JPS6373806A - Position detector for magnetic levitation type running device - Google Patents

Abstract

PURPOSE:To enable a positional relation between a slider and rails, to be exact ly detected, by composing a position detector for a running device in magnetic levitation system, of the position detecting coil of a rectangular insulator wound up with the coil, and a target. CONSTITUTION:A position detector 6 is composed of 8 target 13 and a rectangu lar insulator 7 with the periphery wound up with a coil 8. Both the ends 9, 10 of the coil 8 are wound up respectively to be projected from the insulator 7. Besides, both the ends 9, 10 of the coil 8 are bent to be directed to inclined lower sections. As a result, the output voltage distribution of the coil 8 for the movement of the target 13 can be almost uniformed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a position detector for a magnetically levitated traveling device, and particularly to a position detector for a magnetically levitated traveling device, in particular a position detector for a magnetically levitated traveling device, in which a slider is moved along a guide rail by magnetic force. The present invention relates to a position detector for a magnetic levitation traveling device.

[Prior Art] A magnetic levitation type traveling device is one in which a slider levitates and travels along a guide rail by magnetic force, and an example thereof is the one disclosed in Japanese Patent Application No. 190263/1983. be. In such a magnetic levitation traveling device, an electromagnet for generating magnetic force, a battery for supplying power to the electromagnet, and the like are mounted on a slider. However,
Because the slider is heavy, it is necessary to generate a strong magnetic force from an electromagnet, and a large capacity battery must be used. Instead of a battery, there is a method of supplying power from outside using a cable, but this method has the drawback that the movement of the slider is restricted by the cable.

Therefore, in cases where the slider has a short travel distance, the electromagnets for levitation and the electromagnets for lateral control are installed on the rail side to reduce the weight of the slider. A magnetic levitation traveling device that levitates the slider is considered.

By the way, in the above-mentioned magnetic levitation traveling device, it is necessary to detect the gap between the electromagnet for levitation and the electromagnet for left/right direction control and the slider, and to control the slider and slider to appropriate positions. For this purpose, a position detector is used.

FIG. 7 is a diagram showing a detection section of a position detector of a conventional magnetic levitation traveling device. In FIG. 7, the position detector 1 is
It includes a sensing coil 2, which is formed into a flat spiral shape by an etching method and is attached to the surface of a resin member 3. Both ends of the sensing coil 2 are connected to through holes 4 from below the resin member 3.
5 and is connected to a coaxial cable (not shown).

[Problems to be Solved by the Invention] When the position detector 1 configured as described above is mounted on the rail side, there is a limit to the length of the slider, so it is necessary to provide the slider with a target material of sufficient length. The drawback was that it was not possible.

Therefore, the main object of the present invention is to provide a magnetic levitation system that is optimal for accurately detecting the positional relationship between a slider and a guide rail in a magnetic levitation traveling device equipped with an electromagnet and a position detection coil on the guide rail side. An object of the present invention is to provide a position detector for a type traveling device.

[Means for Solving the Problems] The present invention includes a position detection coil that is attached to a guide surface of a guide rail of a magnetic levitation traveling device and is provided facing a position detection target arranged on a slider. In the position detector for a magnetically levitated traveling device, the position detection coil is wound around a rectangular insulator whose longitudinal direction is arranged parallel to the guide rail.

[Function] The position detector for a magnetically levitated traveling device according to the present invention is constituted by a position detection coil formed by winding a coil around a long sword insulator and a target. There is no risk of misalignment,
The positional relationship between the slider and the rail can be detected accurately.

[Embodiment of the Invention] FIG. 1 is an external perspective view of an embodiment of the invention, and FIG.
Figure 3 and Figure 3 are diagrams showing the output voltage of the position detector when the target is moved from one end of the position detection coil to the other with the side of the position detector and the gap between the target and the position detection coil being constant. be.

In FIG. 1, the position detection coil 6 is connected to the target 1.
3 and a rectangular insulator 7 around which a coil 8 is wound. Both ends 9 and 10 of the coil 8 are wound so as to protrude from the insulator 7, respectively. However, as shown in FIG. 2(a), when both ends 9 and 10 of the coil 8 are made to protrude from the insulator 7, the output voltage distribution when the target 13 is moved from one end of the coil to the other is the second. figure(
As shown in b), the voltage at both ends 9 and 10 becomes high. Therefore, as shown in FIG. 3(a), both ends 9 and 10 of the coil 8 are bent so as to face obliquely downward. Thereby, as shown in FIG. 3(b), the output voltage distribution of the coil 8 with respect to the movement of the target 13 can be made substantially flat.

FIG. 4 is a diagram showing the positional relationship between the position detection coil and the target according to an embodiment of the present invention. In Figure 4,
A slider 12 is movably provided on the guide rail 11, and the position detection coil 6 is arranged on the guide rail 11 so as to be substantially parallel to the guide rail 11. On the other hand, a target 13 is provided on the slider 12 at a position corresponding to the position detection coil 6 of the guide rail 11.

Therefore, even if the slider 12 moves in the longitudinal direction of the guide rail 11, the gap between the slider 12 and the guide rail 11 can be accurately detected.

5 and 6 are diagrams showing a specific example of a magnetically levitated traveling device to which an embodiment of the present invention is applied. In particular, FIG. 5 shows a front view, and FIG. 6 shows a side view. show.

As shown in FIG. 4 above, position detection coils 6a and 6b are arranged on the guide rail 11 to detect the upper and lower positions of the slider 12. , a position detection coil 6C for detecting the position of the slider 12 in the left and right direction is provided. on the other hand,
The slider 12 is provided with a target 13a facing the position detection coil 6a, a target 13b facing the position detection coil 6b, and a target 13c facing the position detection coil 6C. Furthermore, electromagnets 14a and 14b are provided on both side surfaces of the guide rail 11 for controlling the left and right directions of the slider 12, and the slider 12 has magnetic closing plates 15a and 15b facing the electromagnets 14a and 14b. provided. Further, on the lower side of the guide rail 11, a levitation electromagnet 14c,
14d, and the slider 12 is provided with an electromagnet 14C1.
A magnetic closing plate 15c is provided opposite to 14d.

As described above, the magnetic l\upper type traveling device is configured, and the electromagnet 1
When 4c and 14d are driven, the slider 12 floats from the guide rail 11 due to the magnetic force, and the electromagnets 14a and 14
By operating b, the left and right direction of the slider 12 is controlled. Then, the position of the slider 12 in the left and right direction is detected by the position detection coil 6C, and the position detection coil 6a.

6b detects the vertical position of the slider 12.

[Effects of the Invention] As described above, according to the present invention, a coil is wound around the insulator of the long sword body, and the coil is arranged on the guide rail in parallel with the guide rail, facing the target arranged on the slider. Therefore, even if the slider moves on the rail and the target moves in the longitudinal direction of the coil, the gap between the slider and the guide rail can be accurately detected.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of one embodiment of the present invention. Second
3 and 3 are diagrams showing the output voltage distribution when the target moves in the longitudinal direction of the coil while the gap between the side surface of the position detector, the target, and the coil is constant. FIG. 4 is a plan view showing the positional relationship between the position detection coil and the target. 5 and 6 are diagrams showing a specific example of a magnetic levitation type traveling device to which an embodiment of the present invention is applied. In particular, FIG. 5 shows a front view, and FIG. 6 shows a side view. show. FIG. 7 is a diagram showing a position detection coil of a conventional magnetic floating traveling device. In the figure, 6.6a, 6b, and 6c are position detection coils, 7 is an insulator, 8 is a coil, 9 and 10 are end portions of the coil,
11 is a guide rail, 12 is a slider, 13a, 13b
, 13c indicate the target. Marriage 1 diagram

Claims (3)

[Claims] (1) In a magnetically levitated traveling device in which a slider is levitated by electromagnetic attraction and travels along a guide rail, there is a target for position detection attached to the slider, and a target provided on the guide rail opposite to the target. A position detector equipped with an eddy current type position detection coil, the position detection coil having a core of a rectangular insulator whose longitudinal direction is parallel to the guide rail. A position detector for a magnetically levitated traveling device, characterized in that the position detector is wound around the insulator. (2) The position detection coil is wound so as to protrude from both ends of the insulator in the longitudinal direction, and both ends thereof are bent in a direction opposite to the target. Position detector for magnetic levitation traveling equipment. (3) The magnetic levitation type according to claim 1, wherein the target has a rectangular shape and is arranged such that its longitudinal direction is parallel to the guide rail and intersects with the coil. Position detector for traveling equipment.