Electric field induction alarm device

Abstract

The invention provides an electric field induction alarm device. The electric field induction alarm device comprises a power supply circuit and a control circuit. The control circuit comprises an electric field detection circuit and an alarm output circuit. The power supply circuit is connected with the electric field detection circuit and the alarm output circuit and is used for supplying power to the electric field detection circuit and the alarm output circuit; the electric field detection circuit is connected with the alarm output circuit, the electric field detection circuit is used for detecting the field intensity around the electric field induction alarm device, and when the detected field intensity is larger than a field intensity limit value, the alarm output circuit gives an alarm. According to the electric field induction alarm device, automatic alarm can be carried out through electric field induction, and the automation degree and safety of the alarm device are improved.

Description

Technical Field

[0001] This application belongs to the field of high voltage alarm technology and relates to an electric field sensing alarm device. Background Technology

[0002] In high-voltage testing areas or around high-voltage equipment, fencing is typically erected to ensure personnel safety. Multiple alarm devices, such as warning lights and horns, are usually installed on the fencing, providing warning information by controlling the power supply to these devices. Traditional alarm methods include manual control and equipment linkage. Manual control involves workers manually switching the alarm devices on and off, for example, activating the alarm when applying high voltage and deactivating it when removing it. This method carries the risk of human error and misoperation, potentially causing the alarm devices to fail to activate or deactivate in a timely manner, thus creating safety hazards. Equipment linkage links the alarm devices to high-voltage equipment, for example, controlling the alarm devices' activation and deactivation through the switching signals of the high-voltage equipment. While this method has a high degree of automation, it still carries the risk of equipment failure or abnormal signal transmission. In the event of a failure, all alarm devices may malfunction, failing to provide timely warnings. Therefore, existing alarm methods cannot guarantee timely warnings in all situations, posing significant safety risks. Summary of the Invention

[0003] This application provides an electric field sensing alarm device for safe and timely high-voltage alarm.

[0004] In a first aspect, this application provides an electric field induction alarm device, the electric field induction alarm device comprising: a power supply circuit and a control circuit, the control circuit comprising an electric field detection circuit and an alarm output circuit; the power supply circuit is connected to the electric field detection circuit and the alarm output circuit, and is used to supply power to the electric field detection circuit and the alarm output circuit; the electric field detection circuit is connected to the alarm output circuit, the electric field detection circuit is used to detect the magnitude of the electric field strength around the electric field induction alarm device, and when the detected electric field strength is greater than the electric field strength limit, the alarm output circuit issues an alarm.

[0005] In one implementation of the first aspect, the power supply circuit includes: a rectifier circuit, a charging and discharging circuit, an AC power supply module, and a built-in battery; the input terminal of the rectifier circuit is connected to the AC power supply module, and the output terminal of the rectifier circuit is connected to a first terminal of the charging and discharging circuit; the first terminal of the charging and discharging circuit is connected to a second terminal of the alarm output circuit, and the second terminal of the charging and discharging circuit is connected to the positive terminal of the built-in battery; the negative terminal of the built-in battery is connected to the output terminal of the rectifier circuit and the first terminal of the alarm output circuit.

[0006] In one implementation of the first aspect, the mains power supply module is used to supply power to the control circuit via mains power and to charge the built-in battery via mains power; the built-in battery is used to supply power to the control circuit when there is no mains power.

[0007] In one implementation of the first aspect, the number of built-in batteries is multiple.

[0008] In one implementation of the first aspect, the alarm output circuit further includes: an alarm light and an alarm horn; the alarm light and the alarm horn are connected in parallel; a first end of the alarm light is connected to a first end of the alarm output circuit, and a second end of the alarm light is connected to a second end of the alarm output circuit; a first end of the alarm horn is connected to a first end of the alarm output circuit, and a second end of the alarm horn is connected to a second end of the alarm output circuit.

[0009] In one implementation of the first aspect, the alarm light is an energy-saving, high-brightness LED light bead.

[0010] In one implementation of the first aspect, the alarm horn is a buzzer.

[0011] In one implementation of the first aspect, the control circuit further includes a built-in antenna connected to a first terminal of the electric field detection circuit for detecting the magnitude of the electric field strength around the electric field induction alarm device.

[0012] In one implementation of the first aspect, the control circuit further includes a signal control circuit, which is used to determine the magnitude of the detected field strength. When the magnitude of the detected field strength is greater than the field strength limit, the signal control circuit automatically sends a drive signal to the alarm output circuit, and the alarm output circuit activates the alarm.

[0013] In one implementation of the first aspect, the first terminal of the signal control circuit is connected to the second terminal of the electric field detection circuit, the second terminal of the signal control circuit is connected to the third terminal of the alarm output circuit, the third terminal of the signal control circuit is connected to the first terminal of the charging and discharging circuit, and the fourth terminal of the signal control circuit is connected to the negative terminal of the built-in battery.

[0014] As described above, the electric field sensing alarm device of this application has the following beneficial effects:

[0015] The electric field induction alarm device provided in this application includes a power supply circuit and a control circuit. The control circuit consists of an electric field detection circuit and an alarm output circuit. The power supply circuit provides power to the entire device, and the electric field detection circuit is responsible for detecting the electric field strength of the surrounding environment. When the electric field detection circuit detects that the surrounding electric field strength exceeds the required field strength limit, the alarm output circuit can automatically issue an alarm. Utilizing electric field induction for automatic alarm improves the automation level and safety of the alarm device. Attached Figure Description

[0016] Figure 1 The diagram shown is a structural schematic of the electric field induction alarm device described in an embodiment of this application.

[0017] Figure 2 The diagram shown is a structural schematic of the power supply circuit described in an embodiment of this application.

[0018] Figure 3 The diagram shown is a schematic representation of the alarm output circuit described in an embodiment of this application.

[0019] Figure 4 The diagram shown is a schematic representation of the control circuit described in an embodiment of this application.

[0020] Figure 5 The diagram shown is a schematic representation of the control circuit described in an embodiment of this application.

[0021] Figure 6 The diagram shown is a structural schematic of the electric field induction alarm device described in an embodiment of this application.

[0022] Component designation explanation

[0023] 1. Electric field induction alarm device

[0024] 11 Power supply circuit

[0025] 111 Mains power supply module

[0026] 112 Rectifier Circuit

[0027] a1121 Rectifier Circuit Input Terminal

[0028] a1122 rectifier circuit output terminal

[0029] 113 Charging and discharging circuit

[0030] a1131 charging and discharging circuit first terminal

[0031] a1132 charging and discharging circuit second terminal

[0032] 114 Built-in battery

[0033] 12 Control Circuit

[0034] 121 Electric Field Detection Circuit

[0035] a1211 Electric Field Detection Circuit First Terminal

[0036] a1212 Electric Field Detection Circuit Second Terminal

[0037] 122 Alarm Output Circuit

[0038] a1221 Alarm Output Circuit First Terminal

[0039] a1222 Alarm Output Circuit Second Terminal

[0040] 1221 Warning Light

[0041] a12211 Alarm light first end

[0042] a12212 Alarm light second end

[0043] 1222 Alarm Horn

[0044] a12221 Alarm horn first end

[0045] a12222 Alarm horn second end

[0046] 123 Built-in antenna

[0047] 124 Signal Control Circuit

[0048] a1241 signal control circuit first terminal

[0049] a1242 signal control circuit second terminal

[0050] a1243 Signal Control Circuit Third Terminal

[0051] a1244 signal control circuit fourth terminal Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention 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 the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0054] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0055] In high-voltage testing areas or around high-voltage equipment, fencing is typically erected to ensure personnel safety. Multiple alarm devices, such as warning lights and horns, are usually installed on the fencing, providing warning information by controlling the power supply to these devices. Traditional alarm methods include manual control and equipment linkage. Manual control involves workers manually switching the alarm devices on and off, for example, activating the alarm when applying high voltage and deactivating it when removing it. This method carries the risk of human error and misoperation, potentially causing the alarm devices to fail to activate or deactivate in a timely manner, thus creating safety hazards. Equipment linkage links the alarm devices to high-voltage equipment, for example, controlling the alarm devices' activation and deactivation through the switching signals of the high-voltage equipment. While this method has a high degree of automation, it still carries the risk of equipment failure or abnormal signal transmission. In the event of a failure, all alarm devices may malfunction, failing to provide timely warnings. Therefore, existing alarm methods cannot guarantee timely warnings in all situations, posing significant safety risks.

[0056] At least in response to the above-mentioned problems, the following embodiments of this application provide an electric field sensing alarm device.

[0057] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0058] Figure 1 The diagram shown is a structural schematic of an electric field induction alarm device according to an embodiment of this application. Figure 1 As shown, the electric field induction alarm device 1 includes a power supply circuit 11 and a control circuit 12. The control circuit 12 includes an electric field detection circuit 121 and an alarm output circuit 122. The power supply circuit 121 is connected to the electric field detection circuit 121 and the alarm output circuit 122, and is used to supply power to the electric field detection circuit 121 and the alarm output circuit 122. The electric field detection circuit 121 is connected to the alarm output circuit 122, and is used to detect the magnitude of the electric field strength around the electric field induction alarm device 1. When the detected electric field strength exceeds the field strength limit, the alarm output circuit 122 issues an alarm.

[0059] As described above, the electric field induction alarm device provided in this application includes a power supply circuit and a control circuit. The control circuit consists of an electric field detection circuit and an alarm output circuit. The power supply circuit provides power to the entire device, and the electric field detection circuit is responsible for detecting the electric field strength of the surrounding environment. When the electric field detection circuit detects that the surrounding electric field strength exceeds the required field strength limit, the alarm output circuit can automatically issue an alarm. Utilizing electric field induction for automatic alarm improves the automation level and safety of the alarm device.

[0060] Figure 2 The diagram shown is a structural schematic of a power supply circuit according to an embodiment of this application. Figure 2 As shown, the power supply circuit 11 includes: a mains power supply module 111, a rectifier circuit 112, a charging / discharging circuit 113, and a built-in battery 114. The input terminal a1121 of the rectifier circuit 112 is connected to the mains power supply module 111, and the output terminal a1122 of the rectifier circuit 112 is connected to the first terminal a1131 of the charging / discharging circuit 113. The first terminal a1131 of the charging / discharging circuit 113 is connected to the second terminal a1222 of the alarm output circuit 122, and the second terminal a1132 of the charging / discharging circuit 113 is connected to the positive terminal of the built-in battery 114. The negative terminal of the built-in battery is connected to both the output terminal a1122 of the rectifier circuit 112 and the first terminal a1221 of the alarm output circuit 122.

[0061] The input terminal a1121 of the rectifier circuit 112 is connected to the mains power supply module 111. The alarm device requires direct current (DC) to function properly. The mains power supply module typically uses 220V or 110V alternating current (AC), whose voltage and current vary sinusoidally over time. The rectifier circuit, connected to the mains power supply module, uses diodes and other components to allow current to flow in only one direction, thus converting both the positive and negative half-waves of the AC mains power into DC. By converting the mains power into DC for the alarm device, the rectifier circuit provides a stable power supply.

[0062] The output terminal of the rectifier circuit is connected to the first terminal of the charging / discharging circuit. The first terminal of the charging / discharging circuit is connected to the second terminal of the alarm output circuit, and the second terminal of the charging / discharging circuit is connected to the positive terminal of the built-in battery. The rectifier circuit is connected to the charging / discharging circuit to deliver the rectified DC voltage to the charging / discharging circuit. The DC voltage output by the rectifier circuit has a relatively high voltage, while the charging / discharging circuit needs to charge and discharge according to the battery's voltage characteristics; therefore, the rectified DC voltage needs to be adjusted to a suitable voltage range. The negative terminal of the built-in battery is connected to the output terminal of the rectifier circuit and the first terminal of the alarm output circuit. The charging / discharging circuit is connected to the alarm output circuit to provide a stable DC voltage to the alarm output circuit. The alarm output circuit requires a stable DC voltage to operate normally, and the charging / discharging circuit can provide a stable voltage to the alarm output circuit according to the battery's voltage changes, ensuring that the alarm device can continuously emit an alarm. The charging / discharging circuit has charging and discharging functions. When the charging / discharging circuit is charging, it can store the DC voltage output by the rectifier circuit into the built-in battery, charging the built-in battery. When the mains power fails, the charging and discharging circuit discharges, releasing the electrical energy from the built-in battery to power the alarm output circuit and control circuit, ensuring that the device can continue to operate.

[0063] In one embodiment of this application, the mains power supply module 111 is used to supply power to the control circuit 12 via mains power and to charge the built-in battery 114 via the mains power. The built-in battery is used to supply power to the control circuit when there is no mains power. The built-in battery can serve as a backup power source; when the mains power fails, the built-in battery can act as a backup power source to provide power to the alarm device, ensuring that the device can continue to operate and will not fail due to power outages. At the same time, the built-in battery can also extend the working time of the alarm device, allowing the device to continuously emit alarms even without mains power, providing longer-term protection for personnel safety.

[0064] For example, the number of built-in batteries 114 is multiple. Multiple built-in batteries provide higher reliability, ensuring that even if one battery fails, the others can still function normally, guaranteeing continuous alarm operation. Multiple built-in batteries extend the operating time of the alarm device, providing longer-lasting protection for personnel safety even if one battery is depleted. When battery replacement is needed, only one battery can be replaced, eliminating the need to replace the entire device, simplifying maintenance and replacement.

[0065] Figure 3 The diagram shown is a schematic representation of the alarm output circuit in one embodiment of this application. Figure 3 As shown, the alarm output circuit 122 further includes an alarm light 1221 and an alarm horn 1222. The alarm light 1221 and the alarm horn 1222 are connected in parallel. The first terminal a12211 of the alarm light 1221 is connected to the first terminal a1221 of the alarm output circuit 122, and the second terminal a12212 of the alarm light 1221 is connected to the second terminal a1222 of the alarm output circuit 122. The first terminal a12221 of the alarm horn 1222 is connected to the first terminal a1221 of the alarm output circuit 122, and the second terminal a12222 of the alarm horn 1222 is connected to the second terminal a1222 of the alarm output circuit 122.

[0066] The alarm output circuit is an audible and visual alarm circuit, in which the alarm light and alarm horn are connected in parallel across the two ends of the alarm output circuit. The alarm light receives the current output from the alarm output circuit and sounds the alarm, providing visual and auditory warnings to ensure timely reception of alarm information. The alarm light and alarm horn are connected in parallel, ensuring they do not interfere with each other; even if one fails, the other will continue to function normally, guaranteeing the transmission of alarm information. Furthermore, the number and type of alarm lights and alarm horns can be adjusted according to actual needs to meet different warning requirements.

[0067] For example, the alarm light 1221 is an energy-saving high-brightness LED bulb. The alarm horn 1222 is a buzzer.

[0068] Figure 4 The diagram shown is a schematic representation of the control circuit in one embodiment of this application. Figure 4As shown, the control circuit 12 also includes a built-in antenna 123, which is connected to the first terminal a1211 of the electric field detection circuit 121, and is used to detect the magnitude of the electric field strength around the electric field sensing alarm device. The built-in antenna can sense the electric field strength of the surrounding environment and convert the electric field signal into an electrical signal, which is then transmitted to the electric field detection circuit, exhibiting good detection accuracy and high sensitivity. The electric field detection circuit amplifies and filters the electric field signal transmitted from the built-in antenna to extract the electric field strength information.

[0069] Figure 5 The diagram shown is a schematic representation of the control circuit in one embodiment of this application. Figure 5 As shown, the control circuit 12 further includes a signal control circuit 124, which is used to determine the magnitude of the detected field strength. When the magnitude of the detected field strength is greater than the field strength limit, the signal control circuit 124 automatically sends a drive signal to the alarm output circuit, and the alarm output circuit 122 activates the alarm.

[0070] Specifically, the signal control circuit receives the electric field strength signal transmitted by the electric field detection circuit and determines whether the electric field strength exceeds a preset limit. When the electric field strength exceeds the limit, the signal control circuit outputs a control signal to the alarm output circuit, which then issues an alarm.

[0071] Furthermore, the signal control circuit adjusts the brightness of the alarm light, the volume of the alarm horn, and the alarm interval and duration based on the magnitude of the electric field strength detected by the electric field detection circuit. Different alarm modes can also be set.

[0072] By using a built-in antenna to detect the electric field strength around the alarm device in real time, precise capture of changes in the environmental electric field is achieved. The built-in antenna transmits the sensed electric field signal to the electric field detection circuit, which amplifies and filters the signal to extract accurate electric field strength information. The extracted electric field strength information is then transmitted to the signal control circuit. The signal control circuit judges the electric field strength according to preset safety limits. When the detected electric field strength exceeds the limit, the signal control circuit immediately outputs a control signal to activate the alarm output circuit. After receiving the control signal from the signal control circuit, the alarm output circuit starts the alarm output function.

[0073] The integrated antenna, electric field detection circuit, and signal control circuit work together to achieve the automatic alarm function of the electric field induction alarm device. This automatic alarm method requires no manual intervention, can monitor changes in the ambient electric field in real time, and automatically issue an alarm based on the electric field strength, greatly improving the timeliness and reliability of the alarm and effectively reducing the risk of personnel accidentally entering high-voltage danger zones. The signal control circuit can also set different alarm modes according to different electric field strengths, and alarm through intelligent control, improving the applicability and safety of the alarm device.

[0074] Please continue reading. Figure 5 The first terminal a1241 of the signal control circuit 124 is connected to the second terminal a1212 of the electric field detection circuit 121. The second terminal a1242 of the signal control circuit 124 is connected to the third terminal of the alarm output circuit 122. The third terminal a1243 of the signal control circuit 124 is connected to the first terminal a1131 of the charging and discharging circuit 113. The fourth terminal a1244 of the signal control circuit 124 is connected to the negative terminal of the built-in battery 114.

[0075] The signal control circuit is connected to the charging / discharging circuit, the alarm output circuit, and the built-in battery. It manages the power supply, controlling the operation of the charging / discharging circuit to ensure the built-in battery charges promptly when powered by mains electricity and provides power to the alarm device during power outages, guaranteeing its continuous operation. The signal control circuit also regulates the voltage, controlling the output voltage of the charging / discharging circuit according to different operating modes and the actual needs of the alarm device. This ensures a stable and reliable power supply, achieving intelligent power management and improving the energy efficiency ratio of the alarm device.

[0076] Figure 6 The diagram shown is a structural schematic of an electric field induction alarm device according to an embodiment of this application. Figure 6As shown, the electric field induction alarm device consists of two parts: a power supply circuit and a control circuit. The power supply circuit utilizes a mains power module, a rectifier circuit, a charging / discharging circuit, and a built-in battery, forming a highly efficient and reliable power system. The mains power module receives power from the external power grid. The rectifier circuit converts the AC mains power into DC mains power, which is then supplied to the charging / discharging circuit. When the mains power is normal, the device stores energy in the built-in battery for emergencies. In case of a mains power outage, it can immediately switch to battery power to ensure the continuous operation of the control circuit. In the control circuit, when the sensed electric field strength exceeds the safety limit, the alarm output circuit is activated. The control circuit includes a built-in antenna, an electric field detection circuit, a signal control circuit, and an alarm output circuit. The built-in antenna continuously monitors the high-voltage electric field in the surrounding environment and transmits the electric field signal to the electric field detection circuit. The electric field detection circuit amplifies and filters the electric field signal to extract accurate electric field strength information. Upon receiving the electric field strength information, the signal control circuit immediately compares it with a preset safety limit. If the electric field strength exceeds the safety threshold, the signal control circuit responds quickly, sending a control signal to the alarm output circuit. Upon receiving the signal, the alarm output circuit immediately activates an audible and visual alarm mechanism, effectively alerting personnel to stay away from potentially dangerous areas through both visual and auditory warnings.

[0077] In summary, the electric field induction alarm device provided in this application adds electric field induction technology to the existing alarm device. It uses a built-in antenna and electric field detection circuit to monitor the electric field strength of the surrounding environment in real time. When the electric field strength exceeds a preset safety value, the signal control circuit activates the alarm device automatically, requiring no manual intervention or equipment linkage, resulting in a high degree of automation. Utilizing electric field induction for alarms allows for timely detection and alerts to situations where high-voltage electric field strength exceeds limits, reducing the risk of human error and equipment failure, and ensuring timely warnings in all situations, thus providing higher safety. Furthermore, the addition of a built-in battery allows the electric field induction alarm device to continue operating normally when the mains power module is interrupted, improving the reliability of the alarm device. The electric field induction alarm device of this application provides a more reliable guarantee for the safe operation of high-voltage test sites and high-voltage equipment through automatic alarm based on electric field induction and intelligent alarm control based on the strength of the electric field.

[0078] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0079] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. An electric field sensing alarm device, characterized in that, The electric field sensing alarm device includes: a power supply circuit and a control circuit, wherein the control circuit includes an electric field detection circuit and an alarm output circuit; The power supply circuit is connected to the electric field detection circuit and the alarm output circuit, and is used to supply power to the electric field detection circuit and the alarm output circuit; The electric field detection circuit is connected to the alarm output circuit. The electric field detection circuit is used to detect the magnitude of the electric field strength around the electric field induction alarm device. When the detected electric field strength exceeds the field strength limit, the alarm output circuit issues an alarm.

2. The electric field sensing alarm device according to claim 1, characterized in that, The power supply circuit includes: a rectifier circuit, a charging and discharging circuit, a mains power supply module, and a built-in battery; The input terminal of the rectifier circuit is connected to the mains power supply module, and the output terminal of the rectifier circuit is connected to the first terminal of the charging and discharging circuit. The first terminal of the charging and discharging circuit is connected to the second terminal of the alarm output circuit, and the second terminal of the charging and discharging circuit is connected to the positive terminal of the built-in battery. The negative terminal of the built-in battery is connected to the output terminal of the rectifier circuit and the first terminal of the alarm output circuit.

3. The electric field sensing alarm device according to claim 2, characterized in that, The mains power supply module is used to supply power to the control circuit via mains power and to charge the built-in battery via mains power; The built-in battery is used to power the control circuit when there is no mains power.

4. The electric field sensing alarm device according to claim 2, characterized in that, The number of built-in batteries is multiple.

5. The electric field sensing alarm device according to claim 1, characterized in that, The alarm output circuit also includes: an alarm light and an alarm horn; The alarm light and the alarm horn are connected in parallel. The first end of the alarm light is connected to the first end of the alarm output circuit, and the second end of the alarm light is connected to the second end of the alarm output circuit; The first end of the alarm horn is connected to the first end of the alarm output circuit, and the second end of the alarm horn is connected to the second end of the alarm output circuit.

6. The electric field sensing alarm device according to claim 5, characterized in that, The alarm light uses energy-saving, high-brightness LED beads.

7. The electric field sensing alarm device according to claim 5, characterized in that, The alarm horn is a buzzer.

8. The electric field sensing alarm device according to claim 1, characterized in that, The control circuit also includes a built-in antenna, which is connected to the first end of the electric field detection circuit and is used to detect the magnitude of the electric field strength around the electric field induction alarm device.

9. The electric field sensing alarm device according to claim 1, characterized in that, The control circuit also includes a signal control circuit, which is used to determine the magnitude of the detected field strength. When the magnitude of the detected field strength is greater than the field strength limit, the signal control circuit automatically sends a drive signal to the alarm output circuit, and the alarm output circuit activates the alarm.

10. The electric field sensing alarm device according to claim 9, characterized in that, The first terminal of the signal control circuit is connected to the second terminal of the electric field detection circuit, the second terminal of the signal control circuit is connected to the third terminal of the alarm output circuit, the third terminal of the signal control circuit is connected to the first terminal of the charging and discharging circuit, and the fourth terminal of the signal control circuit is connected to the negative terminal of the built-in battery.

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