Near-electricity alarm device

Abstract

The utility model discloses a near-electricity alarm device. The near-electricity alarm device comprises a micro-control unit, and a communication unit, an induction electrode, an electricity testing unit and an alarm prompting piece which are electrically connected with the micro-control unit, the electricity testing unit comprises a signal amplification circuit and a comparison circuit, and the micro-control unit can control the amplification factor of the signal amplification circuit and the comparison threshold value of the comparison circuit. The micro-control unit obtains whether the position to be detected is electrified at the corresponding electricity testing gear or not according to the comparison result output by the comparison circuit, and the micro-control unit obtains the electric field intensity of the position to be detected according to the induction voltage obtained by sampling the position to be detected through the induction electrode. According to the near-electricity alarm device provided by the embodiment of the utility model, the adaptability to electricity testing scenes with different voltage grades is improved, and the electricity testing operation under the scenes with unknown voltage grades can be realized.

Description

Technical Field

[0001] This utility model relates to the field of electrical detection equipment for power systems, and in particular to a proximity alarm device. Background Technology

[0002] With the continuous development of science and technology and the continuous improvement of industrialization, the importance of power resources in scientific research, manufacturing, industrial production, and residential life is increasing. Domestic power generation, transmission, transformation, distribution, and consumption industries are constantly developing and innovating. In high-voltage and ultra-high-voltage applications, manual intervention is still unavoidable. Based on this, proximity alarm technology has gradually developed and matured in the process of power modernization, and its importance is becoming increasingly apparent.

[0003] Proximity alarm devices are safety auxiliary tools used to prevent the connection of grounding wires to live areas and to prevent accidental entry into energized zones. They are widely used in maintenance work in AC high-voltage environments such as power, petrochemical, and railway industries. These devices employ non-contact electric field induction detection technology. When the device approaches a high-voltage line or area and detects electricity, it emits an audible and visual alarm to alert personnel to safety. Currently, individual proximity alarm devices are designed for fixed voltage levels and cannot be adapted to different voltage levels in various applications. Utility Model Content

[0004] This invention provides a proximity alarm device that can be configured with voltage detection levels to match different voltage levels and different voltage detection methods, thereby improving its adaptability to different application scenarios.

[0005] This utility model provides a proximity alarm device, which includes a microcontroller unit and a communication unit, a sensing electrode, a voltage detection unit, and an alarm indicator electrically connected to the microcontroller unit. The voltage detection unit includes a signal amplification circuit and a comparison circuit, both electrically connected to the microcontroller unit. The signal amplification circuit is connected between the sensing electrode and the microcontroller unit, and the comparison circuit is electrically connected to the signal amplification circuit. The microcontroller unit can control the amplification factor of the signal amplification circuit and the comparison threshold of the comparison circuit, so that the voltage detection unit has different voltage detection levels and corresponding sensitivities. The microcontroller unit obtains whether the location to be detected is charged at the corresponding voltage detection level based on the comparison result output by the comparison circuit. The microcontroller unit obtains the electric field strength of the location to be detected based on the induced voltage obtained by the sensing electrode sampling the location to be detected.

[0006] According to the foregoing embodiments of this utility model, the proximity alarm device has a first voltage detection mode. In the first voltage detection mode, the microcontroller unit is configured to receive voltage detection level information and sensitivity information corresponding to the target voltage level through the communication unit, and set the voltage detection unit to the corresponding target voltage detection level and target sensitivity according to the voltage detection level information and the sensitivity information. The voltage detection unit outputs a first voltage detection result to the microcontroller unit based on the induced voltage obtained by the sensing electrode sampling the position to be detected. The microcontroller unit is configured to control the alarm prompt to issue an alarm prompt after the first voltage detection result indicates that the induced voltage is energized at the target voltage detection level, and to send the detection voltage level of the position to be detected to the outside through the communication unit.

[0007] According to any of the foregoing embodiments of this utility model, the proximity alarm device has a second voltage detection mode. In the second voltage detection mode, the microcontroller unit is configured to receive voltage detection configuration information including multiple voltage levels through the communication unit, and to sequentially set the voltage detection unit to corresponding multiple voltage detection levels and sensitivities according to the multiple voltage levels in the voltage detection configuration information from high to low. The microcontroller unit is configured to receive the second voltage detection result of the voltage detection unit at each voltage detection level. The microcontroller unit is configured to control the alarm prompt to issue an alarm prompt after at least one second voltage detection result is that there is power, and to send the detection voltage level of the location to be detected to the outside through the communication unit. After all the second voltage detection results are that there is no power, the microcontroller unit sends information that the location to be detected is in a state of no power through the communication unit.

[0008] According to any of the foregoing embodiments of this utility model, the proximity alarm device has a third voltage detection mode. In the third voltage detection mode, the microcontroller unit is configured to obtain the electric field strength of the detection position based on the induced voltage obtained by the sensing electrode sampling the detection position, and determine whether the induced voltage is within the safe voltage range. When the induced voltage is outside the safe voltage range, the alarm prompting device is controlled to issue an alarm prompt, and the electric field strength information of the detection position is sent out through the communication unit. When the induced voltage is within the safe voltage range, the information that the detection position is in a de-energized state is sent out through the communication unit.

[0009] According to any of the foregoing embodiments of the present invention, in the third voltage detection mode, the microcontroller unit is configured to control the alarm indicator to issue different alarm prompts based on the different voltage levels of the induced voltage when the induced voltage is outside the safe voltage range.

[0010] According to any of the foregoing embodiments of the present invention, the microcontroller unit is configured to sample multiple times through the sensing electrode and use the peak voltage of the multiple samples as the sensing voltage.

[0011] According to any of the foregoing embodiments of this utility model, the voltage detection unit further includes an amplification factor adjustment circuit and a reference level adjustment circuit. The amplification factor adjustment circuit is connected between the microcontroller unit and the signal amplification circuit and is used to adjust the amplification factor of the signal amplification circuit. The reference level adjustment circuit is connected between the comparison circuit and the microcontroller unit and is used to adjust the comparison threshold of the comparison circuit.

[0012] According to any of the foregoing embodiments of the present invention, the proximity alarm device further includes a self-test unit, which is electrically connected between the microcontroller unit and the voltage detection unit, and is used to generate a self-test voltage signal under the control of the microcontroller unit.

[0013] According to any of the foregoing embodiments of this utility model, the alarm indicator includes an alarm light and a buzzer.

[0014] According to any of the foregoing embodiments of the present invention, the proximity alarm device further includes: a power supply component, which is electrically connected to the microcontroller unit; and an operation button, which is disposed on the surface of the proximity alarm device and electrically connected to the microcontroller unit.

[0015] According to an embodiment of the present invention, a proximity alarm device includes a microcontroller unit, a communication unit, a sensing electrode, a voltage detection unit, and an alarm indicator. The voltage detection unit includes a signal amplification circuit and a comparison circuit, both electrically connected to the microcontroller unit. The signal amplification circuit is connected between the sensing electrode and the microcontroller unit, and the comparison circuit is electrically connected to the signal amplification circuit. The microcontroller unit can control the amplification factor of the signal amplification circuit and the comparison threshold of the comparison circuit, enabling the voltage detection unit to have different voltage detection levels and corresponding sensitivities. Therefore, on the one hand, the microcontroller unit can determine whether the location to be detected is energized at the corresponding voltage detection level based on the comparison result output by the comparison circuit, thereby achieving effective voltage detection for different voltage levels and improving adaptability to voltage detection scenarios at different voltage levels. Furthermore, the microcontroller unit obtains the electric field strength of the location to be detected based on the induced voltage obtained by the sensing electrode sampling the location. Therefore, in scenarios with unknown voltage levels, the electric field strength of the location to be detected can be obtained by sampling the induced voltage, an analog quantity, thereby determining whether the induced voltage at the location is within a safe voltage range, and realizing voltage detection operation in scenarios with unknown voltage levels. The proximity alarm device includes a communication unit, which facilitates the automatic configuration of the voltage detection range to match different voltage levels via communication. This reduces the risk of errors that can occur when manually switching voltage detection ranges, thus improving the safety of voltage detection operations. The communication unit can also transmit the voltage detection results externally, facilitating the integration of the proximity alarm device into a safety management system and improving its compatibility with such systems. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the proximity alarm device of this utility model;

[0018] Figure 2 This is a flowchart illustrating the first voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0019] Figure 3 This is a schematic diagram of an application scenario of an embodiment of the proximity alarm device of this utility model;

[0020] Figure 4 This is a flowchart illustrating the second voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0021] Figure 5 This is a flowchart illustrating the third voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0025] This utility model provides a proximity alarm device. Figure 1 This is a schematic diagram of an embodiment of the proximity alarm device of this utility model. The proximity alarm device includes a microcontroller unit 110 and a communication unit 120, a sensing electrode 130, a voltage detection unit 140, and an alarm indicator 150 electrically connected to the microcontroller unit 110.

[0026] The voltage detection unit 140 includes a signal amplification circuit 141 and a comparison circuit 144, both electrically connected to the microcontroller unit 110. The signal amplification circuit 141 is connected between the sensing electrode and the microcontroller unit 110, and the comparison circuit 144 is electrically connected to the signal amplification circuit 141. The microcontroller unit 110 can control the amplification factor of the signal amplification circuit 141 and the comparison threshold of the comparison circuit 144, so that the voltage detection unit 140 has different voltage detection levels and corresponding sensitivities. The microcontroller unit 110 obtains whether the position to be detected is charged under the corresponding voltage detection level based on the comparison result output by the comparison circuit 144. The microcontroller unit 110 obtains the electric field strength of the position to be detected based on the induced voltage obtained by the sensing electrode sampling the position to be detected.

[0027] According to an embodiment of the present invention, a proximity alarm device includes a microcontroller unit 110, a communication unit 120, a sensing electrode 130, a voltage detection unit 140, and an alarm indicator 150. The voltage detection unit 140 includes a signal amplification circuit 141 and a comparison circuit 144, both electrically connected to the microcontroller unit 110. The signal amplification circuit 141 is connected between the sensing electrode 130 and the microcontroller unit 110, and the comparison circuit 144 is electrically connected to the signal amplification circuit 141. The microcontroller unit 110 can control the amplification factor of the signal amplification circuit 141 and the comparison threshold of the comparison circuit 144, enabling the voltage detection unit 140 to have different voltage detection levels and corresponding sensitivities. Therefore, on the one hand, the microcontroller unit 110 can determine whether the location to be detected is energized at the corresponding voltage detection level based on the comparison result output by the comparison circuit 144, thereby achieving effective voltage detection for different voltage levels and improving adaptability to voltage detection scenarios at different voltage levels. Furthermore, the microcontroller unit 110 obtains the electric field strength of the location to be detected based on the induced voltage obtained by the sensing electrode 130 sampling the location to be detected. Therefore, in scenarios with unknown voltage levels, the electric field strength at the location to be detected can be obtained by sampling the induced voltage (an analog quantity) at the location to be detected, thereby determining whether the induced voltage at the location to be detected is within a safe voltage range, thus enabling voltage detection operations in scenarios with unknown voltage levels. The proximity alarm device includes a communication unit 120, which facilitates automatic configuration of the voltage detection range to match different voltage levels via communication, reducing the risk of errors that can easily occur when manually switching voltage detection ranges and improving the safety of the voltage detection operation. The communication unit 120 can also transmit the voltage detection results externally, facilitating the integration of the proximity alarm device into the safety management system and improving its adaptability to the safety management system.

[0028] In some embodiments, the proximity alarm device has a first voltage detection mode. Figure 2 This is a flowchart illustrating the first voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0029] In the first voltage detection mode, the microcontroller unit 110 is configured to receive voltage level information and sensitivity information corresponding to the target voltage level via the communication unit 120, and set the voltage detection unit 140 to the corresponding target voltage level and target sensitivity according to the voltage level information and sensitivity information. The voltage detection unit 140 outputs a first voltage detection result to the microcontroller unit 110 based on the induced voltage obtained by the sensing electrode 130 sampling the position to be detected. The microcontroller unit 110 is configured to control the alarm prompting element 150 to issue an alarm prompt after the first voltage detection result is that the induced voltage is energized at the target voltage level, and to send the detection voltage level of the position to be detected to the outside via the communication unit. In some embodiments, the microcontroller unit 110 is configured to send information that the position to be detected is in a no-power state via the communication unit after the first voltage detection result is no power.

[0030] In this article, "the voltage test result is no voltage" and "the location to be tested is in a state of no voltage" means that the induced voltage at the location to be tested is within the safe voltage range, and the value of the induced voltage is not necessarily 0.

[0031] In some embodiments, the communication unit 120 is communicatively connected to the terminal device 200 and the back-end host. The communication unit 120 receives voltage level information from the terminal device 200.

[0032] In the above embodiments, in the first voltage detection mode, the microcontroller unit 110 is configured to receive voltage level information and sensitivity information corresponding to the target voltage level via the communication unit 120, and set the voltage detection unit 140 to the corresponding target voltage level and target sensitivity according to the voltage level information and sensitivity information. When the target voltage level is different, the voltage detection unit 140 is set to different target voltage levels and target sensitivities. The voltage detection unit 140 outputs a first voltage detection result to the microcontroller unit 110 based on the induced voltage obtained by the sensing electrode 130 sampling the detection position. The microcontroller unit 110 is configured to control the alarm prompting element 150 to issue an alarm prompt after the first voltage detection result indicates that the induced voltage is energized at the target voltage level, thereby achieving corresponding and effective voltage detection and alarm prompts for different voltage levels. In the proximity alarm device of the above embodiments, the voltage level is automatically configured to match different voltage levels via wireless communication. The voltage level setting method is convenient and quick, and it can reduce the risk of errors caused by manual physical switching of the voltage level, improving adaptability to different application scenarios while enhancing the safety of voltage detection operations.

[0033] In some embodiments, the microcontroller unit 110 is configured to send energized status information to the outside via the communication unit 120 after each round of voltage detection. For example, the energized status information is reported to a mobile terminal and a background monitoring system. The energized status information includes whether the location to be detected is energized. In some embodiments, the energized status information also includes the induced voltage of the location to be detected and / or the voltage level of the location to be detected.

[0034] In some embodiments, the communication unit 120 and the backend host are wirelessly connected via communication methods such as Bluetooth, infrared, NFC, Zigbee, LoRa, and WiFi. In some embodiments, the communication unit 120 is connected to the backend host through a terminal device 200. The communication unit 120 communicates with the backend host to report the current energized status information to the monitoring backend (backend host), accessing the safety management system for real-time status monitoring, ensuring operational safety, guiding subsequent handling measures, and facilitating more effective safety management.

[0035] In some embodiments, the proximity alarm device further includes a self-test unit 160, which is electrically connected between the microcontroller unit 110 and the voltage detection unit 140, and is used to generate a self-test voltage signal under the control of the microcontroller unit 110.

[0036] In some embodiments, the microcontroller unit 110 is configured to perform a self-test on the proximity alarm device via the self-test unit 160 before each round of voltage testing to detect whether the voltage alarm device is working properly.

[0037] In some embodiments, the alarm indicator 150 includes an alarm light 151 and a buzzer 152. The alarm light 151 is used to emit a light signal, and the buzzer 152 is used to emit an audible signal. The combination of the alarm light 151 and the buzzer 152 enables the alarm indicator 150 to produce different audible and visual cues when the voltage test result is at different voltage levels.

[0038] In some embodiments, the proximity alarm device further includes a power supply unit 170, which is electrically connected to the microcontroller unit 110. The power supply unit 170 is, for example, a lithium battery.

[0039] In some embodiments, the proximity alarm device further includes an operation button 180, which is disposed on the surface of the proximity alarm device and electrically connected to the microcontroller unit 110. The operation button 180 is used for human-machine interaction, such as turning the proximity alarm device on and off, and adjusting the voltage detection level.

[0040] In some embodiments, the proximity alarm device further includes an operating light 190, which is electrically connected to the microcontroller unit 110 and is used to indicate the operating status of the proximity alarm device, such as indicating the current voltage detection mode.

[0041] In some embodiments, the voltage detection unit 140 includes an amplification factor adjustment circuit 142 and a reference level adjustment circuit 143. The amplification factor adjustment circuit 142 is connected between the microcontroller unit 110 and the signal amplification circuit 141, and is used to adjust the amplification factor of the signal amplification circuit 141. The reference level adjustment circuit 143 is connected between the comparator circuit 144 and the microcontroller unit 110, and is used to adjust the comparison threshold of the comparator circuit 144. In some embodiments, the amplification factor adjustment circuit 142 adjusts the amplification factor of the signal amplification circuit 141 according to the voltage detection range. In some embodiments, the reference level adjustment circuit 143 adjusts the comparison threshold of the comparator circuit 144 according to the sensitivity.

[0042] Figure 3This is a schematic diagram illustrating an application scenario of an embodiment of the proximity alarm device of this utility model. The proximity alarm device 100 is mounted, for example, on the insulating rod 310 of the grounding hook via a clamp. The proximity alarm device 100 is communicatively connected to the terminal device 200. After the voltage detection unit 140 is configured, the proximity alarm device approaches the high-voltage busbar 900 along with the grounding hook. When the electric field signal strength of the amplified induced voltage exceeds the voltage threshold configured in the comparison circuit 144, the microcontroller unit 110 receives a high level and determines that there is a danger of electricity, outputs an alarm signal, and simultaneously sends the energized status information outward through the communication unit 120.

[0043] According to the embodiments of this application, the voltage detection module of the proximity alarm device has configurable voltage detection levels and sensitivity for different voltage levels, thereby adapting to power frequency electric field detection in different field environments. The proximity alarm device configures the voltage detection levels through software, avoiding the risks of manual configuration errors in traditional proximity alarms.

[0044] In some embodiments, the proximity alarm device has a second voltage detection mode. Figure 4 This is a flowchart illustrating the second voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0045] In the second voltage detection mode, the microcontroller unit 110 is configured to receive voltage detection configuration information including multiple voltage levels through the communication unit 120, and to sequentially set the voltage detection unit 140 to corresponding multiple voltage detection levels and sensitivities according to the multiple voltage levels in the voltage detection configuration information from high to low. The microcontroller unit 110 receives the second voltage detection result of the voltage detection unit 140 at each voltage detection level. The microcontroller unit 110 is configured to control the alarm prompt 150 to issue an alarm prompt after at least one second voltage detection result is that there is power, and to send the detection voltage level of the location to be detected to the outside through the communication unit 120. After all the second voltage detection results are that there is no power, the microcontroller unit 110 sends the information that the location to be detected is in a state of no power to the outside through the communication unit 120.

[0046] In the above embodiment, the proximity alarm device has a second voltage detection mode. When the voltage level of the location to be detected is unclear, the proximity alarm device can switch to the second voltage detection mode to perform voltage detection on the location to be detected. The microcontroller unit 110 sets the voltage detection unit 140 to multiple voltage levels from high to low according to the voltage detection configuration information, and receives the second voltage detection result from the voltage detection unit 140 at each voltage level. If at least one second voltage detection result indicates voltage, the alarm prompt 150 is controlled to issue an alarm prompt, and the highest voltage level corresponding to the second voltage detection result with voltage is taken as the voltage level of the location to be detected. By performing voltage detection through the second voltage detection mode, the proximity alarm device can switch voltage detection levels in turn when the voltage level of the location to be detected is unclear, thereby realizing proximity detection operation and avoiding missed proximity detections.

[0047] In some embodiments, the microcontroller unit 110 is configured to send energized status information to the outside via the communication unit 120 after each round of voltage detection. For example, the energized status information is reported to a mobile terminal and a background monitoring system. The energized status information includes whether the location to be detected is energized. In some embodiments, the energized status information also includes the induced voltage of the location to be detected and / or the voltage level of the location to be detected.

[0048] The second voltage detection mode of the proximity alarm device can be applied in scenarios such as: when the object being detected (e.g., a high-voltage busbar) is disconnected, its voltage does not immediately drop to zero, leaving residual voltage. For ultra-high-voltage busbars, the residual voltage is also relatively high. A proximity alarm with a single voltage level cannot detect this residual voltage, easily leading to misjudgments and potential accidents during power operations. In the above embodiment, the proximity alarm device solves the problem of unclear voltage levels through multi-level scanning. The amplitude of the voltage sensed by the proximity alarm device is directly proportional to the voltage level and inversely proportional to the square of the distance from the energized equipment. At a fixed distance from the busbar, the higher the voltage level, the higher the amplitude of the sensed voltage. During proximity detection, scanning begins from a preset voltage detection level. If power is detected, an audible and visual alarm is output; if no power is detected, the system moves to the next voltage detection level until all voltage detection levels are scanned. Based on the detection status of different voltage detection levels, the system determines whether the currently detected object is energized and its voltage level.

[0049] In some embodiments, the proximity alarm device has a third voltage detection mode. Figure 5 This is a flowchart illustrating the third voltage detection mode of an embodiment of the proximity alarm device of this utility model.

[0050] In the third voltage detection mode, the microcontroller unit 110 is configured to acquire the electric field strength information of the detection location based on the induced voltage obtained by the sensing electrode 130 sampling the detection location, and determine whether the induced voltage is within the safe voltage range. If the induced voltage is outside the safe voltage range, the microcontroller unit 150 is controlled to issue an alarm prompt, and the electric field strength information of the detection location is sent out through the communication unit 120. If the induced voltage is within the safe voltage range, the microcontroller unit 110 sends out information that the detection location is in a de-energized state through the communication unit 120. In some embodiments, in the third voltage detection mode, the microcontroller unit 110 reports the electric field strength information of the detection location to the background monitoring system, and the background monitoring system calculates the detection voltage level of the detection location based on the electric field strength information.

[0051] In the above embodiments, the proximity alarm device has a third voltage detection mode. When the voltage level of the location to be detected is unclear, the proximity alarm device can be switched to the third voltage detection mode to perform voltage detection on the location to be detected. The microcontroller unit 110 obtains the electric field strength information of the location to be detected based on the induced voltage obtained by the sensing electrode 130 sampling the location to be detected. This facilitates subsequent determination of the voltage level of the induced voltage based on the electric field strength information, determining whether the induced voltage is within the safe voltage range, and controlling the alarm prompting element 150 to issue an alarm prompt when the induced voltage is outside the safe voltage range, thereby realizing the proximity detection operation and avoiding missed proximity alarms.

[0052] In some embodiments, in the third voltage detection mode, the microcontroller unit 110 is configured to control the alarm indicator 150 to issue different alarm prompts based on different voltage levels of the induced voltage when the induced voltage is outside the safe voltage range. In some embodiments, the alarm indicator 150 includes an alarm light 151 and a buzzer 152. The alarm light 151 is used to emit a light signal prompt, and the buzzer 152 is used to emit an audible signal prompt. The combination of the alarm light 151 and the buzzer 152 enables the alarm indicator 150 to generate different audible and visual prompts when the voltage detection result is at different voltage levels. When the induced voltage is at different voltage levels, the microcontroller unit 110 controls the alarm indicator 150 to emit different audible and visual prompts, which facilitates guiding the workers to evacuate in a safe direction.

[0053] In some embodiments, the microcontroller unit 110 is configured to send energized status information to the outside via the communication unit 120 after each round of voltage detection. For example, the energized status information is reported to a mobile terminal and a background monitoring system. The energized status information includes whether the location to be detected is energized. In some embodiments, the energized status information also includes the induced voltage of the location to be detected and / or the voltage level of the location to be detected.

[0054] In the above embodiments, the proximity alarm device can measure the intensity of the induced electric field in real time and output alarm prompts in different ways to guide workers to leave the high-voltage area.

[0055] In some embodiments, the proximity alarm device has both a second voltage detection mode and a third voltage detection mode. When the voltage level of the location to be detected is unclear, the second and third voltage detection modes are combined. In the case of unknown voltage level of the object to be detected, the voltage level can be accurately determined in real time by combining digital and analog detection methods. In dangerous situations, the device can promptly issue audible and visual alarms and report the detection results to the mobile terminal and the background monitoring system to ensure the safety of power operations.

[0056] In some embodiments, the proximity alarm device simultaneously has a first voltage detection mode, a second voltage detection mode, and a third voltage detection mode. When the voltage level of the location to be detected is unclear, the second or third voltage detection mode is used. When the voltage level of the location to be detected is clear, the first voltage detection mode is used, thereby reducing system power consumption and delaying the device's battery replacement cycle.

[0057] In some embodiments, the microcontroller unit 110 is configured to sample multiple times through the sensing electrode 130 and use the peak voltage of the multiple samples as the sensing voltage, thereby ensuring the safety of proximity detection operation.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A proximity alarm device, characterized in that, The device includes a microcontroller unit and a communication unit, a sensing electrode, a voltage detection unit, and an alarm indicator electrically connected to the microcontroller unit. The voltage detection unit includes a signal amplification circuit and a comparison circuit, both electrically connected to the microcontroller unit. The signal amplification circuit is connected between the sensing electrode and the microcontroller unit, and the comparison circuit is electrically connected to the signal amplification circuit. The microcontroller unit can control the amplification factor of the signal amplification circuit and the comparison threshold of the comparison circuit, so that the voltage detection unit has different voltage detection levels and corresponding sensitivities. The microcontroller unit obtains whether the position to be detected is charged at the corresponding voltage detection level based on the comparison result output by the comparison circuit. The microcontroller unit obtains the electric field strength of the position to be detected based on the induced voltage obtained by the sensing electrode sampling the position to be detected.

2. The proximity alarm device as described in claim 1, characterized in that, The proximity alarm device has a first voltage detection mode. In the first voltage detection mode, the microcontroller unit is configured to receive voltage level information and sensitivity information corresponding to the target voltage level through the communication unit, and set the voltage detection unit to the corresponding target voltage level and target sensitivity according to the voltage level information and the sensitivity information. The voltage detection unit outputs a first voltage detection result to the microcontroller unit according to the induced voltage obtained by the sensing electrode sampling the position to be detected. The microcontroller unit is configured to control the alarm prompt to issue an alarm prompt after the first voltage detection result shows that the induced voltage is energized at the target voltage level, and to send the detection voltage level of the position to be detected to the outside through the communication unit.

3. The proximity alarm device as described in claim 1, characterized in that, The proximity alarm device has a second voltage detection mode. In the second voltage detection mode, the microcontroller unit is configured to receive voltage detection configuration information including multiple voltage levels through the communication unit, and to sequentially set the voltage detection unit to corresponding multiple voltage detection levels and sensitivities according to the multiple voltage levels in the voltage detection configuration information from high to low. The microcontroller unit receives the second voltage detection result of the voltage detection unit at each voltage detection level. The microcontroller unit is configured to control the alarm prompt to issue an alarm prompt after at least one second voltage detection result indicates power is present, and to send the detection voltage level of the location to be detected to the outside through the communication unit. After all second voltage detection results indicate no power, the microcontroller unit sends information that the location to be detected is in a no-power state to the outside through the communication unit.

4. The proximity alarm device as described in claim 1, characterized in that, The proximity alarm device has a third voltage detection mode. In the third voltage detection mode, the microcontroller is configured to obtain the electric field strength of the detection position based on the induced voltage obtained by the sensing electrode sampling the detection position, and determine whether the induced voltage is within the safe voltage range. When the induced voltage is outside the safe voltage range, the microcontroller controls the alarm prompt to issue an alarm prompt and sends the electric field strength information of the detection position to the outside through the communication unit. When the induced voltage is within the safe voltage range, the microcontroller sends the information that the detection position is in a de-energized state to the outside through the communication unit.

5. The proximity alarm device as described in claim 4, characterized in that, In the third voltage detection mode, the microcontroller unit is configured to control the alarm indicator to issue different alarm prompts based on the different voltage levels of the induced voltage when the induced voltage is outside the safe voltage range.

6. The proximity alarm device as described in claim 4, characterized in that, The microcontroller unit is configured to sample multiple times through the sensing electrode and use the peak voltage of the multiple samples as the sensing voltage.

7. The proximity alarm device as described in claim 1, characterized in that, The voltage detection unit further includes an amplification factor adjustment circuit and a reference level adjustment circuit. The amplification factor adjustment circuit is connected between the microcontroller unit and the signal amplification circuit and is used to adjust the amplification factor of the signal amplification circuit. The reference level adjustment circuit is connected between the comparison circuit and the microcontroller unit and is used to adjust the comparison threshold of the comparison circuit.

8. The proximity alarm device as described in claim 1, characterized in that, It also includes a self-test unit, which is electrically connected between the microcontroller unit and the voltage detection unit, and is used to generate a self-test voltage signal under the control of the microcontroller unit.

9. The proximity alarm device as described in claim 1, characterized in that, The alarm notification device includes an alarm light and a buzzer.

10. The proximity alarm device as described in claim 1, characterized in that, Also includes: A power supply component, which is electrically connected to the microcontroller unit; An operation button is located on the surface of the proximity alarm device and is electrically connected to the microcontroller unit.

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