Non-contact anti-electric shock bracelet

Abstract

The embodiment of the utility model provides a non-contact anti-electric shock bracelet, which relates to the field of electric shock prevention and comprises an induction coil, a vertical vibration type electric field sensor, a signal coupling amplification circuit, an alarm module and a power supply, wherein the induction coil and the field vertical vibration type electric field sensor are connected with the signal coupling amplification circuit; the signal coupling amplification circuit is grounded after being connected with the alarm module; and the signal coupling and amplifying circuit is also connected with the power supply. According to the technical scheme of the utility model, on the basis of electrostatic induction and electromagnetic induction principles, real-time monitoring of the live-line condition of the alternating-current and direct-current loops is realized, an alarm is given, and the electric shock risk of operators can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric shock prevention technology, and more specifically, to a non-contact electric shock prevention wristband. Background Technology

[0002] In the power industry, electric shock accidents are one of the main dangers threatening the lives of workers, especially in complex environments such as high-voltage transmission lines and substations. Traditional electric shock protection devices typically rely on contact detection or single sensor technology, which suffers from limited detection range, slow response speed, and high false alarm rate, making it difficult to meet the safety requirements in complex environments.

[0003] Currently, most existing electric shock protection devices on the market use contact-based detection methods, such as determining the presence of voltage by placing a metal conductor in contact with a live line. This detection method is not only inefficient but also poses a risk of secondary electric shock. Furthermore, while some non-contact devices can detect electric fields at a certain distance, insufficient sensor sensitivity or limitations in signal processing technology make it difficult to accurately identify live lines in complex electromagnetic environments, resulting in low device reliability.

[0004] Therefore, there is a need for an efficient and reliable non-contact electric shock protection device that can quickly and accurately detect live lines in complex environments and issue timely audible and visual alarms, thereby effectively preventing electric shock accidents. Utility Model Content

[0005] This utility model provides a non-contact anti-electric shock wristband, which achieves non-contact monitoring of live lines by combining an induction coil and a vertical vibration electric field sensor.

[0006] Other features and advantages of this invention will become apparent from the following detailed description, or may be learned in part by practice of this invention.

[0007] According to a first aspect of the present invention, a non-contact anti-electric shock wristband is provided, comprising: an induction coil, a field vertical vibration electric field sensor, a signal coupling amplification circuit, an alarm module, and a power supply;

[0008] The induction coil and the field vertical vibration electric field sensor are connected to the signal coupling amplification circuit.

[0009] The signal coupling amplifier circuit is connected to the alarm module and then grounded.

[0010] The signal coupling amplifier circuit is also connected to the power supply.

[0011] In some embodiments of this utility model, based on the foregoing scheme, the signal coupling amplifier circuit includes: a first transistor, a second transistor, and a third transistor;

[0012] The induction coil and the field vertical vibration electric field sensor are connected to the base of the first transistor;

[0013] The emitter of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the base of the third transistor, and the emitter of the third transistor is connected to the alarm module.

[0014] The collectors of the first transistor, the second transistor, and the third transistor are connected to the power supply.

[0015] In some embodiments of this utility model, based on the aforementioned scheme, a first resistor is connected between the emitter of the first transistor and the base of the second transistor.

[0016] In some embodiments of this utility model, based on the aforementioned scheme, a second resistor is connected between the emitter of the second transistor and the base of the third transistor.

[0017] In some embodiments of this utility model, based on the aforementioned scheme, the alarm module includes: a buzzer and an alarm light connected in parallel.

[0018] In some embodiments of this utility model, based on the foregoing scheme, the field vertical vibration electric field sensor includes: a shielding electrode and a sensing electrode arranged opposite to each other;

[0019] The sensing electrode is connected to the signal coupling amplification circuit.

[0020] The technical solution of this utility model is based on the principles of electrostatic induction and electromagnetic induction, which enables real-time monitoring of the energized status of AC and DC circuits and issues an alarm, effectively reducing the risk of electric shock to workers.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0023] Figure 1A circuit diagram of a non-contact anti-electric shock wristband according to an embodiment of the present invention is shown. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0025] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0026] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of terms can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those shown or described.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The following description, in conjunction with the accompanying drawings, details some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] In order to solve the technical problems existing in the prior art, this utility model provides a non-contact anti-electric shock wristband.

[0031] Specifically, the bracelet includes: an induction coil, a vertical vibration electric field sensor, a signal coupling amplification circuit, an alarm module, and a power supply;

[0032] The induction coil and the field vertical vibration electric field sensor are connected to the signal coupling amplification circuit.

[0033] The signal coupling amplifier circuit is connected to the alarm module and then grounded.

[0034] The signal coupling amplifier circuit is also connected to the power supply.

[0035] It should be noted that in this embodiment, the induction coil is capable of capturing changes in the magnetic field around the energized line, thereby detecting the presence of an energized state. This design features high sensitivity and strong anti-interference capability, enabling it to operate stably in complex electromagnetic environments.

[0036] It should be noted that, in this embodiment, a vertical vibration electric field sensor based on MEMS technology is used to detect the electric field strength generated by the live line. By accurately measuring the change in electric field strength, the presence of the live line can be further confirmed, and a preliminary judgment of the voltage level can be made.

[0037] It should be noted that in this embodiment, when the wearer approaches a live wire, the induction coil detects changes in AC voltage through electromagnetic induction, and the field vertical vibration electric field sensor detects the presence of DC voltage through electric field sensing.

[0038] The induction coil and the vertical vibration electric field sensor generate electrical signals, which are amplified by the signal coupling amplifier circuit and then transmitted to the alarm module. When the amplified signal exceeds the alarm threshold set in the alarm module, the alarm module will sound an alarm to remind the wearer to stay away from the danger zone.

[0039] It should be noted that the alarm module in this embodiment has the function of setting an alarm threshold. When the received signal exceeds the alarm threshold, the alarm module will sound an alarm. This is part of the alarm logic built into the module itself.

[0040] In some feasible embodiments, based on the foregoing scheme, the signal coupling amplifier circuit includes: a first transistor, a second transistor, and a third transistor;

[0041] The induction coil and the field vertical vibration electric field sensor are connected to the base of the first transistor;

[0042] The emitter of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the base of the third transistor, and the emitter of the third transistor is connected to the alarm module.

[0043] The collectors of the first transistor, the second transistor, and the third transistor are connected to the power supply.

[0044] It is understandable that the first, second, and third transistors are connected in a "directly coupled" manner to form a three-stage directly coupled structure. The signal / current transmission logic of this structure is as follows:

[0045] The change in the emitter current of the first transistor drives the base current of the second transistor. The change in the emitter current of the second transistor drives the base current of the third transistor, thereby realizing the interstage signal transmission of multi-stage amplification.

[0046] In some feasible embodiments, based on the aforementioned scheme, a first resistor is connected between the emitter of the first transistor and the base of the second transistor.

[0047] It should be noted that the first resistor is connected in series between the emitter of the first transistor and the base of the second transistor. Its core function is to provide a suitable base bias current for the second transistor, while simultaneously achieving the following two points:

[0048] Current limiting protection: limits the amount of current flowing into the base of the second transistor to prevent damage to the base of the second transistor due to excessive current in the preceding stage (emitter of the first transistor) (the allowable current range of the transistor base is limited, and overcurrent can easily cause breakdown or burnout).

[0049] Stable operating point: In multi-stage direct-coupled circuits, the DC potential is "transferred between stages". The first resistor participates in configuring the DC potential of the base of the second transistor, and together with other components in the circuit (such as the power supply, the emitter-junction voltage drop of the first transistor itself, etc.), ensures that the second transistor operates in the amplification region (avoiding saturation or cutoff distortion).

[0050] In some feasible embodiments, based on the aforementioned scheme, a second resistor is connected between the emitter of the second transistor and the base of the third transistor.

[0051] It should be noted that the second electron is connected in series between the emitter of the second transistor and the base of the third transistor. Its function is similar to the first resistor: to provide a suitable base bias current for the third transistor, and simultaneously achieve:

[0052] Current limiting protection: Limits the current flowing into the base of the third transistor to prevent damage to the third transistor due to base overcurrent.

[0053] Stable operating point: In a multi-stage direct-coupled structure, the second resistor is used to set the DC potential of the base of the third transistor, ensuring that the third transistor operates in the amplification region and maintaining the linear amplification capability of the entire multi-stage amplifier circuit.

[0054] In some feasible embodiments, based on the aforementioned scheme, the alarm module includes: a buzzer and an alarm light connected in parallel.

[0055] It should be noted that the buzzer can produce sound and the alarm light can produce light, so that the person carrying the device is alerted by sound and light when danger is encountered.

[0056] In some feasible embodiments, based on the foregoing scheme, the field vertical vibration electric field sensor includes: a shielding electrode and a sensing electrode arranged opposite to each other;

[0057] The sensing electrode is connected to the signal coupling amplification circuit.

[0058] For example, see Figure 1 The diagram shows a circuit diagram of a non-contact anti-electric shock wristband according to an embodiment of the present invention.

[0059] like Figure 1 As shown, the induction coil and the sensing electrode of the vertical vibration electric field sensor are connected to the base of the first transistor VT1. The emitter of the first transistor VT1 is connected to the base of the second transistor VT2, and the emitter of the second transistor VT2 is connected to the base of the third transistor VT3. The emitter of the third transistor VT3 is connected to a buzzer and an alarm light connected in parallel and then grounded. The collectors of the first transistor VT1, the second transistor VT2, and the third transistor VT3 are all connected to the power supply. The three transistors are directly coupled to form a signal coupling and amplification circuit. The signal generated by the induction coil and the sensing electrode is amplified by the first transistor VT1, the second transistor VT2, and the third transistor VT3 before being transmitted to the buzzer and the alarm light.

[0060] In this configuration, a first resistor R1 is connected in series between the emitter of the first transistor VT1 and the base of the second transistor VT2 to provide a suitable base bias current to the second transistor VT2 and to provide current limiting protection; a second resistor R2 is connected in series between the emitter of the second transistor VT2 and the base of the third transistor VT3 to provide a suitable base bias current to the third transistor VT3 and to provide current limiting protection.

[0061] In summary, this utility model has the following advantages:

[0062] 1. Non-contact detection: It eliminates the need for direct contact with live wires, avoiding the risk of electric shock caused by contact and significantly improving safety.

[0063] 2. Multi-voltage type detection: By combining an induction coil and a vertical vibration electric field sensor, it can simultaneously detect AC and DC voltages, making it suitable for various power environments.

[0064] 3. When a dangerous voltage is detected, the wristband will promptly alert the wearer through an audible and visual alarm, providing immediate safety warnings for electrical workers.

[0065] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that the present invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A non-contact anti-electric shock wristband, characterized in that, include: Induction coil, vertical vibration electric field sensor, signal coupling and amplification circuit, alarm module and power supply; The induction coil and the field vertical vibration electric field sensor are connected to the signal coupling amplification circuit. The signal coupling amplifier circuit is connected to the alarm module and then grounded. The signal coupling amplifier circuit is also connected to the power supply.

2. The non-contact anti-electric shock wristband according to claim 1, characterized in that, The signal coupling amplifier circuit includes: a first transistor, a second transistor, and a third transistor; The induction coil and the field vertical vibration electric field sensor are connected to the base of the first transistor; The emitter of the first transistor is connected to the base of the second transistor, the emitter of the second transistor is connected to the base of the third transistor, and the emitter of the third transistor is connected to the alarm module. The collectors of the first transistor, the second transistor, and the third transistor are connected to the power supply.

3. The non-contact anti-electric shock wristband according to claim 2, characterized in that, A first resistor is connected between the emitter of the first transistor and the base of the second transistor.

4. The non-contact anti-electric shock wristband according to claim 2, characterized in that, A second resistor is connected between the emitter of the second transistor and the base of the third transistor.

5. The non-contact anti-electric shock wristband according to any one of claims 1-4, characterized in that, The alarm module includes a buzzer and an alarm light connected in parallel.

6. The non-contact anti-electric shock wristband according to claim 1, characterized in that, The vertical vibration electric field sensor includes: a shielding electrode and a sensing electrode arranged opposite to each other; The sensing electrode is connected to the signal coupling amplification circuit.

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