JPS62217120A - Measuring instrument for storage amount of granule tank - Google Patents

Abstract

PURPOSE:To measure the storage amount of a storage tank with high accuracy by measuring the height of the surface of granules in the tank at plural points. CONSTITUTION:Wires 3 are rewound by respective elevation devices 2 to lower and stop an ultrasonic sensor 4 anchored to the wires 3 at an optional position. The horizontal position of the ultrasonic sensor 4 is calculated by inputting the detection signal of a wire rewinding quantity detecting device to an arithmetic part 7. The ultrasonic sensor 4 sends an ultrasonic wave to the surface of a granule in a silo bin 1 to detect the distance to the surface, and also inputs its detection signal to the arithmetic part 7 through a receiver 9 as a radio wave signal. Further, the detection signal of the wire rewinding quantity detecting device is also inputted to the arithmetic part 7 to compute the height from the peak part of the silo bin 1 to the surface x1 of the granule 8. Then, the arithmetic part 7 computes a next measurement position x2 and moves the ultrasonic sensor 4 to the next measurement position, so that the same operation is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a storage amount measuring device for a powder storage tank such as a grain silo.

(Prior art) Conventionally, methods for measuring the amount of stored material in a powder silo include measuring the distance from the top slab at the top of the silo to the surface of the stored material, or The amount of stored items is detected by measuring the depth of stored items by attaching a sensor at each height and calculating the approximate volume.

In the former method, weight sounding, ultrasonic sensors, etc. were used to measure the distance from the top slab to the surface of the storage tank, while tuning fork sensors, rotating vane sensors, etc. were used to install the sensor on the inner wall surface. .

(Problem to be Solved by the Invention) However, all of the conventional methods described above can only measure the height of one point on the surface of the stored object, so in the case of a stored object with large undulations on the surface, the measured value of the stored amount will be large. Errors are likely to occur.

(Means for solving the problems) The present invention aims to solve these problems,
A wire lifting device disposed at a plurality of locations on the top of the storage tank, each of which is equipped with a wire unwinding amount detection device, and an operation control device for the wire lifting device that controls the amount of wire unwinding and unwinding by the wire lifting device; A surface detection member of the storage tank powder and granules attached to the tip of each wire mounted on each wire lifting device, a distance detection signal from the detection member to the surface of the powder and granules in the storage tank, or a landing signal on the same surface. inputting the detection signal of the wire unwinding amount detection device, calculating the vertical distance from the top surface of the storage tank to the surface of the powder and granular material in the storage tank, calculating the next measurement position, and issuing a command to the operation control device. It is characterized by a calculation unit configured to move the detection member to the same measurement position by moving the detection member to the same measurement position, and its purpose is to accurately measure the amount stored in the powder storage tank and to move the detection member to the same measurement position. The present invention provides a storage amount measuring device.

(Function) In the present invention, the wires mounted on each wire lifting device provided at multiple locations on the top of the silo are unwound, and the storage tank white powder detection member attached to each wire is lowered,
The detection member is stopped by the operation control device when it lands on the surface of the granular material in the tank, or is stopped at an arbitrary position, and the distance to the surface of the granular material in the tank is detected by the detection member at that position. and inputting the landing signal of the detection member or the distance detection signal to the surface of the granular material in the tank and the wire unwinding amount detection signal from the wire unwinding amount detecting device in the wire lifting device to a calculation device. , calculate the distance from the top surface of the storage tank to the surface of the granular material in the tank.

Note that the horizontal position of the detection member in the storage tank is calculated based on the detection signal of the wire unwinding amount detection device.

Next, the calculation device calculates the next measurement position, and the operation control device controls each of the plurality of wire lifting devices, and the powder and granules in the tank are attached to each wire that is wound up and rewound by each device. The surface detection member is moved to the next measurement position, the above operation is repeated again, and the distance from the top surface of the storage tank to the surface of the powder or granular material in the tank at the measurement position is measured.

Thereafter, the same operation as described above is repeated to measure the amount stored in the storage tank.

(Effects of the Invention) As described above, according to the device of the present invention, since the heights of multiple points on the surface of the powder or granular material in the storage tank are measured, it is possible to measure the storage amount with higher accuracy, and Since the sensing member is suspended by a plurality of wires, there is less risk of the sensing member falling due to wire cutting.

(Example) Hereinafter, an example in which the present invention is applied to a silo for storing powder and granular materials such as grain will be described.

1 and 2 show a first embodiment of the present invention, in which a wire unwinding amount detection device fR is installed on the top of the silo robin (1), respectively.
One pair of left and right wire lifting devices (2) equipped with (not shown)
are arranged, and each elevator is the same! An ultrasonic sensor (4) constituting the surface detection member for the storage tank meat powder granules described above is tightly attached to the tip of each wire (3) which is attached to (2) so as to be freely extended and unwound. In the figure, (5) is a guide roller.

The amount of unwinding and unwinding of the wire (3) by the wire lifting device (2) is controlled by an operation control device (6) of the wire lifting device.

In addition, (as described later, the force is the powder (
8) is a calculation unit that calculates the storage amount and the horizontal position of the sensor (4).

According to the illustrated embodiment, the granular material (8) in the silobin (1)
), each wire (3) is unwound by each lifting device (2) and the ultrasonic sensor (4) attached to the wire (3) is lowered and stopped at an arbitrary position. do.

The horizontal position of the ultrasonic sensor (4) at this time is calculated by inputting the detection signal detected by the wire unwinding amount detection device in each wire lifting device (2) to the calculation unit (force).

[The ultrasonic sensor (4) causes Cyrobin (1
) to detect Il't14i1f up to the surface, and input this detection signal as a radio wave signal to the calculation unit (7) via the receiver (9). At the same time, the detection signal from the wire unwinding amount detection device is input to the calculation unit (force), and the calculation unit (force) calculates the height from the top of the silobin (1) to the surface x1 of the powder and granular material (8). Calculate.

Next, the calculation unit (force) calculates the next measured position f?2 and sends a command signal to the operation control device (6), which controls the amount of winding and unwinding of each wire (3) by each wire lifting device (2). Adjust the ultrasonic sensor (4) to the next measurement position described above, and then repeat the same operation as above to measure the distance between the surface of the powder (8) and the top of the cyrobin (1). Then, in the same manner, measurements are taken at a plurality of locations between the left and right wire lifting devices (2) (21) to measure the storage amount of the powder and granular material (8).

According to the embodiment, the measurement range (A) of the amount of stored powder and granular material in the silobin (1) is as shown in FIG.

Left and right wire lifting equipment [(2) (This is the straight line connecting between 23.

Also, as shown in Figure 4, there are 3
When wire lifting devices (2) are installed, the particle storage amount measurement area in the silobin (1) (, /! becomes a triangular portion with each wire lifting device (2) as its apex.

FIG. 5 and FIG. 6 show a second embodiment of the present invention, in which the tips of each wire (3) are mounted on a plurality of wire lifting devices (2) arranged at the top of a silobin (1). Then, instead of the ultrasonic sensor, a weight (4) with a built-in radio wave oscillator is stacked, and the wire lifting device (2) lowers the weight (4), and the same weight (4) 1) Powder (8)
When it comes into contact with the surface of the weights (4), a radio wave signal is emitted from the four weights, inputted to the calculation unit (force) via the receiver (9), and the horizontal positions of the four weights (4 The vertical distance between the surface of the cyrobin (8) and the top of the silobin (1) is determined by the wire unwinding amount detection device of the wire lifting device (2) using the calculation unit (
7) is calculated based on the detection signal input to step 7).

Next, the calculation unit (7) calculates the next measurement position, issues a command to the operation control device (6), and sends a command to the operation control device (6) to control the weights (each of the wire lifting devices so that the four weights move to the next measurement position). (2)
control.

5. According to each of the embodiments described above, since the vertical distance between the surface of the stored powder (8) in the silobin (1) and the top of the silobin (1) is measured at multiple points, more accurate granular particles can be obtained. It is possible to measure the amount stored in the body (8), and a weight (4') with a built-in ultrasonic sensor (4) or radio wave transmitter
Since it is suspended by a plurality of wires (3), there is little risk of falling accidents due to wire cutting.

According to the first embodiment, since the storage amount of the powder (8) in the silobin (1) is carried out in a non-contact state with respect to the surface of the powder, the ultrasonic sensor (4) ) is less likely to be caught in the powder (8) and cut.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and may be modified in various designs without departing from the spirit of the present invention. be.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an embodiment of the storage amount meter a+++ device for a powder storage tank, Fig. 2 is its calculation and control system diagram, and Fig. 3
Figures 4 and 4 are plan views showing the measurement area for the storage amount of powder and granular materials, respectively;
FIG. 5 is a vertical sectional view showing another embodiment of the present invention, and FIG. 6 is a diagram of its calculation and control system (1)... Cyrobin,
(2)...Wire lifting device, (3)...Wire,
(4)...Ultrasonic sensor, (4...weights, (6)...operation control device for wire lifting device, (7)...
...Arithmetic section

Claims (1)

[Claims] A wire lifting device disposed at a plurality of locations on the top of the storage tank, each of which is equipped with a wire unwinding amount detection device, and an operation control device for the wire lifting device that controls the amount of wire unwinding and unwinding by the wire lifting device; A surface detection member of the powder or granular material in the storage tank attached to the tip of each wire mounted on each of the wire lifting devices, a distance detection signal from the detection member to the surface of the powder or granular material in the storage tank, or a landing signal on the same surface. and the detection signal of the wire unwinding amount detection device, calculate the vertical distance from the top surface of the storage tank to the surface of the granular material in the storage tank, calculate the next measurement position, and issue a command to the operation control device. What is claimed is: 1. A storage amount measuring device for a powder storage tank, characterized by comprising a calculation unit configured to emit a liquid and move the detection member to the same measurement position.