CN2785056Y - Wireless meter-copying equipment - Google Patents
Wireless meter-copying equipment Download PDFInfo
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- CN2785056Y CN2785056Y CN 200420105466 CN200420105466U CN2785056Y CN 2785056 Y CN2785056 Y CN 2785056Y CN 200420105466 CN200420105466 CN 200420105466 CN 200420105466 U CN200420105466 U CN 200420105466U CN 2785056 Y CN2785056 Y CN 2785056Y
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- modulation
- wireless meter
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Abstract
The utility model discloses a wireless meter reading device which comprises a transmitting device, wherein the transmitting device comprises a data collecting circuit, a modulation circuit and a transmitting circuit. The data collecting circuit carries out counting and coding to a pulse signal input by a practical meter, and stores and output a digital signal; the modulation circuit directly modulates the transmitting frequency of the transmitting circuit by using the digital signal; the transmitting circuit transmit a frequency signal which is already modulated in a wireless way; the modulation circuit and the transmitting circuit are formed from discrete components. The wireless meter reading device also comprises a receiving device, and the receiving device comprises a receiving circuit and a demoding circuit; a CC1020 wireless radio-frequency receiving and transmitting chip is preferred by the receiving circuit. Because the modulation circuit and the transmitting circuit are formed from the discrete components, the cost is reduced, and the requirement for application can be fully met; the structure of the whole body of the device is simple, the cost is low, and the realization is easy; the transmitting circuit can be realized by adopting a plurality of simple and mature modules, the structure is simple, the performance is stable and reliable, and the utility model is favorable to the further reduction of the cost; the utility model has the advantages of simple structure, low cost and reliable performance.
Description
[technical field]
The utility model relates to a kind of transmission system of measuring-signal, specifically relates to a kind of wireless meter-copy device.
[background technology]
Along with rapid development of economy in recent years, people's quality of life improves constantly, and quick and easy life style becomes general needs, and trival matters such as the checking of three tables, charge are often brought a lot of troubles in the life.At present the meter reading method that uses mainly contains: manually read the tabular value charge of valuating again, this mode not only all wastes time and energy for user, billing unit, and mistake and dispute appear easily, it is accurate, light, convenient to be difficult to accomplish, and has seemed very incompatible to the society that the network information direction is advanced day by day now; Be exactly that this mode need often be changed card, frequently looks into expense etc. in some local IC-card note expense mode of using in addition; Though modes such as radio meter register, network meter reading were also once proposed, because the cost height, equipment complexity and technology imperfection and can't really use and promote.Its emission, receiving trap generally all adopt integrated chip to realize in the existing wireless meter-copy device, and in actual applications, because the quantity of emitter is far longer than the quantity of receiving trap, and its functional requirement is relative wants simple many, and the integrated chip that therefore all use costs an arm and a leg, function is various says it is the dual waste of cost and function to a great extent.
[summary of the invention]
The purpose of this utility model is the wireless meter-copy device that proposes a kind of simple in structure, with low cost, easy realization.
The technical scheme that realizes above-mentioned purpose is: a kind of wireless meter-copy device, comprise emitter, and described emitter comprises data acquisition circuit, modulation circuit and radiating circuit; Data acquisition circuit is counted, is encoded the pulse signal of practicality table input, storage and output digital signal; Modulation circuit uses the digital signal of input directly the transmission frequency of radiating circuit to be modulated; Frequency signal after radiating circuit will be modulated sends out with the radio form; Described modulation circuit and radiating circuit adopt discrete component to constitute.
Described radiating circuit can preferably such structure: comprise oscillatory circuit, frequency multiplier, frequency selector, amplifying circuit, match circuit and antenna; Modulation circuit carries out frequency modulation (PFM) to the vibration that oscillatory circuit produces, the signal frequency multiplication after frequency modulation (PFM) that frequency multiplier will be imported, the output higher hamonic wave, frequency selector carries out bandpass filtering to the higher hamonic wave of input with certain centre frequency, amplifying circuit amplifies filtered signal, and the signal after the amplification is coupled to antenna and is launched by antenna through match circuit.
This wireless meter-copy device also comprises receiving trap, described receiving trap comprises receiving circuit and decoding circuit, receiving circuit receives the radio signal that aforementioned emitter sends, convert it to and the corresponding signal output of the coded digital signal of described data acquisition circuit output, decoding circuit carries out data transmission by communication line after this signal is decoded in the mode corresponding with cataloged procedure in the emitter.
The preferred overtone crystal oscillatory circuit of described oscillatory circuit.
This wireless meter-copy device also can comprise control circuit, and the power supply of described control circuit control modulation circuit and radiating circuit when needs carry out making power connection when data send, then makes power supply disconnect when not sending.
Described data acquisition circuit can use MCU; Described MCU counts, encodes the pulse signal of the practicality table of input, storage and output digital signal, described MCU and the command signal of whether carrying out the data transmission to described control circuit output.
Described radio meter register emitter also can comprise power converting circuit; Described control circuit is given modulation circuit and radiating circuit power supply through power converting circuit, and described power converting circuit is stabilized in a fixed value with the voltage of control circuit output.
The preferred CC1020 radio transceiver of described receiving circuit chip.
Described communication line is telephone wire or network.
The utility model adopts technique scheme, beneficial technical effects is: 1) adopt discrete component to constitute modulation circuit and radiating circuit, greatly reduce cost and can fully satisfy the needs of using, make the device one-piece construction simplify, with low cost, realize easily and promote; 2) adopt several simple and ripe modules can realize radiating circuit, simple in structure and stable and reliable for performance and help further reducing cost; 3) owing to generally all be (for example every month once) of carrying out at interval to the data statistics of practicality table and transmission, therefore the employing of control circuit, make the power supply that need not to carry out to turn-off when data transmit modulation and radiating circuit in the overwhelming majority, greatly reduce energy consumption, prolonged the serviceable life of equipment; 4) adopt power converting circuit to come stabilized supply voltage, can prolong the serviceable life of supplying cell; 5) carry out the transmission of signal in warbled mode, realize simple, good reliability; 6) adopt CC1020 radio transceiver chip to cooperate the radiating circuit of discrete component formation as receiving circuit, its with respect to traditional receiving circuit not only cost reduced, and frequency stability is fine, therefore the frequency drift of transmitting terminal has receded into the background for receiving end, can simplify the design of radiating circuit and transmission data that can be more reliable, farther.The utility model has good popularizing application prospect with simple circuit configuration, cheap cost, reliable performance.
[description of drawings]
Below by embodiment also in conjunction with the accompanying drawings, the utility model is described in further detail:
Fig. 1 is the emitter circuit structure block diagram of wireless meter-copy device.
Fig. 2 is a kind of concrete circuit element structural drawing of Fig. 1.
Fig. 3 is the receiving trap circuit structure block diagram of wireless meter-copy device.
Fig. 4 is a kind of concrete circuit element structural drawing of Fig. 3.
Fig. 5 is that wireless meter-copy device is installed and used synoptic diagram.
[embodiment]
A kind of wireless meter-copy device in conjunction with Fig. 1 to Fig. 4, comprises emitter, and described emitter comprises MCU, control circuit, modulation circuit, power converting circuit and radiating circuit; Described radiating circuit comprises overtone crystal oscillatory circuit, frequency multiplier, frequency selector, amplifying circuit, match circuit and antenna.Also comprise receiving trap, described receiving trap comprises receiving circuit that adopts CC1020 radio transceiver chip and the decoding circuit that adopts the 2nd MCU.
MCU reads the practical pulse of showing output by the I/O mouth, and it is counted, encodes, and storage is the output digital signal also, described MCU and the command signal of whether carrying out the data transmission to described control circuit output.Modulation circuit directly uses the digital signal of input that frequency modulation (PFM) is carried out in the vibration that the overtone crystal oscillatory circuit produces; The signal frequency multiplication after frequency modulation (PFM) that frequency multiplier will be imported, the output higher hamonic wave, frequency selector carries out bandpass filtering to the higher hamonic wave of input with certain centre frequency, amplifying circuit amplifies filtered signal, and the signal after the amplification is coupled to antenna and is launched by antenna through match circuit.Described control circuit is given modulation circuit and radiating circuit power supply through power converting circuit, when needs carry out making power connection when data send, power supply is disconnected.Described power converting circuit is stabilized in a fixed value with the voltage of control circuit output.
The radio signal that emitter sends is received after C1 is coupled to the RF-IN (19 pin) of CC1020 by antenna, CC1020 converts it to and the corresponding signal output of the coded digital signal of data acquisition circuit output, the decoding program of decoding circuit by inside carries out data transmission by communication line after this signal is decoded in the mode corresponding with cataloged procedure in the emitter
In this example: 1) pulse of practical table output is produced with closed by tongue tube S1, S2 disconnection over the ground, when the pointer (carrying magnetic) of practicality table forwards near tongue tube, the tongue tube closure, when the pointer (carrying magnetic) of practicality table forwarded to away from tongue tube, tongue tube disconnected.2) crystal of overtone crystal oscillating circuit is operated in about 86MHz.3) because frequency multiplier is the harmonic component of choosing, when the number of times of harmonic wave high more, the amplitude of harmonic signal is just low more, so the concussion frequency of crystal and frequency multiplier to choose overtone order all suitable, the signal of 86MHz that frequency multiplier makes oscillating circuit concussion in this example reaches about 430MHz carrier frequency through 5 frequencys multiplication.Therefore 4) because the harmonic component after the frequency multiplication is very abundant, add the bandpass filter that center frequency point is 433MHz, i.e. frequency selector, it has＞inhibition of 30dBm other harmonic component.5) amplifying circuit is amplified to 5 subharmonic of frequency selector output about 10mW.6) modulation circuit adopts BFSK (Binary Frequency Shift Keying) modulation system, directly make digital signal that carrier signal is carried out frequency modulation (PFM) by varactor DC1 frequency modulation, and the frequency component of the modulation signal of this moment is many especially, modulation band-width and noise have been increased, thereby introduced wave filter (by the C11 among Fig. 3, C14, R7 forms), to reduce the frequency component of modulation signal, carrier signal is after ovennodulation, its amplitude substantially constant is constant, its frequency changes along with data-signal, has used buffer circuit (by the R8 among Fig. 3 between MCU and the back polar circuit simultaneously, Q2, R32 forms).7) power converting circuit mainly is in order to prolong the serviceable life of battery, when its input 1.8～3.6V voltage, to be output as constant 3.3V.8) control circuit is in order to control the power supply of power converting circuit, radiating circuit, modulation circuit, when MCU will be by 25 pin when modulation circuit sends data, from 2 pin output low levels, make the Q1 conducting by R5, R1, earlier for power converting circuit, radiating circuit, modulation circuit provide power supply.After the MCU data distribute, 2 pin output high level, Q1 turn-offs, and this moment, way circuit only consumed tens uA; Also can adopt the sleep mode that MCU is set to wait the circuitry consumes that reduces when not sending data in addition.
The digital metering signal output that data acquisition circuit will obtain can be intermittent, by programming to determine the time interval or the rule of this output, such as, be standard with time, weekly or carried out a secondary data in every month and send and transmit; Perhaps, be standard with the consumption, secondary data transmission and transmission are carried out in every use one ton (a cube) etc.; These can be determined according to actual needs.
Wireless meter-copy device in the foregoing description can be installed and used according to form shown in Figure 5, several emitters are connected with the practical epiphase of some unit resident family, the concentrated collector that receiving trap places floor to be provided with is concentrated after the centralized data processing that collector sends emitter by telephone wire or Network Transmission to the supply unit.
Claims (10)
1, a kind of wireless meter-copy device comprises emitter, and described emitter comprises data acquisition circuit, modulation circuit and radiating circuit; Data acquisition circuit is counted, is encoded the pulse signal of practicality table input, storage and output digital signal; Modulation circuit uses the digital signal of input directly the transmission frequency of radiating circuit to be modulated; Frequency signal after radiating circuit will be modulated sends out with the radio form; It is characterized in that: described modulation circuit and radiating circuit adopt discrete component to constitute.
2, wireless meter-copy device according to claim 1 is characterized in that: described radiating circuit comprises oscillatory circuit, frequency multiplier, frequency selector, amplifying circuit, match circuit and antenna; Modulation circuit carries out frequency modulation (PFM) to the vibration that oscillatory circuit produces, the signal frequency multiplication after frequency modulation (PFM) that frequency multiplier will be imported, the output higher hamonic wave, frequency selector carries out bandpass filtering to the higher hamonic wave of input with certain centre frequency, amplifying circuit amplifies filtered signal, and the signal after the amplification is coupled to antenna and is launched by antenna through match circuit.
3, wireless meter-copy device according to claim 1, it is characterized in that: also comprise receiving trap, described receiving trap comprises receiving circuit and decoding circuit, receiving circuit receives the radio signal that described emitter sends, convert it to and the corresponding signal output of the coded digital signal of described data acquisition circuit output, decoding circuit carries out data transmission by communication line after this signal is decoded in the mode corresponding with cataloged procedure in the emitter.
4, wireless meter-copy device according to claim 2, it is characterized in that: also comprise receiving trap, described receiving trap comprises receiving circuit and decoding circuit, receiving circuit receives the radio signal that described emitter sends, convert it to and the corresponding signal output of the coded digital signal of described data acquisition circuit output, decoding circuit carries out data transmission by communication line after this signal is decoded in the mode corresponding with cataloged procedure in the emitter.
5, according to claim 2 or 4 described wireless meter-copy devices, it is characterized in that: described oscillatory circuit adopts the overtone crystal oscillatory circuit.
6, according to any described wireless meter-copy device of claim 1～4, it is characterized in that: also comprise control circuit, the power supply of described control circuit control modulation circuit and radiating circuit when needs carry out making power connection when data send, then makes power supply disconnect when not sending.
7, wireless meter-copy device according to claim 5 is characterized in that: also comprise control circuit, the power supply of described control circuit control modulation circuit and radiating circuit when needs carry out making power connection when data send, then makes power supply disconnect when not sending.
8, wireless meter-copy device according to claim 6 is characterized in that: described data acquisition circuit comprises MCU; Described MCU counts, encodes the pulse signal of the practicality table of input, storage and output digital signal, described MCU and the command signal of whether carrying out the data transmission to described control circuit output.
9, wireless meter-copy device according to claim 6 is characterized in that: also comprise power converting circuit; Described control circuit is given modulation circuit and radiating circuit power supply through power converting circuit, and described power converting circuit is stabilized in a fixed value with the voltage of control circuit output.
10, according to claim 3 or 4 described wireless meter-copy devices, it is characterized in that: described receiving circuit adopts CCl020 radio transceiver chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420105466 CN2785056Y (en) | 2004-12-01 | 2004-12-01 | Wireless meter-copying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420105466 CN2785056Y (en) | 2004-12-01 | 2004-12-01 | Wireless meter-copying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2785056Y true CN2785056Y (en) | 2006-05-31 |
Family
ID=36772022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420105466 Expired - Lifetime CN2785056Y (en) | 2004-12-01 | 2004-12-01 | Wireless meter-copying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2785056Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105719466A (en) * | 2016-04-29 | 2016-06-29 | 邹平县供电公司 | Remote meter reading system based on power distribution system |
| CN105788219A (en) * | 2016-04-29 | 2016-07-20 | 邹平县供电公司 | Remote meter reading system with high anti-interference performance and low bit error rate |
| CN105784290A (en) * | 2016-03-10 | 2016-07-20 | 上海万寅安全环保科技有限公司 | Audio detection apparatus |
-
2004
- 2004-12-01 CN CN 200420105466 patent/CN2785056Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784290A (en) * | 2016-03-10 | 2016-07-20 | 上海万寅安全环保科技有限公司 | Audio detection apparatus |
| CN105719466A (en) * | 2016-04-29 | 2016-06-29 | 邹平县供电公司 | Remote meter reading system based on power distribution system |
| CN105788219A (en) * | 2016-04-29 | 2016-07-20 | 邹平县供电公司 | Remote meter reading system with high anti-interference performance and low bit error rate |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141201 Granted publication date: 20060531 |