JPH01129157A - Apparatus for diagnosing main cable of elevator - Google Patents

Abstract

PURPOSE:To accurately diagnose the inferiority of a main cable, by generating magnetic flux by allowing a current to flow to the main cable and detecting the same by a detection means consisting of a superconductive coil and a Hall element. CONSTITUTION:A power supply 21 is connected to the main cable 1 of an elevator to allow a current to flow to said cable 1 and magnetic flux phi is generated around the main cable 1. This magnetic flux is detected by the first coil 31 composed of a superconductive material and this detection current Is is guided to the second coil 32 similarly composed of a superconductive material. The second coil 32 is provided to a magnetism shield means 34 and the self- inductance thereof is made smaller than that of the first coil. The magnetic flux formed by the second coil 32 is allowed to pierce through a Hall element 33 and the output voltage of the Hall element 33 at that time is detected by a voltage detection means. When the main cable 1 is abraded and broken, the output voltage of the aforementioned voltage detection means changes and, therefore, by detecting this output change, the breaking state of the main cable 1 can be diagnosed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a diagnostic device l/c for checking the state of breakage of the main rope of an elevator.

[Conventional technology]

If the main rope for an elevator were to break, it would be catastrophic*, so it is necessary to inspect it regularly. When inspecting the main rope, we check to see if the length of the worn part of the wire called the worn foot exceeds a predetermined value, and to check if the wire itself is broken.

This inspection is usually carried out by operating the elevator at low speed and visually inspecting the condition of the main rope, but a flaw detection method using magnetism has also been developed, as shown in Fig. 4.

In Figure 5, (11 is the main rope, (1a) is the main rope of the dove, which is broken in the middle, (2) is the electromagnet, and (3) is the magnetic flux. Probe to detect (
detector), (4! is the magnetic flux due to electromagnet (2), (4!
a) is the leakage magnetic flux formed at the fracture part of element #(1a), (
51 is an amplifier (61 is an alarm).

The main rope moves and the broken part of the strand (1a) becomes the probe (3)
When the probe (3) passes through the opposing portion of the probe (3), a minute voltage is generated in the probe (3) due to the intersection with the leakage magnetic flux (4a).

This voltage is amplified by an amplifier (5) and further activates an alarm (6). This allows diagnosis of the main rope 11+.

[Problem that the invention seeks to solve]

Among the above-mentioned conventional examples, visual inspection is extremely difficult to inspect the entire circumference of the main rope during -degree operation. In addition, since the main rope twists as it moves, the method of driving the vehicle many times while visually inspecting the zero section is likely to cause zero inspection to be overlooked. For this reason, there is a problem in that simultaneous inspection by many people is required, which takes a lot of time and effort.

Also, even with the device shown in Figure 5, the strands are extremely thin! 1c
It cannot be detected unless it becomes m or breaks. There was a problem with accuracy.

The present invention was made to solve this problem, and an object of the present invention is to provide a diagnostic device for inspecting wear and breakage of the main rope.

[Means for solving problems]

A diagnostic device for an elevator main rope according to the present invention is a device for diagnosing an elevator main rope.

A magnetic flux is generated in the main rope, this magnetic flux is detected by a first wire ring made of a superconducting material, and a second wire ring with self-inductance and less stiffness than the first wire ring is made of superconductor. A voltage detection means detects the voltage generated by the Hall effect when the magnetic flux produced by the second ring passes through the Hall element.

[Effect]

In this invention, since the first wire ring and the second m-wheel are made of superconducting material, losses in the middle can be eliminated.

Therefore, the current that corresponds to minute changes in magnetic flux is
The voltage flows through one wheel of iIi, and can be detected by the voltage detection means. In addition, since the inductance of the 2nd IiFi wheel is made smaller than that of the 11th IM wheel, the 1st MI
The magnetic flux generated by the second @ ring becomes larger than the magnetic flux at *, and the Hall effect becomes significant.

〔Example〕

1 to 3 show an embodiment of the present invention.

In Figure 1, a is the floor of the machine room, where the terminal end of the main rope (11) is locked. a3 car), αhiro is a car as car, f2D is a DC power supply, and power supply (21
A) and (211)) are connected to both ends of the main rope (1) to flow a weak current, and it functions as a magnetic flux generating means for generating the main rope (OVm flux). (21 switch).

C11l is the first @ ring forming superconductivity, moves through a gap with the main rope (II), and has self-inductance L1.

In Fig. 2, (to) is the second wire ring forming superconductivity, the 1IIi ring end is connected to the wire end I/C of the 11th fB ring, and the self-inductance L2 is the self-inductance of the first wire ring. The inductance L1 is also small.

(to) is a Hall element placed inside the second wire ring (to).

K so that the magnetic flux Φ2 generated by the 2nd i1ti ring passes through
It has become. (b) is the 2111i! With magnetic shielding means that magnetically shields the ring, J! Physically, it is surrounded by magnetic material.

In Fig. 3, (to) is the Hall element shown in Fig. 2,
It is formed in a flat plate shape extending in the xy direction, and the second wire ring (to)
The generated magnetic flux Φ2 penetrates in two directions. (
xl) and (x2) Hall elements extending in the X direction (to)
(yl) and (y2) electrodes attached to both sides of the Hall element (to) extending in the y direction.

(Incorporated) is a DC power supply that connects this electrode (yl) and (72) 4C and sends 1h of ik current to the Hall element (to), @ is a voltage detector that detects the voltage between the side surface (xl) and the side surface (x2) It is a vessel.

Next, the operation will be described.

First, the talon and the second coil are each cooled to a low temperature to make them superconducting, and the switch (2IC) is closed. As shown in Fig. 2, when placed in the magnetic field created by the electric current of the main rope (1), the first wire 011Jlc flows through the electric current 8 corresponding to the detected magnetic flux Φ1, and is completely diamagnetized by superconductivity. , the cross magnetic flux becomes zero.

On the other hand, the 2nd + 11th wheels (to) are magnetically shielded.

A magnetic flux Φ2 is generated by the current generator 8 in the direction shown in FIG. 2 without being influenced by the magnetic flux Φ1 and an external magnetic field such as earth's magnetism.

At this time, the 9th order formula is established.

Ll・Φ1=L2・Φ2 Here, Ll: Self-inductance L of the first wire ring O11
2: Self-inductance of the second wire ring (to) Φ1 = 11th
Detection by M ring Op tI3 Magnetic flux Φ2: Magnetic flux due to the third edge ring @ Also, B1: Magnetic flux density detected by the first wire ring Gυ B2: Magnetic flux density due to the second wire ring (to) is established.

B2=B1・111/L2 In this example, since Ll)B2, B2>B1
becomes.

That is, the magnetic flux is amplified and applied to the Hall element, allowing highly sensitive measurement.

Due to this magnetic flux Φ2, the current flowing through the Hall element (to) is biased towards the side surface (xl), resulting in a potential difference between the side surface (xl) and the side surface (x2).

Now, place the Hall element (to) in the magnetic field and connect both electrodes (
y 1) A current (work h) is passed between t (y 2 ),
When a magnetic field is applied to the Hall element, a voltage is generated in a direction perpendicular to both the current and the magnetic field. This is called the Hall effect, and by applying a magnetic field, the electrons inside the p-hole element move in a curved manner. Therefore, a potential difference (V) is generated in a direction perpendicular to the electric field and the magnetic field. This potential difference can be expressed in the following equation.

V: Rh-B2・H/d where d is the thickness of the Hall element, B2 is the strength of the magnetic field,
Machining is the current flowing through the Hall element (2), and Rh is the Hall coefficient.

Therefore, we decided to measure this voltage (V).

Magnetic field B2 can be measured.

Therefore, if deformation occurs due to fragmentation of the main rope (11) or abrasion of the strands, this deformation will appear as a change in the magnetic flux Φ1, and the current Xs, @ flux Φ2 will also change, and the voltage can be detected. It appears as a change in the detected value of the device.By comparing this change value with the reference value.

It is possible to detect defective parts of the main rope (1).

Note that one first wire ring o11 was used.

By providing the main rope (11) over the entire circumference, the entire chest can be detected at the same time.

1ft, 1st, 1li 1 wheel G! l, ]&C may be as shown in FIG. That is, the magnetic flux Φ1 is detected by rotating through a pair of semicircular ship pins (4 oa) to form an annular shape and passing the iron core surrounding the main rope (11) through the first wire ring. Even so, the desired purpose can be achieved.

Yet again. External magnetic flux may be applied to the main rope, and leakage of this magnetic flux may be detected by the first and sixth wheels.

〔Effect of the invention〕

As stated above, this invention generates magnetic flux in the main rope,
This magnetic flux is detected by the 11i151 ring made of superconducting material, and a second wire ring whose self-inductance is smaller than that of the 1st fi1 ring is made of superconducting material and connected to the first wire ring, and this second wire ring is connected to the first wire ring. The magnetic flux created by passes through the Hall element,
Since the voltage generated by the Hall effect is detected by the voltage detection means, there is no electrical loss in the circuit from the first wire ring to the second i wheel.Therefore, even weak magnetic flux changes in the main rope can be detected. It is possible to diagnose high main cords.

In addition, since the inductance of the second MA wheel is made smaller and the stiffness of the first wire ring is also smaller, the magnetic flux generated by the second MA wheel can be increased, making the Hall effect more noticeable and improving diagnostic accuracy. It also has a beneficial effect.

[Brief explanation of the drawing]

1 to 3 show an embodiment of an elevator main rope diagnosis device according to the present invention, in which FIG. 1 is a vertical cross-sectional view of the elevator, FIG. 2 is an overall configuration diagram, and FIG. 3 is a partial diagram. It is a perspective view showing details. FIG. 4 is a diagram corresponding to FIG. 2 showing another embodiment of the present invention. FIG. 5 is a diagram corresponding to FIG. 2 showing a conventional example. In the figure, (1) is the main rope, B3 is the joint, a! 9 Hakado. Qll is a DC power supply, on is a first wire, (to) is a second wire, (to) is a Hall element, (b) is a magnetic shielding means, and (to) is a voltage detection means. Note that the same reference numerals in the two figures indicate the same or equivalent parts.

Claims (1)

[Claims] Magnetic flux generating means for generating magnetic flux in the main rope. A first wire ring made of superconducting material placed in a region intersecting the magnetic flux of the main rope. A second wire is electrically connected to the first wire and is made of a superconducting material and has a self-inductance smaller than that of the first wire. A Hall element through which the magnetic flux generated by this second wire passes. A diagnostic device for an elevator main rope, which includes a voltage detection means for detecting the voltage generated by the Hall element.