CN201215685Y

CN201215685Y - Wireless water meter actively transmitting data and preventing collision

Info

Publication number: CN201215685Y
Application number: CNU2007200574425U
Authority: CN
Inventors: 姜贞勇; 方勇; 周科; 戴青云; 李红卫; 胡子潜
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-25
Filing date: 2007-09-25
Publication date: 2009-04-01
Anticipated expiration: 2017-09-25

Abstract

The utility model discloses an electronic water meter which can prevent collision and can actively and wirelessly transmit data, which comprises a water meter electronic circuit which is formed by an ATMEGA singlechip, a wireless transmitting-receiving chip CC1020, a PIC singlechip which can automatically arouse a control power switch in timing, a water-meter intelligent counter, a battery, an antenna, a power control circuit and the like. The intelligent counter of the water meter does not work at mean time. When the timing time of the PIC singlechip reaches, the PIC singlechip supplies electricity for the water meter. The ATMEGA singlechip gathers reading values of the counter, which transmits data to detect other wireless water meters before sending data, if other water meters transmit data, and the water meter waits till no other data are transmitted in air, and then, the water meter begins to transmit data by the CC1020. The ATMEGA singlechip notifies the PIC singlechip to cut off a power supply after data are finished transmitting, and the timing circuit itself of the PIC singlechip does not cut off the power supply, which restarts timing again.

Description

A kind of anti-wireless watermeter that initiatively sends data that collides

Technical field

The utility model relates to a kind of wireless watermeter, is specifically related to a kind of smart electronics water meter that also initiatively sends water meter water quantity information by wireless mode.

Background technology

Present water meter, have direct-reading by manual metering, have by the RS485 interface water meter is focused on by wiring to check meter in the somewhere or check meter by wireless (CDMA, GPRS) again, also have water meter to be undertaken by wireless mode directly that poll checks meter.First kind of situation is that the meter reading personnel makes a copy of data message on the paper and transcribes in the system again; Second kind of situation relatively saves trouble and checks meter without paper but need wiring, and bigger engineering cost is arranged, and trouble is installed; The third situation water meter power consumption is bigger, and battery life is short, needs often to change battery, and the user also feels trouble.Water meter market has been enriched in the existence of these water meters, but in this link of checking meter, does not also reach perfect.Overcome the above problems, be workout cost problem, engineering problem, automatic data logging problem, power saving etc., just need a kind of outage at ordinary times of design, timing wake-up sends the water meter of data of water meter, and this water meter is after being waken up, whether have other water meters sending data, just will solve data and send anti-problem of colliding if also will differentiate.

Summary of the invention

The utility model is a smart electronics water meter that active wireless sends data of can preventing colliding.Its gordian technique is: data such as the water consumption of water meter are the intermittent active transmissions of carrying out, and receive these data of water meter again by receiving trap; What initiatively the data that send were used is wireless mode, adopts the wireless data transmission technology of ISM band 433MHz to carry out.

For realizing above-mentioned functions, the utility model is waken up by ATMEGA single-chip microcomputer, radio transmitting and receiving chip CC1020, self-timing and the PIC single-chip microcomputer of power cutoff, water meter table number are that the table digital-to-analogue number conversion of numeral and high-energy battery, antenna, control power remove circuit etc. partly constitute its principle assumption diagram such as Fig. 1 by mechanical switch.

Taked self-timing wake-up switch mechanism during the utility model energising work, the water meter mechanical part contains intelligent counter and ATMEGA single-chip microcomputer, radio transmitting and receiving chip CC1020, disconnects working power at ordinary times, to save electric energy.PIC single-chip microcomputer timing circuit is power cutoff not, and the power supply of being responsible for whole water meter Circuits System cut-offs control.

The PIC single-chip microcomputer timing in switch outage source arrives when self-timing wakes up also, then give ATMEGA single-chip microcomputer and all circuit supplies thereof, intelligent counter is started working, the ATMEGA single-chip microcomputer carries out the data acquisition of counter, and the analog to digital conversion by ATMEGA single-chip microcomputer inside is with the intelligent counter simulation value, change into digital signal, pass through wireless transmission by radio transmitting and receiving chip CC1020 again, realize radio meter register.

Simultaneously, whether ATMEGA single-chip microcomputer and radio transmitting and receiving chip CC1020 detect sending data other wireless watermeters, when existing other water meters to send data, this table is then waited for, send up to other data of aerial nothing, this table just begins to send data, has guaranteed data integrity and validity, is the anti-collision that data wireless sends.

Data send and finish, and the ATMEGA single-chip microcomputer then notifies the PIC single-chip microcomputer to carry out power remove.Restart regularly, the time arrives when undetermined, and then energising wakes entire circuit up once more.

By above scheme, the utility model adopts the wireless data transmission technology of ISM band 433MHz, possesses following characteristics:

1,, data of water meter regularly is wirelessly transmitted to data sink, and can be with in the direct import system database of data, it is artificial to have saved checking meter by directly reading, has improved work efficiency.

2, wireless data transmission, cable wiring manufacture that need not be numerous and diverse, and can realize checking meter with no paper at all.

3, rational data transmit mechanism at intermittence effectively avoid wireless data to send conflict, and power consumption is little, the battery long service life.

Description of drawings

Fig. 1 is a theory structure block diagram of the present utility model.

Embodiment

Line relation of the present utility model is with reference to Fig. 1.

This utility model is a civil equipment, and wireless watermeter is by the intermittent power supply of high-energy battery.Link to each other by the IO mouth between ATMEGA single-chip microcomputer and PIC single-chip microcomputer, whether the PIC single-chip microcomputer decides entire circuit to power by IO mouth control power remove circuit, closes electricity and then sends information to the PIC single-chip microcomputer by the ATMEGA single-chip microcomputer, is closed by the PIC single-chip microcomputer again.Its Switching Power Supply control is carried out by control power remove circuit.

In the utility model, the mechanical reading of water meter converts digital signal to through the AD of ATMEGA single-chip microcomputer translation interface after being simulated data (being intelligent counter) by electric conversion.

In the utility model, wireless transceiver circuit is made of the wireless arrowband of the micropower chip based on the CC1020 of ISM band, links to each other by TXD, RXD and IO mouth between ATMEGA single-chip microcomputer and radio transmitting and receiving chip CC1020.Wherein antenna is a single antenna, and it is received and dispatched all by the CC1020 chip controls.

In the utility model, the water meter mechanical part contains intelligent counter, do not work at ordinary times, when the automatic timing circuits wakeup time of PIC single-chip microcomputer management to and opening power after, ATMEGA single-chip microcomputer and all circuit supplies thereof, intelligent counter is started working, single-chip microcomputer reads the numerical value of intelligent counter, and numerical value sent into the analog to digital conversion circuit of single-chip microcomputer, and data conversion is become digital signal, pass through wireless transmission by radio transmitting and receiving chip CC1020 again.Simultaneously, between ATMEGA single-chip microcomputer and the radio transmitting and receiving chip CC1020 whether other wireless watermeters are detected sending data, when existing other water meters to send data, this table is then waited for, send up to other data of aerial nothing, this table just begins to send data.Data send and finish, and the ATMEGA single-chip microcomputer then notifies the PIC single chip circuit to carry out power remove.PIC single-chip microcomputer timing circuit itself is power cutoff not, restarts regularly, and the time arrives when undetermined, and then energising wakes entire circuit up once more.

One of gordian technique of the present utility model is to have utilized the wireless transport module of 433MHz of international ISM band as the data transmission media of water meter, to data of water meter carry out timing initiatively erosion control hit extraneous the transmission.The use of this gordian technique, be expected to wireless watermeter in use in market more really, hommization more.

Claims

1, a kind of anti-wireless watermeter that initiatively sends data that collides, it is characterized in that: this utility model comprises ATMEGA single-chip microcomputer (1), radio transmitting and receiving chip CC1020 (2), self-timing wakes up and the PIC single-chip microcomputer (3) of power cutoff, water meter table number are the table digital-to-analogue number conversion (7) of numeral and high-energy battery (5), antenna (6), control power remove circuit (4) by mechanical switch, wherein, link to each other by the IO mouth between ATMEGA single-chip microcomputer (1) and PIC single-chip microcomputer (3); With link to each other by TXD, RXD and IO mouth between radio transmitting and receiving chip CC1020 (2), meter reading carries out being linked into after AD changes the AD translation interface of ATMEGA single-chip microcomputer (1) by showing digital-to-analogue number conversion (7), and whether PIC single-chip microcomputer (3) decides entire circuit to power by IO mouth control power remove circuit (4).

2, wireless watermeter according to claim 1 is characterized in that: carry out wireless transmission water meter information between described ATMEGA single-chip microcomputer (1) and radio transmitting and receiving chip CC1020 (2); Whether ATMEGA single-chip microcomputer (1) is detected sending data other wireless watermeters before sending data, and when existing other water meters to send data, this table waits for that then up to other data transmissions of aerial nothing, this table just begins initiatively to send data.

3. wireless watermeter according to claim 1, it is characterized in that: water meter is timed and wakes energising up, ATMEGA single-chip microcomputer (1) is undertaken after the wireless transmission data finish by radio transmitting and receiving chip CC1020 (2), ATMEGA single-chip microcomputer (1) notice PIC single-chip microcomputer (3) carries out power remove, the power supply of PIC single-chip microcomputer (3) timing circuit own is worked all the time and is restarted regularly, treat that timing arrives once more, then again entire circuit is switched on.

4. wireless watermeter according to claim 1, it is characterized in that: water meter is no power at ordinary times, treat that PIC single-chip microcomputer (3) timing arrives and to after the entire circuit energising, the A/D convertor circuit that the water meter mechanical data is sent the simulated data of meter reading into ATMEGA single-chip microcomputer (1) by table digital-to-analogue number conversion (7) carries out analog to digital conversion.