JP6545941B2 - Fish signal detection device and information output device - Google Patents

Description

  The disclosure of the present specification relates to a fish detection apparatus capable of detecting a fish communication, and in particular, a fish communication detection apparatus capable of generating a fish communication signal for notifying a fisherman of a detected fish communication The present invention relates to an information output device for notifying an angler of fish communication based on a fish communication signal from a fish communication detection device.

  Devices have been proposed to notify fishers of fish signals by methods other than visualizing floats. For example, Japanese Patent Application Laid-Open No. 2009-118809 (Patent Document 1) discloses an apparatus for transmitting a detection signal of acceleration applied to a float superimposed on an FM carrier. In Japanese Utility Model Application Laid-Open No. 3-108374 (Patent Document 2), it is also proposed to notify an angler of the timing for pulling up a fishing rod from an FM antenna provided on a float. Further, in Japanese Patent Application Laid-Open No. 2003-310127 (Patent Document 3) and Japanese Patent Application Laid-Open No. 63-309125 (Patent Document 4), an apparatus for transmitting a fish signal via a wired signal line is proposed.

JP, 2009-118809, A Japanese Utility Model Application Publication No. 3-108374 Japanese Patent Application Publication No. 2003-310127 Japanese Patent Application Laid-Open No. 63-309125

  In the case of transmitting a signal (fish signal) indicating that a fish has caught a hook by using a wired signal line, the signal line interferes with fishing. That is, in the patent document 3 mentioned above, since a fishing line and a signal line are twisted together, when a fish pulls a fishing hook, a larger resistance will be felt rather than the case of only a fishing line, and it will become easy to discharge a trick. In Patent Document 4, an optical fiber is used as a fishing line. Since the optical fiber is less flexible than a general fishing line, even in the device of Patent Document 4, when the fish pulls on a fishing hook, it feels more resistant than the normal fishing line. In addition, since the optical fiber has a diameter larger than that of a general fishing line, it is easy to be found by fish and it becomes difficult for the fish to catch on the hook.

  It may be considered that wireless transmission of the fish signal will solve the above problems. However, as described in Patent Document 1 and Patent Document 2, when transmitting a fish signal using an FM carrier, it is necessary to put an FM antenna on the water so that the FM carrier does not attenuate in water. is there. Therefore, this fish detection device can not be provided in parts other than the float. Further, even when the FM antenna is put on the water, the FM carrier wave is attenuated when passing through the water surface, and there is a problem that the fish signal can not be transmitted efficiently. Furthermore, since the float sinks into the water at the timing when the fish hooks on the hook and transmission of the fish signal is most necessary, the deterioration in transmission quality of the fish signal becomes the largest at the timing when the fish hooks on the hook I will.

  Therefore, the disclosure of the present specification aims at providing a fish signal detection device capable of suppressing deterioration of transmission quality when transmitting a fish signal detected without using a wired signal line. Do. Other purposes will become apparent throughout the present specification.

  A fish signal detecting device according to an embodiment of the present invention includes a case, a sensor provided in the case, and a sensor for outputting an electrical signal, and a fish signal indicating that a fish hooked on a hook based on the electrical signal. A signal processing unit that generates a signal, and a transmission unit that transmits an ultrasonic wave modulated by the fish signal.

  According to this embodiment, the fish signal is transmitted using an ultrasonic wave with a small attenuation rate in water, so even without using a wired signal line, transmission of the fish signal is more than when using an electromagnetic wave as a carrier wave. It is possible to suppress the deterioration of quality.

  The fish detection apparatus according to one embodiment of the present invention is configured such that its specific gravity is substantially equal to water (fresh water or seawater depending on the environment of use). According to this embodiment, it is possible to prevent the fish from feeling unnatural resistance when the fish pulls on the hook.

  The sensor of the present invention is configured to be able to detect that a fish has caught a hook (or the presence of a fish in the vicinity of a hook) by various methods and output an electrical signal according to the detection result Be done. For example, a sensor according to an embodiment of the present invention includes a light projecting unit that emits detection light, and a light receiving unit that receives reflected light that has returned from the direction of a fishing hook. This makes it possible to detect the presence of fish in the vicinity of the hook.

  A sensor according to another embodiment of the present invention includes an arm that is displaced in response to a fish hooked on a fishing hook, and a displacement detection unit that detects the displacement of the arm. The sensor according to still another embodiment of the present invention may be a strain sensor that detects a strain generated in response to a fish hooked on a hook. A sensor according to still another embodiment of the present invention includes a transmission unit that emits ultrasonic waves, and a reception unit that receives a reflected wave that has returned from the direction of a fishing hook. The sensor according to still another embodiment of the present invention may be an acceleration sensor that detects an acceleration applied to the housing. Also in these embodiments, the hooking of the fish (or the presence of the fish in the vicinity of the hook) can be detected by various methods.

  An information output apparatus according to an embodiment of the present invention includes: a receiving unit that receives a fish communication signal transmitted from a fish communication detection apparatus configured as described above; and an output that outputs information based on the fish communication signal And a unit.

  According to the embodiment, the fisherman can grasp that the fish hooked on the hook or the presence of the fish in the vicinity of the hook according to the information output from the output unit.

  As described above, according to various embodiments of the present invention, a fish signal detection apparatus capable of suppressing deterioration in transmission quality when transmitting a fish signal detected without using a wired signal line is disclosed. Can be provided.

FIG. 1 schematically shows a fish detection system according to an embodiment of the present invention FIG. 1 schematically shows a fish signal detection apparatus according to an embodiment of the present invention. A schematic view of a fish signal detection apparatus according to another embodiment of the present invention A schematic view of a fish signal detection apparatus according to another embodiment of the present invention A schematic view of a fish signal detection apparatus according to another embodiment of the present invention A schematic view of a fish signal detection apparatus according to another embodiment of the present invention

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, the same referential mark is attached | subjected to the common component in drawing.

  First, with reference to FIG. 1, an outline of a fish detection system according to an embodiment of the present invention will be described. As illustrated, a fish detection system according to an embodiment of the present invention includes a fish detection apparatus 100 for transmitting a fish communication signal indicating that a fish has caught on a hook or the like, and the fish communication detection apparatus 100. And an information output device 120 for outputting information (sometimes referred to as "fish notification information" in the present specification) indicating that a fish is caught in a trap based on a fish communication signal from The fish signal detection device 100 is put into water and used. The information output device 120 is installed, for example, on a boat on which an angler is aboard. An information output apparatus 120 according to an embodiment of the present invention includes a receiver 121, a demodulator 122, and an output unit 123. Details of the information output device 120 will be described later.

  Next, with reference to FIG. 2, a communication detection apparatus 100 according to an embodiment of the present invention will be described. The fish detection apparatus 100 shown in FIG. 2 includes, for example, a housing 101 formed in a hollow box shape, a fish detection unit 102, a signal processing unit 103, a transmission unit 104, and a power supply 106. . The communication detection unit 102, the signal processing unit 103, the transmission unit 104, and the power supply 106 are accommodated in the housing 101. The housing 101 is waterproofed to prevent leakage of the members contained in the housing 101.

  The housing 101 is formed of a synthetic resin such as polyethylene. One end of a line 107 extending from the fishing rod R is attached to an upper portion of the housing 101. Also, a Harris 109 is attached to the lower part of the housing 101, and a fishing hook 108 is attached to the tip of the Harris 109.

  As the fish detection unit 102, an optical sensor capable of emitting detection light, receiving reflected light of the detection light, and outputting an electrical signal according to the light amount of the reflected light can be used. The signal processing unit 103 generates a fish signal indicating that a fish hooks on a hook (or that a fish is present in the vicinity of a fish hook) based on the electrical signal output from the fish detection unit 102, and a transmitter The signal 104 is transmitted to the information output device 120. The power supply 106 supplies necessary power to the communication detection unit 102, the signal processing unit 103, the transmission unit 104, and other electronic components. The power source 106 may be, for example, a small button battery, environmental temperature difference, vibration, an energy harvesting battery that converts light energy into electric power, or any other battery.

  In one embodiment, the fish detection unit 102 includes a light projecting unit 1021 that emits detection light, and a light receiving unit 1022 that receives reflected light generated by reflection of the detection light. The light emitting unit 1021 and the light receiving unit 1022 are accommodated, for example, below the housing 101. At least a part of the housing 101 is formed to be transparent or translucent so as to transmit the detection light emitted from the light emitting unit 1021 and the reflected light toward the light receiving unit 1022. The light projecting unit 1021 is, for example, a light emitting diode (LED), and can emit light in a predetermined band. The arrangement and orientation of the light projection unit 1021 are adjusted such that detection light is emitted at least around the hook 108. The light projecting unit 1021 is configured to emit, for example, light of a wavelength having a fish collecting effect. The light emitted from the light projecting unit 1021 may be, for example, visible light, infrared light, or light of a frequency band near another visible light band.

  The light receiving unit 1022 includes a photoelectric conversion element such as a photodiode. This photoelectric conversion element is, for example, a known cadmium sulfide cell. The photoelectric conversion element of the light receiving unit 1022 can generate an amount of charge corresponding to the amount of light received, read out an electric signal (for example, a voltage value) corresponding to the amount of generated charge, and output it as an output signal. For example, the value of this electrical signal is proportional to the amount of received light. In order to allow the light receiving unit 1022 to receive light of a sufficient light quantity, the light projecting unit 1021 may be provided with a condensing lens. In addition, in order to prevent environmental light from the periphery of the fish detection apparatus 100 from entering the light receiving unit 1022 and generating noise, light shielding is performed to block the light from being incident on the light receiving unit 1022 from directions other than reflected light of detection light. Even if a member is attached to the housing 101, or part of the housing 101 is formed of synthetic resin that does not transmit light so as to block the incidence of light on the light receiving unit 1022 from directions other than the reflected light of the detection light. Good.

  As described above, the detection light from the light emitting unit 1021 is irradiated around the fishing hook 108, the light receiving unit 1022 receives the reflected light of the detection light, and an electrical signal according to the light amount of the reflected light is output. Therefore, when the fish 105 hangs on the fishing hook 108 or exists near the fishing hook 108, the light amount of the reflected light increases, and the value (voltage value) of the electrical signal output from the light receiving unit 1022 increases.

  The signal processing unit 103 generates, based on the output signal from the fish detection unit 102, a fish communication signal indicating that a fish has hooked on a hook or that a fish is present in the vicinity of the hook. In one embodiment, the signal processing unit 103 generates a fish signal when the value of the electrical signal output from the fish detection unit 102 is larger than a predetermined threshold.

  Then, the signal processing unit 103 modulates the carrier wave with the fish signal to generate a modulation wave, and transmits the modulation wave from the transmission unit 104 into water. Modulation of the fish signal may be performed using various analog or digital modulation. When analog modulation is used, the fish signal is D / A converted before modulation. Various known modulation schemes can be used to modulate the fish signal. For example, amplitude modulation, frequency modulation, phase modulation, and various other modulation schemes can be used. For example, in the case of using frequency modulation, when the fish 105 hangs on the hook 108, the carrier signal is modulated to the frequency f1 by the fish signal.

  In one embodiment of the present invention, ultrasound is used as a carrier to transmit a fish signal. Since ultrasonic waves have a lower attenuation rate in water than electromagnetic waves (see, for example, “The Basics and Applications of Marine Acoustics” edited by The Japan Institute of Marine Acoustics, Nariyamado Bookstore.) It is possible to suppress the deterioration of transmission quality when transmitting a signal to the information output device 120.

  The transmitting unit 104 is configured to transmit the fish signal modulated by the signal processing unit 103. For example, the transmission unit 104 includes a piezoelectric element, generates an acoustic signal by vibrating the piezoelectric element based on the fish signal from the signal processing unit 103, and transmits (transmits) the acoustic signal into water. In this manner, the transmission unit 104 transmits an ultrasonic wave modulated by the fish signal.

  The acoustic signal transmitted from the transmission unit 104 is received by the reception unit 121 of the information output device 120. In one embodiment, the receiving unit 121 may be a hydrophone that receives (receives) ultrasonic waves and converts the received ultrasonic waves into electrical signals.

  The demodulation unit 122 amplifies the reception signal output from the reception unit 121 as necessary, and performs demodulation processing according to the modulation processing in the signal processing unit 103 to obtain a fish signal. For example, when a signal of frequency f1 is detected by the demodulation unit 122, it can be determined that a fish is hooked on the hook or that a fish is present in the vicinity of the hook. The demodulation unit 122 outputs the demodulated signal to the output unit 123.

  Based on the demodulated fish signal from the demodulator 122, the output unit 123 transmits fish signal information indicating that a fish is hanging on the hook or that there is fish in the vicinity of the hook to the fisherman Configured The output unit 123 according to an embodiment of the present invention includes, for example, a monitor that generates a display screen generated based on an output signal from the demodulation unit 122. This monitor is an arbitrary monitor such as a liquid crystal monitor. On this monitor, for example, based on the fish signal demodulated by the demodulation unit 122, a display screen including an indication (for example, the characters "fish is hanging") indicating that the fish is hanging is the monitor concerned Is displayed on. In addition, the output unit 123 according to another embodiment of the present invention can transmit fish signal information to an angler by the color of the warning light and the light emission pattern. The warning light includes, for example, an LED, and can notify fishermen of fish communication information by lighting the LED when a fish is hanging. In addition, the output unit 123 according to another embodiment of the present invention can transmit the fact that a fish is hooked to the angler by an acoustic signal (for example, a buzzer).

  In the case of using the fish detection system described above, the fisherman first attaches the fish detection apparatus 100 to the fishing line together with other devices, throws it into the water, and waits for the fish to catch in the same manner as normal fishing. When a fish hooks on the hook 108, the fish detection device 100 generates a fish detection signal indicating that the fish is caught or that the fish is present in the vicinity of the fishing line, and modulates the ultrasonic carrier wave with the fish detection signal. , Transmit this modulated carrier. The information output device 120 receives the transmission signal of the fish detection apparatus 100, and demodulates and decodes the received signal to obtain a fish transmission signal. Then, based on the fish signal, the output unit 123 performs a predetermined display or generates a predetermined acoustic signal, so that the fish is caught or the fish is present in the vicinity of the fishing line. Can be notified.

  As described above, according to the embodiment of the present invention, the angler can grasp that a fish is caught based on the fish signal from the fish detection device 100. The fish signal is transmitted using ultrasonic waves with a low attenuation rate in water as a carrier wave, so the fish signal detection device 100 in water transmits the fish signal to the information output device 120 in water. At the same time, deterioration of transmission quality can be suppressed.

  In one embodiment of the present invention, the fish detection apparatus 100 is such that its specific gravity is equal to or substantially equal to the environment (fresh water or seawater of various concentrations) into which the fish detection apparatus 100 is inserted. Configured as. As an example, when fish detection apparatus 100 is introduced into fresh water, the specific gravity of fresh water is about 1.0, so the specific gravity of fish detection apparatus 100 is about 1.0, for example, about 0.8. Configured to be about 1.2, about 0.9 to about 1.1, about 0.95 to about 1.05, or about 0.995 to about 1.005. When the fish detection apparatus 100 is introduced into seawater, the specific gravity of the fish detection apparatus 100 is configured to be equal to or substantially equal to the specific gravity of the seawater. For example, when the fish detection apparatus 100 is introduced into seawater having a specific gravity of 1.03, the specific gravity of the fish detection apparatus 100 is about 1.03, for example, about 0.83 to about 1.23, about 0. .93 to about 1.13, about 0.98 to about 1.08, or about 1.025 to about 1.035.

  The specific gravity of the fish detection apparatus 100 can be adjusted in various ways. For example, the specific gravity of the fish detection apparatus 100 can be adjusted by changing the material of the housing 101 or adjusting the amount of air confined in the housing 101 to adjust the buoyancy obtained from the air. As described above, the fish detection apparatus 100 includes the fish detection unit 102, the signal processing unit 103, the transmission unit 104, and the power supply 106, and each of these components usually has a specific gravity larger than that of fresh water or seawater. It is considered to have. Therefore, the housing 101 is formed of a synthetic resin having a specific gravity smaller than that of fresh water or seawater, or the specific gravity of the fish detection apparatus 100 is determined by trapping a predetermined amount of air in the housing 101. It can be substantially equal to seawater. Further, in order to increase the specific gravity of the fish detection apparatus 100, a weight may be attached to the housing 101, or the housing 101 may be formed of a material having a specific gravity larger than that of fresh water or seawater.

  As described above, by setting the specific gravity of the fish detection device 100 to be substantially equal to the water (fresh water or seawater) of the usage environment, the fish unnaturally resists the fish when the hook 108 is pulled. You can try not to make them feel.

  Next, with reference to FIG. 3, a fish signal detection apparatus according to another embodiment of the present invention will be described. FIG. 3 is a schematic view of a communication detection apparatus 200 according to another embodiment of the present invention. The fish signal detection apparatus 200 shown in FIG. 3 is different from the fish signal detection apparatus 100 in a specific method of detecting a fish signal.

  As shown in FIG. 3, the communication detection apparatus 200 according to an embodiment of the present invention includes a position detection sensor 2021, an arm 2022, and a permanent magnet 2023. The arm 2022 is a plate-like or rod-like member made of, for example, a synthetic resin, and is pivotally supported by a housing 101 (or a member fixed to the housing 101) about an axis 2024. The permanent magnet 2023 is attached to the proximal end side of the arm 2022. The permanent magnet 2023 rotates around the shaft 2025 with the arm 2022. A Harris 109 is attached to the tip of the arm 2022, and a hook 108 is attached to the tip of the Harris 109.

  The position detection sensor 2021 is disposed in the housing 101 near the permanent magnet 2023. The position detection sensor 2021 includes a magnetic proximity sensor, for example, a magnetic sensor such as a Hall element. The position detection sensor 2021 can detect a change in the magnetic field of the permanent magnet 2023 and can output an electrical signal corresponding to the amount of change in the magnetic field to the signal processing unit 103. When the electric signal (for example, voltage value) from the position detection sensor 2021 reaches a predetermined value or more, the signal processing unit 103 can determine that a fish is hooked on the hook 108, and can generate a fish signal. The position detection sensor 2021 in the present embodiment is realized using various known position detection sensors or proximity sensors in addition to the magnetic proximity sensor. For example, the position detection sensor 2021 is an electrical resistance type sensor that detects a change in electrical resistance with the arm 2022, a capacitance type sensor that detects a change in electrostatic capacitance with the arm 2022, an optical sensor, It may be a high frequency oscillation type proximity sensor or any other known position detection sensor.

  Thus, in the embodiment shown in FIG. 3, the hook 108 is connected to the arm 1022 via the Harris 109. The arm 1022 is in a neutral position (in FIG. 3, a position in which the proximal end of the arm 2022 extends substantially horizontally) by the elastic force of the arm 1022 when the fish is not hooked on the hook 108. When the fish 105 hooks on the hook 108, tension is applied to the arm 1022 from the hook 108 via the haris 109, so that the arm 1022 rotates around the shaft 2024. As a result, the permanent magnet 2023 and the position detection sensor 2021 The distance of Therefore, when the value (for example, voltage value) of the electrical signal from the position detection sensor 2021 becomes equal to or greater than a predetermined value, the signal processing unit 103 in one embodiment determines that the fish 105 is hooked on the fishing hook 108 and is thus A signal can be generated. In this manner, the fish detection device 200 shown in FIG. 3 can detect that a fish is caught on the fishing hook 108 using the electrical signal output from the position detection sensor 2021. As described above, the signal processing unit 103 modulates the ultrasonic carrier wave with the fish signal, and transmits the modulated carrier wave to the information output device 120. The information output device 120 can notify the angler that the fish hooks on the hook based on the received fish signal.

  Next, with reference to FIG. 4, a communication system according to another embodiment of the present invention will be described. FIG. 4 is a schematic view of a communication detection apparatus 300 according to still another embodiment of the present invention. The fish signal detection device 300 is different from the fish signal detection device 100 in a specific method of detecting a fish signal.

  As shown in FIG. 4, in the fish detection apparatus 300, a strain sensor 3021 is attached to the proximal end of the arm 2022. The strain sensor 3021 is provided so that strain occurs in the strain sensor 3021 when the fish 105 hangs on the hook 108 and the fish 105 pulls on the hook 108. When strain occurs in the strain sensor 3021, an electrical signal (voltage) corresponding to the magnitude of the strain is output to the signal processing unit 103.

  The strain sensor 3021 may be attached to the hook 108 instead of the proximal end of the arm 2022. The strain sensor 3021 can be provided at any position where strain occurs when the fish 105 catches on the hook.

  The signal processing unit 103 can measure a change in voltage output from the strain sensor 3021 by using a bridge circuit such as a Wheatstone bridge circuit, for example. The signal processing unit 103 in one embodiment generates a communication signal when the change in voltage is larger than a predetermined threshold.

  In this manner, the detection unit 300 shown in FIG. 4 can detect that a fish has caught the hook 108 by using the electrical signal output from the strain sensor 3021. As described above, the signal processing unit 103 modulates the ultrasonic carrier wave with the fish signal, and transmits the modulated carrier wave to the information output device 120. The information output device 120 can notify the angler that the fish hooks on the hook based on the received fish signal.

  Next, with reference to FIG. 5, a fish signal detection apparatus according to another embodiment of the present invention will be described. FIG. 5 is a view schematically showing a communication detection apparatus 400 according to still another embodiment of the present invention. The fish signal detection device 400 differs from the fish signal detection device 100 in a specific method of detecting a fish signal.

  As shown in FIG. 5, the fish detection apparatus 400 includes an underwater microphone 4021 that emits an ultrasonic wave for detection, and a hydrophone 4022 that receives a reflected wave of the ultrasonic wave. The position and direction of the underwater microphone 4021 are adjusted so that, for example, ultrasonic waves can be emitted in the direction of the hook 108. The hydrophone 4022 can output an electrical signal to the signal processing unit 103 when receiving the reflected wave.

  The signal processing unit 103 can measure the required time from the emission of the ultrasonic wave for detection from the underwater microphone 4021 to the reception of the reflected wave based on the electric signal output from the hydrophone 4022. The signal processing unit 103 detects that the fish hooks on the hook 108 or the fish is in the vicinity of the hook 108 when the time required from the generation of the ultrasonic wave for detection to the reception of the reflected wave is within a predetermined threshold. Judging that it is present, it is configured to generate a fish signal. This threshold can be determined based on the distance to the stop and the distance from the hydrophone 4022 to the hook 108 (or based on the length of the Harris 109).

  Thus, the fish detection device 400 shown in FIG. 5 uses the ultrasonic sensor consisting of the underwater microphone 4021 and the hydrophone 4022 and the fish hooks on the hook 108 or the fish exists in the vicinity of the hook 108 Can be detected. As described above, the signal processing unit 103 modulates the ultrasonic carrier wave with the fish signal, and transmits the modulated carrier wave to the information output device 120. The information output device 120 can notify the angler that the fish hooks on the hook based on the received fish signal.

  Next, with reference to FIG. 6, a fish signal detection apparatus according to another embodiment of the present invention will be described. FIG. 6 is a schematic view of a communication detection apparatus 500 according to still another embodiment of the present invention. The fish signal detection device 500 is different from the fish signal detection device 100 in a specific method of detecting a fish signal.

  As shown in FIG. 6, the communication detection apparatus 500 includes an acceleration sensor 502. Various known acceleration sensors can be used as the acceleration sensor 502. For example, a three-axis acceleration sensor can be used. For example, the acceleration sensor 502 is provided with a movable portion, and the displacement of the movable portion and the strain of a spring connected to the movable portion can be converted into an electrical signal and output. The electrical signal from the acceleration sensor 502 is output to the signal processing unit 103. The signal processing unit 103 calculates, for example, the acceleration applied to the fish detection device 500 based on the electrical signal from the acceleration sensor 502, and the fish moves to the fishing hook 108 when the acceleration becomes equal to or higher than a predetermined threshold. Judging that it is engaged, it is configured to generate a fish signal.

  In this manner, the fish detection device 500 shown in FIG. 6 can detect that a fish has caught the fishing hook 108 using the electrical signal output from the acceleration sensor 502. As described above, the signal processing unit 103 modulates the ultrasonic carrier wave with the fish signal, and transmits the modulated carrier wave to the information output device 120. The information output device 120 can notify the angler that the fish hooks on the hook based on the received fish signal. A motion sensor other than an acceleration sensor such as an angular velocity sensor or an angular acceleration sensor may be used as the communication detection device 500. In each case, it is possible to detect that the hook has caught a fish by arranging the sensor position at an appropriate place and performing appropriate signal processing.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the material, shape, size, shape, number, arrangement, and the like of each member in the embodiment described above may be appropriately changed. For example, the specific method of detecting that a fish is engaged with a hook or that a fish is present in the vicinity of the hook is not limited to the one specified herein.

100, 200, 300, 400 Fish Signal Detection Device 101 Housing 103 Signal Processing Unit 104 Transmission Unit 120 Information Output Device 121 Reception Unit 122 Demodulation Unit 123 Output Unit 1021 Projection Unit 1022 Light Reception Unit 2021 Position Detection Sensor 3021 Strain Sensor 4021 Underwater Microphone 4022 Hydrophone 502 Acceleration sensor

Claims (3)

And
A sensor provided in the housing and outputting an electrical signal;
A signal processing unit that generates a fish signal indicating that a fish hooked on a hook in water based on the electrical signal;
A transmitter configured to transmit ultrasonic waves modulated by the fish signal from water;
Equipped with
The sensor includes a light projecting unit that emits detection light, and a light receiving unit that receives reflected light returned from the direction of a fishing hook.     The fish detection system according to claim 1, wherein the specific gravity is substantially equal to that of water. A fish signal detection device according to claim 1 or claim 2 and an information output device,
The information output device is
A receiver for receiving the ultrasonic wave transmitted from the fish signal detection device ;
An output unit that outputs information based on a fish signal obtained by demodulating and decoding a received signal output from the receiving unit;
Fish signal detection system comprising .

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