Multi-user power-driven terminal

A technology for power consumption terminals and multi-users, which is applied in the direction of special billing meters, identification cards with codes or activation of credit cards, etc., which can solve problems such as easy deciphering and low security of data operation

Inactive Publication Date: 2004-12-15
上海英孚特电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no special encryption protection circuit, no special DES algorithm pr

Method used

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Embodiment Construction

[0035] The principle block diagram of the best implementation mode of the present invention is shown in Fig. 5, and Fig. 11 is a circuit diagram of a specific embodiment. In FIG. 11 , the electronic circuit is divided into several areas by dotted lines, corresponding to the same numbered circuit blocks in FIG. 5 . Wherein electric energy metering unit (8), circuit breaker (3) and power supply (7), (10) are all products or circuits well known to technicians, and backup power supply (11) is exactly a lithium battery, which is omitted and not drawn in the circuit diagram, the first ( 3) The part is the drive circuit of the circuit breaker (3). Microprocessor (1) is a single-chip microcomputer whose model number is 8751 and belongs to 8051 series. It has 4K memory, and its memory can be expanded to 64K in the same series depending on the needs of practical applications. The program of the present invention can be written by a programmer, and can be solidified into the ROM by the ...

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PUM

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Abstract

The present invention discloses a pre-payment electricity supply control equipment, in particular, it relates to a multi-user electricity consumption terminal. It includes electric energy metering unit, circuit breaker, microprocessor, medium card reading/writing device, clock calendar circuit, nonvolatile memory, photoelectric isolator, enciphered protection circuit, man-machine interface circuit, display and state indicator. In the microprocessor, the electricity-consumption processing program, user's card processing program and zero point meter-recording and electric charge chock rate processing program are setup. Said invention can make several user alternatively uss electricity, and possesses stong resistance against attack, good electromagnetic compatibility and data operation safety and reliability.

Description

(1) Technical field [0001] The invention relates to a prepaid power consumption control device, in particular to a multi-user power consumption terminal. (2) Background technology [0002] At present, the prepaid electricity control devices both at home and abroad are part of the prepaid electricity meter. These power consumption control devices can only measure electric energy for a specific user and control power consumption according to the power purchase input by the specific user's media card due to the reason of the target of use. The input of multiple power purchases for the same specific power purchase media card can only be accumulated in the machine, and cannot be stored separately, nor can any input power purchase be "undone" and written back to the original user on the machine It is stored in the media card, that is to say, it cannot be traded on-site on the plane. The current power consumption control device of the prepaid watt-hour meter stores the data in th...

Claims

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Application Information

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IPC IPC(8): G01R11/56G07F7/08
Inventor 汪健
Owner 上海英孚特电子技术有限公司
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