JP3943398B2 - Optical signal transmission system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical signal transmission system for transmitting an optical signal to a target such as a target used in shooting simulation, and more specifically, a target such as a vehicle or a human body within a target range. The present invention relates to an optical signal transmission system that transmits an optical signal while sweeping and driving a light projecting unit when transmitting an optical signal.
[0002]
[Prior art]
In shooting simulations and the like, when shooting a real or simulated bullet against a target, it may be somewhat dangerous because it must be taken close to the target to see if it hits. Therefore, in recent years, an optical signal that transmits information from the optical transmitter to the target and can confirm whether or not the target has been hit by the hit information included in the received light signal transmitted from the target. Transmission systems are widely used. For example, a laser beam containing information is emitted from the laser transmitter toward the target, and if the target hits, the target side sends hit information, etc., so the shooter side confirms the effectiveness indicating that it hits can do.
[0003]
FIG. 4 is a conceptual diagram of a conventional optical signal transmission system in a shooting simulation. As shown in FIG. 4, in the optical signal transmission system used for shooting simulation, an optical signal is emitted from the optical signal transmission device 12 toward a target such as a vehicle 18 or a person 19 by operating the switch unit 11. At this time, the optical signal transmission device 12 transmits the optical signal while sweeping it to all the vehicles 18 and persons 19 existing within a predetermined transmission range (that is, within the target range). Further, the vehicle 18 and the person 19 are respectively provided with receivers 18a and 19a, and emit light or emit smoke when receiving an optical signal. At this time, for example, when the vehicle 18 receives an optical signal from the optical signal transmission device 12, the vehicle 18 displays that the optical signal has been received by smoke or the like.
[0004]
FIG. 5 is a block diagram showing a configuration of the optical signal transmission system shown in FIG. The optical signal transmission device 12 includes a transmission unit 14 that sweeps and drives a projector 13 that transmits an optical signal, a reception unit 15 that receives an optical signal transmitted from a target (not shown), transmission control of the optical signal, and smoke and light emission. A control unit 16 that performs sound generation control and reception signal processing, and a display unit 17 that displays smoke, light emission, and sound generation.
[0005]
In FIG. 5, when transmitting an optical signal, the control unit 16 processes the emission signal and outputs it to the transmission unit 14 by operating the switch unit 11. Then, the transmission part 14 transmits an optical signal continuously, sweeping and driving the projector 13 by the emission signal. That is, since the beam of the optical signal transmitted from the projector 13 can irradiate only a certain range, the transmitter 14 irradiates a wide range by sweeping the projector 13. The receiving unit 15 receives an optical signal transmitted from the transmitter of the vehicle 18 or the human body 19 shown in FIG. 4, analyzes and processes the optical signal by the control unit 16, and then generates smoke or light emission by the display unit 17. And display pronunciation. Thereby, the effectiveness which shows that the optical signal hits the target can be notified outside.
[0006]
[Problems to be solved by the invention]
However, in the conventional optical signal transmission system, since one projector 13 is swept and driven, the receivers 18a and 19a of the stationary vehicle 18 and the human body 19 can surely transmit, but the vehicle 18 and the human body 19 move. You may not be able to receive those signals.
[0007]
FIG. 6 is a conceptual diagram showing a state in which an optical signal is swept to a target in a conventional optical signal transmission system. That is, as shown in FIG. 6, when the projector 13 is driven to sweep in the sweep direction as shown by the arrow in the figure and transmits an optical signal, the target 8 is at the same speed as the sweep speed or a speed faster than the sweep speed. When moving outside the target range (that is, in the direction of arrow a in the figure), the optical signal from the projector 13 cannot be applied to the target 8. That is, the optical signal cannot capture the target 8.
[0008]
As described above, in the conventional optical signal transmission system, although the projector 13 is swept within the target range, the target may be normally irradiated with the optical signal depending on the moving speed of the target. could not.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an optical signal transmission system in which no reception error occurs with respect to a target moving within the sweep range of the optical signal to be transmitted. There is.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, an optical signal transmission system according to the present invention is an optical signal transmission system that transmits an optical signal including information to a target that exists within a target range. a light projecting means, the light signal emitted from each of said light projecting means, is characterized in that and a sweeping drive means for irradiating sweeping so as to sandwich said target.
[0011]
According to the optical signal transmission system of the present invention, two light projecting means are provided to irradiate the target range while sweeping the optical signal so as to sandwich the target from both sides. Therefore, even if a target such as a vehicle or a person moves within the target range, it can be reliably received.
[0012]
At this time, the time for receiving the data of the minimum two data lengths required by the target is 2D [seconds], the transmission range which is the beam width of each light projecting means is S (m), and the data must be received reliably. Assuming that the moving speed of the target or the like is A [m / sec], the time T for sweeping each light projecting means within the range of the sweep distance L is
If T ≧ L / [(S / 2D) −A], a target moving at a moving speed A [m / sec] can be reliably received.
[0013]
Here, since (S / 2D) is the maximum sweep speed, the meaning of the above formula is one stroke sweep time ≧ sweep distance / (maximum sweep speed−target moving speed). That is, the one-stroke sweep time that each of the two light projecting means sweeps is the time obtained by dividing the sweep distance of each of the two light projecting means by the value obtained by subtracting the target moving speed from the maximum sweep speed. In this way, even if the target within the target range moves , the target can reliably receive the optical signal .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an optical signal transmission system according to the present invention will be described with reference to the drawings. An optical signal is a generic signal such as a laser beam, a near-infrared beam, or a visible beam. In particular, a laser beam that has high linear directivity and a small beam spread is preferably used. . The optical signal includes various information such as the signal transmission time, the type of transmission signal, the individual number of the transmission signal, the light receiving part of the target, and the distance to the target.
[0015]
FIG. 7 is an overall configuration diagram of an optical signal transmission system according to the present invention. In FIG. 7, this optical signal transmission system receives the reflected light of the optical signal transmitted from the transmission part 4 which transmits optical signals, such as a laser beam, a near infrared ray, and visible light, and the other transmission part 4. In FIG. A receiving unit 5 that converts the signal into an electric signal, a control unit 6 that analyzes the electric signal converted by the receiving unit 5, and reception information of the optical signal according to the analysis result of the control unit 6 by sound, light, smoke, etc. The display unit 7 is configured to be configured. The optical signal transmission system having such a configuration transmits / receives optical signals to / from a transmission / reception means attached to a vehicle or a person (not shown), evaluates the light reception content of the optical signal, and determines the transmission result. To do. At this time, when an optical signal is transmitted to a vehicle or a person within the target range irradiated by the transmission unit 4, sweep driving is performed so as to sandwich the optical signal irradiated from the transmission unit 4. Hereinafter, a method of performing sweep driving so as to sandwich an optical signal, which is a feature of the present invention, will be described in detail.
[0016]
FIG. 1 is a block diagram showing a configuration of an optical signal transmission system according to the present invention. This optical signal transmission system includes an optical signal transmission device 2 that transmits two systems of optical signals, and a switch unit 1 that performs an optical signal emission / stop operation on the optical signal transmission device 2. Further, the optical signal transmission apparatus 2 includes an A transmission unit 4a having a sweep drive unit (not shown) that sweeps and drives an A projector 3a that transmits an optical signal of the first system, and B that transmits an optical signal of the second system. B transmitter 4b having a sweep drive unit (not shown) that sweeps and drives the projector 3b, a receiver 5 that receives an optical signal transmitted from a target (not shown), and optical signal transmission to the A transmitter 4a and the B transmitter 4b A control unit 6 that performs control, smoke generation, light emission, sound generation control on the display unit 7 and reception signal processing for the reception unit 5, and a display unit 7 that displays smoke generation, light emission, sound generation, and the like.
[0017]
In FIG. 1, when an optical signal is transmitted toward a target (not shown), the control unit 6 controls and processes the emission signal by the operation of the switch unit 1 and outputs the signal to the A transmission unit 4a and the B transmission unit 4b. The A transmitter 4a continuously transmits an optical signal while sweeping and driving the A projector 3a by the received emission signal. At the same time, the B transmitter 4b also continuously transmits an optical signal while sweeping and driving the B projector 3b by the received emission signal. That is, since the beam of the optical signal transmitted from the A projector 3a and the B projector 3b can only irradiate a certain range, the A projector 3a and the B projector 3b are respectively swept to irradiate a wide range. The A projector 3a and the B projector 3b perform sweep driving in conjunction with each other so as to sandwich the target according to a certain rule. Details of the sweep driving of the A projector 3a and the B projector 3b will be described later.
[0018]
The receiving unit 5 receives an optical signal transmitted from a transmitter of a vehicle or human body (not shown) existing within the target range (hereinafter collectively referred to as a target), and is received by the control unit 6. After analyzing the optical signal, the display unit 7 displays sound generation, light emission, smoke, and the like. Thus, the validity information indicating that the optical signal has hit the target can be notified to the outside.
[0019]
Next, data included in the optical signal in the optical signal transmission system of the present invention will be described. In FIG. 1, the optical signal transmitted and received between the optical signal transmission device 2 and a target (not shown) includes the transmission time of the optical signal, the type of the transmission signal, the individual number of the transmission signal, the light receiving part of the target and the target. Various data such as distance is included. Therefore, in order to sweep the optical signal, it is necessary to transmit these data continuously. Therefore, in order for the target to reliably receive one data length, it is necessary to receive two or more data lengths at the receiving point.
[0020]
FIG. 3 is a conceptual diagram showing a data flow when the target receives data included in the optical signal. In FIG. 3, the time for the target to receive one data length is D seconds. 1 data, no. 2 data, no. 3 data... Flow in this order from the right to the left in the figure, and the target A and the target B at each point respectively acquire data at the points illustrated. Of course, no. 1 data, no. 2 data, no. 3 data are data having the same information content. Therefore, FIG. 3 means that data having the same information content is repeatedly transmitted.
[0021]
In FIG. Since data has been received from the beginning of one data,
If the data is flowing in the direction of the arrow in the figure, No. All of one data length of one data can be received in D seconds. However, target B is no. Since the data is received from the middle of one data, if the data is flowing in the direction of the arrow in the figure, no. The remaining portion of one data is received over a predetermined time. If one data length of two data is not received over D seconds, all data included in one data length cannot be received correctly. That is, when the target is at an arbitrary position, it is necessary to receive data of 2 data lengths over 2D seconds in order to accurately receive all data.
[0022]
Next, the sweep speed and sweep time of the projector that transmits the optical signal to the target will be described. The sweep speed of the projector is set based on the moving speed of a target such as a vehicle or a person, the necessary data length, and the number of duplicate receptions of the same data generated due to continuous transmission. In other words, when a target such as a vehicle or a person is stopped, all data of one data length can be received even if the sweep speed of the optical signal is increased, but the moving speed of the target such as a vehicle or person is set faster. When this is done, the optical signal sweep rate must be set slow in order for the target to correctly receive all data of one data length. That is, the relative speed between the target speed and the optical signal sweep speed must always be substantially constant. Further, in order to reduce the number of times the target receives data redundantly, it is necessary to set the sweep speed of the optical signal faster.
[0023]
FIG. 2 is a conceptual diagram showing optical signal sweep driving in the optical signal transmission system of the present invention. That is, this figure shows the concept when the optical signal is swept within the target range in the optical signal transmission system shown in FIG. As shown in FIG. 2, the A projector 3a and the B projector 3b sweep and drive the ranges of the respective sweep distances L by dividing the target range into two so as to sandwich the target. That is, when the A projector 3a is swept clockwise as indicated by the arrow in the figure, the B projector 3b is swept counterclockwise as indicated by the arrow in FIG. Cross each other). At this time, the optical signal of the A projector 3a and the optical signal of the B projector 3b partially overlap each other at the portion (intersection) sandwiching the target. Further, when the A projector 3a and the B projector 3b sweep in opposite directions, they are swept so that the optical signals transmitted from each other are separated from each other.
[0024]
That is, the A projector 3a sweeps the range of the sweep distance L while transmitting the light beam of the transmission range S. Similarly, the B projector 3b also sweeps the range of the sweep distance L while transmitting the light beam of the transmission range S. The sweep range (sweep distance L) of the A projector 3a and the sweep range (sweep distance L) of the B projector 3b partially overlap in the area sandwiching the target, but when the two sweep ranges are combined, a desired target range is obtained. It becomes.
[0025]
Here, the time for the target to receive one data length of the transmitted optical signal is D [second], the sweep distance of one projector is L [m], and the transmission range of the beam of one projector is S [m]. Then, the shortest sweep time Tmin of each projector 3a, 3b is given by the following equation (1).
Tmin = 2D × L / S [seconds] (1)
[0027]
Therefore, if the sweep time of each of the projectors 3a and 3b is set to (2D × L / S) [seconds] or more, the target within the target range can reliably receive all the codes of the optical signal. In other words, if the sweep time is shorter than (2D × L / S) [seconds], the target cannot receive all codes of the optical signal.
[0028]
Further, since each projector 3a, 3b sweeps the range of the sweep distance L with the shortest sweep time Tmin = 2D × L / S, the maximum sweep speed Vmax of each projector 3a, 3b is given by the following equation (2). It is done.
Vmax = L / (2D × L / S) = S / 2D [m / sec] (2)
[0029]
Here, in order for a target such as a vehicle or a human body to reliably acquire all data, the sum of the sweep speed actually driven by each projector 3a, 3b and the movement speed of the target is within the maximum sweep speed Vmax. Must. Therefore, the maximum sweep speed Vmax = (S / 2D) [m / sec], the sweep speed V [m / sec] at which each projector 3a, 3b is actually driven, and the target for which data must be received reliably. When the moving speed is A [m / sec], the following equation (3) is established.
Vmax ≧ V + A (3)
[0030]
Therefore, the following equation (4) is derived from the equations (2) and (3).
V ≦ Vmax−A = S / 2D−A (4)
From equation (4), the sweep speed V [m / sec] of each projector 3a, 3b must be smaller than the value obtained by subtracting the target moving speed A [m / sec] from the maximum sweep speed Vmax [m / sec]. I understand that I have to do it.
[0031]
Further, from the equation (4), the time T for actually sweeping each of the projectors 3a and 3b within the range of the sweep distance L is given by the following equation (5).
T ≧ L / V = L / [(S / 2D) −A] (5)
[0032]
As can be seen from equation (5), the time required to receive the data of the minimum two required data length is 2D [seconds], the transmission range which is the beam width of each projector 3a, 3b is S (m), and the data is surely received. Assuming that the moving speed of a target such as a vehicle or a human body that must be received is A [m / sec], the time T for which each projector 3a, 3b is swept within the range of the sweep distance L is [L / [(S / 2D ) -A]] [seconds] or more.
[0033]
Here, since (S / 2D) is the maximum sweep speed, the meaning of the above formula (5) is one stroke sweep time ≧ sweep distance / (maximum sweep speed−target moving speed). That is, the sweep time of one stroke in which each of the two projectors 3a and 3b is driven to sweep is divided by the value obtained by subtracting the moving speed of the target from the maximum sweep speed of each of the two projectors 3a and 3b. If the time is longer than the target time, even if the target within the target range moves , the target can reliably receive the optical signal .
[0034]
Next, in FIG. 2, it will be verified whether or not a false detection occurs for a target or an object moving within the target range. That is, in the optical signal transmission system of the present invention, two light projectors of the A light projector 3a and the B light projector 3b are used as the optical signal sweeping method so as to sandwich the target. As a result, the A projector 3a transmits an optical signal while being driven in the sweep direction (clockwise) of the arrow, so that even if the target 8 moves in the target range in the direction of the arrow a in FIG. Data can be received by irradiating a signal. Moreover, even if the target 8 tries to move to the right side of the figure, the target 8 can be irradiated with the optical signal swept by the B projector 3b.
[0035]
Thus, moving targets 8 in either direction, the target 8 can be reliably irradiated with the optical signal can be received data.
[0036]
That is, if the A projector 3a and the B projector 3b perform the sweep operation in a time of [L / [(S-2D) -A]] [seconds] or more, the vehicle or person in the target range, etc. When the target is moving at a maximum moving speed A [m / sec] or less, the target can reliably receive an optical signal . Further, by using two projectors, the sweep distance of each projector becomes half of the target range. Therefore, the target range can be swept in half the time when one projector is swept, and the number of times of receiving a plurality of data can be reduced as compared with the prior art.
[0037]
【The invention's effect】
As described above, according to the optical signal transmission system of the present invention , the target is irradiated within the target range while the optical signal is swept so that the target is sandwiched between the two projectors. Even if it moves in the same direction as the sweep direction of one of the two projectors, the other projector can reliably receive the optical signal.
[0038]
Further, according to the optical signal transmission system of the present invention, the sweep distance of each projector can be reduced to half of the target range by using two projectors and sweeping the optical signal in each area. Therefore, since the target range can be swept in half the time (double speed) compared to the case where there is only one projector, the target receives an optical signal even if the moving speed of the target in the target range is high. be able to. Moreover, since the number of times of receiving a plurality of data can be reduced, it is possible to obtain and analyze the received information earlier when the target is irradiated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an optical signal transmission system according to the present invention.
FIG. 2 is a conceptual diagram showing optical signal sweep driving in the optical signal transmission system of the present invention.
FIG. 3 is a conceptual diagram illustrating a data flow when a target receives data included in an optical signal.
FIG. 4 is a conceptual diagram of a conventional optical signal transmission system in a shooting simulation.
5 is a block diagram showing a configuration of the optical signal transmission system shown in FIG. 4. FIG.
FIG. 6 is a conceptual diagram showing a state where an optical signal is swept to a target in a conventional optical signal transmission system.
FIG. 7 is an overall configuration diagram of an optical signal transmission system according to the present invention.
[Explanation of symbols]
1, 11 Switch unit, 2, 12 Optical signal transmitter, 3a A projector, 3b B projector, 4a A transmitter unit, 4b B transmitter unit, 5, 15 receiver unit, 6, 16 control unit, 7, 17 display unit, 8 targets, 9 objects, 13 projectors, 14 transmitters.

Claims (1)

In an optical signal transmission system for transmitting an optical signal including information to a target existing within a target range ,
Two light projecting means for transmitting the optical signal;
The optical signal emitted from each of said light projecting means and sweep drive means for irradiating sweeping so as to sandwich the target,
An optical signal transmission system comprising:

Images