JPH034895Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for measuring the amount of granular materials such as sand, grain, and pachinko balls stored in a sealed tank or the like. The present application can also be used to observe the accumulation of sludge and sediment in dams, drainage canals, etc.

<Prior Art> As an example of the above-mentioned apparatus, a photoelectric sand level gauge shown in FIG. 2 has been used in the past. This device has an external appearance as shown in Figure A, and a sensor section 2 as shown in Figure B.
A light emitter 3-1 and a light receiver 3- are placed inside the notch 2-1.
2 are provided facing each other to form a sensor pair (3). These light emitter 3-1 and light receiver 3
-2 are provided inside the sensor section 2, and the optical axis 3-3 between the emitter and the receiver is located at the notch 2.
It is made to pass through the space of -1. A recording section 1 is provided at the upper end of the above-mentioned sensor section.

Note that the light emitter 3-1 uses an infrared light emitting diode to avoid the influence of fine suspended matter, and the light receiver 3-1
-2 uses a phototransistor.

These sensor pairs 3 are provided with light receivers 3 on the upper surface of the notches 2-1 provided at regular intervals in the sensor part 2 so that the optical axis 3-3 is parallel to the center line of the sensor part 2. -2, light emitter 3 on the bottom surface
-1 is provided. The lower surface of the notch 2-1 is a slope to prevent accumulation, so that when the sand level is lowered and exposed to the air, all the sand that has entered the notch 2-1 slides down.

When the sensor unit 2 of such a device is inserted into the sand, the sensor pair 3 will move up and down the sand surface.
The optical axis 3-3 is blocked by the sand below the sand surface, and is exposed in the air above the sand surface, so the receiver 3-2 of the sensor pair 3 located in the air can generate an output. .

When the sensor pair 3 from the recording section 1 is sequentially operated from the bottom to the top or from the top to the bottom in a device in such a state, no output is generated from the sensor pair 3 in the sand, and the sand surface is Since output is generated from the sensor pair 3 exposed in the air above, the position of the sand surface can be easily measured.
Normally, this measurement is performed intermittently at regular intervals.

However, although the sensor part 2 of such a device does not have a protruding part to the outside and can be easily inserted into the sand, the notch part 2 cannot be inserted into the sand unless the sand is completely dry and smooth.
-1 has the disadvantage that when the sand level drops and is exposed in the air, it is difficult for all the sand to slide down.

<Problem to be solved by the invention> The invention was made to solve the above-mentioned problem.The problem is that an object blocking light is placed on the optical axis of the sensor pair exposed in the air due to the lowering of the sand surface. An object of the present invention is to provide an improved device with a sensor section that does not leave any residue.

<Means for solving the problem> The present invention is a measuring device that measures the storage amount in a tank for storing granular materials such as sand and the amount of deposits such as earth and sand. It consists of a rod-shaped sensor part 4 and a recording part 1 provided at the upper end of this sensor part 4. Two jetties 4-1, 4-1 protruding in the same direction are provided, and each jetty 4-1 has a plurality of light-emitting lights located inside one jetty 4-1 at a plurality of positions facing each other at regular intervals. The vessel 4-2 is provided facing the other jetty 4-1,
Inside the other proposition 4-1, there is a light receiver 4-1.
3 is provided facing the one jetty 4-1, and the optical axis 4-4 between the light emitter 4-2 and the light receiver 4-3 facing each other is connected to the two jetties 4-1, 4-. 1
The space between them is provided so as to pass through in a direction perpendicular to the center line of the sensor section 4.

<Function> As mentioned above, due to the lowering of the sand surface, there are no protrusions that would prevent the sand from sliding down, and no objects remain that would block the optical axis of the sensor pair exposed in the air.

<Embodiment> FIG. 1 is an external view of an embodiment of the present invention, in which A is an overall view and B is a sectional view of a sensor pair portion of a sensor section. A sensor section 4 is provided in a straight line below the recording section 1. Two jetties 4-1 parallel to the center line are provided in this sensor section 4 so as to face each other, and light emitters 4-2 are placed inside the jetties at regular intervals and at positions facing each other. and receiver 4
-3 is provided, and the optical axis 4-4 passes through the space between the two jetties in a direction perpendicular to the center line of the sensor section 4.

Note that the structure and operation of the recording section 1 are the same as in the conventional example.

<Effects of the invention> As mentioned above, there are no intermittent protrusions or notches that would prevent sand from sliding down, so no residue remains on the optical axis of the sensor pair exposed in the air, reducing measurement errors. does not occur.

The device of this invention does not have any obstacles for relatively large granular objects such as grains or pachinko balls to slide down, so it can be used in storage tanks for large granular objects, storage tanks for liquids that do not transmit light, dams, and drainage channels. It can also be used to observe the accumulation of sludge and sediment.

[Brief explanation of the drawing]

Fig. 1 is an external view of the device of the present invention, A is an overall view, B is a sectional view of the sensor pair part of the sensor section, and Fig. 2 is an external view of a conventional device, A is an overall view, and B is a sensor It is a construction diagram of the sensor pair part of the 1...Recording section, 4...Sensor section, 4-1...
Jetty, 4-2... Emitter, 4-3... Light receiver.

Claims (1)

[Scope of utility model registration request] In a measuring device that measures the amount of storage in a tank that stores granular materials such as sand and the amount of deposits such as earth and sand, there is a rod-shaped sensor part that is inserted vertically into the stored material or deposit, and the upper end of this sensor part. The sensor part is provided with two jetties on one side of the sensor part that protrude in the same direction so as to be parallel to the center line of the sensor part and to face each other. A light emitting device is provided inside one jetty each facing the other jetty at a plurality of positions facing each other at regular intervals, and a light receiver is provided inside the other jetty each facing the one jetty, A photoelectric sand surface characterized in that the optical axis between the light emitting device and the light receiver facing each other is provided so as to pass through the space between the two jetties in a direction perpendicular to the center line of the sensor section. Total.