JPH01278134A - Data communication system applying combination of infrared ray and radio wave - Google Patents

Abstract

PURPOSE:To accurately grasp the positions of many moving bodies and to accurately recognize each of these objects by attaching the portable individual identification ID cards to the moving bodies for detection of the positions of these objects. CONSTITUTION:Each moving body owns a portable transmission/reception ID card 20 to receive successively the position information via an infrared-ray transmitter 10 of a transmission-only fixed station 8 and stores its own position information. The position information on the card 20 is received by a radio wave receiver 6 of a reception-only fixed station 5 and sent to a control center. Then the position of the moving body is searched at the control center. Thus it is possible to obtain the accurate position information on the moving body and at the same time to accurately recognize many moving bodies independently of each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data communication system using a combination of infrared rays and radio waves.

(Prior Art) Conventionally, in a communication system using radio waves, when searching for the location of a moving object, for example, (1) a radio wave oscillator is attached to the moving object, the oscillated radio waves are received by a receiver, and the oscillator By detecting the direction of and the distance to the oscillator,
I was trying to search for the location of a moving object. Also, (2)
Attach a radio wave transmitter/receiver to a mobile object, receive radio waves from a fixed station, and search for the location of the mobile object by adding the code number of the fixed station to the data signal and transmitting it. That's what I was doing.

In addition, as a technique related to the above, for example, Japanese Patent Application Laid-Open No. 1983
-26942, JP-A-62-26950, JP-A-6
No. 2-38040 and the like.

(Problems to be Solved by the Invention) However, in the above-described method of searching for the position of a moving object, (1) Accurate positional accuracy cannot be obtained in a limited narrow area of the moving object.

(2) In order to recognize a large number of moving objects separately, it is necessary to prepare a large number of oscillators with different frequencies and to individually change the receiving frequency on the receiving side.

(3) When radio waves are used, many dead zones occur, the area is large, and the location is likely to be unclear.

There were other problems.

The present invention eliminates the above-mentioned problems, enables the position of a moving object to be accurately grasped, and employs a hybrid method of infrared rays and radio waves, which enables a combination of infrared rays and radio waves to accurately recognize a large number of moving objects separately. The purpose is to provide a data communication method based on

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a data communication system using a combination of infrared rays and radio waves, and includes a portable individual recognition card attached to a moving body. An infrared receiver and a radio wave transmitter provided in the card, a transmission-only fixed station having an infrared transmitter that transmits data to the card, and a reception-only fixed station having a radio wave receiver that receives data from the card. It was designed to be provided.

(Function) According to the present invention, as described above, a portable transmitting/receiving 1δ ID (individual identification) card is attached to a mobile object, and position information from an infrared transmitter of a fixed station is successively received by this ID card. Remember your location information. The location information of this ID card is received by the radio wave receiver of the fixed station and sent to a management center, and this center searches for the location of the mobile object.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of a data communication system using a combination of infrared rays and radio waves, showing an embodiment of the present invention.
A D (individual recognition) card is attached to a moving object to detect the position of the moving object. FIG. 2 is a configuration diagram of the ID card.

In Fig. 1, 1 is a control console C-C installed in a building management center, etc., and a CPU (central processing bag ff) 2
, CRT-KB (display/keyboard) 3, etc. are provided. 4 is the data transmission path, 5 is the R of the ID card 20
This is a reception-only fixed station RR that receives signals from a TX (transmitter), and is equipped with a weak radio wave reception 111RRX6 and a one-chip microcomputer MPU7 for signal processing. 8 is an infrared transmission mainly using an infrared light emitting diode that transmits data (position data) regarding the position of the signal processing one-chip microcomputer MPU 9 and the ID card 20, which has the function of a local control device L-C-C! 1110 is a transmit-only fixed station IT.

On the other hand, as shown in FIG. 2, the ID card 20 includes a weak radio wave transmitter RTX21, an infrared receiver IRX22, a one-chip microcomputer for signal processing MPU23, a buzzer BZ24,
Equipped with solar cell BA725 etc.

Therefore, in this system, each transmission-only fixed station r
The TX always sends out position information that is individually recognized for each fixed station, and the ID card 20 stores the position information of the nearest transmission-only fixed station ITX, and when a mobile unit changes its position, the next The location information of the transmission-only fixed station is stored, so that the latest location information is always available at the management center. Also, each ID card should be individually printed! Store individual recognition information such as D codes, additional information required by the system, etc., and attach it to moving objects such as animals and humans to be managed.
Install the D cards one at a time.

Next, a position information transmission system using infrared rays will be explained.

First, as a means for transmitting and receiving position information, etc., spatial transmission is performed using infrared rays, and in principle an optical spatial transmission system shown in FIG. 3 is used. That is, in FIG. 3, input data is sent to the modulator 31. The light emitting element 3 via the amplifier 32
3, and is received by the light receiving element 34 via the light emitting element 33 through space, and the received light data is received via the amplifier 35 and the demodulator 36.

Next, FIG. 4 is a system configuration diagram of the infrared transmitting side of the present invention.
1. ITX2. rTX3, ITX4, etc., and the transmission of the ITX communication signal is performed as shown in FIG. 5, for example. In other words, the structure of the communication data frame between L-C-C5 and ITXI is as shown in ■, preamble 41.
, system address 42, position address (10 bits)
43, time information 44, and check focus 45, and each infrared transmitter sequentially transmits an IQms position identification signal 51.
and a polling signal 52 are sent, after which a polling response time 53 is taken.

On the other hand, on the infrared receiver side, each IDc
(ID card) is allocated a reception time of 3Qms,
Verification logic for L-C-C5 and C-C1 (not shown)
After each IDC is judged based on the verification signal from
[Received by RX.

The IRX received data frame includes, for example, a preamble 61 (16 bits), a slave station address 62 (16 bits), and a position information fI 163 (16 bits), as shown in FIG.
0 bit), time information Iu64 (16 bits), arbitrary data 65 (8 bits), check 66 (16 bits)
The time information (16 bits) indicates the time when the IDC read the position.

With this configuration, the current position of the moving object,
Be able to appropriately grasp identification documents, etc. As a means for this purpose, a hybrid method of infrared rays and radio waves is adopted, so it can be used as a practical ID card by taking advantage of the advantages of both.

The present invention is suitable for the following cases.

(1) Current position of VIP (m important person) for disaster prevention measures1
In the event of a recognized earthquake or fire, each I
By collecting the location information of the D card and confirming the VIP's location, it is possible to take early measures for the disaster prevention system.

(2) Services for users of intelligent buildings, etc. By understanding the movement status of users of intelligent buildings, etc. at the center, when an emergency call is necessary, etc., calls and guidance are provided by broadcasting and information display devices in the building. By doing this, it is possible to provide detailed services.

(Effects of the Invention) As described above in detail, according to the present invention, the following effects can be achieved.

(1) It is possible to store individual recognition information and location information from an infrared fixed station on an ID card attached to a mobile object using a hybrid system of infrared rays and radio waves, and to accurately manage location information when changing locations.

(2) The location information of the ID card can be known by simply providing an infrared receiver without providing a radio wave receiver on the ID card, and the configuration of the ID card can be simplified. (3) The accuracy of detecting individual positions of moving bodies can be improved.

(4) The position of a moving object can be recognized without using multiple radio waves.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a data communication system using a combination of infrared rays and radio waves showing an embodiment of the present invention, and FIG.
The configuration diagram of the D card, Figure 3 is a schematic diagram of the optical space transmission system, Figure 4 is the system configuration diagram of the infrared transmission side of the present invention, Figure 5 is the infrared transmission time chart, and Figure 6 is the infrared reception time. The chart, FIG. 7, is a diagram showing the structure of an infrared reception data frame. 1...Building management center control console c-C12...C
PU (central processing unit), 3...CRT-KB (display/keyboard), 4...data transmission line, 5...fixed station for reception RR16...weak radio wave reception MRRX, 7
゜9.23...One-chip microcomputer MPU for signal processing
, 8... Fixed station IT for sending epsilon, 10... Infrared transmitter, 2°... ID card, 21... Weak radio wave transmitter RTX, 22... Infrared receiver IRX, 24...・・・
Buzzer BZ, 25...Solar battery BAT. Patent applicant Oki Electric Industry Co., Ltd. (1 other person) Agent Patent attorney Mamoru Shimizu Figure 2

Claims (1)

[Claims] (a) A portable individual recognition card attached to a moving body; (b) An infrared receiver and a radio wave transmitter provided on the card; (c) An infrared ray transmitting data to the card. (d) a receiving-only fixed station having a radio receiver for receiving data from the card; and (d) data using a combination of infrared rays and radio waves. Communication method.