JPH03163982A - Supervisory device for wireless control plant - Google Patents

Abstract

PURPOSE:To exactly detect the invasion of an unexpected outsider by comparing picture data corresponding to a danger area with picture data which is previously picked up and is preserved and deciding it to be the invasion of the outsider in the danger area when a non-coincident output is obtained. CONSTITUTION:The output video signal of a image pickup camera 11 is digitalized in an analog-digital converter 12, and is inputted to a comparator 13. Fixed video data in which the danger area in a regular state is previously picked up is stored in the comparator 13. The comparator 13 compares video data which is picked up at present with fixed video data. When a non-coincident compared result is obtained, the non-coincident signal of a controller 14 is supplied. When a non-coincident output is obtained, it means that a moving body different from the regular state or the outsider invades the danger area. In such a case, the controller 14 immediately transmits a control signal for stopping the driving motor of a corresponding crane 15 and stops the operation of the crane 15.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a monitoring device for a radio-controlled plant.

(Problems to be solved by conventional technology and invention) Inside a factory, rails for moving the crane are attached to the ceiling, and this crane can be moved to a desired position or transported by radio control. There is a radio controlled plant. To perform radio control of a crane, a worker usually operates the crane while visually observing the area in which the crane is moving, but depending on the location, there may be a blind spot for the worker.

For this reason, when designing the radio photography vertical plan 1, it is necessary to choose the radio control room and the movement route of the crane in order to avoid blind spots as much as possible. For this reason, there are problems in that it takes time to design the plant and the scale of the plant increases. Furthermore, visual monitoring may not be sufficient, and there is a risk that a sudden intrusion by an outsider could cause the crane's debris to hit the outsider and cause an accident.

Furthermore, when an operator is operating a crane while holding a mobile radio, the operator may intrude into the range of movement of the crane. This? If this happens, the pilot's confidence will be at risk.

Therefore, in this invention, it is possible to easily detect the intrusion of an outsider into a dangerous area, and also to properly detect the intrusion of an outsider when unexpected, and the detection signal can be used to stop the crane, etc. It is an object of the present invention to provide a wirelessly controlled plant monitoring device that can be obtained and that can facilitate plant design.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an imaging camera that images at least a preset dangerous area, and image data corresponding to the dangerous area among video signals from the imaging camera. a comparison means for comparing the image data and image data taken and stored in advance to obtain a match/disagree output; and when a mismatch output is obtained from the comparison means, it is determined that an outsider has entered the dangerous area. and determining means.

(Function) With the above means, even if an outsider enters a dangerous area, it can be easily detected, a stop signal can be automatically sent to a crane, etc. Freedom is relaxed.

(Length example) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a one-length embodiment of this invention. Reference numeral 11 denotes an imaging camera, and in this imaging camera 11, an imaging area A is fixed in advance. This imaging area A is, for example, a vicinity where the crane 15 passes, and is a dangerous area where there is a risk of colliding with the crane 15 if an outsider or a moving body enters this area.

The output video signal of the imaging camera 11 is digitized by an analog-to-digital converter 12 and input to a comparator 13.

The comparator 13 stores in advance fixed video data obtained by capturing an image of a dangerous area in a steady state.

The comparator 13 compares the currently captured video data with the fixed video data, and supplies a mismatch signal to the control device 14 if a comparison result indicating a mismatch is obtained. , the fact that a mismatch output is obtained in the comparator 13 means that a moving object different from the steady state or an outsider has entered the dangerous area. In such a case, the control device 14 immediately sends a control signal to stop the drive motor of the corresponding crane 15, thereby stopping the operation of the crane 15.

Although the figure shows only one system for the crane and imaging camera, there are many systems installed inside the factory, and the system is configured so that the monitoring information, that is, the output of the comparator of each system, is manually input. There is. Further, if a mismatch output is obtained from any comparator, the control device 14 can stop the corresponding crane. The method for stopping the crane may be any arbitrary method such as a wireless method or a direct control method through a line.

FIG. 2 is a diagram showing the relationship between the imaging area B of the imaging camera 11 and the dangerous area A. 5 of the imaging camera 11 If the entire imaging area B is designated as a dangerous area, if an outsider or the like intrudes into this area, the system may be stopped because the situation is different from the normal state. However, for example, imaging area B should be set as a warning area, and if an abnormality is detected there, an alarm will be issued, and if an abnormality is detected in dangerous area A, the crane etc. will be completely stopped. This will ensure smooth operation.

In the present invention, a monitoring light source 11a such as a light emitting element may be actively attached to an outsider's helmet or the like. This is because, as shown in Figure 3, for example, the brightness of the image may not be uniform depending on the angle of the field of view of the camera 11 relative to the floor, and malfunctions may occur due to reflections from lighting or parts. be. In such a case, the detection level is increased, and if there is something that emits more light, it is set to be in an abnormality detection state. Furthermore, by constructing such a means, the monitoring range can be widened and the number of cameras can be reduced.

Additionally, in the above explanation, if an outsider enters the dangerous area, the crane, etc. will be stopped, but the direction of movement of the crane should be controlled to prevent the crane from moving in the direction of the dangerous area. may be controlled.

Although the above explanation has been given as a monitoring system inside a factory, the invention is not limited to the mountainous area of a factory, and the present invention can be applied to various places.

Furthermore, the information to be monitored by the camera may include not only the luminance component but also a specific color component. For example, the worker's clothing or the like may be set to a specific color, and a certain amount of that color may be detected.

FIG. 4 shows yet another embodiment of the invention.

This embodiment is an example in which a crane 21 is equipped with a receiving device 23 and an image processing device 24, and the movement of the crane is controlled by a remote controller 25 by a driver. In this case, a camera 26 is installed to monitor the area around the hook of the crane, and the crane is stopped when the operator or an outsider invades the dangerous area in the direction of movement of the crane 21. ing.

[Effects of the Invention] As explained above, according to the present invention, even if there is a blind spot area, it is possible to easily detect an outsider's intrusion into the area, and to prevent an outsider's intrusion when unexpected. It is also possible to properly detect cranes, etc. based on the detection signal, and to facilitate plant design.

[Brief explanation of the drawing]

FIG. 1 is a system explanatory diagram showing an embodiment of the present invention, and FIGS. 2 and 3 show the monitoring area of cameras 11...camera, 12...analog-digital converter, 13...comparator , 14...control device.

Claims (1)

[Claims] An imaging camera that images at least a preset dangerous area; Image data corresponding to the dangerous area among video signals from the imaging camera and image data that has been captured and stored in advance. and a determining means for determining that an external object has entered the dangerous area when a discrepant output is obtained from the comparing means. Radio control device.