JPH0475175A - Circuit wiring information generation system - Google Patents

Abstract

PURPOSE:To decrease the man-hours of printed wiring board design and to decrease misdesigns by setting current values in necessary connection wiring parts of circuit connection data and calculating wiring conductor width automatically from the current values. CONSTITUTION:This system consists of an input/output device 1, an arithmetic processor 2, a data storage device 3, and a connection information generating mechanism 4. Then the system includes a circuit connection data file wherein current values corresponding to respective connection wiring parts are set previously as conductor width other than standard conductor width with the values of currents to flow and stored as the circuit connection data. Furthermore, the system includes a data file for calculation where data for calculating conductor width corresponding to the current values are stored previously, means 42 and 43 which calculate the conductor width of the corresponding wiring parts by using the data for calculation when the current values are set, and means 42 and 43 which employ the standard conductor width unless the current values are set. Consequently, the connection conductor width can be determined automatically according to the values of currents flowing through the width of connection conductors and misdesigns are reducible.

Description

TECHNICAL FIELD The present invention relates to a circuit wiring information generation system, and more particularly to a circuit wiring information generation system that generates a wiring pattern on a printed wiring board from circuit connection information.

Prior Art This type of conventional circuit wiring information generation system is installed between a circuit diagram manual system that generates circuit connection data and a printed wiring board design system, and generates actual wiring conditions from the circuit connection data. It has the function of transmitting the information to the printed wiring board design system. The wiring conditions do not take into consideration the number of conductor widths of each connection wiring section, and therefore the connection wiring pattern width is currently determined manually on a printed wiring board design system.

Therefore, in the printed wiring board design process, not only a large amount of manpower is required, but also defects in the width of the wiring conductor may occur due to mistakes, and furthermore, there may be omissions in setting.

Purpose of the Invention Therefore, the present invention has been made to solve the drawbacks of the conventional ones, and its purpose is to automatically determine the width of the connecting conductor according to the flowing current value. The purpose of the present invention is to provide a circuit wiring information generation system that provides the following information.

Composition of the Invention According to the present invention, there is provided a circuit wiring information generation system for generating wiring pattern information on a printed wiring board from circuit wiring data, in which each connection wiring that should have a conductor width other than the standard conductor width depending on the flowing current value. A circuit connection data file in which current values corresponding to the respective parts are set in advance and stored as the circuit connection data, and a calculation data file in which calculation data for calculating the conductor width with respect to the current value is stored in advance. , means for calculating a conductor width of a corresponding connection wiring portion using the calculation data if the current value is set;
There is obtained a circuit wiring information generation system characterized in that it includes means for setting the conductor width to the standard conductor width if the current value is not set.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic block diagram showing the system configuration of an embodiment of the present invention. This embodiment is composed of an input/output device 1, an arithmetic processing device 2, a data storage device 3, and a connection information generation mechanism 4.

The information generation mechanism 4 includes a connection information manual section 4 that reads circuit connection data input from the input/output device 1, a wiring pattern information generation section 42 that generates wiring pattern information from the input circuit connection data, and a wiring pattern information generation section 42 that generates wiring pattern information from the input circuit connection data. It includes a wiring conductor width determination unit 43 that calculates and determines the conductor width of the wiring portion, and a connection information output unit 44 that outputs each information about the determined wiring conductor width and wiring pattern.

FIG. 2 is a flowchart showing the operation of the embodiment of the invention shown in FIG. Circuit connection data is stored in advance in the circuit connection data file 5, and a current value corresponding to each connection wiring section data that requires a conductor width other than the standard conductor width due to the flowing current is set in advance. shall be taken as a thing.

From this data file 5, circuit connection data is manually inputted by the input/output device 1 (step 411), and wiring pattern information is generated (step 421).

Since the generation of this wiring pattern information is a well-known technique, its explanation will be omitted here.

Next, it is determined whether a current value is set for each individual connection wiring data (step 51).

If the current value is not set, the conductor width is set to the standard width (step 53). This standard width is a standard value determined in advance depending on the type of printed wiring board or circuit.

If it is determined that the current value has been set, a necessary conductor width corresponding to the current value is calculated (step 52).

A calculation data file 55 is provided in which calculation data for calculating the conductor width is stored in advance. Examples of data in the calculation data file 55 include data representing the conductor thickness determined by the layer structure and manufacturing technology of the wiring board, and data representing the allowable current value per reference area of the conductor. Based on these calculation data, the conductor width corresponding to the set current value is automatically calculated according to a predetermined calculation formula.

Next, processing is performed to convert the calculated conductor width so that it becomes data in a format that can be recognized and processed by the printed wiring board design system (step 54). At this time, the standard wiring width data file 56 also applies to the connection wiring section that has a standard width.
The standard width value is read from , and the same conversion process is performed.

Finally, connection information output processing (step 441) is performed using a conventional well-known method, and board connection data 6 for the printed wiring board design system is generated and output.

Effects of the Invention As described above, according to the present invention, a current value is set for each necessary connection wiring part in circuit connection data, and the wiring conductor width is automatically calculated according to this current value. Therefore, it is possible to significantly reduce the number of man-hours and design errors in printed wiring board design.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the system blocks in FIG. Explanation of symbols of main parts 5...Circuit connection data file 43...
Wiring conductor width determining unit 44...Connection information output unit

Claims (1)

[Claims] (1) A circuit wiring information generation system that generates wiring pattern information on a printed wiring board from circuit wiring data,
A circuit connection data file in which a current value corresponding to each connection wiring portion that should have a conductor width other than the standard conductor width depending on the flowing current value is set in advance and stored as the circuit connection data, and a conductor width corresponding to the current value. a calculation data file in which calculation data for calculating the current value is stored in advance; a means for calculating the conductor width of the corresponding connection wiring portion using the calculation data if the current value is set; and means for setting the standard conductor width if no value is set.