JP6434295B2 - Safety management method and system around heavy machinery - Google Patents

Description

  The present invention relates to a safety management method and system around heavy machinery, and more particularly to a method and system for managing safety by preventing contact between a heavy machinery operated at a work site and a worker.

  In civil engineering and construction work sites (hereinafter referred to as work sites) that use civil engineering machinery (hereinafter referred to as heavy machinery) such as backhoes (hydraulic excavators), wheel loaders, bulldozers, and mobile cranes, work safety is ensured. In addition, prevention of contact accidents between heavy machinery and workers is an important issue. Conventionally, for example, detecting means such as an infrared sensor or an optical sensor is installed on a heavy machine to detect the distance to surrounding workers, and the heavy machine is stopped according to the detected distance or an alarm is given to an operator (operator) of the heavy machine Has been proposed. However, this method tends to cause an error due to the influence of the surrounding environment (for example, sunlight, wind, electromagnetic noise, etc.) and easily causes an erroneous detection of an approaching worker. On the other hand, a system for detecting an approaching worker around a heavy machine using a tag (hereinafter also referred to as an ID tag) that transmits an ID signal by radio waves or ultrasonic waves has been developed (Patent Documents 1 to 4). reference).

  For example, in Patent Document 2, as shown in FIG. 5A, a heavy machine 1 at a work site is equipped with a transmitter 22a that transmits a trigger ID for heavy machine identification together with a receiver 21a, and a work is performed in response to the trigger ID. A trigger ID type detection system in which an ID tag 30a for returning a worker ID is carried by a worker 8b is disclosed. FIG. 5B includes a receiver 21a, a transmitter 22a, an alarm device 23a, and their control device 10a. The trigger ID recorded in the storage means 16a of the control device 10a is transmitted to the trigger signal S1 (FIG. 5 (D)) shows the in-vehicle device of the heavy machine 1 that transmits the signal from the transmitter 22a.

  FIG. 5C shows a response signal S2 (FIG. 5) by combining the receiving unit (antenna) 32 that receives the trigger signal S1, the trigger ID in the input signal S1, and the worker ID recorded in the storage unit 37. The configuration of an ID tag (RFID tag) 30a including a processing unit 31 that generates (see (D)), a transmission unit 35 that returns a response signal S2 and an antenna 36 is shown. The ID tag 30a in the illustrated example includes an alarm output unit 33 that presents the received trigger ID (identification ID of the heavy machine 1) to the worker 8, a stop unit 34 that stops the alarm by the operation of the worker 8, and a power supply unit. (Battery) 38 is included.

  The trigger ID type detection system of the illustrated example receives the response signal S2 returned from the ID tag 30a of the worker 8b by the vehicle-mounted receiver 21a, and the trigger ID and work from the signal S2 by the receiving means 14a of the control device 10a. The member ID is extracted and input to the detection means 13a. Further, the detection means 13a compares the trigger ID in the response signal S2 with the trigger ID in the transmission signal S1 (the trigger ID recorded in the storage means 16a), and detects the presence of the approaching worker 8 when they match. Then, the alarm device 23a is driven, and if they are different, the signal S2 is ignored without driving the alarm device 23a.

  That is, according to the detection system of the trigger ID method, the trigger ID that can be identified for each heavy machine 1a, 1b is transmitted to the surroundings to form the approach detection areas Ta, Tb, and matches the trigger ID of each heavy machine 1a, 1b. Since only the response signal S2 can be detected as an approaching worker of each heavy machine 1a, 1b, for example, as shown in FIG. 6 (A), each heavy machine 1a, 1b is also used in a work site where a plurality of heavy machines 1a, 1b are operated. An approaching worker can be detected.

  Further, in the work site as shown in FIG. 5A, when a plurality of workers 8a and 8b irregularly change the operation / operation work of the heavy equipment 1 and the work around the heavy equipment 1, the operation work of the heavy equipment 1 If the ID tag 30a of the worker 8a returns the response signal S2 in response to the trigger ID, an unnecessary alarm is generated even though the other worker 8b is not approaching around the heavy machinery 1. . In such a case, for example, as disclosed in Patent Document 3, when the heavy equipment 1 is started, the operation worker 8a registers his / her worker ID in the storage unit 16a of the control device 10a of the heavy equipment 1 to Unnecessary alarms can be prevented from occurring.

  That is, in the trigger ID type detection system, the worker ID of the operation worker 8a is registered in the control device 10a of each heavy machine 1, and the trigger ID and the transmission signal in the response signal S2 are detected by the detection means 13a of the control device 10a. The trigger ID in S1 is compared, and the worker ID in the response signal S2 is compared with the registered worker ID. The alarm 23a is activated only when the trigger IDs match and the worker IDs are different. By driving, unnecessary alarms can be prevented and the reliability of detection of approaching workers can be improved.

JP 2011-163835 A JP 2012-053515 A JP 2014-031660 A JP 2014-177790 A

  However, in the conventional trigger ID type detection system, for example, as shown in FIG. 6B, when a plurality of heavy equipments 1a and 1b are operated while being approached, the other detection system Ta approaches the proximity detection area Ta of one heavy equipment 1a. There is a problem that an operation worker 8a of the heavy machine 1b enters, erroneously detects the operation worker 8a of the heavy machine 1b as a worker 8b approaching the heavy machine 1a, and issues an unnecessary alarm. As in the case of the operation worker 8a of each heavy machine 1a (or 1b) described above, if the worker ID of the operation worker 8a of another heavy machine 1b can also be registered in the control device 10a of each heavy machine 1a, It is possible to avoid erroneously detecting the operating worker 8a of another heavy machine 1b as an approaching worker 8b. However, in a work site where a plurality of workers 8a, 8b irregularly change the operation / operation of each heavy machine 1, the operator 8a of each heavy machine 1 is grasped in advance and the worker ID is registered. It is practically impossible to leave.

  In FIG. 6B, if each worker 8a is operated so as to stop (cancel) its own ID tag 30a when operating the heavy machinery 1a, 1b, the operation workers 8a of the other heavy machinery 1b are approaching workers. It is possible to avoid erroneous detection of 8b (see Patent Document 1). However, in such an operation, when the operation of the heavy equipment 1 is replaced with another worker 8b and the work around the heavy equipment is resumed, the stop (pause state) of the ID tag 30a must be released to return to the operating state. In other words, there is a risk of leading to an accident of the worker 8 who has forgotten to release the ID tag 30a. In order to accurately detect the approaching worker 8b of each heavy machine 1a, 1b in a work site where a plurality of workers 8a, 8b irregularly change the operation / operation work of the plurality of heavy machines 1a, 1b, Even when each heavy machine 1a, 1b approaches each other, a technique is required that can prevent erroneously detecting the operating worker 8a of another heavy machine 1b as the approaching worker 8b of the heavy machine 1a.

  Accordingly, an object of the present invention is to provide a safety management method and system around a heavy machine that can prevent erroneous detection between an approaching worker of each heavy machine and an operation worker of another heavy machine.

Referring to the embodiment of FIG. 1 and the flowchart of FIG. 2, the safety management method around the heavy machinery according to the present invention allows the worker 8 in the work site E to receive the trigger ID and the worker ID in response to the reception of the trigger ID. The ID tag 30 that returns the response signal S2 (see FIG. 5D) combined with the ID is held, and the heavy equipment 1 in the work site E triggers the heavy equipment unique ID with the strength that covers the proximity danger zone Tc around the heavy equipment A first transmitter 22 that is transmitted as an ID and a second transmitter 25 that transmits the driver's seat unique ID as a trigger ID with sufficient strength to cover the driver's seat range Td of the heavy machine 1 are mounted, and a response signal from each ID tag 30 When the response signal S2 including the heavy equipment unique ID is detected upon receiving S2, and the response signal S2 combining the worker ID and the driver seat unique ID in the response signal S2 is not detected, the proximity danger area around the heavy equipment 1 T Those obtained by detecting the approach of the operator 8 to (see step S102~S110 in the flow diagram of FIG. 2). When a response signal including the heavy equipment unique ID is detected and a response signal combining the worker ID and the driver seat unique ID in the response signal is detected , the worker ID of the worker ID to the proximity danger area around the heavy equipment is detected . You may avoid the approach detection of a worker .

Further, referring to the embodiment of FIG. 1, the safety management system around heavy machinery according to the present invention is possessed by each worker 8 in the work site E, and the trigger ID and the worker ID according to the reception of the trigger ID. ID tag 30 that returns a response signal S2 (see FIG. 5D) combined with, and a heavy equipment unique ID that is mounted on the heavy equipment 1 in the work site E and covers the proximity danger zone Tc around the heavy equipment. The first transmitter 22 that transmits as an ID, the second transmitter 25 that is mounted on the heavy machine 1 and transmits the driver's seat unique ID as a trigger ID with a strength that covers the driver's seat range Td on the heavy machine 1, and each ID tag 30 When the response signal S2 including the heavy equipment unique ID is detected and the response signal S2 combining the worker ID and the driver seat unique ID in the response signal S2 is not detected. Machine 1 is made of a detection device 13 that detects the approach of the operator 8 to surrounding proximity Critical Tc (see steps S102~S110 in the flow diagram of FIG. 2). The detector 13, when the response signal response signal combining the worker ID in the detected and the response signal and the driver's seat unique ID containing heavy equipment unique ID is detected, to a close danger zone around heavy equipment You may avoid the approach detection of the worker of the said worker ID .

  Preferably, as shown in steps S106 to S108 in the flowchart of FIG. 2, the detector 13 continues to receive the response signal S2 from each ID tag 30 for a predetermined period of time in the response signal S2 including the driver seat unique ID. The number of worker IDs is detected. A first transmitter 22 and a second transmitter 25 are respectively mounted on a plurality of heavy machines 1 in which workers in the work site E operate alternately, and a proximity danger zone Tc around the heavy machine 1 is detected for each heavy machine 1 by a detector 13. The approach of the worker 8 to can be detected. In this case, the driver's seat unique ID can be a common ID for a plurality of heavy machinery.

  In a preferred embodiment, when a plurality of heavy machines 1 are operated, the detector 13 is mounted on each heavy machine 1 to detect the approach of a worker to the proximity danger zone Tc around the heavy machine 1. In a further preferred embodiment, the detector 13 mounted on each heavy machine 1 receives responses from the first receiver 21 that receives the response signal S2 from the proximity danger zone Tc around the heavy machine 1 and the driver seat 5 of the heavy machine 1. And a second receiver 24 that receives the signal S2.

  In the safety management method and system around heavy machinery according to the present invention, the ID tag 30 returns a response signal S2 in which the trigger ID and the worker ID are combined to the worker 8 in the work site E in response to the reception of the trigger ID. The first transmitter 22 that sends the heavy machine unique ID as a trigger ID to the heavy machine 1 in the work site E with a strength that covers the proximity danger area Tc around the heavy machine and the driver seat range Td of the heavy machine 1 And a second transmitter 25 that transmits the driver's seat unique ID as a trigger ID with covering strength, and a response signal S2 including the heavy machinery unique ID is detected, and the worker ID and driver seat unique ID in the response signal S2 are detected. Since the approach of the worker 8 to the proximity danger zone Tc around the heavy machine 1 is detected when the response signal S2 combined with is not detected, the following effects are obtained.

(A) Each heavy machine 1 is equipped with a transmitter 25 that transmits the driver's seat unique ID as a trigger ID with a strength that covers the driver's seat range Td, and an ID tag 30 possessed by an operator (operator) 8 of each heavy machine 1 By returning a response signal S2 combining the driver's seat unique ID and the worker ID, the operator 8 of each heavy machine 1 can be identified from the response signal S including the driver's seat unique ID.
(B) Accordingly, each heavy machine 1 is equipped with a first transmitter 22 that transmits the heavy machine unique ID as a trigger ID with a strength that covers the proximity danger zone Tc around the heavy machine, and a response signal S2 including the heavy machine unique ID is provided. A worker who is detected and approaches the worker ID to the proximity danger zone Tc around the heavy machine 1 when the response signal S2 combining the worker ID and the driver seat unique ID in the response signal S2 is not detected. It can be determined that
(C) Further, in a work site where a plurality of heavy machinery 1 is operated, an approaching worker for each heavy machinery 1 is detected from the response signal S2 including the heavy machinery unique ID, and the operation work for each heavy machinery is determined from the response signal including the driver seat unique ID. By detecting the worker, erroneous detection of the approaching worker 8 of the heavy machine 1 and the operating worker 8 of the heavy machine 1 can be prevented.
(D) Further, even if the operator ID of the operator 8 is not registered in the control device 10 of each heavy machine 1 as in the prior art, the operation of the operator 8 from the response signal S including the driver seat unique ID is performed. The worker ID can be detected, and it can be prevented that the operation worker 8 of each heavy machine 1 is erroneously detected as an approaching worker.

Hereinafter, embodiments and examples for carrying out the present invention will be described with reference to the accompanying drawings.
It is a block diagram of one Example of the safety management system around the heavy machinery by this invention. It is an example of the flowchart which shows the safety management method around the heavy machinery by this invention. It is an example of the flowchart which shows operation | movement of the ID tag used by this invention. It is explanatory drawing of the Example which applied the safety management system of this invention to the work site where a heavy machine operate | works adjacently. It is explanatory drawing of an example of the safety management system around the conventional heavy machine. It is explanatory drawing of the Example which applied the conventional worker detection system to the work site where a heavy machine operate | works adjacently.

  FIG. 1A shows the present invention in a work site E in which a plurality of heavy machines 1 are operated and a plurality of workers 8a and 8b irregularly change the operation of each heavy machine 1 and the work around the heavy machines. An embodiment to which the safety management system is applied will be shown. Each heavy machine 1 is started when one of the workers 8a (or 8b) is started and driven as an operator (operator) when necessary, and stops after the necessary heavy machine work is completed, so that the worker 8a can work around. Return. The heavy machine 1 in the illustrated example has a traveling unit 2 such as a caterpillar for moving to an arbitrary place on the work site E, and a main body unit 3 mounted on the traveling unit 2 so as to be able to pivot 360 degrees. A hydraulic excavator (backhoe) in which a driver's seat 5 and a movable arm member 6 are provided in front of the body 3.

  Hereinafter, the present invention will be described with reference to the illustrated heavy machine 1, but the work site E to which the present invention can be applied is not limited to the illustrated example. For example, the safety management system of the present invention can also be applied to a work site E in which two or more workers 8a and 8b are operating irregularly by changing a single heavy machine 1. In particular, the safety management system of the present invention can detect the worker ID of the operating worker 8 who drives the heavy machine 1 from the response signal S including the driver's seat unique ID as described later. ), It is not necessary for the operator 8 to take time and register the worker ID when the heavy machinery 1 is started (operating), so that the workers 8a and 8b frequently change the operation of the heavy machinery 1. It is effective at the work site E.

  The safety management system of the illustrated example includes a trigger ID type first transmitter 22 and a second transmitter 25 that are mounted on a plurality of heavy machines 1 that are operated in the work site E and transmit trigger signals, respectively, ID tag 30 that each of the plurality of workers 8 possesses, and a detector 13 that receives a response signal from each ID tag 30 and detects the approach of the worker 8 to the proximity danger zone Tc around each heavy machine 1 And have. The detector 13 in the illustrated example is built in the control device 10 mounted on each of the plurality of heavy machines 1, and detects the approach of the worker to the proximity danger zone Tc around the heavy machine 1 in each heavy machine 1. However, the detector 13 is not necessarily installed in each heavy machine 1. For example, the detector 13 (or the detector 13 is placed at an appropriate position in the work site E where the response signal of the ID tag 30 of each worker 8 can be received. It is also possible to install the built-in control device 10) and collectively detect the approach of the worker 8 to the surrounding danger area of the plurality of heavy machinery 1 in the work site E.

  The ID tag 30 possessed by each worker 8 is of the trigger ID type that receives the trigger ID and returns a response signal S2 (see FIG. 5D) that combines the trigger ID and the worker ID. , A passive type or an active type that can secure a necessary communication distance can be arbitrarily selected and used. Desirably, a sufficiently long communication distance (for example, about 5 to 20 m) is secured by incorporating a power source (battery). An example of a preferred ID tag 30 includes a receiving unit (antenna) 32, a transmitting unit 35, an antenna 36, and a storage unit 37 for recording a worker ID, similar to the one described above with reference to FIG. , A semi-active RFID tag having a built-in power supply unit 38.

  FIG. 3 shows an example of a flowchart of a response operation by the ID tag 30. Step S201 in FIG. 3 indicates that the ID tag 30 is activated by receiving the trigger signal S1 (see FIG. 5D) and is in a standby state until the trigger signal S1 is received. When the trigger signal S1 is received, the trigger ID in the signal S1 is extracted in step S202, and the response signal S2 (FIG. 5D) is obtained by combining the trigger ID extracted in step S203 and the worker ID recorded in the storage unit 37. Reference) is generated, and the response signal S2 generated in step S204 is returned.

  As will be described later, in the present invention, the ID tag 30 of the worker ID includes the trigger signal S1 from the first transmitter 22 having the heavy equipment unique ID as the trigger ID and the second transmitter 25 having the driver seat unique ID as the trigger ID. 3 is activated by any one of the trigger signals S1, the response operation is common even when any trigger signal S1 is received, and the process waits until any trigger signal is received in step S201 in FIG. Further, there is no particular limitation on the combination method (generation method) of the trigger ID and the worker ID in step 203, and any method that can separate and extract both on the receiving side of the response signal S2 as will be described later. Can be combined.

  FIG. 1C shows a block diagram of the control device 10 mounted on each heavy machine 1. The control device 10 in the illustrated example includes a first transmitter 22 that sends a trigger signal S1 with a strength that covers the proximity danger zone Tc around the heavy machinery 1, and a trigger signal S1 that has a strength that covers only the driver's seat range Td of the heavy machinery 1. Is connected to a second transmitter 25 that transmits a response signal S2 from the ID tag 30, and an alarm 23 that generates an alarm in the driver's seat 5 of the heavy machine 1.

  As shown in FIG. 1 (B), the first transmitter 22 is provided at a site (for example, the main body 3) on the heavy machine 1 where a proximity danger zone Tc that can be a blind spot when viewed from the driver's seat can be set around the heavy machine 1. It may be installed and the trigger signal S1 may be transmitted with an intensity that reaches the entire proximity dangerous area Tc. Alternatively, the maximum work range of the heavy machinery may be set as the proximity danger zone Tc, and the trigger signal S1 may be transmitted with an intensity that reaches the entire proximity danger zone Tc. On the other hand, the second transmitter 25 is installed almost at the center of the driver's seat range Td of the heavy machine 1 (for example, the ceiling in the driver's seat 5), and sends the trigger signal S1 with a strength that covers the driver's seat 5, for example. The driver's seat range Td can be an inner region included in the approaching danger zone Tc. For example, it is sufficient to set it as a range that covers only the driver's seat 5, but the portion that protrudes outside the driver's seat 5 is included. May be.

  Further, the driver seat range Td of the second transmitter 25 may slightly deviate from the proximity danger zone Tc of the first transmitter 22. For example, when the heavy machine 1 is a vibrating roller or a bulldozer, the work range of the heavy machine is one direction in the front-rear direction, so the proximity danger zone Tc is set centering on the front-rear direction, but the driver seat range Td is the proximity danger zone Tc. However, the region may be set as a region that is relatively smaller than the proximity danger zone Tc but includes the outside of the proximity danger zone Tc. If the driver's seat range Td is set so as to protrude outside the driver's seat 5, there is an advantage that detection errors of workers seated in the driver's seat are reduced, but conversely, the driver's seat gets on the driver's seat. Since an ID tag of a worker who is not seated but is close to the driver's seat may be activated, it is effective to take measures as described later (steps S108 to S109 in the flowchart of FIG. 2). reference).

  Desirably, the transmission cycle of the first transmitter 22 and the transmission cycle of the second transmitter 25 are made different to prevent interference of the trigger signal S1 transmitted from both transmitters 22 and 25. As will be described later, in the present invention, the ID tag 30 of the worker ID is activated by both the trigger signal from the first transmitter 22 and the trigger signal from the second transmitter 25. If the transmission cycles overlap, the ID tag 30 may receive trigger signals from both transmitters 22 and 25 at the same time, and the response operation may become unstable. In order to return a reliable response signal S2 from the ID tag 30 to any of the trigger signals S1 from both transmitters 22 and 25, the transmission cycle of the first transmitter 22 and the transmission cycle of the second transmitter 25 It is desirable to avoid simultaneous trigger signal reception.

  In addition, after the transmission periods of the transmitters 22 and 25 are made different from each other in this way, the first transmitter 22 and the second transmitter are transmitted when the receiver 21 receives the response signal S2 from each ID tag 30 as described later. By waiting for a predetermined time longer than any transmission cycle of the transmitter 24, the response signals S2 from both transmitters 22 and 25 can be received more reliably. More preferably, the transmission periods of the first transmitter 22 and the second transmitter 25 and the predetermined reception time (hold time) of the receiver 21 waiting for the response signal S2 can be adjusted as appropriate at the work site E.

  Further, the control device 10 in FIG. 1C includes a storage means 16 for storing each heavy equipment unique ID (C) and each driver seat unique ID (D), and a trigger having the heavy equipment unique ID (C) as a trigger ID. Transmitting means 15 for transmitting a signal via the first transmitter 22, transmitting means 18 for transmitting a trigger signal whose trigger ID is the driver seat unique ID (D) via the second transmitter 25, and the trigger signal Receiving means 14 for receiving the response signal of the ID tag 30 via the receiver 21, and a detector (detecting means) 13 for detecting the approach of the worker 8 to the proximity danger zone Tc around the heavy machinery by the response signal. . When the control device 10 is a computer, the storage means 16 can be a primary memory or a secondary memory of the computer, and the transmission means 15 and 18, the reception means 14, and the detector 13 can be programs built in the computer.

  The heavy machine unique ID is for identifying the heavy machine 1 operating at the work site E. When operating a plurality of heavy machines 1, a different heavy machine unique ID is assigned to each. The driver's seat unique ID (D) is used to identify the occupant (operating worker 8) in the driver's seat of the heavy machinery 1. When operating a plurality of heavy machinery 1 in the work valve station E, each heavy machinery 1 It is desirable to assign different heavy equipment unique IDs to one driver's seat. By setting the driver's seat of each heavy machine 1 to a different heavy machine unique ID, the operator 8 driving each heavy machine 1 can be identified. In addition, when the capacity of the driver's seat of each heavy machine 1 is different from the heavy machine unique ID, it is desirable to store the capacity of the driver's seat of each heavy machine 1 in the storage unit 16 of the control device 10. However, the identification of the operator 8 of each heavy machine 1 is not required, and whether or not the driver 8 is in the driver's seat of the heavy machine 1 is reliably determined by the trigger signal S1 sent to the driver seat range Td. If it is possible to detect without excess or deficiency, the driver's seat unique ID may be a common ID for a plurality of heavy machinery.

  Desirably, the control device 10 receives the response signal S2 from the first receiver (antenna) 21 that receives the response signal S2 from the proximity danger zone Tc around the heavy machinery 1 and the driver seat 5 of the heavy machinery 1 as shown in the illustrated example. And a second receiver (antenna) 24 for receiving. The first receiver 21 receives the response signal S2 from the ID tag 30 in the proximity danger zone Tc, and the second receiver 24 receives the response signal S2 from the ID tag 30 in the driver seat range Td. Yes, if the ID tag 30 having a sufficiently long communication distance is used as described above, for example, only the receiver 21 installed in the main body 3 on the heavy machine 1 can be used from the ID tag 30 in the proximity danger zone Tc and the driver seat range Td. It is also possible to receive the response signal S2 together, in which case the receiver 24 can be omitted. However, as shown in FIG. 1A, the driver's seat 5 of the heavy machine 1 may be surrounded by a metal frame, and the response signal S2 from the ID tag 30 of the driver's seat 5 exceeds the metal frame. In such a case, the second receiver 24 that receives the response signal S2 from the driver's seat 5 is provided, so that the response signal S2 from the ID tag 30 can be provided. Can be expected to avoid receiving omissions.

  FIG. 2 shows a flowchart of the risk management method of the present invention for detecting the approach of the worker 8 to the proximity danger zone Tc around the heavy machine 1 equipped with the control device 10 using the control device 10 of FIG. The operation of the system of FIG. 1 will be described below with reference to the flowchart of FIG. In step S101 of FIG. 2, the detector 15 of the control device 10 obtains the heavy machine unique ID with the strength that covers the surrounding proximity danger zone Tc via the transmission means 15 and the first transmitter 22 of each heavy machine 1 as described above. Trigger signal (trigger specific trigger ID) S1 as a trigger ID is sent at a predetermined transmission cycle, and at the same time, the driver's seat unique ID is triggered with the intensity covering the driver's seat range Td from the transmission means 18 and the second transmitter 25 of each heavy machine 1 The process which sends out trigger signal (driver's seat specific trigger ID) S1 used as ID at a predetermined transmission cycle is shown. While transmitting both trigger signals S1, the detector 15 of the control device 10 in step S103 receives the ID from the surrounding proximity danger zone Tc and the driver seat range Td of the heavy equipment 1 via the receiver 21 and the receiving means 14 of the heavy equipment 1. Wait until the response signal S2 of the tag 30 is received.

  Steps 103 to S110 in FIG. 2 show processing when the response signal S2 from the surrounding proximity danger zone Tc and the driver seat range Td of the heavy equipment 1 is received. First, in step S104, the trigger ID and worker ID in the response signal S2 are extracted, and it is determined whether or not the trigger ID received in step S105 matches the heavy equipment unique ID recorded in the storage means 16. If the two are different, the received response signal S2 is transmitted from the ID tag 30 in the driver's seat range Td of the installed heavy machine or the surrounding proximity danger zone Tc of another heavy machine (or the driver's seat range Td of the heavy machine). Yes, since it is not transmitted from the ID tag 30 in the surrounding proximity danger area Tc of the mounted heavy machine, the response signal S2 is ignored and the process returns to step S103.

  In step S105 in FIG. 2, when the received trigger ID and the heavy equipment unique ID recorded in the storage means 16 match, the process proceeds to step S106, and the reception of the response signal S2 is continued for a predetermined time, and the received response signal S2 is received. Is stored in the storage means 16, for example. Since the response signal S2 to be waited for in step S106 is a response to the trigger signal S1 of the second transmitter 25, the trigger ID and the worker ID in the received response signal S2 are obtained in the same manner as in steps S104 to S105 described above. It is determined whether or not the trigger ID matches the driver seat unique ID, and the response signal S2 having the trigger ID different from the driver seat unique ID may be ignored and not accumulated. However, the response signal S2 different from the driver seat unique ID may be accumulated.

  The predetermined time for waiting for reception of the response signal S2 in step S106 can be set appropriately. However, as described above, when the transmission cycle of the first transmitter 22 and the transmission cycle of the second transmitter 25 are different, In step S107, it is desirable to wait for a longer time than the transmission period of both transmitters 22 and 24, and reception of the response signal S2 to the trigger signal S1 of the second transmitter 25 can be avoided.

  Step S107 in FIG. 2 shows processing for determining whether or not a response signal S2 that combines the worker ID extracted in step S104 and the driver seat unique ID recorded in the storage means 16 has been received. When such a response signal S2 is not received, the response signal S2 received in step S103 is not returned from the operator 8 who operates the heavy machinery 1, but works in the proximity danger zone Tc around the heavy machinery 1. It is determined that the response has been received from the member 8, and the process proceeds to step S110 to drive the alarm device 23 of the control device 10. In other words, when such a response signal S2 is received in step S107, the response signal S2 is returned from the operating worker 8 who operates the heavy machinery 1, and is a worker in the proximity danger zone Tc around the heavy machinery 1. Therefore, it can be determined that the response has not been made from 8, and the driving of the alarm device 23 (step S110) can be avoided.

  Steps S108 to S109 in FIG. 2 indicate that when a response signal S2 in which the worker ID and the driver seat unique ID are combined is received, it is not a response signal from the operating worker 8 who drives the heavy equipment 1. Indicates the process to determine / confirm. First, in step S108, a worker ID including such a driver seat unique ID is detected, and the number thereof is detected. Specifically, the number of worker IDs for each driver seat unique ID is detected. For example, the number of different worker IDs is detected from the response signal S2 including the driver seat unique ID accumulated in the storage means 16. For example, when it is detected in step S108 that the number of worker IDs including the driver's seat unique ID is one, the response signal detected in steps S103 and S107 is returned from the operating worker 8 who drives the heavy machinery 1. Since it is not necessary to drive the alarm device 23, the process returns to step S102.

  Step S109 in FIG. 2 shows a process of comparing the number of worker IDs including the driver seat unique ID detected in step S108 with the number of driver seats of the heavy machinery 1. For example, when the driver's seat of heavy equipment 1 has a capacity of one and the number of worker IDs including the driver's seat unique ID detected in step S108 is also one, the response signals detected in steps S103 and S107 are heavy equipment. 1 is determined to have been returned from the operating worker 8 driving 1, and the process returns to step S102. On the other hand, when the number of worker IDs including the driver's seat unique ID detected in step S108 is two or more, it exceeds the capacity of the driver's seat, and only the tag of the operator 8 driving the heavy machinery 1 is used. The tag of the worker 8 in the proximity danger zone Tc of the heavy machine 1 may have responded to the trigger signal S1 of the second transmitter 25. For this reason, it is determined that there is a possibility that the worker 8 exists in the proximity danger zone Tc of the heavy machinery 1, and the process proceeds to step S <b> 110 to drive the alarm device 23 of the control device 10.

  By comparing the number of driver seats of heavy machinery 1 with the number of driver seats of heavy machinery 1, for example, even if the number of driver seats of heavy machinery 1 is two or more, passengers (operating workers) 8) and the worker 8 in the proximity danger zone Tc approaching the heavy machine 1 can be distinguished. That is, for example, when the driver's seat of heavy equipment 1 has a capacity of two people and the number of worker IDs including the driver's seat unique ID detected in step S108 is also two or less, the response signal detected in steps S103 and S107. Can be determined to have been returned from the operator 8 of the heavy equipment 1, and the process can return to step S102 without driving the alarm device 23. On the other hand, when the number of worker IDs including the driver's seat unique ID detected in step S108 is three or more, it exceeds the driver's seat capacity, so the worker 8 is in the proximity danger zone Tc of the heavy machinery 1. It can be determined that there is a possibility of being present, and the alarm device 23 can be driven. Therefore, in order to eliminate detection errors of workers seated in the driver's seat, even if the driver's seat range Td is widened and includes a portion that protrudes outward, the driver's seat is close to the driver's seat. Thus, a worker who is not in the driver's seat and is in the proximity danger zone Tc can be reliably detected and warned as a dangerous worker.

  Step S110 in FIG. 2 shows a process of driving the alarm device 23 of the control device 10 to generate an alarm in the driver seat 5 of the heavy machine 1. If necessary, a monitor 20 can be connected to the control device 10 as shown in FIG. 1, and the worker ID of the worker 8 in which the intrusion into the proximity danger zone Tc is detected can be displayed on the driver's seat 5. It is. By notifying the operation worker 8 of the heavy equipment 1 by the alarm or the like that the approaching worker 8 in the surrounding danger zone Tc exists, the contact accident between the heavy equipment 1 and the approaching worker 8 can be prevented in advance.

  After generating an alarm in step S110, the process returns to step S102 to determine whether or not to end the safety management. When continuing a safety process, it progresses to step S103 from step S102, and repeats step S103-S110 mentioned above. When the safety process is terminated, the process proceeds to step S111, and the transmission of the heavy machine specific trigger ID signal S1 from each heavy machine 1 is stopped and the transmission of the driver seat specific trigger ID signal S1 is stopped.

  In FIG. 4A, by repeating steps S103 to S110 in the flowchart of FIG. 2, a plurality of heavy machines 1a and 1b are operated as in the conventional trigger ID method described above with reference to FIG. 6A. It shows that the approaching worker 8 can be detected for each heavy machine 1a, 1b at the work site. In addition, according to the flowchart of FIG. 2, a response signal S2 in which the driver's seat unique ID and the worker ID are combined is returned to the ID tag 30 possessed by the operator 8 of each heavy machine 1, and the driver's seat unique ID is returned. Since the operator 8 of each heavy machine 1 can be identified from the response signal S included, even when a plurality of heavy machines 1a, 1b are operated as shown in FIG. 4B, each heavy machine 1a, It is possible to prevent erroneous detection between the approaching worker 8 in the surrounding danger zone Tc of 1b and the operating worker 8 of each heavy machine 1a, 1b.

  In this way, it is possible to achieve the “safety management method and system around heavy equipment that can prevent erroneous detection between an approaching worker of each heavy machine and an operating worker of another heavy machine”, which is an object of the present invention.

  As described above, the embodiment of the present invention applied to the work site E in which a plurality of workers 8a and 8b alternate between the operation work of the heavy machinery 1 and the surrounding work of the heavy machinery 1 has been described. The work is not limited to these, and may include, for example, an operation of a transporting machine (such as a dump truck) other than the heavy machine 1. When such a worker 8 passes the proximity danger zone Tc of the heavy machine 1 while operating the transporting machine, the response signal S2 returned by the worker 8 on the transporting machine, and the response of the worker 8 working around the heavy machine 8 If the response signal S2 to be returned cannot be identified, the worker 8 on the transporting machine passing around the heavy machinery is erroneously detected even though the worker 8 is not approaching the proximity danger zone Tc around the heavy machinery. An unnecessary alarm may be generated. According to the safety management system of the present invention (flow chart of FIG. 2), by mounting the second transmitter 25 described above on such a transport machine, the worker 8 working around the heavy machinery and the worker on the transport machine. 8 can be identified.

  That is, a transport machine such as a dump truck may not need to set the proximity danger zone Tc like the heavy machine 1 for safety management reasons, and sends the trigger signal S1 with a strength covering the proximity danger zone Tc. There is a case where it is not necessary to mount one transmitter (first transmitter having a heavy machine unique ID as a trigger ID) 22. However, even in such a case, the second transmitter 25 (the second transmitter having the driver seat unique ID as the trigger ID) 25 that transmits the trigger signal S1 with the strength covering the driver seat range Td may be mounted on the transport machine. For example, the response signal S2 including the driver seat unique ID can be returned from the ID tag 30 of the worker 8 who operates the transporting machine. If the worker 8 on the transporting machine returns the response signal S2 including the driver's seat unique ID, the response signal S2 including the heavy machinery unique ID is received from the worker 8 on the transporting machine in step S103 of the flowchart of FIG. Even so, it is determined in steps S105 to S109 that the response is not made by the worker 8 in the proximity danger zone Tc around the heavy machinery, and unnecessary driving of the alarm device 23 can be avoided. Note that a transport machine such as a dump truck in which the first transmitter 22 is mounted together with the second transmitter 25 can be regarded as the heavy machine 1 in the present invention.

DESCRIPTION OF SYMBOLS 1 ... Heavy machine 2 ... Traveling part 3 ... Main-body part 5 ... Driver's seat 6 ... Movable arm member 8 ... Worker 10 ... Control apparatus 13 ... Detection means (detector) 14 ... Reception means 15 ... Transmission means (transmitter) 16 ... Storage means 17 ... Reception means 18 ... Transmission means (transmitter)
20 ... Monitor 21 ... Response signal receiver (receiving antenna)
DESCRIPTION OF SYMBOLS 22 ... Trigger signal transmitter 23 ... Alarm device 24 ... Response signal receiver (reception antenna) 25 ... Trigger signal transmitter 30 ... ID tag 31 ... Processing part 32 ... Reception part 33 ... Alarm output part 34 ... Stop part 35 ... Transmission Unit 36 ... Transmitting antenna 37 ... Storage unit 38 ... Power source C ... Heavy equipment unique ID D ... Driver's seat unique ID
E ... Work site Tc ... Heavy machine unique trigger ID reach range Td ... Driver's seat unique trigger ID reach range

Claims (11)

Each worker in the work site possesses an ID tag that returns a response signal that is a combination of the trigger ID and the worker ID in response to reception of the trigger ID, and the heavy machinery in the work site is in close proximity to the heavy machinery. A first transmitter that transmits a heavy machine unique ID as a trigger ID with strength covering the area, and a second transmitter that transmits a driver seat unique ID as a trigger ID with strength covering the heavy machine, When a response signal including a heavy equipment unique ID is detected by receiving a response signal from the ID tag, and a response signal combining the worker ID and the driver seat unique ID in the response signal is not detected, the proximity danger around the heavy equipment Management method around heavy machinery by detecting the approach of workers to the area. 2. The method according to claim 1, wherein a response signal including a heavy equipment unique ID is detected by receiving a response signal from each ID tag, and a response signal combining the worker ID and the driver seat unique ID in the response signal is provided. when it is detected, the safety management of around heavy equipment made to avoid worker proximity detection of the worker ID to a close danger zone around heavy equipment. 3. The safety around a heavy machine according to claim 1 or 2, wherein the reception of the response signal from each ID tag is continued for a predetermined time and the number of worker IDs in the response signal including the driver seat unique ID is detected. Management method. 4. The method according to claim 1, wherein the first transmitter and the second transmitter are respectively mounted on a plurality of heavy machines that are operated alternately by workers in the work site, and each heavy machine is surrounded by the heavy machine. A safety management method around heavy machinery by detecting the approach of workers to the proximity danger area. The method of claim 4, wherein the driver seat unique ID is a common ID for a plurality of heavy equipment. An ID tag that is carried by each worker in the work site and returns a response signal that is a combination of the trigger ID and the worker ID in response to reception of the trigger ID, mounted on the heavy machine in the work site, and around the heavy machine A first transmitter that transmits a heavy machine unique ID as a trigger ID with a strength covering the proximity danger area of the vehicle, and a driver seat unique ID that is mounted on the heavy machine and covers a driver seat range on the heavy machine as a trigger ID. 2 Response signals from the transmitter and each ID tag are received, a response signal including a heavy equipment unique ID is detected, and a response signal combining the worker ID and the driver seat unique ID in the response signal is not detected A safety management system around heavy equipment that is equipped with a detector that sometimes detects the approach of workers to the proximity danger area around heavy equipment. 7. The system according to claim 6, wherein the detector receives a response signal from each ID tag and detects a response signal including a heavy machine unique ID, and determines a worker ID and a driver seat unique ID in the response signal. A safety management system around heavy equipment that avoids detection of the approach of the worker of the worker ID to the proximity danger area around the heavy equipment when the combined response signal is detected. The system according to claim 6 or 7 , wherein the detector continuously receives a response signal from each ID tag for a predetermined time to detect the number of worker IDs in the response signal including the driver seat unique ID. A safety management system around heavy machinery. The system according to any one of claims 6 to 8, wherein the first transmitter and the second transmitter are respectively mounted on a plurality of heavy machines that are operated alternately by workers in the work site, and each heavy machine is detected by the detector. A safety management system around heavy equipment that detects the approach of workers to the proximity danger area around the heavy equipment. The system of claim 9, the safety management system around heavy equipment made by mounting each said detector to a plurality of heavy equipment. 11. The system according to claim 10, wherein the detector includes a first receiver that receives a response signal from a proximity danger area around the heavy machinery and a second receiver that receives a response signal from a heavy machinery driver's seat. Safety management system around heavy machinery.