JPS5984917U

JPS5984917U - A device that automatically adjusts the frequency of a rod-shaped or plate-shaped piezoelectric resonator.

Info

Publication number: JPS5984917U
Application number: JP15344383U
Authority: JP
Inventors: レイモンド・ヒユグエニン; ヒユウバ−ト・マツゼイ; マ−シヤル・ボウマ−ド
Original assignee: ソシエテ・スイセ・ポ−ル・エル・インダストリ−・ホ−ロゲル・マネ−ジメント・サ−ビセス・エス・エ−
Priority date: 1975-09-12
Filing date: 1983-10-04
Publication date: 1984-06-08

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 the drawing]

第１図は本考案の原理を示すブロック図、第２図は本考
案の好適な態様を示すブロック略図である。１・・・・・・共振器、３・・・・・・電子回路、４・
・・・・・周波数比較器、５・・・・・・発振器、７・
・・・・・抵抗、８．９・・・・・・電圧比較器、１０
・・・・・・論理ブロック、１３．１３′・・・・・・
ノズル、１４・・・・・・砂供給器。FIG. 1 is a block diagram showing the principle of the present invention, and FIG. 2 is a block diagram schematically showing a preferred embodiment of the present invention. 1...Resonator, 3...Electronic circuit, 4.
... Frequency comparator, 5 ... Oscillator, 7.
...Resistance, 8.9 ...Voltage comparator, 10
...Logic block, 13.13'...
Nozzle, 14...Sand supply device.

Claims

[Scope of utility model registration request]

(1) A fixed support provided with electrical contacts for a rod-shaped or plate-shaped piezoelectric resonator, an excitation circuit capable of maintaining the resonator in a sustained state of resonance, and a frequency difference between the frequency of the resonator and the desired frequency. A measuring device comprising a comparator that measures and generates a voltage proportional to the difference; and a voltage divider comprising a capacitor that functions as a memory and two resistors connected in series, the voltage divider being connected in parallel to the terminals of the capacitor. and two voltage comparators that compare the voltage proportional to the frequency difference with the output of the voltage divider and the zero voltage, respectively, and a voltage converter controlled by the outputs of those two voltage comparators.
j& and a logic block for controlling the position of the associated switch; and at least one blowing nozzle acting sequentially on each of the two ends of the bar-shaped or plate-shaped piezoelectric resonator; 1. A device for automatically adjusting the frequency of a rod-shaped or plate-shaped piezoelectric resonator, comprising: a device for blowing abrasive controlled by a block;

(2) The apparatus according to claim 1, further comprising a circuit for measuring the adjustment speed and the adjustment frequency in order to compensate for the response time of the abrasive spraying device.