JPH0351698Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] The present invention is a planimeter with or without an integrating wheel, a kirubimeter, a coordinate measuring instrument, etc., which measure figures by rolling them over a surface on which the figure to be measured is written. Regarding equipment.

Conventionally, in such a planimeter device with an integrating wheel, the integral amount of area has been detected by rolling the integrating wheel provided on the measuring rod. Furthermore, in planimeters and coordinate measuring instruments that do not have an integrating wheel, detection in the X direction is performed by rolling the X detection wheel. However, these measuring wheels such as the integrating wheel or the X detection wheel cause slight changes in the measured values depending on the quality of the paper on which the figure is written and the friction condition of the paper surface. For example, if the paper is soft, the device may sink due to its own weight, and if the paper is slippery, errors may occur due to slipping of the wheels.

The present invention was developed to eliminate these drawbacks, and provides a figure measuring device in which a built-in computer calculates accurate figure measurement data based on the detection signal from the encoder that can adjust and correct the subtle errors mentioned above. It is something to do.

[Structure of the idea]

FIG. 1 is a plan view of a planimeter without an integrating wheel according to an embodiment of the present invention. Two X detection wheels 2 installed at both ends of the main body 1, which moves only in the X direction, detect the
Detect the amount of directional movement. A figure tracing device 5 is provided at the tip of a measuring rod 4, which is provided on the main body 1 to be rotated in the horizontal direction by a vertical shaft 3. In the case of a planimeter with an integrating wheel, an integrating wheel 6 is provided between the vertical axis 3 of the measuring rod and the figure tracing device 5 at the tip, as shown by the dotted line in Figure 1, to detect the integrated amount of area. As shown in the second and third figures, an encoder 8 is in contact with a friction plate 9 on the side surface of the contact measuring wheels such as the X detection wheel 2 or the integrating wheel 6, via a friction wheel 7. Alternatively, an X detection signal or an area integration signal corresponding to the amount of rotation of the integrating wheel 6 is output.

These detection signals are calculated and processed by a built-in computer together with the signal of the amount of rotation of the measuring rod to display the area of the figure to be measured, the length of the line, or the coordinates.

The friction wheel 7 and the encoder 8 move in the radial direction of the X detection wheel 2 or the integrating wheel 6 to detect the X
The contact position of the side surface of the detection wheel 2 or the integrating wheel 6 can be adjusted. For this purpose, the X detection vehicle 2
Alternatively, the X detection signal or Y detection signal of the encoder 8 can be adjusted for a constant rotation amount of the integrating wheel 6.

[Effects of the invention] As described above, according to the invention, by adjusting the contact position of the friction ring 7 according to the paper quality used for measurement or the friction state of the paper surface, it is possible to adjust the contact position of the friction ring 7 according to the paper quality used for measurement or the friction condition of the paper surface. This allows the computer to perform calculations using accurate input signals by correcting subtle errors caused by slippage.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an integral wheel type planimeter according to an embodiment of the present invention, and FIGS. 2 and 3 are contact configuration diagrams of the encoders of the X detection wheel and the integral wheel, respectively. 2...X detection wheel, 6...Integrator wheel, 7...Friction wheel, 8...Encoder.

Claims (1)

[Scope of utility model registration request] In the figure measuring device, an encoder is provided that contacts the side surface of a contact measurement wheel such as an X detection wheel or an integral wheel through a friction ring, and the position where the friction wheel contacts the side surface of the X detection wheel or integral wheel is determined as described above. A contact measuring wheel for a figure measuring device, characterized in that the side surface is adjustable in the radial direction.