JPH05225368A - Method for reading out identification number of moving object - Google Patents

Abstract

PURPOSE:To set up a method for simply and economically reading out an identification(ID) number by sticking a simple ID piece to a moving object and detecting a vehicle number signal expressed by the ID piece without constituting a complex and large device system using microwaves, radio waves, etc., as a method for reading out the vehicle number of a moving object. CONSTITUTION:The ID number reader is constituted by fixing a detection means consisting of a magnet 2 and a trigger magnet 3 to the lower face of a carrier 1 mounting an article X as an ID piece expressing its vehicle number, correspondingly arranging magnetic sensors 4, 5 on a carrier route on the ground side, sending output signals from the sensors 4, 5 sensing magnetism when the magnets 2, 3 on the ID piece pass the sensors 4, 5 to a vehicle control device 10 through an input device 6, binarizing the output signals to a binary number expressing the vehicle number, and finding out the vehicle number by operation to read out the vehicle number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reading an identification number of a moving object such as a carrier.

[0002]

2. Description of the Related Art For example, a method of reading a unique identification number attached to a moving object such as a vehicle, a container or an automobile in a non-contact manner is based on an optical signal, a method using magnetism, or a method using microwave radio waves. Various types are known. As an example of a method of reading the identification number using the microwave radio wave, Japanese Patent Laid-Open No. 53-1428.
There is a publication of No. 90. The identification device according to this publication is
An interrogator that transmits a question signal for number identification by transmitting it on a microwave, and receives the question number from this interrogator, rectifies the pulse train signal, and uses this as a DC power supply to include the unique identification number of the moving object. It consists of a response device mounted on a moving object that carries a response signal on microwaves and sends it back to the interrogator.

[0003]

Since the above-described microwave radio wave identification device uses microwave radio waves, it can identify a moving object even when it is remote, and transmits energy by using a received signal of the microwave radio waves as a power source. As a general rule, it has the advantage of not requiring a battery, etc., but it corresponds to the circuit for responding to the interrogation wave to the transponder installed on the moving object side and the efficient use of energy by the received signal sent. As a practical method, the answering machine and the control unit installed on the ground side become large due to the need for batteries, etc., which also increases the weight, which increases the cost and requires further maintenance. There are various points to be improved.

The present invention has been made aware of the problems in the current state of the conventional method for reading the identification number of a moving object described above,
It is an object of the present invention to provide a method for simplifying a control device without using conventional microwave radio waves, and for reading an identification number by an economical and simple method without providing a complicated circuit or battery for an identification object. To do.

[0005]

In order to solve the above-mentioned problems, the present invention is provided with a means to be detected composed of identification pieces which are regularly arranged at a predetermined interval along a traveling direction at an appropriate position of a moving object, and the ground side is provided. A detection means for reading the detected means is provided on the moving path of the moving object, and the vehicle number is represented by the identification piece as an array peculiar to the moving object, and when the detected means passes within the detection range of the detecting means. In addition, the method of reading the identification number of a moving object is characterized in that the array of the identification pieces is read by the detecting means, and the temporal change in output based on the array is converted into the vehicle number by the converting means.

In this case, the identification piece is preferably a magnet.

[0007]

According to the above-mentioned method, the array of the identification pieces represents the vehicle number, and the signal detected by the detecting means is read based on the time change corresponding to the array. If the read signal is made to correspond to the array of bits (0 or 1) corresponding to the vehicle number, the signal read for each array becomes a binary number representing the vehicle number, and thus the vehicle number is read. Be done.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall schematic view of an apparatus for reading the identification number of a transport vehicle as a moving object. On the lower surface of the transport vehicle 1 on which the article X is placed, there is attached a detected means consisting of a magnet 2 as an identification piece representing a vehicle number and a trigger magnet 3.

As shown in FIG. 2, the identification pieces of the magnets 2 and 3 are arranged at predetermined intervals along the traveling direction, and magnetic sensors 4, 5 for detecting the magnetism of the identification pieces are arranged on the movement path on the ground side.
Are provided correspondingly. Trigger magnet 3
Is provided to set the timing for reading the information from the identification piece.

In the reading device of the embodiment constructed as described above, the vehicle number is read as follows. When the transport vehicle moves in the traveling direction, the magnetic sensors 4, 5 read the presence or absence of the identification piece in response to the magnetism of the magnets 2, 3 of the identification piece. The changes over time in the outputs of the sensors 4 and 5 are as shown in FIG. This output is input to the input device 6, and on the assumption that the output of the magnetic sensor 5 is ON, the presence or absence of the identification piece is converted into the presence or absence of the output of the magnetic sensor 4, that is, an ON / OFF signal. The presence / absence of the identification piece is determined in advance in correspondence with a unique array representing the vehicle number.

The signal thus input to the input device 6 is
The moving speed of the carrier vehicle is measured by a detection means (not shown), and a code is generated so as to correspond to a binary number representing a vehicle number by a binary signal of 1 or 0 at each time when each of the identification pieces passes through the magnetic sensor. The converted signal is output, and the vehicle number is identified by detecting this in the vehicle control device 10.

In the example of FIG. 2, when 3a → ON, 2a → ON, so 1 (2 ⁴ ) 3b → ON, 2b → OFF, 0 (2 ³ ) 3c → ON, 2c → ON, 1 (2 ² ) When 3d → ON, 2d → OFF, so 0 (2 ¹ ) When 3e → ON, 2e → ON, so 1 (2 ⁰ ). That is, the binary number given by the input device 6 is 101
01 and the vehicle number is recognized as 21.

When the number of vehicles operating on the transportation route is small and the identification number is small, only the magnet 2 and the magnetic sensor 4 are provided, and the vehicle number is detected only by the identification piece of the magnet 2. Good.

[0014]

As described in detail above, in the identification number reading method according to the present invention, the vehicle number is read by the time change of the output of the detection means based on the identification pieces attached to the specific array, so that the vehicle number can be recognized only. No control device (control unit) is required, the number of sensors for vehicle number detection is minimal, and the detection means for vehicle number recognition installed on the vehicle side is simple, such as a magnet or slit plate. Therefore, the control device including the function of controlling the traveling of the vehicle can be downsized, which is advantageous in terms of cost and the identification piece attached to the transport vehicle does not require an electronic circuit, a battery, etc. Various advantages such as not needing it can be obtained.

[Brief description of drawings]

FIG. 1 is an overall schematic view of an identification number reading device according to an embodiment.

FIG. 2 is a diagram showing an arrangement of an identification piece and a magnetic sensor.

FIG. 3 is a diagram showing changes over time in the output of the magnetic sensor.

[Explanation of symbols]

 1 Transport Vehicle 2 Magnet 3 Magnet 4 Magnetic Sensor 5 Magnetic Sensor 6 Input Device 10 Vehicle Control Device

Claims (2)

[Claims] 1. Detecting means for detecting a detecting means on a moving path of a moving object on the ground side, the detecting means comprising identification pieces arranged regularly at predetermined intervals along a traveling direction at an appropriate position of the moving object. Means is provided to represent the vehicle number as an array unique to the moving object, and when the detected means passes through the detection range of the detection means, the array of the identification pieces is read by the detection means and the array thereof is arranged. A method for reading an identification number of a moving object, wherein the conversion means converts a temporal output change based on the above into a vehicle number. 2. The method of reading an identification number of a moving object according to claim 1, wherein the identification piece is a magnet.