Waterproof live detection device and method based on non-contact induction technology

Abstract

The invention belongs to the technical field of electricity detection, and particularly relates to a waterproof live detection device and method based on a non-contact induction technology, and the design of an extension arm enables the position of a main induction coil to be flexibly adjusted. Through the driving motor and the synchronous transmission belt system, the swing angle of the extension arm can be accurately controlled, so that the main induction coil is always in the optimal position in the detection process, and the detection stability and accuracy are improved; besides the main induction coil and the auxiliary coil, conductive coatings are further arranged on the surfaces of the paddles of the device, a magnetic field is cut through high-speed rotation, and the magnetic field intensity around an electric wire can be detected. The multi-layer and multi-functional detection mode enables the device not only to detect the electric field, but also to judge the existence of the current through the magnetic field intensity, thereby greatly expanding the application range and functions of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of electricity measurement, and in particular relates to a waterproof charged detection device and method based on non-contact induction technology. Background Art

[0002] Existing live detection devices mainly rely on handheld or fixed induction devices, which have multiple shortcomings in practical applications. Handheld devices require detection personnel to operate at close range, which poses a risk of electric shock and has a limited detection range, making them difficult to use at high altitudes, in confined spaces, or in water-immersed environments. Although fixed devices can provide certain safety guarantees, their detection positions are fixed, their flexibility is poor, and they cannot adapt to complex and changing on-site environments. In the prior art, the induction coil is usually fixed in one position, with a limited detection range and the inability to flexibly adjust its position. Summary of the invention

[0003] The object of the present invention is to provide a waterproof charging detection device and method based on non-contact induction technology to at least solve one of the problems in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions: A waterproof charged detection device based on non-contact induction technology comprises a support frame, on which four parallel hoisting rods are fixedly mounted, a landing gear is fixed to the bottom end of each hoisting rod, a stable mounting frame is fixed between two adjacent hoisting rods, an auxiliary coil is arranged in the middle of the support frame, a T-shaped frame is fixed on each stable mounting frame so as to be easily disassembled, an extension arm is movably mounted on the T-shaped frame, a support tube is fixed to one end of the extension arm away from the T-shaped frame, a main induction coil is arranged around the support tube, wherein both the main induction coil and the auxiliary coil can detect whether there is an electric field around.

[0005] Preferably, four arms are fixed on the support frame in a manner that is easy to disassemble, a brushless motor is fixed on each arm, and a blade is fixed on the output shaft of the brushless motor.

[0006] Preferably, a first reinforcing plate and a second reinforcing plate are fixedly mounted on the T-shaped frame, and a top wire drum and a bottom wire drum are rotatably mounted between opposite surfaces of the first reinforcing plate and the second reinforcing plate, wherein a top pulley and a bottom pulley are also rotatably mounted on the first reinforcing plate, wherein the top pulley and the top wire drum are fixed and rotate synchronously via a rotating shaft, and the bottom pulley and the bottom wire drum are fixed and rotate synchronously via a rotating shaft, and the bottom pulley and the top pulley are connected via a synchronous transmission belt.

[0007] Preferably, a pull rope is wound around both the top wire drum and the bottom wire drum, the directions in which the pull ropes are wound around the top wire drum and the bottom wire drum are opposite, and one end of the pull ropes wound around the top wire drum and the bottom wire drum is fixed to the extension arm.

[0008] Preferably, a limiting disk is fixed on the second reinforcing plate, a swing block is rotatably installed inside the limiting disk, and the swing block and the bottom wire drum are fixed and rotate synchronously via a rotating shaft.

[0009] Preferably, an obtuse-angle groove is provided on the swing block, and two extrusion limiting columns are symmetrically overlapped in the obtuse-angle groove. An elastic rubber ring is provided between the two extrusion limiting columns to drive the two extrusion limiting columns to contact the inner wall of the limiting disk, and the extrusion limiting columns and the limiting disk are slidingly frictionally fitted, and toggle rods are overlapped on the opposite back surfaces of the two extrusion limiting columns, and there is a gap between the toggle rods and the obtuse-angle groove.

[0010] Preferably, a driving turntable is rotatably mounted on the side of the swing block, a buckle cover is fixedly mounted on the limiting disk, the buckle cover is rotationally matched with the driving turntable, a driving motor is fixedly mounted on the buckle cover, the output shaft of the driving motor is fixedly matched with the driving turntable, and two toggle rods are fixed on the driving turntable.

[0011] Preferably, three NPN transistors are also included, the base of the first NPN transistor is connected to the emitter of the second NPN transistor, the base of the second NPN transistor is connected to the emitter of the third NPN transistor, and the base of the third NPN transistor is connected to the auxiliary coil and / or the main induction coil.

[0012] Preferably, the collectors of the second NPN transistor and the third NPN transistor are both connected to the positive electrode of a 9V DC power supply, and the positive electrode of the 9V DC power supply is also connected to the collector of the first NPN transistor, and a fixed resistor R1 and a fixed resistor R2 are arranged in series on the connection path; wherein the positive terminal of the fixed resistor R2 is connected to the base of the fourth NPN transistor, and the negative terminal of the fixed resistor R2 is connected to the emitter of the fourth NPN transistor, for providing a forward biased trigger voltage to the fourth NPN transistor.

[0013] Preferably, the collector of the fourth NPN transistor is connected to the positive pole of a 12V DC power supply, and an alarm is arranged in series on the connection path, the emitter of the first NPN transistor is connected to the negative pole of the 9V DC power supply, and the emitter of the fourth NPN transistor is connected to the negative pole of the 12V DC power supply.

[0014] An operating method of the waterproof and charged detection device comprises the following steps: According to the space to be measured and the specific position to be measured, the driving motor drives the driving turntable to rotate; the driving turntable drives the toggle rod to rotate, and the toggle rod drives the swing block to rotate through the obtuse groove; the swing block drives the bottom pulley and the bottom wire drum to rotate, and then drives the top pulley and the top wire drum to rotate through the synchronous transmission belt to adjust the position of the main induction coil; When the main induction coil and / or is close to the electric field, an induced current is generated; the induced current is amplified by the series-connected NPN transistors and flows into the negative electrode of the 9V power supply; at the same time, the voltage across the fixed resistor R2 in the collector direction of the first NPN transistor increases; when the potential difference across the fixed resistor R2 is greater than the forward-biased trigger turn-on voltage of the base and emitter of the fourth NPN transistor, the collector and emitter of the fourth NPN transistor are turned on, and the alarm works.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The design of the extension arm of the present invention enables the main induction coil to be flexibly adjusted in position. The swing angle of the extension arm can be accurately controlled by the drive motor and synchronous transmission belt system, thereby ensuring that the main induction coil is always in the best position during the detection process, thereby improving the stability and accuracy of the detection.

[0016] (2) In addition to the main induction coil and the auxiliary coil, the blade surface of the device is also provided with a conductive coating, which can detect the magnetic field strength around the wire by cutting the magnetic field through high-speed rotation. This multi-level and multi-functional detection method enables the device to not only detect the electric field, but also determine the existence of the current through the magnetic field strength, greatly expanding the application scope and function of the device; (3) The present invention adopts a modular design, and various components such as the T-shaped frame, extension arm, brushless motor, etc. can be easily disassembled and replaced. Different numbers of T-shaped frames can be installed on the stable mounting frame as needed, providing high flexibility and adaptability. In addition, the structural design of the entire device is simple and clear, easy to maintain and maintain, and reduces the failure rate and maintenance cost that may be encountered during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram of the installation position of the T-shaped frame of the present invention; Figure 3 It is a structural schematic diagram of the synchronous transmission belt of the present invention; Figure 4 This is a schematic diagram of the support tube structure of the present invention; Figure 5 This is a schematic diagram of the structure of the buckle cover of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle; Figure 7 This is a schematic diagram of the structure of the limiting disk of the present invention; Figure 8 This is the main induction coil detection circuit diagram of the present invention; Fig. 9 This is the auxiliary coil detection circuit diagram of the present invention.

[0018] In the figure: 101-support frame; 102-auxiliary coil; 103-machine arm; 104-brushless motor; 105-blade; 106-hoisting rod; 107-stable mounting frame; 108-landing gear; 109-T-shaped frame; 110-first reinforcement plate; 111-bottom pulley; 112-top pulley; 113-synchronous transmission belt; 114-top wire drum; 115-bottom wire drum; 116-second reinforcement plate; 117-extension arm; 118-pull rope; 119-support tube; 120-main induction coil; 121-limiting disk; 122-driving turntable; 123-buckle cover; 124-driving motor; 125-swing block; 126-obtuse groove; 127-extrusion limiting column; 128-toggle rod; 129-elastic rubber ring. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0020] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more. In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The following is combined with Figure 1-Figure 9 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0024] The present invention provides a waterproof charged detection device based on non-contact induction technology, comprising a support frame 101, on which four parallel hanging rods 106 are fixedly installed, a landing gear 108 is fixed at the bottom end of each hanging rod 106, a stable mounting frame 107 is fixed between two adjacent hanging rods 106, an auxiliary coil 102 is arranged in the middle of the support frame 101, a T-shaped frame 109 is fixed on each stable mounting frame 107 so as to be easy to disassemble, an extension arm 117 is movably installed on the T-shaped frame 109, a support tube 119 is fixed at one end of the extension arm 117 away from the T-shaped frame 109, a main induction coil 120 is arranged around the support tube 119, wherein the main induction coil 120 and the auxiliary coil 102 can both detect whether there is an electric field around.

[0025] Four arms 103 are fixed on the support frame 101 in a manner that is easy to disassemble. A brushless motor 104 is fixed on each arm 103 , and a blade 105 is fixed on the output shaft of the brushless motor 104 .

[0026] A first reinforcing plate 110 and a second reinforcing plate 116 are fixedly mounted on the T-shaped frame 109, and a top wire drum 114 and a bottom wire drum 115 are rotatably mounted between opposite surfaces of the first reinforcing plate 110 and the second reinforcing plate 116, wherein a top pulley 112 and a bottom pulley 111 are also rotatably mounted on the first reinforcing plate 110, wherein the top pulley 112 and the top wire drum 114 are fixed and rotate synchronously via a rotating shaft, and the bottom pulley 111 and the bottom wire drum 115 are fixed and rotate synchronously via a rotating shaft, and the bottom pulley 111 and the top pulley 112 are connected for transmission via a synchronous transmission belt 113.

[0027] A pull rope 118 is wound around the top wire drum 114 and the bottom wire drum 115 . The directions in which the pull rope 118 is wound around the top wire drum 114 and the bottom wire drum 115 are opposite. One end of the pull rope 118 wound around the top wire drum 114 and the bottom wire drum 115 is fixed to the extension arm 117 .

[0028] A limiting disk 121 is fixed on the second reinforcing plate 116 , and a swing block 125 is rotatably installed inside the limiting disk 121 . The swing block 125 is fixed and rotated synchronously with the bottom wire drum 115 via a rotating shaft.

[0029] An obtuse-angled groove 126 is provided on the swing block 125, and two extrusion limiting columns 127 are symmetrically overlapped in the obtuse-angled groove 126. An elastic rubber ring 129 is provided between the two extrusion limiting columns 127, driving the two extrusion limiting columns 127 to contact the inner wall of the limiting disk 121, and the extrusion limiting columns 127 and the limiting disk 121 are slidingly and frictionally fitted, and toggle rods 128 are overlapped on the opposite back surfaces of the two extrusion limiting columns 127, and there is a gap between the toggle rods 128 and the obtuse-angled groove 126.

[0030] A driving turntable 122 is rotatably installed on the side of the swing block 125, and a buckle cover 123 is fixedly installed on the limiting disk 121. The buckle cover 123 rotates with the driving turntable 122, and a driving motor 124 is fixedly installed on the buckle cover 123. The output shaft of the driving motor 124 is fixedly matched with the driving turntable 122, wherein two toggle rods 128 are fixed on the driving turntable 122.

[0031] It also includes three NPN transistors, the base of the first NPN transistor is connected to the emitter of the second NPN transistor, the base of the second NPN transistor is connected to the emitter of the third NPN transistor, and the base of the third NPN transistor is connected to the auxiliary coil 102 and / or the main induction coil 120. The collectors of the second NPN transistor and the third NPN transistor are both connected to the positive electrode of a 9V DC power supply, and the positive electrode of the 9V DC power supply is also connected to the collector of the first NPN transistor, and a fixed resistor R1 and a fixed resistor R2 are arranged in series on the connection path; wherein the positive terminal of the fixed resistor R2 is connected to the base of the fourth NPN transistor, and the negative terminal of the fixed resistor R2 is connected to the emitter of the fourth NPN transistor, so as to provide a forward bias trigger voltage to the fourth NPN transistor. The collector of the fourth NPN transistor is connected to the positive electrode of a 12V DC power supply, and an alarm is set in series on the connection path. The emitter of the first NPN transistor is connected to the negative electrode of the 9V DC power supply, and the emitter of the fourth NPN transistor is connected to the negative electrode of the 12V DC power supply.

[0032] According to the actual situation, select a suitable number of T-shaped frames 109 and install them on the stable mounting frame 107, start the brushless motor 104, and the output shaft of the brushless motor 104 will drive the blades 105 to rotate (the speed of the four brushless motors 104 needs to be controlled by the flight control, and the battery can also be installed on the stable mounting frame 107). Through the coordination of the speed of the four blades 105, the main induction coil 120 is moved to the place where the charged object needs to be detected. It should be noted that the auxiliary coil 102 is generally not used, and only the main induction coil 120 is needed, so in order to reduce the overall weight, the auxiliary coil 102 can be removed. The function of the auxiliary coil 102 is the same as that of the main induction coil 120. Its main purpose is that in actual operation, the space to be tested is small and the extension arm 117 cannot enter.

[0033] According to the space to be measured and the specific position to be measured, the swing of the extension arm 117 is appropriately adjusted so that the main induction coil 120 can be closer to the point to be measured. Specifically, by controlling the rotation of the output shaft of the drive motor 124, the output shaft of the drive motor 124 drives the drive turntable 122 to rotate, and the drive turntable 122 drives the toggle rod 128 to rotate. The rotation of the toggle rod 128 drives the swing block 125 to rotate through the obtuse groove 126 (because the toggle rod 128 is in the obtuse groove 126). The rotation of the swing block 125 drives the bottom pulley 111 to rotate (including the bottom wire drum 115), and then drives the top pulley 112 to rotate through the synchronous transmission belt 113, and the top pulley 112 drives the top wire drum 114 to rotate. When the top wire drum 114 and the bottom wire drum 115 rotate synchronously, because the directions of the pull ropes 118 wound on the top wire drum 114 and the bottom wire drum 115 are opposite, and because the top wire drum 114 and the bottom wire drum 115 rotate in the same direction, if the pull rope 118 on the top wire drum 114 is in the state of releasing the wire, the pull rope 118 on the bottom wire drum 115 is in the state of collecting the wire. The two pull ropes 118 pull the extension arm 117, thereby driving the extension arm 117 to swing on the T-shaped frame 109, thereby adjusting the position of the main induction coil 120. Under the action of vibration or gravity, the extension arm 117 will pull the top wire drum 114 and the bottom wire drum 115 to rotate through the pull rope 118. At this time, in order to prevent the top wire drum 114 and the bottom wire drum 115 from rotating without the drive motor 124, it is necessary to prevent the swing block 125 from rotating. If the swing block 125 rotates, the obtuse groove 126 will rotate, and the rotation of the swing block 125 will drive the internal extrusion limiting column 127 to follow the movement. Since the two extrusion limiting columns 127 are symmetrically arranged, no matter which direction the obtuse groove 126 rotates, there will always be an extrusion limiting column 127 that is subjected to the friction force of the limiting disk 121 and moves in the direction of the corresponding toggle rod 128. The obtuse groove in this direction The space between the limiting plate 126 and the limiting plate 121 is reduced, and the limiting plate 121 and the obtuse angle groove 126 will squeeze the extrusion limiting column 127, so that the extrusion limiting column 127 is stuck between the limiting plate 121 and the obtuse angle groove 126, so the obtuse angle groove 126 and the swing block 125 cannot rotate, but when the toggle rod 128 is used as an active component, the stuck extrusion limiting column 127 will be pushed to move in the direction close to the elastic rubber ring 129, and the limiting plate 121 and the obtuse angle groove 126 will no longer squeeze the extrusion limiting column 127, and the other extrusion limiting column 127 will be affected by the friction force of the limiting plate 121 and will also move in the direction of the elastic rubber ring 129, so it will not be stuck. Therefore, the driving motor 124 does not need to be in the starting state all the time to maintain the swing angle of the extension arm 117, so that the position of the main induction coil 120 is more stable.

[0034] When the main induction coil 120 and / or the auxiliary coil 102 are close to the electric field, an induced current will be generated in the main induction coil 120 and / or the auxiliary coil 102. Since the main induction coil 120 and / or the auxiliary coil 102 are connected to the base of the third NPN transistor, and since the collector of the third NPN transistor has a voltage of 9V, the emitter of the third NPN transistor will amplify the current. Since the NPN transistors are arranged in series, the three NPN transistors arranged in series will amplify the current of the emitter of the previous NPN transistor until the emitter current of the first NPN transistor flows into the negative electrode of the 9V power supply. At the same time, the emitter current of the first NPN transistor is amplified. The voltage across the fixed resistor R2 in the collector direction of the N transistor will increase, so if the induced current at the auxiliary coil 102 and / or the main induction coil 120 is larger, the potential difference between the two points of the fixed resistor R2 will be larger. When the potential difference between the two points of R2 (therefore, the fixed resistor R1 and the fixed resistor R2 are connected in series to play a voltage divider to reduce the voltage across the fixed resistor R2, generally, the base of the NPN transistor provides a forward bias voltage of 0.7V to make the collector and emitter of the NPN transistor conductive) is greater than the forward bias trigger turn-on voltage of the base and emitter of the fourth NPN transistor, the collector and emitter of the fourth NPN transistor are conductive, and the alarm works.

[0035] In addition, two conductive coatings are provided on the surface of the blade 105. The conductive resistivity of the two conductive coatings is different. One end of the two conductive coatings is electrically connected (that is, the two parallel conductive coating lines form a U shape). At this time, when the blade 105 rotates at a high speed, the two conductive coating coils will cut the magnetic field (especially around the wires. There will be a magnetic field around the wires buried underground). Since the rotation speed of the blade 105 is known, it is only necessary to measure the voltage at the two ends of the two conductive coatings that are not connected together to know the strength of the magnetic field, and then it can be determined whether there is current around.

[0036] In an optional embodiment, a method for operating a waterproof and charged detection device based on non-contact sensing technology includes: 1. Equipment preparation The brushless motor 104 is started, and the speed of the four brushless motors 104 is controlled by the flight control to rotate the blades 105, so that the entire device is lifted into the air. The flight direction and height of the device are adjusted by coordinating the speed of the four blades 105, so that the main induction coil 120 moves to the place where the charged object needs to be detected.

[0037] According to the space to be measured and the specific position to be measured, the driving turntable 122 is driven to rotate by controlling the rotation of the output shaft of the driving motor 124. The driving turntable 122 drives the toggle rod 128 to rotate, and the toggle rod 128 drives the swing block 125 to rotate through the obtuse groove 126. The rotation of the swing block 125 drives the bottom pulley 111 including the bottom wire drum 115 to rotate, and then drives the top pulley 112 and the top wire drum 114 to rotate through the synchronous transmission belt 113. Since the pulling rope 118 wound on the top wire drum 114 and the bottom wire drum 115 are in opposite directions, their rotation will cause the pulling rope 118 to pull the extension wall 117, thereby adjusting the swing angle of the extension wall 117 on the T-shaped frame 109, and then adjusting the position of the main induction coil 120.

[0038] When the main induction coil 120 and / or the auxiliary coil 102 are close to the electric field, they will generate an induced current. After being amplified by the series-connected NPN transistors, the induced current flows into the negative electrode of the 9V power supply. At the same time, the voltage across the fixed resistor R2 in the collector direction of the first NPN transistor will increase. When the potential difference across R2 is greater than the forward-biased trigger turn-on voltage of the base and emitter of the fourth NPN transistor, the collector and emitter of the fourth NPN transistor are turned on, and the alarm works.

[0039] Additional function: Detection of magnetic field strength. When the blade (105) rotates at high speed, the two conductive coatings on its surface will cut the magnetic field. Since the two conductive coatings have different conductive resistivities, the strength of the magnetic field can be determined by measuring the voltage at the two ends that are not connected together. Then, it can be determined whether there is current around based on the strength of the magnetic field.

[0040] After the detection is completed, the flight control device is used to return to the starting point or the designated position, and the brushless motor (104) is turned off to land the device and recover it.

[0041] Please note that the above methods are for reference only and should be adjusted according to the specific device and on-site environment during actual operation. At the same time, before operation, it should be ensured that the operator has the corresponding qualifications and skills and strictly abides by the safety operating procedures. In the description of this specification, the description of the reference terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A waterproof and charged detection device based on non-contact induction technology, characterized in that: It comprises a support frame (101), on which four parallel hanging rods (106) are fixedly mounted, a landing gear (108) is fixed at the bottom end of each hanging rod (106), and a stable mounting frame (107) is fixed between two adjacent hanging rods (106); An auxiliary coil (102) is provided in the middle of the support frame (101); A T-shaped frame (109) is fixed on each stable mounting frame (107) so as to be easily disassembled, an extension arm (117) is movably mounted on the T-shaped frame (109), a support tube (119) is fixed to one end of the extension arm (117) away from the T-shaped frame (109), and a main induction coil (120) is arranged around the support tube (119); The main induction coil (120) and the auxiliary coil (102) are both capable of detecting whether there is an electric field in the surroundings.

2. According to claim 1, a waterproof and charged detection device based on non-contact induction technology is characterized in that: Four machine arms (103) are fixed on the support frame (101) in a manner that is easy to disassemble, a brushless motor (104) is fixed on each machine arm (103), and a blade (105) is fixed on the output shaft of the brushless motor (104).

3. The waterproof and charged detection device based on non-contact induction technology according to claim 2 is characterized in that: A first reinforcing plate (110) and a second reinforcing plate (116) are fixedly mounted on the T-shaped frame (109); a top wire drum (114) and a bottom wire drum (115) are rotatably mounted between opposite surfaces of the first reinforcing plate (110) and the second reinforcing plate (116); a top pulley (112) and a bottom pulley (111) are also rotatably mounted on the first reinforcing plate (110); the top pulley (112) and the top wire drum (114) are fixedly rotated synchronously via a rotating shaft; the bottom pulley (111) and the bottom wire drum (115) are fixedly rotated synchronously via a rotating shaft; and the bottom pulley (111) and the top pulley (112) are connected for transmission via a synchronous transmission belt (113).

4. The waterproof and charged detection device based on non-contact induction technology according to claim 3 is characterized in that: A pull rope (118) is wound around the top wire drum (114) and the bottom wire drum (115), and the directions in which the pull rope (118) is wound around the top wire drum (114) and the bottom wire drum (115) are opposite. One end of the pull rope (118) wound around the top wire drum (114) and the bottom wire drum (115) is fixed to the extension arm (117).

5. The waterproof and charged detection device based on non-contact induction technology according to claim 4 is characterized in that: A limiting disk (121) is fixed on the second reinforcing plate (116), a swing block (125) is rotatably mounted inside the limiting disk (121), and the swing block (125) and the bottom wire drum (115) are fixed and rotate synchronously via a rotating shaft.

6. The waterproof and charged detection device based on non-contact induction technology according to claim 5 is characterized in that: An obtuse-angled groove (126) is provided on the swing block (125), and two extrusion limiting columns (127) are symmetrically overlapped in the obtuse-angled groove (126). An elastic rubber ring (129) is provided between the two extrusion limiting columns (127), so that the two extrusion limiting columns (127) are driven to contact the inner wall of the limiting disk (121), and the extrusion limiting columns (127) and the limiting disk (121) are slidably frictionally engaged, and toggle rods (128) are overlapped on opposite back surfaces of the two extrusion limiting columns (127), and a gap is provided between the toggle rods (128) and the obtuse-angled groove (126).

7. The waterproof and charged detection device based on non-contact induction technology according to claim 6 is characterized in that: A driving turntable (122) is rotatably mounted on the side of the swing block (125), a buckle cover (123) is fixedly mounted on the limiting plate (121), the buckle cover (123) and the driving turntable (122) are rotatably matched, a driving motor (124) is fixedly mounted on the buckle cover (123), an output shaft of the driving motor (124) and the driving turntable (122) are fixedly matched, and two toggle rods (128) are fixed on the driving turntable (122).

8. The waterproof and charged detection device based on non-contact induction technology according to claim 7 is characterized in that: It also includes three NPN transistors, the base of the first NPN transistor is connected to the emitter of the second NPN transistor, the base of the second NPN transistor is connected to the emitter of the third NPN transistor, and the base of the third NPN transistor is connected to the auxiliary coil (102) and / or the main induction coil (120).

9. The waterproof and charged detection device based on non-contact induction technology according to claim 8, characterized in that: The collectors of the second NPN transistor and the third NPN transistor are both connected to the positive electrode of a 9V DC power supply, and the positive electrode of the 9V DC power supply is also connected to the collector of the first NPN transistor, and a fixed resistor R1 and a fixed resistor R2 are arranged in series on the connection path; the positive terminal of the fixed resistor R2 is connected to the base of the fourth NPN transistor, and the negative terminal of the fixed resistor R2 is connected to the emitter of the fourth NPN transistor, so as to provide a forward biased trigger voltage to the fourth NPN transistor.

10. An operating method of the waterproof and charged detection device according to claim 9, characterized in that: The steps include: According to the space to be measured and the specific position to be measured, the driving motor (124) drives the driving turntable (122) to rotate; the driving turntable (122) drives the toggle rod (128) to rotate, and the toggle rod (128) drives the swing block (125) to rotate through the obtuse groove (126); the swing block (125) drives the bottom pulley (111) and the bottom wire drum (115) to rotate, and then drives the top pulley (112) and the top wire drum (114) to rotate through the synchronous transmission belt (113), so as to adjust the position of the main induction coil (120); When the main induction coil (120) and / or (auxiliary coil 102) are close to the electric field, an induced current is generated; after being amplified by the series-connected NPN transistors, the induced current flows into the negative electrode of the 9V power supply; at the same time, the voltage across the fixed resistor R2 in the collector direction of the first NPN transistor increases; when the potential difference across the fixed resistor R2 is greater than the forward-biased trigger conduction voltage of the base and emitter of the fourth NPN transistor, the collector and emitter of the fourth NPN transistor are turned on, and the alarm works.

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