KR-102964329-B1 - Method And Apparatus For Automatic Detection And Verification Of Vehicle Communication Signal Voltage

KR102964329B1KR 102964329 B1KR102964329 B1KR 102964329B1KR-102964329-B1

Abstract

The present specification relates to a vehicle communication signal detection and verification device for automatically measuring and verifying recessive state voltages and dominant state voltages of a vehicle communication signal, and a method performed by the same. The automatic vehicle communication signal voltage detection and verification method comprises: a step in which the vehicle communication signal detection and verification device remotely receives a waveform of a vehicle communication signal from a vehicle communication signal measuring instrument; a step in which the vehicle communication signal detection and verification device processes the received waveform and converts it into a voltage data table; a step in which the vehicle communication signal detection and verification device interprets the voltage data table to detect the start and end points of a communication signal frame; a step in which the vehicle communication signal detection and verification device analyzes the voltage values of the sections of the communication signal frame through statistical processing including average value calculation, and classifies them into recessive sections and dominant sections based on the average voltage; and a step in which the vehicle communication signal detection and verification device calculates the voltage values of each classified section by median value calculation to determine a representative voltage representing each section. The vehicle communication signal detection and verification device may include the step of identifying a slope section of a waveform at the transition point between the dominant section and the inferior section and excluding the corresponding section; the step of the vehicle communication signal detection and verification device calculating a final inferior state voltage and a final dominant state voltage using the voltage value excluding the slope section; and the step of the vehicle communication signal detection and verification device verifying the suitability of the calculated voltage value by comparing it with a voltage value according to international standard specifications.

Inventors

김대준
박현상
박상희
최훈식

Assignees

비티에스테크놀로지스(주)

Dates

Publication Date: 20260513
Application Date: 20251022

Claims (12)

A method performed by a vehicle communication signal detection and verification device for automatically measuring and verifying the recessive state voltage and dominant state voltage of a vehicle communication signal, The above vehicle communication signal detection and verification device remotely receives the waveform of a vehicle communication signal from a vehicle communication signal measuring instrument; A step in which the vehicle communication signal detection and verification device processes the received waveform and converts it into a voltage data table; A step in which the vehicle communication signal detection and verification device interprets the voltage data table to detect the start and end points of a communication signal frame; A step in which the vehicle communication signal detection and verification device analyzes the voltage value of a section of the communication signal frame through statistical processing including the calculation of an average value, and classifies it into a recessive section and a dominant section based on the average voltage; A step of determining a representative voltage representing each section by calculating the voltage value of each classified section by the above vehicle communication signal detection and verification device through median value calculation; A step in which the vehicle communication signal detection and verification device identifies a slope section of the waveform at the transition point between the dominant section and the inferior section and excludes the corresponding section; A step in which the above vehicle communication signal detection and verification device calculates a final inferior state voltage value and a final dominant state voltage value using voltage values excluding the slope section; and The above vehicle communication signal detection and verification device is characterized by including a step of verifying suitability by comparing the calculated final inferior state voltage value and the final superior state voltage value with voltage values according to international standard specifications. Automatic detection and verification method for vehicle communication signal voltage.
In Article 1, The step of remotely receiving the waveform of the above vehicle communication signal is, The above vehicle communication signal detection and verification device is characterized by the step of receiving the waveform of the vehicle communication signal from the vehicle communication signal measuring instrument via a network protocol or file transfer format. Automatic detection and verification method for vehicle communication signal voltage.
In Article 1, The step of determining the above representative voltage is, The above vehicle communication signal detection and verification device is characterized by the step of obtaining the above representative voltage through statistical calculation based on median value calculation. Automatic detection and verification method for vehicle communication signal voltage.
In Article 1, The step of identifying slope sections of the above waveform and excluding the corresponding sections is: The above vehicle communication signal detection and verification device is characterized by including the step of performing filtering for noise removal and applying a second derivative to the filtered voltage value to detect the point where the rate of change of the voltage slope decreases as the slope end point. Automatic detection and verification method for vehicle communication signal voltage.
In Article 1, The step of verifying the suitability mentioned above is, The above vehicle communication signal detection and verification device is characterized by a step of determining suitability by comparing the calculated final inferior state voltage value and the final superior state voltage value with a value obtained by adding a preset allowable error range to the voltage value according to international standard specifications. Automatic detection and verification method for vehicle communication signal voltage.
In Article 5, The step of determining the suitability above is, The above vehicle communication signal detection and verification device is characterized by including a step of determining whether a phenomenon of instantaneous sudden fluctuation of voltage occurs when the final inferior state voltage value and the final superior state voltage value deviate from the preset allowable error range. Automatic detection and verification method for vehicle communication signal voltage.
A vehicle communication signal detection and verification device for automatically measuring and verifying the recessive state voltage and dominant state voltage of a vehicle communication signal, A waveform receiving and data conversion unit that remotely receives the waveform of a vehicle communication signal from a vehicle communication signal measuring instrument and converts it into a voltage data table; A data interpretation and voltage calculation unit that interprets the above voltage data table to detect the start and end points of a communication signal frame, classifies inferior and superior sections based on the average voltage, and calculates the voltage value of each classified section by calculating the median; A section identification and voltage calculation unit that identifies a slope section of a waveform at the transition point between the above-mentioned inferior section and superior section, and calculates a final inferior state voltage value and a final superior state voltage value using voltage values excluding the identified slope section; and Characterized by including a verification unit that verifies suitability by comparing the calculated final inferior state voltage value and the final superior state voltage value with voltage values according to international standard specifications. Automatic detection and verification device for vehicle communication signal voltage.
In claim 7, the waveform receiving and data conversion unit is, Characterized by receiving a waveform from the vehicle communication signal measuring instrument via a network protocol or file transfer format, Automatic detection and verification device for vehicle communication signal voltage.
In claim 7, the data interpretation and voltage calculation unit is, Characterized by determining the representative voltage of each classified section by calculating the median value of the voltage values of each section. Automatic detection and verification device for vehicle communication signal voltage.
In claim 7, the above-mentioned section identification and voltage calculation unit is, Characterized by performing filtering for noise removal and applying a second derivative to the filtered voltage value to detect the point where the rate of change of the voltage slope decreases as the slope end point. Automatic detection and verification device for vehicle communication signal voltage.
In claim 7, the verification unit is, Characterized by determining suitability by comparing the calculated final inferior state voltage value and the final superior state voltage value with a value obtained by adding a preset tolerance range to the voltage value according to international standard specifications. Automatic detection and verification device for vehicle communication signal voltage.
In claim 11, the verification unit is, Characterized by determining whether a phenomenon of instantaneous sudden fluctuation in voltage occurs when the above-mentioned final inferior state voltage value and the above-mentioned final superior state voltage value deviate from the above allowable error range. Automatic detection and verification device for vehicle communication signal voltage.

Description

Method and Apparatus for Automatic Detection and Verification of Vehicle Communication Signal Voltage This specification relates to a technology for automatically measuring and verifying the recessive and dominant voltages of ISO CAN/CANFD signals, which are vehicle communication standards. Conventionally, testers manually measured the voltage of CAN/CANFD signals using an oscilloscope and verified the results by comparing them with ISO standard voltage specifications. This process required a significant amount of time and repetition, and there was a high possibility of operator-dependent errors. Therefore, there is a need for a technology that automatically detects signal voltages from remote measurement data and performs statistical analysis to quickly and accurately verify compliance with ISO standards. The above description is intended solely to aid in understanding the background technology regarding the technical concepts of the present invention, and therefore, it should not be understood as prior art known to those skilled in the art of the present invention. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention along with specific details for implementing the invention; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. Figure 1 shows the state in which a moving average filter is applied to the detected voltage waveform. Figure 2 shows the state in which a Kalman Filter is applied to the detected voltage waveform. Figure 3 shows the point where the rate of change decreases automatically measured by applying a second derivative to the value obtained by applying a moving average filter to the sample voltage. Figure 4 is an example image showing the slope section of the dominant voltage presented in the present invention being automatically identified and the minimum and maximum voltages being measured. FIG. 5 is a block diagram showing the overall configuration of the vehicle communication signal voltage automatic detection and verification device of the present invention. Figure 6 illustrates a flowchart of the automatic detection and verification method for vehicle communication signal voltage according to the present invention. The technology disclosed in this specification may be applied to the detection and verification of communication signals of an automobile. However, the technology disclosed in this specification is not limited thereto and may be applied to all devices and methods to which the technical concept of the technology can be applied. It should be noted that technical terms used in this specification are used merely to describe specific embodiments and are not intended to limit the scope of the technology disclosed herein. Furthermore, unless specifically defined otherwise in this specification, technical terms used in this specification shall be interpreted in the sense generally understood by those skilled in the art to which the technology disclosed herein belongs, and shall not be interpreted in an overly broad or overly narrow sense. Additionally, if a technical term used in this specification is an incorrect technical term that fails to accurately express the concept of the technology disclosed herein, it shall be understood as being replaced by a technical term that can be correctly understood by those skilled in the art to which the technology disclosed herein belongs. Furthermore, general terms used in this specification shall be interpreted according to their prior definitions or according to the context, and shall not be interpreted in an overly narrow sense. Terms including ordinal numbers, such as first, second, etc., as used in this specification may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings, provided that identical or similar components are given the same reference number regardless of the drawing symbols, and redundant descriptions thereof will be omitted. Furthermore, in describing the technology disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such descriptions could obscure the essence of the technology disclosed in this specification. Additionally, it should be noted that the attached drawings are intended merely to facilitate an understanding of the concept of the technology disclosed in this specification, and should not