JPS57200825A - Knock sensor - Google Patents

Knock sensor

Info

Publication number
JPS57200825A
JPS57200825A JP8630481A JP8630481A JPS57200825A JP S57200825 A JPS57200825 A JP S57200825A JP 8630481 A JP8630481 A JP 8630481A JP 8630481 A JP8630481 A JP 8630481A JP S57200825 A JPS57200825 A JP S57200825A
Authority
JP
Japan
Prior art keywords
knock sensor
bonding
bonding agent
filler
metallic
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.)
Granted
Application number
JP8630481A
Other languages
Japanese (ja)
Other versions
JPS642206B2 (en
Inventor
Katsuhiko Tanaka
Tomoji Fukaya
Katsuhiro Ishikawa
Masatoshi Suzuki
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.)
Denso Corp
Original Assignee
NipponDenso Co 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP8630481A priority Critical patent/JPS57200825A/en
Publication of JPS57200825A publication Critical patent/JPS57200825A/en
Publication of JPS642206B2 publication Critical patent/JPS642206B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To obtain the highly reliable knock sensor, when a piezoelectric bimorph element is bonded, by adding metallic powder filler in an insulating bonding agent, and performing the bonding so as to ensure the conducting point between the bonding surfaces. CONSTITUTION:In the bimorph element, electrode layers (c) are provided on both sides and piezoelectric porcelain plates 5a and 5b are bonded at a plane (e). In bonding, the metallic filler (f) is added in the bonding agent such as epoxy resin. Then the metallic filler (f) is distributed in a bonding agent layer (g). When the electrode layers (c) receive external stress, they are charged into opposite polarities to each other. The metallic filler (f) is conducted and the external output is generated. Said bimorph type vibrator is used as a vibrator 5 of the knock sensor. Therefore, electric combining property from the viewpoints of initial characteristics and durability can be ensured, and the highly reliable knock sensor can be obtained.
JP8630481A 1981-06-04 1981-06-04 Knock sensor Granted JPS57200825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8630481A JPS57200825A (en) 1981-06-04 1981-06-04 Knock sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8630481A JPS57200825A (en) 1981-06-04 1981-06-04 Knock sensor

Publications (2)

Publication Number Publication Date
JPS57200825A true JPS57200825A (en) 1982-12-09
JPS642206B2 JPS642206B2 (en) 1989-01-17

Family

ID=13883091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8630481A Granted JPS57200825A (en) 1981-06-04 1981-06-04 Knock sensor

Country Status (1)

Country Link
JP (1) JPS57200825A (en)

Also Published As

Publication number Publication date
JPS642206B2 (en) 1989-01-17

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