Live fish photographing device convenient for displaying fish morphological characteristics

Abstract

The invention discloses a live fish photographing device convenient for displaying fish morphological characteristics, the live fish photographing device comprises a photographing box and a pulse generator, the pulse generator is connected with an anode strip and a cathode strip, the anode strip and the cathode strip are arranged in the photographing box and are oppositely arranged, and a live fish to be photographed is placed between the anode strip and the cathode strip. The photographing box comprises a bottom plate, a background plate, a left side plate and a right side plate which are vertically arranged on the bottom plate, and a transparent observation photographing plate which is obliquely arranged on the bottom plate at a certain angle. The photographing box is connected with a circulating water pipe, and a water outlet of the circulating water pipe is located at the position of the anode plate, so that water flows from the anode plate to the cathode plate; and a circulating water pump and a filter are arranged on the circulating water pipe. Under the dual action of pulse stimulation and water flow, the fish can be kept in a posture of swimming towards the anode strip, and the fins can be fully unfolded, so that the morphological characteristics of the fish can be conveniently shot out. The device can be widely applied to the fish sample collection field.

Description

Technical Field

[0001] The invention relates to the technical field of live fish photography, and in particular to a live fish photography device which is convenient for displaying the morphological characteristics of fish. Background Art

[0002] In the study of fish species, it is necessary to take photos of fish and keep them in the form of images for subsequent researchers to consult. In order to capture the details of the fish's fins, it is clearest to take photos when the fins are spread out. To achieve the above purpose, at present, the method of taking photos of dead fish is mainly used. Dead fish are convenient for adjustment and taking photos, but this method is irreversible. For rare species, this type of collection and photography method may have a certain impact on the ecology. In order not to cause irreversible damage to the fish and to allow the fish to be released into the wild after being photographed, some researchers also use live fish for photography. The common method is to put the fish in a transparent photography box and take photos when the fish swims normally. It is necessary to take photos from multiple angles and for a long time to screen out clear images of fish with fully spread fins. This work is not only time-consuming, but also has uncertain effects, and cannot meet the needs of photographing and sampling. Therefore, it is necessary to develop a device that can quickly and accurately obtain clear images and video of fish with their fins spread out, so as to facilitate taking photos and retaining image data (hereinafter referred to as taking photos). Summary of the invention

[0003] The purpose of the present invention is to provide a live fish photographing device that is convenient for displaying the morphological characteristics of fish, so as to solve the problem that the existing live fish photographing device cannot accurately and quickly obtain clear images of fish in the state of unfolded fins.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a live fish photographing device that is convenient for displaying the morphological characteristics of fish, including a photographing box and a pulse generator, wherein the pulse generator is connected to an anode plate and a cathode plate, the anode plate and the cathode plate are placed in the photographing box and arranged opposite to each other, and the live fish to be photographed is placed between the anode plate and the cathode plate.

[0005] Specifically, the output voltage V of the pulse generator is (f) The calculation formula is: V (f) =V T *S, V T is the reference voltage (v / cm), S is the electrode spacing (cm); the calculation formula of the reference voltage (v / cm) is: The calculation formula of the reference voltage (v / cm) is: V T=b*(-t)+k, where: t is water temperature (℃), and 1≤t≤30; for scaleless fish: b value is 1 / 290, k value is 147 / 580, for scaly spindle-shaped fish: b value is 3 / 580, k value is 42 / 83, for scaly side-flattened fish: b value is 1 / 290, k value is 71 / 200.

[0006] Preferably, the pulse generator adopts an AC power supply, and the pulse signal emitted is in the shape of a sharp pulse.

[0007] Furthermore, the pulse waveform function: y=x -a , wherein: 0.5<a<3; the pulse signal output frequency emitted by the pulse generator is 0.05-10Hz, and the pulse width is 1.5-50ms.

[0008] In order to keep the water clean and guide the fish to flow towards the anode plate, the photo box is also provided with a circulating water pipe, the outlet of which is located at the anode plate, so that the water flows from the anode plate to the cathode plate; the circulating water pipe is provided with a circulating water pump and a filter.

[0009] In order to obtain clear images, the photo box includes a bottom plate, a background plate, a left plate and a right plate vertically arranged on the bottom plate, and a transparent observation photo plate tilted at a certain angle on the bottom plate; the bottom plate, the background plate, the left plate, the right plate and the transparent observation photo plate together form a chamber with an opening on the top; the bottom of the transparent observation photo plate is short from the background plate, and the top is long from the background plate; the anode plate and the cathode plate are respectively arranged close to the left plate and the right plate.

[0010] In order to prevent the fish from turning and turning around when taking pictures, which would affect the effect of taking pictures, a transparent movable plate parallel to the background plate is also arranged in the chamber.

[0011] In order to form a sharp contrast with the fish being photographed, the background board is black, white or other light colors.

[0012] To avoid reflection when taking pictures, the angle between the transparent observation and photography board and the bottom plate is 70-80°.

[0013] In order to further improve the clarity of the photos, a fill light for taking photos is also arranged above the chamber.

[0014] Beneficial effects of the present invention: The present invention stimulates fish by using a pulse signal emitted by a pulse generator, so that the fish spreads its fins after receiving the pulse stimulation, and then takes pictures, thereby quickly obtaining images with the fins spread, facilitating sample collection and not causing damage to the fish. At the same time, combined with the direction of water flow and the position of the anode sheet, under the habit of fish's positive reaction and countercurrent swimming, the fish can always maintain a posture of swimming toward the anode sheet, which is convenient for taking pictures. The use of sharp pulses can further reduce the damage to the fish while stimulating the fish. The pulse voltage calculated by the present invention can ensure the opening of the fins without causing too much damage to the fish. Therefore, after the photography is completed, the fish can be released back to nature, thereby ensuring that the ecology will not be destroyed. The photography box adopts a transparent observation and photography board arranged obliquely to avoid reflection affecting the photography effect during photography. The background board can change color according to different fish, thereby obtaining a clear image with contrast. The transparent movable board is used to limit the movement of the fish, preventing the fish from swimming quickly and flipping during photography, which affects the normal photography. Therefore, through this device, the image of the fish can be obtained quickly, accurately and clearly.

[0015] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the photo box of the present invention.

[0017] Figure 2 It is a lateral cross-sectional view of the photo box of the present invention.

[0018] Figure 3 It is a top view of the photo box of the present invention.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping block in the present invention.

[0020] Figure 5 It is the front view of the present invention.

[0021] Figure 6 Schematic diagram of the structure of the sharp pulse. DETAILED DESCRIPTION

[0022] Examples, such as Figures 1 to 6 As shown, a live fish photographing device convenient for displaying the morphological characteristics of fish comprises a photographing box 1 and a pulse generator 2, wherein the pulse generator 2 is connected with an anode plate 3 and a cathode plate 4, the anode plate 3 and the cathode plate 4 are placed in the photographing box 1 and arranged opposite to each other, the live fish to be photographed is placed between the anode plate 3 and the cathode plate 4, the pulse signal generated by the pulse generator 2 stimulates the fish to unfold its fins, thereby facilitating the photographing of the fish's morphology and the detailed characteristics of the fins.

[0023] In order to facilitate taking photos and obtain clear side images, the photo box 1 includes a bottom plate 101, a background plate 102, a left plate 103 and a right plate 104 vertically arranged on the bottom plate 101, and a transparent observation and photography board 105 tilted at a certain angle on the bottom plate 101. The bottom plate 101, the background plate 102, the left plate 103, the right plate 104 and the transparent observation and photography board 105 are enclosed to form a chamber 106 with an upper opening. The bottom of the transparent observation and photography board 105 is short from the background plate 102, and the top is long from the background plate 102; the transparent observation and photography board 105 is tilted, so that the problem of glass reflection can be effectively avoided when taking photos. The angle α between the transparent observation and photography board 105 and the bottom plate 101 is preferably 70 to 80°. The anode plate 3 is arranged close to the left plate 103, the cathode plate 4 is arranged close to the right plate 104, and the anode plate 3 is arranged 3-5 cm apart from the left plate 103 to prevent the fish from swimming towards the anode and hitting the head on the left plate 103 when taking pictures, thereby affecting the effect of taking pictures. Preferably, the bottom plate 101, the left plate 103, the right plate 104 and the transparent observation and photography plate 105 are all made of transparent glass plates.

[0024] In order to provide a bright background color when taking pictures, the color of the background board 102 can be black, white or other light colors, and different background colors can be selected according to different fish. In order to facilitate the replacement of different colors, a color plate 108 is provided in front of the background board 102, and the color plate 108 can be fixed on the background board 102 with a clip, which is convenient for replacement and adjustment.

[0025] In order to limit the movement of fish when taking pictures, a transparent movable plate 107 parallel to the background plate 102 is also provided in the chamber 106. The transparent movable plate 107 is movably installed in the chamber 106, and the distance between the transparent observation and photographing plate 105 can be adjusted according to the size of the fish. The color plate 108 can also be fixed on the transparent movable plate 107. Then the fish is placed in the area between the transparent movable plate 107 and the transparent observation and photographing plate 105 and filled with water for photographing. To facilitate the installation of the transparent movable plate 107, a clamping strip 9 is provided on each side of the bottom of the chamber 106. The clamping strip 9 is provided with a row of clamping teeth 91. The width of the clamping teeth 91 is adapted to the thickness of the transparent movable plate 107. The upper two ends of the transparent movable plate 107 are clamped and fixed to the left plate 103 and the right plate 104 by clamping blocks 10. The structure of the clamping block 10 is as shown in FIG. Figure 4 As shown, a T-shaped slot 1001 is provided on the clamping block 10 , and the connection between the transparent movable plate 107 and the left plate 103 or the right plate 104 is realized through the T-shaped slot 1001 .

[0026] In order to facilitate supplementary lighting when taking photos, a supplementary light 11 for supplementary lighting for taking photos is also arranged above the chamber 106. The supplementary light 11 preferably adopts a strip-shaped light strip structure and uses white light for irradiation. The supplementary light 11 can be a normal lighting lamp that is always on, or a flash lamp that is connected to the shutter of the camera through a wire and lights up instantly when the shutter is pressed. Through the improvement of the box structure, taking photos is convenient and the clarity is good.

[0027] In order to stimulate fishes when taking photos, the present invention stimulates fishes by pulse signals generated by the pulse generator 2, so that the fishes spread their fins after being stimulated. The pulse signals output by the pulse generator 2 preferably use sharp pulses, and the pulse power supply uses a DC power supply. The sharp pulses can produce intermittent pulse stimulation to the fishes, which causes less damage to the fishes than continuous pulse signals. Through experimental comparison, the pulse waveform function preferably used is: y=x -a , where: 0.5<a<3, the pulse waveform is as follows Figure 6 As shown. The instantaneous stimulation of the pulse waveform to the fish gradually weakens from large to small, and the stimulation has a certain continuity, which can stimulate the fish well while minimizing the damage to the fish. Through experiments, the pulse signal output frequency emitted by the pulse generator 2 is preferably 0.05-10Hz, and the pulse width is 1.5-50ms.

[0028] The output voltage V of the pulse power amplifier 8 (f) The calculation formula is: V (f) =V T *S, V T is the reference voltage (v / cm), S is the electrode spacing (cm), and the calculation formula of the reference voltage (v / cm) is: V T =b*(t)+k, where: t is water temperature (°C), and 1≤t≤30.

[0029] The above parameters can be fine-tuned according to the species of fish. They can be roughly divided into three categories: scaleless fish, scaly spindle-shaped fish, and scaly flat-shaped fish. Among them: for scaleless fish: 1.5<a<3, pulse width: 1.5-10ms, output frequency: 0.05~5Hz, the b value in the specific calculation formula of the output voltage is 1 / 290, and the k value is 147 / 580. For scaly spindle-shaped fish: pulse width: 25-50ms, output frequency: 5~10Hz, the b value in the specific calculation formula of the output voltage is 3 / 580, and the k value is 42 / 83. For scaly flat-shaped fish: pulse width: 10-25ms, output frequency: 3~5Hz, the b value in the specific calculation formula of the output voltage is 1 / 290, and the k value is 71 / 200.

[0030] When taking pictures, since fish have a positive reaction in the electric field, they will swim towards the direction of the anode plate 3. Therefore, the fish's head is placed toward the anode plate 3 for taking pictures.

[0031] In order to further unfold the fins of the fish and keep the water in the photo box 1 clean to avoid frequent replacement of the water in the photo box 1, the photo box 1 is connected with a circulating water pipe 5, the outlet 51 of the circulating water pipe 5 is located at the position of the anode plate 3, and the return water port 52 can be set at the bottom of the photo box 1 below the cathode plate 4, so that the water flows from the anode plate 3 to the cathode plate 4 to form a water flow. Since fish generally have the habit of swimming upstream, the fish will further maintain the posture of swimming toward the anode plate 3, and the water flow is conducive to the unfolding of the fins. The circulating water pipe 5 is provided with a circulating water pump 6 and a filter 7, and the pollutants generated by the fish are filtered out by the filter 7 to keep the water clear.

[0032] Under the dual effects of pulse stimulation and water flow, the present invention can make the fish maintain the posture of swimming toward the anode plate 3 and fully spread the fins, so as to facilitate the photographing of the morphological characteristics of the fish. Moreover, this method will not cause damage to the fish, which is conducive to the protection of fish resources.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A live fish photography device for conveniently displaying the morphological characteristics of fish, comprising a photography box (1), Features: The invention also comprises a pulse generator (2), wherein the pulse generator (2) is connected to an anode plate (3) and a cathode plate (4), the anode plate (3) and the cathode plate (4) are placed in a photographing box (1) and arranged opposite to each other, and the live fish to be photographed is placed between the anode plate (3) and the cathode plate (4).

2. The live fish photography device for displaying the morphological characteristics of fish as claimed in claim 1, Features: The pulse generator (2) is connected to a pulse power amplifier (8) for adjusting the output voltage, and the output voltage V (f) The calculation formula is: V (f) =V T *S, V T is the reference voltage (v / cm), S is the electrode spacing (cm); the calculation formula of the reference voltage (v / cm) is: V T =b*(-t)+k, where: t is water temperature (℃), and 1≤t≤30; for scaleless fish: b value is 1 / 290, k value is 147 / 580, for scaly spindle-shaped fish: b value is 3 / 580, k value is 42 / 83, for scaly side-flattened fish: b value is 1 / 290, k value is 71 / 200.

3. The live fish photography device for displaying the morphological characteristics of fish as claimed in claim 1, Features: The pulse generator (2) adopts a direct current power supply, and the pulse signal shape emitted is a sharp pulse.

4. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 3, Features: The pulse waveform function: y=x -a , wherein: 0.5<a<3; the pulse signal output frequency emitted by the pulse generator (2) is 0.05-10Hz, and the pulse width is 1.5-50ms.

5. The live fish photography device for displaying the morphological characteristics of fish as claimed in claim 1, Features: The photographing box (1) is also connected to a circulating water pipe (5), the water outlet (51) of the circulating water pipe (5) being located at the position of the anode sheet (3) so that the water flows from the anode sheet (3) to the cathode sheet (4); the circulating water pipe (5) is provided with a circulating water pump (6) and a filter (7).

6. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 1, Features: The photographing box (1) comprises a bottom plate (101), a background plate (102), a left side plate (103) and a right side plate (104) vertically arranged on the bottom plate (101), and a transparent observation photographing plate (105) tilted at a certain angle on the bottom plate (101); the bottom plate (101), the background plate (102), the left side plate (103), the right side plate (104) and the transparent observation photographing plate (105) together form a chamber (106) with an upper opening; the bottom of the transparent observation photographing plate (105) is at a short distance from the background plate (102), and the top is at a long distance from the background plate (102); the anode plate (3) and the cathode plate (4) are respectively arranged close to the left side plate (103) and the right side plate (104).

7. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 6, Features: A transparent movable plate (107) parallel to the background plate (102) is also arranged in the chamber (106).

8. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 6, Features: The background plate (102) is in black, white or other light colors.

9. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 6, Features: The angle between the transparent observation and photography plate (105) and the bottom plate (101) is 70-80 degrees.

10. The live fish photographing device for displaying the morphological characteristics of fish as claimed in claim 6, Features: A fill light (11) for supplementary lighting for photographing is also provided above the chamber (106).

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