(1) the feasibility study 
     Power supply enterprise is facing the broad electricity customers, especially after the implementation of a home in a table, the residents of the emerged a large number of customers These customers to pay the electricity power supply bureau business hall, the charge for personnel to manually locate in the middle of the large amount of electricity bills, if it weren't for that month electricity is much more time-consuming to toll collectors to manual, the information of clients on electricity bills, such as door number charge date charge amount input computer, not only a waste of time, there is a big error rate In the national power system, push forward the high-quality service, whether to extend the customer waiting time or some mistakes are not allowed Therefore, convenient and quick accurate barcode technology was applied to charge link appears very important .
(2) there is a problem 

      Bar code application is produced by a bar code symbol design and the implementation of the automatic identification system scan read three steps to complete In these three parts, only the barcode production with electricity bills it is difficult to print .

(3) the solution of the problem

     Specific bar code to generate and print to roughly the following several ways:

     ①Application of special barcode printer 

      ②Use of barcode printing control realized by programming

    ③The bar code as graphics through program output to the common printer

    ④Using barcode fonts

      The following analysis of the above methods:

      ①Which has the function of barcode printing printer usually more expensive than ordinary printer, which makes the system is not the economy, at the same time, in the print position on issues such as operation is more complicated.

      ②Print controls can be found from various channels, free or not free, but these controls in addition, the use of inconvenient problems also exist in the print on the page setup.

      ③Completely through the program design output barcode will involve more complex programming language knowledge, in addition to the required programmers have higher programming knowledge on the program is running and maintenance also has great difficulty.

      ④Using barcode fonts are among the most relatively easy to implement, but also the most economic by comparison, with the application of bar code font charge system and with less programming to implement the bar code printing the most economical and convenient.

      (4)  The specific realization method :

      Electricity receipt of bar code, should be on the basis of the complete data to simple Therefore, we must first to electricity, summarized the receipt of the information on finishing Among them, the date of electricity in customers door number and electricity bills receivable amount is necessary to charge system, but also meet the needs of the charge.

      Second, determine the principle of coding On coding principles we use to represent Numbers and letters, and the most widely applied in the field of management standard 39 (CODE39 yards) through the above analysis, the electricity on the receipt before the bar code is composed of digital can meet the needs of the use of four for the date period, by the year of two and two months after; 5 to 12 them roughly, namely the actual door number of customers; 13th to 17th, for the amount of electricity bills receivable amount expanding formed after 100 times, less than zero padding in the front of the five That has a total of 17 bar code, and in the bar code before and after each with a "*" identifier can form standard size 39 in barcode Numbers, each number can be adjusted according to actual situation of data source and digital formats, meet the needs of different situations.

      Third, after the bar code printing bar code is prepared, you can implement first of all, in a paper to print the program design in accordance with the principle of the formation of a bar code field, and then the contents of the bar code field in the design of the report into the right barcode fonts, again to font size can be slightly adjusted It should be pointed out that, bar code printing should be clear as far as possible, try to bright color also and this will greatly improve the barcode recognition rate.