JPS6373676U

JPS6373676U -

Info

Publication number: JPS6373676U
Application number: JP16815086U
Authority: JP
Priority date: 1986-11-04
Filing date: 1986-11-04
Publication date: 1988-05-17

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例によるループコイル
特性測定器の回路図、第２図はドライバ回路の回
路図、第３図はオシロスコープの画面の説明図で
ある。１…掃引発振回路、２…第１のバツフアアンプ
、３…電圧制御発振回路、４…ドライバ回路、５
…コンデンサ、６…検波整流回路、７…第２のバ
ツフアアンプ、８…電源部、９…水平軸出力端、
１０…垂直軸出力端、１１…ループコイル、１２
…オシロスコープ。 FIG. 1 is a circuit diagram of a loop coil characteristic measuring device according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a driver circuit, and FIG. 3 is an explanatory diagram of an oscilloscope screen. DESCRIPTION OF SYMBOLS 1...Sweep oscillation circuit, 2...First buffer amplifier, 3...Voltage controlled oscillation circuit, 4...Driver circuit, 5
... Capacitor, 6... Detection rectifier circuit, 7... Second buffer amplifier, 8... Power supply section, 9... Horizontal axis output end,
10... Vertical axis output end, 11... Loop coil, 12
…oscilloscope.

Claims

[Claims for Utility Model Registration] A sweep oscillation circuit that outputs a sawtooth wave; a horizontal axis output end that outputs the sawtooth wave to the horizontal axis of an oscilloscope; and an oscillation frequency that is determined by the sweep oscillation voltage of the sweep oscillation circuit. a voltage-controlled oscillator circuit in which the voltage-controlled oscillator circuit is controlled; a driver circuit that drives a loop coil to be measured connected in parallel with a capacitor at the oscillation frequency of the voltage-controlled oscillator circuit; and an oscilloscope that detects and rectifies the voltage generated across the loop coil. A loop coil characteristic measuring device comprising: a detection circuit that outputs to the vertical axis of the loop coil;