Fishing camera charging circuit and fishing camera device

Abstract

The utility model relates to a fishing camera charging circuit and a fishing camera device. The fishing camera charging circuit comprises a receiving module, a charging module and a protection module. The receiving module is used for inductively coupling with the alternating magnetic field and outputting direct-current voltage. The charging module is electrically connected to the output end of the receiving module, the charging module is used for converting the direct-current voltage into charging voltage, and the output end of the charging module and the energy storage device are arranged in the same charging loop. The protection module is electrically connected to the output end of the charging module and is used for identifying the potential of the energy storage device. The protection module is also used for controlling the on-off of the charging loop. Since the receiving module generates induced current through electromagnetic induction, the receiving module does not need to form direct conductive contact with an external electrical component, a charging interface for inserting a charging wire is avoided, and the problem that the charging interface is corroded or short-circuited due to contact with water drops is avoided.

Description

Technical Field

[0001] This application relates to the field of fishing camera technology, and in particular to a fishing camera charging circuit and a fishing camera device. Background Technology

[0002] To allow anglers to see underwater fish activities such as chasing and biting bait, a new type of fishing camera that visualizes the underwater environment has been developed. The camera operates underwater and transmits data of the underwater environment to a visualization device for display, allowing anglers to observe the underwater environment in real time.

[0003] To meet the power needs of fishing cameras, traditional fishing cameras are generally equipped with a charging port. When the fishing camera is not in use, the end of the charging cable is inserted into the charging port to charge the energy storage device inside the fishing camera.

[0004] Before charging, the sealed cover of the charging port needs to be removed. Since the casing of fishing cameras is often covered with water droplets, after the sealed cover is opened, the water droplets can easily come into contact with the charging port, which may cause oxidation of the metal parts of the charging port or cause a short circuit at the end of the charging cable inserted into the charging port. Utility Model Content

[0005] Based on this, the present invention provides a fishing camera charging circuit and a fishing camera device that can solve or at least alleviate the above-mentioned technical problems.

[0006] This utility model provides a charging circuit for a fishing camera, including:

[0007] The receiving module is used for inductive coupling with the alternating magnetic field and outputting a DC voltage;

[0008] A charging module is electrically connected to the output terminal of the receiving module; the charging module is used to convert the DC voltage into a charging voltage; the output terminal of the charging module is configured to be in the same charging circuit as the energy storage device; and

[0009] A protection module is electrically connected to the output terminal of the charging module and is used to identify the potential of the energy storage device; the protection module is also used to control the on / off state of the charging circuit.

[0010] In the aforementioned fishing camera charging circuit, when an external electromagnetic component generates an alternating magnetic field near the receiving module, the receiving module generates an alternating induced current under the principle of electromagnetic induction. The receiving module internally processes this induced current and outputs a DC voltage. The charging module adjusts the DC voltage to meet the charging requirements of the energy storage device, and this charging voltage is applied between the positive and negative terminals (Battery-) of the energy storage device via the charging circuit. The protection module identifies abnormalities in the energy storage device based on its potential and switches the charging circuit to an open state in case of an abnormality, preventing further deterioration. Because the receiving module generates the induced current through electromagnetic induction, it does not need to form direct conductive contact with external electrical components, avoiding the need for a charging interface for the charging cable. Therefore, the charging interface is not susceptible to corrosion or short circuits due to water contact. Furthermore, the fishing camera device can utilize a more sealed design, thus improving its waterproof performance.

[0011] In one embodiment, the receiving module includes an induction unit, a rectifier unit, and a filter voltage regulation unit connected in sequence; the induction unit is used to inductively couple with the alternating magnetic field and generate an AC voltage; the rectifier unit is used to convert the AC voltage into a pulsating voltage; the filter voltage regulation unit is used to reduce the fluctuation of the pulsating voltage and adjust the voltage amplitude of the pulsating voltage to form the DC voltage; the filter voltage regulation unit is electrically connected to the input terminal of the charging module.

[0012] In one embodiment, the sensing unit includes an inductor L1, one end of which is grounded and the other end is electrically connected to the input terminal of the rectifier unit.

[0013] In one embodiment, the rectifier unit includes a capacitor C1, a diode D1, and a diode D2. The anode of the diode D1 is electrically connected to the sensing unit and one end of the capacitor C1, respectively. The other end of the capacitor C1 is grounded. The cathode of the diode D1 is electrically connected to the input terminal of the filter voltage regulation unit and the cathode of the diode D2. The anode of the diode D2 is grounded.

[0014] In one embodiment, the filtering and voltage regulation unit includes resistors R1, R2, and R3, capacitor C2, inductor L2, diode D3, and voltage regulation chip U1. The voltage input pin of the voltage regulation chip U1 is electrically connected to the output terminal of the rectifier unit. Resistor R1 is connected between the voltage input pin and the enable pin of the voltage regulation chip U1. The cathode of diode D3 is electrically connected to the voltage output pin of the voltage regulation chip U1, and the anode of diode D3 is grounded. One end of inductor L2 is electrically connected to the voltage output pin of the voltage regulation chip U1, and the other end is used to electrically connect to the energy storage device. Resistor R2 and resistor R3 are connected in series between the other end of inductor L2 and ground. The sampling pin of the voltage regulation chip U1 is electrically connected to the node between resistor R2 and resistor R3.

[0015] In one embodiment, the charging module includes a charging adjustment unit electrically connected to the output terminal of the receiving module, a status indication unit electrically connected to the charging adjustment unit, and a current adjustment unit electrically connected to the charging adjustment unit; the charging adjustment unit is used to electrically connect to the energy storage device and to convert the DC voltage into a charging voltage; the status indication unit is used to display the operating status of the charging adjustment unit; and the current adjustment unit is used to set the output current of the charging adjustment unit to the energy storage device.

[0016] In one embodiment, the charging regulation unit includes a voltage regulating chip U2, the voltage input pin of the voltage regulating chip U2 is electrically connected to the output terminal of the receiving module, the two status output pins of the voltage regulating chip U2 are respectively electrically connected to the status indication unit, the voltage output pin of the voltage regulating chip U2 is used to electrically connect to the positive terminal of the energy storage device, and the constant current setting pin of the voltage regulating chip U2 is electrically connected to the current regulation unit.

[0017] In one embodiment, the status indication unit includes a resistor R4, a light-emitting diode D4, and a resistor R5. The output terminal of the receiving module is electrically connected to the anode of the light-emitting diode D4 via the resistor R4. The cathode of the light-emitting diode D4 is electrically connected to one control terminal of the charging adjustment unit via the resistor R5. The cathode of the light-emitting diode D4 is also electrically connected to another control terminal of the charging adjustment unit.

[0018] In one embodiment, the current regulating unit includes a resistor R6, which is electrically connected between the charging regulating unit and ground.

[0019] In one embodiment, the protection module includes a detection unit and a switching unit; the detection unit is electrically connected to the output terminal of the charging module and is used to identify the potential of the energy storage device; the switching unit is used to form the charging circuit with the charging module and the energy storage device; the switching unit has a connected state and a disconnected state; the detection unit is used to control the switching unit to switch between the connected state and the disconnected state.

[0020] In one embodiment, the detection unit includes a detection chip U3, the voltage input pin of the detection chip U3 is electrically connected to the output terminal of the charging module, and the control output pin of the detection chip U3 is electrically connected to the switching unit and is used to control the switching unit to switch between a connected state and a disconnected state.

[0021] In one embodiment, the switching unit includes a switching chip U4, one set of source pins of the switching chip U4 is used to electrically connect to the negative terminal of the energy storage device, another set of source pins of the switching chip U4 is grounded, the two drain pins of the switching chip U4 are connected together, and the gate pin of the switching chip U4 is electrically connected to the detection unit.

[0022] This utility model also provides a fishing camera device, including the fishing camera charging circuit of any of the above embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a fishing camera charging circuit according to an embodiment of this application.

[0024] Figure 2 for Figure 1 The diagram shows the structure of the receiving module in the charging circuit of the fishing camera.

[0025] Figure 3 for Figure 1 The diagram shows the structure of the charging module in the charging circuit of the fishing camera.

[0026] Figure 4 for Figure 1 The diagram shows the structure of the protection module in the charging circuit of the fishing camera.

[0027] Reference numerals: 100, Fishing camera charging circuit; 20, Receiver module; 30, Charging module; 40, Protection module; 500, Energy storage device. Detailed Implementation

[0028] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0032] This application provides a fishing camera device.

[0033] In some implementations, the fishing camera device is used to film underwater fish activity. Specifically, the fishing camera device is used to attach to a fishing line.

[0034] In some embodiments, the fishing camera device includes a housing, a lens module, and an energy storage device 500. The energy storage device 500 and the lens module are housed within the housing. The lens module is used to acquire images or videos related to fish activity. The energy storage device 500 is used to power the lens module. Specifically, the lens module includes an optical lens. The energy storage device 500 includes a lithium battery, a battery cell, a supercapacitor, a battery pack, or other chargeable and dischargeable devices or combinations thereof.

[0035] In some implementations, combined Figure 1As shown, the fishing camera device also includes a fishing camera charging circuit 100. The fishing camera charging circuit 100 is used to charge the energy storage device 500. Specifically, the fishing camera charging circuit 100 converts externally supplied electrical energy into a DC charging voltage that meets the requirements of the energy storage device 500, thereby charging the energy storage device 500.

[0036] Combination Figures 1 to 4 As shown, this application also provides a fishing camera charging circuit 100.

[0037] In some implementations, combined Figure 1 and Figure 2 As shown, the fishing camera charging circuit 100 includes a receiving module 20, a charging module 30, and a protection module 40. The receiving module 20 is used for inductive coupling with an alternating magnetic field and outputting a DC voltage. The charging module 30 is electrically connected to the output terminal V_Charge of the receiving module 20. The charging module 30 is used to convert the DC voltage into a charging voltage, and its output terminal is used to be placed in the same charging circuit as the energy storage device 500. The protection module 40 is electrically connected to the output terminal of the charging module 30 and is used to identify the potential of the energy storage device 500. The protection module 40 is also used to control the on / off state of the charging circuit.

[0038] Specifically, when an external electromagnetic component generates an alternating magnetic field near the receiving module 20, the receiving module 20 generates an alternating induced current under the principle of electromagnetic induction. The receiving module 20 internally processes the induced current and outputs a DC voltage. The charging module 30 adjusts the DC voltage to a charging voltage that meets the charging requirements of the energy storage device 500. This charging voltage is applied between the positive and negative terminals (Battery-) of the energy storage device 500 via the charging circuit. The protection module 40 identifies abnormalities in the energy storage device 500 based on its potential and switches the charging circuit to an open state in case of an abnormality, preventing further deterioration of the abnormality. Because the receiving module 20 generates an induced current through electromagnetic induction, it does not need to form direct conductive contact with external electrical components, avoiding the need for a charging interface for the charging cable. Therefore, the charging interface is not susceptible to corrosion or short circuits due to water contact. Furthermore, the fishing camera device can utilize a more sealed design, thus improving its waterproof performance.

[0039] In some implementations, combined Figure 2As shown, the receiving module 20 includes an induction unit, a rectifier unit, and a filter and voltage regulation unit connected in sequence. The induction unit is used to inductively couple with the alternating magnetic field and generate an AC voltage. The rectifier unit is used to convert the AC voltage into a pulsating voltage. The filter and voltage regulation unit is used to reduce the fluctuation of the pulsating voltage and adjust the voltage amplitude of the pulsating voltage to form a DC voltage. The filter and voltage regulation unit is electrically connected to the input terminal of the charging module 30. Specifically, after the induction unit generates an AC voltage through electromagnetic induction, the AC voltage is transmitted to the rectifier unit and the filter and voltage regulation unit, and gradually forms a DC voltage with a stable amplitude. This reduces the adjustment requirements of the charging module 30 and helps the energy storage device 500 obtain a stable charging voltage.

[0040] In some implementations, combined Figure 2 As shown, the sensing unit includes an inductor L1, one end of which is grounded and the other end is electrically connected to the input terminal of the rectifier unit. Specifically, when the fishing camera charging circuit 100 charges the energy storage device 500, the inductor L1 generates an alternating magnetic field. Under the influence of electromagnetic induction, an alternating voltage is generated across the inductor L1.

[0041] In some implementations, combined Figure 2 As shown, the rectifier unit includes capacitor C1, diode D1, and diode D2. The anode of diode D1 is electrically connected to the inductor unit and one end of capacitor C1, while the other end of capacitor C1 is grounded. The cathode of diode D1 is electrically connected to the input terminal of the filter voltage regulation unit and the cathode of diode D2, while the anode of diode D2 is grounded. Specifically, the anode of diode D1 is electrically connected to the other end of inductor L1. Diode D1 performs half-wave rectification of the AC voltage, converting the AC voltage into a pulsating voltage.

[0042] In some implementations, combined Figure 2 As shown, the filter voltage regulation unit includes resistor R1, resistor R2, capacitor C2, inductor L2, diode D3, and voltage regulation chip U1. The voltage input pin of voltage regulation chip U1 is electrically connected to the output terminal of the rectifier unit. Resistor R1 is connected between the voltage input pin and the enable pin of voltage regulation chip U1. The cathode of diode D3 is electrically connected to the voltage output pin of voltage regulation chip U1, and the anode of diode D3 is grounded. One end of inductor L2 is electrically connected to the voltage output pin of voltage regulation chip U1, and the other end is used to electrically connect to energy storage device 500. Resistors R2 and R3 are connected in series between the other end of inductor L2 and ground. The sampling pin of voltage regulation chip U1 is electrically connected to the node between resistor R2 and resistor R3.

[0043] Specifically, in combination Figure 2As shown, under the influence of resistor R1, the enable pin of voltage regulator chip U1 receives a high level, enabling U1 to enter the working state. Capacitor C2 reduces the fluctuation of pulsating voltage. After the pulsating voltage is input to voltage regulator chip U1 from the voltage input pin, U1 adjusts the amplitude and stability of the voltage, and then outputs a relatively stable DC voltage from the voltage output pin. Inductor L2 further filters out the AC component in the DC voltage. The sampling pin of voltage regulator chip U1 samples the DC voltage from the node between resistors R2 and R3. Based on the sampling voltage result, voltage regulator chip U1 internally adjusts the DC voltage output from the voltage output pin.

[0044] More specifically, combined Figure 2 As shown, the cathode of diode D1 is electrically connected to the voltage input pin of voltage regulator chip U1. The other end of inductor L2 is used to electrically connect to the positive terminal of energy storage device 500. In one embodiment, combined with Figure 2 As shown, the other end of inductor L2 serves as the output terminal V_Charge of the receiving module 20. More specifically, the ground pin of the voltage regulator chip U1 is grounded.

[0045] Furthermore, combined Figure 2 As shown, the filter voltage regulation unit also includes capacitor C3. One end of capacitor C3 is connected to the other end of inductor L2, and the other end of capacitor C3 is grounded. The inclusion of capacitor C3 further improves the stability of the DC voltage and reduces fluctuations.

[0046] In some implementations, combined Figure 2 and Figure 3 As shown, the charging module 30 includes a charging regulation unit electrically connected to the output terminal V_Charge of the receiving module 20, a status indicator unit electrically connected to the charging regulation unit, and a current regulation unit electrically connected to the charging regulation unit. The charging regulation unit is electrically connected to the energy storage device 500 and is used to convert DC voltage into charging voltage. The status indicator unit is used to display the operating status of the charging regulation unit. The current regulation unit is used to set the output current of the charging regulation unit to the energy storage device 500. Specifically, the charging regulation unit converts DC voltage into a suitable charging voltage according to the status of the energy storage device 500. The charging regulation unit has a charging in progress state and a charging finished state. When the charging regulation unit is in the charging in progress state, it outputs current to the energy storage device 500, causing the energy storage device 500 to increase its charge. When the voltage of the energy storage device 500 rises to near saturation, the charging regulation unit switches from the charging in progress state to the charging finished state. The status indicator unit can display the charging in progress state and the charging finished state, thereby confirming whether the energy storage device 500 is charging.

[0047] In some implementations, combined Figure 3As shown, the charging regulation unit includes a voltage regulator chip U2, whose voltage input pin is electrically connected to the output terminal V_Charge of the receiving module 20. More specifically, the voltage input pin of the voltage regulator chip U2 is electrically connected to the other end of the inductor L2.

[0048] In some implementations, combined Figure 1 As shown, the two status output pins of the voltage regulator chip U2 are electrically connected to the status indicator unit. Specifically, the status output pins of the voltage regulator chip U2 can adjust the status of the status indicator unit by switching between low and high levels.

[0049] In some implementations, combined Figure 3 As shown, the voltage output pin of the voltage regulator chip U2 is electrically connected to the positive terminal of the energy storage device 500, and the constant current setting pin of the voltage regulator chip U2 is electrically connected to the current regulation unit. Specifically, the voltage regulator chip U2 outputs a charging voltage to the energy storage device 500 from its voltage output pin. By setting the corresponding parameters of the current regulation unit, the current output by the voltage regulator chip U2 to the energy storage device 500 during constant current charging can be controlled. Specifically, the ground pin of the voltage regulator chip U2 is grounded.

[0050] In some implementations, combined Figure 3 As shown, the status indication unit includes a resistor R4, a light-emitting diode (LED) D4, and a resistor R5. The output terminal V_Charge of the receiving module 20 is electrically connected to the anode of the LED D4 via resistor R4. The cathode of the LED D4 is electrically connected to one control terminal of the charging adjustment unit via resistor R5. The cathode of the LED D4 is also electrically connected to the other control terminal of the charging adjustment unit. In one embodiment, when both control terminals of the charging adjustment unit are at a high level, the LED D4 is in the off state and no light is emitted. When the control terminal directly connected to the cathode of the LED D4 is at a high level and the control terminal indirectly connected to the cathode of the LED D4 is at a low level, the LED D4 is turned on. Due to the limitations imposed by resistors R4 and R5, the brightness of the LED D4 is low, indicating the charging status. When the control terminal directly connected to the cathode of the LED D4 is at a low level, the LED D4 is turned on and its brightness is higher, only limited by resistor R4, indicating the charging status.

[0051] In one implementation, combined Figure 3 As shown, one status output pin of the voltage regulator chip U2 is electrically connected to one end of resistor R5, and the other status output pin of the voltage regulator chip U2 is electrically connected to the other end of resistor R5.

[0052] In some implementations, combined Figure 3As shown, the current regulation unit includes a resistor R6, which is electrically connected between the charging regulation unit and ground. Specifically, resistor R6 is electrically connected between the constant current setting pin of the voltage regulator chip U2 and ground. More specifically, resistor R6 is inversely proportional to the constant current charging current.

[0053] Furthermore, combined Figure 3 As shown, the charging regulation unit also includes a Zener diode D5. The cathode of Zener diode D5 is connected to the voltage input pin of the voltage regulator chip U2, and the anode of Zener diode D5 is grounded, thereby limiting the input voltage of the voltage regulator chip U2 and preventing damage to the voltage regulator chip U2 due to overvoltage. Furthermore, the charging regulation unit also includes a capacitor C4. One end of capacitor C4 is connected to the voltage input pin of the voltage regulator chip U2, and the other end of capacitor C4 is grounded, thereby reducing DC voltage fluctuations. Furthermore, the charging regulation unit also includes a capacitor C5. One end of capacitor C5 is connected to the voltage output pin of the voltage regulator chip U2, and the other end of capacitor C5 is grounded, thereby improving the stability of the output charging voltage.

[0054] In some implementations, combined Figure 4 As shown, the protection module 40 includes a detection unit and a switching unit. The detection unit is electrically connected to the output terminal V_bat_1S of the charging module 30 and is used to identify the potential of the energy storage device 500. The switching unit is used to form a charging circuit with the charging module 30 and the energy storage device 500, and the switching unit has an on-state and an off-state. The detection unit is used to control the switching unit to switch between the on-state and the off-state. Specifically, when the potential of the energy storage device 500 is too high, the energy storage device 500 may be overcharged, resulting in damage to the energy storage device 500. When the detection unit confirms that the potential of the energy storage device 500 exceeds the threshold, the detection unit sends a control signal to the switching unit, causing the switching unit to switch to the off-state, cutting off the charging circuit, thereby stopping the energy storage device 500 from being further charged in time and avoiding damage to the energy storage device 500.

[0055] In some implementations, combined Figure 4 As shown, the detection unit includes a detection chip U3. The voltage input pin of the detection chip U3 is electrically connected to the output terminal V_bat_1S of the charging module 30. The control output pin of the detection chip U3 is electrically connected to the switching unit and is used to control the switching unit to switch between the connected state and the disconnected state, thereby realizing the control of the switching unit.

[0056] Furthermore, to limit the input current of the voltage input pin of the detection chip U3, the detection unit also includes a resistor R7, which is electrically connected between the voltage input pin of the detection chip U3 and the output terminal V_bat_1S of the charging module 30. Furthermore, the detection unit also includes a capacitor C6, one end of which is electrically connected to the voltage input pin of the detection chip U3, and the other end of which is electrically connected to the negative terminal Battery- of the energy storage device 500. Specifically, the ground of the detection chip U3 is electrically connected to the negative terminal Battery- of the energy storage device 500. Furthermore, the detection unit also includes a resistor R8, which is electrically connected between the overcurrent detection pin of the detection chip U3 and ground, enabling the detection chip U3 to detect overcurrent. When the detection chip U3 detects an overcurrent, it controls the switching unit to switch to the off state.

[0057] In some implementations, combined Figure 4 As shown, the switching unit includes a switching chip U4. One set of source pins of the switching chip U4 is electrically connected to the negative terminal Battery- of the energy storage device 500, and the other set of source pins of the switching chip U4 is grounded. The two drain pins of the switching chip U4 are connected together, and the gate pin of the switching chip U4 is electrically connected to the detection unit. Specifically, the switching chip U4 can integrate a single electronic switching element. The switching chip U4 can also integrate two symmetrically connected electronic switching elements. In one embodiment, the switching chip U4 integrates two symmetrically connected MOSFETs. Due to the parasitic diode effect, as long as one of the electronic switching elements is turned on, the charging circuit can be formed. Specifically, the gate pin of the switching chip U4 is electrically connected to the control output pin of the detection chip U3.

[0058] The above embodiments are merely descriptions of preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.

Claims

1. A fishing camera charging circuit, characterized in that: include: A receiving module, used for inductively coupling with the alternating magnetic field and outputting a DC voltage; A charging module, electrically connected to the output end of the receiving module; The charging module is used to convert the DC voltage into a charging voltage; the output end of the charging module is used to be arranged in the same charging circuit as the energy storage device; and A protection module is electrically connected to the output end of the charging module and is used to identify the potential of the energy storage device; the protection module is also used to control the on and off of the charging circuit.

2. The fishing camera charging circuit according to claim 1, characterized in that: The receiving module includes an induction unit, a rectification unit and a filtering and voltage regulating unit which are electrically connected in sequence; the induction unit is used for inductive coupling with the alternating magnetic field and generating an AC voltage; the rectification unit is used for converting the AC voltage into a pulsating voltage; the filtering and voltage regulating unit is used for reducing the fluctuation of the pulsating voltage and adjusting the voltage amplitude of the pulsating voltage to form the DC voltage; the filtering and voltage regulating unit is electrically connected to the input end of the charging module.

3. The fishing camera charging circuit according to claim 2, characterized in that: The induction unit includes an inductor L1 , one end of the inductor L1 is grounded, and the other end is electrically connected to the input end of the rectifying unit.

4. The fishing camera charging circuit according to claim 2 or 3, characterized in that: The rectifying unit includes a capacitor C1, a diode D1 and a diode D2, the anode of the diode D1 is electrically connected to the sensing unit and one end of the capacitor C1 respectively, the other end of the capacitor C1 is grounded, the cathode of the diode D1 is electrically connected to the input end of the filtering and voltage regulating unit and the cathode of the diode D2, and the anode of the diode D2 is grounded.

5. The fishing camera charging circuit according to claim 2 or 3, characterized in that: The filtering and voltage regulating unit includes a resistor R1, a resistor R2, a resistor R3, a capacitor C2, an inductor L2, a diode D3 and a voltage regulating chip U1. The voltage input pin of the voltage regulating chip U1 is electrically connected to the output end of the rectifier unit. The resistor R1 is connected between the voltage input pin of the voltage regulating chip U1 and the enable pin of the voltage regulating chip U1. The cathode of the diode D3 is electrically connected to the voltage output pin of the voltage regulating chip U1, and the anode of the diode D3 is grounded. One end of the inductor L2 is electrically connected to the voltage output pin of the voltage regulating chip U1, and the other end is used to electrically connect to the energy storage device. The resistor R2 and the resistor R3 are connected in series between the other end of the inductor L2 and the ground. The sampling pin of the voltage regulating chip U1 is electrically connected to the node between the resistor R2 and the resistor R3.

6. The fishing camera charging circuit according to claim 1, characterized in that: The charging module includes a charging adjustment unit electrically connected to the output end of the receiving module, a status indication unit electrically connected to the charging adjustment unit, and a current adjustment unit electrically connected to the charging adjustment unit; the charging adjustment unit is used to electrically connect to the energy storage device and to convert the DC voltage into a charging voltage; the status indication unit is used to display the working status of the charging adjustment unit; and the current adjustment unit is used to set the output current of the charging adjustment unit to the energy storage device.

7. The fishing camera charging circuit according to claim 6, characterized in that: The charging regulation unit includes a voltage regulating chip U2, a voltage input pin of the voltage regulating chip U2 is electrically connected to the output end of the receiving module, two status output pins of the voltage regulating chip U2 are electrically connected to the status indication unit respectively, the voltage output pin of the voltage regulating chip U2 is used to electrically connect to the positive electrode of the energy storage device, and the constant current setting pin of the voltage regulating chip U2 is electrically connected to the current regulating unit.

8. The fishing camera charging circuit according to claim 6 or 7, characterized in that: The status indicating unit includes a resistor R4, a light-emitting diode D4 and a resistor R5. The resistor R4 is electrically connected between the output end of the receiving module and the anode of the light-emitting diode D4. The resistor R5 is electrically connected between the cathode of the light-emitting diode D4 and a control end of the charging regulating unit. The cathode of the light-emitting diode D4 is also electrically connected to another control end of the charging regulating unit.

9. The fishing camera charging circuit according to claim 6 or 7, characterized in that: The current regulating unit includes a resistor R6 , and the resistor R6 is electrically connected between the charge regulating unit and the ground.

10. The fishing camera charging circuit according to claim 1, characterized in that: The protection module includes a detection unit and a switch unit; the detection unit is electrically connected to the output end of the charging module and is used to identify the potential of the energy storage device; the switch unit is used to form the charging circuit with the charging module and the energy storage device; the switch unit has a connected state and a disconnected state; the detection unit is used to control the switch unit to switch between the connected state and the disconnected state.

11. The fishing camera charging circuit according to claim 10, characterized in that: The detection unit includes a detection chip U3, a voltage input pin of the detection chip U3 is electrically connected to the output end of the charging module, and a control output pin of the detection chip U3 is electrically connected to the switch unit and is used to control the switch unit to switch between a connected state and a disconnected state.

12. The fishing camera charging circuit according to claim 10, characterized in that: The switch unit includes a switch chip U4, a group of source pins of the switch chip U4 are used to electrically connect the negative electrode of the energy storage device, another group of source pins of the switch chip U4 are grounded, two drain pins of the switch chip U4 are connected, and the gate pin of the switch chip U4 is electrically connected to the detection unit.

13. A fishing camera device, characterized in that: The fishing camera charging circuit comprises the charging circuit as claimed in any one of claims 1 to 12.

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