JP2006270853A - Wireless adaptive intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless adaptive intercom system capable of suppressing power consumption of an additional wireless master set by driving or stopping a device in response to a result of detection by a human body detection sensor, and obtaining thereby a call standby time longer than in a conventional system. <P>SOLUTION: A wireless adaptor 3 is not directly connected to a door intercom slave set 1, but connected by wire to a master set 2. The additional wireless master set 4 is provided with a human body detection sensor 4A, a wireless communication section 41 and a wireless communication control means 40A. The control means 40A discriminates a detection signal of the detection sensor 4A, and does not allow the communication section 41 to be driven if a human body is judged to be not present, and starts to drive the communication section 41 if the human body is judged to be present. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless compatible intercom system configured by connecting a door phone slave unit and an interphone master unit with a signal line, further connecting a wireless adapter to the interphone master unit, and adding a wireless extension master unit. Regarding improvement.

This type of wireless compatible intercom system is used in detached houses.
Patent Document 1 below discloses this type of wireless-compatible intercom system, which is connected to a TV interphone master unit in which a camera-equipped doorphone slave unit is connected by a two-wire signal line, and to this TV interphone master unit. The wireless adapter is composed of a wireless adapter and a wireless extension base unit that transmits and receives signals to and from the TV intercom base unit by transmitting and receiving wireless signals to and from the wireless adapter.
In this type of system, when the TV interphone main unit receives a call from the door phone with camera, it sends a call signal to the wireless adapter, and the wireless adapter that receives the call transmits the call signal as a wireless signal. By sending it to the extension base unit, if the person near the radio extension base unit inputs an operation to answer the call, the radio extension base unit of the TV intercom will also output the ringing tone and display the visitor video. .

By the way, in such a system, the wireless extension master unit performs wireless communication with the wireless adapter even during call waiting.
In other words, when waiting for a call, a confirmation request signal is intermittently transmitted from the wireless adapter, and if a reply signal is received from the wireless extension master unit, the wireless adapter transmits a signal necessary for communication with the wireless extension master unit. Communication conditions are established by performing transmission / reception, so that, when the wireless adapter receives a call signal from the TV interphone master unit, it can immediately send the call signal to the wireless extension master unit.
However, according to the above configuration, since the wireless extension base unit is generally driven by using a dry cell or the like as a power source, power is consumed even in wireless communication during call waiting, and a sufficiently long call waiting time can be obtained. There was no problem.

On the other hand, Patent Document 2 discloses an interphone display device including a transmission unit, a reception unit, and a television receiver. In the transmission unit, the transmission unit detects a camera that captures the entrance and the like, and detects whether a person stands at the entrance. A detection unit (human body detection sensor) for detecting a human being, and transmitting a detection signal informing the detection unit and a video signal from the camera to the receiving unit, and the power of the television receiver is turned off. The case is turned on to turn on.
Conventionally, in this type of system, the human body detection sensor has only been used to detect the presence or absence of a person such as a front door.
JP 2000-224316 A Japanese Patent Laid-Open No. 7-95559

  The present invention has been made in view of the above circumstances, and by controlling the driving and stopping of the device according to the detection of the human body detection sensor, the power consumption of the wireless extension base unit is suppressed, thereby A first object of the present invention is to provide a wireless compatible intercom system capable of obtaining a standby time longer than before.

In the wireless compatible intercom system, as described above, intermittent communication is performed between the wireless adapter and the interphone wireless extension base unit even when waiting for a call, but there are no people around the interphone wireless extension base unit. Is unlikely to respond to a call at the interphone wireless extension master unit, and therefore there is little need for intermittent communication during call waiting.
Therefore, the present invention is intended to determine the presence or absence of a person around such a wireless extension base unit using a human body detection sensor.
A second object is to perform intermittent communication with lower power in the wireless extension master unit by suppressing the power consumption of the wireless extension master unit using the human body detection sensor.

In order to achieve the first and second objects, the first and second aspects of the present invention connect a door phone slave unit and an interphone master unit with a signal line, and further include a wireless communication unit in the interphone master unit. A wireless compatible intercom system configured by connecting a wireless adapter and adding a wireless extension base unit has the following characteristics.
That is, in the wireless compatible intercom system according to claim 1 according to the first aspect of the present invention, the wireless adapter is not directly connected to the door phone slave unit but is wired to the interphone master unit, and the wireless extension master unit is A human body detection sensor, a wireless communication unit, and a wireless communication control unit. The wireless communication control unit determines the detection signal of the human body detection sensor and determines that the human body is absent. When it is determined that there is a human body without being driven, driving of the wireless communication unit is started.

  According to claim 2, which is the second aspect of the present invention, the wireless adapter is not connected to the door phone slave unit but wired to the master unit, and the wireless adapter includes a wireless communication unit, wireless adapter communication control means, The wireless extension base unit includes a first wireless communication unit, a second wireless communication unit for intermittent communication with lower power consumption, a human body detection sensor, and a wireless extension base unit communication control means. And. The wireless extension master communication control means discriminates the detection signal of the human body detection sensor and determines that the human body is not present when the first and second wireless communication units are not driven. Drive only the second wireless communication unit, and after that, during the period from the wireless adapter to receiving the call call signal based on the call signal from the master unit, the drive of only the second wireless communication unit is maintained. In addition, intermittent communication is performed with the wireless adapter, and after receiving a call calling signal from the wireless adapter in this state, the driving of the second wireless communication unit is stopped and the driving of the first wireless communication unit is stopped. By starting the communication, the wireless extension master unit performs communication processing with the wireless adapter through which the telephone can be communicated with the door phone slave unit or the interphone master unit.

  According to the first aspect of the present invention, the human body detection sensor is provided in the wireless extension master unit, the detection signal of the human body detection sensor is determined, and the wireless communication unit provided in the wireless extension machine is driven and stopped. Therefore, when it is determined that the human body is absent, the wireless communication unit is stopped so that intermittent communication or wireless communication by calling is not performed. On the other hand, when the presence of a human body is detected, the wireless communication is triggered. Since the drive of the unit is started, the power consumption of the wireless extension base unit can be suppressed. Therefore, the call waiting time of the wireless extension base unit can be made longer than before.

  In addition, in the second aspect of the present invention, in addition to the effects of the first invention, both the wireless adapter and the wireless extension base unit are intermittent with less power consumption than the first wireless communication unit. Since the second wireless communication unit for communication is provided, the power consumption of the wireless extension master unit can be further suppressed.

  Embodiments of the present invention will be described below. In this embodiment, an example applied to a wireless compatible TV intercom system is shown.

FIG. 1 is a diagram schematically showing an example of the basic configuration of the first inventive system.
The first invention system includes a TV interphone master unit 2, a doorphone slave unit with camera 1 connected to the TV interphone master unit 2, a wireless adapter 3, and a wireless extension parent that performs wireless communication with the wireless adapter 3. The machine 4 is comprised.
Here, the wireless adapter 3 is not directly connected to the camera-equipped doorphone slave unit 1, but is directly connected to the TV intercom base unit 2 through the signal line L.
The signal line L is composed of a two-wire balanced cable or the like, and a signal on which a system control signal including an audio signal, a video signal, and a paging signal is superimposed is transmitted.

In the first aspect of the present invention, each of the wireless adapter 3 and the wireless extension base unit 4 communicates with the communication control means 30A and 40A for performing wireless communication control, and wireless communication for performing wireless communication of control signals, audio signals, and video signals. Parts 31 and 41.
Further, the wireless extension base unit 4 is provided with a human body detection sensor 4A for detecting a human body, and as described later, the presence / absence of a human body is determined based on a detection signal detected thereby, and the wireless communication unit 41 is driven and stopped. Is switched. That is, when there is no person around the wireless extension base unit 4, it is determined that the possibility of using the wireless extension base unit 4 is low, and wireless communication is disabled.
In the figure, the human body detection sensor 4A is built in the wireless extension base unit 4. However, an external connector may be provided and externally attached.

Next, the calling operation from the camera-equipped doorphone slave unit 1 will be described.
If there is a call at the camera-equipped doorphone slave unit 1, the voltage value of the signal line L changes, so that the TV interphone base unit 2 detects this change and recognizes that the call has been received. Then, the television intercom base unit 2 performs a call operation such as a ringing tone output and sends a call signal to the wireless adapter 3. When the wireless adapter 3 receives the calling signal, it transmits the calling signal as a call calling signal in the form of a wireless signal to the wireless extension base unit 4. In the present invention, the call signal sent in the form of a radio signal from the wireless adapter 3 to the wireless extension master 4 at this time is called a call call signal and is distinguished from the call signal issued by the television interphone master 2.

  If there is a response at the TV interphone main unit 2 performing the calling operation, a communication path is formed with the camera doorphone sub unit 1 and communication is possible. If a resident is called by performing a call operation and there is a response, a communication path is formed between the wireless extension base unit 4 and the camera-equipped doorphone slave unit 1 and communication is possible. When a call operation is performed at 4, a communication path is formed between the first answering unit and the door phone 1 with camera.

In addition, when the camera-equipped doorphone slave unit 1 is on standby for calling, wireless communication between the wireless adapter 3 and the wireless extension base unit 4 is performed by intermittently transmitting and receiving wireless signals between the wireless adapter 3 and the wireless extension base unit 4. The condition is maintained.
The wireless adapter 3 and the wireless extension base unit 4 have both the wireless communication units 31 and 41 described above, so that both wireless communication by calling and intermittent communication during call waiting are executed.

FIG. 2 is a block diagram showing an example of the basic configuration of the first inventive system.
The intercom 1 with camera includes a signal processing unit 10, a speaker amplifier A1 that amplifies the level of the audio signal output to the speaker SP, a microphone amplifier A2 that amplifies the level of the audio signal input from the microphone MIC, the camera 11, A call button 12 is provided.
The television interphone master unit 2 includes a signal processing unit 20, a speaker amplifier A1 that amplifies the level of the audio signal output to the speaker SP, a microphone amplifier A2 that amplifies the level of the audio signal input through the microphone MIC, a monitor 21, and an operation A button 22 is provided.
The wireless adapter 3 includes a signal processing unit 30 having a wireless adapter communication control unit 30A and a wireless communication unit 31 having an antenna ANT1.

  The wireless communication unit 31 transmits and receives audio signals and video signals to and from the wireless extension base unit 4 to enable a call between the wireless extension base unit 4 and the camera-equipped doorphone slave unit 1 and a television intercom. At the time of call standby waiting for reception of a call signal from the master unit 1, a confirmation request signal is intermittently sent to the wireless extension master unit 4 and a confirmation reply signal is received.

  When waiting for a call, the wireless adapter communication control means 30A intermittently sends a confirmation request signal to the wireless extension base unit 4 from the wireless communication unit 31, and receives the confirmation reply signal. When a call signal is received from the TV intercom base unit 2 in this state, a call call signal is transmitted from the radio communication unit 31 and at least transmission / reception of a signal necessary for the call is started.

  The wireless extension base unit 4 includes a signal processing unit 40 having a wireless extension base unit communication control means 40A, a wireless communication unit 41 having an antenna ANT1, a human body detection sensor 4A, and a speaker for amplifying the level of an audio signal output to the speaker SP. An amplifier A1, a microphone amplifier A2 that amplifies the level of the audio signal input from the microphone MIC, a monitor 43, and operation buttons 44 are provided.

  The wireless communication unit 41 transmits and receives audio signals and audio signals to and from the wireless adapter 3 to enable a call between the wireless extension base unit 4 and the camera-equipped doorphone slave unit 1, and from the wireless adapter 3. When a call is waiting to receive the call call signal, a confirmation request signal intermittently sent from the wireless extension base unit 4 is received, and a reply signal is sent in response thereto.

  The wireless extension base station communication control means 40A sends a confirmation reply signal each time it receives a confirmation request signal intermittently sent from the wireless adapter 3 during call waiting. When the wireless extension master communication control means 40A receives the call calling signal from the wireless adapter 3, it starts at least transmission / reception of a signal necessary for the call.

In the first aspect of the present invention, the presence of a human body is determined by the human body detection sensor 4A provided in the wireless extension base unit 4, and when it is determined that the human body is absent, the driving of the wireless communication unit 41 is stopped to maintain the wireless communication disabled state. Like to do.
In other words, in the state where there is no person around the wireless extension base unit 4, the wireless extension base unit 4 is not used to respond to a visitor or the like. Since intermittent communication during standby is not performed, useless intermittent communication is stopped and power consumption can be suppressed.

Next, basic operations of the wireless adapter 3 and the wireless extension base unit 4 in the first inventive system will be described.
3 and 4 are flowcharts showing basic operations of the wireless adapter 3 and the wireless extension base unit 4, respectively.

As shown in FIG. 3, when the power is turned on, the wireless adapter 3 drives the wireless communication unit 31 and enters a call waiting state. That is, while the call signal is not received from the TV intercom base unit 2, intermittent communication is performed with the wireless extension base unit 4 to establish the wireless communication conditions, and a reply flag is received when the confirmation reply signal is received from the wireless extension base unit 4. Is set and the flag is reset while the confirmation reply signal is not received (100 to 104).
When a call signal is received from the TV interphone master unit 2 in the call waiting state, the reply flag is referred to. If the reply flag is not set, the wireless extension master unit 4 is connected to the TV interphone master unit 2. Is returned (102, 105, 106).

On the other hand, if a reply flag is set when a call signal is received from the TV interphone master unit 2, after a call call signal is transmitted, the TV interphone master unit 2 waits for a certain period of time to transmit data. In the meantime, after confirming that the wireless extension base unit 4 is ready to receive audio and video, if a video signal or audio signal is received from the TV intercom base unit 2 within a predetermined time, Then, the signals are communicated with each other via the wireless communication unit 31, and a call is started between the wireless extension base unit 4 and the door phone slave unit 1 with a camera. When the call ends, the process returns to the call waiting state in step 102 (102). 105, 107-110).
If no video signal or audio signal is received within a predetermined time, the process returns to the call waiting state in step 102 (108, 111).

On the other hand, as shown in FIG. 4, when the power of the wireless extension base unit 4 is turned on, power is supplied from the battery and the human body detection sensor 4A is driven to determine the detection signal of the human body detection sensor 4A. However, when it is determined that the human body is absent, the driving of the wireless communication unit 41 is stopped (200 to 203), but the human body detection sensor 4A determines the presence or absence of the human body and outputs a detection signal while the power is turned on. Output.
When the human body detection sensor 4A determines that a human body is present, the wireless communication unit 41 is driven, and when a confirmation request signal is transmitted from the wireless adapter 3, a confirmation reply signal is transmitted. The process is repeated until a signal is transmitted (202, 204 to 207).
Even when this intermittent communication is repeated, if the human body detection sensor 4A does not detect the human body, the driving of the wireless communication unit 41 is stopped (202, 203), and the wireless extension base unit 4 enters a sleep state.
On the other hand, when a call calling signal is received from the wireless adapter 3 while the wireless communication unit 41 is being driven, a ringing tone is output, a response by an operation to the call is waited for a certain time, and if there is a response, the wireless adapter 3 , The communication is started between the wireless extension base unit 4 and the camera-equipped doorphone slave unit 1, and when the call is finished, the call waiting state in step 202 is performed. Return to (207-211).
If no video signal or audio signal is received within a predetermined time, the process returns to the call waiting state at step 202 (209, 212).

  As described above, the human body detection sensor 4A is provided in the wireless extension base unit 4, and the drive of the wireless communication unit 41 is stopped by the detection determination of the sensor 4A, so that the wireless extension base unit 4 is in a sleep state. In the meantime, intermittent communication during call waiting can be stopped, and as a result, power consumption can be suppressed. Therefore, according to the configuration of the present invention, even when power is supplied from the battery as described above, the battery life is extended, so that the call waiting time of the wireless extension base unit 4 can be made longer than before.

  Note that a switch for selecting and setting the execution of the wireless control mode by the human body detection sensor 4A on the user side may be provided in the television intercom base unit 2 or the wireless extension base unit 4. If such a switch is provided in the TV interphone master unit 2 and this switch is operated so as to prohibit the drive and drive stop control of the radio communication unit 41 by the human body detection sensor 4A, the power source of the radio extension master unit 4 As long as it is turned on, the wireless communication unit 41 can be always in a driving state, and it is not necessary to repeat useless driving and driving stop when there are few people absent.

FIG. 5 is a diagram schematically showing an example of the basic configuration of the second present invention system.
The system according to the second aspect of the present invention comprises a TV interphone master unit 2, a door phone with camera 1 connected to the TV interphone master unit 2 by wire, a wireless adapter 3, and a wireless extension master for performing wireless communication with the wireless adapter 3. The machine 4 is comprised.
Here, the wireless adapter 3 is not directly connected to the camera-equipped doorphone slave unit 1 but directly connected to the TV interphone master unit 2 through the signal line L, and is supplied with power from the interphone master unit 2 and driven.
The signal line L is composed of a two-wire balanced cable or the like, and based on the power supply of the system, the transmission of a signal in which a system control signal including an audio signal, a video signal, and a paging signal is superimposed by a frequency multiplexing method is transmitted. Is done.

In the second aspect of the present invention, each of the wireless adapter 3 and the wireless extension base unit 4 performs wireless communication of communication control means 30A and 40A for performing wireless communication control and control signals, audio signals, and video signals by calling. First wireless communication units 31 and 41 and second wireless communication units 32 and 42 for performing intermittent communication during call waiting are provided.
Further, the wireless extension base unit 4 is provided with a human body detection sensor 4A for detecting the presence or absence of a human body, and as described later, the first and second wireless communication units 41 and 42 are driven and stopped according to the detection result. Switching. That is, when it is determined that there is no person, it is determined that the possibility of using the wireless extension base unit 4 is low, and wireless communication is disabled. In the figure, the human body detection sensor 4A is built in the wireless extension base unit 4, but an external connector may be provided and attached externally.

Next, the calling operation from the camera-equipped doorphone slave unit 1 will be described.
If there is a call at the camera-equipped doorphone slave unit 1, the voltage value of the signal line L changes, so that the TV interphone base unit 2 detects this change and recognizes that the call has been received. Then, the television intercom base unit 2 performs a call operation such as a ringing tone output and sends a call signal to the wireless adapter 3. When the wireless adapter 3 receives the call signal, the first wireless communication unit 31 sends the call signal to the wireless extension base unit 4 as a call call signal in the form of a wireless signal. In the present invention, the call signal sent in the form of a radio signal from the wireless adapter 3 to the wireless extension master 4 at this time is called a call call signal and is distinguished from the call signal issued by the television interphone master 2.

If there is a response at the TV interphone main unit 2 that is performing the calling operation, a communication path is formed with the camera-equipped doorphone slave unit 1 and communication is possible. However, the wireless extension base unit 4 is configured to perform the first wireless communication. When a call call signal is received by the unit 41, a call operation is performed to call a resident, and if there is a response, a call path is formed between the wireless extension base unit 4 and the camera-equipped doorphone sub unit 1 to enable a call.
In such an interphone system, when a call operation is performed on the TV interphone master unit 2 and the wireless extension master unit 4, a call is made between the first answering unit and the door phone slave unit 1 with a camera. A path is formed.

In addition, when the camera-equipped doorphone slave unit 1 is on standby for calling, wireless communication between the wireless adapter 3 and the wireless extension base unit 4 is performed by intermittently transmitting and receiving wireless signals between the wireless adapter 3 and the wireless extension base unit 4. The conditions are established. As described above, the intermittent communication is performed by the second wireless communication units 32 and 42.
The internal configuration of each device constituting the second aspect of the present invention is the same except for the second wireless communication units 32 and 42 described above, and therefore the block diagram and description thereof are omitted.

Next, basic operations of the wireless adapter 3 and the wireless extension base unit 4 in the second system of the present invention will be described.
6 and 7 are flowcharts showing basic operations of the wireless adapter 3 and the wireless extension base unit 4, respectively.
As shown in FIG. 6, when the wireless adapter 3 is powered on, it supplies power from the TV intercom base unit 2, drives the wireless communication unit 32, and stops driving the first wireless communication unit 31. Then, only the second wireless communication unit 32 is driven, and a call waiting state is entered. That is, in this call waiting state, while the call signal is not received from the TV intercom base unit 2, intermittent communication for establishing wireless communication by the wireless extension base unit 4 and the second wireless communication unit 32 is performed. When a confirmation reply signal is received from the wireless extension base unit 4, a reply flag is set and reset until a confirmation reply signal is not received (300 to 305).
When a call signal is received from the TV interphone master unit 2 in the call waiting state, if the reply flag is not set with reference to the reply flag, the wireless extension master unit 4 is connected to the TV interphone master unit 2. Is returned (303, 306, 307).

On the other hand, if the reply flag is set when the call signal is received from the TV interphone master unit 2, it is confirmed that the wireless extension master unit 4 is ready to receive voice and video after sending the call call signal. After confirming, the first wireless communication unit 31 is driven, the second wireless communication unit 32 is stopped, the data is transmitted from the TV interphone master unit 2 for a certain time, and within a certain time When a video signal or audio signal is received from the TV interphone master unit 2, signals are communicated with the wireless extension master unit 4 via the first wireless communication unit 31, and the wireless extension master unit 4 and the door phone with camera are connected. When a call is started with the device 1 and the call is finished, the process returns to the call waiting state of Step 102 (303, 306 to 313).
If no video signal or audio signal is received within a predetermined time, the process returns to the call waiting state at step 301 (311 and 314).

On the other hand, as shown in FIG. 7, when the power of the wireless extension base unit 4 is turned on, power is supplied from a battery or the like, and the human body detection sensor 4A is driven to determine the detection signal of the human body detection sensor 4A. If it is determined that the human body is absent, the driving of the first and second wireless communication units 41 and 42 is stopped (400 to 204). However, the human body detection sensor 4A is still turned on. The presence or absence of a human body is determined and a detection signal is output.
When it is determined by the human body detection sensor 4A that the human body is present, the driving of the first wireless communication unit 41 is stopped, only the second wireless communication unit 41 is driven, and then a confirmation request signal is transmitted from the wireless adapter 3. Then, a confirmation reply signal is transmitted, and this intermittent signal is repeated until a call calling signal is transmitted (402, 405 to 409).
Even when this intermittent communication is repeated, if the human body detection sensor 4A does not detect the human body, the driving of the first and second wireless communication units 41 and 42 is stopped (402 to 404), and the wireless extension parent The machine 4 enters a sleep state.

On the other hand, when the second wireless communication unit 42 is driven, if the call calling signal is received from the wireless adapter 3, the driving of the second wireless communication unit 42 is stopped and the first wireless communication unit 41 is turned on. Drive, output a ringing tone, wait for a response by operation for a certain period of time, and if there is a response, perform mutual communication of signals with the wireless adapter 3 via the wireless communication unit 41, 4 and the camera-equipped doorphone slave unit 1 start a call. When the call ends, the process returns to the call waiting state in step 402 (409 to 415).
If no video signal or audio signal is received within a predetermined time, the process returns to the call waiting state at step 402 (413, 416).

As described above, also in the second aspect of the present invention, the wireless extension master unit 4 is provided with the human body detection sensor 4A, and the drive of the wireless communication unit 41 is stopped by the detection determination of the sensor 4A. Is in a dormant state, intermittent communication during call waiting can be stopped during that period, and as a result, power consumption can be suppressed.
Furthermore, in the second aspect of the present invention, both the wireless adapter 3 and the wireless extension base unit 4 are the first wireless communication units 31 and 41 and the second wireless communication unit 32 for intermittent communication with less power consumption. , 42, the power consumption during intermittent communication can be further reduced, and the energy saving effect can be increased. Therefore, according to the configuration of the present invention, even when power is supplied by a battery or the like as described above, the life of the battery is extended, so that the call waiting time of the wireless extension base unit 4 can be made longer than before.

  As in the first embodiment, a switch for selecting and setting the execution of the wireless control mode by the human body detection sensor 4A on the user side may be provided in the television intercom base unit 2 or the wireless extension base unit 4. If such a switch is provided in the TV interphone master unit 2 and this switch is operated so as to prohibit the drive and drive stop control of the radio communication unit 41 by the human body detection sensor 4A, the power source of the radio extension master unit 4 As long as it is turned on, the wireless communication unit 41 can be always in a driving state, and it is not necessary to repeat useless driving and driving stop when there are few people absent.

It is a figure showing typically an example of the basic composition of the 1st present invention system. It is a block diagram showing an example of the basic composition of the 1st present invention system. It is a flowchart which shows an example of the basic operation | movement of the wireless adapter in 1st this invention. It is a flowchart which shows an example of the basic operation | movement of the radio | wireless extension main | base station in 1st this invention. It is a figure which shows typically an example of the basic composition of the 2nd invention system. It is a flowchart which shows an example of the basic operation | movement of the wireless adapter in 2nd this invention. It is a flowchart which shows an example of the basic operation | movement of the radio | wireless expansion main | base station in 2nd this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 (With a camera) Door phone subunit | mobile_unit 2 Television intercom main | base station 3 Wireless adapter 30A Wireless adapter communication control means 31 1st wireless communication part 32 2nd wireless communication part 4 Wireless expansion main | base station 40A Communication control means 41 1st radio | wireless Communication unit 42 Second wireless communication unit 4A Human body detection sensor L Signal line

Claims (2)

A wireless compatible intercom comprising a doorphone slave unit and an interphone master unit connected by a signal line, a wireless adapter having a wireless communication unit connected to the interphone master unit, and a wireless extension master unit added. A system,
The wireless adapter is not directly connected to the door phone slave unit, but is wired to the master unit,
The wireless extension base unit includes a human body detection sensor, a wireless communication unit, and a wireless communication control means.
The wireless communication control means discriminates the detection signal of the human body detection sensor and, when it is determined that no human body is present, does not drive the wireless communication unit of the wireless expansion base unit, and when it is determined that a human body exists, A wireless-compatible intercom system that starts driving the wireless communication unit of the master unit. A wireless intercom system configured by connecting a door phone slave unit and an interphone master unit with a signal line, further connecting a wireless adapter to the interphone master unit, and adding a wireless extension master unit,
The wireless adapter is connected to the base unit without being connected to the door phone slave unit, and the wireless adapter includes a wireless communication unit and a wireless adapter communication control unit, and the wireless extension parent unit. The machine includes a first wireless communication unit, a second wireless communication unit for intermittent communication with less power consumption, a human body detection sensor, and a wireless extension master communication control means,
The wireless extension master communication control means determines the presence of a person without driving the first and second wireless communication units when determining the absence of a person by determining the detection signal of the human body detection sensor. Then, the driving of only the second wireless communication unit is started, and after that, the period from the wireless adapter to receiving the call calling signal based on the calling signal from the base unit is only for the second wireless communication unit. While holding the drive and performing intermittent communication with the wireless adapter, after receiving the call call signal from the wireless adapter in that state, the driving of the second wireless communication unit is stopped. By starting the driving of the first wireless communication unit, the wireless extension master unit can communicate with the doorphone slave unit or the master unit through the master unit with the wireless adapter. It is configured to be possible, Line-enabled intercom system.

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