AU610684B2

AU610684B2 - Method for confirming door attachment to coke oven

Info

Publication number: AU610684B2
Application number: AU28532/89A
Authority: AU
Inventors: Takeshi Kawakami; Shingo Sagame; Motoyuki Shimomura; Tsuyoshi Yamaguchi
Original assignee: Mitsubishi Kasei Corp; Mitsubishi Chemical Industries Ltd
Current assignee: Mitsubishi Chemical Corp
Priority date: 1987-07-14
Filing date: 1989-01-16
Publication date: 1991-05-23
Anticipated expiration: 2009-01-16
Also published as: DE3900923A1; JP2646359B2; AU2853289A; JPS6420292A

Description

610684 COMMONWEALTH OF AUSTRALIA PATENTS ACT 1952 COMPLET SPECIFICATION NAME ADDRESS OF APPLICANT: Mitsubishi Kasei Corporation 5-2, Marunouchi 2-chome, Chiyoda-ku Tokyo-to Japan SNAME(S) OF INVENTOR(S): SShingo SOGAME Tsuyoshi YAMAGUCHI Motoyuki SHIMOMURA Takeshi KAWAKAMI SADDRESS FOR SERVICE: DAVIES COLLISON Patent Attorneys 1 Little Collins Street, Melbourne, 3000.

SCOMPLETE SPECIFICATION FOR THE INVENTION ENTITLED: Method for confirming door attachment to coke oven The following statement is a full description of this invention, including the best method of performing it known to me/us:- R t.

Lc Background of the Invention a) Field of the invention: The present invention relates to a method and apparatus for confirming door attachment to a carbonization chamber of an coke oven.

0 0 b) Description of the prior art: 0 0 Out of the machines working around a coke oven, 0 0 o0 the pusher machine and the coke guide car detach and 0 '0 attach the doors from and to both the ends of carbonization 0 0 chambers each time carbonized coke is to be discharged from a carbonization chamber and new raw material is to be ooo o charged into a carbonization chamber.

0 00 oo 0 oo0 Further, since a coke oven is operated ordinarily 00005 every five carbonization chambers for performing about 100 o 0 to 160 carbonization operations per day, each of the pusher o machine and the coke guide car detaches or attaches the O00 o doors from or to the carbonization chambers at a frequency oooso0 of 100 to 160 times per day.

The detachment of the door can be confirmed automatically with a limit switch provided on the lifter of each working machine. However, the attachment of the door cannot be confirmed sufficiently with the limit -lac c- -crr-- switch and the door may be dropped down when, for example, the door bar rides over the tip of the door frame hook of the carbonization chamber or the door is not fitted snugly into the door frame hook. In order to prevent the door from dropping down from the door frame hook, it is currently practised by the operator to confirm the door attachment condition by visual check or through a TV camera installed in an operation room.

In the present circumstance where various types of o°°I working machines are operated automatically around coke 0o 00 0 0 ovens, it is demanded to develop a method for accurately O ft and adequately confirming the automatic door attachment for eliminating the inconvenience of human intervention 0 0 0 required only for confirming the door attachment condition.

Summary of the invention 0 0 0 0 00 A primary object of the present invention is to Oo0o 0 provide a method for accurately confirming door attachment to a coke oven with little misjudgement and with no visual 0oo check by the operator.

oI0H The confirming method according to the present invention comprises determining positions of the door frame hook and the door bar through computational processing on the bases of images formed by a camera for photographing the location where the door bar is fitted into the door frame hook on the carbonization chamber of a coke oven, -2-

_I~I

and confirming the door attachment based on whether or not the positions of the door frame hook and the door bar are located within a certain definite range relative to predetermined positions, thereby enabling to perform door attachment securely without visual check by the operator.

Speaking concretely, the method for confirming door attachment by the machines working around a coke oven according to the present invention includes an image C0 processing stage, uses a TV camera arranged for this oo 0 0 0. i.10 purpose at a location convenient for clarifying positional 0 0 o relationship between the bar on the carbonization chamber 0 0 0 0 o door and door frame hook on the coke oven, identifies the ,o 0 o positional relationship between the door bar and the door frame hook by processing the images photographed by the TV 0ooO 5 camera and sent therefrom, and judges completion of the 0 0 0 ooQ o oo0 door attachment when overlap degree is not less than a 000. certain preset value (for example 20 mm), or judges improper door attachment when the overlap degree is smaller than che preset value or cannot be detected.

on 0 0 000 For determination of the positional relationship 0 0 to be used by the door attachment confirming method according to the present invention, it is conceivable to adopt one of the methods described below: To design the bar on the chamber door and the door frame hook on the coke oven so as to have brightness 3 or reflectance different from that of the other members, identify the shapes of the bar on the chamber door and door frame hook on the coke oven in distinguishment from those of the other members, and determine locations of the identified images on X-Y coordinates through computational processing, thereby determining positional relationship between the door bar and door frame hook.

oo o For this method, it is preferable to paint the door a 0010 bar and door frame hook in white or design them so as o 0° to have higher reflectance since the members arranged a0 0 0 °d in the vicinity of the chamber door are generally 00 0 o° 0 blackish as a whole.

To trace markings at predetermined locations on the ooo °0 015 door bar and door frame hook arranged on the coke a 0 0 o o oven, detect positions of the markings on the basis o' the difference in brightness or reflectance 0 0 produced due to difference in color, and determine i positional relationship between the door bar and the 0 0 o hook on the basis of the positional relationship 0 0 between the markings.

Taking the discharge side as an example, operating sequence can be summarized as follows: 4 Conventional operating sequence Positioning of coke guide car to carbonization chamber Door detachment Forward drive of coke guide car for positioning to put out coke guide cage Putting out coke guide cage and discharging of coke Putting in coke guide cage Backward drive of coke guide car for positioning to attach door o Door attachment Drive to next chamber 00ooo00 o 0 0 00 0 o0o Operating sequence by using the method according oo to the present invention 0 0 Positioning of coke guide car to carbonization chamber o 00 00 0 4, 000 0° Door detachment o 0 Forward drive of coke guide car for positioning to put out coke guide cage Putting out coke guide cage and discharging of coke 5 Putting in coke guide cage Backward drive of coke guide car for positioning to attach door YesDoor attachment Drive of coke guide Door attachment Judgement car to next chamber _car to next chamber Yes st judgemen o Program stop alarm ,o Manual intervention 0 0 0 0 0 o o0 o o o As is understood from the tables shown above, the °o conventional operating sequence includes visual check for 00 0 0 0 0' confirming overlapping between the door bar and the door frame hook before attaching the door, whereas the method 0000oooo 0 0 0 00 according to the present invention determines and judges 0 0 0 overlapping between the door bar and the door frame hook 0 o o00 through computational processing on the basis of the above-described images or markings photographed by a TV S0 °o camera, and allows the coke guide car to run to the next 0000 Soo°. carbonization chamber when judgement result is YES. If the judgement result is NO, the door attachment operation is performed automatically once again, and the coke guide car is driven to the next carbonization chamber after judgement result becomes YES. Should the judgement result is NO once again, the operating program is stopped and alarmed,and the door is attached by manual intervention.

-6 L Brief Description of the Drawing The acccompanying drawing shows a conceptional diagram illustrating an embodiment of the present invention.

Detailed Description of the Preferred Embodiment Now, the method for confirming door attachment on a coke oven according to the present invention will be described concretely with reference to the accompanying o0 0 drawing.

0 The accompanying drawing shows a conceptional 4 0 i: i0 diagram illustrating an image processing system utilizing the method according to the present invention. In this 00 o drawing, the reference numeral 1 represents a door frame hook arranged on a coke oven, the reference numeral 2 0000 00 0 designates a door of a carbonization chamber and the 00 0 0015 reference numeral 3 denotes a door bar arranged on a chamber door which is shown in the condition fitted in the o a door frame hook i. The reference numeral 4 represents a o0o camera arranged at a location permitting photographing a 000 0 side surface la of the door frame hook i, the reference 0 0 numeral 5 designates a strobe for illuminating the same side surface la, the reference numeral 6 denotes an image processing unit and the reference numeral 7 represents a monitor television set. Further, markings B and C consisting of a reflecting material are traced on the side -7surface la of the door frame holok 1, and the similar marking A is formed on an end surface 3a of the door bar 3.

In the system described as the embodiment of the present invention, the strobe 5 is flashed, and the door bar and the door frame hook are photographed by the camera 4 when the door is to be attached. The images photographed by the camera are subjected to computational processing by the image processing unit 6 for judging whether or not obtained by the computational processing.

The TV screen illustrated in the accompanying drawing exemplifies images photographed by the camera and projected to a monitor television set. Values of t, and Z2 shown in the drawing are determined through computational processing and compared with stored preset values for 00 judgement. For example, it is first confirmed that value 0000 Of Z2 exceeds a preset value before and while lowering the chamber door and then attachment of the door is confirmed when value of k, becomes smaller than a preset value.

0 0 4-0O20 The confirming method according to the present 00 0 0 0 invention can provide the merits enumerated below.

By combining the method with an operating sequence for automatic drive and automatic positioning, it is possible to operate the working machines in completely unattended conditions since the method nnables 8oo o 0 00 0 0 0 o 0 S0 0 0 00 0 00 automatic confirmation and eliminates the human intervention in contrast to the conventional operating sequence which required confirmation by the operator working at the site or through a TV set installed in an operation room.

The method enables to operate a coke oven equipped with multiple carbonization chambers with a single operating system in contrast to the conventional operating system which required, for example, 100 limit switches for a coke oven equipped with 100 carbonization chambers.

The method permits preventing disastrous accidents such as dropping of the chamber door and outflow of charged coal due to improper door attachment.

0000 0 0 0 0 00 oo0o 0 0 0 0e 0 9 L i.

Claims

1. A method for confirming door attachment to a carbonization chamber of a coke oven using a door frame hook arranged on a carbonization chamber of a coke oven, a door arranged on said coke oven for opening and closing the carbonization chamber, a bar arranged on said door and to be fitted into said door frame hook, and a photographing device arranged so as to be capable of photographing the 0 location where said door bar is fitted into said door frame 10 hook, said method being so adapted as to judge door attach- ment based on whether or not overlapping area between the door frame hook and the door bar is not less than a preset value through computational processing for determining 9 positional relationship between the door frame hook and 1L5 the door bar on the basis of the images photographed by said photographing device.

2. A method for confirming door attachment to a 0 carbonization chamber of a coke oven using a door frame hook arranged on the carbonization chamber of the coke oven and equipped with a marking, a door arranged on said coke oven for opening and closing the carbonization chamber, a bar arranged on said door, to be fitted into said door frame hook and equipped with a marking, and a photographing 0 0 00 00 -0 10 f ii I [I I[i iii device arranged so as to be capable of photographing the location where said door bar is fitted into said door frame hook, said method being so adapted as to judge door attach- ment based on whether or not the spacing between the marking on the door frame hook and the marking on the door bar is within a certain preset range through computational processing for determining positional relationship between the marking on the door frame hook and the marking on the o door bar on the basis of images photographed by said 0 00 photographing device.

3 Apparatus for confirming door attachment to a carbonization chamber of a coke oven using a door frame hook arranged on a carbonization chamber of a coke oven, comprising a door arranged on said coke oven for opening 0 61 and closing the carbonization chamber, a bar arranged on said door and to be fitted into said door frame hook, oo000 0 a and a photographing device arranged so as to be capable of photgraphing the location where said door bar is 0 fitted into said door frame hook, said apparatus 0 further comprising means so adapted as to judge door attachment based on whether or not overlapping area between the door frame hook and the door bar is not less than a preset value through computational processing for determing positional relationship between 11 the door frame hook and the door bar on the basis of the images photographed by said photographing device.

4 Apparatus for confirming door attachment to a carbonization chamber of a coke oven using a door frame hook arranged on the carbonization chamber of the coke oven and equipped with a marking, comprising a door arranged on said coke oven for opening and closing the carbonization chamber, a bar arranged on said door, to be fitted into said door frame hook and equipped with a marking, and a photographing device arranlged so as to be capable of photographing the location where said door bar is Zitted into said door frame hook, said apparatus further comprising means so adapted as to judge door attachment based on whether or not the spacing between the marking on the door frame hook and the marking on the door bar is within a certain preset range through computational processing for determining positional relationship between the marking on the door frame hook and the marking on the door bar on the basis of images photographed by said photographing device. I A method or apparatus for confirming door attachment substantially as hereinbefore described with reference to the accompanying drawing. disclosed herein or referred to or in &di ii the specification and/or cl~ r- o this application, individuall r--crITectively, and any and all combinations =45-ga-y-t-w-e--mre- -o-sai-d-seeps-r fo-eftu-re DATED this SIXTEENTH day of JANUARY 1989 Mitsubishi Kasei Corporation by DAVIES COLLISON Patent Attorneys for the applicant(s) 13 rV+