JPS605038B2 - Circuit drawing input method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit drawing input method that allows easy input of drawing information such as electrical circuit drawings.

Recently, there has been a demand for inputting electrical circuit drawings and the like into a computer system, filing them, and reconfiguring them within the same system. However, it is extremely difficult to have a computer directly read information such as circuit element symbols and connection lines, which are the constituent elements of a circuit drawing, and storing it as an image pattern requires a huge amount of memory. do. Therefore, conventional attempts have been made to code the drawing information and create cards or paper tapes, and then input these coded information to read the circuit drawings, but the coding process requires a great deal of effort. And so. Furthermore, since the information encoded on the card or paper tape and the original circuit drawing are completely different, it is not possible to easily check for errors.
Therefore, automatic discussion (input) of circuit drawings could not be performed simply and effectively. The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to file and edit information on circuit drawings, such as electrical circuit drawings, and to make the information in line with the original circuit drawings. It is an object of the present invention to provide a highly practical circuit drawing input method that allows easy checking and simple and effective input.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a drawing input device to which the method of the present invention is applied. In addition, Figure 2 shows an example of an electric circuit diagram input using this method, and Figure 3 is a drawing obtained by equivalently converting the electric circuit diagram shown in Figure 2 above according to this method. This shows one form. That is, the electrical circuit diagram shown in FIG. 2 is divided into constituent elements and represented as frame 1 as shown in FIG. 3. Further, the interconnection relationship of each of the above-mentioned constituent elements is expressed as a connection line 2 that connects each of the frames 1 to each other. In each frame 1, information specifying the component and information such as numerical values accompanying this information are entered as character symbols 3. Through such equivalent conversion, the electric circuit diagram shown in FIG. 2 is written on a predetermined sheet of paper in a positional correspondence as shown in FIG. 3. The above letter symbol 3 is used to indicate the type of component (element), such as "T" to specify a transistor, "R" to specify a resistor, and "C" to specify a capacitor, and "C" to indicate the transistor and type. It consists of "C" or "A", "R" or "L" indicating polarity/direction, numbers indicating capacitance value, resistance value, etc., and several unit symbols indicating units, and these are used in appropriate combinations. .

Incidentally, "rTC-237" represents an NPN transistor type number 237, that is, a transistor designated as "ruC237." In addition, "C-100P" has a capacity of 1
00pF capacitor, "R-10K" is shown as 10KQ resistor, etc. Furthermore, "DL-IS1835"
"A-1" indicates a diode with the product name IS1835 written with the cathode on the left, and "A-1" indicates an inverting amplifier. Incidentally, the hyphen "1" in the character symbol 3 indicates separation between the specific symbol of the component and the information accompanying it. As is clear from comparing the information on the circuit drawing created in this way (shown in Figure 3) with the original circuit diagram shown in Figure 2, the information on the circuit drawing created in this way completely corresponds to the configuration of the drawing layout, and each Each component can be recognized very accurately from the character symbol 3 written in the box 1.

Moreover, the interrelationships of each component can be clearly recognized,
Information such as resistance value can also be obtained at the same time. Therefore, it is possible to check errors in equivalently converted drawings very easily and appropriately. Moreover, this check involves almost no technical difficulties. Now, the information of the circuit drawing that has been equivalently converted and written on a predetermined sheet of paper as described above is input into the computer system and filed in the following manner.

In FIG. 1, a rice bran imaging device 1 consisting of an ITV scanner, etc.
1 scans the drawing information on the paper in line and sequentially inputs the image signals.

The image signal obtained by this imaging device 11 is sent to a connection line detection circuit 12, a frame detection circuit 13, and a frame position detection circuit 14.
are supplied in parallel to each other. The connection line detection circuit 12 cooperates with the frame detection circuit 13 to detect a straight line formed by the image signal, and when the same straight line does not indicate the frame 1,
This is recognized as a connecting line. Further, when the straight line segments form a predetermined box, the frame detection circuit 13 detects this as a frame 1. At this time, the frame detection circuit 13 also determines the size of the detection frame, extracts an elephant signal indicating the character symbol 3 written in the frame 1, and writes it into the memory 15. Further, the frame position detection circuit 14 is connected to the frame detection circuit 13.
When the frame 1 is detected, in response to the detection information, the frame 1 is detected based on the timing of the image signal from the imaging device 11, etc.
The coordinate position of is being detected. This allows the frame position detection circuit 14 and the connection line detection circuit 12 to obtain information on the frames 1 indicating the constituent elements of the circuit drawing and the connection lines 2 indicating the interconnection relationship between these frames 1, respectively. on the other hand,
The image signal stored in the memory 15 is sent to the character symbol recognition circuit 16.
is read out. This character/symbol recognition circuit 16 cuts out the image of the character/symbol 3 formed by the image signal one by one and identifies each character/symbol 3 by pattern recognition, and is equipped with a so-called OCR function. However,
The information on the characters and symbols 3 individually recognized by the character and symbol recognition circuit 16 is encoded and guided to the information identification circuit 17. The information identification circuit 17 refers to the information code registered in advance in the information table memory 8 and determines whether the information obtained by the combination of the identified character symbols 3 is, for example, a transistor, a resistor, or a capacitor. It identifies the type of component, such as The identification information, that is, a code identifying the component as a transistor or the like, as well as information such as a numerical value associated with the component are led from the information identification circuit 17 to the output circuit 19. At this time, the output circuit 19 inputs the code information for specifying the horizontal elements, etc., the position detection information of the frame 1, and the information of the connection line 2 connecting the frames 1, and correlates these information. I output it to a computer system, etc., and register it as a memo. Therefore, in the memory of the computer system, frame position information indicating frame 1, information specifying the component indicated by frame 1 described in frame 1, and information accompanying the component are registered, and Connection line 2 connecting frame 1
information, that is, information indicating the interrelationships of the constituent elements, will be registered. Incidentally, when discussing the circuit drawing input as described above, for example, the pattern information of various constituent elements registered in advance in the pattern memory is read out in correspondence with the information of the character symbol 3 specifying the constituent element, and This pattern information is written into the image memory as an image signal according to the frame position information.

Further, information indicating resistance values, etc. is written in the form of character symbol patterns in the vicinity of the pattern image in the image memory. Thereafter, by sequentially reading out image signals representing each pattern from the image memory and outputting them to a display or drawing device, it is possible to form and output a reconstructed and standardized drawing of the original circuit drawing. According to the device that adopts this method,
By effectively utilizing the character symbol reading function of OCR, which has been developed and completed in various ways,
Information on complex circuit drawings can be entered very easily and accurately.

Moreover, it is only necessary to indicate the constituent elements of the circuit drawing in frame 1, equivalently transform them into a state corresponding to the position in the drawing, and write in the frame 1 the character symbol 3 that specifies the constituent element indicated by the frame. , its input operation is very easy. Furthermore, by writing in the necessary subordinate information in the box 1, these items can also be input easily, which is very practical. In addition, it is possible to divide a circuit diagram into multiple functional blocks, input the circuit diagrams of these blocks, and then synthesize them as appropriate within the computer system, making it easy to input even complex circuit diagrams. . Further, by appropriately increasing the size of the frame 1, it is possible to input a large amount of information to the constituent elements, and therefore the system has wide adaptability to various constituent elements. Furthermore, since the connecting lines 2 can be directly input as information indicating the interrelationship of the constituent elements, drawings can be formed very easily, and there is no need for advanced code conversion processing as in the past. It has the following advantages. Note that the present invention is not limited to the above embodiments.

In the embodiment, input of electrical circuit drawings has been described, but it is also applicable to input of functional block drawings, sequence control circuit drawings, mechanical circuit drawings, etc. Further, the detection of the frame 1 and the means for detecting its position are not particularly specified. For example, three "U"-shaped lines, which are characteristic of frame 1, may be detected and recognized as a frame, and distinguished from connection lines. Further, the node form of the connection line may also be specified by a character symbol. Furthermore, the configuration of the input device can be modified in various ways, and in short, the present invention can be implemented in various modifications without departing from the gist thereof.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a drawing input device to which an embodiment of the present invention is applied; Fig. 2 is a diagram showing an example of an electric circuit drawing to be input to the device; and Fig. 3 is an equivalent diagram using the present method. FIG. 3 is a diagram showing one form of a converted drawing; 1... Frame, 2... Connection line, 3...
...Character symbol, 11... Imaging device, 12...
... connection line detection circuit, 13 ... frame detection circuit,
14...Frame position detection circuit, 15...Memory, 16...Character symbol recognition circuit, 17...
- Information discrimination circuit, 18... Information table memory, 19... Output circuit. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1 Components of the circuit drawing are shown by frames, and information about the components is written within the frames using characters and symbols, and the mutual relationships of the components are shown by connecting lines between the frames. The written information on this paper is captured and inputted, the positional information of the component is obtained by detecting the frame image, and the character symbol written in the frame is recognized to identify the component. 1. A circuit drawing input method characterized in that the mutual relationship between these identified components is detected from the connection line. 2. The character symbol written within the frame is composed of a character symbol code specifying the component indicated by the frame and a character symbol code indicating information accompanying the component. Circuit drawing input method.