JPH032805Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a contact type angle detection element.

In automatic control equipment or robots, it is necessary to obtain angle information of an object and control the angle. Particularly in a control system such as a robot that has many moving parts, the reliability of the detection element that obtains angle information as well as its size are important. Also, in terms of software such as a microcomputer, which is the head of a control device, it is desirable for the load on the hardware to be as low as possible in terms of processing speed and software development.

In Japanese Patent Application No. 57-139035, the present inventor proposed an angle detection element having a laminated structure in which a plurality of sheets having electrodes printed in a binary code array were laminated. This is an angle detection element that uses a slider to slide an electrode surface that forms the binary code array that appears by cutting or processing the laminate in the stacking direction, and the angle information is directly translated into the binary code. It has characteristics that can be obtained over time. Therefore, since the angle detection element can be directly connected to a control device such as a microcomputer, even in devices that require multiple detection functions, it is sufficient to have as many elements as there are detection parts, and conversion as an interface is possible. No circuitry is required.

However, since such a detection element is of a contact type, there is a method of increasing the reliability of electrical contact by making the structure of the slider a multi-point contact.

However, in the angle detecting element ₁₁ having a laminated structure like the previously proposed angle detecting element shown in FIG _.
Since the electrode length L is 150 μm and the electrode length L is 100 to 200 μm, it is structurally almost impossible to form the slider 13 in multi-point contact with one electrode 12.

Due to this situation, if you want to make multi-point contact, you can consider methods such as increasing the contact area of the slider in the sliding direction, but on the other hand, the resolution of the angle detection element cannot be made too high.

The present invention aims to eliminate these conventional problems and provide highly reliable angle detection of contact.

That is, the present invention is a block having at least one circular or arcuate surface and made of laminated insulators and conductors, wherein one circular or arcuate surface of the block has one or more circular or arcuate surfaces. The above conductor portions are exposed, and conductor terminals are formed on a different surface of the block to connect to each of the conductor portions, or a portion of each conductor portion is exposed. In an angle detection element characterized by a structure, a plurality of conductors are connected in the lamination direction and the circle so that a unique code appears in the lamination direction at each position in the circumferential direction of one circular or arcuate surface where the conductor is exposed. The present invention is an angle detection element characterized in that each conductor constituting a conductor array in a lamination direction that is arranged in the circumferential direction and represents the unique code is divided into a plurality of conductors.

Hereinafter, the present invention will be explained with reference to drawings showing one embodiment.

FIG. 2 is a perspective view of the contact portion of the angle detection element 21 showing an embodiment of the present invention.
In this case, one electrode 22 that obtains the same angle information is composed of two electrodes.

Therefore, the contact between the slider 23 and the angle detecting element is made up of two points, and it is clear that the reliability of the contact is higher than in the case of the conventional one-layer structure.

In the embodiment of the present invention, by printing an electrode pattern on a 100 μm green sheet, the interval W ₃ of one electrode 22 that obtains the same angle information is set to 110 μm (including the shrinkage rate during firing), and from this center to the next The distance W ⁴ between the center and the pair of electrodes 24 for obtaining different angle information, which are arranged in the layer 1 and 24, is set to 400 μm.

In this way, as shown in the present invention, the reliability of the angle detection element having a laminated structure is improved by using two or more electrodes that obtain the same angle information, so this is a major feature of the angle detection element. Angle control can be performed using a microcomputer without the need for an interface.

In the above embodiment, two electrodes having the same weight are used, but higher reliability can be obtained by using a plurality of three or more electrodes.

Further, in the above embodiment, one electrode that obtains the same angle information is provided in a continuous layer, but the arrangement order is not limited at all, and for example, 20 to 20
It is clear that each of the 27 electrode layers may be arranged one layer at a time, and then each of the 20 to 27 electrode layers may be arranged again.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a previously proposed angle detection element. FIG. 2 is a perspective view of an angle detection element showing an embodiment of the present invention. In the figure, 11... Angle detection element, 12...
Electrode with one weight, 13... Slider, 21...
...Angle detection element, 22...One electrode for obtaining angle information, 23...Slider, 24...An electrode with another weight.

Claims (1)

[Scope of utility model registration request] having at least one circular or arcuate surface,
A block formed by laminating an insulator and a conductor, in which one or more conductor parts are exposed within one circular or arc-shaped surface of the block, and a portion of the block that is different from that surface. In an angle detection element, a conductor terminal is formed to correspond to each of the conductor portions, or a portion of each conductor portion is exposed. A plurality of conductors are arranged in the lamination direction and the circumferential direction so that a unique code appears in the lamination direction at each position in the circumferential direction of the arc-shaped surface, and a conductor in the lamination direction that represents the unique code. An angle detection element characterized in that each conductor constituting the array is divided into a plurality of conductors.