JPS62214380A - Approach annunciator - Google Patents

Abstract

PURPOSE:To improve the safety of operation by detecting a vehicle, etc., entering the operation range of an operation site by utilizing a radio pulse wave and indicating that to the operator of a construction machine. CONSTITUTION:An annunciator consists of a portable transponder 5 which is mounted on an approaching body and a radio pulse transmitter-receiver 8 mounted on an object body of approach. The portable transponder 5 is equipped with a transponder 6 and an antenna 7 for transmission and reception, and the radio wave pulse transmitter-receiver 8 is equipped with a pulse transmitter 9, a distributor 10, a circulator 11, an antenna 12 for transmission and reception, a directional coupler 13, a pulse receiver 14, and a detector 15. Then, a pulse wave corresponding to the distance of the object body in the operation range is transmitted and received to detect whether or not the approaching body enters the operation range, and the entry state is indicated to the machine operator of the object body, thereby securing the safety of the operation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applicable to people who enter the work area of a work site when working using construction machinery or the like.

The present invention relates to an approach notification device that detects a vehicle or the like using radio pulse waves and notifies the driver of a construction machine or the like.

(Prior Art) Conventionally, approach reporting devices such as radar have been used to detect approaching objects such as people or vehicles entering the working range of approaching objects such as construction machinery, and notify the approaching objects. There is a device that measures the time of a radio pulse reflected from an approaching object, such as, and detects the approaching distance.

(Problem to be solved by the invention) However, in such conventional devices.

There is a problem in that it cannot be applied in areas where the time required for non-signal propagation is short, for example within several tens of meters to a hundred and several tens of meters.

The present invention aims to eliminate the above-mentioned conventional drawbacks.

A small portable transponder is attached to approaching objects such as people and vehicles,
By installing a wireless pulse transmitter/receiver on each object to be approached, such as construction machinery, and transmitting and receiving pulse waves according to the distance of the work area of the object to be approached, it is possible to check whether the approaching object has entered the work area. The object of the present invention is to provide an approach notification 'Afft' that can detect the approaching object and notify the machine operator of the approaching object to ensure work safety.

(Means for solving the problems) Means for achieving the above object will be explained using FIGS. 1 to 3 corresponding to the embodiments.

The present invention provides a device for detecting an approaching object 3 such as a person or vehicle entering the work area 2 of an approaching object 10 such as a construction machine, and reporting the approach of the approaching object 3 to the approaching object 1. 3 and a wireless pulse transmitter/receiver 8 installed on the object 1 to be approached.

The portable transponder 5 includes a transponder 6 and a transmitting/receiving antenna 7, and the wireless pulse transmitter/receiver 8 includes a pulse transmitter 92, a distributor 10. Circulator 11. Transmission/reception antenna 12. A directional coupling 513, a pulse receiver 14 and a detector 5 are provided.

(Function) The wireless pulse transmitter/receiver 8 sends the transmitted pulses P to the pulse transmitter 9 to the distributor 10. It radiates from the transmitting and receiving antenna 12 via the circulator 11, and on the other hand.

Distributor 10. Pulse receiver 1 via directional coupler 13
Let me input it to 4.

The transmission pulse P radiated from the transmitting/receiving antenna 12 is
The signal is received by the transmitting/receiving antenna 7 of the portable transponder 5 and input to the transponder 6. transponder 6
After a predetermined delay time, the transmission pulse P is radiated as a response pulse Q from the transmitting/receiving antenna 7.

This response pulse Q is transmitted to the transmitting/receiving antenna 12 of the wireless pulse transmitter/receiver 8. Circulator 11. Directional coupler 13
The pulse signal is input to the pulse receiver 14 via the pulse receiver 14.

Therefore, the response pulse Q is input to the pulse receiver 14 following the previously input transmission pulse P.

The transmission pulse P is the time 2 which is twice the time T to propagate over a distance of radius 4 in the working range 2, 2T plus the delay time.
It is assumed that the pulse has a time width of T+L (FIG. 3A).

As a result, the portable transponder 5a of the approaching object 3 that has entered the solid circle of the working range 2 receives the transmission pulse P after a time T and emits it as a response pulse Q after a delay time, but the response pulse Q Since an additional time T is required to input the pulse to the pulse receiver 14, the waveforms of the received pulses of the transmission pulse P and the response pulse Q in the pulse receiver 14 are continuous (FIG. 3B).

The portable transponder 5b of the approaching object 3 that has entered the solid circle of the working range 2 receives the transmitted pulse P in a time T shorter than the time T, and also receives the pulse receiver 14 of the response pulse Q.
Since the input to the pulse receiver 14 also requires a time T shorter than the time T, the waveform of the received pulse in the pulse receiver 14 (Fig. 3C)
) is a waveform in which the transmission pulse P and the response pulse Q are partially overlapped with each other.

In the portable transponder 5C of the approaching object 3 outside the solid line circle of the working range 2, the transmission pulse P is transmitted for a time T longer than the time T,
Therefore, since the input of the response pulse Q to the pulse receiver 14 also requires a time T1 longer than the time T, the waveform of the received pulse in the pulse reception r 14 is the same as that of the transmitted pulse P and the response pulse Q. The break time Y between
The waveform (FIG. 3D) is as follows.

Therefore, by measuring the waveform of the received pulse from the pulse receiver 14 with the detector 15, the approaching object 3 can be detected at the working node 1.
．． It is possible to detect whether the vehicle has entered the work area 12 or not, and to immediately issue an alarm if it is detected that the vehicle has entered the work range 2.

(Example) The present invention will be explained below with reference to the drawings shown in FIGS. 1 to 3.

FIG. 1 is an explanatory diagram of the overall configuration, in which a wireless pulse transmitter/receiver 8 is installed on an object 1 such as a construction machine area, and this object 1
The zero working range 2 is shown by a solid circle with a radius of 4.

A portable transponder 5a r 5'b + that receives a transmission pulse P from a wireless pulse transceiver 8 and transmits the transmission pulse P as a response pulse Q after a predetermined delay time.
5G is being carried by close objects such as people and cars.

These portable transponders 5a + 5b + 5
An approach notification device is composed of c and a radio pulse transmitter/receiver 8.
In response to a response pulse Q from the portable transponder 5c located outside the work area 2, the wireless pulse transmitter/receiver 8 does not notify the machine operator of the object 1 to be approached, but if the object is located on or inside the solid circle of the work area 2. A portable transponder 53
A response pulse Q from +5b is designed to notify an alarm.

FIG. 2(B) is a block diagram showing one embodiment of a wireless pulse transmitter/receiver 8 and a portable transponder 5, respectively.

Figure 2 (In Al, 9 is a pulse transmitter, 10 is a distributor, 11 is a circulator, 12 is a transmitting and receiving antenna,
13 is a directional coupler, and 14 is a pulse receiver.

15 is a detector.

Also, in Fig. 2 (Bl), 6 is a transponder.

7 is a transmitting/receiving antenna.

Next, the operation will be explained.

The transmission pulse P output from the pulse transmitter 9 of the line pulse transceiver 8 is sent to a two-way divider 10.p. It is radiated from a transmitting/receiving antenna 12 via a circulator 11, and a distributor 10. The signal is input to a pulse receiver 14 via a directional coupler 13 .

On the other hand, the transmission pulse P radiated from the transmitting/receiving antenna 11 is received by the transmitting/receiving antenna 7 of the portable transponder 5 and input to the transponder 6. The transponder 6 receives the transmitted pulse P after a predetermined delay 4z time.
is radiated from the transmitting/receiving antenna 7 as a response pulse Q.

The response pulse Q radiated from the transmitting/receiving antenna 7 is received by the transmitting/receiving antenna 12 of the wireless pulse transmitter/receiver 8, and then sent to the circulator 11. The signal is input to a pulse receiver 14 via a directional coupler 13 .

The pulse receiver 14 receives the response pulse Q following the previously inputted transmission pulse P.

In this case, the time 2T (the propagation time of the transmitted pulse P for the round trip distance between the approached object 1 and the working range 2 ) plus the delay time (time width 2T+L) ($3 Figure A).

As a result, when the approaching object 3 enters the solid line circle of the working range 2, the portable transponder 5a.

A transmission pulse P emitted from a radio pulse transmitter/receiver 8 installed on the object to be approached 1 is received after a time T, and is emitted as a response pulse Q after a delay time.

This response pulse Q is input to the pulse receiver 14 of the wireless pulse transmitter/receiver 8 after a time T, so the reception pulse of the previously input transmission pulse P and response pulse Q at the pulse receiver 14 is The waveform is a continuous waveform (Fig. 3B
).

Also, if the approaching object 3 enters the solid line circle of the working range 2,
The portable transponder 5b receives the transmission pulse P after a time lpo which is shorter than the time T.

Thereafter, the response pulse Q is emitted by the same operation as the portable transponder 5a.

Since the response pulse Q requires time +po to be input to the pulse receiver 14 of the wireless pulse transceiver 8.

Transmission pulse P and response pulse Q in pulse receiver 14
The waveforms of the received pulses are partially overlapping waveforms (Fig. 3C).
).

Furthermore, if the approaching object 3 is outside the working range 2 at j1111.

The portable transponder 5° has a transmission pulse Pi time 'r
received after a longer time T1, and the response pulse Q is sent to the pulse receiver 14 of the wireless pulse transceiver 8 after a time T1.
It takes ゛1 to enter.

Therefore, the received pulse R of the transmission pulse P and response pulse Q input to the pulse receiver 14 is
The waveform (FIG. 3D) has a break time Y between the two.

Therefore, the waveforms of these received pulses are measured by the detector 15, and if the break time Y is zero (and the wavelength is longer than the transmitted pulse P (Fig. 3 B, C), the approaching object 3 is within the working range 2. Because it's going inside.

Work safety can be ensured by notifying the machine operator of the approaching object 1 of the approach of the approaching object 3 using an alarm or the like.

In addition, the received pulse Rg having the break time Y (Fig. 3D
) If detected, the approaching object 3 is outside the working range 2, so no alarm etc. will be generated.

(Effects of the Invention) As explained above, according to the present invention, it is possible to easily detect people, vehicles, etc. that have entered the working range of construction machinery using a wireless pulse transmitter/receiver with a simple configuration and a portable transponder. Since it can be done reliably, it has the effect of economically improving work safety.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of the approach communication @ device according to the present invention, FIGS. 2 A and B are configuration diagrams showing an embodiment of the same radio pulse transmitter/receiver and portable transponder, and third factors A and B
, C, and D are waveform diagrams showing the relationship between the same transmission pulse and response pulse. 1... Approaching object, 2... Working range, 3... Approaching object. 4... Working range 20 radius, 5.5a to 5C... Portable transponder, 6... Transponder, 7.12
...Antenna for transmitting and receiving, 8...Radio pulse transmitter/receiver. 9...Pulse transmitter, 10...Distributor, 11...
Circulator, 13... Directional coupler, 14...
・Pulse receiver. 15...Detector Atsushi 1 diagram

Claims (1)

[Claims] Detects an approaching object (3) such as a person or vehicle entering the working range (2) of an object to be approached (1) such as a construction machine, and notifies the object to be approached (1). In the approach notification device, the approach notification device includes a portable transponder (5) carried by the approaching object (3) and a wireless pulse transmitter/receiver (8) installed in the approached object (1), The portable transponder (5) has a transponder (6) and a transmitting/receiving antenna (
7), and the wireless pulse transmitter/receiver (8) includes a pulse transmitter (9), a distributor (10), and a circulator (11).
), transmitting/receiving antenna (12), directional coupler (13)
, a pulse receiver (14) and a detector (15), and a transmission pulse (P) output from the pulse transmitter (9).
) is the radius (4) of the working range (2) of the object to be approached (1)
), and the wireless pulse transmitter/receiver (8) uses Transmission pulse (P
) is radiated from the transmitting/receiving antenna (12) via the distributor (10) and circulator (11), and the pulse receiver (14) is radiated via the distributor (10) and directional coupler (13). The portable transponder (6) receives the transmission pulse (P) radiated from the transmission and reception antenna (12) via the transmission and reception antenna (7)
5) is the transmission pulse (P) after the delay time (L).
as the response pulse (Q) and the above shared transmitting/receiving antenna (7)
The response pulse (Q) is transmitted to the transmitting and receiving antenna (12).
The radio pulse transmitter/receiver (8) transmits the response pulse (Q) to the pulse receiver (14) via the circulator (11) and directional coupler (13).
A reception pulse (R) consisting of the transmission pulse (P) and response pulse (Q) output from the pulse receiver (14)
is continuous in time series and has a pulse width longer than the pulse width of the transmission pulse (P), or there is a break time (Y) between the transmission pulse (P) and the response pulse (Q).
The detector (15) detects whether the received pulse (R) has the break time (Y), and the detector (15) generates an alarm only when the received pulse (R) does not have the break time (Y). An approach notification device characterized by: