JPH10320656A - Entry detection display device - Google Patents

Abstract

(57) [Summary] [Problem] To prevent entry by recognizing that the area is an entry-prohibited area, and to enable the operator who operates the equipment at the construction site to recognize the presence of the entry person. SOLUTION: In a plurality of cordless display units which are provided with a battery cell 2 and a luminous body 3 at a construction site and perform blinking lighting, a pulse light ON / OFF light by a light beam is reset separately from the luminous body 3 by a reset light pulse. A light emitting means 4 for outputting R to another display unit 1 and a light receiving means 5 for receiving a reset light pulse R sent from the light emitting means 4 output by another display unit 1 and generating a reset signal for each reset light pulse. And a timer control means 6 for receiving a reset signal and initializing a timer value, wherein the reset signal is not obtained within a predetermined time and the timer
At the time of P, the output of the light emitting means 4 is inhibited for a certain period of time, and the entry is detected by changing the blinking cycle of the light emitting body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for detecting an object entering a construction site or the like with a plurality of display units.

[0002]

2. Description of the Related Art Conventionally, in construction sites and the like, it is necessary to restrict the entry of movable equipment such as construction equipment and heavy equipment into the work area in order for construction equipment and heavy equipment to work safely. Many construction sites are equipped with cones or guards to prevent accidental entry into the work area. During nighttime work, lights were added to the cones and guards to indicate danger areas.

In recent years, with the improvement of battery cells, miniaturization and high capacity have been promoted, and a cone-shaped or guard-shaped display device incorporating a battery cell that lights and blinks at night and a luminous body has been known.

FIG. 6A shows a cone-shaped illumination lamp (display unit) 11a having a halogen lamp 13 and a battery 12 therein. FIG. 6B shows the LED group 13.
A display unit 11b having a portable flasher provided with a rechargeable battery 12 and an upper part of the cone. FIG. 6C shows FIG.
It is a guard-shaped display unit 11c provided with the portable flasher shown in (b).

[0005] In the above-mentioned prior art, the approach of the approach is prevented by making the intruder recognize that the area is an inaccessible area by the illumination of the lighting device.

[0006]

In the above-mentioned conventional configuration, the entry is prevented by recognizing that the area is a no-entry area, and the operator who operates the equipment at the construction site recognizes the presence of the intruder. However, there is a problem that it cannot be performed.

[0007] That is, the work of construction equipment and heavy equipment with a lot of blind spots is very dangerous. Especially when there is a person in the work area, the presence of the operator who operates the heavy equipment cannot be confirmed and an accident occurs. There is a danger of doing.

Therefore, a safety checker who separately checks the safety of work is placed around the excavator or the like, and the safety checker constantly checks the safety on the right side and the back side, which is a blind spot of the excavator, to prevent suddenly operating heavy equipment. A work area for dealing with turning was secured.

[0009] However, in order to save labor costs, generally, only a minimum number of safety checkers are arranged at the construction site, and they are not arranged for every dangerous heavy equipment.

[0010] For this reason, inadvertently dangerous situations such as at night or when there is no visibility or when there is a slight absence of a safety checker or attention is paid to other things, an inexperienced infant or child who is not able to judge the situation is unexpectedly dangerous. When entering the area, or when accidentally entering the dangerous area due to carelessness, there is a problem in safety confirmation.

[0011] Therefore, what is desired is to inform a person sitting in an operation seat for operating heavy equipment of a danger such as the presence of an intruder directly into a blind spot or the like.

An object of the present invention is to provide an entry detection display device which can prevent entry by recognizing that the area is an entry-prohibited area, and can recognize the presence of the entry person by a worker who operates the equipment at the construction site. Aim.

[0013]

SUMMARY OF THE INVENTION An approach detection display device according to the present invention includes at least a battery cell and a luminous body, which indicates a dangerous area at a construction site or the like, in order to solve the above-mentioned problems of the prior art. A plurality of display units that perform cordless blinking and lighting, wherein a light emitting means for outputting pulsed ON / OFF light by a light beam as a reset light pulse to another display unit separately from the light emitting body; and the other display unit. Light receiving means for receiving a reset light pulse sent from the light emitting means output by the light emitting means, generating a reset signal for each reset light pulse, and timer control means for receiving the reset signal and initializing a timer value, When the reset signal is not obtained within a predetermined time and the timer is up, the output of the light emitting means is turned on for a predetermined time. While Nhibitto, and performs display of the entry detected by changing the blinking period of the light emitter.

[0014] At least one of the light receiving element of the light receiving means and the light emitting element of the light emitting means is rotatable in a horizontal direction, and an angle adjusting means for adjusting the axial directions of the light receiving element and the light emitting element to different angles is provided. It is preferred to do so.

Further, if the light receiving element is provided in a cylindrical concave hole for restricting the direction of entry of the reset light pulse, it is effective even in the daytime.

(Operation) With the above configuration, the present invention can perform the following operation. That is, a plurality of cordless display units each include a light emitting unit that outputs a reset light pulse to another display unit and a light receiving unit that creates a reset signal from a reset light pulse sent from another, and a timer value is set by the reset signal. When the timer control means to be initialized does not obtain a reset signal within a predetermined time and the time is up, the output of the light emitting means is inhibited for a certain time, so that the reset light pulse is interrupted due to a person's approach or the like, and the position is reset. However, when the time UP occurs, the output of the reset light pulse is successively inhibited for a certain period of time, so that the time UP can be generated in all the subsequent display units. Therefore, the operator can easily confirm the occurrence of the approach even if the approach has occurred within the blind spot, based on the blinking cycle of the light emitter of the last display unit placed in the dangerous area. In addition, the intruder can also detect an unusual change from the change in the blinking cycle, and the safety ascertainer can easily specify the approach location of the intruder from the change position in the blinking cycle.

Also, at least one of the light receiving element and the light emitting element is configured to be rotatable in the horizontal direction and provided with angle adjusting means for adjusting the optical axis direction to different angles, so that the light on the light receiving side and the light emitting side are provided. The optical axis of the beam can be adjusted to an arbitrary angle that is relatively different, and a plurality of display units can be arranged in an arbitrary shape according to the construction site.

Furthermore, if the light receiving element is provided in a substantially cylindrical concave hole for limiting the direction of entry of the reset light pulse, the sunlight inside the cylindrical concave hole can be used even during daytime construction. Only the reset light pulse by the light beam can be easily detected without being directly affected.

[0019]

FIG. 1 shows an embodiment of the present invention.
This will be briefly described with reference to FIGS.

The approach detection display device 1 of the present invention is a plurality of cordless display units which include at least a battery cell 2 and a luminous body 3 and which perform blinking lighting in a cordless manner. Apart from the light emitter 3, the light emitting means 4 outputs pulsed ON / OFF light by a light beam as a reset light pulse R to another display unit 1 and the light emitting means 4 output from the other display unit 1. A light receiving means 5 for receiving a reset light pulse R and generating a reset signal 5c for each reset light pulse, and a timer control means 6 for receiving the reset signal 5c and initializing a timer value are provided. When the reset signal 5c is not obtained within a predetermined time and the timer 6a is up, the output of the light emitting means 4 is inhibited for a certain time. While DOO, performing the display of the entry detected by changing the blinking period of the light emitter 3.

At least one of the light receiving element 5b of the light receiving means 5 and the light emitting element 4a of the light emitting means 4 is configured to be rotatable in the horizontal direction, and the axial directions of the light receiving element 5b and the light emitting element 4a are adjusted to different angles. And angle adjusting means X.

Further, the light receiving element 5b is provided in a cylindrical recess 5a for limiting the direction of entry of the reset light pulse R.

The entry detection display device 1 of the present invention configured in such an embodiment prevents the entry by recognizing that the area is an entry-prohibited area, and also allows the operator who operates the equipment at the construction site to himself / herself. This has the effect that the presence of an intruder can be recognized.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show an embodiment of the present invention. FIG. 1 shows a case where the present invention is applied to a group of cordless display units having a cone shape.
The display unit 1 includes a light emitter 3, a light emitting unit 4, a light receiving unit 5, and a control unit 6.

This cone-shaped display unit group indicates that the area is a danger area at a construction site or the like by blinking the light emitter 3 using the power of the battery cell 2. In addition to the light-emitting body 3, a light-emitting means 4 for outputting pulsed ON / OFF light by a light beam indicated by R in the drawing as a reset light pulse to another display unit via an optical means (such as a lens) is provided. I have. Also, the reset light pulse R sent from the light emitting means 4 output from the other display unit is received in the substantially cylindrical concave portion 5a (light received by the light receiving element 5b by the photo transistor), and is reset for each reset light pulse R. A light receiving unit 5 for generating a reset signal is provided together with the control unit 6.

Here, the optical signal input to the light receiving element 5b in FIG. 4 is a reset optical pulse R shown in FIG.
This input light is differentiated by the capacitor C and the resistor R via the Tr, and becomes a differentiated signal as shown in FIG. 5B. The lower part of the differential wave shown by the dotted line in the figure is cut by the diode D and input to the timer control means 6 as a data load signal of the timer 6a.

Here, the reason why the reset light pulse R described above is a pulse-like ON / OFF light is that the display unit is arranged in an erroneous arrangement that is affected by sunlight due to the sunshine of the west. In the event that the light is interrupted, the type that detects interruption by continuous light cannot distinguish sunlight from light beams. Then, the light beam is pulsed ON / OF.
A method is adopted in which the rising edge (or falling edge) of the pulse is detected as the F light, and the presence or absence of the pulse light is reliably detected.

The timer 6a configured as described above is provided in FIG.
The timer data is reset (initialized) at each rising edge of the reset light pulse R indicated by the arrow (a), and the timer 6a loads the timer data indicated by 6c in FIG.

The timer control means 6, which initializes the timer value in response to the reset signal 5c, counts down the loaded data by the pulse output from the oscillator 6b as shown in FIG.

If the timing interval of the reset signal 5c, that is, the timing interval of the rising edge in FIG. 5A occurs within the time indicated by t in FIG.
The down count value of a does not become 0 or less (time UP). On the other hand, the intruder interrupts the reset light pulse R and
If the next reset signal 5c is not acquired within the down-count time of the timer data 6c indicated by td in (d), the signal is transmitted to the input port of the CPU indicated by IN2 in FIG.

The timing position indicated by Q1 in FIG. 5D is a point indicating occurrence of an intruder. The intruder blocks the reset light pulse R up to the position Q2. Since this interruption is interrupted beyond the time UP time td, the approach detection of FIG. 5E occurs within the CPU for the time ti from the time UP timing.

The CPU receives the pulse of the oscillator 6b at the IN1 port and displays the entry detection time ti and OUT1.
The reset light pulse R output from the port is created. Then, when an intruder is detected, the reset light pulse R output from the OUT1 port is inhibited during the display time ti of the intrusion detection, and the reset light pulse R is not output. To inform. That is, the display units of the next and subsequent stages, to which the reset light pulse R has been inhibited, generate the display of the entry detection sequentially and are transmitted to the last display unit.

The light emitting means 4 shown in FIG. 4 comprises a semiconductor laser beam light emitting element 4a, and is turned on / off by TR1.
ON / O in pulse form by light beam
The light is output as FF light (reset light pulse R) to another display unit via a condenser lens.

The light-emitting body 3 indicated by L in FIG. 4 is composed of a group of LEDs which are red light-emitting diodes.
When the nighttime detecting means for detecting the presence or absence of sunlight is detected by a photodiode or the like indicated by
Flashes repeatedly at regular intervals as a warning light.
Therefore, when the entry detection occurs, the CPU drives the Tr2 in the drawing at a different cycle and turns on the light-emitting body (L) 3 at a short blinking cycle different from the above.

The display period of the entry detection is shown in FIG.
(E) temporarily end at the Q3 position (ti time),
The reset light pulse R is output again. This makes it possible to resume the return operation after the entry detection display operation without any trouble.

FIG. 3 shows a state in which seven display units Pa to Pg are freely arranged around the excavator 7 in a substantially concave shape. The hatched portion in the figure is a position where the worker operating the shovel car 7 in the cabin 7a becomes a blind spot, and the arm 7b is working while rotating in the X and Y directions in the figure.

Here, first, a reset light pulse R is output from Pa to Pb, and further from Pb to Pc, and from Pc to Pb.
The display units are connected to each other by d.

In FIG. 1, among the light beams output from the light emitting means 4, a reset light pulse indicated by R in FIG. 1 is provided in the substantially cylindrical recess 5a of another output unit located at the next stage. Output to the light receiving element 5b. Here, the light emitting means 4 is provided at a position lower than the position indicated by H in the figure, and outputs a reset light pulse R from below to the light receiving element 5b provided at a position higher than H. I have. This is for preventing noise light due to sunlight, and the conical cylinder-shaped concave portion 5a is opened slightly but downward.

The light receiving element 5b and the concave portion 5a provided above the boundary line H are horizontally rotated within the range of Z shown in FIG. 2A (the angle range of about +100 degrees to -100 degrees). Although not shown in the figure, the axial direction of the light receiving element 5a of the light receiving means 5 and the axial direction of the light emitting element 4a of the light emitting means 4 are adjusted to different angles by loosely tightening a screw for fixing the light emitting body 3, though not shown in the figure. FIG.
It can be fixed at the angle d shown in FIG.

As a result, Pb, Pc, Pd, Pd in FIG.
In each display unit f, the axial directions of the light receiving means 5 and the light emitting means 4 are adjusted to different angles d1, d2, d3, and -d4 degrees, respectively.

Since the display unit Pa located at the head shown in FIG. 3 does not receive the reset light pulse R, the entry detection always works. Therefore, by providing a switch indicated by SW in FIG.
The N-side is closed, and the time-up signal of the timer 6a is closed by the AND circuit 6d. Further, as a process at the time of power ON, the reset light pulse R is forcibly output for a fixed time after the power switch indicated by 6s in FIG. 1 is turned ON, thereby facilitating the arrangement of each display unit and detecting the entry. It is devised so as not to enter the operation.

As described above, according to the above-described embodiment, when the reset light pulse R is interrupted due to, for example, a person entering between Pc and Pd in FIG. 3 and a time UP occurs, the output of the reset light pulse R is changed to Pd. , To the direction of Pe... Pg, and the time UP is generated in all display units after Pd. Therefore, the operator in the cabin 7a only needs to check the blinking period of the light-emitting body 3 of the final display unit Pg placed in the dangerous area, and the operator in the cabin 7a has entered the blind spot (shaded area in the figure). Also, it is possible to easily confirm the occurrence of the approach.

Further, an intruder can also detect an unusual change from a change in the blinking cycle, and a safety ascertainer who performs safety confirmation at the work site can easily enter the entry location Pc- of the intruder from the change position Pd (.about.Pg) of the blinking cycle. It is possible to specify between Pd.

The light receiving element 5b, which is rotatable in the horizontal direction, can be adjusted to any angle, and a plurality of display units can be arranged in any shape according to the construction site.

Further, the light receiving element 5b has a substantially cylindrical recess 5
By being provided in the hole a, even in the daytime construction, only the reset light pulse R by the light beam can be easily detected in the hole 5a even during daytime construction.

In this embodiment, the display unit is formed in a cone shape. However, the display unit is not limited to the cone shape, and the same reference numerals are given and detailed description is omitted. However, the display unit 1 is shown in FIG. It may be a pole shape as shown or a guard shape as shown in FIG. 7 (b). Further, the light emitting body 3 is an LED which is a group of red light emitting diodes, but may be a halogen lamp or the like. Further, the light receiving element 5b
Has shown the embodiment rotatable within an angle range Z of about +100 degrees to -100 degrees, but the light emitting means 4 may be rotatable, or the light emitting means 4 and the light receiving element 5b May be configured to rotate to different positions, and the angle variable range Z is from +100 degrees to -1.
The angle is not limited to 00 degrees and may be between +150 degrees and -180 degrees. Further, the light emitting means 4 may be provided with an angle adjusting means X such as a mirror or a prism as shown in FIGS. 8A and 8B so as to adjust the angle in the range of Z in the figure. . That is, the present invention is not limited to the above embodiments, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0047]

According to the present invention, a cordless entry detection display that recognizes that the area is an entry-prohibited area and prevents entry and allows the operator who operates the equipment at the construction site to recognize the presence of the entry person. An apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIGS. 2A and 2B show the principle thereof, wherein FIGS.
Shows a top view.

FIG. 3 is a top view showing the arrangement.

FIG. 4 is a block diagram showing a control system.

FIG. 5 is a timing chart showing the signal waveform.

FIG. 6 is a perspective view showing a conventional example.

7A and 7B are perspective views showing other shapes.

FIG. 8 shows other angle adjusting means, (a),
(B) shows a configuration diagram.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 display unit 2 battery battery 3 light emitter 4 light emitting means 4a light emitting element 5 light receiving means 5a recess 5b light receiving element 5c reset signal 6 timer control means 6a timer 6b oscillator 6c data R reset light pulse X angle adjusting means

Claims (3)

[Claims] 1. A plurality of display units, which include at least a battery cell and a luminous body and perform blinking lighting in a cordless manner, indicating a dangerous area at a construction site or the like, in a pulsed form by a light beam separately from the luminous body. Receiving a reset light pulse sent from the light emitting means output from the other display unit as an ON / OFF light as a reset light pulse to another display unit, and generating a reset signal for each reset light pulse Light receiving means, and a timer control means for receiving the reset signal and initializing a timer value, and when the reset signal is not obtained within a predetermined time and the timer times up, Means for inhibiting the output of the light emitting means for a certain period of time, and changing the display of the entry detection by changing the blinking cycle of the light emitting body. An entry detection display device characterized by performing the following. 2. An angle adjusting means, wherein at least one of the light-receiving element of the light-receiving means and the light-emitting element of the light-emitting means is rotatable in a horizontal direction and adjusts the axial directions of the light-receiving element and the light-emitting element to different angles. The approach detection display device according to claim 1. 3. The entry detection display device according to claim 1, wherein the light receiving element is provided in a substantially cylindrical concave hole that restricts the entry direction of the reset light pulse.