JP3603604B2 - Method and apparatus for controlling antenna position of guided wireless device for mobile machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for controlling an antenna position of an induction radio apparatus for detecting a position of a mobile machine moving on a rail.
[0002]
[Prior art]
Information transmission between a ground station and a mobile station by inductive radio has advantages such as being less susceptible to airborne conditions such as dust and rain and the surrounding environment, and is therefore used in various production lines. ing. For example, in a coke oven factory, in order to detect the positions of a plurality of mobile machines traveling between a plurality of kilns and stop at a predetermined kiln position, information is transmitted between an operation control device provided on the ground and the mobile machines. An induction wireless system is used.
[0003]
A moving machine attached to the coke oven, that is, a coke oven mover, a charging car for charging raw coal into the coke oven, an extruder for extruding coke, and a guide for guiding extruded coke to a fire extinguishing car. Although there are cars and the like, in recent years, unmanned operation of various mobile machines has been carried out for efficiency. For example, in order to perform such automatic operation of the coke moving device, it is required to stop the moving device at a predetermined kiln position, which also requires accurate position detection of the moving device. come.
[0004]
[Problems to be solved by the invention]
The position detection of the mobile machine using the guidance wireless device is performed by laying a cable as a guide line from the operation control device on the ground along a rail on which the mobile device travels, and transmitting a radio wave transmitted from the cable to the mobile device side. This is performed by receiving with the installed antenna.
However, in this method, when the relative distance between the cable and the antenna changes, a problem occurs in the position detection of the mobile machine. That is, if the distance between the cable and the antenna is too large, the position of the mobile machine cannot be detected, and the mobile machine cannot be stopped at a predetermined position. Also, if this distance is too short, the antenna may come into contact with the cable due to the vibration of the moving machine when traveling on the rails, etc.In this case, the antenna is damaged and it is impossible to detect the position of the moving machine. It will be connected. Therefore, in this method, it is necessary to properly maintain the distance between the cable and the antenna.
[0005]
However, for example, in a moving machine of a coke oven, the distance between the cable and the antenna is controlled in a range of approximately 50 to 110 mm. For example, there may be a step between the left and right rails. In addition, such a step changes with time and further changes depending on the traveling position of the mobile machine. As a result, the distance between the cable and the antenna changes from position to position along the rails of the mobile machine and over time. If such a change in the distance between the cable and the antenna deviates from the above management value, the position of the mobile machine cannot be detected, or the automatic operation is interrupted due to the breakage of the antenna, resulting in a decrease in coke oven productivity. They are connected.
[0006]
As described above, when the distance between the cable and the antenna deviates from the predetermined management value range, the mobile machine is moved to the place, so that a person measures the distance between the cable and the antenna and enters the management value range. The installation location of the cable had to be changed, which was very troublesome.
[0007]
Regarding this point, the technique disclosed in Japanese Patent Application Laid-Open No. 10-3315 proposes a method of detecting such an abnormality in the distance between the cable and the antenna from online information of guided radio. However, according to this conventional technique, it is only possible to determine whether or not the distance between the cable and the antenna is out of a predetermined management value range. The position had to be adjusted manually.
[0008]
The present invention has been made in view of the problems the prior art described above are having, place, over time such as warping of subsidence and rail body sleepers of rail moving machine travels to its intended It is an object of the present invention to provide an antenna position control method and an antenna position control method capable of accurately grasping and adjusting online a gap abnormality between a cable and an antenna in an inductive radio apparatus that occurs in response to a change. .
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to an antenna position control method for a guidance radio apparatus for detecting a position of a mobile machine traveling on a rail, the method comprising: measure the distance between the antenna which is arranged on a machine, the antenna position control method of the induction radio apparatus, characterized in that the measured value moves the antenna by the power device to be within a predetermined control value range It is.
[0010]
Further, the present invention is an antenna position control device of an induction radio device for detecting a position of a mobile machine traveling on a rail, wherein the antenna position control device is provided on the mobile device with a guide wire disposed along the rail. A measuring device for measuring a distance to the antenna, a power device for moving the antenna in a direction to change the distance, and operating the power device based on a comparison between a measured value of the measuring device and a predetermined management value. an antenna position control device of the induction Shirubena ray device you; and a control device.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
It will be described below with reference to the accompanying drawings one embodiment of the antenna position置制control method for a mobile machine for inducing a radio apparatus according to the present invention. FIG. 1 shows an example in which the method according to the present invention is applied to an extruder used in a coke oven. The two rails 3 on which the extruder 1 runs are laid along the side surface of the furnace body 2 of the coke oven, and the operation control device (shown in the figure) as a ground station along the outer one of the two rails 3. The cable 4 is fixed to the metal support 5 while being separated from the ground. On the other hand, an antenna 6 is mounted on the frame of the extruder 1 corresponding to the cable 4. As shown in FIG. 2, the antenna 6 is disposed so as to be movable in a direction approaching or moving away from the cable by the air cylinder 8, but is set at a position separated from the cable 4 by a predetermined distance. Such an antenna position is referred to as a reference position.
[0012]
Such a relative position of the antenna 6 with respect to the cable 4 should be kept within an appropriate range in which radio waves transmitted from the cable 4 can be efficiently received, for example, within a range of 50 to 110 mm. Further, the extruder 1 is equipped with a laser type distance meter 7 which is a measuring device for measuring the distance between the cable 4 and the antenna 6 corresponding to the height of the cable 4 from the ground. The laser distance meter 7 in this embodiment is of a type using an infrared semiconductor laser having a wavelength of 780 nm, and is fixed on a frame of the extruder 1 separated from the cable 4 by 200 mm. Such a distance measurement by the laser distance meter 7 is performed at a predetermined position where each kiln of the coke oven of the extruder 1 is located.
[0013]
Assuming that the distance between the antenna 6 and the laser distance meter 7 at the reference position is D, the distance X between the cable 4 and the antenna 6 is equal to the distance between the cable 4 and the laser distance actually measured by the laser distance meter 7. This is a value obtained by subtracting D from the distance L to the total 7. That is, X = LD.
As shown in FIG. 1, when the sleeper of the rail 3 sinks or the rail main body is distorted, the extruder 1 is inclined according to the degree and direction of the sinking or distortion. The distance X between them also changes, and the degree of settlement or distortion near which kiln is generated can be easily known by monitoring the measured value L by the laser distance meter 7.
[0014]
In the present invention, the antenna 6 moves in a direction to approach or move away from the cable 4 by driving the air cylinder 8 according to a change in the distance X between the cable 4 and the antenna 6. After the actual measurement data L of the laser range finder 7 is calculated as described above, the data X is input to the controller 9 which is a control device. It is determined whether the data is within the range.
[0015]
For example, in FIG. 3, when it is determined that the data X is larger than the upper limit value (here, 110 mm) of the predetermined management value range, the controller 9 controls the power unit so that the antenna 6 moves in the direction approaching the cable 4. When the distance between the antenna 6 and the cable 4 reaches a management value within a predetermined range, a stop signal is sent to stop the operation of the air cylinder 8. In FIG. 3, the solid line indicates a change in the distance between the antenna 6 and the cable 4 by the laser range finder 7, and the dotted line indicates the distance after being moved by the operation of the air cylinder 8. Similarly, when it is determined that the data X is smaller than the lower limit value (50 mm in this case) of the management values in the predetermined range, the controller 9 controls the air cylinder so that the antenna 6 moves in a direction away from the cable 4. An actuation signal is sent to 8 and a stop signal is sent to stop the operation of the air cylinder 8 when the distance between the antenna 6 and the cable 4 falls within a predetermined management value range. As described above, even when the antenna 6 is displaced from the reference position outside the range of the predetermined control value due to the sinking or distortion of the rail or the like, it is possible to control the air cylinder 8 to return to the proper position.
[0016]
The above description is an example in which the present invention is applied to an extruder for a coke oven. A charging vehicle in which a cable is supported by a furnace body and the distance between the cable and the antenna changes due to furnace body deformation. Of course, the present invention can also be applied to a guide car. Further, although the air cylinder is used to move the antenna, the invention is not limited to this. Any means can be used as long as it can be driven and controlled by an electric signal from the controller.
The means for measuring the distance between the guide wire and the antenna is not limited to the laser range finder 7 described above, and a method that can measure the distance in a non-contact manner, such as an infrared range finder, may be used. it can.
[0017]
【The invention's effect】
As described above, according to the present invention, even if the distance between the cable and the antenna changes due to the sinking or distortion of the rail or the like, the antenna is controlled to return to the appropriate position according to the measurement value of the range finder. Therefore, it is possible to prevent interruption of automatic driving due to a cable disconnection accident due to antenna cable contact or an inability to detect the position of a mobile machine. In addition, since a change with time in the distance between the cable and the antenna can be grasped, planned repair can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing a case where an antenna position control method in an induction wireless device according to the present invention is applied to an extruder used in a coke oven.
FIG. 2 is a schematic explanatory diagram for explaining distance measurement between a cable and an antenna.
FIG. 3 is a diagram showing measured values of the distance between a cable and an antenna corresponding to each kiln position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Extruder 2 Furnace body 3 Rail 4 Cable 5 Support body 6 Antenna 7 Laser distance meter 8 Air cylinder 9 Controller

Claims (2)

An antenna position control method for a guidance radio apparatus for detecting a position of a mobile machine traveling on a rail, comprising: a control unit configured to control a position between a guide wire provided along the rail and an antenna provided on the mobile machine. An antenna position control method for an inductive wireless device, comprising: measuring a distance; and moving the antenna by a power device such that the measured value falls within a predetermined management value range. An antenna position control device of an induction radio device for detecting a position of a mobile machine traveling on a rail, comprising: a guide wire disposed along the rail; and an antenna of the induction radio device disposed on the mobile machine. A measuring device that measures the distance to the power device, a power device that moves the antenna in a direction to change the distance, and a control device that operates the power device based on a comparison between a value measured by the measuring device and a predetermined management value. An antenna position control device for an induction radio device, comprising:

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