Excavating
Patent
1989-12-29
1992-04-14
Atkinson, Charles E.
Excavating
371 206, G06F 1100
Patent
active
051054264
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a device for detecting the position of broken line suitable for a series controller for use in a centralized control system for a machine such as a press machine, a machine tool, construction equipment, a ship, or an aircraft, and in a centralized control system for an unattended conveyor or an unattended storagehouse.
BACKGROUND ART
When a press machine, a machine tool, construction equipement, a ship, an aircraft, an unattended conveyor an unattended storagehouse or the like is controlled in a centralized manner, many sensors for detecting the respective conditions of the elements of such machine and many actuators for controlling the respective conditions of the elements of the machine are required. The number of these sensors and actuators, for example, reaches 3,000 or more in the case of a press machine and much more in other devices.
Conventionally, a centralized control system which controls such a machine in a centralized manner is constructed such that many such sensors and actuators are connected to a main controller which collects the outputs of the sensors and controls the actuators in accordance with signals from the main controller.
In such conventional centralized control system, the number of lines which connect the main controller and the sensors and actuators is large and the structure of the input/output of the main controller is very complicated as the respective numbers of sensors and actuators are large.
An arrangement is proposed in which a plurality of nodes are connected in series, each node being connected to one or more sensors and actuators, the nodes being connected in a ring via a main controller which outputs signals to the respective nodes for controlling purposes. In such arrangement, basically, the main controller is required to have only signal input and output lines and the respective nodes are only required to connect signal input and output lines. Thus, the number of lines is greatly reduced.
However, in the arrangment where the nodes are connected in series, it is a problem how to ensure the simultaneous collection of the respective outputs of the sensors and the simultaneous respective control of the actuators. For example, if an arrangement is considered in which addresses are allocated to corresponding nodes, which are then controlled in accordance with those addresses, the problem is a time delay due to this address processing, and the simultaneous collection of the respective outputs of the sensors and of the simultaneous control of the actuators cannot be ensured.
The inventors have proposed a series control system which identifies the respective nodes according to the sequence of connection of the respective nodes to thereby render the address processing useless, eliminates the time delay due to the address processing, and greatly simplifies the node structure while discarding the concept of allocating addresses to the respective node although a structure to connect the respective nodes in series is employed.
This arrangement operates such that the respective nodes sequentially add the output signals from those nodes to the signals from the upstream nodes, sequentially extract signals from the upstream nodes to those nodes and outputs them to the actuators in those node in accordance with a predetermined rule. In this case, each node does not need any address, and no address processing is required, so that a time delay in each node includes a very small one required for timing only to thereby greatly simplify the structure of the nodes.
FIG. 11 shows one example of the structure of the whole series controller, mentioned above.
In FIG. 11, reference numeral 10 denotes a machine controller as the above controller which controls an object machine synthetically; 2-1 to 2-n, sensors or actuators disposed in the respective sections of the machine; 30, a central controller (main controller) disposed as the central processing unit at the machine controller 10; 4-1 to 4-n, peripheral controllers (node controllers) di
REFERENCES:
patent: 4122358 (1978-10-01), Altmann
patent: 4907227 (1990-03-01), Unno
Albaugh et al., Fault Detection Serial Communication Bus, IBM Technical Disclosure Bulletin, vol. 22, No. 5, Oct. 1979, pp. 1778-1779.
Atkinson Charles E.
Kabushiki Kaisha Komatsu Seisakusho
LandOfFree
Device for detecting the position of broken line in a series con does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for detecting the position of broken line in a series con, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for detecting the position of broken line in a series con will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2355298