To detect a short-circuit abnormality of a communication line in a mode in which a short-circuit state occurs intermittently.SOLUTION: There is provided a communication abnormality detection device (10) according to the present invention of a communication system that performs communication on the basis of a potential difference between paired communication lines. The communication abnormality detection device according to the present invention includes a determination unit (110) that determines whether a pair of communication lines is short-circuited at every predetermined cycle, a counter update unit (112) that increments a first counter value by a first predetermined value when the determination unit determines that there is a short-circuit state at every predetermined cycle, and increments a second counter value by a second predetermined value when the determination unit determines that there is no short-circuit state, a short-circuit abnormality detection unit (116) that detects a short-circuit abnormality of the pair of communication lines when the first counter value exceeds a first threshold value equal to or higher than a first predetermined value, and a reset unit (114) that resets the first counter value when the second counter value exceeds a second threshold value equal to or higher than the second predetermined value.SELECTED DRAWING: Figure 4
【課題】本発明の課題は、短絡状態が断続的に発生するモードの通信線の短絡異常を検出することである。【解決手段】本発明は、対の通信線の電位差に基づいて通信を行う通信システムにおける通信異常検出装置(10)に関する。本発明による通信異常検出装置は、対の通信線の短絡状態の有無を所定周期ごとに判定する判定部(110)と、所定周期ごとに、判定部により短絡状態があると判定された場合に、第1カウンタ値を第1所定値だけインクリメントし、判定部により短絡状態がないと判定された場合に、第2カウンタ値を第2所定値だけインクリメントするカウンタ更新部(112)と、第1カウンタ値が、第1所定値以上の第1閾値を超えた場合に、対の通信線の短絡異常を検出する短絡異常検出部(116)と、第2カウンタ値が、第2所定値以上の第2閾値を超えた場合に、第1カウンタ値をリセットするリセット部(114)と、を備える。【選択図】図4
COMMUNICATION ABNORMALITY DETECTION DEVICE
通信異常検出装置
2020-12-03
Patent
Electronic Resource
Japanese
IPC: | H04B TRANSMISSION , Übertragung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr |
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