JPS6393420A - Malfunction deciding device for material detector - Google Patents

Abstract

PURPOSE:To correctly decide a rectification of errors of detected signals of a detector for materials, by providing a means to input a signal of a conveying speed detector for the materials, signals of plural material detectors and distances between the material detectors into a deciding means for the sensor malfunction. CONSTITUTION:The conveying speed detector 5 is provided on a conveying installation for steel materials 8, etc., and plural material detectors 1, 2 are provided at prescribed intervals in the conveying direction. Both detected signals of the conveying speed and materials are inputted into the deciding device 6 for malfunction rectification of errors, then only normal detected signal is outputted to a calculator 7. At the time of generating the detected signal of the material detector 2, comparison with an allowable value is performed through the distance between the detector 1 and 2 and cumulative present positions of the material. When the error is below the allowable value, the detected signal of the material detector 2 is decided as a normalcy. If it exceeds the allowable value, it is decided as malfunctioning.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) (Industrial Application Field) The present invention relates to a malfunction determination device for a material detector installed in material IFa transport equipment.

(Prior Art) In recent years, computer-controlled control of transporting and processing materials has been increasing. The basis for transmitting the vU rate is the detection signal of the conveyed material detector.

Based on this detection signal, the computer grasps the position of the material and specifies the destination of the material or processes it.

However, material detectors operating in adverse environments sometimes malfunction, which can have a significant impact on control.

For example, when high-temperature steel is rolled on a steel hot rolling line and wound into a coil, most water is used to cool the steel to a constant temperature. At this time, the material detector that detects the position of the steel material by steam or water malfunctions and an incorrect signal is input to the computer controlling it.
Computers perform incorrect control.

(Problem to be Solved by the Invention) Conventionally, in order to prevent this malfunction, material detectors have been provided with drain plates, air purges, etc. to reduce the influence of water or water vapor. It cannot be completely suppressed.

In addition, for the 31 outages to which the detection signal is input, the ON/OFF time of the detection signal is saved, and each time the detection signal is input, the previous OFF time and the current ON time ill or @ times ON time are saved. and the current OFF time, respectively, as O) formula,
For a certain period of time t1. A malfunction determination is performed using a time period for determining that a signal input within t2 is a signal due to a malfunction. Even with this method, if the material conveyance speed changes, malfunction of the monthly profit detector may not be detected.

1 Current ON time - Previous OFF time 1≦t1...(91
Current OFF time - Previous ON time 1≦t2... ■The present invention is a material detector malfunction determination device that can accurately determine whether the detection signal of a material detector installed in a material conveyance facility with adverse effects is correct or incorrect. The purpose is to provide

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a plurality of devices which are arranged at predetermined intervals in the direction of conveyance of the material conveyed by the material conveyance equipment and detect the passage of the material. monthly interest detector,
an m-feeding speed detector that detects the conveying speed of the material 1, and determining whether the detection signal is correct or incorrect based on the detection signal of the material detector, the conveying speed signal of the conveying speed detector, and the distance between the material detectors. The present invention is characterized in that it has a configuration including a correctness/incorrect determination unit.

(Function) With this configuration, it becomes possible to accurately determine and eliminate malfunctions occurring in the detection signal of the monthly profit detector.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

A speed detector 5 for detecting the lfG feeding speed of the monthly interest or the conveyance speed of the equipment is provided in the Ii & feeding equipment 4 for conveying the monthly interest 3 shown in FIG. Further, the conveying equipment 4 is equipped with a material detector 1 for detecting the position for controlling the depletion or the attachment of monthly interest.
2 will be provided. The feed speed and material detection signals are input to the sensor malfunction determination device 6 to determine whether they are correct or incorrect.As a result of the determination, only normal detection signals are output to the meter control device 7.

The material 3 is l in the direction from the vJ monthly interest detector to the material detector 2.
! a shall be sent. It is assumed that the speed detector 5 connected to the transport equipment always detects the transport speed of the equipment.

It is assumed that the sensor malfunction determination device 6 according to the present invention stores the distance of each material detector. In addition, the sensor malfunction judgment komoguchi 6 periodically detects the signal from the speed detector 5 to 1 [υ
Enter the feed speed.

From the input feed rate, the material movement per cycle is determined by the formula 0, and the current position of the monthly profit of 3 is determined by performing accumulation using the formula (f).

When the detection signal of the material 1°1 leveling device 2 is generated, the distance between the material A':1 detector 1 and the material detector 2 and the cumulative current position of the monthly interest 3 are compared with the allowable value using the formula 0.

As a result of the comparison, if the error is less than the allowable value, it is determined that the detection signal of the material detector 2 is normal.

Tolerance S: If it exceeds, it is determined that it is due to malfunction.

Δ=■・Δt...(3) Ls
= ΣΔ ... (a) where V: Conveying speed of the conveying equipment 4 Δt: Time per cycle Δ: Material movement per cycle L: From material detector 1 to material detector 2 Distance α2 Tolerance Next, other embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a diagram showing a portion of a steel hot rolling plant. The material is transported by a roller table 9.

There are several monthly rate detectors on the roller table 9 to detect the attachment of materials.

Here, the material, i.e., the 1st grain 8 heated to a high temperature, is conveyed from the detector 1 to the detector 2 by rotating the roller table 9. The roller table 9 is equipped with a speed detector 5 that converts the rotational speed into the transport speed of the roller table 9. The inter-material signal and conveyance speed detected by the material detector and the speed detector are input to the sensor malfunction determination device 〇 according to the present invention. The material spacing signal determined to be normal is input to the computer 7.

It is assumed that the inter-material signal of the material detector 1 has been input normally. This signal initializes the contents of the material movement amount accumulation memory or register in the sensor malfunction determination device 6. The steel material 8 is conveyed by rotating the roller table 9. The speed detector 5 constantly detects the conveyance speed. The sensor malfunction determination rate 6 inputs the conveyance speed of the speed detector 5 at a period of Δt, calculates the material transfer @ yarn per round, and adds it to the material movement amount accumulation memory or register. Here, it is assumed that the material detector 2 malfunctions due to steam or water even though the steel material 8 has not been reached, and outputs a material gap detection signal.

The signal is input to the vJ load signal sensor malfunction determination device 6.

At the time this inter-material signal is received, the value of the material movement amount accumulated up to now in the cumulative memory or register and the distance between material detector 1 and material detector 2 stored by the sensor malfunction determination device 6 are calculated. Comparison is performed using equation 0. If the allowable value is a small value, in this case it is determined that the malfunction has occurred, and no signal is output to the calculation number 7.

If the steel material reaches the material detector 2 normally, the error between the value in the cumulative memory or register for material movement and the distance between the material detectors will be smaller than the allowable value, so the current inter-material signal will be normal, and the signal will be sent to the computer 7. This signal is input.

The effect of this embodiment is that even if the material detector malfunctions due to water vapor or water, the malfunction can be prevented by the sensor malfunction determination device according to the present invention. input and prevent it from adversely affecting control.

(Effects of the Invention) As described above, according to the present invention, it becomes possible to determine any malfunction of the material detector installed in the material transport facility, and to stop or control the transport equipment due to the malfunction of the material detector. You can prevent it from becoming impossible.

[Brief explanation of the drawing]

1 and 2 are detailed explanatory diagrams of the present invention. 1...Material detector 2...Material detector 3...
・Materials 4...Transfer equipment 5...Transport speed detector 6...Sensor malfunction determination device 7...Calculator 8...Steel 9...Roller table agent Patent attorney Nori Chika Yudo Mitsumata Kobun Figure 1

Claims (1)

[Claims] a plurality of material detectors that are arranged at predetermined intervals in the transport direction of the material transported by the material transport equipment and detect passage of the material; a transport speed detector that detects the transport speed of the material; and a transport speed detector that detects the transport speed of the material; A malfunction determination device for a material detector, comprising: a correctness/incorrect determination unit that determines whether the detection signal is correct based on a detection signal of a detector, a conveyance speed signal of the conveyance speed detector, and a distance between the material detectors.