JPH01135372U

JPH01135372U -

Info

Publication number: JPH01135372U
Application number: JP2876788U
Authority: JP
Priority date: 1988-03-04
Filing date: 1988-03-04
Publication date: 1989-09-18

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の要部のブロツク図
、第２図は本考案の一実施例のブロツク図、第３
図は本考案の一実施例の概略図、第４図は本考案
の一実施例の指針の動きを説明するための図、第
５図は交差コイル式計器の一例の概略図、第６図
は交差コイル式計器の一例の駆動信号の一例の波
形図である。１……指針、２……指針軸、３……永久磁石、
４，５……コイル、１３……波形整形回路、１４
……周波数カウント回路、１５……帰零回路、１
６……正弦波変換回路、１７……ｓｉｎＸ駆動回
路、１８……ｃｏｓＸ駆動回路、１９……並列入
力並列出力シフトレジスタ、２０……ＮＯＴ論理
回路、２１……ＡＮＤ論理回路、２２……ＯＲ論
理回路、２３……シフトクロツク発生回路、２４
……ＮＯＲ論理回路。 Figure 1 is a block diagram of the main parts of an embodiment of the present invention, Figure 2 is a block diagram of an embodiment of the present invention, and Figure 3 is a block diagram of an embodiment of the present invention.
The figure is a schematic diagram of an embodiment of the present invention, Figure 4 is a diagram for explaining the movement of the pointer in an embodiment of the present invention, Figure 5 is a schematic diagram of an example of a crossed coil meter, and Figure 6 is a waveform diagram of an example of a drive signal of an example of a crossed coil type meter. 1...Pointer, 2...Pointer shaft, 3...Permanent magnet,
4, 5... Coil, 13... Waveform shaping circuit, 14
...Frequency count circuit, 15...Zero return circuit, 1
6... Sine wave conversion circuit, 17... SinX drive circuit, 18... CosX drive circuit, 19... Parallel input parallel output shift register, 20... NOT logic circuit, 21... AND logic circuit, 22... OR Logic circuit, 23...Shift clock generation circuit, 24
...NOR logic circuit.

Claims

[Claims for Utility Model Registration] A movable permanent magnet fixed to a pointer shaft, a plurality of coils arranged in an intersecting manner so as to surround the movable permanent magnet, and a pulse signal generated in accordance with a measured quantity to a predetermined amount. A count circuit that counts every time and outputs a digital signal according to the number of counts, and the digital signal is supplied from the count circuit, and the digital signal is different in phase from each other and has a level similar to a sine wave with respect to the electrical angle. A cross-coil type instrument comprising a drive signal supply circuit that separately supplies a plurality of drive signals to the plurality of coils with a plurality of drive signals having electrical angle levels that vary depending on the characteristics and correspond to the digital signal from the counting circuit. a voltage drop detection circuit that generates a return-to-zero signal when the voltage falls below a certain value; the return-to-zero signal from the voltage drop detection circuit and the digital signal from the count circuit are respectively supplied; supplying the drive signal as a value that rotates the value of the digital signal by approximately half of the rotation angle of the pointer from the current indicated position of the pointer to the reference indicated position of the pointer until the pointer returns to zero due to the entry of the pointer; A cross-coil type meter comprising a zero return circuit that supplies power to the circuit and gradually returns the pointer to zero.