KR20170047703A

KR20170047703A - Safety Management System using UWB

Info

Publication number: KR20170047703A
Application number: KR1020150148116A
Authority: KR
Inventors: 장용준
Original assignee: 주식회사 경우시스테크
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2017-05-08
Also published as: KR101745709B1

Abstract

The present invention relates to a workplace safety management system using ultra wideband (UWB). The workplace safety management system using UWB comprises: one or more vehicle tags (VT) (110) which are attached to each work vehicle (v), receive a unique ID code, have one or two UWB communication modules and include a speed measuring means for measuring the speed; and one or more pedestrian tags (PT) (120) which are held by each pedestrian, receive a unique ID code and include a UWB communication module. Each of the VTs (110) and each of the PTs (120) measure a distance between each other through UWB communication, and when located within a predetermined radius, the corresponding VT (110) and the corresponding PT (120) determine that the situation corresponds to an approach alarm and then sound the alarm. The present invention is to provide a workplace safety management system using UWB capable of efficiently performing worker monitoring which is hardly influenced by the external environment or the like by utilizing permeability and reflectivity of an UWB module using an UWB impulse signal.

Description

{Safety Management System using UWB}

The present invention relates to a workplace safety management system using UWB, which is attached to each work vehicle (v), is given a unique ID code, has one or two UWB communication modules, (PT) having a UWB communication module and having a unique ID code and being held by each worker (P), wherein the at least one work tag (PT) (Pedestrian Tag) 120,

Each of the vehicle tags 110 and the worker tags 120 measures the distance between them through UWB communication and when the vehicle tags 110 and the worker tags 120 are located within a predetermined radius, ) Is an access alarm, and issues an alarm. The present invention relates to a workplace safety management system (100) using UWB.

Generally, it is easy to observe the front in a cabin of a work vehicle including a heavy construction equipment such as an excavator, but it is difficult to observe the rear because of the equipment mounted on the body. Accidents such as human accidents or structural damage that occur during operation of a heavy equipment are mostly caused by points that are difficult for the driver to observe. In order to prevent this, a camera is attached to the rear of the heavy equipment main body, and an image photographed by the camera is displayed in the cab to allow the driver to check the human body or object behind.

On the other hand, most heavy equipment is equipped with a revolving structure at the top, and even a dump truck with no upper revolving structure has at least one joint site. Heavy equipment related accidents usually occur during joint site operation. However, when only the rear monitoring camera is installed as in the conventional case, it is not easy to monitor the surrounding conditions during operation of the heavy equipment. There is still a blind spot around the body of the heavy equipment. In other words, development of a more efficient monitoring device is required to prevent safety accidents during heavy equipment operation.

In addition, in the case of a forklift, when the load is loaded, the field of view of the electric field is extremely restricted by the load, so that it is difficult to work and it is extremely difficult to detect a dangerous situation in a limited field of view.

In order to solve the problem of the conventional work vehicle, the proposed approach for approach alarm between the work vehicle and the worker has been mainly implemented by RFID or RF.

The RFID method is divided into passive tag method and active tag method. Passive tag method generally has a recognition distance of 3m or less. Active tag has a recognition distance of 10m or more according to the method, And there is a problem that only the presence or absence of the tag can be determined within the recognition radius.

On the other hand, the RF method indirectly estimates the distance through the RSSI of the RF signal received by the beacon or data communication, and generates an access alarm based on the distance.

However, in conventional devices such as an access alarm system based on RFID or RF signal strength, the approach recognition method is merely an indirect distance measurement method based on the matching of the reception intensity and the distance. Therefore, There is a problem that it is difficult to generate an alarm at a certain distance because the intensity of the signal changes.

In order to solve such a problem, a conventional PIR system (hereinafter referred to as " PIR system ") which is detachably mounted on a heavy equipment body in a "heavy equipment access monitoring system for construction (Korean Registration No. 10-1322201) A plurality of sensor units including a pyroelectric infrared ray (IR) sensor and an ultrasonic sensor for detecting an approach distance of an object using ultrasonic waves conveyed from an object; A main control unit for processing a signal output from the sensor unit to determine whether a human body or an object is approaching and calculating an approach distance to perform corresponding control; An alarm speaker for outputting an alarm sound to the outside of the vehicle body when the human body approaches by the control of the main control unit; And a display device installed in a cab of a heavy equipment and displaying the access status of a human body or an object detected by the main control unit on the screen.

However, this conventional invention has a problem in that it is difficult to accurately detect the presence or absence of an operator because the accuracy of monitoring is lowered at a construction site that is affected by external factors such as weather, there was.

In particular, there is a problem that it is extremely difficult to detect the operator through image reading or infrared / ultrasonic sensing when considering the activity characteristics of the worker at the construction site, which is often carried with or carrying various construction equipment or tools or carrying work materials .

Korean Patent No. 10-1322201

Disclosure of Invention Technical Problem [13] The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a UWB module capable of efficiently monitoring an operator, And a workplace safety management system.

In order to achieve the above object, a workplace safety management system using UWB according to an embodiment of the present invention is characterized in that a workplace safety management system using UWB is attached to each work vehicle (v) (UWB) communication module (UWB communication module) 110. The UWB communication module 100 includes at least one vehicle tag (VT) 110 having a plurality of UWB communication modules And one or more operator tags (PT) 120,

Each of the vehicle tags 110 and the worker tags 120 measures the distance between them through UWB communication and when the vehicle tags 110 and the worker tags 120 are located within a predetermined radius, ) Is determined to correspond to an access alarm and issues an alarm.

In addition, one or more zone tags (ZT) 130 installed in a predetermined area and having a unique ID code and having one or two UWB communication modules spaced apart from each other, (Monitoring Server) 150 connected to the ZT (Zone Tag) 130 through a communication network 140 and having one or more management terminals 160; Wherein the zone tag 130 determines the traveling direction of the vehicle tag 110 or the worker tag 120 through the UWB communication module, Or exit, and transmits the entry / exit information to the management server 150 according to the determination result.

The entry / exit information may include at least one of the speed information measured by the vehicle tag 110 and the position information measured through the area tag 130, and 1) running time 2) 3) fuel amount, and an ID code unique to the vehicle tag 110,

The management server (150)

When the speed information included in the entry / exit information exceeds a predetermined speed limit or when the position information included in the entry / exit information is determined to belong to a predetermined restricted area, or when the driving time, And controls to issue an alarm to the vehicle tag (110) having the corresponding ID code when it is determined that any one of them is out of the predetermined limit range.

Meanwhile, the zone tag 130 determines the direction of the worker tag 120 through the UWB communication module, determines whether or not the worker enters or leaves the work zone, and inputs / Tag 120 to the management server 150. The management server 150 determines and manages the number of workers in a predetermined work area according to the entry / do.

The distance measurement between the vehicle tag 110, the worker tag 120 and the area tag 130 may be performed using a Symmetric Double Sided-Two Ranging (SDS-) method using the transmission / reception time ToA of the UWB module. TWR).

According to the present invention, by using the transmissivity and the reflectivity of an UWB module using an UWB impulse signal, the UWB module has almost no directivity along the direction without being influenced by the external environment, It is possible to provide a workplace safety management system using UWB capable of efficiently monitoring workers.

FIG. 1 is a schematic diagram of an overall configuration of a workplace safety management system using UWB according to an embodiment of the present invention; FIG.
2 is a schematic diagram showing the configuration of a vehicle tag of a workplace safety management system using UWB according to an embodiment of the present invention;
3 is a schematic diagram showing a configuration of a worker tag of a workplace safety management system using UWB according to an embodiment of the present invention.
4 is a schematic diagram showing the configuration of a zone tag of a workplace safety management system using UWB according to an embodiment of the present invention;
5 is a diagram showing a sensitivity variation according to a direction of an RF-based monitoring apparatus according to an embodiment of the present invention;
FIG. 6 is a diagram showing a sensitivity deviation according to a direction of a UWB communication module of a workplace safety management system using UWB according to an embodiment of the present invention.
Figure 7: Drawings illustrating the characteristics of various proximity sensing devices and UWB communication modules.

Hereinafter, a workplace safety management system using UWB according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts are denoted by the same reference numerals whenever possible. In describing the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

1, the heavy equipment safety alarm system having the active RFID tag of the present invention includes a vehicle tag (VT) 110, a pedestrian tag (PT) 120, a zone tag A zone tag (ZT) 130 and a monitoring server (MS) 150.

First, a vehicle tag (VT) 110 will be described. As shown in FIG. 1, the vehicle tag (VT) 110 is attached to each work vehicle v and is given a unique ID code. As shown in FIG. 2, a UWB communication module (typically UWB A communication / sensor unit and an antenna (preferably a dipole antenna in this case)). 2, the vehicle tag 110 preferably includes a warning display unit including a power unit using a vehicle battery, a central control unit, a memory, a beacon light or a light beacon buzzer. In this case, the vehicle tag 110 may be installed in the front-rear direction of the vehicle so that the two UWB communication modules are installed not only in the distance from the vehicle tag 110 or the operator tag 120 in the vicinity, It is preferable to be able to calculate the moving direction. It is preferable that the vehicle tag 110 includes a speed measuring means capable of measuring the moving speed of the vehicle V such as an acceleration sensor.

Next, the worker tag (PT) 120 will be described. As shown in FIG. 1, the worker tags (PT) 120 are carried by each worker P and are given unique ID codes. As shown in FIG. 3, a UWB communication module (typically UWB A communication / sensor unit and an antenna (in this case, preferably a patch antenna). 3, the operator tag 120 may include a warning display unit including a power unit including a battery and a charger, a central control unit, a memory, a speaker, and the like.

Next, a zone tag (ZT) 130 will be described. The Zone Tag (ZT) 130 is installed in a predetermined area as shown in FIG. 1, and has a unique ID code, and has one or two UWB communication modules. In this case, the area tag 130 may include two UWB communication modules (typically, a UWB communication / sensor part and an antenna (preferably a dipole antenna in this case) as shown in FIG. 4) And it is preferable to measure the distance to the vehicle tag 110 or the operator's tag 120 as well as the moving direction by triangulation. In another embodiment, the zone tag 130 may be capable of measuring the distance to the vehicle tag 110 or the operator tag 120, as well as the direction of travel, via one UWB communication module or a separate sensor desirable. As shown in FIG. 4, the zone tag 130 may include a power supply unit including a constant power source, a central control unit, a memory, and a wired communication unit.

Next, the management server (MS: Monitoring Server) 150 will be described. 1, the management server (MS) 150 is connected to each zone tag 130 through a communication network 140 and includes at least one management terminal 160 And has the function of controlling and managing the entire system.

In this case, in order to implement the function alarm between the working vehicle and the worker or the function alarm between the working vehicle and the working vehicle, each of the vehicle tag 110 and the worker tag 120 measures the distance between them via UWB communication And if the vehicle tag 110 and the operator tag 120 are positioned within a predetermined radius, the corresponding vehicle tag 110 and the operator tag 120 are operated to judge that the vehicle corresponds to an approaching alarm and issue an alarm.

In this case, it is preferable that the approach alarm operation is operated only when it is determined that the speed of the vehicle V measured by the speed measuring means is moving at a predetermined limit speed or more.

Meanwhile, it is preferable that the approach alarm between the working vehicle and the working vehicle during the approaching alarm operation is operated only when at least one of the vehicles V is moving.

As described above, when the vehicle tag 110 is configured to measure the moving direction in addition to the relative distance, the vehicle tag 110 or the vehicle tag 110, which is located in the moving direction when a vehicle V moves, It is preferable to selectively generate an alarm only for the worker tag 120.

Also, in order to manage work area entry information of the working vehicle, the zone tag 130 determines the traveling direction of the vehicle tag 110 or the worker tag 120 measured through the UWB communication module, Determines whether or not the user enters or exits the predetermined work area, and transmits the entry / exit information to the management server 150 for management.

In this case, the entry / exit information includes speed information that is recognized through 1) change in the traveling direction of the vehicle tag 110, 2) position information, and 1) running time 2) (3) fuel amount, and an ID code unique to the vehicle tag (110)

The management server (150)

When the speed information included in the entry / exit information exceeds a predetermined speed limit or when the position information included in the entry / exit information is determined to belong to a predetermined restricted area, or when the driving time, It is preferable to control the vehicle tag 110 to issue an alarm to the vehicle tag 110 having the corresponding ID code when it is determined that any one of them is out of the predetermined limit range. In this case, it is preferable that the predetermined speed limit is set for each zone via the management server 150 and then transmitted to each of the zone tags 130.

Meanwhile, in order to control the worker information in the work area, the area tag 130 determines the direction of the worker tag 120 through the UWB communication module, determines whether the worker enters or leaves the work area The management server 150 transmits the entry / exit information to the management server 150 along with the unique ID code of the corresponding worker tag 120. The management server 150 transmits the entry / It is desirable to determine and manage the number. In other words, when the work is terminated in a dangerous work space, it is possible to immediately grasp the residual worker that may be caused by unconsciousness, which can greatly contribute to the worker's life structure and the safety in the field.

In this case, as an example of determining the method of proceeding with the worker tag 120, the distance between each of the worker tags 120 measured through the two spaced UWB communication modules may be used to calculate a distance It is possible to determine the traveling direction of the worker's tag 120 through the worker's hand. Meanwhile, as another embodiment, it is also possible to use one UWB communication module or another sensor module.

The distance measurement between the vehicle tag 110, the worker tag 120, and the area tag 130 may be performed using Symmetric Double Sided-Two Ranging (UAW) using the transmission / reception time ToA of the UWB module SDS-TWR).

In the foregoing, optimal embodiments have been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Workplace safety management system using UWB
110: vehicle tag
120: worker tag
130: Zone tag
140: Network
150: management server
160: management terminal
170: management portable terminal

Claims

One or more vehicle tags (VT) attached to each work vehicle (v), given unique ID codes, having one or two UWB communication modules, and having speed measuring means for measuring speed, (110);
One or more worker tags (PTs) 120 having UWB communication modules, each having a worker P and having a unique ID code;
Each of the vehicle tags 110 and the worker tags 120 measures the distance between them through UWB communication and when the vehicle tags 110 and the worker tags 120 are located within a predetermined radius, ) Is an access alarm, and issues an alarm. A system (100) for safety management of a workplace using UWB.

The method according to claim 1,
One or more zone tags (ZT) 130 installed in a predetermined area and having one or two UWB communication modules which are given unique ID codes and are spaced apart;
A monitoring server 150 connected to each zone tag 130 through a communication network 140 and having one or more management terminals 160; And a control unit,
The zone tag 130 determines the direction of movement of the vehicle tag 110 or the worker tag 120 through the UWB communication module to determine whether or not the worker enters or departs from the work zone, And transmits the departure information to the management server (150).

The method according to claim 2,
The entry / exit information includes speed information measured by the vehicle tag 110 and position information measured through the zone tag 130 and 1) running time transmitted from the vehicle tag 110. 2) And an ID code unique to the vehicle tag 110,
The management server (150)
When the speed information included in the entry / exit information exceeds a predetermined speed limit or when the position information included in the entry / exit information is determined to belong to a predetermined restricted area, or when the driving time, And controls to issue an alarm to the vehicle tag (110) having the corresponding ID code when it is determined that any one of the vehicle IDs is out of the predetermined limit range.

The method according to claim 1,
A monitoring server 150 connected to each zone tag 130 through a communication network 140 and having one or more management terminals 160; And further comprising:
The zone tag 130 determines the progress direction of the worker tag 120 through the UWB communication module, determines whether or not the worker enters or exits the work zone, and inputs / 120 to the management server 150,
The management server (150) determines and manages the number of workers in a predetermined work area according to the entry / exit information, and manages the work site safety management system (100) using the UWB.

The method according to any one of claims 1 to 4,
The distance measurement between each of the vehicle tags 110, the worker tags 120 and the zone tags 130 is performed by using Symmetric Double Sided-Two Ranging (SDS-TWR) using the transmission / reception time ToA of the UWB module, (100) using the UWB.