JPS61173111A - Inclination detector - Google Patents

Abstract

PURPOSE:To simplify and miniaturize a construction by providing a pair of electric resistance bodies at the position opposing each other of the above of an annular body and by projecting an electrode in the diameter direction from numerous isometric points to section isometrically these electric resistance bodies. CONSTITUTION:An inclination detecting element 11 winds in coil shape with the state of insulation covering the electric resistance bodies 14a, 14b having the electric resistance proportional to the respective length on the right and left semi-annular part which sections symmetrically to the right and left by the base line in the diameter direction the annular body 12 made by a thin plate. The numerous electrodes led out respectively from the insulation covering are provided at the isometric point to section isometrically the resistance bodies with being located at the inner side of the annular body 12 on the electric resistance bodies 14a, 14b and are projected for the center side of the annular body 12. When such inclination detector is inclined around the center axial line L, the number of electrodes to conduct in a pair of electric resistance bodies 14a, 14b varies and the inclination is detected from the resistance value. The construction is therefore simplified and can be miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a tilt angle detector for detecting the posture, etc. of an object.

[Prior Art] Various types of tilt angle detectors have been known that utilize bubbles sealed in a liquid. The angle of inclination is determined by detecting the angle of inclination, and the angle of inclination is determined by detecting the change in capacitance between bubbles and liquid. Although the angle of inclination is determined by changing in response to vertical movement, it is not suitable for detecting a large angle of inclination of about ±180°. In addition, in the detector using the above-mentioned conductive wire, if the water container is made smaller, the resistance value due to the movement of water becomes considerably smaller and errors occur, so the detector cannot be miniaturized. The increase in size cannot be avoided.

[Problems to be Solved by the Invention] In addition to miniaturizing the tilt angle detector, the present invention also makes it possible to make the measurement three-dimensional and cope with large angle changes, and in particular expands the range of the output signal. The purpose of this is to increase the detection signal difference with respect to changes in the tilt angle and improve the reliability of measurement.

[Means for solving problems]

In order to achieve the above object, the attitude sensor of the present invention is provided with a pair of electrical resistors whose paths are enlarged by reciprocating in the width direction of the toric body at mutually opposing positions on the toric body,
Electrodes are made to protrude in the radial direction from a number of equal length points dividing each of the electrical resistors into equal lengths, and a liquid-filled space is provided in which these electrodes are arranged in the circumferential direction of the annular body. ,
The liquid-filled space is filled with a conductive liquid that short-circuits the electrodes.

[Function] In the tilt angle detector having the above configuration, among the electrodes of each of the pair of electrical resistors, the lumps sunk below the liquid surface short-circuit and reduce the resistance of each resistor. The direction and amount of inclination are detected from the resistance values of the resistor and their correlation. Since the above-mentioned pair of resistors are enlarged by reciprocating their paths in the width direction of the annular body, the change in resistance due to the change in the amount of inclination becomes very large. Changes can also be amplified and the structure can be simplified, making the product smaller and smaller.
It can be provided as a lightweight product.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 7 is an explanatory diagram of the principle of the present invention, in which 1 is a container, 2a
, 2b are a pair of electrical resistors provided therein, each having a resistance proportional to its length.One end of each of these resistors 2a, 2b is connected to a power source (not shown), and each resistor 2a,
A number of equal length points dividing 2b into equal lengths are connected to contact points 3, respectively.
It is grounded via a and 3b. Furthermore, the container 1
An appropriate amount of conductive liquid 5 is sealed in a liquid sealed space 4 formed by the following.

The liquid 5 conducts the contacts in the liquid 2b, and the pair of resistors 2a and 2b both exhibit the same resistance value. When the liquid level SI is changed to the liquid level SI shown by the chain line in the same figure, the number of contacts that become conductive in the pair of resistors 2a and 2b changes, and they exhibit different resistance values. Therefore, the slope can be determined from these resistance values. Not only can the size be known, but also the direction of the inclination can be known from the positional relationship of the resistors.

FIG. 1 shows a first practical example of the present invention constructed based on the above principle, in which 11 is a tilt angle detection element, and a toric body 12 composed of a thin plate is arranged symmetrically with respect to a base line in the diametrical direction. Electrical resistors 14a made of conductive wires each exhibiting electrical resistance proportional to their lengths are placed in the left and right half-circular portions when partitioned.
, 14b are provided with an insulating coating and 15b, 15b, . . . are provided to protrude toward the center of the annular body 12.

Furthermore, the annular body 12 forms a liquid-filled space 1B in its center hole, which is a space whose both end faces are closed by any means, and into which the electrodes 15a and 15b face. Then, a conductive liquid 17 with low wettability such as mercury is filled in a part of this space 1B, so that some of the electrodes 15a and 15b of the i+ low resistance elements 14a+4b are brought to the liquid level, as shown in the figure. It is configured to sink to the bottom and short-circuit them.

Thus, the ends of the pair of electrical resistors 14a and 14b are connected to the 1! The electrical resistor 1 is connected to a power source (not shown) for passing current through the electrical resistors 14a and 14b.
The resistance values of 4a and 14b are 'I4. Temporal characteristics,
voltage, etc.), they are connected to a bridge circuit and the equal number of electrodes 15a, 15b in the pair of electrical resistors 14a, 14b are short-circuited, so that the pair of electrical resistors 14a, 14b are If the above-mentioned inclination angle detector, which shows the same resistance value, is tilted around the center axis of the toric body 12, the liquid level island changes, for example, as shown by the chain line in the same figure, and as a result, Electrodes 15a, 15 conductive in a pair of electrical resistors 14a, 14b
The number of b changes and their 'ti resistors +4a, 14
b exhibit different resistance values, thus.

The tilt angle is detected from the resistance value of each of the electrical resistors 14a and 14b.

FIG. 2 shows a second embodiment of the present invention, in which a conductive thin film 24a is used as an electric resistor constituting the detection element 21.

24b, and its thin l! ! 24a, 24
b is provided in a rectangular wave shape on one surface of the annular body 22, and is insulated by making it thin, and the hollow part of the annular body 22 is closed at both ends to form a liquid sealed space 2B, A wave conductive liquid 27 is sealed in a part of it.

Various general-purpose means can be used to provide the thin films 1124a and 24b on the surface of the toric body 22. For example, a metal foil layer may be provided on the entire surface by vapor deposition or the like, and the foil layer may be etched. A method of forming a rectangular wave shape, a method of vapor depositing a metal foil film on a rectangular wave shape, a method of fIC-bonding or embedding a metal foil piece cut into a rectangular wave shape in advance on the end face of the annular body 22 is used. be able to.

In the figure, 28a and 28b indicate lead wires that are electrically connected to the thin fi 24a and 24b.

The operation of the tilt angle detector having the above configuration is opposite to that of the eleventh and second embodiments.
5a and 35b are made to protrude toward the outside of the annular body 32. That is, the annular body 32 is housed inside a container 39 for configuring the liquid sealed space 36, and the outer peripheral surface of the annular body 32 is formed into an uneven shape like a gear. A pair of coated electrical resistors 34a, 34b similar to
The electrode 35a is wound from the equal length point on each electric resistor 34a, 34b.

35b protrudes outward, and a small amount of conductive liquid 37 is sealed in a liquid sealed space 3B formed between the container 39 and the annular body 32.

fR1 with the above configuration! The angle detector also functions in much the same way as the one in FIG.

This figure shows a two-direction tilt angle detector.

A pair of tilt angle detection elements 41A included in the detector.

41B, the electrical resistors 44a and 44b provided on the surfaces of the annular bodies 42a and 42b have a sawtooth wave shape, but the structure is not limited to this, and the structure can be similar to that of each of the above embodiments. I can do it.

These detection elements 41A, 41B are connected to both toric bodies 4.
2a and 42b from the outside, and the container 48
A conductive liquid (not shown) for short-circuiting electrodes 45a and 45b led out from each electric resistor 44a and 44b to the inside of the annular body is placed in the liquid sealed space 46 formed by the container 49. is stored.

In the figure, 48a and 48b indicate lead wires connected to the electrical resistors 44a and 44b.

In the tilt angle detector having the above configuration, the horizontal axis L of the toric body is
The slope around 1 is detected by the difference in resistance between the leads 1i48a, 48a or 48b, 48b of the pair of detection elements 41A, 4)B.

! @ Figure 5 shows an omnidirectional tilt angle detector as the fifth embodiment of the present invention, and as is clear from Figures 5 and 6,
A large number of detection elements 51 of different sizes with protruding electrodes 55a and 55b are provided inside a toric body 52, and the detection elements 51 are sequentially polymerized and bonded in an arrangement such that the outer shape is approximately spherical. A conductive liquid 57 is sealed in a substantially spherical liquid-filled space 5G formed inside.

In the figure, 58a and 58b indicate lead wires.

In the omnidirectional tilt angle detector with the above configuration, the axial line along the vertical axis is 1.
Detects whether the vehicle is tilted.

When performing the above detection, the omnidirectional tilt angle detector may be held in any direction, and no matter how much the tilt angle detector is held in any direction, the tilt angle detector may be held in any direction from the direction along the vertical axis. Only a small amount is detected.

Each of the above-mentioned detectors can be used in measurement fields that do not strictly pursue accuracy, such as measuring the posture of a person or an animal, controlling the inclination of walking aids, detecting and controlling the inclination of mobile machines, etc. The front view of the example is a front view of the example, and the NIJS diagram is a cross section of the third example. 4 is a perspective view of the fourth embodiment, and FIGS. 5 and 6 are front views and partially separated perspective views of the fifth embodiment,
FIG. 7 is a diagram explaining the principle of the present invention.

11.21, 31, 41A, 41B, 51 φ・detection element, 12.22, 32, 42A, 42B, 52... toric body, 44a, 44b, 54a, 54b e a electrical resistor.

15a, 15b, 25a, 25b, 35a, 35b, 4
5a, 45b, 55a, 55b *・Electrode.

1e, 2e, 'ae, 4e, 5g--liquid sealed space.

! 7, 27, 37, 57... Conductive liquid.

designated agent Director, Product Science Research Institute, Agency of Industrial Science and Technology Kyouji Takahashi Figure 1 @Figure 3 Figure 2 Figure 4

Claims (1)

[Claims] 1. A pair of electrical resistors whose paths are enlarged by reciprocating in the width direction of the annular body are provided at positions facing each other on the toric body, and a large number of resistors are provided to divide each of the electrical resistors into equal lengths. A liquid-filled space is provided in which electrodes are made to protrude in the radial direction from the long point, and these electrodes are arranged in the circumferential direction of the toroidal body. A tilt angle detector characterized by containing a liquid.