JP2010256991A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change an intercom to an alarm mode in a timing when a resident goes out without waiting for the count-up of a timer since the resident sets crime prevention until the intercom is shifted to an alarm mode. <P>SOLUTION: A resident carries a portable transmitter/receiver 3 which emits a prescribed radio wave. A front door slave unit 1 includes a slave unit RF circuit for communicating with the portable transmitter/receiver 3, and a living room master unit 2 includes a master unit RF circuit for communicating with the portable transmitter/receiver 3, and the master unit CPU of the living room master 2 is configured to, when the change of radio wave intensity received by the slave unit RF circuit and the maser unit RF circuit satisfies prescribed conditions, determine whether or not the resident has gone out of his or her residence, and to change an intercom to an alarm mode. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an interphone system in which a security sensor is connected to an interphone for a visitor to call a resident and make a call.

When intercom is used when a visitor calls a resident and makes a call, a sensor that detects the opening of a dwelling unit's window or door or a human body detection sensor that detects the presence of a person is connected. There is an intercom system configured to issue an alarm when an abnormality such as an intrusion of a suspicious person is detected (see, for example, Patent Document 1).
In the case of such an intercom system, when shifting to a warning mode in which the alarm notification function is active, it is necessary to wait for the resident to go out of the dwelling after the transition operation. It was set and shifted to the alert mode. And the resident who went out after setting alert was confirming with the entrance cordless handset that it shifted to alert mode.

Japanese Patent Laid-Open No. 10-134286 JP 2007-96718 A

  Thus, since the intercom system provided with the conventional crime prevention sensor required time to set alert and the operation was troublesome, the present applicant proposed the interphone system shown in Patent Document 2. In patent document 2, it was made possible to shift to the alert mode without waiting for the elapse of a fixed time by operating the entrance cordless handset, thereby eliminating the waiting time.

However, in the case of the technique disclosed in Patent Document 2, there is no need to wait until the timer counts up. However, it is necessary to operate the entrance unit, and the entrance unit can be operated by an unspecified person. There were concerns about security problems.
Therefore, in view of such a problem, the present invention does not wait for the timer to count up until the resident enters the security mode after the crime prevention setting by the occupant parent machine, and at the timing when the resident goes out, It is an object of the present invention to provide an intercom system that does not require a separate operation for shifting to, and terminating timer counting.

In order to solve the above-mentioned problem, the invention of claim 1 is an interphone having an entrance cordless handset for a visitor to call a resident and make a call, and a room base phone for answering a call from the entrance cordless handset. And an intercom is an intercom system having an alarm notification function that activates an alarm when the abnormality detection means detects an abnormality. Is equipped with a portable transmitter / receiver that emits a predetermined radio wave, and the front handset has a handset wireless communication means that communicates with the portable transmitter / receiver, and a handset radio field strength that measures the radio field intensity received from the portable transmitter / receiver. The intercom further includes an outing determination unit that determines that the portable transceiver has gone out of the dwelling when the change in the measurement value of the handset radio wave intensity measurement unit satisfies a certain condition. Means, portable transceivers if it is determined to have moved out into the dwelling out, characterized in that shifting the alarm onset report function to alert mode to active.
According to this configuration, it is possible to detect when the portable transceiver approaches the entrance slave unit and then moves away, i.e., the occupant carrying the portable transceiver can exit the entrance and detect the state of going out. The intercom can be shifted to the alert mode by judging the resident's going out from the change. Therefore, the resident does not need to wait for the timer to be counted up or operate the entrance cordless handset to shift to the warning mode, and can shift to the warning mode without performing any troublesome operations. In addition, it is not necessary to provide an operation unit for shifting the entrance cordless handset to the warning mode, which is preferable in terms of crime prevention.

According to a second aspect of the present invention, in the configuration according to the first aspect, the outing determining means determines that the portable transceiver has gone out of the dwelling when the measured value of the slave unit radio wave intensity measuring means decreases and then decreases by a predetermined amount. It is characterized by that.
According to this configuration, it is possible to reliably determine that the resident moves away after approaching the entrance cordless handset.

According to a third aspect of the present invention, in the configuration of the first aspect, the living room base unit is a base unit wireless communication means for communicating with the portable transceiver, and a parent unit radio field intensity measurement for measuring the radio field intensity received from the portable transceiver. And the outing determination means determines that the portable transceiver has gone out of the dwelling unit when a change in measured values of the slave unit radio field intensity measurement unit and the master unit radio field intensity measurement unit satisfies a certain condition. And
According to this configuration, it is possible to detect a state in which the resident moves from the inside of the dwelling unit to the outside of the dwelling unit, then approaches the entrance cordless handset and moves further away. Therefore, the resident's going out can be determined with high accuracy.

According to a fourth aspect of the present invention, in the invention according to the third aspect, the outing determining means is configured such that the measured value of the slave unit radio field intensity measuring unit is in a state where the measured value of the master unit radio field intensity measuring unit is below a predetermined value. After rising, when a predetermined amount falls, it is determined that the portable transceiver has gone out of the dwelling unit.
According to this configuration, it is possible to reliably determine that the resident leaves the dwelling unit, approaches the entrance cordless handset, and then moves away. Therefore, even if a resident who has come out of the dwelling unit to return to the dwelling unit may return to the dwelling unit, it can be detected and no erroneous determination is made.

According to a fifth aspect of the present invention, in the configuration according to any one of the first to fourth aspects, the living room base unit receives a warning setting button for activating an alarm notification function and a warning setting button operation, and a predetermined time has elapsed. And a timer for making a transition to the warning mode later, and the outing determination means, if it is determined that the portable transmitter / receiver has moved out of the dwelling unit until the fixed time has elapsed after the warning setting button is operated It is characterized by making it transfer to alert mode, without waiting for progress.
According to this configuration, even if the radio wave transmitted from the portable transceiver cannot be used to shift to the alert mode, the resident can be relieved because the mode automatically shifts to the alert mode after a certain time has elapsed. Moreover, since the outing determination means carries out the determination by setting the alert, it is safe without shifting to the alert mode without the resident knowing.

According to a sixth aspect of the present invention, in the configuration according to the fifth aspect, the room master has a portable transceiver activation means for activating the portable transceiver, and the portable transceiver activation means is operated by a warning setting button. Then, a starting signal is transmitted from the base unit wireless communication means, and the portable transceiver is started to start transmitting a predetermined radio wave.
According to this configuration, the portable transmitter / receiver starts transmitting a predetermined radio wave by the operation of the warning setting button, so that the internal battery can be saved.

According to a seventh aspect of the present invention, in the configuration according to any one of the first to sixth aspects, the predetermined radio wave transmitted by the portable transceiver includes its own ID information, while the entrance unit has received from the portable transceiver. The radio wave has ID recognition means for recognizing an ID, and the outing determination means does not make a determination of going out unless the ID recognition means recognizes the ID.
According to this configuration, if the received radio wave does not include ID information, the presence of the portable transceiver is not determined, so that no malfunction occurs.

The invention according to claim 8 is the configuration according to any one of claims 1 to 7, wherein the outing determination means performs an answer signal for notifying the portable transmitter / receiver of the completion of the alert mode transition after the transition to the alert mode. Is transmitted from the slave unit wireless communication means, and the portable transceiver has notification means for notifying that the interphone has shifted to the alert mode, and notification control means for notifying the notification means upon receiving an answer signal. And
According to this configuration, when the intercom shifts to the warning mode, the portable transceiver notifies the user, so that the resident can confirm the shift to the warning mode and can be relieved.

  According to the present invention, it is not necessary to wait for the timer to be counted up or to operate the entrance cordless handset to shift to the warning mode because it detects the resident's going out and shifts to the warning mode. Therefore, the resident can shift to the warning mode without performing a troublesome operation. In addition, it is not necessary to provide an operation unit for shifting the entrance cordless handset to the warning mode, which is preferable in terms of crime prevention.

It is a block diagram which shows an example of the intercom system which concerns on this invention. It is a circuit block diagram of an entrance child machine. It is a circuit block diagram of an office master. It is a circuit block diagram of a portable transceiver. It is explanatory drawing of the control which transfers to warning mode, (a) is a change of a resident's place, (b) is a change of the radio field intensity which a living room main machine receives from a portable transceiver, (c) is an entrance cordless handset. The change of the radio field intensity received from the portable transceiver is shown.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of an intercom system according to the present invention. 1 is an entrance cordless handset installed at the entrance for a visitor to call a resident and talk, and 2 is a call from the entrance cordless handset 1. 3 is a portable transceiver that emits a predetermined radio wave and communicates with the front cordless handset 1 and the living room base unit 2. 4 is installed in a window or the like for opening operation, etc. A security sensor 5 detects an electrical lock, 5 is an electric lock installed at the entrance door, and 6 is an alarm device that issues an alarm when an abnormality occurs.
The entrance cordless handset 1 is connected to the living room master unit 2 via a transmission line L1, and the security sensor 4, the electric lock 5 and the alarm device 6 are connected to the living room master unit 2 via transmission lines L2 to L4, respectively.

  FIG. 2 shows a circuit block diagram of the entrance cordless handset 1. As shown in FIG. 2, the entrance cordless handset 1 includes a camera 10 that images a visitor, a video processing unit 11 that performs video signal modulation processing and the like, and an antenna 12 for communicating with the portable transceiver 3. RF circuit 13, call button 14 for calling a resident, call circuit 15 provided with microphone 15 a and speaker 15 b, storage unit 16 for storing ID information of portable transceiver 3, slave unit CPU 17 for controlling the entire entrance slave unit 1 And a slave unit interface (slave unit IF) 18 for communicating with the living room master unit 2.

  FIG. 3 shows a circuit block diagram of the living room master unit 2. As shown in FIG. 3, the living room master unit 2 includes a display unit 21 that displays a captured image of the camera 10, a video processing unit 22 that performs a demodulation process of a video signal transmitted from the entrance unit 1, and an entrance unit. A call button 23 that responds to a call from 1, a warning setting button 24 that shifts to a warning mode that activates a warning function, a timer 25 that counts for a certain time in response to the operation of the warning setting button 24, a mobile phone The main unit RF circuit 27 having an antenna 26 for communicating with the transceiver 3, the call circuit 28 having a microphone 28 a and a speaker 28 b, the main unit CPU 29 for controlling the living room main unit 2 as a whole, and communicating with the entrance terminal 1. In addition, a base unit interface (base unit IF) 30 for communicating with the abnormality detection means such as the security sensor 4 and the electric lock 5 is provided.

  FIG. 4 shows a circuit block diagram of the portable transceiver 3. As shown in FIG. 4, the portable transmitter / receiver 3 emits and displays a communication state with the RF circuit 33 including the antenna 32 for communicating with the front door unit 1 and the room base unit 2, the front door unit 1 and the like. It includes an LED 34, a buzzer 35 for reporting sound notifications, a transceiver CPU 36 for controlling the entire portable transceiver 3 and a battery 37 as an operating power source.

The operation of the intercom system configured as described above, in particular, the operation based on the communication between the portable transceiver 3 and the entrance slave unit 1 and the room master unit 2 will be specifically described below. The description of the basic operation as an intercom that calls and responds is omitted.
When the caution setting button 24 is pressed by a resident or the like, the front cordless handset 1 and the room base unit 2 constituting the interphone start shifting to the caution mode. Specifically, under the control of the master CPU 29, the timer 25 starts counting a set time such as 100 seconds, for example. When the timer 25 counts up, it shifts to a warning mode.

Further, in response to the operation of the alert setting button 24, the base unit CPU 29 activates the base unit RF circuit 27 to cause the portable transceiver 3 to transmit an activation signal from the antenna 26. This activation signal is received by the RF circuit 33 via the antenna 32 of the portable transceiver 3, and when the transceiver CPU 36 recognizes the reception of the activation signal, the RF circuit 33 starts transmitting a predetermined high-frequency signal. At this time, the RF circuit 33 starts transmission of a high-frequency signal including its own ID information set in advance, and intermittent transmission is performed in which a signal is transmitted from the antenna 32 for 0.1 seconds at intervals of 0.5 seconds, for example. The Furthermore, in response to the operation of the alert setting button 24, the master CPU 29 starts measurement of radio wave intensity, which will be described later.
In this manner, the portable transceiver 3 is turned on by the operation of the alert setting button 24 and starts transmitting a predetermined radio wave, so that it is not necessary to always transmit and the internal battery can be saved.

  The portable transmitter / receiver 3 has a power switch (not shown). When the power switch is turned on, the portable transmitter / receiver 3 enters a standby state for a startup signal. When the startup signal is received from the room master unit 2 in this state, transmission of a high-frequency signal is started. . In addition, amplitude communication, frequency modulation, phase modulation, and a combination thereof can be used for communication between the living room master unit 2 and the portable transceiver 3 and communication between the entrance slave unit 1 and the portable transceiver 3.

When the resident carries the portable transmitter / receiver 3 that has started the transmission of the high-frequency signal in this way, moves away from the parent room 2 toward the entrance, and further goes out of the entrance, the interphone operates as follows. While the resident moves, the radio wave transmitted from the portable transceiver 3 is received by the base unit RF circuit 27 and the base unit RF circuit 13, and the radio wave information (received power) information received by the base unit RF circuit 27 is The radio wave intensity (reception power) information transmitted to the master CPU 29 and received by the slave RF circuit 13 is sent to the slave CPU 17.
FIG. 5 is an explanatory diagram modeling changes in radio field intensity received by the living room master unit 2 and the entrance unit 1 as described above, and (a) shows changes in the location of the occupant carrying the portable transceiver 3, (B) shows a change in the radio wave received from the portable transceiver 3 by the living room master unit 2, and (c) shows a change in the radio wave received by the front cordless handset 1 from the portable transceiver 3. [E1] indicates a dwelling unit area, [E2] indicates an area between the entrance and the entrance cordless handset 1 installed at the fence, and [E3] indicates an area outside the fence.

  As shown in FIG. 5, as the resident carrying the portable transceiver 3 moves away from the room master unit 2, the radio field intensity received by the room base unit 2 decreases and changes from the [E1] area to the [E2] area. As the process proceeds, the value falls below a preset threshold value. At the same time, since the resident approaches the entrance cordless handset 1, the radio field intensity received by the entrance cordless handset 1 increases. Then, it approaches the entrance cordless handset 1 on the way from the [E2] area to the [E3] area, and the received radio wave intensity of the entrance cordless handset 1 becomes the maximum value. After that, when proceeding to the [E3] area, the received radio wave intensity of the front door device 1 decreases because it leaves the front door device 1.

The master CPU 29 that has acquired the radio field intensity information from the master RF circuit 27 compares it with a preset threshold value T1 (for example, -90 dBm). On the other hand, the slave CPU 17 that has obtained the radio field intensity signal from the slave RF circuit 13 transmits this information to the room master 2. The base unit CPU 29 compares the radio field intensity received from the entrance cordless handset 1 in time series, determines the maximum value, and then detects a point that is decreased and then decreased from the maximum value by a certain level (for example, 3 dB).
However, the slave unit CPU 17 reads the ID information included in the high frequency signal received by the slave unit RF circuit 13 from the portable transceiver 3 and determines whether or not it matches the ID stored in the storage unit 16. In this case, the received radio wave intensity information is not transmitted.

  In the state where the intensity of the radio wave received by the parent machine RF circuit 27 is below the threshold value T1, the parent machine CPU 29 decreases after the intensity of the radio wave received by the child machine RF circuit 13 takes a peak, and is constant from the maximum value. If the time point P at which the level decreases is detected, it is determined that the user has gone out.

The master CPU 29, which has determined that the resident has gone out, stops the counting timer 25, and when the abnormality detection means such as the security sensor 4 or the electric lock 5 detects an abnormality, the interphone performs a warning operation. The machine 1, the living room master 2, and the alarm device 6 are shifted to a warning mode in which an alarm sound is emitted. Then, a warning mode transition completion signal is transmitted to the entrance cordless handset 1.
Upon reception of the warning mode transition completion signal, the entrance slave unit 1 transmits an answer signal for notifying the portable transceiver 3 of the completion of the warning mode transition from the slave unit RF circuit 13 under the control of the slave unit CPU 17. .

The portable transmitter / receiver 3 that has received this answer signal controls the transmitter / receiver CPU 36 so that the LED 34 emits light and the buzzer 35 reports a notification sound to notify the resident that the alarm mode has been entered. Furthermore, the transmission of the high frequency signal is stopped and the standby state is restored.
For example, if the security sensor 4 detects an abnormality in the intercom that is in the warning mode, the entrance cordless handset 1, the living room master 2, and further the alarm device 6 emit an alarm sound to threaten the intruder and Notify that an error has occurred.

In this manner, the position of the portable transceiver 3, that is, the position of the resident carrying the portable transceiver 3 is detected, and when the resident leaves the dwelling unit and leaves the entrance cordless handset 1, the warning mode is automatically entered. Since the transition is made, there is no need for the resident to wait for the timer 25 to count up or to operate the entrance cordless handset 1 to shift to the alert mode. Therefore, the resident can shift to the warning mode without performing a troublesome operation, and it is not necessary to provide an operation unit for shifting to the warning mode in the entrance cordless handset 1, which is preferable in terms of crime prevention.
In addition, since the resident moves from the inside of the dwelling to the outside of the dwelling, then approaches the entrance cordless handset 1 and further moves away, the resident who has come out of the entrance may return to the dwelling unit again. It is not determined that the user has gone out, and malfunction can be prevented.

Furthermore, even if it is not possible to shift to the alert mode due to radio waves transmitted from the portable transceiver 3, it is safe because it automatically shifts to the alert mode after a certain period of time, and it is determined to go out by setting the alert. Since the resident starts, there is no need to shift to the warning mode without the knowledge of the resident.
Also, if the received radio wave does not contain the predetermined ID information, the presence of the portable transceiver is not determined, so that malfunction does not occur even when other devices that emit similar signals approach.
And if it transfers to warning mode, since the portable transmitter / receiver 3 alert | reports it, the resident can confirm the transfer to warning mode and can be relieved.

In the above embodiment, the strength of the radio wave emitted by the portable transceiver 3 is measured by both the entrance cordless handset 1 and the living room base unit 2, and it is determined whether the resident has gone out from the change in the radio wave strength of both. The resident's going out may be determined only by the change in the radio field intensity received by the entrance cordless handset 1. Conversely, it is also possible to determine whether the resident has gone out only by the change in the radio field intensity received by the room master unit 2.
On the other hand, when the radio field intensity emitted by the portable transceiver 3 is measured in both the front door unit 1 and the living room base unit 2 as in the above embodiment, the position of the resident can be determined relatively accurately. It is also possible to provide functions such as turning on lighting wherever you are or turning off lighting where you are not.
Further, although the master CPU 29 determines that the resident is out, the slave CPU 17 may be provided with a determination function. Further, although the portable transceiver 3 is turned on by operating the living room master unit 2, an activation button that activates the RF circuit 33 to start transmission of a predetermined radio wave may be provided in the portable transceiver 3 itself. In this case, since the portable transceiver 3 can be completely turned off, the life of the battery 37 can be extended.

  1 .. Entrance cordless handset 2.. Base room 3.. Portable transceiver 4.. Security sensor (abnormality detection means) 5.. Electric lock (abnormality detection means) 12.・ Slave unit RF circuit (slave unit wireless communication means, slave unit radio wave intensity measurement unit), 17 ..Storage unit, 17 ..Slave unit CPU (ID recognition unit), 24 ..Warning setting button, 25 ..Timer, 26 .. Antenna, 27 .. Base unit RF circuit (base unit wireless communication means, base unit radio wave intensity measurement means), 29 .. Base unit CPU (outing determination means, portable transceiver activation means), 32 .. Antenna, 33..RF circuit, 34..LED (notification means), 35..Buzzer (notification means), 36..Transceiver CPU (notification control means).

Claims (8)

An intercom having an entrance cordless handset for a visitor to call a resident and making a call, and a living room base phone for responding to a call from the entrance cordless handset, a security sensor connected to the living room base phone, etc. An intercom system including an alarm detection function that performs an alarm operation when the abnormality detection unit detects an abnormality.
A portable transceiver that can be carried by a resident and emits a predetermined radio wave is provided, and the entrance cordless handset measures the wireless radio communication means that communicates with the portable transceiver, and the radio wave intensity received from the portable transceiver. Have a handset radio wave intensity measuring means,
Furthermore, the intercom has an outing determination means for determining that the portable transceiver has gone out of a dwelling unit when a change in the measurement value of the handset radio wave intensity measurement means satisfies a certain condition,
If the said going-out determination means judges that the said portable transmitter / receiver went out of a dwelling unit, it will transfer to the alert mode in which the said alarm alert function becomes active, The intercom system characterized by the above-mentioned. 2. The intercom system according to claim 1, wherein the outing determination unit determines that the portable transceiver has gone out of the dwelling unit when the measured value of the handset radio wave intensity measurement unit increases and then decreases by a predetermined amount. The living room base unit includes a base unit wireless communication unit that communicates with the mobile transceiver, and a base unit radio field intensity measuring unit that measures a radio field intensity received from the mobile transceiver.
The outing determination means determines that the portable transceiver has gone out of a dwelling unit when a change in measured values of the slave unit radio field intensity measurement unit and the master unit radio field intensity measurement unit satisfies a certain condition. The intercom system according to claim 1. In the state where the measured value of the base unit radio wave intensity measuring unit is lower than a predetermined value, the portable transmitter / receiver is connected when the measured value of the slave unit radio field strength measuring unit rises and then decreases by a predetermined amount. 4. The intercom system according to claim 3, wherein the intercom system is determined to have gone out of a dwelling unit. The living room base unit has a warning setting button for activating the alarm notification function, and a timer for shifting to the warning mode after a certain period of time in response to the operation of the warning setting button,
The outing determination means determines that the mobile transceiver has gone out of the dwelling unit until the fixed time has elapsed after the warning setting button is operated, and the warning mode is not waited for the fixed time to elapse. The intercom system according to any one of claims 1 to 4, wherein the intercom system is moved to. The living room master has a portable transceiver activation means for activating the portable transceiver.
The portable transmitter / receiver starting means transmits an activation signal from the master wireless communication means when the warning setting button is operated, and activates the portable transceiver to start transmission of the predetermined radio wave. The intercom system according to claim 5. While the predetermined radio wave transmitted by the portable transceiver includes its own ID information, the entrance cordless handset includes ID recognition means for recognizing the ID by the radio wave received from the portable transceiver. The intercom system according to any one of claims 1 to 6, wherein the means does not make a determination of going out unless the ID recognition means recognizes the ID. The outing determination means, after carrying out the transition to the warning mode, causes the portable radio transceiver to transmit an answer signal for notifying the portable transceiver of the completion of the warning mode transition, and the portable transceiver 8. The apparatus according to claim 1, further comprising notification means for notifying that the intercom has shifted to the alert mode, and notification control means for receiving the answer signal and notifying the notification means. The listed intercom system.

Images