shows and describes the general principles and principal structural features of the present invention. The present invention is not limited to the above examples, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A silicone oil fan testing method with a data interaction function is characterized by comprising the following steps: the method comprises the following steps:

(3) testing the performance of the fan: firstly, carrying out resistance test, sending a test current to the fan by the MCU chip, and calculating the resistance value of the fan according to the output value of the test bridge module; then the MCU chip confirms whether the resistance value meets the qualified interval in the imported new test standard: if the voltage value is in accordance with the preset value, the MCU chip activates the PWM driving module, at the moment, a PWM signal is emitted, and then the output voltage test of the sensor or the actual rotating speed test of the fan is carried out; if the resistance value does not meet the preset standard, the MCU chip temporarily disables the PWM driving module and cannot transmit the PWM signal, the MCU chip judges that the fan resistance is unqualified, and the MCU chip stores and displays the resistance value and the judgment result;

the testing process comprises a manual testing mode and an automatic testing mode, the automatic testing mode is defaulted after the vehicle is started, and if the flange shaft of the silicone oil fan is not connected with the engine of the whole vehicle, the manual testing mode is entered; if the silicone oil fan flange shaft is connected with the whole vehicle engine, entering an automatic test mode;

in the manual test mode, firstly, an operator manually rotates the solenoid to cause the output voltage of the sensor to change, then the chip measures the actual output voltage through the voltage acquisition module, and finally the MCU chip compares the test result with a set value in a new test standard so as to judge whether the output voltage of the sensor is qualified;

2. The silicone oil fan testing method with the data interaction function according to claim 1, characterized in that: in the step (1), in data interaction, the server sends an equipment parameter return packet instruction to call an equipment current parameter packet, and if parameters in the equipment current parameter packet are consistent with parameters in a set equipment parameter packet, the original test standard in the MCU chip is not covered; if the test standard is inconsistent with the original test standard, the MCU chip calls the parameters in the set equipment parameter packet through the application equipment parameter packet, and covers the original test standard to finish updating the new test standard.

3. The silicone oil fan testing method with the data interaction function according to claim 1, characterized in that: and (2) uniformly converting the codes of different code systems by the code scanning module, uniformly converting the codes into numbers finally, and storing the numbers into the MCU chip.

4. The silicone oil fan testing method with the data interaction function according to claim 1, characterized in that: and (3) in the step (2), if the fan identification code cannot be identified, manually recording.

5. A silicone oil fan testing method with a data interaction function is characterized by comprising the following steps: the method comprises the following steps:

in the automatic test mode, an operator keeps stepping on an accelerator to continuously input the rotating speed of the engine, then if the resistance value of the fan is qualified, the MCU chip activates the PWM driving module, at the moment, the operator clicks a key according to screen indication to send PWM signals with different duty ratios so as to realize full meshing and idling operation of the fan, meanwhile, the MCU chip measures the output voltage of a sensor through a voltage acquisition module and calculates the rotating speed of the fan according to an internal algorithm, and the MCU chip compares the rotating speed test value of the fan with a set value in a new test standard so as to judge whether the rotating speed of the fan is qualified or not;