JP2013197962A - Interphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency in a charge function of a handset and enable the handset to transmit and receive voice signals, by allowing the handset to receive in a non-contact manner electricity generating at an electricity feeding device by combining magnetic fields between a base phone and the handset.SOLUTION: In the interphone system, magnetic fields generating between an electric transmission resonance section 14 of a base phone 1 and an electric reception resonance section 22 of a handset 2 are combined. The resonance section of the handset, composed of serially connected pickup coils L2 and a serial resonance circuit having a resonance capacitor C2, converts electricity transmission signals of received high-frequency signals to a DC power supply, through a diode bridge DB of a rectification section 23 parallely connected to the pickup coils, which is charged to a battery 25. The handset also outputs voice signals overlapped together with the electricity transmission signals on the high-frequency signals from a receiver 21 through a reception section 27, and transmits voice signals inputted to a microphone 20 using high-frequency signals from a mouthpiece 26, which is transmitted in a non-contact manner from the electric reception resonance section to the electric transmission resonance section of the base phone.

Description

  The present invention relates to an interphone system that establishes a call by transmitting and receiving voice signals in a contactless manner to supply power to a handset from a base unit, and in particular, charging efficiency of a handset that is contactlessly powered by a base unit. Related to enhanced intercom system.

  Conventionally, when power is supplied from a power transmission unit to a power reception unit in a contactless manner, a power transmission unit for transmitting power and a power reception unit for receiving power are provided, and an electromagnetic dielectric action is performed from the power transmission unit to the power reception unit. There has been disclosed a non-contact charger capable of charging a secondary battery provided in a power receiving unit by transmitting power in a non-contact manner (see, for example, Patent Document 1).

JP 11-98706 A

  However, in the non-contact charger disclosed in Patent Document 1 described in the background art, a coil (spiral coil) provided as an electromagnetic dielectric action and a resonance capacitor are connected in parallel to each of the power transmission unit and the power reception unit, and parallel resonance is caused. Since it is an aspect of power supply, as shown by the broken line in the graph of FIG. 2, the charging efficiency was low when charging the secondary battery.

  Moreover, according to the non-contact charger of patent document 1, as described above, the power is transmitted in a non-contact manner using the electromagnetic dielectric action from the power transmission unit to the power reception unit, and the power reception unit is provided. Although the secondary battery can be charged, there is no function for transmitting an audio signal for establishing a call between the power transmission unit and the power reception unit.

  The present invention has been made to solve such a problem, and the power generated by the power transmitter is generated in series resonance by the magnetic field coupling generated between the resonance unit of the master unit and the resonance unit of the handset. The purpose of the present invention is to provide an interphone system capable of improving the efficiency of the charging function of the transmitter / receiver and transmitting / receiving a voice signal for establishing a call by receiving power by the power receiver in a non-contact manner based on the aspect It is supposed to be.

  In order to achieve the above-described object, an interphone system according to a first aspect of the present invention is provided between a power transmission side resonance unit of a base unit and a power reception side resonance unit of a handset each having a predetermined resonance frequency in a near electromagnetic field. In the system, the power generated in the master unit is supplied to the handset in a contactless manner by the magnetic field coupling generated in step 1, and the voice signal for establishing a call is transmitted and received. The master unit amplifies the high-frequency signal generation unit for transmitting the transmission signal on which the audio signal is superimposed as a high-frequency signal, and the high-frequency signal transmitted from the high-frequency signal generation unit, and receives the amplified high-frequency signal in a contactless manner. A high-frequency signal amplifier for transmitting to the power-receiving-side resonator of the electric device. The handset includes a rectifying unit that converts a high-frequency power transmission signal received by the power-receiving-side resonance unit into a DC power source and charges a power storage unit such as a secondary battery. The power receiving side resonance unit is configured by a series resonance circuit having a pickup coil and a resonance capacitor connected in series.

  According to the interphone system of this aspect, when supplying a high-frequency power transmission signal to the handset as the power generated in the base unit, the power-receiving-side resonance unit of the handset that receives this power transmission signal is provided. Since it is composed of a series resonance circuit, the current becomes maximum at the resonance frequency of the power reception side resonance unit.

  In the intercom system according to the second aspect of the present invention, in the first aspect of the present invention, the rectification unit is configured by a diode bridge connected in parallel to the pickup coil of the power reception side resonance unit.

  According to the interphone system of this aspect, it is possible to charge the power storage unit via the rectifier unit with the power that maximizes the current at the resonance frequency of the power reception side resonance unit of the handset. Charging efficiency is increased.

  In the intercom system according to the third aspect of the present invention, in the first aspect or the second aspect of the present invention, the handset is connected in parallel to the pickup coil of the power reception side resonance unit, and the power reception side resonance unit is connected. A high-frequency signal received from the receiver, and a transmission / reception unit for transmitting a voice signal input to the microphone as a high-frequency signal.

  According to the interphone system of this aspect, when a power transmission signal of a high-frequency signal is supplied to the handset as power generated in the master unit, a voice signal is transmitted by being superimposed on the power transmission signal of the high-frequency signal. Not only becomes possible, but also high-frequency signals can be transmitted from the handset to the base unit, so that a call can be established between the base unit and the handset.

  The intercom system according to the fourth aspect of the present invention is the intercom system according to any one of the first to third aspects of the present invention, wherein the power transmission side resonance unit includes a pickup coil and a resonance connected in series. It is composed of a series resonant circuit having a capacitor.

  According to the interphone system of this aspect, when the power transmission signal of the high frequency signal is supplied to the handset as the power generated in the base unit, the power transmission side resonance unit that transmits the power transmission signal is a series resonance circuit. Since it is configured, it is possible to transmit a power transmission signal that maximizes the current at the resonance frequency of the power transmission side resonance unit.

  According to the intercom system of the present invention, the power generated in the base unit is series-resonated as a power transmission signal of the high frequency signal by magnetic field coupling generated between the power transmission side resonance unit of the base unit and the power receiving side resonance unit of the handset. Since the current is maximized at the resonance frequency (series resonance frequency) applied to the series resonance by causing the transmitter / receiver to receive power in a non-contact manner based on the above aspect, the charging efficiency applied to the power storage unit of the transmitter / receiver is increased. . In addition, it is possible not only to transmit the audio signal to the handset by superimposing it on the power transmission signal of the high frequency signal, but also to transmit the high frequency signal for the transmission of the audio signal from the handset to the master unit, A call can be established between the parent device and the handset.

FIG. 1A is a system explanatory diagram showing an overall configuration of an intercom system according to an embodiment of the present invention. FIG. 1B is a circuit block diagram showing a specific configuration of the intercom system according to the embodiment of the present invention. FIG. 2 is a graph showing charging characteristics of the power storage unit provided in the handset in the intercom system according to the embodiment of the present invention.

  Embodiments to which the intercom system of the present invention is applied will be described below with reference to the drawings.

  FIG. 1A is a system explanatory diagram showing the overall configuration of an intercom system according to an embodiment of the present invention. This intercom system includes, for example, a power transmission side resonance unit 14 of the base unit 1 and a power reception side resonance unit of the handset 2 each having predetermined resonance frequencies f1 and f2 described below in a near electromagnetic field having a frequency environment of 400 kHz to 20 MHz. The power generated by the main unit 1 is contactlessly supplied to the handset 2 by the magnetic field coupling (electromagnetic field coupling) generated between the terminal 22 and the voice signal for establishing a call. .

  A base unit 1 shown in FIG. 1A includes a microphone 10 and a speaker 11 that are used to establish the above-described call. In addition, the handset 2 shown in the figure is provided with a microphone 20 and a receiver 21 that are used to establish the above-described call.

  Next, a specific structure of the intercom system illustrated in FIG. 1A will be described with reference to a circuit block diagram of FIG.

  1B includes a microphone 10 and a speaker 11 described above, a high-frequency signal generating unit 12, a high-frequency signal amplifying unit 13, a power transmission-side resonance unit 14, and a receiving unit (master unit receiving unit) 15. Is provided.

  In the base unit 1, the high-frequency signal generation unit 12 having the microphone 10 described above generates a high-frequency signal obtained by superimposing a power transmission signal, which is a driving power source of the handset 2, on a voice signal input to the microphone 10 as a transmission voice. It is for generating. The high-frequency signal amplifying unit 13 amplifies the high-frequency signal generated by the high-frequency signal generating unit 12 and sends it out as, for example, a 100 W strong radio signal.

  The power transmission side resonance unit 14 is connected in series with a pickup coil L1 having a condition of the series resonance frequency f1 shown in the equation (1) and a resonance capacitor C1, and the high-frequency signal amplified by the high-frequency signal amplification unit 13 is contactless. Is transmitted to the handset 2, receives a high-frequency signal transmitted from the handset 2 in a non-contact manner, and is a received high-frequency signal that is input to the microphone 20 of the handset 2 as a transmitted voice. Is taken out and sent to the receiver 15.

受話部１５は、送電側共振部１４にて取出される音声信号を受信し、スピーカ１１から受話音声として出力するためのものである。

The receiving unit 15 is for receiving the audio signal extracted by the power transmission side resonance unit 14 and outputting it as the received audio from the speaker 11.

  Here, as a specific connection mode of the base unit 1, the high-frequency signal generation unit 12 is sequentially passed through a high-frequency signal amplification unit 13, a resonance capacitor C 1 connected in series with a power transmission side resonance unit 14, and a pickup coil L 1. The reference potential point is connected. A speaker 11 is connected between the high-frequency signal amplifying unit 13 and the resonance capacitor C 1 of the power transmission side resonance unit 14 via the receiver unit 15.

  In addition, the handset 2 shown in the figure includes the microphone 20 and the receiver 21, the power receiving side resonance unit 22, the rectification unit 23, the constant voltage diode (zener diode) 24, the power storage unit 25, and the transmitter (handset). A transmitter (transmitter) 26 and a receiver (transmitter / receiver receiver) 27 are provided.

  In the transmitter / receiver 2, the power receiving side resonance unit 22 includes a pickup coil L2 and a resonance capacitor C2 having a series resonance frequency f2 condition shown in Expression (2) connected in series, and M pickup coil L2 using electromagnetic induction. In a non-contact manner, the power transmission signal of the high frequency signal from the main unit 1 is taken out and sent to the rectification unit 23, and the reception function of sending the voice signal of the high frequency signal similarly taken out to the reception unit 27 and the transmission to the microphone 20 It has a transmission function for transmitting a voice signal input as voice to the base unit 1 in a non-contact manner as a high-frequency signal.

整流部２３は、受電側共振部２２にて受信される高周波信号の送電信号を直流電源に変換するためのものであり、ダイオードブリッジＤＢにて構成されている。また、定電圧ダイオード２４は、整流部２３にて変換された直流電源をもとに当該ダイオードに逆方向の電流を流すことで、このダイオードの両端に一定の電圧レベルを確保するためのものである。さらに、蓄電部２５は、二次電池等を構成するコンデンサＣ3にて構成され、定電圧ダイオード２４にて確保された一定の電圧レベルの直流電源を、当該送受話器の駆動電源として充電するためのものある。

The rectifying unit 23 is for converting a power transmission signal of a high frequency signal received by the power receiving side resonance unit 22 into a DC power source, and is configured by a diode bridge DB. The constant voltage diode 24 is for ensuring a constant voltage level at both ends of the diode by flowing a reverse current to the diode based on the DC power converted by the rectifier 23. is there. Further, the power storage unit 25 is constituted by a capacitor C3 that constitutes a secondary battery or the like, and is used for charging a DC power source having a constant voltage level secured by the constant voltage diode 24 as a driving power source for the handset. There are things.

  The transmitter 26 is for transmitting a voice signal input to the microphone 20 as a voice to be transmitted to the parent device 1 from the power receiving resonance unit 22 in a non-contact manner as a high frequency signal. The receiving unit 27 is for receiving the audio signal extracted by the power receiving side resonance unit 22 and outputting it as the received audio from the receiver 21.

  Here, as a specific connection mode of the handset 2, one side of the rectification side of the diode bridge DB constituting the rectification unit 23 is connected to one end side of the pickup coil L2 via the resonance capacitor C2 of the power reception side resonance unit 22. The other of the rectification side of the diode bridge DB is connected between the other end side of the pickup coil L2 and the reference potential point. Further, between the (+) terminal and the (−) terminal of the diode bridge DB, a constant voltage diode 24 and a capacitor C3 constituting the power storage unit 25 are respectively connected in parallel. Furthermore, the input side is connected to the microphone 20 between one side of the rectification side of the diode bridge DB and the resonance capacitor C2, and between the other side of the rectification side of the diode bridge DB and the other end side of the pickup coil L2 and the reference potential point. The output side of the transmitted transmitter 26 is connected to the input side of the receiver 27 whose output side is connected to the receiver 21.

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

  1A and 1B, the high frequency signal generation unit 12 of the base unit 1 converts the voice signal, which is the transmission voice of the user of the base unit, input to the microphone 10 by the driving power source of the handset 2. A high-frequency signal (hereinafter, referred to as a master unit high-frequency signal) on which a certain power transmission signal is superimposed is generated. The master high-frequency signal is amplified to a strong radio wave signal of 100 W, for example, via the high-frequency signal amplifier 13. Thereafter, the master high frequency signal amplified via the high frequency signal amplifying unit 13 is transmitted from the power transmission side resonance unit 14 to the power reception side resonance unit 22 of the handset 2 in a non-contact manner. Here, since the power transmission side resonance unit 14 is composed of a pickup coil L1 and a resonance capacitor C1 connected in series as shown in the figure, the series resonance frequency f1 shown in the above equation (1) of the resonance unit 14 is provided. Thus, the current applied to the power transmission signal is maximized.

  Further, the power receiving side resonating unit 22 of the handset 2 is composed of a pickup coil L2 and a resonance capacitor C2 connected in series as shown in the figure, so that it is received in a non-contact manner by the pickup coil L2 using electromagnetic induction. The current applied to the power transmission signal of the main unit high-frequency signal becomes maximum at the series resonance frequency f2 shown in the above-described equation (2) of the resonance unit 22 and is rectified via the diode bridge DB constituting the rectification unit 23. After that, the DC power source in which a constant voltage level is secured via the constant voltage diode 24 can be charged to the capacitor C3 constituting the power storage unit 25.

  With the operation up to this point, according to the handset 2, the power transmission signal taken out by the power reception side resonance unit 22 can be charged to the capacitor C 3 constituting the power storage unit 25 by the resonance current applied to the power reception side resonance unit 22. Therefore, as shown by the solid line (thick solid line) in FIG. 2 (the graph of FIG. 2), the capacitor C3 constituting the power storage unit 25 can be rapidly charged, the time required for charging is shortened, and the charging efficiency is improved. Enhanced.

  Further, the power receiving side resonance unit 22 of the handset 2 takes out a voice signal from the base unit high frequency signal received in a non-contact manner as described above, and sends it to the receiver 21 via the handset unit 27, whereby the base unit 1. Can be output from the receiver 21 as received voice.

  On the other hand, the voice transmitted by the user of the handset 2 is transmitted from the transmitter 20 as a high frequency signal. This high-frequency signal (hereinafter referred to as a handset high-frequency signal) is transmitted from the power-receiving-side resonance unit 22 to the power-transmission-side resonance unit 14 of the base unit 1 without contact.

  The power transmission side resonance unit 14 of the base unit 1 takes out a voice signal, which is a handset high-frequency signal received in a non-contact manner, and sends it to the speaker 11 via the handset unit 15, so that the user of the handset 2 can transmit the speech. Voice can be output from the speaker 11 as received voice.

  As is apparent from the above description, according to the embodiment of the present invention, due to the magnetic field coupling generated between the power transmission side resonance unit 14 of the base unit 1 and the power reception side resonance unit 22 of the handset 2, The power generated in 1 is received by the handset 2 in a non-contact manner as a high-frequency power transmission signal based on the mode of series resonance, so that the resonance frequencies (series resonance frequencies) f1 and f2 relating to this series resonance are obtained. Since the current is maximized, the charging efficiency applied to the power storage unit 25 of the handset 2 is increased. Further, not only can the audio signal be transmitted to the handset 2 by superimposing the high frequency signal on the power transmission signal, but also the audio signal can be transmitted from the handset 2 to the base unit 1. Therefore, a call can be established between the base unit 1 and the handset 2.

  The intercom system of the present invention has been described with a specific embodiment. However, the present invention is not limited to this embodiment, and the system has any configuration known so far as long as the effect of the present invention is achieved. It goes without saying that can also be adopted.

1 …… Base 14 …… Power transmission side resonance part L1 …… Pickup coil C1 …… Resonance capacitor f1 …… Resonance frequency (series resonance frequency)
2 …… Transmitter / receiver 20 …… Mic 21 …… Receiver 22 …… Receiving side resonance part L2 …… Pickup coil C2 …… Resonance capacitor 23 …… Rectification part DB …… Diode bridge 25 …… Power storage part 26 …… Transmission Part 27 …… Receiving part f2 …… Resonance frequency (series resonance frequency)

Claims (4)

Magnetic field generated between the power transmission side resonance unit (14) of the base unit (1) and the power reception side resonance unit (22) of the handset (2) each having a predetermined resonance frequency (f1, f2) in the near electromagnetic field. An intercom system that, by coupling, supplies power generated by the power transmitter to the power receiver in a contactless manner, and transmits and receives audio signals for establishing a call,
The master unit is configured to amplify the high-frequency signal sent from the high-frequency signal generator, the high-frequency signal generator (12) for sending the power transmission signal on which the audio signal is superimposed, and the amplified signal A high frequency signal amplifying unit (13) for transmitting the high frequency signal in a non-contact manner to the power receiving resonator of the power receiver,
The handset includes a rectifying unit (23) for converting a power transmission signal of the high-frequency signal received by the power-receiving-side resonance unit into a DC power source and charging a power storage unit (25) such as a secondary battery. ,
The intercom system, wherein the power reception side resonance unit is configured by a series resonance circuit having a pickup coil (L2) and a resonance capacitor (C2) connected in series.   2. The intercom system according to claim 1, wherein the rectification unit is configured by a diode bridge (DB) connected in parallel to the pickup coil of the power reception side resonance unit.   The handset is connected in parallel to the pickup coil of the power reception side resonance unit, and outputs a high frequency signal received from the power reception side resonance unit from a receiver (21), and also to a microphone (20). The intercom system according to claim 1 or 2, further comprising a transmission / reception unit (26, 27) for transmitting an input audio signal as a high-frequency signal.   The said power transmission side resonance part is comprised by the series resonance circuit which has the pick-up coil (L1) and resonance capacitor (C1) which were connected in series, Any one of Claims 1 thru | or 3 characterized by the above-mentioned. The listed intercom system.

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