JPH0540159A - Multi-channel communication system - Google Patents

Abstract

PURPOSE:To enable positions of a number of traveling bodies to be communicated accurately and with a specific electric wave by allowing the traveling object and a ground station to measure a current position according to a received electric wave from an artificial satellite and by receiving an electric wave signal from the traveling object in time series. CONSTITUTION:Each traveling object and a ground station receive electric wave from an artificial satellite by satellite utilization position-measuring devices 3 and 9 and then measure and recognize each current position and current time. Each traveling object transmits a traveling object number, a current position, and a position-measuring satellite number from an electric wave transmission portion 5 at a transmission timing which is judged from the current time by the timer portion 6. The ground station receives this in time series by using an electric wave reception portion 7. An operation portion 10 performs operation based on these and then displays a position of each traveling object by a display portion 11. Therefore, this system automatically recognizes position information of the traveling object, obtains a position information of the traveling object only with a specific electric wave according to time control of transmission, thus enabling a number of traveling object positions to be communicated accurately and with a specific electric wave only.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives radio waves from an artificial satellite to measure the current positions of a mobile body and a ground station, and uses a specific radio wave by using time information obtained from satellite positioning means. To be able to communicate with many mobiles,
The present invention relates to a multi-channel communication system that recognizes a large number of current positions of mobile objects.

[0002]

2. Description of the Related Art As a conventional multi-channel communication system, for example, there is one as shown in FIG. In the figure, 1
Is a mobile transceiver provided in each of a number of mobiles, and the mobile transceiver 1 transmits data of the location of the mobile. Reference numeral 2 denotes a ground station transceiver provided in the ground station. The ground station transceiver 2 receives data from the mobile body transceiver 1 to determine the location of each mobile body. 2a is a display plate.

Next, the operation will be described. Ask the mobile transceiver 1 to send data on the location of the mobile,
The ground station receives this data to determine the location of the mobile unit.

[0004]

However, in such a conventional multi-channel communication system, the mobile unit transceiver 1 transmits data of the location of the mobile unit,
Since the ground station transceiver 2 receives this and determines the location of the moving body, when the number of moving bodies increases,
There are problems that communication between the mobile transceiver 1 and the ground station transceiver 2 becomes complicated, and that when the position of the mobile body is transmitted by a telemeter, as many radio waves as the number of mobile bodies are required.

The present invention has been made in order to solve the above-mentioned problems, and accurately locates a large number of moving bodies.
Moreover, it is an object of the present invention to obtain a multi-channel communication system capable of communicating only with specific radio waves.

[0006]

In a multi-channel communication system according to the present invention, a transmitting-side mobile body system uses a satellite-based positioning means for receiving radio waves from an artificial satellite to measure the current position of the mobile body, and this satellite. It has a moving body current position recognizing means for recognizing the current position of the moving body based on the positioning data of the using positioning means, and a transmitting means for converting the current position information of the moving body and information other than the current position into a radio wave signal for transmission. , The receiving ground station system recognizes the current position of the ground station based on satellite positioning means for receiving the radio wave from the artificial satellite and measuring the current position of the ground station, and the positioning data of the satellite positioning means. Ground station current position recognizing means, receiving means for receiving radio signals from many moving bodies in time series, and converting received radio signals into position data to recognize the current positions of many moving bodies. To those with the current position recognizing section, and a recognizing means converts the radio signal of the time information obtained from the global positioning means of the moving object.

[0007]

In the multi-channel communication system according to the present invention, the position information of the moving body is automatically recognized and the position information of the moving body can be obtained only by a specific radio wave by controlling the transmission at an accurate time. However, we have made it possible to accurately communicate the positions of many moving objects and only with specific radio waves.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 is a structural block diagram showing an embodiment of the present invention. In FIG. 1, the same or equivalent structural parts as in FIG. First, the configuration will be described. In the figure, 3 is a satellite-based positioning device which is a satellite-based positioning means of a mobile unit, 4 is a signal / radio converter for converting recognized position data into radio waves, and 5 is a radio wave for transmitting radio waves. A transmitting unit 6 is a timer unit that recognizes an accurate time obtained from the satellite-based positioning device 3 and creates a timing for transmitting a radio wave. The moving body includes the satellite-based positioning device 3, the signal / radio wave conversion unit 4, and the radio wave. It is composed of a signal unit 5 and a timer unit 6.

Reference numeral 7 is a radio wave receiving unit for receiving radio waves from a mobile body, 8 is a radio wave / signal conversion unit for converting received data into position data of each mobile body, 9 is a satellite-based positioning device which is a satellite-based positioning means, Reference numeral 10 is a calculation unit that performs calculation such as display from the position of each mobile unit and the position of the ground station. Reference numeral 11 is a display unit that displays the position of each mobile unit.
Radio wave / signal converter 8, satellite-based positioning device 9, calculator 10
And a display unit 11.

The satellite-based positioning devices 3 and 9 are, for example, four terrestrial antennas appropriately distributed by a global positioning satellite system (hereinafter abbreviated as GPS) as schematically shown in FIG. Of the 18 to 21 artificial satellites controlling the ground station via 12b, the current position of the moving body is measured based on the waves transmitted from the four artificial satellites S1 to S4 within the receivable area (field of view). It is a thing.

As shown in FIG. 3, the satellite-based positioning devices 3 and 9 are provided with a receiver 13 for receiving a required artificial satellite signal,
The signal processing unit 14 measures the current position of the moving body from the received signal and outputs a position signal corresponding to the current position. Further, as shown in FIG. 4, the satellite-based positioning devices 3 and 9 control a crystal oscillator 15 that outputs a reference frequency signal that is an overall timing control signal, and the operation timing of the signal processing unit 14 from the reference frequency signal. And a clock oscillation circuit 16 that forms a clock signal, and a microstrip antenna 17, a preamplifier 18, and a bandpass filter 19 connected to the preceding stage of the receiver 13.

The display unit 11 is composed of a display unit such as a liquid crystal display device, a light emitting diode display device and a cathode ray tube display device, a voice output unit, and a warning when altitude positioning is not performed. ing.

Further, the positioning accuracy of the satellite-based positioning devices 3 and 9 is deteriorated due to the position of the artificial satellite, the operation of the artificial satellite, the state of the ionosphere, etc. It may become. Also, for example, when traveling in a tunnel, obstacles on the ground make it difficult to transmit necessary radio signals,
Sometimes it becomes impossible. When the positioning accuracy of the satellite-based positioning devices 3 and 9 deteriorates, it varies depending on the deterioration coefficient and the electric field strength. The deterioration coefficient in this case is a coefficient that represents an increase in the positioning error determined by the geometrical relationship between the artificial satellite used and the moving body at the time of positioning, that is, the arrangement state of the artificial satellite used with respect to the movable body. And
When the deterioration coefficient becomes large, the positioning error also increases, and the positioning accuracy is reduced. The other cause of the decrease in the positioning accuracy is the decrease in the electric field strength. Then, when the deterioration coefficient becomes a predetermined value or more or the electric field strength becomes a predetermined value or less, the positioning error exceeds the allowable amount.

Reference numeral 20 is a reception state detecting means connected to the satellite-based positioning devices 3 and 9, and this reception state detecting means 20 is provided.
Is for detecting the deterioration coefficient and the electric field strength that reduce the positioning accuracy of the satellite positioning devices 3, 9. The deterioration coefficient can be obtained from the position data of the artificial satellites used for positioning because they are transmitted from each artificial satellite based on the result of tracking the artificial satellites by the ground antenna 12b and the data of the ground monitor station 12c. The electric field strength can be detected by the strength of the radio wave received from the artificial satellite.

Reference numeral 21 is a prohibiting means, which prohibits the satellite-based positioning devices 3, 9 when the deterioration coefficient detected by the reception state detecting means 20 is equal to or more than a predetermined value or the electric field strength is less than a predetermined value. Prohibiting the current position recognition of a mobile object based on positioning data.

Next, the operation will be described. In each mobile unit, the satellite-based positioning device 3 always recognizes the current position and always recognizes the positioning satellite number used for position calculation. In addition, the satellite-based positioning device 3 always recognizes the current time. Then, the timer unit 6 determines the transmission timing from the current time. At the time of transmission, the mobile body number, the current position, and the positioning satellite number are converted into radio waves, and the radio waves are transmitted from the radio wave transmission unit 5.

In the ground station, the satellite-based positioning device 9 always recognizes the current position and receives the radio wave of each mobile unit. Each mobile unit recognizes the mobile unit number, the mobile unit position, and the positioning satellite number from the received data. The satellite-based positioning device 9 measures and recognizes the improvement of position accuracy by the differential GPS system, which always positions the current position on the ground station side by the same artificial satellite as the moving body. The display position is calculated from the position data of the moving body and the position data of the ground station, and each moving body is displayed on the display unit 11.

Next, a specific example in which the above embodiment is applied to a golf course management system will be described with reference to FIG. For example, a GPS cart 26 and a telemeter transmitter 27 that oscillates its position signal are mounted on the golf cart 25, and the telemeter signal is received by, for example, a telemeter receiving antenna 28 of a club house. In addition, the clubhouse side also has its own GPS receiver 29 for differential G
The difference from the golf cart position received by the PS method is calculated. In the position signal transmission on the golf cart side, if each telemeter to which an ID number is assigned is sequentially transmitted using the clock of the GPS system, all the transmitters and receivers can have the same frequency, and the cost can be greatly reduced. Further, by inputting the player name, caddy, and cart ID number, it is possible to know which group is in which hole in which course, and if an input switch is provided on the telemeter, information from the caddy can also be fed back.

[0019]

As described above, according to the present invention, the constitution is composed of a large number of transmitting side mobile body systems and receiving side ground station systems, and the transmitting side mobile body system is constructed from an artificial satellite. A satellite-based positioning unit that receives radio waves to measure the current position and current time of the mobile unit, and a current position and current time of the mobile unit that recognizes the current position and current time of the mobile unit based on the positioning data of this satellite-based positioning unit. The receiving side ground station system has a recognizing means and a transmitting means for converting the current position information of the moving body and information other than the current position into a radio signal and transmitting the received current time every recognized time. A satellite-based positioning means for receiving the radio wave from the artificial satellite to measure the current position of the ground station, and a ground station position recognizing the current position of the ground station based on the positioning data of the satellite-based positioning means. Position recognition means, reception means for receiving radio signals from a large number of moving bodies in time series, and current position recognition means for converting the received radio signals into position data to recognize the current positions of a large number of moving bodies. Since the multi-channel communication system has the recognition means for converting and recognizing the radio signal of the time information obtained from the satellite-based positioning means of the mobile body, the position of a large number of mobile bodies can be accurately and only with a specific radio wave. The effect that communication can be performed and cost can be reduced can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of a multi-channel communication system according to the present invention.

FIG. 2 is a perspective view showing an outline of a global positioning satellite system.

FIG. 3 is an overall configuration diagram showing an example of satellite-based positioning means of the present invention.

FIG. 4 is a block diagram showing satellite-based positioning means of the present invention.

FIG. 5 is a perspective view showing a specific application example of the multi-channel communication system according to the present invention.

FIG. 6 is a configuration block diagram showing an example of a conventional multi-channel communication system.

[Explanation of symbols]

 3,9 Satellite-based positioning means

Claims (1)

[Claims] 1. A multi-channel communication system comprising a large number of transmitting side mobile systems and a receiving side ground station system, wherein the transmitting side mobile system receives radio waves from an artificial satellite to detect the current position and current time of the mobile body. A satellite-based positioning means for measuring the current position, a mobile-body current position and current time recognition means for recognizing the current position and current time of the mobile body based on the positioning data of the satellite-based positioning means, and current position information and current of the mobile body. The receiving side ground station system receives a radio wave from the artificial satellite and receives the radio wave from the artificial satellite to convert the information other than the position into a radio wave signal and transmits the radio wave signal at a certain arbitrary time according to the recognized current time. The satellite-based positioning means for measuring the current position of the ground station, the ground station current position recognition means for recognizing the current position of the ground station based on the positioning data of the satellite-based positioning means, and Receiving means for receiving radio signals from a moving body in time series, current position recognizing means for converting the received radio signals into position data to recognize the current positions of a large number of moving bodies, and satellite utilization of the moving body A multi-channel communication system comprising: a recognition unit that converts and recognizes a radio signal of time information obtained from a positioning unit.