JPH0257923A - Detecting method of swing of gondola for cableway - Google Patents

Abstract

PURPOSE:To improve safety and an economic efficiency by providing an apparatus for a cableway with a displacement sensor detecting displacement in the lateral direction and by detecting a swing in the lateral direction of the apparatus along the cableway from an output of the sensor shown when the apparatus moves along the cableway. CONSTITUTION:An acceleration sensor 2 and a displacement measuring circuit based on this sensor detect the displacement of a pendulum 10 due to an acceleration in the direction intersecting the direction of advance of a gondola perpendicularly within a horizontal plane, by a displacement detector 11, and give a servo signal to a coil 13 through a servo amplifier 12 to compensate said displacement so that the pendulum be at a neutral position. Since said signal is proportional to the acceleration impressed, it is amplified by a amplifier 14 and turned to be a band-limited displacement signal through HPF 15, integrators 16, 17 and LPF 18. This signal is taken out through an amplifier 19 and the degree of a danger is judged therefrom. When there is the danger, an alarm is given and an operation to stop running or the like is conducted. In this way, the safety and the economic efficiency of the gondola can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for detecting vibration of a cableway carrier, particularly to a method for continuously detecting vibration in the lateral direction.

(Prior Art) On a cableway such as a ropeway, the carrier hangs down from the cable with one point support, so it is not as stable as on a railway vehicle.

Therefore, although a railway vehicle does not sway when it is stopped, a cableway carrier may sway due to the wind even when it is stopped. For this reason, if the shaking becomes large during operation, not only will the carriage become uncomfortable to ride, but there is also a risk that the carriage will come off the cable, and if it shakes near the cable support tower, there is a risk that the carrier will come into contact with the tower. .

In order to prevent this kind of danger, conventional methods measure the wind speed that causes the shaking, and if the wind speed exceeds a specified value, for example, a wind speed of 20 m/s.
/s or higher, it was considered dangerous and precautions were taken.

FIG. 4 is a configuration diagram of a measuring device according to a conventional wind speed measuring method.

In the figure, reference numeral 1 denotes a wind speed measuring device, and the wind speed measuring device is placed at a location where observation is considered necessary, such as on the support tower 2. The wind speed measuring device 1 has an anemometer 3, and the wind speed information detected by the anemometer 3 is sent to the central control room 7 via transmission@4, an antenna 5 by wireless means, or a transmission line 6 by wired means. It will be done. In the central control room 7, the wind speed indicated by each anemometer sent via the antenna 8 and receiver 9 or via the transmission line 6 is monitored on the display 10, and there are some places where the wind speed is higher than the specified value. In some cases, the cableway was deemed dangerous and the cableway was suspended.

However, the conventional measuring method described above has the following drawbacks.

That is, the locations where the anemometers are installed are discretely located on the support tower and are not continuous along the cable.

For this reason, even if the wind blows locally at a point where an anemometer is not installed, it will not be detected and the danger will be left unaddressed. In particular, cableways are generally used in mountainous areas, where localized gusts of wind often blow, making them extremely dangerous.

On the other hand, on the contrary, the wind often blows only in the area where the anemometer is located, and even in such cases, it is dangerous as long as the value indicated by the anemometer exceeds the specified value, regardless of the magnitude of the actual danger. As a result, the cableway had to stop operating, which worsened operating efficiency and was uneconomical.

(Purpose of the Invention) The present invention was made to solve the problems of the conventional wind speed measuring method as described above, and instead of measuring the wind speed, the present invention continuously measures the shaking of the carrier along the rope. An object of the present invention is to provide a method for detecting vibration of a cableway carrier, which can ensure safety by detecting the vibrations of the vehicle and improve economic efficiency by avoiding unnecessary operation stoppages.

(Summary of the invention) In order to achieve this object, the present invention is configured as follows.

That is, a displacement sensor or an angle sensor for detecting lateral sway is installed on the cableway carrier, and the output of the sensor is used to continuously detect lateral sway along the cable. .

(Example) The present invention will be described in detail below based on the illustrated example and experimental data.

FIGS. 1(a) and 1(b) are a partially cutaway sectional view and a block diagram of a measuring circuit showing an embodiment in which a device for carrying out the method according to the present invention is applied to a ropeway, respectively; In the example, an acceleration sensor is used as a displacement sensor.

In the figure (a), reference numeral 1 denotes a ropeway cable, which is held between pulleys 2 and 2 and suspends a gondola 4 via an arm 3. A housing 7 in which an acceleration sensor 6 is placed on a rocking type stable base 5 is fixed in the gondola 4 so that the acceleration sensor 6 remains horizontal even when the gondola 4 moves. Note that the fins 8 hanging below the stabilizer 5 and the oil 9 in the casing 7 act as dampers to suppress excessive rocking of the stabilizer.

By the way, as shown in the same figure (b), the above-mentioned acceleration sensor 6 and the displacement measurement circuit using the acceleration sensor 6 generate a pendulum 1 by acceleration in a direction (Y-axis direction) orthogonal to the gondola traveling direction in a horizontal plane.
A displacement of 0 is detected by a displacement detector 11, and a servo signal is applied to a coil 13 via a servo amplifier 12 so as to compensate for this to a neutral position. Since the signal is proportional to the applied acceleration, it is first amplified by the amplifier 14, bypass filter 15, two integrators 16, 17,
A band-limited displacement signal is passed through a low-pass filter 18, which is extracted through an amplifier 19, and the degree of danger is determined based on the signal. If it is dangerous, an alarm is issued and operations such as stopping the operation are performed.

When a carrier equipped with the measurement system as described above is run, a signal proportional to the shaking of the carrier can be continuously obtained along the cable.
In case of danger, necessary operations can be carried out.

Figure 2 shows the actual measurement results, where (a) is data when there is almost no shaking, (b) is data when there is shaking of about 7°, and (c) is data when shaking is about 9°. This is the data for the case.

As is clear from the figure, a signal corresponding to the angle of shaking, that is, the displacement, is detected. Therefore, if the shaking exceeds the specified value, it can be easily determined that it is dangerous. Since shaking is not detected at a fixed point but continuously along the cable, shaking can be detected over the entire length of the ropeway, ensuring safety. .

Although the vibration detection method according to the present invention has been described above, the acceleration sensor used in the present invention is not limited to those shown in the embodiments, and may be appropriately selected according to the characteristics of the object to be measured. Since the stable platform on which the sensor is mounted generally tends to be large and heavy, a strap-down type acceleration sensor may be used instead, and the data processing may be left to the microprocessor.

Furthermore, it is also possible to use an angle sensor instead of a displacement sensor.

FIG. 3 is a block diagram of a measurement circuit according to an embodiment in which an acceleration sensor is used as an angle sensor.
It has been established. The operation in the figure is as follows.

That is, in the above-mentioned acceleration sensor, the relationship between the input angle of acceleration and the output voltage is a sine function. Therefore, if the voltage sensitivity of the sensor is E and the output voltage is E'', the tilt angle θ is given by the following equation.

θ=E'/E Therefore, by performing the above calculation instead of the second-order integral in the above embodiment, the inclination angle of the carrier can be determined. If this angle is greater than the specified value, it can be easily determined that it is dangerous, and safety can be ensured as in the previous embodiment.

It goes without saying that the present invention is applicable not only to the Roveway but also to lifts at ski resorts, etc., and can also be applied to railway vehicles.

That is, by installing a sensor that detects lateral shaking in a railway vehicle, it is possible to detect the distortion of the track that causes the shaking from the shaking itself.

(Effects of the Invention) Since the detection method according to the present invention is configured and operates as described above, it is possible to measure wind speed or line distortion, etc. that cause shaking using a relatively simple measurement system. Instead, it is possible to measure the shaking of the carrier itself, so if there is a real danger, the operation can be stopped to ensure safety, and if there is little danger, the operation can be avoided, thereby increasing economic efficiency. It has a significant effect on increasing the

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are diagrams showing an example of sensor arrangement and measurement system blocks when the method according to the present invention is applied to a ropeway, and FIGS. 2(a) and (b) ) and (c
) are diagrams of experimental results showing examples of data measured by the measurement system shown in Figure 1, and Figure 3 shows an example of a measurement system block diagram according to an example in which an acceleration sensor is used as an angle sensor. 4 are configuration diagrams of a measurement system according to a conventional wind speed measurement method. １・・・・・・・・・Cable, ２・・・・・・
...Pulley, 3...Arm, 4.
・・・・・・・・・Gondola, 5・・・・・・−・Swinging type stable platform, 6・・・・・・Acceleration sensor,
7...... Housing, 8...
...Fin, 9-...Oil, 10...Pendulum, 11.
・・・・・・・・・Displacement detector, 12・・・・・・
... Servo amplifier, 13 ...... Coil, 14.19 ...... Amplifier, 1
5... Bypass filter, 16.
17・・・・・・・・・Integrator, 18・・・・・・・・・
・Low-pass filter, 20...... Arithmetic unit patent applicant Toyo Tsushinki Co., Ltd. 10SEc O entrustment C Drawing engraving (8) (b) No.

Claims (2)

[Claims] (1) A displacement sensor that detects lateral displacement is installed on the cableway carrier, and the lateral vibration of the carrier is detected continuously along the cable from the output of the sensor when the carrier moves on the cable. A method for detecting vibration of a cableway carrier. (2) An angle sensor that detects the lateral angle is installed on the cableway carrier, and the lateral sway of the carrier is detected continuously along the cable from the output of the sensor when the carrier moves on the cable. A method for detecting vibration of a cableway carrier.