JPS58179594U

JPS58179594U - Correction circuit for time-voltage conversion circuit

Info

Publication number: JPS58179594U
Application number: JP7276282U
Authority: JP
Inventors: 面　真一; 蒲ケ原　弘
Original assignee: 日立電子エンジニアリング株式会社
Priority date: 1982-05-20
Filing date: 1982-05-20
Publication date: 1983-12-01
Also published as: JPH0229504Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はレーザビームを用いたトロリー線の摩耗量およ
び偏差量の測定装置を概略的に示す図、第２図ａないし
Ｃは同上装置によるトロリー線の摩耗量測定動作を説明
するための信号波形図、第３図はトロリー線の残存直径
の説明図、第４図はトロリー線の摺面幅に対する残存直
径の変化を示すグラフ、第５図は本考案による時間−電
圧変換回路の補正回路が適用されたトロリー線摩耗量測
定装置の一例を示すブロック図、第６図ａないしｅは同
上装置における時間−電圧変換誤差の補正　　　。動作を説明するための信号波形図である。１３・・・切換ゲート、１４・・・ランプ電圧発生器、
１５．１８・・・サンプル・ホールド回路、１７・・・
基準幅信号発生器、１９・・・基準電圧発生器、２０・
・・比較器、２１・・・カウント回路、２２・・・Ｄ／
Ａ変換器。Fig. 1 is a diagram schematically showing a measuring device for measuring wear amount and deviation amount of a trolley wire using a laser beam, and Fig. 2 a to C show signals for explaining the operation of measuring the wear amount of a trolley wire by the same device. A waveform diagram, Fig. 3 is an explanatory diagram of the remaining diameter of the trolley wire, Fig. 4 is a graph showing changes in the remaining diameter with respect to the contact width of the trolley wire, and Fig. 5 is a correction circuit of the time-voltage conversion circuit according to the present invention. A block diagram showing an example of a trolley wire wear measurement device to which the above-mentioned device is applied, and FIGS. 6a to 6e show correction of time-voltage conversion errors in the same device. FIG. 3 is a signal waveform diagram for explaining the operation. 13...Switching gate, 14...Lamp voltage generator,
15.18...Sample/hold circuit, 17...
Reference width signal generator, 19... Reference voltage generator, 20.
...Comparator, 21...Count circuit, 22...D/
A converter.

Claims

[Scope of utility model registration request]

Data including a detection signal from the detector and having signal parts and non-signal parts alternately is input, and the data is input to the lamp voltage generator.
generates a ramp voltage with a constant slope from the input point of the detection signal, and holds and outputs the ramp voltage at the end of the detection signal, thereby changing the time width of the detection signal in the data to the magnitude of the voltage. The time-voltage conversion circuit includes a reference width signal generator that periodically generates a reference width signal with a constant time width, and a ramp voltage generator that replaces the detection signal in the non-signal portion of the data. a switching gate for inputting the reference width signal string; a reference voltage generator for generating a reference voltage set in advance according to the time width of the reference width signal; A comparator that compares the lamp voltage at the end of each reference width signal with the reference voltage when input is input, and outputs a digital signal of 1 or 0 depending on whether the lamp voltage is large or small with respect to the reference voltage. , a counter circuit that counts down or counts up according to the digital value of the output signal of this comparator, and an analog signal obtained by D/A converting the output signal of this counter circuit to the lamp voltage generator. The lamp voltage is output to
A correction circuit for a time-voltage conversion circuit, comprising a D/A converter that controls the slope every time each reference width signal ends in each no-signal portion of the ≠-even.