Voltage induction circuit of safety helmet

Abstract

The utility model discloses a voltage induction circuit of a safety helmet, which relates to the technical field of safety helmets, and comprises an electromagnetic induction module for converting an electromagnetic signal into an electric signal and outputting the electric signal; the signal input end of the signal amplification module is connected with the output end of the electromagnetic induction module; the control end of the switch is connected with the output end of the signal amplification module, and when the control end of the switch receives the amplified electric signal output by the signal amplification module, the switch is switched on; the prompting module comprises a loudspeaker, a first electrode of the loudspeaker is connected with a positive electrode of the battery, a second electrode of the loudspeaker is connected with an input end of the switch, and an output end of the switch is connected with a negative electrode of the battery. According to the safety helmet, the electromagnetic induction module and the prompting module are arranged on the safety helmet, the electric shock risk is detected through the electromagnetic induction module, and when the electric shock risk exists, a prompt is given out through the prompting module, so that the electric shock risk of operators is reduced, and meanwhile the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety helmets, in particular to a voltage sensing circuit of a safety helmet. Background Art

[0002] As the scale of power grid construction continues to expand, factors such as management deficiencies, unsafe behaviors, and operator distraction in the power industry have led to an increase in operators mistakenly entering live compartments, touching live objects, entering live lines on the same pole, climbing poles by mistake, performing incorrect operations, working without power outages, inducing electricity, and contact or step voltage. This increases the risk of electric shock for operators and reduces work efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a voltage sensing circuit for a safety helmet. An electromagnetic induction module and a prompt module are set on the safety helmet. The electromagnetic induction module detects the risk of electric shock. When there is a risk of electric shock, a prompt is issued through the prompt module to reduce the risk of electric shock for the operator and improve work efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] One aspect of an embodiment of the present utility model provides a voltage sensing circuit for a safety helmet, the voltage sensing circuit comprising: an electromagnetic induction module, the input end of the electromagnetic induction module being used to receive an electromagnetic signal, and converting the electromagnetic signal into an electrical signal and outputting the signal through the output end of the electromagnetic induction module; a signal amplification module, the signal input end of the signal amplification module being connected to the output end of the electromagnetic induction module, the signal amplification module being used to amplify the electrical signal; a switch, the control end of the switch being connected to the output end of the signal amplification module, and the switch being turned on when the control end of the switch receives the amplified electrical signal output by the signal amplification module; a prompt module and a battery, the prompt module comprising a speaker, the first electrode of the speaker being connected to the positive pole of the battery, the second electrode of the speaker being connected to the input end of the switch, and the output end of the switch being connected to the negative pole of the battery.

[0006] In some embodiments, the signal amplification module includes a first NPN transistor and a second NPN transistor, and the switch uses a third NPN transistor. The collector of the first NPN transistor and the collector of the second NPN transistor are both connected to the positive pole of the battery, the base of the first NPN transistor is connected to the output end of the electromagnetic induction module, the emitter of the first NPN transistor is connected to the base of the second NPN transistor, the emitter of the second NPN transistor is connected to the base of the third NPN transistor, the collector of the third NPN transistor is connected to the second electrode of the speaker, and the emitter of the third NPN transistor is connected to the negative pole of the battery.

[0007] In some embodiments, the signal amplification module also includes a first capacitor, a second capacitor, a first resistor and a second resistor, one end of the first capacitor is connected to the emitter of the first NPN transistor, the other end of the first capacitor is connected to the negative electrode of the battery, one end of the second capacitor is connected to one end of the first resistor, one end of the second resistor and the base of the third NPN transistor, the other end of the first resistor is connected to the emitter of the second NPN transistor, and the other end of the second capacitor and the other end of the second resistor are connected to the negative electrode of the battery.

[0008] In some embodiments, the electromagnetic induction module includes a first inductor and a first diode, one end of the first inductor is connected to the cathode of the first diode, the anode of the first diode is connected to the negative electrode of the battery, and the other end of the first inductor is connected to the signal input end of the signal amplification module.

[0009] In some embodiments, the first inductor and the first diode are used to sense electromagnetic signals in a first direction, and the electromagnetic induction module further includes a second inductor and a second diode for sensing a second direction, one end of the second inductor is connected to the cathode of the second diode, the anode of the second diode is connected to the negative electrode of the battery, and the other end of the second inductor is connected to the signal input end of the signal amplification module; the electromagnetic induction module further includes a third inductor and a third diode for sensing a third direction, one end of the third inductor is connected to the cathode of the third diode, the anode of the third diode is connected to the negative electrode of the battery, and the other end of the third inductor is connected to the signal input end of the signal amplification module.

[0010] In some embodiments, the electromagnetic induction module further includes a third capacitor, one end of which is connected to the other end of the first inductor, the other end of the second inductor, and the other end of the third inductor, and the other end of the third capacitor is connected to the negative electrode of the battery.

[0011] In some embodiments, the prompt module also includes a third resistor and a fourth diode, one end of the third resistor is connected to the positive electrode of the battery, the other end of the third resistor is connected to the negative electrode of the fourth diode and the first electrode of the speaker, and the positive electrode of the fourth diode is connected to the second electrode of the speaker.

[0012] In some embodiments, the prompt module further includes a prompt light, and the prompt light is connected in parallel with the speaker.

[0013] A voltage sensing circuit for a safety helmet according to an embodiment of the present invention has at least the following beneficial effects: When the electromagnetic induction module detects an external electromagnetic signal, it indicates the presence of a charged object, posing a risk of electric shock. The electromagnetic induction module converts the electromagnetic signal into an electrical signal and outputs it to the signal amplification module. The signal amplification module amplifies the electrical signal and outputs it to the control terminal of a switch. When the control terminal of the switch receives the amplified electrical signal output by the signal amplification module, the switch is turned on, and the speaker and warning light are powered, emitting an audible and visual alarm to prompt workers to evacuate promptly, thereby reducing the risk of electric shock for workers and improving their work efficiency.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 FIG. 4 is a schematic diagram of a voltage sensing circuit according to an embodiment. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this disclosure will be more comprehensive and complete, and will fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Identical reference numerals in the figures indicate identical or similar parts, and thus repeated descriptions thereof will be omitted.

[0021] The technical solutions of the embodiments of the present application are briefly described below:

[0022] According to some embodiments, Figure 1 As shown, the present application provides a voltage sensing circuit for a helmet, the voltage sensing circuit comprising:

[0023] The electromagnetic induction module receives electromagnetic signals at its input terminal and converts the electromagnetic signals into electrical signals before outputting them through its output terminal.

[0024] A signal amplifying module, wherein the signal input end of the signal amplifying module is connected to the output end of the electromagnetic induction module, and the signal amplifying module is used to amplify the electrical signal;

[0025] A switch, wherein the control end of the switch is connected to the output end of the signal amplification module, and when the control end of the switch receives the amplified electrical signal output by the signal amplification module, the switch is turned on;

[0026] The prompt module and the battery BT include a speaker LS, a first electrode of the speaker LS is connected to the positive electrode of the battery BT, a second electrode of the speaker LS is connected to the input end of the switch, and an output end of the switch is connected to the negative electrode of the battery BT.

[0027] The working principle based on the above embodiment is that when there is a charged body in the outside world, the charged body will generate magnetism and generate an electromagnetic field around it. The electromagnetic induction module detects the existence of an electromagnetic signal in the outside world, and the electromagnetic induction module converts the electromagnetic signal into an electrical signal and outputs it to the signal amplification module. The signal amplification module amplifies the electrical signal and outputs it to the control end of the switch. When the control end of the switch receives the amplified electrical signal output by the signal amplification module, the switch is turned on and the speaker LS is energized to remind the operators to evacuate in time, thereby reducing the risk of electric shock for the operators and improving the work efficiency of the operators.

[0028] When there is no charged object in the outside world, the electromagnetic induction module cannot detect the electromagnetic signal, does not output the electrical signal, the switch is turned off, and the speaker LS does not work.

[0029] The following is in conjunction with the appendix of this manual Figure 1 , the preferred embodiments of the present disclosure are further elaborated in detail.

[0030] According to some embodiments, Figure 1 As shown, the signal amplification module includes a first NPN transistor Q1 and a second NPN transistor Q2, and the switch uses a third NPN transistor Q3. The collector of the first NPN transistor Q1 and the collector of the second NPN transistor Q2 are both connected to the positive electrode of the battery BT, the base of the first NPN transistor Q1 is connected to the output end of the electromagnetic induction module, the emitter of the first NPN transistor Q1 is connected to the base of the second NPN transistor Q2, the emitter of the second NPN transistor Q2 is connected to the base of the third NPN transistor Q3, the collector of the third NPN transistor Q3 is connected to the second electrode of the speaker LS, and the emitter of the third NPN transistor Q3 is connected to the negative electrode of the battery BT.

[0031] Based on the working principle of the above embodiment, when the electromagnetic induction module converts the electromagnetic signal into an electrical signal and outputs it to the base of the first NPN transistor Q1, the emitter of the first NPN transistor Q1 outputs an electrical signal, which is in the amplification area and performs the first amplification. The base of the second NPN transistor Q2 receives the first amplified electrical signal output by the emitter of the first NPN transistor Q1, and the emitter of the second NPN transistor Q2 outputs an electrical signal and performs the second amplification. The base of the third NPN transistor Q3 receives the second amplified electrical signal output by the emitter of the second NPN transistor Q2, and the third NPN transistor Q3 is turned on, and the speaker LS is energized to work to remind the operators to evacuate in time, thereby reducing the risk of electric shock for the operators and improving the work efficiency of the operators.

[0032] According to some embodiments, Figure 1As shown, the signal amplification module also includes a first capacitor C1, a second capacitor C2, a first resistor R1 and a second resistor R2, one end of the first capacitor C1 is connected to the emitter of the first NPN transistor Q1, and the other end of the first capacitor C1 is connected to the negative electrode of the battery BT, one end of the second capacitor C2 is connected to one end of the first resistor R1, one end of the second resistor R2 and the base of the third NPN transistor Q3, the other end of the first resistor R1 is connected to the emitter of the second NPN transistor Q2, and the other end of the second capacitor C2 and the other end of the second resistor R2 are connected to the negative electrode of the battery BT.

[0033] The first capacitor C1 and the second capacitor C2 are used for filtering, the first resistor R1 is used for current limiting, and the second resistor R2 is used to discharge the second capacitor C2 when there is no charged object outside, so that the third NPN transistor Q3 has no shutdown delay.

[0034] According to some embodiments, Figure 1 As shown, the electromagnetic induction module includes a first inductor L1 and a first diode D11, one end of the first inductor L1 is connected to the cathode of the first diode D11, the anode of the first diode D11 is connected to the negative electrode of the battery BT, and the other end of the first inductor L1 is connected to the signal input end of the signal amplification module.

[0035] Further, such as Figure 1 As shown, the first inductor L1 and the first diode D11 are used to sense electromagnetic signals in a first direction. The electromagnetic induction module also includes a second inductor L2 and a second diode D12 for sensing a second direction. One end of the second inductor L2 is connected to the cathode of the second diode D12, the anode of the second diode D12 is connected to the cathode of the battery BT, and the other end of the second inductor L2 is connected to the signal input end of the signal amplification module.

[0036] The electromagnetic induction module also includes a third inductor L3 and a third diode D13 for sensing the third direction. One end of the third inductor L3 is connected to the cathode of the third diode D13, the anode of the third diode D13 is connected to the negative electrode of the battery BT, and the other end of the third inductor L3 is connected to the signal input end of the signal amplification module.

[0037] In some embodiments, the first inductor L1 and the first diode D11 are used to sense electromagnetic signals in the front-to-back direction, the second inductor L2 and the second diode D12 are used to sense electromagnetic signals in the left-to-right direction, and the third inductor L3 and the third diode D13 are used to sense electromagnetic signals in the up-down direction. This allows the helmet to sense electromagnetic signals in all directions, preventing electric shock from different directions.

[0038] According to some embodiments, Figure 1As shown, the electromagnetic induction module further includes a third capacitor C3, one end of the third capacitor C3 is connected to the other end of the first inductor L1, the other end of the second inductor L2 and the other end of the third inductor L3, and the other end of the third capacitor C3 is connected to the negative electrode of the battery BT.

[0039] The third capacitor C3 is used for filtering.

[0040] According to some embodiments, Figure 1 As shown, the prompt module also includes a third resistor R3 and a fourth diode D14. One end of the third resistor R3 is connected to the positive electrode of the battery BT, the other end of the third resistor R3 is connected to the negative electrode of the fourth diode D14 and the first electrode of the speaker LS, and the positive electrode of the fourth diode D14 is connected to the second electrode of the speaker LS.

[0041] The third resistor R3 is used for current limiting, and the fourth diode D14 is used for freewheeling of the speaker LS.

[0042] Further, such as Figure 1 As shown, the prompt module further includes a prompt light D21, which is connected in parallel with the speaker LS.

[0043] Based on the above embodiment, when there is a charged object in the outside world, the speaker LS and the warning light D21 are energized and work, and the sound and light alarms are given at the same time to prevent the workers from not being able to hear the speaker LS alarm in a noisy environment, so as to better remind the workers and enable them to evacuate in time, reducing the risk of electric shock for the workers and improving their work efficiency.

[0044] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0045] While the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present disclosure can be embodied in various forms without departing from the spirit or substance of the application, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A voltage sensing circuit for a helmet, characterized in that: The voltage sensing circuit comprises: An electromagnetic induction module, wherein the input end of the electromagnetic induction module is used to receive an electromagnetic signal, convert the electromagnetic signal into an electrical signal, and output the electrical signal through the output end of the electromagnetic induction module; a signal amplifying module, wherein a signal input end of the signal amplifying module is connected to an output end of the electromagnetic induction module, and the signal amplifying module is used to amplify the electrical signal; a switch, wherein a control end of the switch is connected to the output end of the signal amplification module, and the switch is turned on when the control end of the switch receives the amplified electrical signal output by the signal amplification module; A prompt module and a battery, wherein the prompt module includes a speaker, a first electrode of the speaker is connected to the positive electrode of the battery, a second electrode of the speaker is connected to the input end of the switch, and an output end of the switch is connected to the negative electrode of the battery.

2. The voltage sensing circuit according to claim 1, wherein: The signal amplification module includes a first NPN transistor and a second NPN transistor, and the switch uses a third NPN transistor. The collector of the first NPN transistor and the collector of the second NPN transistor are both connected to the positive pole of the battery, the base of the first NPN transistor is connected to the output end of the electromagnetic induction module, the emitter of the first NPN transistor is connected to the base of the second NPN transistor, the emitter of the second NPN transistor is connected to the base of the third NPN transistor, the collector of the third NPN transistor is connected to the second electrode of the speaker, and the emitter of the third NPN transistor is connected to the negative pole of the battery.

3. The voltage sensing circuit according to claim 2, wherein: The signal amplification module also includes a first capacitor, a second capacitor, a first resistor and a second resistor, one end of the first capacitor is connected to the emitter of the first NPN transistor, the other end of the first capacitor is connected to the negative electrode of the battery, one end of the second capacitor is connected to one end of the first resistor, one end of the second resistor and the base of the third NPN transistor, the other end of the first resistor is connected to the emitter of the second NPN transistor, and the other end of the second capacitor and the other end of the second resistor are connected to the negative electrode of the battery.

4. The voltage sensing circuit according to claim 1, wherein: The electromagnetic induction module includes a first inductor and a first diode, one end of the first inductor is connected to the cathode of the first diode, the anode of the first diode is connected to the negative electrode of the battery, and the other end of the first inductor is connected to the signal input end of the signal amplification module.

5. The voltage sensing circuit according to claim 4, wherein: The first inductor and the first diode are used to sense electromagnetic signals in a first direction. The electromagnetic induction module further includes a second inductor and a second diode for sensing a second direction. One end of the second inductor is connected to the cathode of the second diode, the anode of the second diode is connected to the negative electrode of the battery, and the other end of the second inductor is connected to the signal input end of the signal amplification module. The electromagnetic induction module also includes a third inductor and a third diode for sensing a third direction, one end of the third inductor is connected to the cathode of the third diode, the anode of the third diode is connected to the negative electrode of the battery, and the other end of the third inductor is connected to the signal input end of the signal amplification module.

6. The voltage sensing circuit according to claim 5, wherein: The electromagnetic induction module further includes a third capacitor, one end of which is connected to the other end of the first inductor, the other end of the second inductor and the other end of the third inductor, and the other end of the third capacitor is connected to the negative electrode of the battery.

7. The voltage sensing circuit according to claim 1, wherein: The prompt module also includes a third resistor and a fourth diode, one end of the third resistor is connected to the positive electrode of the battery, the other end of the third resistor is connected to the negative electrode of the fourth diode and the first electrode of the speaker, and the positive electrode of the fourth diode is connected to the second electrode of the speaker.

8. The voltage sensing circuit according to claim 1, wherein: The prompt module further includes a prompt light, and the prompt light is connected in parallel with the speaker.

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