JP4995613B2 - Intercom system - Google Patents

Description

  The present invention relates to an interphone system having a crime prevention function against a suspicious person such as a thief, and in particular, detects the presence of an intruder and issues an alarm, and captures and records / stores an image of the intruder. It is related with the intercom system which can do.

  Conventionally, as this type of intercom system, an intercom system capable of reliably capturing an image of a person who has entered a detection area has been disclosed (see, for example, Patent Document 1).

  According to this intercom system, when there is a person in the detection area, it is possible to immediately shift to a recording operation, and it is possible to reliably capture an image of a person who has entered (entered) the detection area. Further, when the person exits or enters the detection area, the recording is started when the person is detected, so that the image of the suspicious person can be reliably captured.

Japanese Patent No. 3846382

  According to the intercom system of Patent Document 1 described in the background art, as a human sensor, a first sensor having a detection area at the entrance, and a second sensor having a detection area outside the detection area of the first sensor. Like a sensor, it was necessary to install a plurality of sensors in order to avoid malfunction of the sensor. In addition, in order to detect the erroneous detection operation of each of the first and second sensors, it is necessary to change the function of the interphone master unit. The number of recordings increases according to the erroneous detection operation, and the recording function is enabled. It was not possible to use it.

  The present invention has been made to solve these problems, and without using a plurality of sensors, an interphone slave unit having a video imaging function and an interphone master unit having a recording / storing function are used to intrude. It aims at providing the intercom system which can preserve | save a user's image | video reliably.

In order to achieve the above-described object, the interphone system according to the first aspect of the present invention includes an interphone slave unit having a camera, and a person intruding into a preset detection area installed close to the interphone slave unit. In order to record, store, and display images captured by a sensor for detecting a call, a call notification function unit and a call function unit for informing a call from an interphone handset and establishing a call A video recording / storing function unit, a video output function unit, and an interphone master unit having a master unit alarm issuing function unit for issuing an alarm to the presence of an intruder detected by a sensor. The recording / storing function unit of the intercom base unit is composed of a recording / playback circuit and a memory circuit. The intercom master starts recording to the recording / playback circuit at the input timing of the intrusion detection signal generated by the sensor that has detected the presence of the intruder, and the intruder remains in the detection area for a certain period of time. Or when a security anomaly detection signal generated by a sensor detected as having entered or exited multiple times is input, the video recorded on the recording / playback circuit at a predetermined time before the input of the security anomaly detection signal is recorded. When the call signal from the interphone slave unit is input after the operation to be stored in the memory circuit and the intrusion detection signal are input, the call from the interphone slave unit is notified, and the call signal is input. An operation is performed in which the video recorded in the recording / playback circuit is stored in the memory circuit at a predetermined time after the previous predetermined time and the calling signal are input .

  The intercom system according to the second aspect of the present invention is the interphone system according to the first aspect of the present invention, in addition to the video recorded in the recording / playback circuit not only for a predetermined time before the time when the security abnormality detection signal is input. Then, it is stored in the memory circuit at a predetermined time after the time when the crime prevention abnormality detection signal is inputted.

  The interphone system according to the third aspect of the present invention is the interphone system according to the first aspect or the second aspect of the present invention, wherein the interphone base unit has a base unit alarm issue function when a security abnormality detection signal is input. And the slave unit alarm issuing function unit of the interphone slave unit are activated.

  The interphone system according to the fourth aspect of the present invention is the interphone system according to any one of the first to third aspects of the present invention. The machine alarm issuance function unit is controlled to be inactive, and the standby state is set.

  According to the intercom system of the present invention, the video recorded by the interphone master unit is recorded at the timing when the sensor detects that a suspicious person such as a thief has entered a preset detection area. Video that has been recorded in the recording / playback circuit in advance for a predetermined time before the recording to the playback circuit is started and the presence of an intruder in the detection area continues for a certain period of time or is detected as multiple times of entering and exiting; By storing the video recorded on the recording / playback circuit at a predetermined time after detection in the memory circuit, only the video of the suspicious person such as a thief who is an intruder can be reliably stored in the memory circuit, When this video is reproduced on the monitor and confirmed, it can be an effective material for determining the suspicious person. Also, if the presence of an intruder in the detection area continues for a certain period of time or is detected as having entered or exited multiple times, an alarm is issued by the interphone master unit and interphone slave unit, respectively. Can be increased. Furthermore, despite the fact that the sensor has detected that a suspicious person such as a thief has entered the preset detection area, the presence of the intruder in the detection area continues for a certain period of time, or as a multiple entry / exit If it is not detected, the intercom master can be restored to the standby state.

  In addition, according to the intercom system of the present invention, at the timing when the sensor detects that a visitor has entered a preset detection area, the interphone master unit can record / record images captured by the interphone slave camera. Recording to the playback circuit is started, and the video previously recorded in the recording / playback circuit at a predetermined time before the call operation by the visitor is detected, and the video recorded to the recording / playback circuit at a predetermined time after detection By storing the video in the memory circuit, it is possible to reliably store only the video of the visitor in the memory circuit, and it is effective for discriminating the visitor when reproducing and checking this video on the monitor. It can be made with a new material.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments to which an intercom system of the invention is applied will be described with reference to the drawings. 1A is a system explanatory diagram showing an external configuration of an interphone system according to an embodiment of the present invention, and FIG. 1B is an explanatory diagram showing an installation example of an interphone system according to an embodiment of the present invention. It is. FIG. 2 is a block diagram showing a specific configuration of the intercom system according to the embodiment of the present invention. FIGS. 3A and 3B are time charts for explaining specific operations of the intercom system according to the embodiment of the present invention.

  1A, 1B, and 2 show an interphone system 1 installed outside a dwelling unit such as a front door, a sensor 2 installed close to the interphone handset 1, and a dwelling unit. And interphone master unit 3 to which interphone slave unit 1 and sensor 2 are connected via individual transmission lines (hereinafter referred to as slave unit lines and sensor lines) L1 and L2, respectively. .

  The intercom handset 1 shown in FIG. 1A includes a handset operating unit 100, a camera 101, a handset microphone 102, and a handset speaker 103. Here, the cordless handset operating unit 100 performs a call operation for a visitor outside the dwelling unit to call a resident in the dwelling unit. For example, a call button is preferable. In addition, as shown in FIG. 1B, the camera 101 captures a video of a visitor who has performed a call operation and a video of an intruder detected by the sensor 2 with a predetermined imaging area Z1 set in advance. For example, various imaging media such as a CCD and a CMOS are suitable. Furthermore, the handset microphone 102 and handset speaker 103 are used to input / output voices (transmitted voice and received voice) for a visitor to establish a call with a resident. In addition to the above-mentioned call function, a call confirmation notification function for outputting a call confirmation sound or a voice message indicating that a call operation performed by a visitor has been normally notified by the intercom base unit 3; Each is provided with an alarm issuing function for outputting an alarm sound or a voice message indicating that the intruder detected by the sensor 2 is a suspicious person such as a thief.

  A sensor 2 shown in FIG. 1A has a human body detection unit 200. Here, as shown in FIG. 1 (b), the human body detection unit 200 has a predetermined detection area Z2 set in advance, detects an intruder into the detection area Z2, and generates an intrusion detection signal when the intruder is detected. Is for.

  The intercom base unit 3 shown in FIG. 1A includes a monitor 300, a base unit microphone 301, a base unit speaker 302, and a base unit operation unit 303. Here, the monitor 300 not only displays an image picked up by the camera 101 of the intercom handset 1, but also a call notification for displaying a call message or picture data indicating that there is a call from a visitor. And a warning function for displaying a warning message or picture data indicating that the intruder detected by the sensor 2 (the human body detection unit 200) is a suspicious person such as a thief. For example, various image output media such as an LCD, a PDP, and an organic EL display are suitable. The base unit microphone 301 and the base unit speaker 302 are for inputting and outputting voices (transmitted voice and received voice) for the resident to establish a call with the visitor. In addition to the above-mentioned call function, a call notification function for outputting a ringing sound or voice message indicating that a call is made by a visitor, and an intruder detected by the sensor 2 (the human body detection unit 200) Are provided with an alarm alerting function for outputting an alarm sound, a voice message or the like indicating that the person is a suspicious person such as a thief. Further, the base unit operation unit 303 confirmed that there is a reproduction operation function for causing the monitor 300 to reproduce a video signal read from a memory circuit 305 (see FIG. 2) described later and a call from a visitor. A response operation function for establishing a call using the parent device microphone 301 and the parent device speaker 302 in response to a resident, and an end call operation function for ending the established call are provided. Independent press buttons such as a play button and a call button, a touch panel disposed on the front surface of the monitor 300, and the like are preferable.

  Next, the interphone handset 1 shown in FIG. 2 includes the above-described handset operation unit 100, camera 101, handset microphone 102, handset speaker 103, handset communication circuit 104, handset power supply circuit 105, A slave unit transmission circuit (hereinafter referred to as slave unit I / F) 106 is provided. Here, the handset communication circuit 104 performs signal processing of an audio signal that is a voice (transmitted voice, received voice) inputted / outputted by the handset microphone 102 and handset speaker 103, for example, 4-wire / 2-wire conversion, 2-wire / 4-wire conversion, amplification and the like. The slave unit power supply circuit 105 receives the slave unit power supplied from the master unit power supply circuit 308 (described later) of the interphone master unit 3 via the slave unit line L1, and supplies the slave unit power supply circuit 308 to each component / circuit of the slave unit. It is for supply. Further, the slave unit I / F 106 is a signal transmission path from the slave unit operation unit 100 to the slave unit line L1, a signal transmission path from the camera 101 to the slave unit line L1, and from the slave unit line L1 to the slave unit speaker 103. Signal transmission path, a signal transmission path (speech path) between the slave unit call circuit 104 and the slave unit line L1, and a power supply path from the slave unit line L1 to the slave unit power supply circuit 105, respectively. belongs to.

  The sensor 2 illustrated in FIG. 2 includes the above-described human body detection unit 200, a crime prevention abnormality detection unit 201, and a sensor transmission circuit (hereinafter referred to as sensor I / F) 202. Here, the crime prevention abnormality detection unit 201 monitors the operation of the human body detection unit 200 and detects the crime prevention abnormality detection when it is determined that the presence of an intruder continues in the detection area Z2 for a certain period of time or has entered and exited multiple times. It is for generating a signal. The sensor I / F 202 is for forming a signal transmission path from the human body detection unit 200 to the sensor line L2 and a signal transmission path from the crime prevention abnormality detection unit 201 to the sensor line L2.

  The interphone master unit 3 shown in FIG. 2 includes the monitor 300, the master unit microphone 301, the master unit speaker 302, and the master unit operation unit 303, a recording / playback circuit 304, a memory circuit 305, and a voice synthesis circuit 306. , Base unit call circuit 307, base unit power supply circuit 308, slave unit side master unit transmission circuit (hereinafter referred to as slave unit side master unit I / F) 309, and sensor side master unit transmission circuit (hereinafter referred to as sensor side). And a control circuit 311. Here, the recording / playback circuit 304 is controlled by the control circuit 311, and outputs the video signal of the electrical signal, which is the video imaged by the camera 101 of the intercom slave device 1, to the monitor 300 as a real-time video. Alternatively, it is for recording (compressed) or reproducing (decompressing) a video signal read from a memory circuit 305 described later on the monitor 300. The memory circuit 305 is controlled by the control circuit 311 and is used to store a video signal recorded in advance in the recording / playback circuit 304. For example, various storage media such as RAM and EEPROM are suitable. The The voice synthesis circuit 306 is controlled by the control circuit 311, and a ringing sound signal such as a ringing sound or a voice message indicating that there is a call from the visitor, and a call operation performed by the visitor are sent to the parent device. And a call confirmation sound signal such as a call confirmation sound and a voice message indicating that the call has been normally notified, and an alarm that the intruder detected by the sensor 2 (the human body detection unit 200) is a suspicious person such as a thief. This is for generating warning sound signals such as sounds and voice messages. Further, the base unit call circuit 307 is controlled by the control circuit 311, and performs signal processing on a voice signal of an electrical signal that is voice (transmitted voice, received voice) input / output by the base unit microphone 301 and the base unit speaker 302. For example, 4 line / 2 line conversion, 2 line / 4 line conversion, amplification, etc. are performed. The base unit power supply circuit 308 is controlled by the control circuit 311 to generate a base unit power source that is rectified and smoothed with respect to the commercial power source, supplies the base unit power to each component / circuit of the base unit, and passes through the slave unit line L1. Thus, the cordless handset power to be supplied to the intercom cordless handset 1 is generated. The slave unit side master unit I / F 309 includes a signal transmission path from the slave unit line L 1 to the recording / playback circuit 304, a signal transmission path from the voice synthesis circuit 306 to the slave unit line L 1, and a master unit call circuit 307. And a signal transmission path between the slave unit line L1, a power supply path from the master unit power supply circuit 308 to the slave unit line L1, and a signal transmission path between the control circuit 311 and the slave unit line L1. Each is for forming. The sensor-side master unit I / F 310 is for forming a signal transmission path from the sensor line L2 to the control circuit 311. Further, the control circuit 311 has a time measuring function, and controls each component / circuit of the parent device as described above, and measures the time required for the control.

  In the intercom system according to the embodiment of the present invention configured as described above, a specific operation will be described below with reference to the drawings.

  As a first operation, when a suspicious person P1 such as a thief approaches the intercom handset 1 and enters a predetermined detection area Z2 of the human body detection unit 200 of the sensor 2 as shown in FIG. The human body detection unit 200 that detects the human body of the suspicious person P1 generates an intrusion detection signal S1. In FIG. 2, the intrusion detection signal S1 generated by the human body detection unit 200 of the sensor 2 is controlled via the sensor I / F 202, the sensor line L2, and the sensor side master unit I / F 310 of the intercom master unit 3. It is transmitted to the circuit 311. In addition, the crime prevention abnormality detection unit 201 of the sensor 2 monitors whether or not an intrusion detection signal S1 is output from the human body detection unit 200 to the intercom master unit 3.

  When receiving the intrusion detection signal S1 from the human body detection unit 200 of the sensor 2, the control circuit 311 of the intercom base unit 3 shown in FIG. 2 shifts from the standby state to the intrusion detection state, as shown in FIG. When the timer function becomes active, the master unit power supply circuit 308 is controlled to supply the master unit power generated to the recording / playback circuit 304 to activate the record / playback circuit, and the master unit power supply circuit 308 is controlled in the same manner. The slave unit power source for activating the camera 101 of the intercom slave unit 1 generated in this way is transmitted via the slave unit side master unit I / F 309, the slave unit line L1, and the slave unit I / F 106 of the slave unit. This is supplied to the handset power supply circuit 105.

  The slave unit power supply circuit 105 of the interphone slave unit 1 shown in FIG. 2 receives the slave unit power from the master unit power supply circuit 308 of the interphone master unit 3 and supplies the slave unit power to the camera 101 to activate the camera. And In addition, the camera 101 starts capturing an image of a suspicious person P1 such as a thief in the imaging area Z1 shown in FIG. 1B and generates a video signal S2. The video signal S2 is transmitted from the camera 101 to the recording / playback circuit 304 via the slave unit I / F 106, the slave unit line L1, and the slave unit side master unit I / F 309 of the interphone master unit 3.

  2 receives the video signal S2 from the camera 101 of the intercom handset 1 and starts recording. Note that the video signal S2 recorded in the recording / reproducing circuit 304 is given time information such as an imaging time by the time measuring function of the control circuit 311.

  Thereafter, the crime prevention abnormality detection unit 201 of the sensor 2 shown in FIG. 2 is configured so that a suspicious person P1 such as a thief continuously enters the predetermined detection area Z2 of the human body detection unit 200 for a certain period of time. Output of the human body detection signal S1 from the human body detection unit when the output of the human body detection signal S1 from the detection unit is continued for a certain time, or so that a suspicious person P1 such as a thief enters and exits the detection area Z2 a plurality of times If it is intermittent, it is determined that there is a crime prevention abnormality, and a crime prevention abnormality detection signal S3 is generated. The security abnormality detection signal S 3 generated by the security abnormality detection unit 201 is transmitted to the control circuit 311 via the sensor I / F 202, the sensor line L 2, and the sensor side parent device I / F 310 of the intercom parent device 3. The

  When the control circuit 311 of the intercom master unit 3 shown in FIG. 2 receives the security abnormality detection signal S3 from the security abnormality detection unit 201 of the sensor 2, the control circuit 311 shifts from the intrusion detection state to the alarm state, as shown in FIG. As described above, the timing of the predetermined time (hereinafter referred to as the first time) T1 is started, and the recording / playback is performed at the predetermined time (hereinafter referred to as the second time) T2 before the security abnormality detection signal S3 is received. The video signal S2 previously recorded in the circuit 304 is not only stored in the memory circuit 305, but is also captured by the camera 101 of the intercom handset 1 at the first time T1 and recorded in the recording / playback circuit 304. S2 can be stored in the memory circuit 305, and can be displayed on the monitor 300 as a real-time video. The control circuit 311 that has been shifted from the intrusion detection state to the alarm state monitors an alarm message or picture data indicating that the intruder detected by the human body detection unit 200 of the sensor 2 is a suspicious person P1 such as a thief. In addition, it is possible to display information on the server 300 such as a security management company by using an appropriate communication means (not described in detail). .

  As apparent from the above description, the control circuit 311 of the intercom master unit 3 shown in FIG. 2 detects the human body of the sensor 2 that detects that a suspicious person P1 such as a thief has entered the preset detection area Z2. At the timing when the intrusion detection signal S1 from the unit 200 is received, the video (video signal S2) imaged by the camera 101 of the intercom handset 1 can be started to be recorded in the recording / playback circuit 304, and the detection area Predetermined time before receiving the security abnormality detection signal S3 from the security abnormality detection unit 201 of the sensor 2 detected as the presence or absence of a suspicious person P1 such as a thief in Z2 for a certain period of time or as a plurality of times of entering and exiting (second) The video recording / playback circuit 304 at a predetermined time (first time) T1 after receiving the video (video signal S2) previously recorded in the video recording / playback circuit 304 at T2 and the security abnormality detection signal. By storing the video (video signal S2) to be recorded in the memory circuit 305, only the video (video signal S2) of the suspicious person P1 such as a thief who is an intruder is reliably stored in the memory circuit 305. Can do.

  When the control circuit 311 of the intercom master unit 3 shown in FIG. 2 receives a security abnormality detection signal S3 from the security abnormality detection unit 201 of the sensor 2 and enters an alarm state, it controls the voice synthesis circuit 306 to generate an alarm. The report sound signal S4 can be generated. This alarm sound signal S4 is transmitted from the voice synthesizing circuit 306 to the master speaker 302, and a suspicious person P1 such as a thief continues in a predetermined detection area Z2 of the human body detection unit 200 of the sensor 2 for a certain period of time. Not only is it output as an alarm sound such as an alarm sound or voice message indicating that a suspicious person P1 such as a thief has entered or exited the detection area Z2 multiple times, but also from the voice synthesis circuit 306 It is transmitted to handset speaker 103 via handset I / F 309 on handset side, handset line L1, handset I / F 106 of intercom handset 1 and threatens suspicious person P1 such as a thief to alarm outside the dwelling unit. Crime prevention can be improved by outputting a warning sound or a warning sound such as a voice message.

  Furthermore, when a resident or a security guard such as a security management company performs a playback operation using the base unit operation unit 303 of the intercom base unit 3 shown in FIG. 2, the control circuit 311 detects the playback operation. After the video signal S2 is read from the memory circuit 305 and transmitted to the monitor 300 via the recording / playback circuit 304, the video signal S2 can be played back with time information such as an imaging time attached. As a result, it can be an effective material for identifying a suspicious person P1 such as a thief for a resident or a security guard such as a security management company.

  It should be noted that after the control circuit 311 of the intercom master unit 3 shown in FIG. 2 receives the intrusion detection signal S1 from the human body detection unit 200 of the sensor 2 and the time counting function is activated, the crime prevention of the sensor 2 is performed within a certain time. When the security abnormality detection signal S3 from the abnormality detection unit 201 is not received, the control circuit 311 changes from the intrusion detection state to the standby state, that is, is restored to the standby state.

  Next, as a second operation, when a visitor P2 approaches the intercom handset 1 and enters a predetermined detection area Z2 of the human body detection unit 200 of the sensor 2 as shown in FIG. The human body detection unit 200 that has detected the human body of the visitor P2 generates an intrusion detection signal S1 and sends it to the control circuit 311 of the intercom master unit 3 as in the first operation described above. The presence or absence of an intrusion detection signal S1 is monitored.

  When receiving the intrusion detection signal S1 from the human body detection unit 200 of the sensor 2, the control circuit 311 of the intercom base unit 3 shown in FIG. 2 shifts from the standby state to the intrusion detection state, as shown in FIG. When the timer function becomes active, the master unit power supply circuit 308 is controlled to supply the master unit power generated to the recording / playback circuit 304 to activate the record / playback circuit, and the master unit power supply circuit 308 is controlled in the same manner. The slave unit power for activating the camera 101 of the interphone slave unit 1 generated in this manner is supplied to the slave unit power supply circuit 105 of the interphone slave unit, as in the first operation described above.

  The slave unit power supply circuit 105 of the interphone slave unit 1 shown in FIG. 2 receives the slave unit power from the master unit power supply circuit 308 of the interphone master unit 3 and supplies the slave unit power to the camera 101 to activate the camera. And In addition, the camera 101 starts imaging the video of the visitor P2 in the imaging area Z1 shown in FIG. 1B and generates a video signal S5. This video signal S5 is transmitted to the recording / reproducing circuit 304 of the intercom master unit 3 through the same signal transmission path as the video signal S2.

  2 receives the video signal S5 from the camera 101 of the intercom handset 1 and starts recording. Note that the video signal S4 recorded in the recording / reproducing circuit 304 is given time information such as an imaging time by the time measuring function of the control circuit 311.

  Thereafter, since the visitor P2 approaching the intercom handset 1 calls the resident, when a call operation is performed using the handset operating unit 100, a call signal S6 is generated. The call signal S6 generated by the slave unit operation unit 100 is transmitted to the control circuit 311 via the slave unit I / F 106, the slave unit line L1, and the slave unit side master unit I / F 309 of the interphone master unit 3. Is done.

  When the control circuit 311 of the interphone master unit 3 shown in FIG. 2 receives the call signal S6 from the slave unit operation unit 100 of the interphone slave unit 1, the control circuit 311 shifts from the intrusion detection state to the call state, as shown in FIG. Thus, the recording / playback circuit 304 is started at a predetermined time (hereinafter referred to as a fourth time) T4 before starting to measure the predetermined time (hereinafter referred to as a third time) T3 and at the same time before receiving the calling signal S5. In addition to storing the video signal S5 recorded in advance in the memory circuit 305, the video signal S5 captured by the camera 101 of the intercom handset 1 and recorded in the recording / playback circuit 304 at the third time T3 is recorded. The image can be stored in the memory circuit 305 and further displayed on the monitor 300 as a real-time video. Note that the control circuit 311 that has been shifted from the intrusion detection state to the call state can also display a call message, picture data, or the like indicating that there is a call from the visitor P2 on the monitor 300.

  As will be apparent from the above description, the control circuit 311 of the intercom base unit 3 shown in FIG. 2 detects from the human body detection unit 200 of the sensor 2 that has detected that the visitor P2 has entered the preset detection area Z2. When the intrusion detection signal S1 is received, recording of the video (video signal S5) captured by the camera 101 of the intercom handset 1 to the recording / playback circuit 304 can be started. The video (video signal S5) recorded in advance in the recording / playback circuit 304 at a predetermined time (fourth time) T4 before receiving the call signal S6 from the interphone handset 1 that has been operated, and the call signal The video (video signal S5) recorded in the video recording / playback circuit 304 at a predetermined time (third time) T3 after receiving the video is stored in the memory circuit 305, so that the video of the visitor P2 (video) is recorded. Only the image signal S2) can be reliably stored in the memory circuit 305.

  When the control circuit 311 of the interphone master unit 3 shown in FIG. 2 receives the call signal S6 from the slave unit operation unit 101 of the interphone slave unit 1, the control circuit 311 controls the voice synthesis circuit 306 to call the call notification sound signal S7 and the call signal. A confirmation sound signal S8 can be generated. Here, the call notification sound signal S7 is transmitted from the voice synthesis circuit 306 to the main unit speaker 302 and is output as a call notification sound such as a call sound or a voice message indicating that there is a call from the visitor P2. On the other hand, the call confirmation sound signal S8 is transmitted from the voice synthesizing circuit 306 to the slave unit I / F 309, the slave unit line L1, the slave unit I / F 106 of the intercom slave unit 1, and the slave unit call circuit 104. It is transmitted to the speaker 103 and is output as a call confirmation sound or a voice message indicating that the call operation performed by the visitor P2 has been normally notified by the parent device.

  Here, when the video of the visitor P2 is displayed in real time on the monitor 300 of the interphone master unit 3 shown in FIGS. 1A and 2, respectively, and the call notification sound is output from the master unit speaker 302, the resident Is confirmed in the dwelling unit and there is a call from the visitor P2 together with the discrimination of the visitor. Under the control of the detected control circuit 311, the base unit microphone 301 and the base unit speaker 302 used by the resident, the base unit call circuit 307, the slave unit side master unit I / F 309, the slave unit line L 1, the interphone slave unit 1 A signal transmission path between the handset microphone 102 and the handset speaker 103 used by the visitor P2 via the handset I / F 106 and handset call circuit 104, that is, a call path is formed, and the formed call Via the road Since the call is established by transmitting and receiving the audio signal, the resident can make a call while confirming the state of the visitor P2.

  On the other hand, the video of the visitor P2 is displayed in real time on the monitor 300 of the interphone base unit 3 shown in FIGS. 1A and 2, and the call notification sound is output from the base unit speaker 302. When the resident is out of the house due to going out, etc., when the resident performs a playback operation using the base unit operation unit 303 when returning home, the memory is controlled by the control of the control circuit 311 that detects the playback operation. After the video signal S5 is read from the circuit 305 and transmitted to the monitor 300 via the recording / playback circuit 304, the video signal S5 can be played back in a state where time information such as an imaging time is given. As a result, it can be an effective material for the resident to discriminate the visitor P2 who has performed a call operation when the inside of the dwelling unit is absent due to going out or the like.

  In the interphone system of the present invention, the embodiment in which the control circuit 311 has the timekeeping function of the interphone master unit 3 has been described as an example, but the embodiment is not limited to this embodiment. For example, a timer circuit (not shown) controlled by the control circuit 311 may be separately provided as a component / circuit having a timekeeping function.

  Further, the interphone system of the present invention has been described with a specific embodiment. However, the present invention is not limited to this embodiment, and any interphone system having any known configuration can be used as long as the effects of the present invention are achieved. It goes without saying that even if there is, it can be adopted.

FIG. 1A is a system explanatory diagram showing an external configuration of an intercom system according to an embodiment of the present invention, and FIG. 1B is an explanatory diagram showing an installation example of an interphone system according to an embodiment of the present invention. . FIG. 2 is a block diagram showing a specific configuration of the intercom system according to the embodiment of the present invention. FIG. 3 is a time chart showing specific operation timings of the intercom system according to the embodiment of the present invention.

1 …… Interphone slave unit 101 …… Camera 103 …… Slave unit speaker (Slave unit alarm function)
2 …… Sensor 3 …… Interphone master unit 300 …… Monitor (call alert function unit, video output function unit, master unit alarm report function unit)
301 …… Base microphone (call function part)
302 …… Master speaker (call alert function unit, call function unit, master device alarm function unit)
304 …… Recording / playback circuit (recording / saving function part)
305 …… Memory circuit (Recording / saving function part)
306 …… Speech synthesizer (call alert function, master alarm function)
307 …… Master phone call circuit (call function part)
Z2 …… Detection area (provided by the sensor camera) S1 …… Intrusion detection signal S3 …… Anomaly detection signal S6 …… Call signal T1, T2, T3, T4 …… First to fourth time (predetermined time)

Claims (4)

Interphone handset (1) having a camera (101), a sensor (2) installed close to the interphone handset and detecting that a person has entered a preset detection area (Z2), and the interphone Call notification function units (300, 302, 306) and call function units (301, 302, 307) for informing a call from a slave unit and establishing a call, and images captured by the camera of the interphone slave unit. Recording / storing function unit (304, 305) and video output function unit (300) for recording / storing and outputting, and main unit alarm for issuing alarm on presence of intruder detected by the sensor An intercom master unit (3) having a reporting function (302, 306),
The recording / storing function unit of the interphone master unit includes a recording / playback circuit (304) and a memory circuit (305),
The intercom master unit starts recording to the recording / playback circuit at the input timing of an intrusion detection signal (S1) generated by the sensor that has detected the presence of the intruder, and within the detection area, When a crime prevention abnormality detection signal (S3) generated by the sensor that has been detected for a certain period of time as a presence or absence of an intruder is input, the time when the crime prevention abnormality detection signal is input An operation of storing the video recorded in the recording / playback circuit in the previous predetermined time (T2) in the memory circuit, and a call signal (S6) from the interphone slave unit after the intrusion detection signal is input When the call from the intercom handset is notified, the call state is entered, and the call signal is input at a predetermined time (T4) before the call signal is input and at a predetermined time (T3) after the call signal is input. Intercom system and performs an operation to save the image-reproduction circuit recorded video to said memory circuit.   The memory circuit is recorded not only in a predetermined time before the time when the security abnormality detection signal is input, but also in a predetermined time (T1) after the time when the security abnormality detection signal is input. The intercom system according to claim 1, wherein the intercom system is stored in   The interphone master unit activates the master unit alarm reporting function unit and the slave unit alarm reporting function unit (103) of the interphone slave unit when the crime prevention abnormality detection signal is input. The intercom system according to claim 1 or 2.   The interphone master unit is placed in a standby state by controlling the recording function unit and the master unit alarm reporting function unit to be inactive when the crime prevention abnormality detection signal is not input. The intercom system according to any one of claims 1 to 3.

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