JPH02227014A - Feeding equipment for cultured fish - Google Patents

Abstract

PURPOSE:To improve feeding efficiency and rationalize feeding by efficiently feeding to cultured fish by utilizing response of fish to sound, knowing fed state of fish by detecting oscillating state of water surface with water level- sensor and controlling feeding amount. CONSTITUTION:Previously recorded feeding sound of fish is emitted in water in cistern 1 by tape recorder 4 or hydrospeaker 5, etc. On the other hand, feeding is performed at a feeding condition set according to growth of fish with a timer means 3. Further, feeding is performed to fish gathered after sound emission for a fixed time with the above-mentioned sound-emitting means from a feeding device 6. Besides, deviation of water surface in cistern by feeding of fish is detected by a water level sensor 7. Then, at least fed state of fish is judged according to fluctuation of water surface detected by the water level sensor 7 and feeding amount and feeding time from the feeding device 6 are controlled in a control means 10. As a result, improvement of feeding efficiency and rationalization of feeding to cultured fish bred in cistern are achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a feeding device for farmed fish, and particularly to a feeding device for farmed fish suitable for improving feed efficiency and optimizing feeding for farmed fish.

[Prior Art] In the past, the feeding work of feeding fish growing in water in a breeding aquarium was mostly done manually, but recently, with the spread of solid food.

Automatic feeding machines are increasingly being used to raise freshwater fish such as cod, carp, sweetfish, and tilapia, or saltwater fish such as red sea bream.

The feeding machines that are popular in Japan are of the pneumatic feeding type using a blower, and solid feed is ejected from a discharge pipe. By adjusting the tip of the discharge tube, the angle of the feed jet can be changed and the flow rate can also be adjusted. Moreover, a predetermined amount of feed can be fed at a predetermined time using a time switch.

[Problems to be Solved by the Invention] Although the use of automatic feeding as in the prior art described above has become popular, the state in which fish eat food, that is, the feeding state, changes from day to day. The daily feeding amount must be adjusted.

Therefore, the reality is that the introduction of a feeding machine cannot necessarily be said to result in labor or manpower savings.

In addition, if the fish do not eat as much food as they should and the automatic feeding by the feeder results in overfeeding, the leftover food will dissolve into the breeding water, causing deterioration of water quality and sediment, and may cause filtration in the aquarium's water circulation system. There was a problem in that it caused difficulties in maintenance and management of the device.

The present invention was made in order to solve the problems in the prior art described above, and it improves the feed efficiency and optimizes feeding for cultured fish reared in aquariums, and also overloads the filtration device in the water circulation system of the aquarium. It is an object of the present invention to provide a feeding device for farmed fish that can prevent this.

[Means for Solving the Problems] In order to achieve the above object, the structure of the feeding device for farmed fish according to the present invention is such that the feeding device for farmed fish that feeds the fish growing in water in the aquarium has a structure in which the feeding device for the farmed fish feeds the fish growing in the water in the aquarium. , a means for emitting a sound into the water in an aquarium to attract a fish feeder; a timer means for feeding the fish under feeding conditions set according to the growth of the fish; A feeding machine that feeds the fish, a water level sensor that detects vibrations of the water surface in the aquarium due to feeding by the fish, and at least the amount of food fed from the feeding machine by determining the feeding state of the fish according to the vibrations of the water surface detected by the water level sensor.

and a control means for controlling feeding time.

[Operation] The idea behind developing the above technical means and its function are as follows.

In general, when fish eat food, it depends on the type of food.
Each species is known to produce a distinctive sound. That sound is called a feeder.

It is also known that if you raise fish in an aquarium, record the feeder, and broadcast this sound into the tank using an underwater speaker, the fish will gather around the speaker and exhibit food-seeking behavior. There is.

The device of the present invention utilizes the reaction of fish to sounds to efficiently feed cultured fish in an aquarium, and detects the vibration state of the water surface with a water level sensor to ensure proper feeding. This is to know the condition and adjust the feeding amount.

[Example] An example of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a configuration diagram of a feeding device for farmed fish according to an embodiment of the present invention, and FIG. 2 is a perspective view of a float type liquid level gauge used in the device of FIG.

In FIG. 1, 1 is a breeding aquarium for fish 2 (hereinafter simply referred to as an aquarium), 3 is a timer device related to timer means,
It is a combination of a 24-hour timer and a short-time timer, and is a means for feeding the fish under feeding conditions that are set according to the growth of the fish.

4 is a tape recorder; 5 is an underwater speaker 6, which is a means for emitting sound into the water in the aquarium 1, indicating a fish feeder;
The feeding device 6 is of a pneumatic feeding type using, for example, a blower, and sprays solid feed toward the aquarium from a discharge pipe.

7 is a float type liquid level gauge related to a water level sensor that detects the fluctuation of the water surface in the aquarium 1 due to feeding by the fish 2; 8 is a protective cover provided around the float type liquid level gauge 7; 9 is a feeding device Machine 6
This is an alarm lamp related to a notification means for notifying the stop of feeding.

Reference numeral 10 denotes a control device related to control means, which includes a microprocessing unit (hereinafter referred to as MPU) 10a and a display section 1.
0b and a recording section 10c.

11 is a pipe that circulates water in the water tank 1, 12 is a circulation pump, and 13 is a filtration device.

Feeding control by such a feeding device for farmed fish will be explained. Various feeding control operations are automatically performed based on commands from the control device 10.

Feeding is done several times a day by setting up a feeding area.

The amount of feeding is determined based on the feeding rate table based on the water temperature and growth of the fish. Feeding time, feeding time, feeding amount,
It is set by a timer device 3 consisting of a 24-hour timer and a short-time timer. That is, feeding conditions are set by the timer device 3 according to the growth of the fish.

First, the feeding sound of the fish 2 is recorded in advance on a tape recorder 4, and this feeding sound is emitted into the water in the aquarium 1 for a certain period of time using an underwater speaker 5 before feeding to collect fish.

Next, the feeder 6 is operated, and the solid feed is ejected from the discharge pipe 6a into the aquarium 1 to be fed to the fish 2 gathered around the underwater speaker 5.

At the same time, feeding is confirmed using the float type liquid level gauge 7.

The structure and operation of the float type liquid level gauge 7 will now be explained with reference to FIG. 2.

Regarding the float type liquid level gauge 7, please refer to "Practical Sensor Dictionary" published by Fuji Techno System, March 1, 1986.
It is described on page 1015.

The float type liquid level gauge 7 is as shown in FIG.

Float 7a, torque arm 7b, torque tube 7c
, a rotary shaft 7d, a cantilever 7e, and a strain shift f. A mesh-like protective cover 8 is provided around the flow 7a to prevent vibration caused by contact with the fish 2.

When there is a change in the water surface due to feeding by the fish 2, the buoyancy of the float 7a changes in the direction of the arrow, and the change in force is transferred to the rotary shaft 7 via the torque arm 7b and torque tube 7c.
d. The rotation of the rotary shaft 7d displaces the cantilever 70 in the direction of the arrow, and the strain caused by this displacement becomes a resistance change due to the strain shift f.

Since the strain shift f is incorporated in the bridge circuit of the control block shown as a mechanical part in FIG. 2, the resistance change described above is converted into an unbalanced voltage of the bridge.
It is amplified by an amplifier and finally converted into a current and becomes an output. That is, the detection result of the float type liquid level gauge 7 is displayed on the display section 10b as a state of water surface fluctuation via the MPU10a of the control device 10, and is outputted as detection data from the recording section 10c as necessary.

After the start of feeding, if the water surface oscillates, it is determined that feeding is good, if the oscillation is small, it is determined that feeding is poor, and if there is no vibration, it is determined that there is no feeding. That is, the magnitude of the amplitude of the water surface detected by the float type liquid level gauge 7 is converted into a current, and compared with the current value preset and stored in the MPU 10a of the control device 10, it is determined whether the feeding is good or not. Determined as defective or non-existent.

In the case of poor feeding, the feeding machine 6 is stopped after a certain period of time has elapsed. Further, if no food is being fed, the feeding machine 6 is immediately stopped.

When the feeding machine 6 stops, an alarm lamp 9 notifies the feeding machine of the stoppage.

According to this embodiment, it is possible to improve the feeding efficiency for the fish 2 in the aquarium 1, optimize the feeding, and prevent wasteful feeding from dissolving leftover food into the rearing water and deteriorating the water quality and bottom sediment. .

In FIG. 1, leftover bait and excrement of the fish 2 are shown, and the water in which this has dissolved is the pipe 11. The water is circulated through the circulation pump 12, filtered and cleaned by the filtration device 13, and returned to the water tank 1. If there is a lot of leftover bait and the water quality is poor, the filter device 13 will be overloaded and the filter media will have to be maintained frequently. According to this embodiment, there is little dissolution of leftover bait and the water quality does not deteriorate, so overloading of the filtration device can be prevented.

The above-mentioned feeding device detects vibrations on the water surface caused by fish eating food, so it is best to apply it in an indoor environment where there is no influence from wind and rain. It can also be applied outdoors as long as the water surface is stable.

[Effects of the Invention] As described above, according to the present invention, it is possible to improve feed efficiency and optimize feeding for cultured fish reared in an aquarium, and to prevent overloading of the filtration device in the water circulation system of the aquarium. It is possible to provide a feeding device for farmed fish that can feed fish.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a feeding device for farmed fish according to an embodiment of the present invention, and FIG. 2 is a perspective view of a float type liquid level gauge used in the device of FIG. 1. l...Aquarium, 3...Timer device, 4...Tape recorder, 5...Underwater speaker, 6...Feeder,
7... Float type liquid level gauge, 8... Protective cover, 9...
- Alarm lamp, 10...control device.

Claims (1)

[Scope of Claims] 1. A feeding device for farmed fish that feeds fish growing in water in an aquarium, comprising means for emitting prerecorded feeding sounds of fish into the water in the aquarium, and setting according to the growth of the fish. a timer means for feeding the fish under certain feeding conditions; a feeding machine that feeds the collected fish after emitting sound for a certain period of time by the sound emitting means; and a water level sensor that detects fluctuations of the water surface in the aquarium due to feeding by the fish. A feeding device for farmed fish, comprising at least a control means for determining the feeding state of the fish according to vibrations of the water surface detected by the water level sensor and controlling the feeding amount and feeding time from the feeding machine. 2. The feeding device for farmed fish according to claim 1, wherein the water level sensor provided in the aquarium is provided with a protective cover around it. 3. A feeding device for farmed fish according to claim 1, characterized in that the feeding machine is provided with a leaving means for notifying the stop of feeding.