JPH0399367A - Cad system - Google Patents

Abstract

PURPOSE:To reduce the waiting time of drawing data transmission by providing a host computer with a required decision part and providing each work station with a register for storing changed data, a communicatable state communicating part with the host computer and a changed data transmitting part. CONSTITUTION:During the transmission of data from a storage device A to a certain work station C1 e.g., the host computer B does not transmit the data to other work stations C2 to Cm. When the drawing data are partially changed by an I/O mechanism G1 in the station C1, the changed data are stored in an F1A register of a terminal equipment F1. The F1B communication part communicates whether the computer B can receive the data or not and the changed data of the register are transmitted to the computer B through an F1C transmission part in accordance with an available response from the decision part B1. As compared to a case transmitting changed data after changing the whole drawing, the transmission of each changed data makes it possible to shorten the transmission waiting time of the drawing data to the host computer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a CAD system in which a host computer and a plurality of workstations are connected via communication lines.

[Conventional technology]

In recent years, in order to improve the efficiency of new product development and design,
A CAD system consists of a host computer connected to a storage device that stores various drawing data, and multiple workstations connected to the host computer via communication lines.
]) eaign System) came to be used.

FIG. 3 is a block diagram showing an embodiment of the CAD system as described above.

People store various drawing data in data files AI and A2 for each drawing on a storage device such as a magnetic disk drive.
．． ...It is registered in advance as Arn.

B is a host computer that controls the registration and retrieval of data in the f-tough aisles AI to An of the storage device A. C1 (C2...Cm) are workstations, each of which has a terminal device Fl (F2...Dm) connected to the host computer B via a communication line Di (D2...Dm).
Fm), a storage section ga (Eb...Em) connected to this terminal device Fl (F2...Fm), and an input/output mechanism Gl (G2...Gm).

It is composed of The storage section E& includes a recording member such as a floppy disk, and registers a data file AX selected from among the data files AI to An stored in the storage device AK as a data file E1. The input/output mechanism G1 is an input/output means such as a graphic terminal, and is a display section GI A that displays the drawing on a screen such as a cathode ray tube based on the drawing data registered in the data file E1, which is stored in the data file E1. It consists of an operation section GIB for changing the drawn drawing data.

The terminal device F1 registers and calls drawing data in the storage section Ea, displays the drawing data registered in the storage section E& as a drawing on the display section GIAK, and displays the drawing data on the operation section GI.
The drawing data is changed based on instructions input from B. Furthermore, the terminal device F1 transmits and receives data to and from the host computer B via the communication line DI.

With the above configuration, the terminal device F1 requests the host computer B via the communication line D1 to retrieve the drawing data registered in the cheat file AX of the storage device A based on the instruction input to the operation unit GIB. send a signal to The eight host computers call up the drawing data registered in the data file AI of the notifier and transmit it to the terminal device F1 via the communication line D1. The terminal device F1 registers the received drawing data in the storage unit El as a data file E1.

The terminal device F1 reads the drawing data of the data file E1 from the storage section Ea, and displays a drawing based on the drawing data on the display section CIA.

While looking at the drawing displayed on the display section GIA, press the operation section GI.
Operate B to change the above drawing data and create a desired drawing.

Every time the terminal device F1 changes the drawing data, it inputs the changed data into the storage section Ea, and when all the drawing data has been changed, the terminal device F1 inputs the drawing data of the data file E1 from the storage section E&. Call data, communication time dD1
to host computer B via.

The host computer B deletes the cheetah file AX from the storage device and registers the drawing data newly received from the terminal device F1 as the data file AX.

[Problem to be solved by the invention]

The time required to transmit the data of the starting and ending points of one line segment between the workstation C1 and the host computer B is less than a few microns.

However, in the case of design drawings with complex shapes and AO size, it is difficult to send the data of the entire drawing at once.
It often takes about 0 minutes.

Mata, workstation C1 and host computer B
While the drawing data is being transmitted between the host computer Bt-j and the other workstations C2 to Cm
Therefore, in a CAD system with multiple workstations CI to Cm, long waiting times may occur.

An object of the present invention is to provide a CAD system that reduces waiting time for transmitting drawing data between a host computer and a workstation. In stations CI to Cm, there is a vacant time of more than 5, in which nothing is processed, between one line segment change operation and the next line segment change operation.

In addition, storage devices connected to the host computer include
Since the drawing data before the change is registered, only the drawing data changed on the workstation is sent to the host computer and recorded each time.

By updating the corresponding part of the data file in the storage device, the drawing data can be updated in a short time.

In order to achieve the above object, in the present invention, each workstation includes a register unit that temporarily stores changed data, a communication unit that communicates with the host computer to check whether the host computer is ready for reception, and a register unit that temporarily stores changed data, a communication unit that communicates with the host computer to check whether the host computer is ready for reception, and a register unit that changes data when it is ready to receive data. A transmitting section for transmitting data is provided, and a determining section is provided for preventing simultaneous use of the same drawing data by the host computer K and each workstation.

[For production]

Then, the workstation sends a signal requesting to call up the drawing data to the host computer, and the determination unit of the host computer determines whether or not the drawing data requested by the workstation is being used by another workstation. .

The host computer transmits the requested drawing data to the requesting workstation when the requested drawing data is not in use by another workstation.

When the drawing data is changed at the workstation, the changed data is temporarily stored in the register section.

When the communication section of the workstation confirms that the host computer is in a receivable state, the transmission section transmits the change data stored in the register section to the host computer.

In this way, instead of transmitting data for the entire drawing, only changed data is transmitted to the host computer every time a change is made, so that the waiting time for transmitting drawing data can be reduced.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the CAD system of the present invention, and the same and corresponding parts as in FIG. 3 are given the same reference numerals.

Below, host computer B and workstation C1 (workstation C2) are equipped with functions different from conventional ones.
The configuration of 1) in which Cm is the same as CI will be explained.

The host computer B is provided with a determination section B1 having the following functions in addition to the conventional functions.

(1) When the workstation C1 sends a signal requesting to call the drawing data of the data file Arc, the data file AX is transferred to another workstation C2.
It is determined whether any of Cm to Cm is in use or not.

In the above determination, when the data file AX is being used in any of the other workstations C2 to Cm, the transmission of the drawing data to the workstation C1 is prohibited.

(2) When a signal requesting transfer of drawing data is transmitted from communication unit FIB of workstation C1, when host computer B is in a receivable state, it transmits a signal permitting data transmission to communication unit F1B.

In the workstation C1, a register section FIA, a communication section EIB, and a transmitter section FIC are installed in the conventional terminal device F1. The drawing data (coordinate data of the starting point and ending point) of the line segment before and after the change is stored for each time.

(2) The communication unit FIB communicates with the host computer B, confirms the receivable state of the host computer B, and transmits to the host computer B a drawing data recall request and a change completion signal.

(3) When the communication unit FIB confirms that host computer B is in a receivable state (when the transmission unit FIC receives a signal from host computer B that permits data transmission)
Only the drawing data stored in the register section F1fA is transmitted to the host computer B.

In the above configuration, the data file Ar of storage device A
The operation in the case where the drawing data of c is sent to the workstation C1, the data is changed, and the changed data is registered as the data file AX in the storage device A will be explained with reference to the flowchart of FIG.

Upon operation of the operation unit GiB, a signal requesting the use of the data file AX is transmitted from the communication unit FIB of the terminal device F1 to the host computer B via the communication line D1. (Corresponds to step 201. Hereinafter, step ○○O
is displayed. ) The determination unit B2 of the host computer B is
It is determined whether the data file input X is being used by any of the other workstations C2 to Cm. (Step 202) Host computer B stores the requested data file A.
When X is being used by any of the other workstations C2 to Cm, host computer B terminates without sending the drawing data to workstation C1.
When the data file AX is not used by any of the other workstations C2 to Cm, the drawing data of the data file AI is sent to the terminal device F1 via the communication line D1.
Send to. The terminal device F1 registers the drawing data transmitted from the host computer B in the storage section E& as a data file E1. (Step 203) The terminal device F1 calls the drawing data of the data file E1 of the storage section Ea, and displays the drawing on the display section CIA based on this drawing data. (Step 204) Operate the operation unit GIB so that the drawing displayed on the display unit GIAK becomes the desired drawing, and change one of the line segments that make up the drawing. (Step 205) The register unit FIA of the terminal device F1 temporarily stores the drawing data before and after the change of the changed line segment. (Step 206) Host computer B transmits to receiving computer B, which is not processing anything. (Step 207) When host computer B is processing, execute (step 207) again.

When host computer B is ready for reception, determination unit B
1 sends a signal that permits the transmission of drawing data to the communication unit FIB.
Send to. (Step 208) When the communication unit FIB receives a signal indicating that it has received a signal permitting the transmission of drawing data, the transmission unit FIC transmits the data to the register unit FIA.
The drawing data stored in the computer is transmitted to the host computer B via the communication line D1. (Step 209) Host computer B causes storage device A to update and register the drawing data at the relevant location in the drawing data of data file AX. (Step 210) Simultaneously with the processing of (Step 209), the terminal device F1 causes the storage unit E& to update and register the drawing data at the relevant location in the data file FJ1. (
Step 211) The terminal device F1 calls the updated drawing data in the data file E1 of the storage unit 1a, and displays the drawing on the display unit CIA based on this drawing data. (Step 21
2) Look at the updated drawing displayed on the display unit CIA and judge whether further changes to the drawing are necessary. (Step 213) If the drawing needs to be changed, (Step 205) and subsequent steps are repeated.

When the drawing change is completed, by operating the operation unit GIB, a completion signal is transmitted from the communication unit FIB of the terminal device F1 to the host computer B via the communication line D1. Host computer B is workstation C1
The use of the data file AX by the user is ended. (Step 214) As described in detail above, according to the present invention, after changing the drawing data, data for one drawing is sent all at once, and each time a line segment is changed, the host computer
Since the change data is transmitted at the same time, the time required for one transmission can be shortened, and the processing time from changing the drawing to registering the data in the storage device A can be shortened.

Furthermore, even if any of the workstations CI to Cm is transmitting change data to the host computer B, the change data is short data on the order of lines, so it can be sent in a short time (several minutes). Once the transmission is complete, you can immediately send the changed data from other workstations.
Change data can be sent to host computer B sequentially from each workstation.

〔Effect of the invention〕

As described above, according to the present invention, instead of transferring all the data of the entire drawing, the changed drawing data is sent from the workstation to the host computer every time the drawing data is changed. It is possible to eliminate the waiting time for data transmission after drawing data is changed.

[Brief Description of the Drawings] Figure i1 is a block diagram of the CAD system of the present invention. Second
The figure is a flowchart explaining the operation. Figure 3 shows
OA is a block diagram of a conventional CAD system. A...storage device, B... host computer,
B1... Judgment section, C1 to Cm... Work station, FIA to FmA... Register section, F
IB or FmB...communication department, FIC or FmC
...Transmission section.

Claims (1)

[Claims] 1. A storage device that stores multiple drawing data, a host computer that controls input/output of this storage device, multiple workstations that change the drawing data, and multiple communications that connect the host computer and each workstation. In the CAD system, the host computer is provided with a determination unit that prevents the workstations from using the same drawing data simultaneously; the workstation includes a register unit that temporarily stores changed data; A CAD system comprising: a communication section that communicates with a computer to confirm whether the host computer is in a receivable state; and a transmitter that transmits change data when the host computer is receivable.