JP3048568B1 - Emergency call system - Google Patents

Abstract

[Summary] [Problem] Even in a remarkable noise environment such as a production site, a monitoring worker who discovers an abnormal situation immediately informs nearby workers and related departments of his / her own voice by using his / her voice. And an emergency notification system that enables prompt acquisition of emergency information from a separately established abnormality detection system as long as there are workers at the production site. A host computer synthesizes an emergency communication channel for transmitting a real voice from a mobile terminal, an abnormal data transmission channel for transmitting abnormal detection data from an abnormal communication radio transmitting terminal, and speech synthesis data corresponding to the abnormal detection data. A line having a broadcast channel to inform interested parties
Communication means for setting the emergency communication channel with the highest priority and then setting the broadcast channel with the highest priority.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an emergency notification system at a production site.

[0002]

2. Description of the Related Art Conventionally, when a monitoring worker finds any abnormality while patroling a production facility in operation, the operator is immediately notified of the abnormality to a worker located somewhere in the vicinity, and the danger is raised. Must be swiftly avoided, and urgent action may require assistance. In addition, relevant departments must be notified of the situation promptly and encouraged to take appropriate measures. In such a case, as a means of communicating the occurrence of the abnormal situation and its contents, as in the example of the 119 or 110 telephone report, the discovery person's own voice communicates the emotion of the person Therefore, it can be said that it is a hand throw that functions extremely effectively.

[0003] However, in a remarkable noise environment such as a production site, such communication by a real voice often has little effect unless a loudspeaker is used. That is, no matter how loud a voice is made, there are extremely many cases where the noise is drowned out by remarkable noise. Of course, it is also necessary to sound an emergency alert bell, blink an abnormal display lamp, or play an emergency message recorded in tape from a speaker installed at an appropriate place. It can be a countermeasure, but no matter which of them you take,
It cannot perform the function of accurately communicating the contents of an abnormal situation, as in the case of communication by voice. In other words, it is not possible to accurately and promptly communicate messages with different content on a case-by-case basis, such as "what part, what abnormality has occurred, and what action should be taken". . On the other hand, Japanese Patent No. 2766215
Japanese Patent Application Laid-Open Publication No. H11-157, discloses a technique relating to a system for reporting an abnormality of a production facility using a wireless communication system. According to the reporting system disclosed therein, even when a person to be qualified is relatively far away, the person to be contacted is searched for and called.

[0004]

However, since this reporting system is not designed to make a communication using a real voice, for the reasons described above, there is an immediate delay such as the occurrence of an emergency. In no case where such is not allowed, it can never be an effective reporting system.

[0005] When an abnormal situation occurs, the discoverer is
We must promptly inform the concerned parties. In order to do so, the necessary contact action can be taken immediately at the place where it was found. That said, there is no guarantee that other workers will be alert to avoid the danger. The larger the production line becomes, the more situations where even its appearance cannot be seen. Further, it is not difficult to imagine that the noise at a production site where the noise is intense will no longer be heard and the purpose of the communication will not be achieved at all.

The present invention has been made in view of the above problems, and even in a remarkably noisy environment such as a production site, a monitoring worker who has discovered an abnormal situation can use his / her own voice to the surrounding workers and related departments. Provides an emergency notification system that enables immediate notification of the contents to be notified, and enables prompt acquisition of emergency information from a separately constructed abnormality detection system as long as workers are present at the production site The purpose is to do.

[0007]

Emergency call system of the present invention According to an aspect of the human voice in emergency channel with detection abnormality data convey abnormality data transmission channel and the detection abnormality data tell
A broadcast channel that communicates the corresponding speech synthesis data to the parties concerned
And the emergency communication channel having the highest priority.
And a communication means for setting the broadcast channel with priority.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing an overall configuration of an emergency call system according to one embodiment of the present invention. A production equipment abnormality detection system 1 is constructed for a production plant. At an important part of the production equipment abnormality detection system 1, when an abnormal situation is detected, the emergency information is assembled as an "abnormal communication packet",
An "abnormal communication wireless transmission terminal" 11 for wireless transmission (packet mode terminal: PT: having a function of assembling and disassembling a packet) is provided.

On the other hand, in a factory building, LAN cables 21 are laid in a bus topology on walls and ceilings around the production plant of interest.
Is a terminating resistor), and a "wireless relay module" 22 is connected to a necessary portion thereof. The wireless relay module 22 receives and relays the “abnormal communication packet” from the abnormal communication wireless transmission terminal 11 and transmits it to the host computer 3 that controls and manages the present system.

[0010] The bus topology generally has the disadvantage that the throughput decreases as the traffic increases, but the discovery of abnormal situations does not occur so frequently as in the operating environment of the emergency call system according to the present invention. Rather, the bus topology is adopted from the viewpoint of reliability that the cause of failure at each terminal is limited to that terminal and does not spread to the network.

Further, as shown in FIG. 2, the mobile terminal 4
A radio transceiver (image of a mobile phone) carried by a worker who monitors the orbit of the production plant and worn on a safety helmet. The mobile terminal 4 generates an emergency signal when the operator turns on the emergency contact switch 41 worn on the waist belt, and wirelessly communicates with the host computer 3 via the wireless relay module 22 (voice data communication).
Is available.

As described above, the bus-type topology laid around the production equipment includes a plurality of fixed abnormal communication radio transmission terminals 11 via the radio relay module 22,
A plurality of mobile terminals 4 serving as mobile stations having the same number of monitoring workers are wirelessly connected. However, in the case of the bus type topology, since each terminal has equal authority for data transmission, when the plurality of terminals start transmission at the same time,
Transmission data collision occurs. Therefore, in this embodiment, a unique access control method is used.

Generally, wireless LAN access methods include:
There are multiple access method and random access method,
In the present embodiment, the multiple access method is used. Here, the multiple access scheme, the finite communication Chi catcher
The, channel shared by a plurality of devices, a method of controlling so as to be used simultaneously, the random access scheme, although one communication channel to a number of devices used in a random, in which case, access method Is controlled so that one device can communicate. FIG. 3 is a diagram illustrating communication data and a flow of the communication data according to the present embodiment. The wireless relay module 22 wirelessly receives the abnormal connection packet data transmitted from the abnormal communication wireless transmission terminal 11 and transmits the abnormal connection packet data to the host computer 3 by cable. Further, voice data is transmitted / received to / from the mobile terminal 4 by radio.

[0014] Emergency voice operator emits moving is converted into voice data in the mobile terminal 4, through the emergency communication channel to the top Le. The emergency channel to that by turning on the emergency switch 41 by the operator is wearing the waist belt shown in FIG. 2, emergency signal is transmitted to the host computer 3, immediately as a common communication line of the entire system It has a dedicated channel to an emergency that is preferentially set. Further, when the abnormal communication packet data is received, the host computer 3 decodes the data contents, synthesizes and converts the data contents into voice data of the abnormal communication contents, and transmits the data to the related person (the worker having the mobile terminal 4 and the related department management computer). through broadcast channel to the speaker 51) from 5, performs notification broadcast.

FIG. 4 is a diagram showing an example of abnormally rated packet data according to the present embodiment. The abnormal communication packet data includes “where, when, and what kind of abnormality occurred in the production plant with the host computer 3 as the communication partner (for example, at 10:20 in the second drying chamber, (Temperature drop abnormality has occurred). " F in the header is a flag sequence, which indicates the beginning and end of the frame. In the present embodiment, the communication partner is always fixed to the specific host computer 3, and the destination address corresponds to the host computer 3. The source address is the second in the above example.
It corresponds to a drying chamber. The frame length is
Indicates the length of the entire packet. The information field indicates the content of the abnormal notification and is composed of 256 octets of data. The delimiter is a delimiter for communication sent from the terminal. F
CS is a frame check sequence and uses an error control CRC (cyclic check code).

FIG. 5 is a diagram showing an example of a voice data conversion table for abnormal communication packet data. A voice representing a location corresponding to each source address, for example, “Dicyansum chamber” is registered, and the particle “de” is registered.
To make a synthesized speech. Similarly, the abnormality detection time is
Register the voice corresponding to the hour and minute
To make a synthesized speech. As for the abnormal contents, voice data corresponding to each abnormal content is registered, and the entirety of the transmission source address, the abnormality detection time, and the abnormal contents is defined as synthesized speech.

In transmitting a data packet from each abnormally associated packet radio transmission terminal, a random access type CSMA / CA (Carrier Sense Multiple Acces) is used.
s / Collision Avoidance).
In this method, a node transmitting a packet transmits a pulse train having a random time interval before transmitting the packet, and during this period (called a collision detection window).
By detecting whether or not a pulse is received from another node, it is determined whether or not a collision occurs during a subsequent packet transmission period. In this way, collision is avoided even if two or more abnormal communication packets are transmitted. Also, if the emergency channel to and Dohochi turbocharger, channel is set, the different regular price packet is transmitted is prevented.

[0018] As described above, in this embodiment, in order to convey the worker real voice that found abnormal situation, and preferentially set emergency communication path for channel to be decodes the detected abnormal data which Te selectively and broadcast channel to to tell the persons concerned by synthesizing converted into voice data and the contents, the 3 Tsunochi catcher, channel of abnormal data transmission, channel for transmitting the detected abnormal data And In that case, a CDMA (code division multiple access) system (also called a spread spectrum system) is used. The reason is that even in an environment where there are many radio interference factors, such as a production site, information transmission can be performed accurately, that is, the wireless communication system is strong in a noise communication environment.

[0019] In CDMA system, the channel to split is performed by dividing the power by the code (spreading code). According to this method, transmission information is spread over a wide frequency band and radiated, so that it is not affected by obstacles such as a partition and the transmission power is small, and noise and multipath fading are reduced. Even strong communication can be realized. The above spread spectrum method includes:
There are two types of systems, direct spreading and frequency hopping, both of which use dual modulation of primary and spreading modulation, which modulates the carrier with a transmission code,
The spectrum is spread over a wide frequency band around the carrier frequency.

FIG. 6 is a block diagram showing a configuration of a transceiver of the spread spectrum system. FIG. 6A shows a transmitter, in which an information signal modulates a carrier wave 62 by a primary modulator 62, modulates it with a spreading code from a spreading code generator 64 by a secondary modulator 63, and transmits it from an antenna 65. . FIG.
(b) shows a receiver, and the RF received from the antenna 71
After the signal is limited to a desired band by an RF filter 72, the signal is correlated with a spreading code (the same as that on the transmitter side) from a spreading code generator 74 by a mixer 73 to obtain a BPF.
At 75, the band is further limited to a desired band and demodulated at 77 to obtain an information signal. The synchronization signal is acquired by the synchronization circuit 76 to synchronize the spread code generator 74. On the receiver side, the original signal is reproduced by collecting and demodulating the spread spectrum (this is called despread modulation). In this case, a large output is obtained only when the phase of the code used for correlation detection matches the code of the received radio wave, so that it can be distinguished from other spread signals. Even if the spread signal is lower than the noise level, the original signal can be correctly reproduced because the noise has no correlation. As described above, the spread spectrum method maps a signal to a much wider band than the bandwidth required for transmitting information and transmits the signal, and the receiver side converts the received signal to the original information bandwidth. By inverse mapping inside,
This is a technique for restoring a desired signal.

The wireless LAN used in the present embodiment
Will use the 2.4 GHz (ultra high frequency) band ISM (Industrial Scientific and Medical) band.
There is an advantage that a wireless station license is unnecessary, and a data transmission speed of 2 Mbps can be realized. FIG. 7 is a block diagram showing the configuration of the host computer 3. The data receiving unit 31 receives a signal including control data and packet data from the LAN cable 21, and the control data is analyzed by the LAN management unit 32 and the timer 35 a
Is sent to the control unit 35 having The packet data is fetched by the packet data fetching unit 33, and the packet data decomposing unit 34 fetches data indicating the content of the abnormality and sends it to the control unit 35. The control unit 35 refers to the memory 36 having the voice data conversion table, causes the voice data synthesis unit 37 to perform voice synthesis corresponding to the content of the abnormality, and controls the data transmission unit 38 by the LAN management unit 32 to control the LAN.
The synthesized voice is transmitted to the wireless relay module 22 via the cable 21. Further, the control unit 35 is a communication unit 3 outside the system.
The abnormal contents are transmitted to another system through the local communication circuit via the communication line 9. FIG. 8 and FIG.
It is a flowchart explaining operation | movement of (1). First, it is determined whether or not the system power is ON (step S1). If NO, the process waits until the system power is turned ON. If yes,
Initial settings such as data are performed (step S2).

Next, in step S3, a data link is established with each of the wireless relay modules 22, a communication line with the related department management computer 5 is set, and operation management of all systems is started. Then, a standby process is started (step S5). That is, it is determined whether or not to stop the system operation (step S6). If the system operation is to be stopped at YES, a system operation stop process is performed (step S7), and the flow ends. If the system operation is to be continued with NO, the process proceeds to FIG. 9, and it is determined whether or not abnormal communication packet data is received from the wireless relay module 22 (step S8). If NO, the process proceeds to step S5. Return to continue the standby processing state,
If the abnormal communication packet data is received in YES, the received data is decoded (step S9), the synthesized data is converted into voice data corresponding to the abnormal contents (step S10), and an emergency signal is transmitted to the wireless relay module 22. (Step S
11) The current data link is switched to the voice data link corresponding to the broadcast channel (step S12), and the converted synthesized voice data is transmitted to all the wireless relay modules 22 and the related department management computers 5 (step S12). S13 and step S14). Further, it is determined whether or not new abnormal communication packet data has been received by the wireless relay module 22 (step S15). If NO, the process returns to step S13 to continue the transmission of the converted synthesized voice data, and YES When new abnormal communication packet data is received, the data indicates that the transmission of the alarm may be stopped by, for example, starting an action for an abnormal situation, so that the wireless relay module 22 is instructed to stop transmitting ( Step S16), and return to step S5.

FIG. 10 is a block diagram showing the configuration of the wireless relay module 22. A signal including voice data and control data from the LAN cable 21 is transmitted to the data receiving unit 19.
Is received, the control data is analyzed by the LAN management unit 18 and sent to the control unit 12 having the timer 12a. The received voice data is transmitted via the radio unit 14 and the antenna 13. A reception signal including packet data and voice data from the antenna 13 is received by the radio unit 14, the packet data is captured by the packet data capturing unit 15, and the voice data is captured by the voice data capturing unit 16.
The control unit 12 controls the data transmission unit 17 by the LAN management unit 32 to transmit a signal including packet data and audio data to the host computer 3 via the LAN cable 21. 11 to 13 are flowcharts illustrating the operation of the wireless relay module 22. First, it is determined whether or not the system power is ON (step S21). If NO, the process waits until the system power is turned ON. If YES, initial settings such as data are performed (step S2).
2).

Next, at step S23, a relay data link for an abnormal data transmission channel is established between the host computer 3 and the abnormal communication radio transmitting terminal 11,
In the normal case, it is used for packet transmission of process management information and the like. Then, a standby process is started (step S2).
4). That is, it is determined whether or not to stop the system operation (step S25). If the system operation is to be stopped with YES, the system operation stop processing is performed (step S26), and the flow ends. If the system operation is to be continued with NO, the process proceeds to FIG. 12 and an emergency signal is issued from the mobile terminal 4 (generated when the monitoring operator turns on the emergency contact switch 41 to transmit voice data).
Is determined (step S27), and YES is received.
, The process proceeds to FIG. 13 and thereafter (step S28).
In steps S33 to S33), only one wireless relay module 22 that has received the emergency signal operates to reject the abnormal communication packet data (step S28), and replaces the current data link with the voice data link corresponding to the emergency communication channel. Switching is performed (step S29). Then, it is determined whether or not voice data has been received (step S30). If NO, the process waits until the voice data is received. If YES, the received voice data is transmitted from the data transmission unit 17 (step S30). S31). Here, the host computer 3 is not involved. Next, it is determined whether or not there is an instruction to stop data transmission by the monitoring operator turning off the emergency contact switch 41 at the mobile terminal 4 (step S3).
2) If there is no instruction in NO, the transmission of the audio data is continued, and if there is an instruction to stop in YES, the data transmission is stopped (step S33) and the process returns to step S24.

If NO in step S27 and an emergency signal has not been received, it is determined whether or not abnormal communication packet data has been received from abnormal communication radio transmitting terminal 11 (step S34). The abnormal communication packet data is transferred to the host computer 3 (step S35), and it is determined whether or not the reception has been performed by the host computer 3 (step S36). If NO, the packet data is retransmitted, and if YES, the packet data is received. Then, the process returns to step S24.

If it is NO in step S34 and the abnormal communication packet data has not been received, it is determined whether or not an emergency signal has been received from the host computer 3 (step S38). Step S
Returning to 24, if YES and an emergency signal is received,
The current data link is switched to the audio data link corresponding to the broadcast channel (step S39). Then, it is determined whether or not voice data has been received from the host computer 3 (step S40). If NO, the process waits until it is received. If YES, the received voice data is repeatedly transmitted by radio. (Step S41) Then, it is determined whether or not there is an instruction to stop transmission from the host computer 3 (Step S42). If there is no instruction, the wireless transmission of voice data is continued, and if YES, an instruction to stop is issued. If there is, stop radio transmission and return to step S24.

FIG. 14 is a block diagram showing a configuration of the mobile terminal 4. As shown in FIG. Normally, audio data is received from the diversity antenna 43 via the wireless unit 44 controlled by the control unit 42 having the timer 42a, demodulated by the data demodulation unit 45, and output from the audio output unit 46 as audio. When an abnormal situation occurs, the operator's voice input from the voice input unit 47 is turned on by turning on the emergency contact switch 41, so that the voice data conversion unit 4 controlled by the control unit 42.
The digital signal is converted into a digital signal at 8, modulated by a data modulation section 49, and transmitted from the radio section 44 via the diversity antenna 43. FIGS. 15 and 16 are flowcharts illustrating the operation of the mobile terminal 4. First, it is determined whether or not the system power is ON (step S51). If NO, the process waits until the system power is turned ON. If YES, initial settings such as data are performed (step S52).

Next, in step S53, a standby process is started. That is, it is determined whether or not to stop the system operation (step S54). If the system operation is to be stopped with YES, a system operation stop process is performed (step S55), and the flow ends. If the system operation is to be continued with NO, the process proceeds to FIG. 16 and it is determined whether or not the emergency communication switch 41 is ON (switch 56).
If the switch is not turned on at O, the diversity antenna 43 selects radio waves on which voice data with a large electric field strength is present, that is, data from the wireless relay module 22 near the broadcast channel (step S57), and receives the data. The audio data is demodulated (step S58), and it is determined whether there is no audio output for a predetermined time (step S59), and NO
If there is an output, the output is continued, and if there is no audio output for a predetermined time period, the process returns to step S53.

If YES in step S56 and the emergency contact switch 41 is turned on, it is determined whether or not there is a voice input (step S60). If there is, the input voice is converted into digital data, modulated, and transmitted wirelessly (step S61). Next, it is determined whether or not the voice data transmitted by the wireless relay module 22 has been received (step S62). If the voice data has not been received, the voice data is retransmitted (step S63), and the voice data has been received. For example, the wireless transmission of voice data is continued, and it is determined whether or not the emergency contact switch 41 is turned off (step S65). If the answer is NO, the wireless transmission is continued. If the answer is YES, the emergency contact switch 41 is turned off. Then, the process returns to step S53. Note that the present invention is not limited to the above embodiment.

[0030]

As described above, according to the present invention, it is possible to greatly contribute to ensuring the safety of workers (prevention of occupational accidents). In the case of continuous production, appropriate measures are taken promptly by the relevant upstream and downstream production departments that have been notified of the emergency, so that unproductive products are steadily expanded. Is prevented from being
Since the defect rate can be greatly reduced, it can greatly contribute to stable production. In particular, according to the present invention,
Report the real voice of the contractor with the highest priority, and then detect abnormal data
Can be notified by voice synthesis data.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an emergency call system according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state in which the mobile terminal according to the present embodiment is mounted.

FIG. 3 is a diagram illustrating communication data and a flow of the communication data according to the present embodiment.

FIG. 4 is a diagram illustrating an example of abnormal unified packet data according to the present embodiment;

FIG. 5 is a diagram showing an example of a voice data conversion table of abnormal communication packet data.

FIG. 6 is a block diagram showing a configuration of a spread spectrum transceiver.

FIG. 7 is a block diagram illustrating a configuration of a host computer according to the present embodiment.

FIG. 8 is a flowchart (part 1) for explaining the operation of the host computer of the present embodiment;

FIG. 9 is a flowchart (part 2) illustrating the operation of the host computer of the present embodiment.

FIG. 10 is a block diagram illustrating a configuration of a wireless relay module according to the present embodiment.

FIG. 11 is a flowchart (part 1) for explaining the operation of the wireless relay module according to the present embodiment;

FIG. 12 is a flowchart (part 2) illustrating the operation of the wireless relay module according to the present embodiment.

FIG. 13 is a flowchart (part 3) for explaining the operation of the wireless relay module according to the present embodiment;

FIG. 14 is a block diagram illustrating a configuration of a mobile terminal according to the present embodiment.

FIG. 15 is a flowchart (part 1) illustrating an operation of the mobile terminal according to the present embodiment.

FIG. 16 is a flowchart (part 2) illustrating an operation of the mobile terminal according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Production equipment abnormality detection system 11 Abnormal communication wireless transmission terminal 21 LAN cable 22 Wireless relay module 4 Mobile terminal 41 Emergency communication switch

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Claims (1)

(57) [Claims] [Claim 1] convey the detecting abnormal data and the emergency communication channel to convey the human voice abnormal data transmission channel and the detection abnormality
Broadcasting that conveys speech synthesis data corresponding to the data to the parties concerned
And the line having a channel, the emergency contact channel top
Communication means for setting the broadcast channel first, and then setting the broadcast channel first.