JPH0299312U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1 to 6 are diagrams showing embodiments of the present invention. Figure 1 is a block diagram, Figure 2 is a timing diagram of switch operation, and Figure 3 shows the positional relationship between each coil and the core member. 4 is an external view of the displacement measuring device, FIGS. 5 and 6 are explanatory diagrams showing the relationship between error value and actual moving distance, and FIGS.
The figure is a diagram for explaining the conventional technology.
The figure is an external view of a conventional displacement measuring device, FIGS. 8 and 9 are schematic diagrams showing the positional relationship between each coil and the core member, FIG. 10 is a block diagram of a conventional displacement measuring device, and FIG. 11 is a schematic diagram showing the positional relationship between each coil and the core member. Similarly, FIG. 12, which is a circuit diagram of the oscillator, is an explanatory diagram showing the relationship between the amount of frequency change and the moving distance. 23... Contact, 25... Display, 26... Oscillator, 27... Transistor, 31... Primary coil, 32a, 32b... Secondary coil, 33a...
First switch, 33b...Second switch, 34...
... Core member, 35 ... Counter, 36 ... Arithmetic control section, 37 ... Storage section, 38 ... Timer.

Claims (1)

[Scope of utility model registration request] A contact element that comes into contact with the object to be measured, a core member connected to the contact element, and a coil inserted into the core member.As the core member moves within the coil, the oscillation frequency is changed. an oscillator whose oscillation frequency changes; a counter that counts the oscillation frequency of the oscillator; a moving distance calculating means that obtains the output of the counter and calculates the moving distance of the contact from the amount of change in the oscillating frequency; and the calculated moving distance. Further, the oscillator includes a plurality of coils into which a core member is inserted and arranged in the winding axis direction, and oscillates only a desired coil by appropriately selecting the plurality of coils. A displacement measuring device characterized by comprising a switch means for operating the device.