CN1219495A

CN1219495A - Transmission device for elevator signal

Info

Publication number: CN1219495A
Application number: CN 97122370
Authority: CN
Inventors: 邸吉龙; 孟庆春; 孙学义; 张晓冶; 任维民
Original assignee: SIPING ELEVATOR MANUFACTURE CO Ltd JILIN PROVINCE
Current assignee: SIPING ELEVATOR MANUFACTURE CO Ltd JILIN PROVINCE
Priority date: 1997-12-08
Filing date: 1997-12-08
Publication date: 1999-06-16
Anticipated expiration: 2017-12-08
Also published as: CN1084705C

Abstract

A signal transmission device for elevator is composed of main controller, cage controller and floor station controllers. Each controller contains CAN bus controller, timer and tens of single-board microcomputers,as well as main control program, interrupt service program and queue transmitting program. The general signals are transmitted in queue mode. The real-time signals are sent in immediate mode. When one line in the bus is broken or shorted with ground, all nodes still work in lower S/N ratio. Its advantages are stable performance and high communication efficiency.

Description

Transmission device for elevator signal

The present invention relates to a kind of apparatus for controlling elevator, particularly relate to a kind of transmission device for elevator signal.Between mainboard microcomputer and stop microcomputer and car microcomputer, adopt many main structures mode that elevator signal is transmitted with serial mode.

The device that transmits elevator signal between mainboard microcomputer and stop microcomputer and car microcomputer with serial mode was also arranged in the past, for example the disclosed patent No. of Patent Office of the People's Republic of China is that ZL91101298.2, name are called transmission device for elevator signal, in this device, signal between mainboard microcomputer, stop microcomputer and the car microcomputer transmits by two communication cable serial transfers, wherein one is the transmission line, and another is for receiving line.Be dealt in the serial transfer sets of signals of stop computing machine and car microcomputer at the mainboard microcomputer, with the signal-less time more than the some cycles insertion byte serial signal amplitude, the microcomputer of stop and car is used as synchrodata with the signal-less time programming.But, in aforesaid elevator serial communication apparatus, adopt the master-slave mode communication modes between mainboard microcomputer and stop microcomputer and the car microcomputer, be that the mainboard microcomputer scans stop microcomputer and car microcomputer at any time, select in the collection outgoing call signal and data serials such as elevator operation and action command be sent to stop microcomputer and car microcomputer.For the signal that real-time is had relatively high expectations, impassabitity bus serial transfers such as Ru Men district signal, throw-over signal and end station signal.When there being one to open circuit or during with public ground short circuit, whole communication system just can't be worked in the communication line.Its error detection and processing capacity are relatively poor.These will cause the communication efficiency of whole communication system and reliability to reduce.

The objective of the invention is to provide a kind of transmission device for elevator signal that adopts the serial communication of many master modes.Promptly adopt many main structures to form the control bus network at mainboard microcomputer, stop microcomputer and car microcomputer, each node all can initiatively send data, and the node high with preceence takies bus earlier.

The object of the present invention is achieved like this, and this transmission device for elevator signal comprises master controller, elevator car and stop controller, and the mainboard microcomputer that has CAN bus controller and timer and dozens of parallel port all is being set in each controller; CANH and CANL serial UNICOM by the CAN bus between each controller form many master networks, each node all can initiatively send data, the node high with preceence takies bus earlier, automatically retransmit when the free time appears in the buses such as node that preceence is low, all wrong detection of each node is when the mistake on the bus is light, automatically get rid of, when mistake is serious, SELF CL, the possibility that bus is disturbed is reduced to minimum; In controller, be provided with master control program, interrupt service routine and line up router, be used for control data to drive corresponding load, show the various serviceability of elevator; For general signal, adopt formation to send, the signal of having relatively high expectations for real-time then adopts instant send mode, and reduces the transmission byte number, to guarantee the real-time requirement; When there being one to open circuit or during with public ground short circuit, all nodes are the signal to noise ratio communication to reduce then in the bus.

Since the present invention from the mainboard microcomputer to stop and the serial communication the car microcomputer adopted many main structures mode, communication between them only needs twisted-pair feeder to connect, and Jiang Men district, real-time higher signal such as end station etc. also pass through the bus serial transfer, and can change the transmission byte number at any time, have stable work in work, communication efficiency advantages of higher.

Concrete scheme of the present invention is provided by following embodiment and accompanying drawing thereof:

Fig. 1 is the block scheme of an embodiment of the invention;

Fig. 2 is the main program block diagram of mainboard microcomputer;

Fig. 3 is a CAN bus interrupt service routine block diagram;

Fig. 4 receives the acknowledge interrupt flow chart;

Fig. 5 sends the set up procedure block diagram;

Fig. 6 is the formation router.

Describe an embodiment of the invention in detail according to Fig. 1 to Fig. 6 below:

Fig. 1 is the block scheme of expression a specific embodiment of the present invention.Among Fig. 1,1 for being placed on the primary controller of building top layer escalator, 2 for being arranged on the mainboard microcomputer that in the master controller 1, wherein has CAN bus controller and timer and dozens of parallel port, 3 is the car of elevator, 4 for being arranged on the CAN bus controller of adorning equally with the mainboard microcomputer in the car 3 and deciding the car microcomputer of device and dozens of parallel port, 5 for being arranged on the control wheel in the car 3, contains on it just like the interior selected publication note button, interior selected publication note lamp, indicating device and the shift knob etc. that do not show among the figure.6 for be arranged in the terraced box of exhaling of stop, same with mainboard microcomputer 2, the stop microcomputer that wherein has CAN bus controller and timer and dozens of parallel port, the 7th, indicator for stop, 8 are arranged on the hall buttons of stop, 9 for being arranged on the hall buttons lamp of stop, hall buttons 8 and hall buttons lamp 9 have upwards and two of downward directions, herein shown in the figure for omitting one, 10,11 is respectively CANH line and the CANL line that connects the CAN bus of mainboard microcomputer 2, car microcomputer 4 and each layer microcomputer 6.

Fig. 2-Fig. 6 is the flow chart of mainboard microcomputer, Fig. 2 is a main program block diagram, and Fig. 3 is a CAN bus interrupt service routine block diagram, and Fig. 4 receives acknowledge interrupt handler block diagram, Fig. 5 sends to prepare the handler block diagram, and Fig. 6 is that formation sends the handler block diagram.

Below, in conjunction with Fig. 2-Fig. 6 the work of the transmission device for elevator signal shown in Fig. 1 is illustrated.Mainboard microcomputer 2 is at first led processing by the program of Fig. 2.Promptly carry out initialization operation in the step 21, read setting value in the step 22, terraced box and control wheel information are exhaled in input in the steps 23, going on foot 24 to exhaling terraced box and control wheel to send information, judge whether that in the step 25 information of receiving control wheel then enters 26 as receiving, do not receive then and to wait for, judge in the step 26 whether bus closes as closing and then enter steps 27 opening buses.As do not close and then return 23 and continue to read in that to exhale terraced box and control wheel information, Fig. 3 be CAN bus interrupt service routine.Preserve interrupt register in the step 31, judge whether it is to receive to interrupt, judge whether it is the overload hardwood if then enter the step 33 in the step 32, then enter 35 processing that overload in this way, return afterwards,, then enter 34 and receive acknowledge interrupt and return after handling as not being the overload hardwood.Judge as be not to receive to interrupt then entering the step 36 and judge whether to be to send to interrupt in the step 32, send in this way and interrupt, then send and prepare to return after the processing in the step 37, judge as not being the transmission interruption in the step 36, then judge whether to interrupt into mistake in the step 38, then change 39 wrong responses in this way and handle, otherwise return.

Fig. 4 receives response handling program.Judge in the reception table, whether to find identifier combination CID at from send buffer, fetch data length code DLC and identifier combination CID of step 41 in the step 42, as obtain affirmative acknowledgement (ACK), then judge action in the step 43, from control wheel information 44 or exhale terraced box information 45 or emergency information 46 to select that one is corresponding to be handled, enter the step 47 then, in judging in the step 42 as obtain negative acknowledge and then also enter the step 47 and return after discharging send buffers.Fig. 5 sends set up procedure; judge whether to being sent completely state in the step 51; as obtain affirmative acknowledgement (ACK) and then go on foot 52 queue pointer delivered to owner pointer; enter step 54 clear safeguard bits afterwards; as obtain negative acknowledge; then enter the step 53, the head of the queue pointer is delivered to queue pointer, at step 54 clear safeguard bits; judge whether to be instant transmission in the step 55; if then return, as not being that instant the transmission then judges whether that in the step 56 formation is full, as obtaining positive result and then call the formation router in the step 57; make the request of transmission in the step 58; return afterwards, then put formation transmission sign as obtaining negative acknowledge, return then in the step 59 in the step 56.

Fig. 6 is a formation router block diagram.In steps 61 length of fetching data, judge whether do not have enough spaces in the step 62, if do not have enough spaces then continue to wait in the original place, when being arranged, enough spaces just go on foot 63, put into formation sending data, judged whether that in the step 64 formation sends sign, if having, then in step 65 clear flags, and call the copy formation to the buffer zone program, and send 66 then, return afterwards, obtain negative acknowledge as judging, then directly return 64.

Service condition to mainboard microcomputer 2 is described in the above-described embodiment.Certainly the situation of mainboard microcomputer, stop microcomputer and car microcomputer in commission all is identical.

Claims

1, a kind of transmission device for elevator signal, this transmission device for elevator signal comprise master controller, elevator car and stop controller, it is characterized in that: all be provided with in each controller and have CAN bus controller and timer and mainboard microcomputer; CANH and CANL serial UNICOM by the CAN bus between each controller form many master networks, and each node all can initiatively send data, and the node high with preceence takies bus earlier; In controller, be provided with master control program, interrupt service routine and line up router, be used for control data to drive corresponding load, show the various serviceability of elevator; For general signal, adopt formation to send; The signal of having relatively high expectations for real-time then adopts instant send mode, and reduces the transmission byte number; When there being one to open circuit or during with public ground short circuit, all nodes are the signal to noise ratio communication to reduce then in the bus.