Distributed control system for heavy construction machine
First Claim
1. A distributed control system for a heavy construction machine, comprising:
- a main control module for sending operation signals and receiving modular signals via a single line, said signals being packet signals comprising error correction code;
a first module for controlling a first part of the heavy construction machine, said first module receiving operation signal from the main control module and sending the modular signals which indicate status of the first part under the control of the first module; and
a second module for controlling a second part of the heavy construction machine, said second module receiving operation signals from the main control module and sending the modular signals which indicate status of the second part under the control of the first module;
wherein said main control module determines as error when the modular signals are not received within a predetermined time.
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Accused Products
Abstract
A distributed control system for a heavy construction machine, comprising a plurality of modules into which components in the heavy construction machine are classified according to functions and positions. The modules are individually controlled and each of them exchanges information with a different one of the modules through a single line. According to the present invention, the number of wires is significantly reduced, thereby making the wiring in assembling and repairing very easy. Also, when the heavy construction machine fails, the corresponding portion can readily be grasped and repaired. Further, the model and function of the heavy construction machine can readily be modified.
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Citations
9 Claims
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1. A distributed control system for a heavy construction machine, comprising:
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a main control module for sending operation signals and receiving modular signals via a single line, said signals being packet signals comprising error correction code; a first module for controlling a first part of the heavy construction machine, said first module receiving operation signal from the main control module and sending the modular signals which indicate status of the first part under the control of the first module; and a second module for controlling a second part of the heavy construction machine, said second module receiving operation signals from the main control module and sending the modular signals which indicate status of the second part under the control of the first module; wherein said main control module determines as error when the modular signals are not received within a predetermined time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A distributed control system for a heavy construction machine, comprising:
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a main control module for sending operation signals and receiving modular signals via a single line, said signals being packet signal comprising error correction code; a first module for controlling a first part of the heavy construction machine, said first module receiving operation signals from the main control module and sending the modular signals which indicates status of the first part under the control of the first module; a second module for controlling a second part of the heavy construction machine, said second module receiving operation signals from the main control module and sending the modular signals which indicates status of the second part under the control of the first module; and a timer associated with the main control module; wherein said main control module determines as error when the modular signals are not received within a predetermined time; and wherein each of said main, first and second modules comprises; a main controller for controlling parts of the heavy construction machine; an input/output terminal for sending and receiving signals from other modules; a communication controller comprising a first shift register for storing the received signal from other module, a second shift register for storing the data to be sen to other module, and a decoder for enabling the main controller to read the first shift register and write the second shift register; and a memory for storing a program for controlling the part of the heavy construction machine under the control of the module.
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8. A method of controlling a distributed control system comprising a main control module, a first module and a second module communicating with the main module via a single line by packet signals, wherein said main control module performs in sequence the steps of:
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providing an initializing packet when the system starts; transmitting the provided packet to the first module which enables a reception mode of the first module; receiving a packet from the first module and determining as error when the packet is not received within a predetermined time; processing data in the received packet to control indicators according to allocated addresses; providing a subsequent package and switching to the second module; transmitting the subsequent packet to the second module which enables a reception mode of the second module; and receiving a packet from the second module and determining as error when the packet is not received within a predetermined time. - View Dependent Claims (9)
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Specification