JPS6454814A - Magnetic proximity switch - Google Patents

Magnetic proximity switch

Info

Publication number
JPS6454814A
JPS6454814A JP21090987A JP21090987A JPS6454814A JP S6454814 A JPS6454814 A JP S6454814A JP 21090987 A JP21090987 A JP 21090987A JP 21090987 A JP21090987 A JP 21090987A JP S6454814 A JPS6454814 A JP S6454814A
Authority
JP
Japan
Prior art keywords
detected
oscillation
detecting
digital value
changes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21090987A
Other languages
Japanese (ja)
Inventor
Toshikazu Kamiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Industrial Devices SUNX Co Ltd
Original Assignee
Sunx Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunx Ltd filed Critical Sunx Ltd
Priority to JP21090987A priority Critical patent/JPS6454814A/en
Publication of JPS6454814A publication Critical patent/JPS6454814A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To eliminate the variance of detecting sensitivity at every product, by counting the number of oscillatory output signals from first and second oscillation circuits by a counter means, and performing a processing hereafter in a digital way. CONSTITUTION:When an object to be detected approaches and is positioned in a high frequency magnetic field by a detecting coil 3, the inductance of the detecting coil 3 changes by inducing an eddy current in the object to be detected, and the oscillation frequency of the oscillation circuit 1 setting the detecting coil 3 as an oscillation element changes. Meanwhile, the oscillation circuit 7 continues oscillation by a preset frequency even when the object to be detected approaches. Therefore, a detection digital value D1 outputted from the counter means according to the approach of the object to be detected changes, however, a reference digital value D2 remains unchanged. And when relation between the detection digital value D1 and the reference digital value D2 is set at a prescribed state, a detection signal is outputted from an arithmetic means 11, then, the detecting state of the object to be detected is set. In such a way, it is possible to eliminate the variance of the detecting sensitivity at every product.
JP21090987A 1987-08-25 1987-08-25 Magnetic proximity switch Pending JPS6454814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21090987A JPS6454814A (en) 1987-08-25 1987-08-25 Magnetic proximity switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21090987A JPS6454814A (en) 1987-08-25 1987-08-25 Magnetic proximity switch

Publications (1)

Publication Number Publication Date
JPS6454814A true JPS6454814A (en) 1989-03-02

Family

ID=16597074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21090987A Pending JPS6454814A (en) 1987-08-25 1987-08-25 Magnetic proximity switch

Country Status (1)

Country Link
JP (1) JPS6454814A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714219A (en) * 1980-06-30 1982-01-25 Omron Tateisi Electronics Co Proximity switch
JPS62159913A (en) * 1985-12-28 1987-07-15 バルタ−　リンク Non-contact proximity switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714219A (en) * 1980-06-30 1982-01-25 Omron Tateisi Electronics Co Proximity switch
JPS62159913A (en) * 1985-12-28 1987-07-15 バルタ−　リンク Non-contact proximity switch

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