JPS5969805A - Device for controlling forecasting monitor - Google Patents

Abstract

PURPOSE:To obtain a forecasting monitor controlling device detecting a signal without time delay by forecasting a time delay signal from a prceeding signal on the basis of a correlation obtained by A/D converting outputs from plural sensors having time delay with each other and operating the signals. CONSTITUTION:The A/D converter 13 digitizes signals Ct(t), Pc(t) detected by plural sensors 10, 8 having time delay with each other. A forecasting value operating device 14 synchronizes the digitized signals and then calculates Ct= f(Pc) to find out the relation between Ct and Pc. From the output signal Pc(t) of the preceeding sensor, an output signal Cte of the sensor with time delay is calculated. While repeating said operation, the results are outputted to apparatus such as indicator 15 and a controlling device 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a predictive monitoring control device, and in particular to a predictive monitoring control device, in particular, it is possible to advance a time-delayed operation information signal among operation information signals detected from various parts of a controlled object (for example, a dredging device, various plants, etc.) during operation. The present invention relates to a predictive monitoring control device that performs predictive calculations based on correlations from other driving information signals and uses the results for monitoring or controlling the driving of a controlled object.

Conventionally, for example, the gamma ray method has been adopted as a mud content meter for dredging vessels, but the detector installation depends on the position, and processing to compensate for data variations is required, so the cutter actually detects the soil being excavated. There is a time delay with respect to the gold rate. Therefore, in the past, it was impossible to maintain a constant gold slurry ratio.

For example, in order to automate the cutter dredger as described above, it is necessary to detect the gold mud ratio of the earth and sand being actually excavated by the cutter without any time delay in order to automatically operate the swing speed. However, as mentioned above, there was no known device that could actually detect the gold mud ratio of the earth and sand being excavated by a cutter without any time delay, so automation of dredging vessels could not be promoted.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a predictive monitoring control device that can detect signals with a time lag without time delay.

The predictive monitoring control device according to the present invention includes a plurality of sensors attached to a detected object so as to detect driving information signals with a time delay, a converter that receives signals from the sensors and converts them into digital data, and a converter that converts the signals into digital signals. The present invention is characterized by comprising a predicted value calculation device which receives a digital signal from a converter and performs predictive calculation based on a correlation between a time-delayed signal and other preceding signals.

An embodiment in which the present invention is applied to a cutter suction dredging device will be described in detail with reference to the drawings.

Fig. 1 is a schematic diagram showing the general configuration of a cutter suction dredging device, Fig. 2 is a diagram showing a record of operating information signals detected from each sensor in Fig. 1, and Fig. 3 is a diagram showing an embodiment of the present invention. FIG. 4 is a block diagram showing a schematic configuration; FIG. 4 is a flowchart showing the operation of the embodiment shown in FIG. 3;

In Fig. 1, 1 is the hull, 2 is a suction ladder, 3 is a cutter at the tip of the suction ladder, 4 is an electric motor for driving the cutter, 5 is a dredging pump, 6 is a suction pipe leading from the cutter 3 to the dredging pump 5, and 7 8 is a cutter load (power) detection sensor attached to the cutter drive electric motor 4, and 9 is a pump suction negative installed at the pon noshi position of the mud suction pipe 6. A pressure detection sensor 10 is a sensor for detecting the gold mud ratio of muddy water in the pipe attached to the mud drainage pipe 7, 11 is a water surface, and 12 is subsoil to be dredged.

In FIG. 3, 13 is a converter for inputting signals from the cutter load detection sensor 8 and the gold mud ratio detection sensor 1° on the hull 1; 14 is a digital signal from the converter 13;
The cutter load signal Pc (t
), 15 is a predicted value calculating device consisting of a computer that performs predictive calculations based on the correlation; 15 is the calculated predicted gold ratio C;
16 is a control device for a ladder winch, a spincline winch, etc. related to the gold mud rate adjustment operation, and 17 is a gold mud rate prediction device section consisting of A power converters 1 and 3 and a predicted value calculation device 14.

Figure 2 shows an example of a record of operation information signals detected by each sensor 8, 9, and 10, where the horizontal axis is time, the vertical axis PC is the cutter load signal transmitted from sensor 8, and the vertical axis is the cutter load signal transmitted from sensor 8. HSV is the suction negative pressure signal transmitted from sensor 9,
C4 on the vertical axis is a signal of the gold mud rate transmitted from the sensor 10. Each signal PC+Hsv, (4 is each sensor 8,
9. Due to the mounting position in 10 and other reasons, a time delay td occurs in the order of PC2Hsv and Ct as shown in the second diagram.

Next, the operation of the embodiment of the present invention shown in Fig. 3 will be explained. Fig. 3 shows the present invention when predicting the gold mud rate signal Ct from the cutter load signal PC of the dredging device shown in Fig. 1. This is an example of a hull 1 of a detected object (controlled object).
The analog signal Ct(t) detected by the cutter load detection sensor 10 attached to the cutter load detection sensor 10 and the analog signal Pc(t) detected by the cutter load detection sensor 8 are sent to the respective converters 13. The predicted value arithmetic unit 14 inputs the predicted value into the predicted value calculation device 14. This predicted value calculation device 14 synchronizes each signal [Ct(t)] and (Pc(t):) denotated by the converter 13 as shown in the flowchart of FIG. The relationship with Ct = f (
Pc) is calculated, and then the predicted gold ratio calculation Cte = ,
f[Pc(t)) is calculated. These calculations are repeatedly performed, and the results are output to the predicted gold deposit ratio indicator 15, the related control device 16, and other various devices.

In view of the above, according to the present invention, it is possible to perform continuous calculations at high speed using a computer and eliminate time delays in signals, so that an excellent effect can be obtained, such as enabling automatic operation with a constant gold ratio.

In the embodiment of the present invention shown in FIG. 3, if the suction negative pressure detection sensor 9 shown in FIG. 1 is used instead of the cutter load detection sensor 8, the sensor 9 shown in FIG. The calculation formulas are Ct=f(Hsv) and Cte ” f(Hsv(
t)], and the predicted gold ratio Cte is calculated in the same way as above.
can be output.

Furthermore, as other elements in the dredging equipment, for example, signals of swing winch rotation and suction negative pressure are transmitted through sensors 8 and 8 shown in FIG.
If used in place of 10, the suction negative pressure can be predicted and calculated, thereby making it possible to perform dredging operation control to keep the suction negative pressure constant.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and includes, for example, not only the gold mud ratio and cutter load, but also suction negative pressure and gold mud ratio, swing winch rotation, and suction negative pressure. If the signals have a certain relationship with each other, but there is a time lag, it can be applied to the detection.Furthermore, the object to be detected is not limited to the dredging equipment mentioned above; It can be widely applied to operation monitoring and control of various plants that handle signals that are related in some way but have a time lag.

In short, according to the present invention, a plurality of sensors are added to a detected object so as to detect driving information signals each having a time delay, a converter that receives signals from the sensors and converts them into digital signals, and a converter that receives signals from the sensors and converts them into digital signals. /l) A predicted value calculation device that receives a digital signal from a converter and calculates a predicted value based on the correlation between the signal with a time delay and other signals that precede it. The present invention is extremely useful industrially because it provides a predictive monitoring control device that can detect without time delay.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the general configuration of a cutter suction dredging device, Fig. 2 is a diagram showing a record of operating information signals detected from each sensor in Fig. 1, and Fig. 3 is a diagram showing an embodiment of the present invention. 4 is a Zorock diagram showing a schematic configuration, and FIG. 4 is a flowchart showing the operation of the embodiment shown in FIG. 3. DESCRIPTION OF SYMBOLS 1... Hull, 2... Suction ladder, 3... Cutter at the tip of suction ladder, 4... Electric motor for driving cutter, 5... Dredging pump, 6... Sludge suction pipe, 7...・
・Sludge drainage pipe, 8, 9. 10... each sensor, 1... water surface, 12... subsoil, 13... converter, 14...
- Predicted value calculation device, 15...display meter, 16...control device, 17...gold ratio prediction device part. Patent Attorney Takeshi Suzue Chapter 1 Figure 2 Time Page 1 continuation 0 Inventor Masao Nakayama Mitsubishi Heavy Industries, Ltd. Hiroshima Shipyard, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City 0 Inventor Hidehiko Sakuragi, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Mitsubishi Heavy Industries, Ltd. Hiroshima Research Center 0 Inventor Kazuko Takeshita, Mitsubishi Heavy Industries, Ltd. Hiroshima Research Center, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City

Claims (1)

[Claims] A plurality of sensors are attached to the object to be detected so as to detect driving information signals each having a time delay, an A/D converter that receives signals from the sensors and converts them into digital data, and an A/D converter that converts signals from the converters into digital signals. 1. A predictive monitoring control device comprising: a predicted value calculation device that receives a digital signal and performs predictive calculation based on a correlation between a signal with a time delay and other preceding signals.