JP2007093313A - Position coordinate detection method and system device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the inconvenience of separately requiring transmitting the coordinate information of a detected position by some communication means, because of the inability of calculation on own coordinate position at the detected position. <P>SOLUTION: Sound waves and light are synchronously transmitted from a plurality of transmission positions whose position coordinates are known, the distances from the transmission positions are measured at a receiving position whose coordinates are wanted to detect, based on differences in arrival time of the respective sound waves and light from the transmitting positions, and coordinate calculation is performed based on the distances from the respective transmission positions, thus the problem is solved. Furthermore, a solution means is provided for dispensing with a separate communication means by causing the sound waves or light transmitted from transmitting parts to carry transmitted information, thereby using the respective media not only as distance measurement means, but also as means allowing information transmission. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a position coordinate detection method and information transmission using sound waves and light.

  Conventionally, coordinate detection of a position to be detected has been performed by calculating coordinates based on distance information between a plurality of known coordinate positions and a position to be detected. As a method for this, a sound wave is transmitted from a coordinate position to be detected and the incoming time of the sound wave is measured at a plurality of known coordinate positions. Then, distance information between each known coordinate and a position to be detected is obtained from each difference in the incoming time of the sound wave measured at each known coordinate position, and the position coordinate to be detected is calculated based on this distance information. Moreover, the sound wave used is used only for distance measurement.

  However, the conventional position coordinate detection method cannot calculate the coordinates at the position to be detected, and in order to know the coordinates at the position to be detected, there is a problem in that it is necessary to separately transmit the coordinate information to the detection position by some communication means. . An object of the present invention is to solve such a problem that separate communication means are required.

  In order to solve this problem, the invention of claim 1 synchronizes and transmits sound waves and light from a transmission position where a plurality of position coordinates are known, and at each reception position of the coordinates to be detected, A position coordinate detection method and a system device for obtaining a coordinate of a reception position by measuring a distance from a transmission position from a difference in arrival time and calculating coordinates based on the distance from each transmission position.

  The invention of claim 2 includes a light emitting element at an unspecified position that separates a sound wave transmission position and a light transmission position, transmits a sound wave from a transmission position where a plurality of position coordinates are known, and transmits the sound wave synchronously with the sound wave, Measure the distance from the transmission position from the difference in arrival time between the sound wave transmitted from the transmission position and the light emitted from the light emitting element at the reception position of the coordinate to be detected, and based on the distance from each sound wave transmission position A position coordinate detection method and system apparatus for obtaining coordinates of a reception position by calculating coordinates.

  According to a third aspect of the present invention, there is provided a position coordinate detection method in which transmission information is conveyed by sound waves or light transmitted from a transmission unit, and each transmission medium has not only a distance measurement means but also a means for sending information, and It is a system unit.

  According to the present invention, the coordinate calculation cannot be performed at the position where the detection is desired, and there is no inconvenience transmitted to the detection position by any other communication means, and the coordinate calculation at the detection position can be performed.

  Further, the second aspect of the present invention can be configured to pour light emission, and can cope with light attenuation.

  The third aspect of the present invention can transmit necessary information to the receiving position in a timely manner, and does not require a new communication means.

  FIG. 1 synchronously transmits sound waves and light from a transmission position where a plurality of position coordinates are known, and measures the distance from the transmission position from the difference in arrival time of each sound wave and light from the transmission position at the reception position, 1 is an example of a configuration diagram of a position coordinate detection method and a system apparatus that detect coordinates of a reception position by calculating coordinates based on a distance from each transmission position. Here, a transmission position where the position coordinates of three locations are known is considered. The sound wave and light transmitter 3 positioned at the known coordinate A, the sound wave and light transmitter 4 positioned at the known coordinate B, and the sound wave and light transmitter 5 positioned at the known coordinate C are controlled by the transmission control unit 2, respectively. Transmits sound waves and light simultaneously. In the transmission control at this time, transmission is performed for each known coordinate according to the time schedule without simultaneously transmitting the three transmitters. In order to increase reliability, the transmission period is set to be different for each transmitter, and each transmission can be identified by the transmission position. Now, it can be considered that the transmitted sound wave and light are transmitted to the receiving position almost simultaneously with the transmission in a space within a range of several tens of meters. A sound wave travels over a period of time depending on the distance because its propagation speed is very slow compared to light. For this reason, the difference between the arrival time of the sound wave and the light differs depending on the distance to be measured, and it can be regarded as the propagation time of the sound wave. The propagation speed of sound waves is generally known, and the distance from the transmission position can be calculated by calculating the propagation time. In general, when the distance or distance ratio from three known positions is known, one point in the two-dimensional space is specified, and the coordinates of the reception position, which is the position to be detected, can be obtained by the reception unit.

  It is also possible to carry information on sound waves and light used for distance measurement, and if the coordinate information of the transmitter is transmitted as the carry information, it corresponds to the dynamic position change of the transmitter which is a known coordinate. I can do things.

  FIG. 2 includes a light emitting element at an unspecified position that transmits a sound wave from three transmission positions whose position coordinates are known, and transmits the sound wave in synchronization with the sound wave. A position characterized by detecting the coordinates of the reception position by measuring the distance from the transmission position from the difference in arrival time of the emitted light and calculating the coordinates based on the distance from each sound wave transmission position It is a block diagram of a coordinate detection method and a system apparatus. The difference from FIG. 1 is that a plurality of light transmitting sections are arranged at unspecified positions. The arrival time of light remains the same as the transmission. Here, optical elements are arranged at a plurality of unspecified positions to cope with the attenuation of the amount of light generated in the light emission from the fixed position, and in this way, the light is poured into the light without considering the attenuation of the light. It is to cover a wide range.

  In addition, if the signal from the transmitter can be identified by changing the carrier frequency of the sound wave and light emitted from the transmitter for each transmitter, the transmission timing may be generated simultaneously.

  Also, known coordinates need not be fixed. It is possible to know the known coordinates while moving.

  As an example of this, the position coordinate detection method and system apparatus according to claim 3 for transmitting transmission information to sound waves and light in the configurations of FIGS. 1 and 2 will be introduced. The conveyance information is a position coordinate of the transmitter. Since the position coordinate of the moving transmitter can be accurately grasped by the position coordinate detection method and system apparatus of the present invention, the current position of the transmitter itself can be known while moving. This information is transmitted as known coordinates. In this way, all transmitters are networked to cope with dynamic position changes.

  Moreover, even if many transmission positions are installed to secure a wide area, it is not necessary to operate all transmitters having known coordinates. A necessary part of the plurality of transmitters may be operated in accordance with the movement of the position to be detected, and the operation may be performed by following the coordinate position to be detected.

  Further, the transmitter may use the same carrier frequency where it is not affected by the sound wave or light emitted from another transmitter.

  Furthermore, the medium for transmitting the transmission information may be either a sound wave or light.

  FIG. 3 is a configuration diagram of a detection method and a system device that have been conventionally used. In the operation, a sound wave is transmitted from the coordinate position 11 to be detected, and the sound wave reception time is measured by the sound wave receivers 11, 12 and 13 located at the known coordinates A, B and C. Then, the distance information between each of the known coordinates A, B, and C and the position 11 to be detected is obtained from the difference in the incoming time, and the coordinates of the position 11 to be detected are calculated based on the distance information. . Moreover, the sound wave used is used only for distance measurement.

  The position coordinate detection method and system apparatus according to the present invention have applicability to a free track moving body that receives a movement instruction while grasping its own position when the coordinate position to be detected is a moving body.

The sound wave and light are transmitted synchronously from the transmission position where multiple position coordinates are known, and the distance from the transmission position is measured from the difference in arrival time of each sound wave and light from the transmission position at the reception position. FIG. 2 is a configuration diagram of a position coordinate detection method and a system apparatus that detect coordinates of a reception position by calculating coordinates based on a distance from a position. A sound wave is transmitted from a transmission position where a plurality of position coordinates are known, and a light emitting element at an unspecified position that transmits synchronously with the sound wave is provided, and a sound wave transmitted from the transmission position and a light emitted from the light emitting element at a reception position. A position coordinate detection method and system for detecting a coordinate of a reception position by measuring a distance from a transmission position from a difference in arrival time and calculating coordinates based on a distance from each sound wave transmission position It is a block diagram of an apparatus. It is a block diagram of the conventional position coordinate detection method and apparatus using a sound wave.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coordinate position to detect 2 Transmission control part 3 Sound wave and light transmitter located in known coordinate A 4 Sound wave and light transmitter located in known coordinate B 5 Sound wave and light transmitter located in known coordinate C 6 Light emitting element at specific position 11 Coordinate position to be detected 12 Reception control unit 13 Sound wave receiver located at known coordinate A 14 Sound wave receiver located at known coordinate B 15 Sound wave receiver located at known coordinate C

Claims (3)

  The sound wave and light are transmitted synchronously from the transmission position where multiple position coordinates are known, and the distance from the transmission position is measured from the difference in arrival time of each sound wave and light from the transmission position at the reception position. A position coordinate detection method and a system apparatus for detecting a coordinate of a reception position by calculating coordinates based on a distance from the position.   It includes a light emitting element at an unspecified position that emits a sound wave from a transmission position where a plurality of position coordinates are known, and transmits the sound wave in synchronization with the sound wave. Position coordinate detection method and system apparatus for measuring a distance from a transmission position from a difference in arrival time and detecting coordinates of a reception position by calculating coordinates based on the distance from each transmission position . The position coordinate detection method and system apparatus according to claim 1 or 2, wherein the transmission information is conveyed by a sound wave or light transmitted from the transmission unit.

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