JPH01163000A - Automatic discrimination system for vehicle or the like - Google Patents

Abstract

PURPOSE:To obtain more constant position relation wherein an automatic communication is possible between the vehicle and a ground station by providing a reception sensitivity controller to at least an on-vehicle radio transmitter receiver between the on-vehicle radio transmitter receiver and a ground radio transmitting receiving station. CONSTITUTION:The reception sensitivity controller 15 is provided to at least the on-vehicle radio transmitter receiver 4 between the on-vehicle radio transmitter receiver 4 and ground radio transmitting receiving station 6. Therefore, the on-vehicle radio transmitter receiver 4 is adjusted by the reception sensitivity controller 15 to make the reception sensitivity of a radio wave from the ground station 6 constant. Namely, the position relation wherein the automatic communication between the vehicle 2 equipped with the on-vehicle radio transmitter receiver 4 and the ground station 6 is possible can be made constant, and the state wherein the vehicle 2 is at a specific position is accurately detected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic vehicle identification system suitable for application to a truck scale or the like.

[Conventional technology and its problems]

Recently, a vehicle has been equipped with an on-vehicle wireless transceiver having at least a transmitting section, a receiving section, and a storage section, and various data are transmitted and received between the wireless transceiver and a radio transmitting/receiving station on the ground. 2. Description of the Related Art An automatic identification system for a vehicle, etc., in which at least a wireless transceiver is capable of transmitting a self-identification signal of a vehicle, etc. equipped with the radio transceiver, has been developed.

However, in the above system, multiple vehicles must be managed by one ground-based wireless transmitter/receiver station, but in order to automatically transmit and receive data to and from a specific vehicle at a certain point, the characteristics of the on-board wireless transmitter/receiver must be adjusted. It is necessary to make it constant, but this is very difficult. One of the reasons for this is a manufacturing problem, and the other is that the influence of metal parts, such as the body of the vehicle to which it is attached, on the radio varies depending on the shape of each vehicle and the mounting location.

For this reason, for example, truck scales have conventionally automatically read the vehicle number etc. when a truck approaches the ground station, but it is difficult to check whether the truck is stopped at the correct position on the scale. This is done using photo sensors and ultrasonic detectors. However, photo sensors are susceptible to dirt such as mud (especially noticeable outdoors), and ultrasonic detectors are susceptible to rain and strong winds, making detection unstable outdoors.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above problems, and an object of the present invention is to provide an automatic identification system for vehicles, etc. that can maintain a constant positional relationship that enables automatic communication between a vehicle equipped with a radio transceiver and a ground station. do.

[Failure to solve the problem]

The above purpose is to equip a vehicle with an on-vehicle wireless transceiver having at least a transmitting section, a receiving section, and a storage section, and to transmit and receive various data between the wireless transceiver and a ground-based wireless transmitting/receiving station. , in an automatic identification system for a vehicle, etc., in which the on-vehicle radio transceiver is capable of transmitting a self-identification signal of at least a vehicle equipped with the on-vehicle radio transceiver; This is achieved by an automatic identification system for vehicles, etc., characterized in that a reception sensitivity adjuster is provided at least on the vehicle-side wireless transceiver.

[For production]

By adjusting the reception sensitivity adjuster of the on-board radio transceiver, it is possible to keep the radio reception sensitivity from the radio transceiver station on the ground constant. That is, it is possible to more accurately detect a vehicle equipped with an on-vehicle wireless transmitter/receiver and a wireless transmitter/receiver station on the ground.

〔Example〕

Hereinafter, an automatic truck scale identification system according to an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a truck (2) is mounted on a truck scale (1), and is loaded with, for example, gravel (3). A part of the vehicle is equipped with an on-vehicle wireless transmitter/receiver (hereinafter simply referred to as a tag) (4). In the figure, it is shown as being attached to the outside of the truck (2), but it is actually installed in the driver's seat at a position where the driver can see it while driving. A ground terminal (6) is installed near the truck scale (1), and consists of a communication device (7) and an information processing device (8). An information processing device (8) receives an analog signal from a load cell (5) that detects the total weight of a truck (2) mounted on a truck scale (1), amplifies and calculates the signal, and sends a digital signal to the communication device. This weight signal is sent to (7). The communication device (7) has an antenna (7) and is configured to transmit and receive information to and from the tag (4).

Various data are transmitted 2 between the communication device (7) and the information processing device (8).

The above-mentioned ground terminal (6) has a shape as shown in Figure 2, and the parts corresponding to those in Figure 1 are given the same reference numerals, but the information processing equipment (8) panel has a different display. For example, as shown in the figure, a truck (2) currently riding on a truck scale (1) is equipped with a device.
The unique vehicle number, weight value at the time, and the workshop are displayed.

FIG. 3 shows a circuit diagram of the tag (4) installed in the truck (2), in which the signal received by the antenna α is sent to the receiving unit via the receiving sensitivity adjusting unit Q5 according to the present invention. Q0, and the contents of memory (2) are sent to the transmitter αυ, which is transmitted through the antenna α41! (7)
A control section (2) is provided between the receiving section αQ and the memory (to) to transmit the signal received at the receiving section (1 (I) as necessary. The data is processed in an appropriate form and stored in the memory, or the memory a3 is driven.

According to the present invention, the above-mentioned reception sensitivity adjustment section (g) adjusts the reception sensitivity of the signal received from the antenna α4 so that it is constant with respect to the ground station (6).

FIG. 4 shows a circuit diagram of the communication device (7) of the ground terminal [6]. is connected, the transmitting section 07 is also connected, and the receiving section (07) is connected.
The received signal from the transmitter/receiver is supplied to the transmitter/receiver controller (to), and from the transmitter/receiver controller (g), the transmitter signal is sent to the transmitter αη as required.
The signal is transmitted to the tag (4) on the truck (2) side via the tag (4) on the truck (2) side.

The transmission/reception control section (to) is further supplied with a weight signal from the truck scale (1) via an information processing device (3).

The above-mentioned reception sensitivity adjustment part adjusts the reception sensitivity of the signal from the tag (4), but it also makes the positional relationship between the vehicle and the ground station (61) more constant for reception and transmission. It becomes easy to change.

The automatic truck scale identification system according to the embodiment of the present invention is constructed as described above, and its operation will be explained next.

When the truck (2) loaded with 3 tons is placed on the truck scale (1) as shown in Figure 1, the tag (4)
Communication is developed at the ground station (6), and the ground station (6) issues a stop command, and when the Shito2 Tsuk stops, the weight signal from the 0-Docel (5) is transmitted to the information processing device (8). This A performs calculations and sends it as a digital value to the communication device (7).A trigger signal from (7a) is used between the antenna (7a) of the communication device (7) and the tag (4). The tag (4) is ready for reception or transmission.

The tag (4) sends the vehicle number as the contents of the memory (2) shown in FIG. 3 to the communication device (7).

Further, the digital weight signal from the information processing device (8) is sent to the tag (4) via the communication device (7) and displayed on the display section shown in FIG.

In addition to the vehicle number, this display section also displays the detected total weight of the truck and the work number for that truck.

According to the embodiment of the present invention, the reception sensitivity of both the tag (4) and the communication device (7) can be adjusted by the adjustment section (g) α9, so that the truck and the ground station (
It is possible to reliably transmit and receive data between the scale (1) and the track (1), and it is also possible to accurately position and stop the truck on the scale (1).

Furthermore, according to the present invention, the following effects can also be achieved. That is, by providing two antennas on the ground station side, it is possible to issue a command to the vehicle to "move forward" or "go backward" and quickly position the vehicle.

Although the present invention has been described in detail above, it goes without saying that the present invention is not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the application to a truck scale has been described, but the invention may be applied to an automatic taxi identification system instead. Alternatively, it may be used in a weighing system for containers or trolleys.

In addition, in the above embodiment, in order to keep the communication strength between the on-board station and the ground station constant, both stations have reception sensitivity adjustment units (to) α!
1 is used, but the effects of the present invention can be obtained even if the reception sensitivity adjustment section a9 on the ground station side is omitted.

〔Effect of the invention〕

As described above, according to the automatic identification system for vehicles, etc. of the present invention, the positional relationship that allows automatic communication between the ground station and the on-board stations (if there are many) can be fixed,
Furthermore, it is possible to easily position a vehicle or the like to a specific location without using a photo sensor or an ultrasonic sensor.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the entire automatic identification system for truck scales according to an embodiment of the present invention, FIG. 2 is a front view of the ground station terminal in FIG. 1, and FIG. 3 is a view of the tag in FIG. 1. The circuit diagram and FIG. 4 are circuit diagrams of the communication device of the ground station terminal in FIG. In the figure,

Claims (1)

[Claims] A vehicle is equipped with an on-board wireless transceiver having at least a transmitting section, a receiving section, and a storage section, and various data are transmitted and received between the wireless transceiver and a radio transmitting/receiving station on the ground. In an automatic identification system for a vehicle, etc., which is capable of transmitting a self-identification signal of a vehicle equipped with at least a transceiver, at least one of the on-vehicle radio transceiver and the ground radio transceiver station is provided. An automatic identification system for vehicles, etc., characterized by having a reception sensitivity adjuster installed on the transmitter/receiver.