JP2000137063A - Moving body measuring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize measurement not influenced from natural environment or the like and facilitate maintenance by synchronously transmitting radio signals of equal phase and different frequency from both sides of a running road, and receiving both the signals with a receiver provided on a moving body. SOLUTION: For example, a moving body measuring system measuring the lap time of a training horse is constituted of antennas 20, 21 fitted to sign posts 10 provided on both sides of the respective measuring points on a race road, and a small-sized wireless installation 30 fitted to each training horse. For example, signals of equal phase and different frequency are intermittently and repeatedly transmitted from the antennas 20, 21 as passing position detected signals at every decided time. The small-sized wireless installation 30 detects the position in the traverse direction of a passing point by the phase difference of the passing position detected signals received from the antennas 20, 21, and for example, the transmitting timing of the own ID signal transmitted during intermittent stop of the passing position detected signal is made different according to the detected passing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object measuring system, and more particularly, to an individual identification of a moving object passing through each point of the running path when the moving object runs on a predetermined running path and the passing time. The present invention relates to a moving object measurement system for measuring the distance.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing a training horse lap time measuring system at a racetrack, which is an example of a conventional moving body measuring system of this type. In FIG. 5, reference numeral 100 denotes a measuring gate, and 101 denotes a bar code. A reading device, 102 indicates a bar code slip, and 103 indicates a reading area. The training horse lap time measuring system is a torii-type measuring gate 100 provided with a barcode reader 101 on the ceiling at each point of the racetrack.
Is installed. On the other hand, the training horse is provided with a bar code slip 102 having an identification code (hereinafter, also referred to as ID) for identifying each horse attached to the buttocks of the horse.
00, and the bar code slip 102 is
When the bar code number 3 is entered, the ID is read by the barcode reading device 101, the lap time is calculated based on the read time, and the data is output as data.

[0003] The bar code reader 101 is configured to irradiate a laser beam toward the bar code slip 102 and receive a reflected beam to read the bar code, thereby preventing a horse trained by a jockey from passing through. It is installed at a height of about 10 m above the ground using the measurement gate 100 so that there is no gap.

[0004]

As described above, the conventional moving object measurement system is configured to irradiate a laser beam and optically read a bar code with reflected light, so that the bar code reader becomes dirty or rainy. The reading accuracy is greatly deteriorated by natural environment such as fog and the like. When a plurality of moving objects (training horses in the training horse lap time measurement system) pass through the measurement gate at once, it becomes difficult to identify each horse. Also, the torii-type measuring gate is a great visual obstacle for the training horse, and hinders the training. In addition, the barcode reader becomes dirty during use, so periodic cleaning work is required.However, it is a special work in high places, so maintenance costs are high, and furthermore, maintenance work cannot be performed during use. There was a point.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and is not particularly affected by a natural environment, dirt, and the like, is easy to maintain, and can reduce a visual influence. It is intended to provide.

[0006]

SUMMARY OF THE INVENTION A moving object measuring system according to the present invention is characterized in that one or more moving objects traveling on a predetermined traveling path are traversed at each desired point on the traveling path in the transverse direction of the traveling path. In a mobile measuring system that measures which position of the vehicle, two antennas provided on both sides of the travel path at each of the desired points and transmitting in-phase wireless signals at different frequencies and in synchronization with each other, A receiver provided for each mobile unit receives a radio signal from each of the two antennas, and determines a position in the transverse direction of the travel path of the mobile unit based on a phase difference between the radio signals. It is characterized by having a means for measuring.

[0007] Further, in a moving object measuring system for performing identification of a moving object passing through a predetermined traveling path or a plurality of moving objects at each desired point on the traveling path and measuring a passing time. A wireless device (hereinafter referred to as a management wireless device) provided on both sides of the travel path at each desired point.
Antennas for transmitting the same-phase intermittent radio signals in synchronization with different transmission frequencies from each other, and radio devices (hereinafter, referred to as small radio devices) respectively provided in the moving bodies, from the two antennas. Means for receiving each intermittent radio signal, measuring a position in the transverse direction of the traveling path by the moving body based on a phase difference between the radio signals, the small radio device receiving the intermittent radio signal Means for sending back its own ID to the management wireless device at a predetermined timing allocated based on the position of the moving object in the transverse direction of the traveling path during the first stop period of the intermittent radio signal, The wireless device is provided with a means for identifying an individual of a moving object which has passed and mounted on the small wireless device at the timing of receiving an ID from the small wireless device and detecting a passage time. The features.

[0008] Further, when the management radio apparatus receives the same ID a plurality of times, the management radio apparatus is provided with means for setting the time point at which the ID having the highest reception strength is received as the passing time. Further, the radio signal or the intermittent radio signal transmitted from each of the two antennas is a signal having the same phase and the same frequency but different polarization planes or modulation codes.

The mobile object measuring system according to the present invention has the above-described configuration, so that it is not necessary to optically read a barcode, and the system can be made resistant to dirt and easy to maintain.
Also, there is no need to use high and large gates.
When used in a horse race, a boat race, or the like, a system having a small visual influence can be provided.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The moving object measurement system of the present invention
It is an invention that can be implemented not only as a training horse lap time measurement system, but also as a lap time measurement system at a bicycle racetrack or a boat racetrack, a delivery management system in the freight transportation business, a vehicle management system at a parking lot, an automatic charging system at a toll road, etc. Hereinafter, an embodiment of the present invention will be described using a training horse lap time measurement system as an example, as in the conventional technique.

FIG. 1 is a perspective view showing the configuration of the entire training horse lap time measuring system of the present invention. As shown in FIG. 1, the present system is attached to sign posts 10 provided on both sides of each measurement point on a racetrack, and is connected to a not-shown radio device (hereinafter referred to as a management radio device). And a small wireless device 30 attached to the buttocks of each training horse. Antenna 20,
From 21, for example, radio signals having the same phase and different frequencies are intermittently and repeatedly transmitted at predetermined time intervals, respectively (this radio signal is referred to as a “passing position detection signal”. Alternatively, wireless signals having different modulation codes may be used). FIG. 2 shows an example of the passing position detection signal, which is transmitted for 10 mms (millimeter second) (S1, S2, S2...), And then transmitted for 5 mms.
, The transmission is stopped (t1, t2, t3...), And the passing position detection signals from the antennas 20 and 21 have the same phase and different frequency (polarization plane or modulation code). To send.

When the small radio device 30 attached to the training horse receives the passing position detection signal from the antennas 20 and 21, during the transmission suspension period (that is, when the passing position detection signal is received in the period S1, the small radio device 30 is t1). , S2, t2,...) Returns its own ID to the management wireless device. Therefore, the management wireless device can identify the individual that has passed the sign pole and detect the passing time according to which transmission suspension period (that is, t1, t2, t3,...) The ID is received, and record the time. become able to.

However, the problem here is when a plurality of trained horses pass at once. For example, when two training horses pass as shown in FIG. 1 during the period t1 and receive the passing position detection signal, and each of the small wireless devices 30 returns the ID to the management wireless device at the same time, In the management wireless device, a plurality of IDs are returned in conflict with each other and cannot be identified. Therefore, the present invention is configured to avoid conflict of a plurality of IDs by adjusting the timing of transmitting the ID according to the passing position in the transverse direction (short direction) of the traveling road.

That is, as shown in FIG. 3, the training horse is d2 from the right sign post and d2 from the left sign post.
Passing through the point A at a distance of
1, when the small wireless device 30 has passed the distance L2 from the antenna on the left side), as shown in FIG. 4, how much the phases of the passing position detection signal from the antenna 20 and the passing position detection signal from the antenna 21 are different. The small wireless device 30 detects the transverse position of the passing point A (that is, the distance d1 / d or d2 / d) depending on whether the phase difference is generated. That is, as shown in FIG. 4, when the signal passes through the center (indicated by C), the phase difference between the passing position detection signals received from both antennas 20 and 21 is 0, but the passing position is shifted to somewhere. In this case, the phase difference is shifted by ± φ according to the shift (for example, when passing through the point A, the phase difference is −Δφ). Therefore, the own small wireless device 30 can uniquely know the position in the transverse direction that has passed by the detected phase difference ± φ.

Then, each of the small radio devices 30 is intermittently stopped during the passage position detection signal (when the received passage position detection signal is S
1 in the case of t1, in the case of S2 t2, etc.), the own ID is returned. However, as shown in FIG. 4, the transmission time is changed depending on the passing position (for example, A) in the transverse direction of the own device. Send. That is, if the vehicle passes the sign pole 11 immediately, the ID is returned immediately after the transmission (for example, S1) is completed, but if the vehicle just passes the center, for example, 2.2.
After elapse of mms, the ID is returned after elapse of 3.7 mms when passing through the point A, and after elapse of 4.7 mms when passing directly beside the sign pole 10. Since the ID is a simple ID that can identify itself, only about ten and several bytes are required, and ten or more IDs can be clearly distinguished and transmitted within 5 mms.

In this embodiment, the passage time of 15
Although it is not possible to distinguish between millimeters and millimeters, this is more accurate than in the case of using a conventional bar code slip, and is a sufficient measuring ability for measuring lap times in bicycle races, horse races and boat races, and does not pose a problem. Further, when the same ID is received a plurality of times by the management wireless device (that is, when the small wireless device receives the passing position detection signal in both S1 and S2 in FIG. 2 and returns its own ID in both t1 and t2) ), The time when the ID having the strongest reception electric field strength is received may be determined as the transit time.

Further, in the present system, the passing position of each sign post can be detected every time the sign post passes, so that information such as how the trained horse passed while meandering can be obtained, and a simple information can be obtained. It becomes possible to grasp the running characteristics. In addition, since it is configured to transmit and receive radio waves, the antenna is relatively resistant to dirt and the like, and the antenna may be installed at a height of 1 to 2 m above the passing height of the small wireless device 30,
The sign post can be low and simple, and the system can be easily maintained.

In the above-described embodiment, the passing position detection signal is received by the small wireless device, and its own ID is returned.
Although it is a system that can perform individual identification of a moving object, detection of the passing time, and detection of the passing position in the transverse direction, for example, a system for the purpose of only detecting the passing position in the transverse direction may be used. What is necessary is just to provide the structure provided only.

[0019]

As described above, the moving object measuring system of the present invention can construct a system which is less affected by the natural environment, dirt, etc., can be maintained easily and inexpensively.
When used in horse races, boat races, and the like, there is an effect that a system with little visual influence can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a passing position detection signal (intermittent wireless signal) transmitted from the antennas 20 and 21 in FIG.

FIG. 3 is a diagram for explaining the operation of the embodiment shown in FIG. 1;

FIG. 4 is a diagram for explaining the operation of the embodiment shown in FIG. 1;

FIG. 5 is a perspective view showing an example of a conventional moving object measurement system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sign post 20, 21 Antenna 30 Small radio equipment

Claims (4)

[Claims] 1. A moving object measurement for measuring a position in a cross direction of a traveling path of a single or a plurality of moving objects traveling on a predetermined traveling path at each desired point on the traveling path. In the system, two antennas provided on both sides of the travel path at each of the desired points and transmitting in-phase radio signals in different frequencies and in synchronization with each other, a receiver provided in each mobile object, Means for receiving respective radio signals from the two antennas and measuring a position in the transverse direction of the travel path of the moving object based on a phase difference between the respective radio signals. Body measurement system. 2. A moving object measuring system for performing individual identification of a moving object passing through a predetermined moving object or a plurality of moving objects traveling on a predetermined traveling path at each desired point on the traveling path and measuring a passing time. Two antennas that are provided on both sides of the travel path at each of the desired points and transmit in-phase intermittent radio signals from a radio device (hereinafter, referred to as a management radio device) in synchronization with different transmission frequencies. A wireless device (hereinafter, referred to as a small wireless device) provided in each mobile unit receives each intermittent wireless signal from the two antennas, and the mobile unit is connected to the traveling path by a phase difference between the wireless signals. Means for measuring which position in the traversing direction of the moving object, the small radio device receiving the intermittent radio signal, during the first stop period of the intermittent radio signal, traverses the traveling path of the moving body. Means for returning its own ID to the management wireless device at a predetermined timing allocated based on the passing position in the direction, wherein the management wireless device is mounted with the small wireless device at a timing of receiving the ID from the small wireless device. A means for performing individual identification and detection of a passing time of a moving object that has passed through the moving object measurement system. 3. The mobile object measurement system according to claim 2, further comprising: a unit that, when receiving the same ID a plurality of times, sets a point in time when the ID having the highest reception strength is received as the passage time. A moving object measurement system, characterized in that: 4. The mobile object measurement system according to claim 1, wherein the radio signals or the intermittent radio signals transmitted from the two antennas respectively have the same phase, the same frequency, a polarization plane, A moving object measurement system characterized by using signals having different modulation codes.