JP2007272487A - Relative position recognition system in work area - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relative position recognition system in a work area, where a relative position between a worker and a work vehicle is visually recognized. <P>SOLUTION: This relative position recognition system has: a mobile terminal 1 portably carried by the worker M, having a GPS receiver to output position data thereof; a vehicle side position detection device 2 provided in a forklift truck C, having a GPS receiver to output position data thereof; a relative distance calculation part inputting the position data from the mobile terminal 1 and the position data from the vehicle side position detection device 2 to calculate a relative distance between the worker and the work vehicle; and a data processor 3 inputting the relative distance obtained by the calculation part, and outputting alarm data when the worker and the forklift truck are closed to each other. The mobile terminal and the vehicle side position detection device are each provided with an alarm signal output part outputting an alarm signal on the basis of the alarm data, and the vehicle side position detection device is provided with a position display device displaying a position of the approaching worker. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a relative position recognition system in a work area.

  For example, when loading and unloading work with a forklift, etc., it is normal for other workers to do different work within the work area. There was a risk of occurrence.

  As a system for preventing the occurrence of such an accident, an approach detection system has been developed to notify an operator when a work vehicle such as a forklift approaches (see, for example, Patent Document 1).

In this approach detection system, a work vehicle such as an excavator is provided with a master unit in a wireless communication device, and an operator is provided with the slave unit, and one of them is too close to the other. Further, alarms are output from each other.
JP 07-168986 A

  However, according to the above approach detection system, it is possible to know that they are approaching each other by an alarm signal, but since it is not known in which direction the worker is located as seen from the work vehicle, quick and accurate accident avoidance is possible. There were cases where operations could not be performed. In particular, when an operator is hidden in the shadow of an object, there is also a problem that there is a high possibility that discovery will be delayed and lead to an accident.

  Accordingly, an object of the present invention is to provide a relative position recognition system in a work area where the relative position between an operator and a work vehicle can be known by visual observation.

In order to solve the above problems, the relative position recognition system in the work area of the present invention is a system that can recognize the relative position of the worker and the work vehicle in the work area,
A portable terminal carried by an operator and having a GPS receiver and having an output function of worker position data measured by the GPS receiver;
A vehicle-side position detection device that is provided in the work vehicle and has a GPS receiver and has an output function of vehicle position data measured by the GPS receiver;
A relative distance calculation unit that inputs the worker position data from the portable terminal and the vehicle position data from the vehicle side position detection device and calculates the relative distance between the worker and the work vehicle, and the relative distance calculation unit A data processing device capable of outputting alarm data when the operator and the work vehicle are approaching by inputting the obtained relative distance and outputting the position data of the worker related to the alarm; ,
Further, the position data of the vehicle measured by the GPS receiver is input to the vehicle-side position detection device, and the position data of the worker related to the alarm is input, so that the work vehicle and the worker in the work area are input. It is equipped with a position indicator that displays the position,
In the relative position recognition system, a plurality of stages of alarm signals are output according to the relative distance.

  According to the relative position recognition system, the operator and the driver of the work vehicle can surely know that both are approaching each other by the alarm signal, and the work vehicle side The position of the operator and the position of the worker are displayed on the display screen of the position indicator, so that the driver of the work vehicle can visually grasp the position of the worker in real time and, therefore, coupled with the alarm signal. A contact accident with an operator can be avoided reliably.

[Embodiment]
Hereinafter, the relative position recognition system in the work area of the present invention will be described.
In the present embodiment, for example, a system for recognizing a relative position between a forklift and an operator in a work area when loading and unloading work with a forklift will be described.

  This position recognition system uses GPS (Global Positioning System), and is roughly divided as shown in FIG. A portable terminal 1 having an output function, a vehicle-side position detection device 2 provided on the forklift C and having a function for outputting position data of the forklift, an operator's position data from the portable terminal 1 and a vehicle-side position detection device 2 is provided with a data processing device (so-called server) 3 that can input the position data of the forklift from 2 and calculate the relative distance between the operator and the forklift.

  As shown in FIG. 2, the mobile terminal 1 receives a radio signal from a data transmission / reception unit 11 that can wirelessly exchange data with the data processing device 3, and a radio wave from a GPS satellite S, and receives the three-dimensional A GPS receiver 12 that can output (measure) position data, and an alarm signal output unit (for example, an alarm signal output unit that receives alarm data received from the data processing device 3 via the data transmission / reception unit 11 and outputs a predetermined alarm signal) , Alarm sound, voice, etc.) 13, and the position data measured by the GPS receiver 12 is transmitted to the data processing device 3 via the data transmitter / receiver 11. Yes.

  Further, as shown in FIG. 3, the vehicle side position detection device 2 receives radio waves from the GPS satellite S and a data transmission / reception unit 21 that can wirelessly exchange data with the data processing device 3. Then, the GPS receiver 22 that can output (measure) the three-dimensional position data, and the position data obtained by the GPS receiver 22 are input and the map is displayed on the work area A (shown in FIG. 1). A position indicator (of course, having a display unit) 23 that can display position data and alarm data received from the data processing device 3 via the data transmission / reception unit 21 are input and a predetermined alarm signal is output. And an alarm signal output unit (for example, a generator for alarm sound, voice, etc.) 24, and the position data measured by the GPS receiver 22 is processed via the data transmitting / receiving unit 21. It is to be transmitted to the apparatus 3.

  Further, as shown in FIG. 4, the data processing device 3 includes a data transmitting / receiving unit 31 capable of wirelessly transferring data between the mobile terminal 1 and the vehicle side position detecting device 2, and the data A position confirmation unit 32 that inputs position data received by the transmission / reception unit 31 and confirms whether the worker M and the forklift C are located in the work area A, and at least the worker in the position confirmation unit 32 Is input in the relative distance calculation unit 33 for calculating the relative distance between the worker and the forklift, and the relative distance calculated by the relative distance calculation unit 33. An approach determination unit 34 that determines whether or not they are approaching each other by comparing with a predetermined set distance, and alarm data when it is determined that the approach determination unit 34 is approaching Together with an alarm data output unit 35 which force is provided, the alarm data is to be sent via respective data transceiver 31 to the mobile terminal 1 and the vehicle-side position detector 2.

Next, the loading and unloading work of the load in the above system will be described based on the overall configuration diagram of FIG. 1 and the flowchart of FIG.
As shown in FIG. 1, when the work W is being loaded and unloaded with the forklift C in the work area A together with the worker M, the mobile terminal 1 carried by the worker M and the vehicle provided on the forklift C In the side position detection device 2, the position data obtained by the GPS receivers 12 and 22 is sent to the data processing device 3 via the data transmission / reception units 11 and 21 (step 1). Note that the position indicator 23 of the vehicle side position detection device 2 always displays the position of the forklift C itself as in car navigation.

  In the data processing device 3, the position data of the worker M and the forklift C are input to the position confirmation unit 32, and it is determined whether or not these position data are within the work area A (step 2).

When the position confirmation unit 32 determines that the current position is within the work area A, the relative distance calculation unit 33 obtains the relative distance between the worker M and the forklift C (step 3).
Next, this relative distance is input to the approach determination unit 34 and compared with a preset set distance (step 4).

  When the approach determination unit 34 determines that the input relative distance is equal to or less than the set distance (that is, when approaching), the position data of the worker M is output to the vehicle-side position detection device 2. (Step 5), displayed on the position indicator 23.

  At the same time (or substantially at the same time), alarm data indicating that the worker M is located near the forklift C (is present) is output from the alarm data output unit 35, and this alarm data is the data of the data processing device 3. It is transmitted from the transmission / reception unit 31 to the mobile terminal 1 and the vehicle-side position detection device 2 (step 6).

Then, alarm data is sent from the data transmission / reception unit 31 to the mobile terminal 1 and the vehicle-side position detection device 2, and alarm signals are output from the respective alarm signal output units 13 and 24.
Accordingly, the operator of the worker M and the forklift C can easily and surely know that the worker M is approaching, so that the occurrence of an accident such as contact with the worker M can be prevented. Can do.

  On the forklift C side, the position of the forklift C and the position of the worker M are displayed on the display screen of the position indicator 23, and the driver of the forklift C can visually check the position of the worker M in real time. Can be grasped.

That is, in combination with the alarm signal, it is possible to reliably avoid contact accidents with workers.
When the position confirmation unit 32 determines that at least one (operator or forklift) is not in the work area A (step 2), the relative distance is not calculated and each position data is subsequently detected. Is called.

  When the approach determination unit 34 determines that the relative distance is larger than the set distance, the position data and warning data of the worker M are not transmitted, and each position data is subsequently detected.

  By the way, in the said embodiment, although demonstrated as a dedicated apparatus which reports the approach with a forklift as the portable terminal 1, the mobile phone which has a GPS receiving function can also be utilized, for example. Of course, when a mobile phone is used, the position data obtained by the GPS reception function can be transmitted to the data processing device 3, and the alarm data from the data processing device 3 can be received and the alarm signal can be output. Will be.

  Moreover, in the said embodiment, although the set distance compared with the relative distance of an operator and a forklift was made into one type, a different alarm signal is output according to the degree of approach by providing a step in the set distance. You may make it make it. For example, the set distance may be divided into two stages, and two types of alarm signals may be provided for near and far distances. Of course, three or more types of alarm signals may be output as necessary. In this case, the approach determination unit 34 provided in the data processing device 3 can be referred to as an approach degree determination unit that determines an approach degree, for example.

  Furthermore, in the above-described embodiment, the case of a forklift has been described as the working vehicle. However, the working vehicle is not limited to this, and may be a construction vehicle such as a bulldozer.

It is a figure which shows schematic structure of the relative position recognition system in the work area which concerns on embodiment of this invention. It is a block diagram which shows schematic structure of the portable terminal in the relative position recognition system. It is a block diagram which shows schematic structure of the vehicle side position detection apparatus in the relative position recognition system. It is a block diagram which shows schematic structure of the data processor in the relative position recognition system. It is a flowchart which shows the relative position recognition procedure in the relative position recognition system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile terminal 2 Vehicle side position detection apparatus 3 Data processing apparatus 11 Data transmission / reception part 12 GPS receiver 13 Alarm signal output part 21 Data transmission / reception part 22 GPS receiver 23 Position indicator 24 Alarm signal output part 31 Data transmission / reception part 32 Position confirmation Unit 33 Relative distance calculation unit 34 Approach determination unit 35 Alarm data output unit

Claims (2)

A system capable of recognizing the relative position of a worker and a work vehicle in a work area,
A portable terminal carried by an operator and having a GPS receiver and having an output function of worker position data measured by the GPS receiver;
A vehicle-side position detection device that is provided in the work vehicle and has a GPS receiver and has an output function of vehicle position data measured by the GPS receiver;
A relative distance calculation unit that inputs the worker position data from the portable terminal and the vehicle position data from the vehicle side position detection device and calculates the relative distance between the worker and the work vehicle, and the relative distance calculation unit A data processing device capable of outputting alarm data when the operator and the work vehicle are approaching by inputting the obtained relative distance and outputting the position data of the worker related to the alarm; ,
Further, the position data of the vehicle measured by the GPS receiver is input to the vehicle-side position detection device, and the position data of the worker related to the alarm is input, so that the work vehicle and the worker in the work area are input. A relative position recognition system in a work area, comprising a position indicator for displaying a position.   2. The relative position recognition system in a work area according to claim 1, wherein a plurality of warning signals are output in accordance with the relative distance.

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