JPS62242029A - Detector for object in close contact with construction equipment - Google Patents

Abstract

PURPOSE:To enable a close contact with and a kind of a detected object, to be detected and noticed, by arranging the receiver of signal from the detected object, a discriminator for discriminating whether the object is within a specified distance or not and what the kind is, and an alarm device working on the signal from the object. CONSTITUTION:At the code setting section 13 of car bodies, the discriminating and identifying numbers of the car bodies are coded, and output is directed to a coded information generating section 14, and signal corresponding with the output is produced, and the output is directed to an oscillating section 15 having the frequency of f1-fn. After that, by a transmission section 16, the output is converted to the high-frequency wave of f0, and it is radiated from an antenna 12, and by the antenna 10 of a pressure- oil shovel near the antenna 12, input to a receiving section 17 is provided, and the input of the plural kinds of frequency of f1-fn to a decoding section 20 from a discriminating section 19 is provided. By a discriminating section 22, whether signal is outputted on control signal from an indication control section 21 to an alarm section 24 is discriminated. As a result, in case that codes are normally decoded, a close contact with the car bodies can be noticed to operators.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nearby object detection device for construction machinery.

(Prior Art) In construction machines such as hydraulic excavators, the operator always visually monitors the surrounding conditions to ensure safe operation, but if the vehicle or surrounding workers enter a blind spot, the operator may become unable. Also, visually monitoring the surrounding situation is not only physically taxing, but also mentally tiring.

A vehicle or worker approaching a hydraulic excavator carries a transmitting device, while a receiving device is installed in the driver's seat of the hydraulic excavator, and the transmitting device sends a signal to the receiving device, and the vehicle or worker approaches the hydraulic excavator. The hydraulic excavator operator is made aware of this.

(Problem to be solved by the invention) As described above, by sending a signal from the transmitting device to the receiving device,
It is troublesome for the hydraulic excavator operator to notify the hydraulic excavator operator that a vehicle or worker is approaching the hydraulic excavator.

Furthermore, if an ultrasonic monitoring device or an infrared monitoring device is installed in the driver's seat, it is possible to detect approaching vehicles or workers without sending or receiving signals, but ultrasonic monitoring devices can only detect objects a few meters away. No. 1 Infrared monitoring equipment has a drastic change in sensitivity between night and day. Moreover, these monitoring devices have a problem in that it is difficult to determine the type of object to be detected.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and includes a receiving device that receives a signal from a detection target approaching a construction machine, and a receiving device that receives a signal from a detection target that approaches a construction machine. A discrimination device that determines whether a detection target has approached within a specific distance and the type of the detection target, and an alarm that is activated by a signal from the discrimination device when the detection target has approached within a specific distance. The purpose of the device is to detect whether the object to be detected has approached within a specific distance, whether at night or during the day. Another object of the present invention is to provide an improved proximity object detection device for construction machinery that can notify an operator of the construction machine of the type of object to be detected.

(Function) The apparatus for detecting a nearby object for a construction machine according to the present invention is configured as described above, and includes a receiver installed in the driver's seat to receive a signal from a detection object approaching the construction machine (different signal for each detection object). The device receives the signal and outputs it to the 9 discrimination device, which determines whether the detected object has approached within a certain distance based on the signal from the receiving device, and determines the type of the detected object. When the object to be detected approaches within a certain distance, the alarm device is activated by a signal from the determination device, and the operator is notified of this fact.

(Example) Next, the proximity object detection device for construction machinery of the present invention will be described in Section 1.2.
．． An example shown in FIG. 3 will be explained.

First, the outline of a hydraulic excavator will be explained with reference to Fig. 3.
1) is the lower traveling body, (2) is the upper rotating body, (3) is the driver's seat provided on the upper rotating body (2), (4) is the boo lx,
(5) is the arm, (6) is the bucket, (7) is the boom cylinder, (8) is the arm cylinder 1 (9) is the packet cylinder, and (10) is installed on the upper revolving structure (2). The antenna of the receiving device, (11) is the vehicle approaching the hydraulic excavator, and n2i is the antenna of the transmitting device installed on the vehicle (11). Next, the receiving device installed in the hydraulic excavator will be explained with reference to FIG. 1. (17) is a receiving section having the antenna (10), (18) is a sensitivity setting section, (19) is a determining section, (20) is the code deciphering part, (
21) is the display control section, (22) is the type discrimination section, (2
3) is a display section, and (24) is an alarm section. Next, the transmitting device provided in the vehicle (11) will be explained with reference to FIG. 2. (13) is a code setting section, (14) is a coded information generation section, (15) is an oscillation section, and (16) is the code setting section. It is a transmitter having an antenna (12).

Next, the operation of the proximity object detection device for construction machinery shown in FIG. 1.2.3 will be specifically explained. The code setting section (13) of the transmitter of the vehicle (11) uses a several-digit number,
By setting the vehicle (or worker) identification number using a digital switch, etc.

It is encoded and output to the encoded information generating section (14). The coded information generating section (14) also generates amplitude.

By changing the frequency etc., a signal corresponding to the coded information is created and output to the three oscillation units (15). In addition, the oscillator (15) uses an f
, to rl. Second
The figure shows a state in which a signal with a frequency of r is input from the oscillating section (15) to the transmitting section (16). In addition, the transmitter (16) transmits the above [.

A signal with a frequency of is converted into a high frequency radio wave with a frequency of fo and is radiated from an antenna (12). This radio wave.

The transmitter (16) attenuates the radio waves in advance, or the antenna (12) weakens them so that they become extremely weak radio waves of several microvolts at a distance of several meters. Also, the antenna (II) of the vehicle (11)
) is received by an antenna (10) of a nearby hydraulic excavator, and is manually transmitted to a receiving unit (17). The sensitivity setting section (18) sets the sensitivity of the transmitted radio waves to correspond to the detection distance. The received radio wave is f
, to f7, a determination unit (
19) and after an 8 judgment, it is manually input to the code decoding section (20). The judgment section (19) and the code decoding section (20)
) are provided with n pieces corresponding to the type of received radio waves,
This is to prevent malfunctions due to interference. Further, the code signal decoded by the code decoding section (20) is input to the display control section (display control section having a function of confirming whether or not decoding has been performed normally) (21). Further, the determining section (22) determines whether or not there is a code signal from the code decoding section (20). Further, the discrimination section (22) is connected to the display control section (21).
It is determined whether or not to output an alarm signal to the alarm section (24) based on the control signal from the alarm section (24). If the code is successfully decoded, an alarm signal is output to the alarm unit (24), and the alarm unit (24)
4) to notify the driver that the vehicle (11) is approaching. Further, a control signal from the display control section (21) is sent to the display section (23) and displayed on a cathode ray tube, numeric display, etc.

(Effects of the Invention) As described above, in the proximity object detection device for construction machinery of the present invention, a receiving device installed in the driver's seat receives a signal from a detection object approaching the construction machine (different signals for each detection object). then 1
Based on the signal from the receiving device, it determines whether the detected object has approached within a specific distance and the type of the detected object. 1. Since the alarm device is activated by the signal from the same judgment device when approaching the inside. This has the effect of informing the operator of the construction machine whether the object to be detected has approached within a specific distance and the type of the object to be detected, regardless of whether it is night or day.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to these embodiments, and can be modified in various ways without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing an embodiment of a nearby object detection device for construction machinery according to the present invention, FIG. 2 is a system diagram showing a nearby object transmitting device, and FIG. 3 is an example of a construction machine. FIG. (1) to (9)...Construction machine, (11)...Detection target, (10)(17)...Receiving device, (18
) to (21)... Discrimination device, (24)... Alarm device.

Claims (1)

[Claims] A receiving device receives a signal from a detected object approaching a construction machine, and determines whether the detected object has approached within a specific distance and the type of the detected object based on the signal from the receiving device. A nearby object detection device for construction machinery, comprising a discrimination device and an alarm device that is activated by a signal from the discrimination device when the detection object approaches within a specific distance.