CN2489311Y

CN2489311Y - Non-contact IC card pre-payment watermeter

Info

Publication number: CN2489311Y
Application number: CN 00266836
Authority: CN
Inventors: 汪健生; 陆良
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-21
Filing date: 2000-12-21
Publication date: 2002-05-01
Anticipated expiration: 2010-12-21

Abstract

The utility model relates to a non contact IC card type prepayment water meter. Flowmeter fo the water meter is integrated with a control valve door; and the flowmeter and the control valve door are connected to a controller through a control line. Wherein, the measuring circuit of the controller consists of a sixteen A/D switch and a voltage regulator circuit. The control circuit consists of a SCM; and an IC read circuit consists of a RF receiving circuit and a base station. The utility model has the advantages as follows: the controller of the water meter can be installed far away from the water meter, thus facilitating users; the non contact IC read manner avoiding the defects as damping, man made attack, uncertain work and data loss; moreover, the communication interface of the water meter can be used in remote collective read and control.

Description

The non-contact IC card prepay water meter

The utility model relates to flow measurement instrument, particularly a kind of non-contact IC card prepay water meter.

Along with The development in society and economy, China's water resource becomes to present day by day and lacks, and nearly all city all exists water shortage problem, and in big and medium-sized cities, this phenomenon is particularly outstanding.Therefore, water saving becomes one and social development and the closely-related problem of people's lives.The prepay water meter that a kind of people's of raising consciousness of saving water is arranged in the prior art, but, be easy to cause bayonet socket to make moist because it adopts the mode of Contact Type Ic Card, artificial attack waits the unreliable problem of work.

The purpose of this utility model is intended to overcome the shortcoming of prior art and proposes a kind of safe in utilization, reliable, easy to operate non-contact IC card prepay water meter.

The purpose of this utility model can realize by following proposal.

The non-contact IC card prepay water meter, by the watermeter flowing rate meter, by-pass valve control and controller are formed.Its watermeter flowing rate meter and by-pass valve control combine as a whole, and watermeter flowing rate meter, by-pass valve control link by control line and controller.The metering circuit of its middle controller by 16 A/D change, mu balanced circuit forms, and signal delivered to control circuit.Control circuit is made up of single-chip microcomputer, and it accepts free RF transmit-receive circuit, the IC-card read/write circuit of base station composition and the information of counter, and the control by-pass valve control.

Below in conjunction with embodiment of the present utility model and accompanying drawing, the non-contact IC card prepay water meter is described in detail.

Fig. 1 non-contact IC card prepay water meter structural representation;

Fig. 2 non-contact IC card prepay water meter schematic diagram.

The non-contact IC card prepay water meter is identical with the general structure of Contact Type Ic Card prepay water meter, all is made up of watermeter flowing rate meter 1, by-pass valve control 3, controller 2.Its watermeter flowing rate meter and by-pass valve control combine as a whole, and watermeter flowing rate meter, by-pass valve control link by control line and controller.The metering circuit of non-contact IC card prepay water meter controller by 16 A/D change, mu balanced circuit forms, the signal of metering circuit output is delivered to control circuit, and metering circuit output measurement data is delivered to communication port.Control circuit is made up of single-chip microcomputer, it accepts free RF transmit-receive circuit, the IC-card read/write circuit of base station composition and the information of counter, and control by-pass valve control, in addition, control circuit also connects one and shows liquid crystal, show that liquid crystal is fixed on the controller, but the integrated flow of its display water-meter, surplus water, valve working state.It also has low electric alarm function.When the voltage of battery in the controller is lower than a certain numerical value, hummer in the controller also will be reported to the police and be changed battery with the prompting user, continue use and do not change battery as the user, when cell voltage is lower than a certain numerical value, control circuit in the controller cuts out by-pass valve control, want to continue to use water meter as the user, must change battery.

The principle of work of non-contact IC card prepay water meter is: in the IC-card with the forward purchasing water yield and other user profile that the user will buy by administrative authority was placed on apart from the controller certain distance, the IC-card radio frequency read/write circuit in the controller was just to sticking into row identification and read-write automatically.After the information of confirming to be read and write, the forward purchasing water yield in the IC-card is read in the single-chip microcomputer in the controller and this information stored automatically, by control circuit by-pass valve control to be opened simultaneously, this moment, water meter was in opening.As the current water meter of flowing through, the sensor of installing on the water meter just reaches controller with electric impulse signal.By constantly accepting the pulse signal from flowmeter, the single-chip microcomputer in the controller becomes flow by the A/D conversion with number conversion in the arteries and veins of receiving, the electric pulse number of accepting along with controller constantly increases, and the flow of the accumulative total in the single-chip microcomputer also adds up gradually.The integrated flow of the storage water yield in the single-chip microcomputer (the forward purchasing water yield) with actual measurement subtracted each other, just can obtain the real surplus water yield in the water meter.Also reach communication port during this information of same, can be used for remote centralized meter-reading and control.Along with the continuous increase of the watermeter flowing rate of flowing through, the surplus water of controller device single-chip microcomputer constantly reduces, and when surplus water reduced to a certain value, the hummer in the controller was purchased water with the alarm user.Continue to use and do not purchase water as the user, when being zero to the interior surplus water of table, the control circuit in the controller then cuts out by-pass valve control.Need use again as the user, must purchase water with IC-card by administrative authority.So repeatedly, the user can constantly use IC-card to buy the water yield from administrative authority, reaches the purpose of water, and administrative authority also can carry out management of the use of water easily by user's the water information of purchasing.

The non-contact IC card pre-payment has the following advantages: the controller of (1) water meter can be far away Therefore dried up table is user-friendly to, and especially is installed in the water of special position for some Table, the advantage of this structure is particularly outstanding; (2) because the read-write of the IC-card of contactless water meter Be non-contacting, thereby avoided many drawbacks of Contact Type Ic Card, as the making moist of bayonet socket, Artificial attack, work is unreliable, data are lost etc., therefore, the non-contact IC card water meter tool Very high reliability is arranged, can be suitable for the place special with some. In addition, non-contact IC The communication interface of card prepay water meter can also be copied and control as the teletransmission collection, as with the property pipe Reason or banking system link etc.

Claims

1 one kinds of non-contact IC card prepay water meters are made up of watermeter flowing rate meter, by-pass valve control, controller, it is characterized in that watermeter flowing rate meter and by-pass valve control combine as a whole, and watermeter flowing rate meter, by-pass valve control link by control line and controller; The metering circuit of its middle controller by 16 A/D change, mu balanced circuit forms, and signal delivered to control circuit; Control circuit is made up of single-chip microcomputer, and it accepts free RF transmit-receive circuit, the IC-card read/write circuit of base station composition and the information of counter, and the control by-pass valve control.

2 according to the described water meter of claim 1, it is characterized in that the metering circuit output measurement data of said controller is delivered to communication port.

3 according to the described water meter of claim 1, it is characterized in that the control circuit of said controller connects a demonstration liquid crystal.