JPH05288822A - Detecting device for address information travelling body position - Google Patents

Abstract

PURPOSE:To easily detect not only a relative address but an absolute address by means of crossing guide wire by providing an antenna for timing detection to read the absolute address corresponding to a crossing position between absolute address sections on the crossing guide wire. CONSTITUTION:A crossing guide wire is provided with crossing sections 10, 11, 12, 13, 14, etc., thereon, in which a section including the sections 10 and 11 is an absolute address detection section, and the others are relative address detection sections having a respectively specified length. The absolute address detection guide section consists of an absolute address section 10 and a spece section 11 having a respectively specified length. Antennas (m) and (n) for reading absolute addresses and address data antennas A to F are provided as receiving antenna on a travelling station side. When it is detected that the antennas (m) and (n) of the travelling body is at the timing position for detecting absolute address corresponding to the crossing section of the absolute address section, the absolute address is read according to this timing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detection of a moving body (a locomotive, a crane, etc.), and more particularly to a device suitable for easily detecting an absolute address with a device similar to a relative address.

[0002]

2. Description of the Related Art FIG. 4 is a diagram for explaining an absolute address and a relative address. Assuming that an address is determined for each point at equal intervals from the starting point of 0 as shown by the display line 40 in the figure, this address indicates one absolute address starting from 0. Meanwhile, 1, 5, 10, 15 and that there is an absolute address of the detector, when the moving body is moved from the place of 0 to 15 direction, reads the absolute address in the first place, 1 is 2 places
It is assumed that counts up from 1 to +2 are detected in the places from 1 to +3. Similarly, when the moving body moves in the direction of 15 from the position of 9, the absolute address is read at the position of 10 , and 11 is detected as +1 and 12 is detected as +2 in a count-up manner. On the contrary, when the moving body moves in the opposite direction from the location of 10 , for example, it is assumed that the countdown is detected as -1, -2. The value detected from the absolute address in a count-up or count-down manner is called a relative address.

In order to detect the position of a moving body such as a locomotive or a crane, a signal having a predetermined frequency is excited on a crossing guide wire which crosses at a predetermined interval, and a receiving antenna of the moving body moves along the signal. At the same time, the signal is sent to the receiver installed on the moving body, the relative address is detected by the detection output, and a method such as a separately provided proximity switch or limit switch is conventionally used to detect the absolute address. It was

FIG. 5 shows a conventional example used in an overhead crane. Crane position detection is
In the transverse direction, a guide wireless system using a cross guide wire,
Further, the height position of the hook is detected by a rotation pulse generator connected to the hoisting drum. Both of these are relative position detections, but in the traveling and traversing directions, the absolute address is corrected using a proximity switch, and in the height direction, the absolute position is corrected by a sensor linked to the rotary pulse generator. In order to detect the traveling position of the crane, the frequency of the induction radio band (80.4 kHz, unmodulated) is 50 cm from the fixed station side.
Output to a pair of guide wires crossed at intervals. On the side of the mobile station, six antennas arranged at intervals of 10 cm receive this, two adjacent phases are compared, the number of times the phase is inverted is counted, and phase detection is performed. In FIG. 5, when the crossing induction wire and the receiving antenna are in the relative positions as shown,
Since the antenna A and the antenna B cross the crossing point of the induction line, the phases of the reception carriers of A and B are inverted,
The output of the phase comparator is such that AB becomes 1, and BC to EF all give 0. When the crane moves in the forward direction shown in FIG. 5, the output of the phase comparator is AB → BC → C sequentially.
1 stands for D → DE → EF → AB. When the crane moves in the reverse direction, AB → EF → DE → CD → BC → A
1 stands for B. The output of the phase comparator is divided into two parts, one is directly sent to the memory unit as position recognition in 10 cm units, and the other is sent to the decoder unit for counting 50 cm. The decoder section generates an up pulse or a down pulse depending on the direction in which the output of the phase comparator advances, and the counter section receives this and performs binary counting in units of 50 cm. If the reference position correction is not performed in the position detection by the relative address detection, the detection data changes each time the power of the phase detection device is turned on and off, and even if the count is incorrect for some reason, it cannot be corrected. Therefore, the required number of proximity switch actuating iron plates are attached along the crossing guide line, and the proximity switch is mounted on the crane side to correct the above-mentioned problems and detect the absolute address. The traverse position detection is basically the same as the above-mentioned traveling position detection, and therefore its details are omitted.

As described above with reference to FIG. 5, conventionally, the position of a moving body such as a crane can be detected by a device that detects an absolute address by combining a limit switch or a proximity switch and a relative address by a crossing guide wire. It was done.

[0006]

As described above, conventionally, the position of a moving object such as a crane has been detected by detecting an absolute address and a relative address. However, a detecting method for detecting these is required. And different equipment. In other words, the detection of the absolute address required another equipment different from the detection of the relative address. SUMMARY OF THE INVENTION It is an object of the present invention to provide an address information detecting device for a moving body position, which can easily detect not only a relative address but also an absolute address by using a crossing guide wire.

[0007]

In order to achieve the above object, an address information detecting device for a mobile body position according to the present invention is provided with a transmitter arranged on a fixed position side (for example, on the ground) and excitation by the transmitter. Crossing guide wire, a moving body that moves along the installation direction of the crossing guide wire, a receiving antenna provided on the moving body so as to receive a signal from the crossing guide wire, and the receiving antenna and the crossing wire. As a means for detecting the address information through the guide line, as a means for detecting the address information, the crossing guide line is a relative address detection section as shown in FIG. 1A, for example. In addition to the above, a part of an absolute address area having a predetermined length is provided, and the receiving antenna is an antenna for reading address data for reading address data of relative address and absolute address as shown in FIG. 1 (b), for example. With the above crossover Includes an absolute address for reading antenna for timing detection to read an absolute address corresponding to the intersecting position of the absolute address sections on lead, and by detecting the absolute address in addition to the relative address of the mobile location. Here, the receiving antenna is equipped with an absolute address reading antenna at predetermined positions on both ends of the address data reading antenna,
Thus, the timing for reading the absolute address is detected. In this case, the detection of the timing of reading the absolute address may be performed by the level detection method as shown in FIG. 2, for example, by the timing of the drop in the reception output of the antenna for reading the absolute address. Alternatively, as the detection of the timing to read the absolute address, for example, as shown in FIG. 3, the phase detection method is used to detect the phase between the absolute address reading antenna and the address data reading antenna that are adjacent to each other across the crossing point of the crossing induction line. It can also be due to the fall timing of the combined output of. The detection of the absolute address of the position of the moving body may be performed by reading the address of the address data reading antenna at the time of detecting the timing of reading the absolute address.

[0008]

According to the present invention, there is an absolute address area of a predetermined length in the crossing guide line, and the absolute address reading antenna of the mobile unit is at the absolute address detection timing position corresponding to the crossing position between the absolute address areas. When this is detected, the absolute address is read at this timing. According to the present invention, the reading of the absolute address is performed by the address data reading antenna which also serves as the reading of the relative address, so that the same address reading as the conventional one can be applied. If the two absolute address reading antennas are located at the same positions as the two crossing points between the absolute address areas, the above absolute address reading timing can be detected by detecting the level of the drop in the output of both antennas. By combining the outputs of the antenna for reading the absolute address and the antenna for reading the address data, it becomes possible to easily detect the fall timing of the combined output due to the inverted phase antenna output. For this, the same frequency as that for detecting relative addresses is used, and detection can be performed by extending the crossing induction wire and the receiving antenna by the amount of absolute address detection.Therefore, different equipment may be required for detecting absolute addresses as in the past. Absent. As described above, according to the present invention, the reading of the absolute address can be easily performed by the same device as in the case of the relative address.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a crossing induction wire and a receiving antenna according to an embodiment of the present invention, in which FIG.
FIG. 1B shows a receiving antenna including a configuration of an absolute address reading antenna and an address data antenna. Figure 1 (a)
, 10, 11, 12, 13, 14 and the like indicate the respective crossing sections of the crossing guide lines, the sections including 10 and 11 are absolute address detection guide line sections, and the others are 500 sections respectively.
It is a relative address detection section including an intersection section having a length of mm. The absolute address detection guide line sections are each 70 more long.
It consists of 0mm absolute space 10 and space section 11. The space section 11 is for identifying the absolute address areas from the relative address detection section. This crossover guide line is an extension connection of the same frequency and guide line as the guide radio in the relative address detection section.It is installed on the fixed side along the moving direction of the mobile station and detected by the receiving antenna provided on the mobile station side. To be done. In FIG. 1B, a and a are absolute address reading antennas, and A to F are address data antennas for commonly reading the relative address and absolute address data.

2 and 3 show an embodiment of reading the absolute address by the guide wire and the receiving antenna in the absolute address area 10 of FIG. 1, and in particular, FIG. 2 shows an example of detecting the level of the receiving antenna, and FIG. Shows an example of phase detection of a receiving antenna.

In FIG. 2, the absolute address antennas A and B and the address data antennas B, C and E (F is an even parity) coincide with each other at the intersections. At the crossing point, the output level of the receiving antenna will drop extremely,
If the level drops to such a level, it is "1".
In the example of FIG. 2, both outputs A and B of the absolute address antenna give an output of "1". And this gives the timing to read the absolute address. The figure shows the state at this timing. In this case, "1" is given as the output of the antennas B, C, E, and when the absolute address is indicated by the sum of binary absolute address data allocation, in this case, 2 + 4 + 16 = 22 is the absolute address. ..

The case of FIG. 3 is an example in which the absolute address is read by detecting the phase of two sets of receiving antennas that are adjacent to each other across the intersection. The adjacent portions of the intersecting guide wires are 180 degrees out of phase with each other.
The outputs of the two antennas cancel each other because they are different
It is assumed that the output of "1" is given as in the above case, and the output of "0" is given in the case of the same phase.

In the case of FIG. 3, the combination of A and A and the combination of F and B both give the output of "1" to give the timing of reading the absolute address. As a result that the combination of D and the combination of E and F give an output of "1", the absolute address becomes 22 from the total sum of allocation of absolute address data. It goes without saying that if the absolute addresses are different, the crossover patterns shown in FIGS. 2 and 3 are different.

In the receiving antennas of FIGS. 2 and 3, two absolute address reading antennas are arranged at both ends of the six address data antennas at intervals of 100 mm (in the case of FIG. 2, even parity is included). The absolute zone shown in FIG. 1 occupies a length of 700 mm.

As described above, according to the present invention, the absolute address can be easily detected by using the same equipment as the relative address.

[0016]

According to the present invention, since the absolute address can be easily detected by also using the equipment for relative position detection (antenna, receiving unit, etc.), there is an advantage that other equipment can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional induction wire and a receiving antenna according to an embodiment of the present invention.

[Fig.2] Guide wire and receiving antenna between absolute ban districts (especially example of level detection of receiving antenna)

[Fig.3] Guide wire between absolute ban district and receiving antenna (especially phase detection example of receiving antenna)

FIG. 4 is a diagram for explaining an absolute address and a relative address.

FIG. 5 Conventional example diagram

[Explanation of symbols]

 10, 11, 12, 13, 14, ... Crossing section of crossing guide line 40 ... Display line for explaining absolute address and relative address

Claims (5)

[Claims] 1. A transmitter arranged on a fixed position side (for example, on the ground), a cross induction wire excited by the transmitter, a moving body which moves along the installation direction of the cross induction wire, and the cross induction wire. A receiving antenna provided on the moving body so as to receive a signal from a line, and means for detecting address information through the receiving antenna and the crossing guide line, and obtain the address information of the moving body position accompanying the movement. In the detecting device, as a means to detect the above address information, the crossing guide line has a part between absolute address areas of a predetermined length in addition to the relative address detection section, and the receiving antenna has a relative address and an absolute address. With the address data reading antenna for reading the address data of
It is equipped with an absolute address reading antenna for detecting the timing of reading the absolute address corresponding to the crossing position between the absolute numbers on the crossing guide line, and detecting the absolute address in addition to the relative address of the moving body position. An address information detecting device for the position of the moving body. 2. The address information detecting device at the position of a moving body according to claim 1, wherein the receiving antenna is provided with absolute address reading antennas at predetermined positions at both ends of the address data reading antenna. Address information detection device for mobile body position. 3. The address information detecting device for moving body position according to claim 1 or 2, wherein the detection of the timing of reading the absolute address is based on the timing of the drop of the reception output of the absolute address reading antenna. An address information detecting device for the position of a moving body, characterized by: 4. The address information detecting device for moving body position according to claim 1 or 2, wherein the timing of reading the absolute address is detected by an absolute address reading antenna which is adjacent to the crossing point of the crossing guide line. An address information detecting device for a position of a moving body, which is based on a falling timing of a combined output of phase detection of an address data reading antenna. 5. The moving body position address information detecting device according to claim 1, wherein the absolute address of the moving body position is detected by reading the address data at the time of detecting the timing of reading the absolute address. An address information detecting device for a position of a mobile body, which is characterized by reading an address of a mobile antenna.