JP3198253B2 - Inductive wireless device diagnostic system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide for transmitting information between a ground operation control device constituting a base station and a mobile machine moving on a predetermined traveling line, for example, in a coke plant. The present invention relates to a wireless device diagnostic system.

[0002]

2. Description of the Related Art An inductive radio apparatus has advantages such as being able to transmit information between a mobile station and a base station in a non-contact manner, and being less susceptible to airborne conditions such as dust and rain and the surrounding environment. Has been used in various ways (e.g.,
JP-A-61-103216, JP-A-60-203029),
For example, in a coke plant, it is used for transmitting information between a plurality of mobile machines traveling between a plurality of kilns and an operation control device provided on the ground.

In a system using such an inductive wireless device, a loop test using an inductive wireless tester, a general tester such as a tester or an oscilloscope is used to stably operate the inductive wireless device. The failure of the induction wireless device is diagnosed by measuring the transmission / reception level of all the antennas, measuring the impedance of the antenna or the induction wire using an impedance meter, or the like. In addition, the guidance wireless device itself is generally provided with a disconnection detection function for detecting a disconnection between boards in the device as a failure detection function.

Here, focusing on the failure of the induction radio apparatus, a failure due to a gap abnormality between the antenna and the guide line, that is, damage to the antenna caused by contact of the antenna with the guide line, and separation of the antenna from the guide line The transmission anomalies caused by the weakening of the electromagnetic coupling are dominant. The gap abnormality between the antenna and the guide wire, which is the cause of such a failure, is particularly high when used in a coke plant, where the environmental temperature is high, and the furnace body deformation tends to cause steps or distortion on the rail. From that
Easy to occur.

[0005]

However, the above-described gap abnormality between the antenna and the guide wire cannot be detected at all by the disconnection detection function provided in the guide radio apparatus itself. In addition, since the inductive wireless tester is effective only for a specific frequency and interface specification, like an inductive wireless device used in a coke factory,
In a system that controls the operation of a plurality of mobile machines using various frequencies, it is difficult to detect the above-described gap abnormality using an inductive wireless tester.

Further, since the above-described gap abnormality occurs at a specific traveling position of the mobile machine, when the gap abnormality is detected using a general tester such as a tester or an oscilloscope, for example, at a coke plant, In the interval between operations, the operator of the mobile machinery and the electric maintenance staff
It is necessary to test the mobile machine by traveling the entire length of the rail while communicating between the site and the electric room where the operation control device is installed. For this reason, there is a problem that the influence on the operation is large and the gap abnormality is detected off-line, so that when the gap abnormality is detected, it takes a lot of labor and time to recover the gap abnormality. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. It is an object of the present invention to quickly cope with an abnormal occurrence of a gap between an antenna and a guide wire in a guide radio apparatus. , Can be restored in a short time,
It is an object of the present invention to provide a diagnostic system for an induction wireless device capable of efficiently performing preventive maintenance such as regular repair or maintenance of a rail of a mobile machine.

[0008]

According to an aspect of this to achieve the above purpose
The diagnostic system for an inductive wireless device according to the present invention moves on a rail.
An antenna is provided on a moving mobile machine, and the mobile machine travels.
Along the line, connect to the base station and install a guide line,
In front of the mobile machine via the antenna and the guide wire
Guided radio that transmits information to and from the base station
Upon diagnosing apparatus, reception level in the inductive wireless device, and detects the travel position of the mobile machine, on the basis of these detected information, the gap before Kia antenna and said guide wire, traveling of the mobile machine It is characterized in that it is managed online according to the location.

[0009]

FIG. 1 is a diagram for explaining the principle of the present invention. In the induction radio apparatus, when a high-frequency current 2 is supplied from a transmitter (not shown) to an induction line 1, a high-frequency magnetic flux 3 is generated around the induction line 1, whereby an induction current 5 and an induction current are generated in an antenna 4 provided in a mobile machine. Power 6 is induced. Here, the strength of the electromagnetic induction coupling between the guide wire 1 and the antenna 4 is

(Equation 1) B: magnetic flux density (Wb / m ² ) μ ₀ : magnetic permeability I: current (A) r: gap (m) between the induction wire and the antenna, expressed by the cube of the distance between the antenna 4 and the induction wire 1 Decreases proportionately.

Therefore, the reception input (dB) induced in the antenna 4 is based on the transmission output of the transmitter supplying the high-frequency current 2 to the induction wire 1, the attenuation due to the line resistance of the induction wire 1, and the above-mentioned antenna 4. It is a value obtained by subtracting the entire attenuation including attenuation due to the distance between the vehicle and the guide line 1. However, in general, the attenuation due to the distance between the antenna 4 and the guide wire 1 is much larger than the attenuation in the line, so that
If the signal based on the input received by the antenna 4 is monitored in accordance with the traveling position of the mobile machine, the gap between the antenna 4 and the guide wire 1 can be managed.

[0011]

FIG. 2 is a block diagram showing an embodiment of the present invention. The mobile machine 11 moves on a rail 12, and a guide line 13 is provided along a traveling line of the mobile machine 11. The guide line 13 forms a part of the guide wireless device and is coupled to a base station (not shown).

The mobile machine 11 is provided with a transmission / reception unit 15 which constitutes a part of the guidance radio apparatus and transmits information to / from the base station via the guidance line 13. The transmission / reception unit 15 includes a reception antenna 16, a frequency demodulation circuit 17, a parallel / serial conversion circuit 18, a voltage conversion circuit 19, an I / O device 20, a frequency modulation circuit 21, a power amplification circuit 22, and a transmission antenna 23. .

In the transmission / reception unit 15, in the reception system, the reception input at the reception antenna 16 is demodulated by the frequency demodulation circuit 17 and converted into serial data, and the serial data is converted into parallel data by the parallel / serial conversion circuit 18. After the conversion, the voltage is converted into a voltage signal by a voltage conversion circuit 19, and the voltage signal is output via an I / O device 20. In the transmission system, a transmission signal input through the I / O device 20 is converted into a frequency modulation circuit 21 through a voltage conversion circuit 19 and a parallel / serial conversion circuit 18.
, And frequency-modulates the power.
Then, the power is amplified and transmitted from the transmitting antenna 23 toward the guide line 13.

In this embodiment, the reception level at the frequency demodulation circuit 17, that is, the reference voltage of the serial data output from the frequency demodulation circuit 17, is supplied to the controller 25. Further, the mobile machine 11 is provided with a position detecting device 26 for detecting a traveling position on the traveling line (for example, a kiln number in the case of a coke factory), and supplies the traveling position detected here to the controller 25. I do. Thereby, in the controller 25, the reception level from the frequency demodulation circuit 17 is made to correspond to the traveling position of the mobile machine 11 from the position detection device 26, and the information is supplied to the monitor 27 and displayed online, The data is supplied to the database hard disk 28 and stored.

Here, the relationship between the reception input (dB) from the reception antenna 16 in the frequency demodulation circuit 17 and the reception level is as shown in FIG. 3, for example. That is, when the receiving antenna 16 approaches the induction wire 13, the receiving input approaches the oscillator output, and the receiving level increases,
When the receiving antenna 16 is separated from the guide wire 13, the receiving input moves away from the oscillator output, and the receiving level also decreases.

Therefore, in this embodiment, preferably, the controller 25 sets an upper limit value and a lower limit value of the reception level when the gap between the reception antenna 16 and the guide wire 13 is within a normal value range, and sets the upper limit value and the lower limit value thereof. In the reception level region exceeding the upper limit value, a caution level region and an abnormal level region where the reception antenna 16 is too close to the guide wire 13 and the antenna may be damaged are set in stages. Similarly, in the reception level area below the lower limit,
A caution level area and an abnormal level area where the receiving antenna 16 may be too far from the guide line 13 to make communication impossible are set in stages. In this way, as shown in FIG. 4, the reception level and the traveling position of the mobile machine 11 are displayed in association with each other on the monitor 27, and the information is supplied to the database hard disk 28 and stored.

According to this embodiment, the gap between the receiving antenna 16 and the guide line 13 can be managed online based on the reception level corresponding to the traveling position of the mobile machine 11 displayed on the monitor 27. It is possible to quickly cope with the occurrence of a gap abnormality and recover in a short period of time, and efficiently perform preventive maintenance such as repairing by periodic regular maintenance or maintenance of a rail of a mobile machine. Further, since the information to be displayed on the monitor 27 is stored in the database hard disk 28, a long-term change tendency of the gap can be searched, and occurrence of a gap abnormality can be prevented.

In the embodiment described above, the gap between the antenna and the guide line is managed online on the mobile machine side. However, the reception level (gap information) and travel position information detected on the mobile machine side are The data may be transmitted to the base station via the transmission antenna and the guide wire, and managed by the base station. Further, the traveling position information is transmitted from the mobile machine side to the base station via the transmission antenna and the guide line, and the base station side similarly communicates with the antenna based on the received traveling position and its reception level. The gap with the line can be managed online.

[0019]

As described above, according to the present invention, the rail
An antenna provided on a mobile machine moving on the mobile device;
The gap with the guide line connected to the base station along the traveling line of the machine is managed online according to the traveling position of the mobile machine. It is possible to respond quickly and recover in a short time, and to efficiently perform preventive maintenance such as repairing by periodic regular maintenance or maintenance of rails of mobile machines.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention.

FIG. 2 is a block diagram showing one embodiment of the present invention.

FIG. 3 is a graph showing a relationship between a reception input and a reception level in the frequency demodulation circuit shown in FIG. 2;

FIG. 4 is a diagram showing a display example on a monitor shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Induction line 2 High frequency current 3 High frequency magnetic flux 4 Antenna 5 Induction current 6 Electromotive force 11 Mobile machine 12 Rail 13 Induction line 15 Transmitter / receiver 16 Receiving antenna 17 Frequency demodulation circuit 18 Parallel / serial conversion circuit 19 Voltage conversion circuit 20 I / O Device 21 Frequency modulation circuit 22 Power amplification circuit 23 Transmission antenna 25 Controller 26 Position detection device 27 Monitor 28 Database hard disk

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-195123 (JP, A) JP-A-59-121503 (JP, A) JP-A-53-30511 (JP, A) JP-A-6-195123 40338 (JP, A) JP-A-52-66176 (JP, A) JP-A-61-255135 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) G05D 1/02

Claims (1)

(57) [Claims] (1)Antennas for mobile machines moving on rails
Provided and coupled to a base station along the travel line of the mobile machine
Installing a guide wire, the antenna and the guide wire
Transmission of information between the mobile machine and the base station via
In diagnosing an inductive wireless device that performs  Reception level in the guidance radio device, and the movement
Detects the traveling position of the machine and, based on the detected information,NoteWith antennaSaidGuide wire
Gap corresponding to the traveling position of the mobile machine.
In-line wireless device diagnostics characterized by on-line management
Disconnection system.