JPH01140068A - Boat speed measuring apparatus - Google Patents

Abstract

PURPOSE:To accurately and automatically measure the time required in the sailing of each of a plurality of boats over a definite distance at every boat, by detecting the passage of each boat by the first and second laser beam emitter-detectors at each time when each boat passes the first and second reference lines. CONSTITUTION:A reflecting plate M, the first and second laser beam emitter- detectors 1A, 1B, a time data generating circuit 9, a ROM 7, a CPU 6 and a display part 12 are provided. At each time when each boat B passes the first and second reference lines, the passage of each boat B is detected by the beam emitter-detectors 1A, 1B and the time data at these detection points of time are stored in the ROM 7 in predetermined order and, at the point of time when the final boat B passes the second reference line, the sailing required time at each boat B is calculated by the CPU 6 to be displayed on the display part 12. By this method, the required time of each boat can be measured accurately and automatically.

Description

[Detailed Description of the Invention] "Industrial Application Field, j This invention is applicable to, for example, a boat racetrack where V number of boats sequentially form a line and sail a certain distance. This invention relates to a boat speed measuring device that automatically measures time by regarding it as boat speed.

``Prior art'' For example, at a boat racetrack, before a race, six boats take turns to test run in front of spectators.
The travel time required to sail the 50R, or so-called exhibition time, was measured on six boats and shown to the audience. In this case, the exhibition time was measured manually by a timer using a stopwatch.

[Problem to be solved by the invention J] By the way, in the conventional manual measurement using a stopwatch, it is necessary to measure six boats in a row, which is not only extremely complicated, but also due to individual differences among the measurers. etc., there was a problem of lack of accuracy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a boat speed measurement device that can accurately and automatically measure the travel time required for a plurality of boats to travel a certain distance.

``Means for Solving the Problems J'' This invention provides that when a predetermined number of boats sequentially pass between first and second reference lines set apart from each other by a certain distance along a course, In the boat speed measurement device that measures the time required to sail the certain distance as the boat speed, the boat speed measurement device includes a reflector plate provided on each of the boats, and a first and second moeki on the land side. first and second laser light emitting/receiving beams each installed on a reference line, emitting a laser beam toward the reflecting plate, and outputting a detection signal when detecting a laser beam reflected back from the reflecting plate; a time data generating means for generating time data; and a time data generating means for generating time data, each time a detection signal is supplied from the first and second laser projector/receivers. a storage means for storing in order, and a calculation means for calculating the required travel time for each boat based on the time data stored in the storage means when the predetermined number of boats have passed; The vehicle is characterized by comprising display means for displaying the travel time required for each suspect calculated by the calculation means.

[Operation, 1] According to the above configuration, each time a suspect passes over the first and second reference lines, the first and second laser projectors and receivers detect the passing of the suspect, and the The time data is stored in the storage means in a predetermined order, and when the last boat passes over the second reference line, the travel time required for each boat is calculated by the calculation means and displayed by the display means. Ru.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a diagram showing the electrical configuration of an embodiment of the present invention, Fig. 2 is a diagram showing the external configuration of the main body of the embodiment, and Figs. It is a figure which shows the example of installation of the laser emitter/receiver installed on the side.

First, in Figure 3 (a), I A and I B are boat B.
A predetermined distance L (-15
(++) There are two laser emitters and receivers installed apart from each other. The laser projector/receiver IA emits an infrared laser beam La in the width direction of the boat race course 2, that is, toward the opposite shore, and reflects it with a reflector M attached to the side of Suspect B's hull. The laser receiver 4a detects the returned infrared laser beam La.Similarly, the laser projector/receiver IB includes a laser projector 3.
b and a laser receiver 4b. In this case, as shown in FIG. 3(b), the laser projectors 3a, 3b
The laser beams L a and L b are deflected vertically at high speed by a scanner and are emitted. , a curtain of laser beams La and Lb is formed vertically. In addition, the laser receivers 4a, 4
b is a laser beam La.

When Lb is detected, detection signals Sa and Sb are output respectively.

Next, in FIG. 1, reference numeral 5 denotes the main body of the boat speed measuring device, which is installed at a place where the measuring staff is waiting.

In this main body 5, 6 is a CPU (Central Processing Unit) that controls each part of the device and calculates the travel time to be described later, 7 is a ROM (Read Only Memory) in which programs used in the CPU 6 are stored, and 8 is a RAM (random access memory) that temporarily stores various data. Further, 9 is a time data generation circuit that generates time data corresponding to the current time one by one in units of I/100 seconds, and IO is a time data output from the time data generation circuit 9, which is supplied by the above-mentioned detection signals Sa and Sb. This is an input circuit that temporarily latches the time data at the time when the time data is detected and outputs the latched time data to the CPU 6 together with the detection signals Sa and Sb. Further, reference numeral 11 is an operation unit that gives operation instructions to the CPU 6, and 12 is a display unit that displays the required cruising time calculated by the CPU 6. Here, as shown in FIG. 2, the operation unit 11 includes boat number buttons 81 to B for instructing the boat number, a measurement button B7 for instructing to start measurement, and an instruction to distinguish between automatic measurement and manual measurement. The display unit 12 includes six sets of 7-segment LED (light-emitting diode) displays DP for 5 digits.

It consists of ~ DP, and the required sailing time! It is displayed in units of 100 seconds. The display data supplied from the CPU 6 to the display unit 12 is also output to the external display device I3 and displayed to the spectators in the racetrack.

Next, the operation of the above-mentioned embodiment will be explained. In this case, 6 boats will form a line, and after mowing, they will move to the 1st and 2nd reference lines 2a, 2 in order, with an interval of about 80R apart.
During this period, the order of boats shall not change.

First, turn on the power button B shown in FIG. 2 to turn on the power, operate the mode switching button B to select automatic measurement, and then press the measurement button B7. As a result, the measurement operation in the automatic measurement mode is started.

Next, when the leading (first) boat passes over the first reference line 2a, the laser beam La emitted from the laser projector 3a is reflected by the reflector M of boat B, and the laser beam La is reflected by the laser receiver 4a.
come back to. As a result, the laser receiver 4a detects the passage of the boat B and outputs a detection signal Sa. Similarly, the detection signal Sa is output every time the second to sixth boats pass over the first reference line 2a. The input circuit IO temporarily latches the time data supplied from the time data generation circuit 9 every time the detection signal Sa is supplied, and outputs the latched time data to the CPU 6 together with the detection signal Sa. The CPU 6 stores the sequentially supplied time data T A + to T A e for the six boats in the RAM as shown in FIG.
Stored within 5.

Next, when the first to sixth boats pass over the second reference line 2b, the laser receiver 4 is activated in the same manner as described above.
Detection signals sb are sequentially output from the terminal b. The input circuit 10 temporarily latches the time data supplied from the time data generation circuit 9 every time the detection signal sb is supplied, and sends this latched time data to the CPU 6 together with the detection signal sb.
Output to. The CPU 6 inputs the time data TB, ~TBe for the six boats that are sequentially supplied, as shown in FIG.
Store in AMB.

Then, the CPU 6 determines the passage of six boats based on the number of times the detection signals Sa and Sb are supplied, and then uses the time data TA, ~TA, and TB stored in the RAMg.
, ~TB, the required navigation time T1~T for each boat
, respectively.

In this case, the required travel time T, ~T6 is determined from the following equation.

Tn=TB1-TAn (however, n= 1.2s=
, 6) The required sailing time T I"" T s calculated for each boat in this way is supplied to the display unit 12, and the LE
The D display devices D P + to DPa display the information in units of l/θ0 seconds, and the same display content is displayed to the spectators in the boat racecourse by the external display device 13.

Note that when manual measurement is selected using the mode switching button B8, only the required sailing time of the boat selected using the boat number buttons B and -B is calculated and displayed.

"Effects of the Invention" As explained above, according to the present invention, each time six boats pass over the first and second reference lines, the passing of the six boats is detected by the first and second laser emitter/receiver. The time data at the time of these detections is stored in a predetermined order in the storage means, and when the last boat passes over the second reference line, the travel time for each boat is calculated by the calculation means. Since the information is displayed on the display means, when a plurality of boats are lining up and cruising a certain distance one after another, it is possible to accurately and automatically measure the required cruising time for each boat. Furthermore, since a laser is used, there is also the effect of reducing measurement errors.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the electrical configuration of one embodiment of this invention, Fig. 2 is a plan view showing the external configuration of the main body of the same embodiment, and Figs. 3 (a) and (b) are the same embodiment. FIG. 4 is a plan view and a cross-sectional view showing an example of the installation of a laser projector installed on the land side, and FIG. 4 is a diagram showing data stored in the RAMB of the same example. B...boat, L...predetermined distance, M...
Reflector plate, IA... Laser emitter/receiver (first laser emitter/receiver), IB... Laser emitter/receiver (second laser emitter/receiver), 2... Boat race course, 2a...
...First reference line, 2b...Second reference line, 3a, 3b...Laser projector, 4a, 4
b... Laser receiver, 6... CPU (
calculation means), 7...ROM, 8...RAM (storage means)
, 9... Time data generation circuit (time data generation means), 12... Display section, DP, -DP8... LED indicator (display means)
. Applicant: Fukuoka Prefecture Motorboat Racing Association Yamaguchi Cinema

Claims (1)

[Claims] When a predetermined number of boats sequentially pass between first and second reference lines set at a fixed distance apart along a course, the cruising time required for each of these boats to travel the fixed distance. In a boat speed measurement device that measures time by regarding it as boat speed,
A laser beam is installed on a reflector plate provided on each of the boats and on the first and second reference lines on the land side, and emits a laser beam toward the reflector plate and reflects the laser beam back from the reflector plate. first and second laser emitters/receivers that output a detection signal upon detecting a laser beam; a time data generating means that generates time data; and a detection signal from the first and second laser emitter/receiver. storage means for storing the time data supplied from the time data generation means in a predetermined order each time the time data is supplied; and time data stored in the storage means at the time when the predetermined number of boats have passed. The system is characterized by comprising calculation means for calculating the required travel time for each boat based on the calculation means, and display means for displaying the required travel time for each boat calculated by the calculation means. Boat speed measuring device.