JP2007018482A - Separation detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and inexpensive separation detector capable of performing highly stable and reliable alarm operation without causing mutual radio interference even when there are many carrying persons involved, and capable of identifying and recognizing many carrying persons by means of a device carried about by an observer. <P>SOLUTION: A control display unit comprises an access code generator for generating individually identifiable access codes; a call signal transmitter for transmitting to a portable device a call signal wave modulated by output from the access code generator; a response signal receiver for receiving a response signal from the portable device assigned with an individual access code; a response signal detector for detecting the response signal included in the output from the response signal receiver; and an alarm display unit for alarming a user when the response signal cannot be detected. The portable device receives the call signal wave, detects its assigned access code included in the received output, and transmits the response signal wave by means of the access code. The control display unit and at least one or more portable devices allow an observer to identify and recognize many carrying persons without causing radio interference. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

Detailed Description of the Invention

The present invention is used to notify that a kindergarten child or a patient with dementia has left the range of the caregiver or the watcher, and to assist in the discovery when the carry-on item is left behind. The present invention relates to a device for detecting and notifying a departure from a range and for giving a warning in response to a call from a warning display device.

Conventionally, for example, Japanese Patent Laid-Open No. 6-274773 and Japanese Patent Laid-Open No. 2003-196863 have been proposed as devices for detecting and notifying the departure from the viewing range. Japanese Patent Application Laid-Open No. Hei 6-274773 receives an electromagnetic wave transmitted from an electromagnetic wave transmitter with an electromagnetic wave receiver, detects that the reception level is below a reference value, and issues an alarm. On the other hand, Japanese Patent Laid-Open No. 2003-196663 discloses a warning on the owner's side when a coded radio wave intermittently emitted from a transmitter on the carry-on side is received by the receiver on the owner's side and the reception intensity falls below a set value. In addition to actuating the means, a radio wave is emitted from the owner-side transmitter, the radio wave is received by the carry-item receiver, and if the codes match, the carry-item-side alarm device is activated.

Problems the invention is trying to solve

However, in the apparatus disclosed in Japanese Patent Laid-Open No. 6-274773, if there are other electromagnetic wave transmitters within the reach of the electromagnetic wave transmitted from one electromagnetic wave transmitter, the electromagnetic wave is transmitted from those electromagnetic wave transmitters. The intensity of the electromagnetic wave synthesized by the interference of the generated electromagnetic waves with each other is remarkably changed, so that a predetermined alarm operation is impaired, causing malfunction and malfunction.

For this reason, this kind of device is especially suitable for kindergarten and nursery school children and patients for the purpose of preventing children from getting lost during walks and excursions in kindergartens and nursery schools, or for the purpose of preventing dementia patients from falling out of the care facility. Even if an electromagnetic wave transmitter is carried around, there is a problem that a reliable alarm is not obtained and it is not suitable for use.

In addition, since each electromagnetic wave receiver does not have a means for identifying each electromagnetic wave transmitter, it is impossible to recognize which electromagnetic wave transmitter has been emitted even if an alarm is issued, so the carrier who is the target of the alarm is specified. There was a problem that it was not possible to search quickly and accurately because it was not possible.

Furthermore, if all children or patients carry an electromagnetic wave transmitter, the leader or caregiver will need the same number of electromagnetic wave receivers, which makes the device not only large but also expensive and for this type of application. There was a problem that it was not suitable.

On the other hand, in the device disclosed in Japanese Patent Application Laid-Open No. 2003-196663, radio waves emitted from the carry-side transmitter are intermittent, so that power consumption is reduced and mutual interference of the electromagnetic waves is reduced. However, since the transmitters on the side of the carry items among a plurality of carry items emit independently encoded radio waves without any information exchange with each other, mutual interference still occurs and is similar to the above-mentioned JP-A-6-274773. There was a problem that stable operation could not be obtained.

In addition, it has been improved to be able to identify and recognize the carry-on transmitter that caused the alarm when the alarm occurred by coding, but if the interference occurs, the receiver on the owner side However, there is a problem that alarm reception and code determination cannot be performed normally and malfunction or malfunction occurs because the reception intensity of the signal received by the receiver changes significantly or the code is deformed.

Further, as in the case of the above-mentioned JP-A-6-274773, there is a problem that the apparatus used by the leader or caregiver becomes large and expensive when the number of children and patients to be used is large.

The present invention has been made in view of such problems, and the first object of the present invention is to cause mutual interference of radio waves in principle when a large number of persons are present as in the device disclosed above. The second purpose is to realize a stable and reliable alarm operation by eliminating the inconvenience that occurs, and the second purpose is to provide a large number of devices carried by the leader or caregiver with a single control display. It is an object of the present invention to provide a small and inexpensive separation detector that can identify portable devices.

Means for solving the problem

In order to achieve the above object, the present invention according to claim 1 is characterized in that at least one or a plurality of different call codes that can be distinguished from each other are generated sequentially and repeatedly. And a call signal transmitter that emits a radio wave of a call signal modulated by the output of the call code generator toward the portable device, and the portable device to which each call code is assigned immediately after each call signal is emitted. A response signal receiver for receiving the response signal, a response signal detector for detecting the response signal included in the output of the response signal receiver, and a sound or vibration when the response signal detector cannot detect the response signal An alarm table for notifying the user by an alarm device using the alarm and displaying a call code of the portable device corresponding to the response signal for which the response signal could not be detected or a unique name defined separately A control display device, a call signal receiver for receiving radio waves of the call signal, and a call code detection for detecting a call code assigned to itself included in the output of the call signal receiver and sending the output And at least one portable device comprising a response signal transmitter for emitting a radio wave of a response signal according to the output of the call code detector, or a plurality of portable devices to which different call codes are assigned. It is characterized by having.

According to a second aspect of the present invention, in the departure detector according to the first aspect, in the control indicator, the call code generator can be selectively added to any one of the individual call codes. Means for generating an additional code, and in a portable device, the call code detector detects a call code assigned to itself and outputs a call alarm output when the additional code is detected; and the call alarm It is characterized by comprising a call alarm device that starts by output and alerts the vehicle operator using sound or vibration.

According to a third aspect of the present invention, in the departure detector according to the first aspect, the control display device includes means for operating the response signal receiver only during the response signal reception period.

Embodiments of the invention and effects of the invention

The withdrawal detector according to claim 1 configured as described above includes a control display device used by an inducer or a caregiver (hereinafter referred to as a viewer) and at least one or more kindergarten or dementia patients. It is composed of a portable device carried by a person (hereinafter referred to as “carryer”). The control display may be carried when the viewer moves, or may be fixed at a location convenient for the viewer in other cases.

In the device according to the present invention, first, the control display device transmits, to the portable device, radio waves of a paging signal in which a paging code unique to each portable device is assigned at intervals set appropriately.

Next, each portable device sequentially receives a call signal transmitted intermittently from the control display, detects a call code assigned to each call signal, and the call code is assigned to the call code assigned to itself. Only when they match, the radio wave of the response signal is emitted toward the control display.

Subsequently, the control display device receives a response signal from the portable device having the matching call code for an appropriate period from immediately after each call signal is emitted to when the next call signal is emitted. If the response signal cannot be received, it is assumed that the portable device that should have emitted the response signal has left the viewing range or the battery has run out, and an alarm sound is generated or the vibrator is vibrated and the portable device is vibrated. Inform the viewer of the machine number or name.

As described above, in the device of the present invention, the emission order of radio waves from the control display device and the portable device is such that the control display device first emits a call signal, and then the portable device corresponding to the call signal outputs a response signal. By launching, the control display device makes an alarm judgment for one portable device. When the alarm determination is completed, the control display device emits a calling signal to the next portable device and performs a series of alarm determination operations for the next portable device in the same manner as the previous time. In this way, the alarm determination operation is repeated until the alarm determination operation is sequentially completed for all portable devices. After the alarm determination operation is completed for all portable devices, the same operation is repeated again from the first portable device. Since the device of the present invention operates in this way, the radio wave emitted by the device of the present invention is always from one of the control display device and the portable device, and in principle, radio interference occurs between the devices in the device. There is no. Therefore, according to the present invention, it is possible to accurately determine whether to leave without being disturbed by radio wave interference when viewing a large number of portable devices, and to identify each portable device. A high-reliability separation detector is provided that overcomes the drawbacks of radio wave interference of known ones.

In addition, since one control display device transmits and receives signals to and from all portable devices to detect separation, it has the effect that a small and inexpensive separation detector can be realized as easily as a cellular phone. In the case of viewing a large number of portable devices as known in the art, it has become possible to overcome the disadvantage that the viewer-side device becomes large and expensive, and to provide a convenient disconnection detection device.

According to the second aspect of the present invention, in the departure detector according to the first aspect, the observer wants to call the specific carryer specially or the specific carryer has left the portable device somewhere. When it is desired to search for the portable device, an additional code consisting of at least one bit for special calling is added to the call code assigned to the portable device to the control display device, and a call signal is constructed and emitted. Each portable device receives the call signal, detects the call code and the additional code, and when the call code is assigned to itself, transmits a response signal to the control display device and also detects the additional code. A call alarm emits sound and vibration to notify that there is a special call.

Therefore, the person carrying the portable device can know that there is a special call and can respond to the call promptly. On the other hand, when searching for a portable device that is left in an inconspicuous place such as a drawer, there is an excellent effect that it can be easily searched because the sound is emitted from the portable device. As described above, the device of the present invention provides the convenience that it is convenient for calling and searching, as well as for watching the departure.

Embodiments to which the present invention is applied will be described below with reference to the drawings. Needless to say, the present invention can take various forms as long as they are within the technical scope of the present invention without being limited to the following examples.

FIG. 1 is a block diagram showing the configuration of the apparatus of the present invention. FIG. 2 is a block diagram showing the configuration of the control display of the device of the present invention. FIG. 3 is a block diagram showing the configuration of the portable device of the device of the present invention. FIG. 4A is an explanatory diagram for explaining the firing timing of the call signal group emitted by the control display. FIG. 4B is an explanatory diagram for explaining the firing timing of the call signal included in the call signal group. FIG. 4C is an explanatory diagram for explaining the timing of emission and reception of the response signal emitted by the portable device and received by the control display device. FIG. 5 is an explanatory diagram for explaining the configuration of the call signal and the configuration and operation of the call signal detector of the portable device.

As shown in FIG. 1, the device of the present invention is a control display in which a normal viewer carries a call signal to the portable devices M1 31 to Mn 33 and receives a response signal emitted by the portable device. It is composed of one or more portable devices M1 31 to Mn33 that receive the call signal and the call signal when the call signal is addressed to the device 2 and emit a response signal toward the control display 2. .

As shown in FIG. 2, the control indicator 2 of the apparatus of the present invention shown in FIG. 1 includes a call code and additional code generator 21 for generating code information, that is, a call code and an additional code, which the call signal has, A call signal transmitter 22 which modulates the output of the call code and the additional code generator and emits a radio wave of the call signal; a response signal receiver 23 which receives a response signal from the portable device; and the response signal receiver Is not detected at the time of calling a specific portable device, a response signal detector 24 that sends the output to the disconnection alarm indicator 25 to start an alarm operation, and the alarm signal is sent from the response signal detector. It is composed of a detachment warning indicator 25 that sometimes generates sound and vibration with a buzzer and a vibrator to notify a viewer and displays the specific calling code on a liquid crystal display. The call code displayed on the liquid crystal display may be a name associated with the call code.

In such a configuration, the control and calculation functions that are part of the paging code and additional code generator 21, the response signal detector 24, and the alarm indicator 25 are preferably combined together in the current technology into one ultra-small microprocessor or Realized using a microcontroller. The call signal transmitter 22 emits a weak radio wave of 300 MHz band ON-OFF Key modulation. The paging signal transmitter can be manufactured by a technique that has been disclosed to the general public as long as it is an engineer belonging to the relevant field, and the frequency, transmission output, or modulation for the purpose of, for example, expanding the viewing range or effectively using the possessed technology. There is no problem even if the method is appropriately selected, and such a case is also included in the technical scope of the present invention. The number of bits of the call code included in the call signal may be determined so that at least all the portable devices accommodated by the device of the present invention can be identified, but the number of bits is set to increase the reliability with which each portable device detects the call signal. The call code may be repeatedly transmitted a plurality of times. Note that the number of mobile devices that are normally accommodated is 20 to 30. The response signal receiver 23 receives the 300 MHz band ON-OFF Key modulated weak radio wave emitted by the portable devices 31 to 33 shown in FIG. 1 as a response signal, and transmits a detection output. The response signal receiver can also be manufactured by a conventionally disclosed technique if it is an engineer belonging to the relevant field, or the reception signal and modulation method can be appropriately selected according to the portable devices 31 to 33. Needless to say, this case is included in the technical scope of the present invention.

As shown in FIG. 3, the portable devices 31 to 33 of the device of the present invention shown in FIG. 1 include a call signal receiver 311 that receives a call signal emitted by the control display device 2, and an output of the call signal receiver. The call code assigned to the self and the additional code for special call included in the output are detected, and when only the call code is detected, the output is sent to the response signal transmitter 313. When both the call code and the additional code are detected, the call signal detector 312 sends an output to the call alarm device 314, and when the output is transmitted from the call signal detector, the control indicator 2 A response signal transmitter 313 that emits a response signal, and a buzzer and a vibrator or an LED display emit sound and vibration or light when an output is transmitted from the call signal detector 312, and And a, a call alarm 314 to inform the. Here, the portable devices 31 to 33 are manufactured in the same manner except that the call codes are assigned so as not to overlap each other.

In such a configuration, the call signal receiver 311 receives the weak radio wave of the 300 MHz band ON-OFF Key modulation emitted by the call signal transmitter 21 and transmits the detection output. The paging signal receiver can also be manufactured by a conventionally disclosed technique if it is an engineer belonging to the relevant field, or it can be selected by appropriately selecting a receiving frequency and a modulation method according to the paging signal transmitter 21. Needless to say, this case is included in the technical scope of the present invention. The response signal transmitter 313 also emits a weak radio wave of 300 MHz band ON-OFF Key modulation as described above. The response signal transmitter can also be manufactured by a technique that has been disclosed to the general public as long as it is an engineer belonging to the field, and the frequency, transmission output, or modulation for the purpose of, for example, expanding the viewing range or effectively using the possessed technology. It goes without saying that there is no problem even if the method is appropriately selected, and that case is also included in the technical scope of the present invention. The paging signal detector 312 is also preferably implemented using a microprocessor or microcontroller.

As shown in FIG. 5, the call signal detector quantizes the detection outputs e, f, g,..., X, z received and transmitted by the call signal receiver 311 and sequentially stores them for each bit. A register 3121, a memory 3122 for storing call codes E, F, G,..., X assigned to itself, a memory 3123 for storing an additional code Z, and storage contents e, f, g of the register 3121 ,..., X and the memory contents E, F, G,..., X stored in the memory 3122 are subjected to a logical operation and the memory contents 3123 of the register 3121 and the additional code are stored. Logical operation means 3 for performing a logical operation to find a match with the stored content Z and sending an output to the response signal transmitter 313 when the call code matches, but also sending an output to the call alarm device 314 when the additional code also matches. 24 is more configurations. Here, it is common to add a start bit or the like to the calling code so that the processing of the calling code and the additional code detector 312 is easy, but this is well known to those skilled in the art. Therefore, it is omitted for ease of explanation. Further, each of e, f, g, x, z, E, F, G, X or Z means a binary number, that is, 1 or 0.
The additional code only needs to have at least one bit, but the number of bits may be increased as needed for the purpose of increasing the reliability of the response signal or increasing the type of information transmission from the viewer to the carrier. .

Next, the operation of the embodiment configured as described above will be described with reference to FIGS. 4 (A) and 4 (B), FIG. 4 (C) and FIG.
In this embodiment, as shown in FIG. 4B, the control display device 2 sequentially emits a series of calling signals R1 to Rn toward the portable devices 31 to 33. Here, for convenience of explanation, the series of call signals are collectively referred to as a call signal group. The call code and additional code generator 21 sets the interval between call signals so that the series of call signals do not overlap with the response signals A1 to An shown in FIG. 4C emitted by each portable device. It is set larger than at least (length of one call signal + 1 length of one response signal). One call signal group does not need to be composed of only one call signal R1 to call signal Rn, and a plurality of call signals may be formed as necessary to increase the reliability of call signal detection of each portable device. Also good.

As shown in FIG. 4A, the call code and additional code generator 21 is called an interval between one call signal group RG1 and the next signal group RG2, and an interval between the signal group RG2 and the next signal group RG3. As described above, the calling code and the additional code are generated so that the intervals between the signal groups are appropriately spaced, and the frequency of radio wave emission of the control display device 2 and the portable devices 31 to 33 is suppressed as much as possible to reduce the power consumption. This extends the battery life. The interval is normally set to 1 to 2 seconds, but may be shortened or extended depending on the urgency level of the departure detection.

As described above, when each portable device, that is, the portable devices 31 to 33 receives the call signal R1 to the call signal Rn shown in FIG. 4B and detects the call signal that matches the call code of itself. The response signal emitted from each portable device is assigned to the portable device as shown in FIG. 4 (C). When the call code R1 is detected, the response signal A1 is emitted. Similarly, when the portable device M2 32 call code R2 is detected, the response signal A2 is emitted. ... Finally, when the portable device Mn 33 call code Rn is detected, a response signal An is emitted. Thus, the operation proceeds and the separation detection and notification operation for one call signal group is completed. As is apparent from the above description, each call signal and the response signal are emitted without overlapping and do not interfere with each other.

As shown in FIGS. 4 (A) and 4 (C), each response signal is fired only for a certain period immediately after each call signal, so that the call signal transmitter 22 and the response signal transmitter 313 are operated for the certain period. As a result, the control display device 2 and the portable devices 31 to 33 can further save power. Since the technology can be easily conceived by an engineer belonging to the technical field, description thereof is omitted.

It is a block diagram which shows the structure of this invention apparatus. It is a block diagram which shows the structure of the control display machine of this invention apparatus. It is a block diagram which shows the structure of the portable device of this invention apparatus. It is explanatory drawing for demonstrating the timing of the calling signal group of this invention apparatus, a calling signal, and a response signal. It is explanatory drawing for demonstrating the structure of a call signal of this invention apparatus, the structure of a call signal detector, and operation | movement.

Explanation of symbols

2 ... Control display device 21 of the embodiment ... Call and additional code generator 22 ... Call signal transmitter 23 ... Response signal receiver 24 ... Response signal detector 25 ... Alarm display Machines 31, 32, 33... Portable device 311... Call signal receiver 312 .. call signal detector 313... Response signal transmitter 314. 3122 ... Call code memory 3123 ... Additional code memory 3124 ... Logic operation means RG1, RG2, RG3, RGp ... Call signal groups R1, R2, R3, Rn ... Call signals A1, A2, A3, An ... Response signals e, f, g, x, z ... Stored contents E, F, G, X in register 3121 ... Stored contents in call code memory 3122 ... Additional code memory 3123 Memory contents of

Claims (3)

A call code generator for sequentially and repeatedly generating at least one or a plurality of different and distinguishable call codes, and a call signal modulated by the output of the call code generator to a portable device Included in the output of the response signal receiver for receiving the response signal from the portable device to which the individual call code is assigned immediately after emitting the individual call signal When the response signal detector detects the response signal and the response signal detector cannot detect the response signal, an alarm using a sound or vibration is given to the user and the response signal cannot be detected. A control indicator having an alarm indicator for displaying a call code of the portable device corresponding to the received response signal or a unique name defined separately, and a call for receiving radio waves of the call signal A signal receiver, a call code detector for detecting a call code assigned to itself included in the output of the call signal receiver and transmitting the output, and a response signal for emitting a radio wave of a response signal by the output of the call code detector A departure detector comprising: at least one portable device including a transmitter or a plurality of portable devices to which different call codes are assigned. 2. The disconnection detector according to claim 1, wherein the control display device includes means for generating an additional code that can be selectively added by a user to any one of the individual call codes. In this machine, the call code detector detects the call code assigned to itself and sends out a call alarm output when the additional code is detected, and a sound, vibration or LED display is started by the call alarm output. And a call alarm device for alerting a person carrying the vehicle using a device or the like. 2. The separation detector according to claim 1, wherein the control display device includes means for operating the response signal receiver only during a response signal reception period.

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