JP6752893B2 - Water level temperature measuring device - Google Patents

Description

The present invention relates to a water level temperature measuring device that is installed on a laminated body in which a liquid is laminated on a viscous body, measures the water level of the liquid, and measures the temperature of the viscous body.

In recent years, IoT (Internet of Things) has been promoted in each field, and in the industrial field, there is an increasing demand for the development of a system for monitoring changes in coastal water level and soil temperature and a system for monitoring changes in dam reservoir capacity. In the fishery sector, there is an increasing demand for the development of systems to monitor fish farming. Also in the agricultural field, there is an increasing demand for the development of a system for grasping the agricultural environment.

In particular, in rice cultivation in the agricultural field, it is necessary to diligently manage the water level of paddy fields and the temperature of mud layers from rice planting to harvesting in order to equalize the quality of rice and improve the yield of rice. There is.
Therefore, for farmers who own many paddy fields, it is an issue to improve the efficiency of the labor for managing the paddy fields, and there is a demand for IoT of paddy field management in rice cultivation.
Then, in order to promote the IoT of paddy field management, a device capable of easily and accurately measuring the water level and mud temperature of the paddy field is required.

As a soil measuring device for monitoring and measuring the condition in the soil under the ground surface, there is one disclosed in Patent Document 1. This soil measuring device has a rod portion inserted into the soil (viscous body), and a plurality of sensors are arranged at predetermined intervals in the depth direction in the rod portion, and for example, humidity at the depth is measured by a sensor. It is a measuring device.

Japanese Unexamined Patent Publication No. 2015-114319

By the way, with the above-mentioned soil measuring device, for example, humidity of soil (viscous body) can be measured, but water level information of soil at the measuring point cannot be acquired. When measuring the water level and mud temperature at a predetermined point of a laminated body in which water and mud are laminated, such as in a paddy field, it is necessary to install a water level measuring device that acquires water level information in addition to the above soil measuring device. is there. Therefore, the number of measuring devices to be used increases, and the handling and management of the measuring devices becomes complicated.

The present invention has been made in view of such circumstances, and an object of the present invention is to measure the water level and the temperature of the viscous body at a predetermined point of the laminated body in which the liquid is laminated on the viscous body. It is an object of the present invention to provide a water level temperature measuring device capable of easily acquiring measurement data and reducing the number of measuring devices used.

In order to achieve the above object, the water level temperature measuring device of the present invention is a water level temperature measuring device that measures the water level of the liquid and the temperature of the viscous body in the laminated body in which the liquid is laminated on the viscous body. A sensor unit installed in the laminated body is provided, and at least one water level sensor for measuring the water level of the liquid is mounted on the upper side of the sensor unit, and the temperature of the viscous body is measured on the lower side. It is characterized in that at least one temperature sensor for measurement is mounted.

According to this configuration, when measuring the water level of the liquid and the temperature of the viscous body at a predetermined point of the laminated body in which the liquid is laminated on the viscous body, the water level and the temperature can be measured at the same time with one measuring device. , Water level and temperature measurement data can be easily acquired, and the number of measuring devices used can be reduced.

Preferably, in the present invention, the sensor unit is incorporated in a tubular housing, and the housing is formed with a liquid inlet through which the liquid flows into the mounting position of the water level sensor, and the viscous body. Is characterized in that a viscous body inflow port is formed so as to flow into the mounting position of the temperature sensor.
According to this configuration, the liquid smoothly flows into the mounting position of the water level sensor incorporated in the housing, and the viscous body smoothly flows into the mounting position of the temperature sensor. Therefore, the water level of the liquid in the laminated body and the temperature of the viscous body can be measured easily and accurately.
In addition, since the housing is formed in a tubular shape, the housing can be smoothly inserted into the viscous body without resistance and embedded, so that damage to the water level sensor and temperature sensor incorporated in the housing can be prevented. Can be done.

Preferably, the present invention is characterized in that two temperature sensors are arranged at predetermined intervals in the depth direction of the sensor unit.
According to this configuration, when measuring the temperature of a viscous body, even if one of the temperature sensors fails, the temperature can be continuously measured by the other temperature sensor, so that the water level is measured every time the temperature sensor fails. It is not necessary to remove the temperature measuring device from the laminate, and the water level temperature measuring device can be easily handled.
Further, since the temperature of the viscous body can be measured at two points in the depth direction of the layer of the viscous body, the temperature of the viscous body at a predetermined point can be accurately measured.

Preferably, in the present invention, the viscous body discharge port is provided on the upper side of the viscous body inflow port in the housing, and the mounting position of the water level sensor and the mounting position of the temperature sensor of the sensor unit are It is characterized in that an inclined guide portion for guiding the viscous body flowing into the housing from the viscous body inflow port to the viscous body discharge port is provided between them.
According to this configuration, when the housing is embedded in the layer of the viscous body, the viscous material that has flowed into the temperature sensor side in the housing is discharged to the outside of the housing along the inclination guide portion. Therefore, it is possible to prevent the viscous body from flowing into the water level sensor side in the housing, so that damage to the water pressure sensor can be prevented.

Preferably, the present invention is characterized in that the housing is provided with an umbrella portion that abuts on the upper surface of the viscous body and defines the embedding depth of the housing in the laminated body.
According to this configuration, the umbrella portion can easily define the point where the water level of the liquid is zero.

Preferably, the present invention is characterized in that the water level sensor is arranged at the position of the lower end of the umbrella portion.
According to this configuration, the water pressure at the point where the water level of the liquid is zero can be measured, and the water level can be measured accurately.

Preferably, the present invention is characterized in that the liquid is paddy water and the viscous body is mud on which paddy water is laminated.
According to this configuration, the water level and the mud temperature at a predetermined point in the paddy field can be measured at the same time by one water level temperature measuring device, so that the measurement data of the water level and the mud temperature of the paddy field can be easily acquired. Can be done.

According to the present invention, when measuring the water level of the liquid and the temperature of the viscous body at a predetermined point of the laminated body in which the liquid is laminated on the viscous body, the measurement data of the water level and the temperature can be easily acquired. , It is possible to provide a water level temperature measuring device that can reduce the number of measuring devices used.

It is the schematic which shows the installation state of the water level temperature measuring apparatus which concerns on embodiment of this invention. It is external perspective view of the water level temperature measuring apparatus. It is a partial notch side view which shows the built-in state of the sensor unit of a water level temperature measuring apparatus. It is a perspective view which looked at the water level temperature measuring apparatus from the bottom side. It is a perspective view of the sensor unit of a water level temperature measuring apparatus. It is an exploded perspective view of the sensor unit of a water level temperature measuring device. It is sectional drawing of the main part for demonstrating the flow of a liquid and a viscous body flowing into a water level temperature measuring apparatus.

Hereinafter, the water level temperature measuring device according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing an installed state of a water level temperature measuring device according to an embodiment of the present invention. FIG. 2 is an external perspective view of the water level temperature measuring device. FIG. 3 is a partially cutaway side view showing a built-in state of the sensor unit of the water level temperature measuring device. FIG. 4 is a perspective view of the water level temperature measuring device as viewed from the bottom surface side. FIG. 5 is a perspective view of the sensor unit of the water level temperature measuring device. FIG. 6 is an exploded perspective view of the sensor unit of the water level temperature measuring device. FIG. 7 is a cross-sectional view of a main part for explaining the flow of water and mud in a paddy field flowing into a water level temperature measuring device.

As shown in FIG. 1, the water level temperature measuring device 1 according to the embodiment of the present invention is installed in a paddy field 50 which is a laminated body in which liquid water 51 is laminated on mud 52 which is a viscous body. The water level of the paddy field 50 and the temperature of the mud 52 of the paddy field 50 are measured.

(Overall configuration of water level temperature measuring device)
As shown in FIGS. 2 to 4, the water level temperature measuring device 1 has a tubular housing 2 made of synthetic resin and a long and thin sensor unit 3 incorporated in the housing 2. A water level sensor 32 for measuring the water level of the paddy field 50 is mounted on the upper side of the sensor unit 3, and a first temperature sensor 34 and a second temperature sensor 35 for measuring the temperature of the mud 52 are mounted on the lower side. Has been done.

(Case)
The inside of the housing 2 is divided into an upper region 4 in which the water level sensor 32 is arranged and a lower region 5 in which the first temperature sensor 34 and the second temperature sensor 25 are arranged.

An umbrella portion 6 that defines the embedding depth of the mud 52 of the paddy field 50 into the layer is integrally formed on the upper side of the housing 2. The umbrella portion 6 has a disk-shaped bottom plate portion 7, and the housing 2 is inserted into the central portion of the bottom plate portion 7. An annular side plate portion 8 is formed on the outer periphery of the bottom plate portion 7 so as to project upward. A plurality of side plate side water communication ports 8A are formed in the side plate portion 8 at equal intervals in the circumferential direction. On the upper surface of the bottom plate portion 7, four reinforcing plates 7A are formed at equal intervals in the circumferential direction so that the annular side plate portion 8 is not distorted. Between the lower surface 7E of the bottom plate portion 7 and the outer peripheral surface of the housing 2, four triangular reinforcing plates 7B are provided on the housing 2 so that the umbrella portion 6 does not shift with respect to the housing 2. They are formed at equal intervals in the circumferential direction.

At the base end portion of the housing 2 projecting upward from the upper surface of the bottom plate portion 7 of the umbrella portion 6, a first water flow serving as a liquid inlet for pouring the water 51 of the paddy field 50 into the upper region 4 in the housing 2 The inlet 2A and the second water inlet 2B (see FIG. 7) are formed so as to face each other in the radial direction of the housing 2.

In the bottom plate portion 7 of the umbrella portion 6, the first bottom plate side water communication port 7C and the second bottom plate side water communication port 7D are formed vertically through at positions adjacent to the first water inflow port 2A and the second water inflow port 2B. ing.
In the housing 2, a slit-shaped measurement opening 2C is formed from the first water inflow port 2A to the lower end 2a of the housing 2. The lower side of the measurement opening 2C is a mud inflow port 2D for pouring the mud 52 of the paddy field 50 into the lower region 5. Further, on the lower side of the housing 2, slit-shaped mud inflow ports 2D for pouring the mud 52 into the lower region 5 are formed at predetermined intervals in the circumferential direction of the housing 2.
The lower end 2a of the housing 2 is formed to be tapered, and the housing 2 can be easily embedded in the layer of mud 52.

When the housing 2 is embedded in the mud 52 layer of the paddy field 50 and the lower surface 7E of the bottom plate 7 of the umbrella portion 6 comes into contact with the surface 52A of the mud 52 layer of the paddy field 50, the bottom plate 7 of the umbrella portion 6 The resistance of the layer of mud 52 is added. Then, the housing 2 cannot be further embedded in the mud 52 layer, and the embedding depth of the housing 2 in the mud 52 layer is defined. That is, the housing 2 is embedded in the layer of mud 52, the lower surface 7E of the bottom plate portion 7 of the umbrella portion 6 abuts on the surface 52A of the layer of mud 52, and the housing 2 is further embedded in the layer of mud 52. The position where the water level of the paddy field 50 is zero is the position where the paddy field 50 cannot be used.

(Sensor unit)
The sensor unit 3 is detachably incorporated in the housing 2.
As shown in FIGS. 5 and 6, the sensor unit 3 has a vertically long sensor holding member 30 formed of synthetic resin, a vertically long printed circuit board 31 assembled to the sensor holding member 30, and a printed circuit board 31. It has a unit cover 33 attached to the sensor holding member 30 so as to cover the water level sensor 32 mounted on the upper side of the.

The water level sensor 32 includes a pressure sensor and measures the water pressure at the measurement point. Then, the water level of the paddy field 50 is measured by comparing the measured water pressure with the atmospheric pressure.

In the present embodiment, one water level sensor 32 is mounted on the printed circuit board 31, but in the present invention, two water level sensors are mounted on the printed circuit board 31, and the water level of either one is mounted. The sensor may be configured to be used as a substitute water level sensor when the other water level sensor fails, and the number of water level sensors mounted on the printed circuit board 31 is not limited.

A first temperature sensor 34 and a second temperature sensor 35 are mounted on the lower side of the printed circuit board 31 at a predetermined distance in the depth direction. In the present embodiment, the first temperature sensor 34 is mounted on the printed circuit board 31 at a position 5 cm below the water level sensor 32, and the second temperature sensor 35 is 5 cm below the first temperature sensor 34. It is mounted on the side position.
A cable 10 for sending the measurement data measured by the water level sensor 32 and the temperature sensors 34 and 35 to an external control unit (not shown) is attached to the printed circuit board 31.

Since two temperature sensors, that is, a first temperature sensor 34 and a second temperature sensor 35, are mounted on the printed circuit board 31, when one of the temperature sensors fails, the other temperature sensor can be used. , The temperature of the mud 52 can be continuously measured. Therefore, it is not necessary to replace the water level temperature measuring device with a new one every time the temperature sensor fails, and the handling of the water level temperature measuring device 1 becomes easy.

Further, since the first temperature sensor 34 and the second temperature sensor 35 are mounted at a predetermined distance in the depth direction, it is possible to measure the temperature at two points in the depth direction of the mud 52. Therefore, the temperature of the mud 52 at a predetermined point of the paddy field 50 can be accurately measured.

In the configuration of the present embodiment, two temperature sensors, that is, a first temperature sensor 34 and a second temperature sensor 35 are mounted on the printed circuit board 31, but the present invention is on the printed circuit board 31. It is sufficient that at least one temperature sensor is mounted on the printed circuit board 31, and the number of temperature sensors mounted on the printed circuit board 31 is not limited.

A vertically long protective sheet 36 is attached to the printed circuit board 31 on which the water level sensor 32 and the temperature sensors 34, 35 are mounted by an adhesive, and the water level sensor 32, the temperature sensors 34, 35, and the printed circuit board 31 are attached. The above circuit is waterproof.

A unit cover 33 that covers the water level sensor 32 mounted on the printed circuit board 31 is attached to the sensor holding member 30. Slit-shaped first cover side water inlet 33A, second cover side water inlet 33B, and third cover side for pouring water 51 of paddy field 50 into the upper region 4 in the unit cover 33 on both left and right side surfaces of the unit cover 33. Water inlets 33C are formed at predetermined intervals in the vertical direction of the unit cover 33.

In the sensor unit 3, the printed circuit board 31 on which the water level sensor 32 and the temperature sensors 34 and 35 are mounted faces the measurement opening 2C formed in the housing 2, and the water level sensor 32 faces the umbrella portion 6. It is incorporated in the housing 2 so as to be held at the position of the lower end of the bottom plate portion 7 (the position where the water level is zero).
Further, the sensor unit 3 is supported in the housing 2 so that a gap 2F is formed between the inner wall of the housing 2 and the sensor unit 3 by the supporting ribs 2E protruding from the inner wall of the housing 2. Has been done.

A hook portion 2G is integrally formed in the housing 2 so as to face the measurement opening 2C. A locking recess 33D on which the hook portion 2G is hooked is formed in the lower portion of the front portion of the unit cover 33. The sensor unit 3 is positioned and fixed in the housing 2 by hooking the hook portion 2G on the locking recess 33D.

In the water level temperature measuring device 1 of the present embodiment, the sensor unit 3 is detachably incorporated in the housing 2, but the present invention is incorporated so that the sensor unit cannot be removed from the housing 2. It may be the one that has been used.

In the housing 2, a pair of mud discharge ports 2H and 2H serving as viscous material discharge ports are formed on both the left and right sides of the hook portion 2G located above the mud flow port 2D.
In the sensor unit 3, the mud 52 that has flowed into the lower region 5 in the housing 2 is guided from the mud inflow port 2D to the mud discharge ports 2H and 2H on the lower end surface of the unit cover 33 that covers the water level sensor 32. The tilt guide portion 33E is formed.

(Action of water level temperature measuring device)
When the water level temperature measuring device 1 is installed in the paddy field 50, the housing 2 is inserted into the water of the paddy field 50 from the lower end 2a side. Then, the housing 2 is inserted into the layer of mud 52 and embedded.
When the lower end 2a side of the housing 2 is inserted into the water, the water surface 51A of the paddy field 50 comes into contact with the lower surface 7E of the bottom plate portion 7 of the umbrella portion 6. When the water surface 51A of the paddy field 50 comes into contact with the lower surface 7E of the bottom plate portion 7 of the umbrella portion 6, a resistance force is generated against the insertion of the housing 2, but the housing 2 is further submerged in water against the resistance force. I will insert it.

Then, the water 51 flows from the first bottom plate side water communication port 7C and the second bottom plate side water communication port 7D to the upper side of the bottom plate portion 7 of the umbrella portion 6.
The water 51 flows from the first bottom plate side water communication port 7C and the second bottom plate side water communication port 7D to the upper side of the bottom plate portion 7 of the umbrella portion 6, and at the same time, the water 51 also flows from the side plate side water communication port 8A to the bottom plate portion of the umbrella portion 6. It flows to the upper side of 7.

Then, when the housing 2 is further inserted into water, the water 51 on the upper side of the bottom plate portion 7 of the umbrella portion 6 becomes the first water inflow port 2A and the first water inflow port 2A as shown in the direction of arrow A1 and the direction of arrow A2 in FIG. It flows from the second water inflow port 2B into the upper region 4 in the housing 2 through the gap 2F formed between the inner wall of the housing 2 and the sensor unit 3.
As shown in the directions of arrows B1 and B2 in FIG. 7, the water 51 that has flowed into the upper basin 4 of the housing 2 is the first cover side water inflow inlet 33A formed on the left and right side surfaces of the unit cover 33 of the sensor unit 3. And, it flows into the unit cover 33 from the water inflow port 33B on the second cover side. Then, the water 51 flows to the position of the water level sensor 32 mounted on the upper side of the printed circuit board 31. The water 51 has a structure in which the water 51 also flows into the unit cover 33 from the water inflow port 33C on the third cover side. In FIG. 7, the illustration of the water inflow port 33C on the third cover side is omitted.

Then, when the lower end 2a of the housing 2 is inserted into the layer of the mud 52 and embedded, the mud 52 flows from the mud inflow port 2D of the housing 2 into the lower region 5 in the housing 2.
By providing the first water inflow port 2A and the second water inflow port 2B in the housing 2 in this way, the water 51 can be smoothly poured into the mounting position of the water level sensor 32 incorporated in the housing 2. Further, by providing the mud inflow port 2D, the mud 52 can be smoothly poured into the mounting positions of the temperature sensors 34 and 35 incorporated in the housing 2. Therefore, the water level of the paddy field 50 and the temperature of the mud 52 can be measured easily and accurately.

When the mud 52 flows into the lower region 5 of the housing 2, and the mud 52 is packed in the lower region 5 by a predetermined amount, the mud 52 further flowing into the lower region 5 is shown in the direction of arrow C in FIG. The mud 52 is guided to the mud discharge ports 2H and 2H of the housing 2 along the inclined guide portion 33E formed on the lower end surface of the unit cover 33, and the mud 52 is discharged to the outside of the housing 2. Therefore, it is possible to prevent the mud 52 from flowing from the lower region 5 into the upper region 4, that is, the mud 52 from flowing into the water level sensor 32 side. Therefore, it is possible to prevent damage to the water pressure sensor 32 arranged in the upper region 4.

Installation of the water level temperature measuring device 1 in the paddy field 50 by embedding the housing 2 in the mud 52 layer until the lower surface 7E of the bottom plate portion 7 of the umbrella portion 6 abuts on the surface 52A of the mud 52 layer of the paddy field 50. Is completed.
By embedding the housing 2 in the mud 52 in this way, the water level sensor 32 is placed at a position where the water level is zero.
The water level at the measurement point can be measured by measuring the water pressure at the zero water level position by the water level sensor 32 arranged at the zero water level position and comparing the water pressure at the zero water level position with the atmospheric pressure.
Further, the temperature of the mud 52 can be measured by the first temperature sensor 34 and the second temperature sensor 35 arranged in the lower region 5 of the housing 2.

According to the present embodiment, the water level at a predetermined point of the paddy field 50 and the temperature of the layer of the mud 52 can be measured at the same time by one water level temperature measuring device 1, so that the measurement data of the water level of the paddy field 50 and the temperature of the mud 52 Can be easily obtained, and the number of measuring devices used can be reduced.
Further, since the housing 2 is formed in a tubular shape, when the housing 2 is embedded in the layer of mud 52, the housing 2 can be smoothly inserted and embedded without resistance. Therefore, it is possible to prevent damage to the water level sensor 32, the first temperature sensor 34, and the second temperature sensor 35 incorporated in the housing 2.

The water level temperature measuring device 1 of the present embodiment measures the water level of the paddy field 50 and the temperature of the layer of the mud 52, but the present invention is not limited to the paddy field 50, and the water level of the coast, the temperature fluctuation of the soil, and the dam. It is applied to those which measure the water level of the liquid and the temperature of the layer of the viscous body by installing the liquid on the laminated body which is laminated on the viscous body, such as the fluctuation of the water storage amount of the above.

The water level temperature measuring device 1 according to the present embodiment measures the water level of the paddy field 50 and the temperature of the layer of the mud 52, but the present invention is not limited to the paddy field 50, and the water level of the coast and the temperature fluctuation of the soil can be measured. It is applied to those that measure the water level of the liquid and the temperature of the layer of the viscous body by installing it in a laminated body in which the liquid is laminated on the viscous body, such as fluctuations in the amount of water stored in a dam.

The present invention is not limited to the embodiments described above. That is, one of ordinary skill in the art may make various changes, combinations, sub-combinations, and alternatives with respect to the components of the above-described embodiments within the technical scope of the present invention or the equivalent thereof.

The present invention is applied to measure the water level of a liquid at a predetermined point of a laminate in which a liquid is laminated on a viscous body and the temperature of a layer of the viscous body.

1 ... Water level temperature measuring device 2 ... Housing 2A ... 1st water inlet 2B ... 2nd water inlet 2D ... Mud inlet 2H ... Mud outlet 3 ... Sensor unit 6 ... Umbrella 32 ... Water level sensor 34 ... 1st temperature sensor 35 ... 2nd temperature sensor 50 ... Paddy field 51 ... Water 52 ... Mud 52A ... Top surface

Claims (7)

A water level temperature measuring device for measuring the water level of the liquid and the temperature of the viscous body in the laminated body in which the liquid is laminated on the viscous body.
It has a sensor unit installed in the laminated body, and at least one water level sensor for measuring the water level of the liquid is mounted on the upper side of the sensor unit, and the temperature of the viscous body is measured on the lower side. A water level temperature measuring device equipped with at least one temperature sensor for this purpose. The sensor unit is incorporated in a tubular housing, and the housing is formed with a liquid inlet through which the liquid flows into the mounting position of the water level sensor, and the viscous body flows into the mounting position of the temperature sensor. The water level temperature measuring device according to claim 1, wherein a viscous body inflow port is formed. In the housing, a viscous body discharge port is provided on the upper side of the viscous body inflow port, and from the viscous body inflow port between the mounting position of the water level sensor and the mounting position of the temperature sensor of the sensor unit. An inclined guide portion is provided to guide the viscous body that has flowed into the housing to the viscous body discharge port.
The water level temperature measuring device according to claim 2 . The water level temperature measuring device according to claim 2 or 3 , wherein an umbrella portion that comes into contact with the upper surface of the viscous body and defines the embedding depth of the housing in the laminated body is provided in the housing. The water level sensor is arranged at the lower end of the umbrella portion.
The water level temperature measuring device according to claim 4 . The water level temperature measuring device according to any one of claims 1 to 5, wherein two temperature sensors are arranged at predetermined intervals in the depth direction of the sensor unit. The water level temperature measuring device according to any one of claims 1 to 6, wherein the liquid is water from a paddy field and the viscous body is mud on which water from the paddy field is laminated.

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