Electrical product detection system and method for vehicle and storage medium thereof

Abstract

The invention relates to the field of automobile detection, in particular to an electrical product detection system and method for a vehicle and a storage medium, and the system comprises an input module which receives the input of a user and outputs a corresponding control signal; the resistance value adjusting module is used for receiving the control signal and adjusting the output resistance value; the current detection module is connected in series with the output end of the resistance value adjusting module so as to detect current, obtain current detection data and output the current detection data; the voltage detection module is connected to the resistance value adjusting module in parallel so as to detect voltage, obtain voltage detection data and output the voltage detection data; and the display module is used for receiving the current detection data and the voltage detection data and displaying the current detection data and the voltage detection data for a user to check. The method has the effect of improving the detection efficiency.

Description

Technical Field

[0001] The present application relates to the field of automobile testing, and in particular to a system and method for testing electrical products on a vehicle, and a storage medium thereof. Background Art

[0002] As the epitome of industry, although cars can be seen everywhere in our lives, they have very high technical content. With the booming new energy vehicle industry, the degree of digitalization of cars is also getting higher and higher. For example, electrical products such as motors, batteries, and a large number of sensors are required. Whether it is a vehicle-machine interaction system or intelligent driving assistance, a large number of lidar sensors, visual sensors and other sensors are required. In the production of complete vehicles or the research and development of vehicle-machine systems, all electrical products in the vehicle need to be tested and adapted. The current of motors and batteries is large. Even when the battery supports 3C and 4C fast charging, the current may reach hundreds of amperes, while the current used by the sensor is small, and the minimum may be only a few milliamperes.

[0003] In automobile current detection, multiple detection devices are usually required to detect large current and small current respectively. For example, 1ma-200ma is the detection range of one detection device, and 0.2A-50A is the detection range of another detection device. When in use, two devices need to be switched back and forth, which is very inconvenient. Summary of the Invention

[0004] In order to improve the problem that detecting electrical products on vehicles requires switching between two devices, which is very inconvenient, the present application provides a system, method and storage medium for detecting electrical products on vehicles.

[0005] This application provides a vehicle electrical product detection system that adopts the following technical solutions: A vehicle electrical product detection system comprising: Input module, receives user input and outputs corresponding control signals; a resistance adjustment module, receiving the control signal and adjusting the output resistance; A current detection module is connected in series to the output end of the resistance adjustment module to detect the current, obtain current detection data and output it; A voltage detection module is connected in parallel to the resistance adjustment module to detect the voltage, obtain voltage detection data and output it; The display module receives the current detection data and the voltage detection data and displays them for the user to view.

[0006] By adopting the above technical solution, the range switching is controlled by the input module, so that there is no need to switch back and forth between multiple instruments, which greatly improves the detection efficiency.

[0007] Optionally, the resistance adjustment module includes multiple transistors and multiple resistors, the collectors of the multiple transistors are connected in parallel as the input end of the resistance adjustment module, the emitters of the multiple transistors are connected in parallel as the output end of the resistance adjustment module, the resistors are connected in series to the emitters or collectors of the transistors, and the bases of the transistors receive the control signals.

[0008] By adopting the above technical solution, the on-off control of the resistor is performed through the transistor. If the resistor is on, it is connected in parallel to the resistor. The parallel connection of the resistors reduces the overall resistance. Multiple different resistors can be connected in parallel to achieve different overall resistances, thereby realizing the control of the range, which is convenient and quick.

[0009] This application provides a method for detecting electrical products on vehicles, which adopts the following technical solutions: A method for detecting electrical products on a vehicle, comprising: acquiring the control signal; Determining the output resistance value by using the control signal and a preset resistance adjustment threshold value; Acquire current data and voltage data through the output resistance; Determining current detection interval data and voltage detection interval data according to the output resistance and a preset detection interval threshold; Determine the current detection data based on the current data and the current detection interval data and output the current detection data; The voltage detection data is determined and outputted based on the voltage data and the voltage detection interval data.

[0010] By adopting the above technical solution, the range control can be achieved through the circuit, which is convenient and fast.

[0011] Optional, including: Get the initialization signal; Determine a maximum resistance value by using the initialization signal and the resistance adjustment threshold; Determine the control signal based on the maximum resistance and the resistance adjustment threshold and output the control signal; Determine maximum current interval data and maximum voltage interval data by using the maximum resistance value and the detection interval threshold; Determine interval test data by using the current data, the maximum current interval data, the voltage data, and the maximum voltage interval data; Determine the detection interval data by using the interval test data and the detection interval threshold; The control signal is determined and outputted according to the detection interval data, the detection interval threshold and the resistance adjustment threshold.

[0012] By adopting the above technical solution, a rough detection is first achieved through the maximum range of the safest maximum resistance value, and then adjusted to the corresponding small range for accurate detection. At the same time, automatic range adjustment is achieved, which is convenient and quick.

[0013] Optional, including: Determine conservative interval data by comparing the detection interval data with a preset protection threshold; The conservative interval data is used to replace the detection interval data in the calculation of the control signal, and the control signal is determined and outputted according to the conservative interval data, the detection interval threshold and the resistance adjustment threshold.

[0014] By adopting the above technical solution, a range with a higher resistance is selected to protect the instrument.

[0015] Optionally, determining the conservative interval data by comparing the detection interval data with a preset protection threshold includes: Determine the judgment interval data by comparing the detection interval data with a preset fluctuation threshold; Determine the fluctuation interval data by using the judgment interval data and the conservative interval data; New conservative interval data is determined by comparing the fluctuation interval data with the original conservative interval data, and the new conservative interval data is used to replace the original conservative interval data in the calculation of the control signal.

[0016] By adopting the above technical solution, the probability of fluctuations exceeding the measuring range and thus damaging the instrument is reduced, thereby further playing a protective role.

[0017] Optional, including: Get timing data; Acquire the current detection data and the voltage detection data through the timing data and a preset frequency threshold; Determining estimated resistance data using the current detection data, the voltage detection data, and the maximum resistance value; Determining estimated type data by using the estimated resistance data and a preset type threshold; Repeating to determine new estimated resistance data and new estimated type data; Determining repeated type data by using the new estimated type data, the original estimated type data, and a preset type quantity threshold; Determine complex calculation type data according to the repetition type data and the type threshold; Determine type fluctuation interval data by using the complex calculation type data and a preset type interval; Determine the maximum and minimum fluctuation data through a plurality of said types of fluctuation interval data; The interval test data is replaced by the maximum and minimum fluctuation data to participate in the calculation of the detection interval data.

[0018] By adopting the above technical solution, the range can be calculated more accurately.

[0019] This application provides a computer-readable storage medium that uses the following technical solution: A computer-readable storage medium stores a computer program capable of being loaded and executed by a processor and used in a method for detecting electrical products on a vehicle.

[0020] By adopting the above technical solution, the computer program is stored in a computer-readable storage medium.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Through range switching, there is no need to switch back and forth between multiple instruments, which greatly improves the detection efficiency.

[0022] 2. The range control is realized through the circuit, which is convenient and fast.

[0023] 3. Automatically adjust the measuring range, convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a module diagram of an electrical product detection system for a vehicle in an embodiment of the present application.

[0025] Figure 2 This is a circuit diagram highlighting the resistance adjustment module.

[0026] Figure 3 It is a flow chart of a method for detecting electrical products on a vehicle in an embodiment of the present application.

[0027] Figure 4 It is a flowchart of step S1 to step S15.

[0028] Figure 5 It is a flowchart of step S2 to step S26.

[0029] Figure 6 It is a flowchart of step S5 to step S54.

[0030] Figure 7 It is a flowchart of steps S54 to S58.

[0031] Explanation of the accompanying symbols: 1. Input module; 2. Resistance adjustment module; 3. Current detection module; 4. Voltage detection module; 5. Display module. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-7 This application is described in further detail.

[0033] The present application embodiment discloses a vehicle electrical product detection system. Figure 1 The electrical product detection system for vehicles includes an input module 1, a resistance adjustment module 2, a current detection module 3, a voltage detection module 4 and a display module 5. The input module 1 can be a button or a touch screen for the user to input instructions and convert the instructions into control signals and output them to the resistance adjustment module 2.

[0034] Reference Figure 1 and Figure 2 The current detection module 3 can be an ammeter or other instrument with a current detection function, the voltage detection module 4 can be a voltmeter or other instrument with a voltage detection function, the resistance adjustment module 2 includes a plurality of transistors and a plurality of resistors, the transistors are respectively named Q1, Q2, Q3 ... Qn, the number of resistors is the same as the number of transistors or even more, the resistors are respectively named R1, R2, R3 ... Rn, in this embodiment, the resistor R is connected in series between the electrical product under test and the current detection module 3, the resistor R1 is electrically connected to the collector of the transistor Q1 On the electrode, the other end of the resistor R1 is connected in parallel between the electrical product under test and the resistor R, the emitter of the transistor Q1 is connected in parallel between the resistor R and the current detection module 3, the base of the transistor Q1 receives the control signal, the voltage detection module 4 is connected in parallel between the resistor R1 and the two ends of the electrical product under test, the resistor R2 is electrically connected to the collector of the transistor Q2, the other end of the resistor R2 is connected in parallel to the resistor R1, the emitter of the transistor Q2 is connected in parallel to the emitter of the transistor Q1, the base of the transistor Q2 receives the control signal, and the same applies to the resistor Rn and the transistor Qn.

[0035] Reference Figure 1 and Figure 2 The display module 5 can adopt a display screen such as a digital screen or an electronic screen. The input module 1 and the display module 5 include a database and a processor. The database is used to store various threshold data, such as the detection interval threshold and the resistance adjustment threshold. The processor is used to receive the control signal, the current detection data and the voltage detection data, and then call the corresponding threshold data from the database, perform data processing and output. The processor outputs the control signal to control the high and low levels of the base of the transistor. The control signal can also be amplified by an operational amplifier and then output to the base of the transistor for high and low levels.

[0036] A processor can include a central processing unit (CPU) or MPU, or a host system built around a CPU or MPU, including both hardware and software. Once a meter is equipped with a processor, people can freely control the metering instrument through programming, making it operate as desired. The processor can control local measurement transmission, remote measurement transmission, and remote communication through internal protocols. Internal protocols broadly refer to all protocols that enable intercommunication or links within the same metering instrument or system, including some or all of the following: human-computer interaction protocols, software / hardware (interface) protocols, chip bus (C-Bus) protocols, and internal bus (I-Bus) protocols. With the advancement of integrated circuit technology, some protocols that were considered external bus (E-Bus) protocols have also become internal protocols after the external bus (E-Bus) has been integrated into the chip.

[0037] The implementation principle of an electrical product detection system for vehicles in an embodiment of the present application is as follows: when it is necessary to detect electrical products in a car, the measurement range to be adjusted is input through the input module 1, and the input module 1 outputs a control signal to the transistor, thereby controlling the on and off of the resistor. According to the different resistance values ​​and numbers of resistors connected in parallel to the resistor R, the overall resistance is changed, and then the electrical product to be tested is connected, and detection is performed through the current detection module 3 and the voltage detection module 4, and finally displayed through the display module 5.

[0038] The present application embodiment discloses a method for detecting electrical products on a vehicle. Figure 3 , the electrical product testing method for vehicles includes the following steps: S1, obtain control signal; S11, determining the output resistance value through the control signal and the preset resistance adjustment threshold; S12, obtaining current data and voltage data by outputting resistance values; S13, determining current detection interval data and voltage detection interval data by outputting the resistance value and a preset detection interval threshold; S14, determining and outputting current detection data based on the current data and the current detection interval data; S15. Determine voltage detection data based on the voltage data and the voltage detection interval data and output the data.

[0039] In detail: the control signal is the measurement range to be adjusted input by the user, and the resistance adjustment threshold is the resistance value corresponding to the measurement range. For example, if the measurement range needs to be adjusted to 1mA-100mA, the corresponding resistance value needs to reach 1kΩ. If the measurement range needs to be adjusted to 1A-20A, the corresponding resistance value needs to reach 100Ω. This resistance value is the output resistance. The overall resistance is adjusted to the specified resistance value through the transistor, that is, adjusted to the resistance value represented by the output resistance. Then, the current detection module 3 and the voltage detection module 4 are used to detect and obtain current data and voltage data. The current data and voltage data here are not directly displayed to the user, so they are not current detection data and voltage detection data; the detection interval threshold is the detection interval corresponding to the resistance value. For example, if the resistance value reaches 100Ω, it means that the measurement range is 1A-20A, which is the current detection interval data, and the same applies to the voltage detection interval data. At this time, combined with the current data, the current current can be obtained, that is, the current detection data is obtained, and the same applies to the voltage detection data.

[0040] Reference Figure 4 , further comprising the following steps: S2. Get the initialization signal; S21, determining the maximum resistance value through the initialization signal and the resistance adjustment threshold; S22, determining a control signal based on the maximum resistance and the resistance adjustment threshold and outputting the signal; S23, determining the maximum current interval data and the maximum voltage interval data according to the maximum resistance value and the detection interval threshold; S24, determining interval test data based on current data, maximum current interval data, voltage data, and maximum voltage interval data; S25, determining the detection interval data by using the interval test data and the detection interval threshold; S26 , determining and outputting a control signal based on the detection interval data, the detection interval threshold, and the resistance adjustment threshold.

[0041] In detail: The initialization signal is a reset signal before testing a new electrical product. It is usually output after an electrical product is tested and disconnected, and before it is powered on again. When the initialization signal is received, the maximum value within the resistance adjustment threshold is taken, which is the maximum resistance value. The corresponding control signal is then obtained by substituting the resistance adjustment threshold into the resistance adjustment threshold and output to adjust the resistance value. At the same time, the maximum resistance value is combined with the detection interval threshold to obtain the corresponding current detection interval and voltage detection interval at this time, that is, the maximum current interval data and the maximum voltage interval data. The detected current data and voltage data are then substituted into the maximum current interval data and the maximum voltage interval data to obtain specific, displayable current and voltage values. This is the interval test data. For example, if the current data is at one twentieth of the full range, but the range is unknown, the maximum current interval data needs to be substituted. If the maximum current interval data is 50A, the specific representation of the current data is 50 / 20=2.5A. This is the current portion of the interval test data, also known as the current detection data. The same is true for the voltage portion. The interval test data is then compared with the detection interval threshold to obtain the interval test data. The value of the data belongs to which range. For example, if the current detection data is 2.5A, the detection interval threshold of the current part is ([1ma, 100ma], [100ma, 500ma], [0.1A, 16A], [16A, 50A]), then the best range at this time should be [0.1A, 16A], which is the third gear range. However, this is only the best range interval for current. If the voltage detection data is 30V, the detection interval threshold of the voltage part is ([1mV, 100mV], [100mV, 500mV], [0 .1V, 16V], [16V, 50V]), it means that the optimal voltage range is [16V, 50V], which is the fourth gear range, and the third gear range and the fourth gear range correspond to different resistance values. Therefore, if a smaller resistance value is selected, the current detection module 3 or the voltage detection module 4 may exceed the limit, so it is necessary to select the range interval corresponding to the larger resistance value, which is the detection interval data. Then, the corresponding control signal is obtained and output by combining the detection interval threshold and the resistance adjustment threshold, and the resistance is adjusted again to achieve more accurate measurement, that is, entering step S21.

[0042] Reference Figure 5 , further comprising the following steps: S3. Determine conservative interval data by comparing the detection interval data with a preset protection threshold; S31 , using conservative interval data to replace the detection interval data to participate in the calculation of the control signal, and determining and outputting the control signal through the conservative interval data, the detection interval threshold and the resistance adjustment threshold.

[0043] In detail: if the protection threshold is 1, it means that after the calculation of the detection interval data is completed, a higher resistance gear is taken. For example, the current of 2.5A is within the gear of [0.1A, 16A], but due to the existence of the protection threshold, the range of [16A, 50A] is taken to prevent the current fluctuation from exceeding the range. This is the conservative interval data. Then, the corresponding control signal is calculated and output in combination with the detection interval threshold and the resistance adjustment threshold. After adjusting the resistance, a more accurate measurement is performed again, that is, entering step S21.

[0044] Reference Figure 5 , further comprising the following steps: S4. Determine the judgment interval data by comparing the detection interval data with the preset fluctuation threshold; S41, determining the fluctuation interval data by judging the interval data and the conservative interval data; S42 , determining new conservative interval data by comparing the fluctuation interval data with the original conservative interval data, and replacing the original conservative interval data to participate in the calculation of the control signal.

[0045] In detail: the fluctuation threshold is the possible fluctuation of current. If the fluctuation threshold is set to 10%, and the detection interval data is multiplied by 10% to expand the interval range, the judgment interval data is obtained, and then compared with the conservative interval data. If the judgment interval data falls within the range of the conservative interval data, the data is safe, and the fluctuation interval data is obtained as it is. If the judgment interval data exceeds the range of the conservative interval data, it means that there is a risk, and the fluctuation interval data that needs to be further increased is obtained. At this time, the original conservative interval data is further increased to obtain the range interval of the next resistance gear as the new conservative interval data, and then steps S4-S41 are repeated again until the data is safe. This step is aimed at the excessive number of resistors and the excessive division of the gears, resulting in a small range difference between each adjacent gear. If a fluctuation occurs, it will exceed several ranges at once. At this time, even if the conservative interval data of the next gear is taken according to the protection threshold, it is not enough to ensure the safety of the instrument.

[0046] Reference Figure 6 and Figure 7 , further comprising the following steps: S5. Acquire timing data, and obtain current detection data and voltage detection data based on the timing data and a preset frequency threshold; S51, determining estimated resistance data based on current detection data, voltage detection data, and maximum resistance value; S52, determining estimated type data by using the estimated resistance data and a preset type threshold; S53, repeatedly determining new estimated resistance data and new estimated type data; S54, determining repeated type data by using the new estimated type data, the original estimated type data, and a preset type quantity threshold; S55, determining complex calculation type data by repeating type data and type threshold; S56, determining type fluctuation interval data by complex calculation type data and preset type interval; S57, determining the maximum and minimum fluctuation data based on multiple types of fluctuation range data; S58. Replace the interval test data with the maximum and minimum fluctuation data to participate in the calculation of the corresponding detection interval data.

[0047] In detail: The frequency threshold is the frequency of the detected current and voltage, that is, according to the timing data and the frequency threshold, the current detection data and the voltage detection data are continuously obtained, and the voltage detection data is divided by the current detection data to obtain the equivalent resistance, and then the maximum resistance is subtracted to obtain the approximate internal resistance of the electrical product under test, which is the estimated resistance data. Since this is detected under the maximum range, only an approximate value can be obtained, and the accuracy is insufficient; the type threshold is the different types of electrical products on the vehicle, corresponding to different internal resistances, and also includes the characteristics of various electrical products, such as the fluctuation curve of the motor after power-on, the fluctuation curve of the LED light after power-on, and other data. The estimated resistance data of the component is compared with the type threshold to obtain an approximate type range. For example, the internal resistance of electrical products such as motors and headlights includes the resistance represented by this estimated resistance data, so these are all estimated type data. Then, according to the timing data and the frequency threshold, new current detection data and voltage detection data are continuously obtained to calculate the new estimated type data. Continuously compare, keep those that are always consistent, and eliminate those that are different. For example, the first estimated type data is (motor, headlight, air conditioner), and the second estimated type data is (motor, headlight). Assuming the type quantity threshold is 2, it can be seen that the motor and the headlight are repeated and consistent, while the air conditioner is calculated for the second time, the estimated resistance data exceeds the resistance range corresponding to the air conditioner, and the number of types of the second estimated type data is two, which is within the range of the type quantity threshold, indicating that the estimated type data of the motor and the headlight are repeated type data; and the type threshold contains a characteristic curve, then the timing data and the frequency threshold are continuously calculated to obtain the resistance fluctuation curve, which is the complex calculation type data, and the type interval is the range interval corresponding to different types of electrical products, and then the range interval range is integrated to form a curve, which is the type fluctuation interval data, and then the maximum and minimum values ​​of the curve are taken, that is, the maximum and minimum fluctuation data, and substituted into step S25 and the detection interval threshold to obtain the corresponding detection interval data.

[0048] An embodiment of the present application discloses a computer-readable storage medium storing a computer program capable of being loaded and executed by a processor and used in a method for detecting electrical products on a vehicle.

[0049] Computer-readable storage media include, for example, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An electrical product detection system for a vehicle, characterized in that: include: An input module (1) receives user input and outputs corresponding control signals; A resistance adjustment module (2) receives the control signal and adjusts the output resistance; A current detection module (3) is connected in series to the output end of the resistance adjustment module (2) to detect the current, obtain current detection data and output it; A voltage detection module (4) is connected in parallel to the resistance adjustment module (2) to detect the voltage, obtain voltage detection data and output it; A display module (5) receives the current detection data and the voltage detection data, and displays them for viewing by a user.

2. The electrical product detection system for a vehicle according to claim 1, characterized in that: The resistance adjustment module (2) comprises a plurality of transistors and a plurality of resistors, the collectors of the plurality of transistors are connected in parallel as the input end of the resistance adjustment module (2), the emitters of the plurality of transistors are connected in parallel as the output end of the resistance adjustment module (2), the resistors are connected in series to the emitters or collectors of the transistors, and the bases of the transistors receive the control signals.

3. A method for detecting electrical products on a vehicle, using the electrical product detection system for a vehicle according to claim 2, characterized in that: include: acquiring the control signal; Determining the output resistance value by means of the control signal and a preset resistance adjustment threshold value; Acquire current data and voltage data through the output resistance value; Determine the current detection interval data and the voltage detection interval data by using the output resistance and a preset detection interval threshold; Determine the current detection data through the current data and the current detection interval data and output it; The voltage detection data is determined and outputted based on the voltage data and the voltage detection interval data.

4. A method for detecting electrical products on a vehicle according to claim 3, characterized in that: include: Get the initialization signal; Determine the maximum resistance value by using the initialization signal and the resistance adjustment threshold value; Determine the control signal according to the maximum resistance and the resistance adjustment threshold and output it; Determine maximum current interval data and maximum voltage interval data by using the maximum resistance value and the detection interval threshold; Determine interval test data by using the current data, the maximum current interval data, the voltage data and the maximum voltage interval data; Determine the detection interval data by using the interval test data and the detection interval threshold; The control signal is determined and outputted according to the detection interval data, the detection interval threshold and the resistance adjustment threshold.

5. The method for detecting electrical products on a vehicle according to claim 4, characterized in that: include: Determine conservative interval data by using the detection interval data and a preset protection threshold; The conservative interval data is used to replace the detection interval data to participate in the calculation of the control signal, and the control signal is determined and outputted according to the conservative interval data, the detection interval threshold and the resistance adjustment threshold.

6. A method for detecting electrical products on a vehicle according to claim 5, characterized in that: Determining conservative interval data by using the detection interval data and a preset protection threshold includes: Determine the judgment interval data by using the detection interval data and a preset fluctuation threshold; Determine the fluctuation interval data by using the judgment interval data and the conservative interval data; The new conservative interval data is determined by the fluctuation interval data and the original conservative interval data, and the new conservative interval data is used to replace the original conservative interval data to participate in the calculation of the control signal.

7. The method for detecting electrical products on a vehicle according to claim 4, characterized in that: include: Get timing data; Acquire the current detection data and the voltage detection data through the timing data and a preset frequency threshold; Determine estimated resistance data by using the current detection data, the voltage detection data and the maximum resistance value; Determine estimated type data by using the estimated resistance data and a preset type threshold; Repeating to determine new estimated resistance data and new estimated type data; Determine the repeated type data by using the new estimated type data, the original estimated type data and a preset type quantity threshold; Determine complex calculation type data by using the repetition type data and the type threshold; Determine type fluctuation interval data by using the complex calculation type data and a preset type interval; Determine the maximum and minimum fluctuation data through a plurality of fluctuation interval data of the type; The interval test data is replaced by the maximum and minimum fluctuation data to participate in the calculation of the detection interval data.

8. A computer-readable storage medium, characterized in that: The computer program is stored which can be loaded by a processor and execute the electrical product detection method for a vehicle according to any one of claims 3 to 7.

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