CN2433605Y

CN2433605Y - IC card intelligent water meter

Info

Publication number: CN2433605Y
Application number: CN 00226614
Authority: CN
Inventors: 常文恕
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-07-14
Filing date: 2000-07-14
Publication date: 2001-06-06
Anticipated expiration: 2010-07-14

Abstract

The utility model discloses an intelligent water meter with an IC card. A signal of a counting sensor (7) is input into a leg 1 of a microcomputer processor (5) by a count pulse sampling circuit (8); a counter current sensor (10) is arranged in a main pipeline, a circuit thereof is communicated with a leg 15 of the microcomputer processor (5).

Description

The IC-card intellectual water meter

The utility model relates to a kind of IC-card intellectual water meter.

Because the continuous expansion of domestic tap water and other water system and the develop rapidly of urban construction, the user of potable water, GEOTHERMAL WATER, cleaning water also grows with each passing day.But for a long time, China adopts by the special messenger always and checks meter in each user family, the statistics water consumption, the management clearing form of paying dues again by the user, this is waste of manpower not only, difficult management, often be in arrears with expense, bring great difficulty particularly for the estate management of residential quarters.Though Chinese patent also discloses some dissimilar IC-card water meters, but these water meter energy consumptions are big, adopt lithium battery usually, cost an arm and a leg, be difficult for changing.These IC-card water meter circuit of another problem are too complicated, making is difficult, cost is also high, caused the inconvenience of IC-card water meter in promoting, using.

The purpose of this utility model provides that a kind of circuit is simple, cost is lower, energy consumption is little, the IC-card intellectual water meter of dependable performance.

To achieve these goals, the utility model proposes the corresponding techniques solution:

It has a watchcase and display and hummer this IC-card intellectual water meter, it mainly is 1 pin of count pulse sample circuit with the signal input micro processor of sensor for countering, the adverse current sensor is located in the trunk line, and its circuit is communicated with 15 pin of micro processor.

Fig. 1: schematic block circuit diagram of the present utility model.

Fig. 2: circuit theory diagrams of the present utility model.

Below with reference to drawings and Examples the utility model is done an explanation.

As shown in Figure 1 and Figure 2, the utlity model has a waterproof case, battery 1, buffer circuit 2, interior battery 3, battery voltage detection circuit 4, micro processor 5, display 6, sensor for countering 7, count pulse sample circuit 8, hummer 9, adverse current sensor 10, adverse current circuit 11, IC-card seat 13, solenoid valve 14, driving circuit 15 and storer 16 outside in housing, being provided with.

Wherein, the major part micro processor 5 of this circuit is the 16C57 single-chip microcomputer, and it can differentiate various information under the guiding of software, send various instructions, thereby realize forward and reverse counting, demonstration, alarm opening and closing valve, reach the purpose that control is supplied water, cut off the water.Outer battery 1 is made up of 4 No. 5 batteries, as the work energy of this table.Buffer circuit 2 is by diode C ₅, D ₁Be in series, it cuts off inside and outside battery 3,1, reaches the surreptitiously purpose of water to prevent battery in artificial the consumption.Interior battery 3 is the electric capacity of a 16V4700 μ F, and it can transfer to its inside with the portion of energy of outer battery 1, works for safeguarding micro processor 5 outside taking down during battery 1 changing outer battery 1 or people, until closing solenoid valve 14.Battery voltage detection circuit 4 is by integrated package ELM9740CAA, resistance R ₄And diode D ₆, capacitor C ₇, triode V ₁₃Constitute, this circuit is connected on the feeder ear of outer battery 1 all the time, detects the height of cell voltage at any time, and provides the undervoltage alarm signal.Display 6 is by light emitting diode L ₁-L ₅Form resistance R ₂And R ₁₉-R ₂₂For with they corresponding current-limiting resistances, L ₁By triode V ₁₃It is under-voltage to drive alarm, L ₂-L ₅Drive by micro processor 5, show various information with different luminous combinations.Sensor for countering 7 is a magnetoelectricity conversion equipment (being installed in the mechanical water meter), and it provides a pulse with the discharge of each 0.001m.Count pulse sample circuit 8 is by resistance R ₅-R ₇, capacitor C ₂-C ₃, triode V ₁And V ₂Constitute, this circuit can be with the count pulse shaping, filtering interference signals, and the reliability of assurance counting, hummer 9 is a piezoelectric type buzzer, is directly to be driven by micro processor 5, informs the various information of user with voice signal.Adverse current sensor 10 is the sensitive switching device of a magnetic, just sends signal to micro processor 5 when the water adverse current occurring.Deck is by switch S ₁With joint PGM, CARD, RES, CLK, DATA, V ⁺Form, work as S ₁Connect, 17 pin of coupled micro processor 5 receive IC-card and insert the signal of IC-card seat 13 and prepare Card Reader.Driving circuit 15 is by resistance R ₁₁-R ₁₆, triode V ₅-V ₁₀And diode U ₁And U ₂Constitute, control this circuit respectively, can drive solenoid valve 14, thereby realize the unlatching of valve or close by 9,13 pin of micro processor 5.Storer 16 is made of 2402 memory chips.

When the user will pay dues and after the IC-card buied inserts IC-card seat 13, S ₁Connect, micro processor 5 is started working.Table number, password, purchase information such as the water yield and deliver to 11,12,16,17,18 pin of micro processor 5 and 8 pin of storer 16, micro processor 5 carries out calculation process.The card of selling as the non-water supply department of IC-card, or password, when table number is not inconsistent, micro processor 5 is refused to read, micro processor 5 selects circuit to be judged to the card that Fei Benbiao uses, then command display 6 sends signal.If card number, password effectively and card go up water consumption when non-vanishing, micro processor 5 can will be purchased water yield input store 16, display 6 shows the water yields and drives valve, and instruction driving circuit 15 drives solenoid valves 14 and opens valve simultaneously, the user can normal water.

When user's water, sensor for countering 7 is rotated, every 0.001m ³Water consumption provide a pulse signal, and this signal is delivered to impulse sampling circuit 8 carries out shaping, the umber of pulse that will form water consumption by this circuit is delivered to micro processor 5 again and is carried out necessary calculating.Water consumption Deng input is about to use up (less than 3m ³) time, micro processor 5 will show by display 6, and with hummer 9 alarm of ringing, impel the user in time to buy the water yield again and again row import.If the user in time do not purchase water and import the water yield, and the surplus waters in the storer 16 are when being zero, and 5 of micro processors can command display 6 show closes, and drive solenoid valve 14 and close, and stop to supply water to the user.When adverse current appearred in the water when cutting off the water in the water pipe, 10 of adverse current sensors sent signal to micro processor 5 negative computings at this moment.

Battery detection circuit 4 is constantly being monitored the voltage of outer battery 1, when voltage is reduced to 4V owing to use, and this drives display 6 and hummer 9 generation sound, light alarm signal, the prompting user in time more renews battery.When voltage continues to reduce if in time do not change battery, micro processor 5 will send instruction and give driving circuit 15 and close solenoid valve 14.

In order to prevent because of not using for a long time the generation of the stuck or dumb phenomenon that solenoid valve 14 may bring, micro processor 5 can be after the certain water consumption of every consumption under dry situation automatically once with solenoid valve 14 switches.

In this table course of work, the various instructions that micro processor 5 sends with self are incessantly carried out fault test to sensor for countering 7 and solenoid valve 14, and the failure message that occurs is charged to storer 16, and this information is passed to water supply administrative authority through IC-card again.

The utility model has overcome the deficiency described in the background technology, design ingenious, rational in infrastructure, have higher Reliability, and cost is lower, the power consumption few, is convenient to spread and uses. It both can allow the user at any time understand usefulness The regimen condition can make again water supply administrative department grasp user's water meter state. This table also has automatic detection, can bear The characteristics of computing.

Claims

1, a kind of IC-card intellectual water meter, it has a watchcase and display (6) and hummer (9), it is characterized in that 1 pin of count pulse sample circuit (8) with the signal input micro processor (5) of sensor for countering (7), adverse current sensor (10) is located in the trunk line, and its circuit is communicated with 15 pin of micro processor (5).

2, IC-card intellectual water meter as claimed in claim 1, it is characterized in that 6 pin of micro processor (5) and 8 pin with by integrated package ELM9740CAA, triode V ₁₃, diode D ₆, resistance R ₄, capacitor C ₇The battery detection circuit (4) that constitutes connects.

3, IC-card intellectual water meter as claimed in claim 1 is characterized in that 9 pin of micro processor (5) and 13 pin pass through by resistance R respectively ₁₁-R ₁₆, triode V ₅-V ₁₀With diode U ₁, U ₂The driving circuit (15) that constitutes is connected with solenoid valve (14).