JPS5497467A - Speed measuring apparatus of magnetic object - Google Patents
Speed measuring apparatus of magnetic objectInfo
- Publication number
- JPS5497467A JPS5497467A JP387478A JP387478A JPS5497467A JP S5497467 A JPS5497467 A JP S5497467A JP 387478 A JP387478 A JP 387478A JP 387478 A JP387478 A JP 387478A JP S5497467 A JPS5497467 A JP S5497467A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic object
- air core
- counter
- passing
- core coil
- 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
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
PURPOSE: To measure the moving speed of magnetic object accurately in non- contact state, without influences due to fluctuations of passing position, by passing the magnetic object to be measured through an air core coil.
CONSTITUTION: When the head of a magnetic object 9 enters an air core coil 1, the impedance of the coil 1 changes, so that the balance of a bridge 17 is broken. As a result, a detection signal (a) is supplied into an amplifier 4. In consequence, a monostable multivibrator 5 emits a measurement start pulse (d) to a counter 6. when the head of the magnetic object 9 reaches an air core coil 2 provided at a certain disance l, a measurement stop signal (e) is supplied to the counter 6 through the monostable multivibrator 5. An operator 8 reads the measured volue (c) sent from the counter 6, and calculates the time required for passing between air core coils 1, 2 from the clock period which is prelimiarily stored. Then, the speed of the object 9 is determined from the certain distance l, and is displayed in a display device 12.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP387478A JPS5497467A (en) | 1978-01-18 | 1978-01-18 | Speed measuring apparatus of magnetic object |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP387478A JPS5497467A (en) | 1978-01-18 | 1978-01-18 | Speed measuring apparatus of magnetic object |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5497467A true JPS5497467A (en) | 1979-08-01 |
Family
ID=11569323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP387478A Pending JPS5497467A (en) | 1978-01-18 | 1978-01-18 | Speed measuring apparatus of magnetic object |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5497467A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004354385A (en) * | 2003-05-28 | 2004-12-16 | Oerlikon Contraves Ag | Device and method for determining velocity in muzzle of projectile |
-
1978
- 1978-01-18 JP JP387478A patent/JPS5497467A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004354385A (en) * | 2003-05-28 | 2004-12-16 | Oerlikon Contraves Ag | Device and method for determining velocity in muzzle of projectile |
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