JPS6423666U

JPS6423666U -

Info

Publication number: JPS6423666U
Application number: JP11763687U
Authority: JP
Priority date: 1987-07-31
Filing date: 1987-07-31
Publication date: 1989-02-08

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図は従来の速度検出装置の構成を示
すブロツク図である。１ａ〜１ｄ……速度発電機（回転検出部）、２
……滑走検知装置（速度検出部）、３……主幹制
御部、１２，１７……比較回路（補助速度検出手
段）、１５……Ｆ／ＤＣ変換回路（補助速度検出
手段）、１１，１６……（補助速度検出手段）、
１３，１８，２１，２３……ダイオード（補助速
度検出手段）、Ｓａ，Ｓｂ……信号（運転状態信
号）。 FIG. 1 is a block diagram showing the configuration of an embodiment of this invention, and FIG. 2 is a block diagram showing the configuration of a conventional speed detection device. 1a to 1d...Speed generator (rotation detection section), 2
... Skidding detection device (speed detection section), 3 ... Main control section, 12, 17 ... Comparison circuit (auxiliary speed detection means), 15 ... F/DC conversion circuit (auxiliary speed detection means), 11, 16 ...(auxiliary speed detection means),
13, 18, 21, 23...Diode (auxiliary speed detection means), Sa, Sb...Signal (operating state signal).

Claims

[Claims for Utility Model Registration] (1) A rotation detection unit provided on each of a plurality of axles and outputting a signal corresponding to the number of rotations of the axle, and a rotation detection unit that outputs a signal corresponding to the number of rotations of the axle, and detects whether the vehicle is running with power, braking, or coasting. a master control unit that outputs a driving state signal indicating power running; and when the driving state signal indicates power running, detects the vehicle speed based on the smallest signal among the output signals of the rotation detecting parts, and when the driving state signal indicates braking. , when coasting is indicated, the vehicle speed is detected based on the largest signal among the output signals of the respective rotation detection parts;
A speed detection unit outputs a signal corresponding to the detected vehicle speed as a first vehicle speed signal, and if the first vehicle speed signal is not output or exceeds a predetermined reference value, an abnormality is detected. auxiliary speed detection for determining, creating a second vehicle speed signal based on the output signal of any one of the rotation detectors, and outputting the second vehicle speed signal in place of the first vehicle speed signal; A speed detection device comprising: means. (2) The auxiliary speed detection means is characterized in that when an abnormality is detected, the output path of the first vehicle speed signal is clamped or disconnected, thereby stopping the output of the first vehicle speed signal. A speed detection device according to claim 1 of the utility model registration claim. (3) The speed detection unit is configured to compare the detected vehicle speed with a reference value and output a first control signal corresponding to the comparison result, and the auxiliary speed detection unit is configured to compare the detected vehicle speed with a reference value and output a first control signal corresponding to the comparison result. The speed signal is compared with a predetermined reference value, a second control signal corresponding to the comparison result is generated, and the logical sum of the first and second control signals is calculated and output. A speed detection device according to claim 1 of the utility model registration claim.