CN101038697B - RF modem used in family network system - Google Patents
RF modem used in family network system Download PDFInfo
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- CN101038697B CN101038697B CN2005101224509A CN200510122450A CN101038697B CN 101038697 B CN101038697 B CN 101038697B CN 2005101224509 A CN2005101224509 A CN 2005101224509A CN 200510122450 A CN200510122450 A CN 200510122450A CN 101038697 B CN101038697 B CN 101038697B
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Abstract
The invention relates to a RF (radio frequency) modem of radio communication device used in a home network system. The modem is composed of a power source portion which communicates an electric apparatus and an outer power source, and provides an outer voltage after being changed as a certain work voltage; a radio transceiver transmitting and receiving information in a radio manner; a communication portion communicated with a control unit in the electric apparatus; a micro-processor which controls the radio transceiver and the communication portion by supplying power from the power source portion to output signals by the radio transceiver after the communication portion receives information of the control unit, and output signals to the control unit by the communication portion after the radio transceiver receives the information.
Description
Technical field
The present invention relates to radio communications set, particularly relate to RF (radio frequency) modulation-demodulation device of the radio communications set of used in family network system.
Background technology
At present, within the family or the home automation of far distance automatic controlling household electrical appliance almost reached the universalization stage.The home automation at initial stage is in the level of utilizing phone or infrared ray to control each electrical equipment separately, can not constitute contact between each electrical equipment.But, be to utilize communicator between household electrical appliance, to set up network now, and carry out unified management by the controller of controlling these networks.
Fig. 1 is the synoptic diagram of general domestic network system.As shown in the figure, home network is meant that multiple digital household appliances interconnects, no matter can both enjoy facility, safety and economy ground service for life at any time at indoor and outdoors.
Under the background that such home network occurs, be referred to as the development digitizing gradually along with digital information processing such as the refrigerator of white domestic appliances and washing machine, and, on this basis, because the fast development of the household electrical appliances application system technology and the high-speed multimedia communication technology etc. makes refrigerator and washing machine etc. occur with the novel information man electromorphs of integrated these technology.
Here, the IT network is meant and is that PC and the network type of message exchange or Internet service etc. between the device on every side, AV network are the network types between the household electrical appliance of exchange audio or video information.And living network [living network] is that to control household electrical appliance simply as home automation or remote measurement be the network that purpose is set up, and can be made of refrigerator, washing machine, micro-wave oven, electric warning horn, air conditioner and phone etc.
The domestic network system that constitutes in such family comprises: the electrical equipment main equipment [master device] that can control other electrical equipment runnings and monitor [monitoring] operating state; Has the electrical equipment slave unit [slave device] that the requirement of main equipment is given a response function and notice oneself state change information function according to the opering characteristic of electric apparatus and other factors.The electrical equipment that adopts in this instructions is not only the household electrical appliance for above-mentioned living network service such as washing machine, refrigerator, but also can be included as the household electrical appliance of IT network and the service of AV network.
In the domestic network system in the past like this, the network that PC PC is installed is taked the mode carrying out the function of tonic chord and control indivedual electrical equipment by electric wire.In the domestic network system, the network media within doors uses electric wire.But in communication process, if noise [noise] is arranged on these electric wires, the stability that information transmits obviously descends.And, connect on the electric wire when loading in addition, the unstable power in the electric wire, appearance can not be transmitted the problem of information glibly.
Summary of the invention
The present invention proposes for the shortcoming that solves above-mentioned prior art, and its purpose is, a kind of radio modem that adopts the domestic network system application of easy processing noise is provided.
And, another object of the present invention is to, the radio modem of the high used in family network system of the irrelevant information transmission stability of a kind of and load variations (number change of electrical equipment) within doors is provided.
In order to achieve the above object, the formation of RF modem used in family network system of the present invention comprises: conducting electrical equipment and external power source, and external voltage become the power supply unit that provides after a certain size operating voltage; Carry out the transceiving portion that information transmits and receives with wireless system; The Department of Communication Force of communicating by letter with electrical equipment inner control portion; From the power supply unit turn-on power with control transceiving portion and Department of Communication Force, and receive from Department of Communication Force after the information of control part by transceiving portion output signal, and after the transceiving portion reception information by the microprocessor of Department of Communication Force to the control part output signal.
Here, transceiving portion formation comprises: antenna; The receiving cable of RF (radio frequency) signal from the transmission of sky alignment transceiver; The RF signal from the transmission channel of transceiver to antenna transmission; Under transceiver control, make receiving cable be connected the switch of antenna with the transmission channel selectivity; The information that modulation receives from microprocessor and generate certain RF signal, then by transmission channel to antenna transmission, and be demodulated into the transceiver of definite information after receiving the RF signal by receiving cable to the microprocessor transmission; The oscillator of the signal that clocks is provided to transceiver.
In addition, receiving cable and transmission channel include match circuit separately.
Receiving cable also comprises promising minimizing noise and the low noise amplifier of amplification RF signal.
Microprocessor is according to the reiving/transmitting state control low noise amplifier of information.
Transmission channel also includes and makes the wave filter of RF signal through the certain frequency zone.
Transceiving portion also includes in transceiver modulation and/or separates timing, and is fixing or revise the phase locked loop filter of the tracer signal phase place of the oscillator that produces the carrier frequency that transceiver uses.
Above-mentioned carrier frequency is 424.7MHz.
The present invention has noise processed and is easy to effect, and obtains and the irrelevant stable higher the effect of information transmission of load variations within doors (electrical equipment number change).
Description of drawings
Fig. 1 is the synoptic diagram of general domestic network system.
Fig. 2 is the domestic network system structural drawing that is suitable for radio modem of the present invention.
Fig. 3 is the structural drawing of RF modem used in family network system of the present invention.
Fig. 4 is the embodiment of the transceiving portion of Fig. 3.
Accompanying drawing major part description of symbols
10,40: electrical equipment 11,41: control device
12,42: electric wire 13,43: signal wire
20: modulator-demodular unit [modem] 21: power supply unit
22: microprocessor 23:RS-232
30: transceiving portion
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Fig. 2 is the domestic network system structural drawing that adopts modulator-demodular unit of the present invention.
As shown in Figure 2, domestic network system comprises the electrical equipment 10,40 (main device [master device] and/or slave unit [slave device]) of carrying out original function and the electric wire 100,101,102 that electric power is provided to these electrical equipment 10,40.
In detail, electrical equipment 10 comprises: connect the control device 11 that power supply drives by electric wire 101; Be connected turn-on power by electric wire 12 with electric wire 101, with the modulator-demodular unit 20 that carries out RF communication after control device 11 exchange messages.Modulator-demodular unit 20 is to be connected by signal wire 13 to communicate by letter with control device 11.Modulator-demodular unit 20 can adopt internally-arranged type or externally positioned type, as shown in the figure, direct conducting external ac power source (for example, 220V) provide working power (for example, 3V or 5V), and can be from the power supply of control device 11 conducting rectifications or transformation.
Here, control device 11 is for carrying out the device of electrical equipment 10 original functions, is the general name that includes power supply and control part (not shown) etc.Therefore, modulator-demodular unit 20 carries out RF communication, and can also carry out the relevant information processing of calcaneus rete network management (for example, setting coding, transmitting-receiving glitch [dummy signal], the transmission mistake of detected transmission signal etc.) alone.At this moment, to control and/or the electrical equipment 10 state confirmations relevant information laggard line correlation information processing of control device 11 transmission with electrical equipment 10.
Corresponding therewith, electrical equipment 40 also has identical structure, and carries out RF communication between modulator-demodular unit 20 and the modulator-demodular unit 50.Therefore, independent transmission medium need not be installed indoor, so can reduce erected cost etc.In addition, in domestic network system, work, in the wireless communication process, can not increase load, so the stability in the transmission course rises even be equipped with many electrical equipment of modulator-demodular unit.
Fig. 3 is the structural drawing of used in family network system radio modem of the present invention.As shown in the figure, modulator-demodular unit 20 of the present invention comprises: from electrical equipment 10 outside conducting external ac power source, then external power source is converted to direct supply (for example, power supply unit 21 5V) by electric wire 12; Transmit the information that receives from control device 11 by RF communication to other electrical equipment,, carry out the microprocessor 22 of relevant control alone with network to the output information of control device 11 other electrical equipment of transmission; For the network between microprocessor 22 and the control device 11 connects by universal asychronous receiver transmitter (UART:Universal Asynchronous Receiver/Transmitter) transitional information and receive and send messages walk communication interface (RS-232) 23; Reception is converted to the RF signal after by microprocessor 22 information transmitted, transmit to other electrical equipment then, and after the RF conversion of signals that receives from other electrical equipment to transceiving portion 30 that microprocessor 22 transmits.
In detail, alternating current by electric wire 12 input external power sources of power supply unit 21 (for example, 220V), rectification and transformation for specify big small voltage (for example, 5V) after, the whole members that need power supply to modulator-demodular unit 20 in are powered.Here, electric wire 12 is to be connected on the electric wire 101, and electric wire 101 is to be connected on the electric wire 100 by socket (not shown).That is, electrical equipment 10 has a plug (not shown), is combined in turn-on power on the socket according to plug, and the power supply of conducting supplies to 21 li of power supply units by electric wire 12.Therefore because the power supply (not shown) of power supply unit 21 and control device 11 separates, between the power consumption of the power consumption of modulator-demodular unit 20 and control device 11 without any influence.In addition, modulator-demodular unit 20 is designed to have the structure of multiple power consumption.
Microprocessor 22 transmits transceiving portions 30 information transmitted to control device 11, and to the information of transceiving portion 30 transmission from control device 11 receptions, makes above-mentioned information transmission to other electrical equipment 40.In addition, microprocessor 22 is differentiated transceiving portions 30 information transmitted contents, can also be independent of control device 11 and handle these information (for example, information) directly related with network management.Here, what be provided as information communication between microprocessor 22 and control device 11 walks communication interface (RS-232) 23, and walks communication interface (RS-232) 23 and connect with signal wire 13, so play the function of receiving and sending messages between them.
And, the transceiving portion 30 that carries out the wireless communication informational function comprises: by modulating the output information of microprocessor 22 and generate the RF signal according to the mode of appointment, and export to transmission channel for transmit above-mentioned RF signal to other electrical equipment, and the RF signal that receives from other electrical equipment by receiving cable according to the mode demodulation of appointment, then to the RF transceiver 31 of microprocessor 22 transmission demodulating informations; The oscillator 32 of the hour entry of assigned frequency is provided to RF transceiver 31; Fix or revise PLL (PhaseLoc-ked Loop, the phaselocked loop) wave filter 33 of carrier frequency-phase.
In addition, the formation of transceiving portion 30 also comprises: the match circuit 34 that minimizes transmission RF signal amplitude mistake and/or phase error; Make the transmission channel of the RF output signal of coupling through LC wave filter 35 formations in assigned frequency zone; Reduce the low noise amplifier (Low Noise Amplifier:LNA) of noise when amplifying the RF received signal; The receiving cable that constitutes by the match circuit 39 of the amplitude mistake of the RF received signal that minimizes amplification and/or phase error.In addition, also comprise switch 36 in order to select in transmission channel and the receiving cable one to be connected and in transmission course or receiving course, to operate with antenna 37.
In detail, RF transceiver 31 operates according to clocking of oscillator 32, the information that receives from microprocessor 22 is modulated to depends on the designated carrier frequency that clocks, and generate the RF signal, and the match circuit 34 to transmission channel transmits then.And gauge tap 36 makes transmission channel be connected with antenna 37, and the RF signal that generates is passed through antenna 37 wireless radio transmission.In addition, RF transceiver 31 is not operating switch 36 when microprocessor 22 receives information, receiving cable is connected, under the situation that receives the RF signal by antenna 37, receive the RF signal from match circuit 39, the RF signal is demodulated into depends on the designated carrier frequency that clocks and generate transmission information, then the information that generates to microprocessor 22 transmission.Here, the carrier frequency of the carrier frequency during transmission when receiving can be identical, also can be inequality.
Here, in order to improve the serviceability of quartz crystal, oscillator 32 adopts has the temperature compensating crystal oscillator [Temperature Compensated X-stal Oscillator:TCXO] that temperature-compensation circuit restriction output frequency changes according to temperature change.The reference frequency that clocks that above-mentioned RF transceiver 31 reception oscillators 32 generate (as, 19.68MHz), the carrier frequency of generation certain frequency (as, 424.7MHz), the modulation or demodulate information (at this moment, RF transceiver 31 uses pulse-electric pressure converter, and is not shown).But the reference frequency instability if these clock, the carrier frequency of its output frequency are also unstable.Therefore, transceiving portion 30 also comprises the phase place of the promising reference frequency that fixedly clocks or by specifying size to revise the phase locked loop filter 33 of the reference frequency phase place that clocks exactly.
Above-mentioned match circuit the 34, the 39th, whole impedance [impedance] coupling, but be that energy minimization produces wrong circuit on the amplitude of RF received signal and RF transmission signals and phase place.
In addition, the LC wave filter 35 that constitutes transmission channel together with match circuit 34 is that the combination by inductor and capacitor constitutes, play the carrier frequency of filtering transmission information (as, 424.7MHz) or comprise the function in the assigned frequency zone of these carrier frequencies.
In addition, switch 36 makes transmission channel and antenna 37 form a loop [Path] when the RF signal transmits according to the control signal of RF transceiver 31, when the RF signal receives, make receiving cable and antenna 37 form a loop in addition, transmit thus and receive the RF signal.Here, antenna 37 uses spirality (Helical) antenna.
Then, because of be subjected to from the RF voltage of signals that receiving cable receives reduce and influence level [Level] such as noise very low, so be necessary to amplify.But,, need to be equipped with the low noise amplifier LNA38 that possesses the minimum noise enlarging function because the RF signal is the RF signal that comprises a lot of noises from the outside.Above-mentioned LNA38 regulation working point and match point [matchingpoint] make NF (noise figure) low.In addition, above-mentioned LNA38 is that the control according to microprocessor 22 comes work, therefore is installed as cut-out in order to carry out above-mentioned control function from the independent switch (not shown) of power supply unit 21 to the LNA38 power supply.In addition, above-mentioned switch operates according to the control of microprocessor 22, energized or cut off the electricity supply, and control LNA38 carries out work.
Fig. 4 is the embodiment of the transceiving portion circuit diagram of Fig. 3.
As shown in the figure, RF transceiver 31 is by connection terminal 1,2,3,7,8,9,32 ' connect with microprocessor 22, and by connection terminal 10 ' receive the reference frequency that clocks from oscillator 32.Above-mentioned RF transceiver 31 is chip form, and according to modulation of the program in the chip and demodulation RF signal.
Above-mentioned RF transceiver 31 is by terminal 5,31 ' connect with power supply unit 21, the conducting direct supply, and the direct supply of supplying with by terminal 12 ', 13 ', 18,20 ', 22 ', 23 ', 24 offer the parts that need power supply.
In addition, PLL wave filter 33 is to connect the circuit that is made of R10, R12, C27, C30, C34 by heel end 24,28.
In addition, match circuit 34 is by being connected terminal 21 ' go up the circuit that is made of R4, C15, L2, and the LC wave filter 35 that is connected on the match circuit 34 is made of L4, C25, C24 circuit, is connected on the switch 36.
Above-mentioned switch 36 is connected on the terminal 14,15 of RF transceiver 31, carries out the RF signal according to terminal 14 output control signal uRxC and receives, and carry out the transmission of RF signal according to terminal 15 output control signal uTxC.The terminal 5 of switch 36 connects with antenna 37, and the control signal that receives according to terminal 14,15 makes terminal 5 heel ends 1 or terminal 3 conductings.
In addition, LNA38 is made of circuit L1, R6, Q2, and forms promising in LNA38 control powered switch Q1.Above-mentioned switch Q1 powers and cuts off the electricity supply to LNA38 thus according to the output control signal uEnLNA closure/disconnection of microprocessor 22.Above-mentioned LNA38 connects the match circuit 39 that is made of circuit L3, C17, and above-mentioned match circuit 39 is connected on the terminal 19 of RF transceiver 31.
In addition, the circuit that is made of B11, R11, C35～C40 of lower end, right side is the circuit that stops noise.
Claims (7)
1. RF modem used in family network system comprises: conducting electrical equipment and external power source, and external voltage become the power supply unit that provides after a certain size operating voltage; Carry out the transceiving portion that information transmits and receives with wireless system; The Department of Communication Force of communicating by letter with electrical equipment inner control portion; From the power supply unit turn-on power with control transceiving portion and Department of Communication Force, and receive from Department of Communication Force after the information of control part by transceiving portion output signal, and after the transceiving portion reception information by the microprocessor of Department of Communication Force to the control part output signal;
It is characterized in that described transceiving portion constitutes and comprises: antenna; The receiving cable of RF signal from the transmission of sky alignment RF transceiver; The RF signal from the transmission channel of RF transceiver to antenna transmission; Under the control of RF transceiver, make receiving cable be connected the switch of antenna with the transmission channel selectivity; The information that modulation receives from microprocessor and generate certain RF signal, then by transmission channel to antenna transmission, and be demodulated into the RF transceiver of definite information after receiving the RF signal by receiving cable to the microprocessor transmission; The oscillator of the signal that clocks is provided to the RF transceiver.
2. RF modem used in family network system according to claim 1 is characterized in that described receiving cable and transmission channel include match circuit separately.
3. RF modem used in family network system according to claim 2 is characterized in that, receiving cable also comprises promising minimizing noise and the low noise amplifier of amplification RF signal.
4. RF modem used in family network system according to claim 3 is characterized in that, microprocessor is according to the reiving/transmitting state control low noise amplifier of information.
5. RF modem used in family network system according to claim 2 is characterized in that, transmission channel also includes and makes the wave filter of RF signal through the certain frequency zone.
6. RF modem used in family network system according to claim 1, it is characterized in that, transceiving portion also includes in RF transceiver modulation and/or separates timing, and is fixing or revise the phase locked loop filter of the tracer signal phase place of the oscillator that produces the carrier frequency that the RF transceiver uses.
7. RF modem used in family network system according to claim 1 is characterized in that, the carrier frequency that the RF transceiver uses is 424.7MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101224509A CN101038697B (en) | 2006-03-18 | 2006-03-18 | RF modem used in family network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101224509A CN101038697B (en) | 2006-03-18 | 2006-03-18 | RF modem used in family network system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038697A CN101038697A (en) | 2007-09-19 |
| CN101038697B true CN101038697B (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101224509A Expired - Fee Related CN101038697B (en) | 2006-03-18 | 2006-03-18 | RF modem used in family network system |
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| Country | Link |
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| CN (1) | CN101038697B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6131136A (en) * | 1997-12-12 | 2000-10-10 | Gateway 2000, Inc. | Dual mode modem for automatically selecting between wireless and wire-based communication modes |
| CN1417659A (en) * | 2001-11-06 | 2003-05-14 | 三星电子株式会社 | Portable computer |
| US20040073620A1 (en) * | 2002-10-10 | 2004-04-15 | Lg Electronics Inc. | Home network system for generating random number and method for controlling the same |
| US20040157544A1 (en) * | 2002-11-25 | 2004-08-12 | Moon Kyeong Ho | Home network system |
| US20040235519A1 (en) * | 2003-05-20 | 2004-11-25 | Agere Systems Inc. | Wireless communication module system and method for performing a wireless communication |
-
2006
- 2006-03-18 CN CN2005101224509A patent/CN101038697B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6131136A (en) * | 1997-12-12 | 2000-10-10 | Gateway 2000, Inc. | Dual mode modem for automatically selecting between wireless and wire-based communication modes |
| CN1417659A (en) * | 2001-11-06 | 2003-05-14 | 三星电子株式会社 | Portable computer |
| US20040073620A1 (en) * | 2002-10-10 | 2004-04-15 | Lg Electronics Inc. | Home network system for generating random number and method for controlling the same |
| US20040157544A1 (en) * | 2002-11-25 | 2004-08-12 | Moon Kyeong Ho | Home network system |
| US20040235519A1 (en) * | 2003-05-20 | 2004-11-25 | Agere Systems Inc. | Wireless communication module system and method for performing a wireless communication |
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| Publication number | Publication date |
|---|---|
| CN101038697A (en) | 2007-09-19 |
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Granted publication date: 20100922 Termination date: 20170318 |