CN1187995C - Transmission method and device for implementing wireless monitor in digital mobile communication network - Google Patents

Abstract

The present invention relates to a transmission method and a device thereof for realizing wireless monitoring by a digital type mobile communication network. The device is the existing digital honeycomb type mobile telephone after press keys, the display screen and the ringing unit are removed, the microphone of the device is provided with a high-sensitivity audio amplification circuit, and a double-audio multi-frequency decoding chip is arranged in a leading-in loop. When an incoming call ringing signal is received by the device, a prompting tone of inputting a password is controlled by a CPU to send to the leading-in person firstly. The password input by telephone keys of the leading-in person is decode within preset time, after the password is read to be correct, the high-sensitivity audio amplification circuit is switched on for pickup monitoring on the spot, and monitoring information is transmitted to the leading-in person by a mobile telephone system.

Description

Realize the transmission method and the device of wireless monitor with the digital mobile communication network

The present invention relates to a kind of wireless monitor realization technology, relate to a kind of transmission method and device of realizing wireless monitor with the digital mobile communication networking or rather, this transmission method and device be with digital mobile communication system or DCS mobile communication system as transmission medium, realize monitoring the purpose in a distant place.

The general wireless monitor device that is used to realize function such as antitheft, though the monitoring effect of wireless radio transmission is arranged, but because radio frequency (RF) effective power is generally in the scope of 50M-500M, therefore the disadvantage of this wireless monitor device is to monitor apart from limited, and because of its transmission means is to adopt analog form, thereby very easily eavesdropped by other detection equipment, so the practical application effect of the wireless monitor device that these tradition are used is unsatisfactory.

Main purpose of the present invention, provide a kind of transmission method and device of realizing wireless monitor with the digital mobile communication network, utilize existing digital mobile communication networking, realize wireless monitor, promptly utilize the Digital Transmission networking of existing gsm mobile communication system or DCS mobile communication system,, reach in the distance and wireless monitor is carried out at the scene, as media with it to improve the shortcoming that traditional wireless monitor device is subjected to the transmission range restriction and is easily eavesdropped by being installed in on-the-spot device.

The technical scheme that realizes the object of the invention is such: a kind of transmission method with digital mobile communication network realization wireless monitor is characterized in that comprising following steps:

Bell signal to inlet wire person calling is made auto-pickup:

The inlet wire person is sent the prompt tone of prompting input security password:

In the default time security password that the inlet wire person is imported is compared, when judging that the input password is correct, open the high sensitivity audio amplification circuit, carry out on-site monitoring for the inlet wire person.

The described security password that the inlet wire person is imported compares, and also comprises with double-tone multifrequency (DTMF) decoder integrated chip (IC) password that the inlet wire person is inputed is understood.

Also comprise the external data input port is connected with the communication interface of computer, carry out the change setting of built-in system setting or security password.

The technical scheme that realizes the object of the invention can also be such: a kind of device of realizing wireless monitor with the digital mobile communication network, it is characterized in that: be the digital cellular portable telephone device that does not contain button, display screen and ring unit, comprise central processing unit and the transceiver module that is connected with central processing unit, memory cell, SIM card, dual-tone multifrequency decoder and external data input port at least; In the described transceiver module, what be connected with microphone is a high sensitivity audio amplification circuit.

Device with digital mobile communication network realization wireless monitor of the present invention is based on portable telephone device, and the high sensitivity audio amplification circuit is set again, picks up on-the-spot source of sound.

The device of realizing wireless monitor with the digital mobile communication network of the present invention, in the inlet wire loop of portable telephone device, set up a double-tone multifrequency (DTMF) decoding integrated chip (IC), thereby be configured for understanding the user utilizes telephone key-press to input from a distant place DTMF password, and as differentiating the whether basis of safety of inlet wire.

The device of realizing wireless monitor with the digital mobile communication network of the present invention, in the CPU (CPU) of portable telephone device, the auto-pickup parts are set, for auto-pickup incoming call bell signal, and can be unidirectional the inlet wire user is sent the prompt tone that please import security password.

Transmission method with digital mobile communication network realization wireless monitor of the present invention only after the inlet wire user inputs correct password, could be opened the high sensitivity audio amplification circuit, with the confidentiality of guaranteeing to monitor.

The device of realizing wireless monitor with the digital mobile communication network of the present invention, be to utilize existing digital GSM or code division multiple access (CDMA) or mobile communication system such as PHS or DCS to make transmission medium, and utilize DTMF decoding, control and have only incoming call and just start sound pick up equipment when safe.Device of the present invention can be mobile phone or a mobile phone of removing parts such as telephone key-press, display screen, ring unit.

Further specify technology of the present invention below in conjunction with embodiment and accompanying drawing.

Fig. 1 is traditional standard GSM mobile handset schematic block circuit diagram.

Fig. 2 is a monitoring device schematic block circuit diagram of the present invention.

Fig. 3 is high sensitivity audio amplification circuit figure of the present invention.

Fig. 4 is a snoop-operations main flow block diagram of the present invention.

Among Fig. 1 to Fig. 4, button 11, display screen 12, ring unit 13, antenna 15, transceiver module 16, CPU 17, SIM card slot 18, audio amplification circuit 21, the DTMF IC 22 that decodes, external data input port 23, step-down rectifier unit 24, power subsystem 25.

Referring to Fig. 1, be the gsm mobile telephone schematic block circuit diagram of a standard, mainly comprise power subsystem 25, antenna 15, transceiver module 16, central processing unit (CPU) 17, LCD display 12, font ROM 14, keyboard matrix circuit 11, SIM card slot 18 and ring unit 13.

Simultaneously referring to and comparison diagram 1, Fig. 2, as can be known, device of the present invention is with traditional portable telephone device shown in Figure 1, external interfaces such as the button 11 of removal standard, LCD display 12, ring unit 13 and font ROM, keep remaining as antenna 15, transceiver module 16, CPU 17 and SIM card (subscriber identity module) slot 18, so the basic structure of apparatus of the present invention is a lower powered aerogram transmitter and receiver, just the mobile phone standard of still being formulated according to GSM alliance realizes after the improvement local interface.So it is at aspects such as SIM card and RF transmitting power, digital signal compilings, equal standards of still following GSM alliance to be formulated, so the SIM card slot 18 of this machine also is the open trough position partly, still can in GSM cellular based communication service network, do normal online registration after inserting SIM card in it, and enter normal holding state.That is the present invention can use after need inserting SIM card voluntarily by the user, and its SIM card is bought acquisition by the user to cellular based communication service company.

As shown in Figure 2, device of the present invention connects a high sensitivity audio amplification circuit 21 on the microphone of mobile phone, to improve pickup sensitivity, and in the inlet wire loop of mobile phone, set up DTMF decoding IC 22 in addition, it can be separated read the DTMF sign indicating number that the user imports with telephone key-press from a distant place, and make mobile phone after inserting SIM card, because of this portable telephone device does not have button, and become the portable telephone device of can only wiring and can't dial outward, the function of CPU 17 is then changed into and can be come electric signal by auto-pickup, but just connecting incoming call is not temporarily opened audio amplification circuit 21, earlier unidirectional sends prompt tone to the inlet wire user, import security password with prompting inlet wire user, can be as the inlet wire user with the correct password of telephone key-press input in the default time, then monitoring device is opened high sensitivity amplifying circuit 21, utilizes phone to make on-the-spot pickup in the distance for the inlet wire user and monitors.

Referring to Fig. 3, high sensitivity audio amplification circuit of the present invention, as shown in the figure, this circuit is provided with an operational amplifier OP07, one input is connected to microphone MIC1 by capacitor C 1, and the acoustic scene tone signal that makes monitoring is delivered to audio output after the preposition amplification of operational amplifier OP07, also be connected with transistor Q1 on this audio output, this transistor Q1 is the switch that opens and closes this audio amplification circuit.

In conjunction with referring to Fig. 2, Fig. 4, be main operation flow process of the present invention.Step 401 is to 404, and device is after monitoring bell signal, and the auto-pickup calling just wouldn't be opened audio amplification circuit 21, and only unidirectional the inlet wire person sent prompt tone, and the person imports security password with the prompting inlet wire.

Step 405 is to 407, and when the password errors number of failing to input proper password or input as the inlet wire person in the default time surpassed pre-determined number, then control system was cut off automatically; Step 405,408,409 has been imported proper password and work as the inlet wire person in Preset Time, just can open high sensitivity audio amplification circuit 21, monitors for the inlet wire person, and the person hangs up the telephone until inlet wire.

By aforesaid transmission method, the mobile phone standard words end transmission method that former GSM alliance is formulated, can be divided into two kinds of normal transmission pattern and non-transmission modes (DTX), the present invention can improve to monitor quality, ad hoc is the normal transmission pattern, because during with the DTX mode transfer, be that speed with 13KBIT/S is to speech coding when the user gives orders or instructions, and when not giving orders or instructions rate coding with about 500BIT/S, though so can reduce consumption to electric energy, but can reduce the monitoring quality, so the present invention is opposite with general commercially available standard gsm mobile telephone preset state, its DTX transmission mode is preset as closes (OFF).

Because mobile phone of the present invention has not had key device, the change of required security password when the setting of its built-in system or inlet wire, all finish,, it is carried out the change of built-in function setting or security password for example with computer RS-232 communication interface line by attached external data input port 23.

The present invention divides into external power supply and the collocation battery uses two kinds of patterns, wherein, during as the long-time standby of need, can place the external power supply state, civil power behind step-down, rectifying device 24 and the input supply unit 25, and because the present invention has not had button, display screen and ring unit after simplifying, its volume can obviously dwindle, but so commonly used electrical equipment of disguise as or insert electrical equipment inside, as many jack types power extending line, power failure lighting device, electronic alarm clock etc., and the external power source of shared this electrical equipment simultaneously, the purpose that reaches long-time standby and monitor at any time.

In sum, the present invention with the digital communication networking as transmission medium, the problem of the no traditional limited aspect of wireless monitor device service range, and its transmission means is digital but not analog, can make information pass through digital encoding and encryption fully, increase confidentiality, make general audiomonitor can't carry out interception.

Claims (3)

1, a kind of transmission method with digital mobile communication networking realization wireless monitor may further comprise the steps:

Bell signal from supervision side is made auto-pickup;

Send the caution sound of prompting input security password to supervision side;

The comparison security password that supervision side imported is wherein understood the password that the side of supervision inputed with a double-tone multifrequency decoder in the default time;

When password is correct, open the high sensitivity audio amplification circuit by a transistor switch, for carrying out on-site monitoring in supervision side.

2, according to the transmission method of claim 1, it is characterized in that, also comprise by the external data input port being connected, carry out the change setting of built-in system setting or security password with the dataphone mouth with digital mobile communication networking realization wireless monitor.

3, a kind of device with digital mobile communication net realization wireless monitor comprises:

Remove the digital cellular or the portable telephone device of button, display screen and ring unit, comprised central processing unit and the transceiver module that is connected with central processing unit, memory cell, SIM card, dual-tone multifrequency decoder and external data input port at least;

Wherein, described transceiver module connection one has the high sensitivity audio amplification circuit of transistor switch;

Wherein, described dual-tone multifrequency decoder is understood according to the password of prompt tone input monitoring root, sends into central processing unit then and compares;

When password is correct, open the high sensitivity audio amplification circuit by a transistor switch, for carrying out on-site monitoring in supervision side.

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