Disk tray
By using a monitoring and isolation device for the hard drive tray, the connection between the hard drive and the server is automatically disconnected, which solves the security problems that may occur during long-term operation of the hard drive and improves the security of the server.
Patent Information
- Application Number
- PCT/IB2025/052183
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-25
- Filing Date
- 2025-02-28
- Publication Date
- 2025-10-30
AI Technical Summary
Hard drives may experience safety issues such as smoke or fire during long-term operation, threatening the security of the server.
Design a hard drive tray, comprising a tray body, a monitoring device, and an isolation device. The device monitors for abnormal conditions of the hard drive using sensors, and when an abnormality is detected, the isolation device disconnects the hard drive from the server.
When a hard drive malfunctions, it automatically disconnects from the server, reducing the impact of hard drive failure on the server's hardware security and improving the server's physical security.
Smart Images

Figure IB2025052183_30102025_PF_FP_ABST
Abstract
Description
[0001] Hard drive tray technology
[0002]
[0001] This disclosure relates to the field of server technology, and more particularly to a hard disk tray. Background Art
[0003]
[0002] With the development of cloud computing technology and the promotion of big data technology, the application of servers is becoming increasingly widespread. As server performance continues to improve, the number of hard drives required is also increasing. For example, in some data center server rooms, servers are equipped with multiple SSDs (Solid State Disk or Solid State Drive), mechanical hard drives, or hybrid hard drives. Hard drives are characterized by high power consumption, dense layout, and numerous power supply filtering capacitors. When hard drives operate for extended periods, safety issues such as smoke and fire may occur, threatening server security. In this situation, how to improve the security of connected server equipment when hard drive security problems occur has become an urgent technical problem to be solved. Summary of the Invention
[0004]
[0003] Several aspects of this disclosure provide a hard drive tray for disconnecting the physical connection between the hard drive and the server when a physical security problem occurs, thereby improving the security of the server.
[0005]
[0004] This embodiment of the present disclosure provides a hard disk tray, including: a tray body and a monitoring device and an isolation device mounted on the tray body; wherein, the tray body includes a hard disk slot formed by a top plate, a bottom plate, and a side plate, the hard disk slot being used to accommodate and fix a hard disk; one end of the top plate and one end of the bottom plate are fixed by the side plate, and the other end of the top plate and the other end of the bottom plate form an opening; when the hard disk is connected to a target device through the hard disk tray, the metal contacts of the hard disk are electrically connected to the physical interface of the target device through the opening of the hard disk slot; the monitoring device includes: at least one sensor and a control component connected to the at least one sensor; the control component is used to: determine whether there is an abnormality in the hard disk slot based on the monitoring data provided by the at least one sensor; and, when it is determined that there is an abnormality in the hard disk slot, issue an isolation trigger command; the isolation device is disposed on the outer side of the side plate and electrically connected to the control component, and is used to drive the tray body to move away from the opening when the isolation trigger command is received. To disconnect the metal contacts of the hard drive from the target device.
[0006]
[0005] Optionally, the isolation device includes: a switch assembly electrically connected to the control assembly and a bounce assembly electrically connected to the switch assembly; wherein, the switch assembly is configured to: issue a pop-out command according to the isolation trigger command; and the bounce assembly is configured to: pop out in a direction away from the opening upon receiving the pop-out command.
[0007]
[06] Optionally, the rebound assembly includes: a magnetic switch assembly, a spring compressor, and a spring member; wherein, the magnetic switch assembly is mounted on the galvanic plate, one end of the spring member is mounted on the outer galvanic plate, and the other end is configured to be contactable by the spring compressor; when the magnetic switch assembly is in the open state, it generates an attractive force to control the spring compressor to compress the spring member inwards, so that the spring member enters a stored state; when the magnetic switch assembly receives the eject command, it releases the attractive force on the spring compressor, causing the spring member to eject, thereby driving the hard disk tray to move away from the opening.
[0008]
[07] Optionally, the spring compressor is a cover plate corresponding to the step plate; one end of the cover plate is connected to the outer side of the step plate through an opening and closing member, and the spring member is installed between the outer side of the step plate and the inner side of the cover plate; the other end of the cover plate approaches the magnetic switch assembly under the action of external force and is magnetically connected to the magnetic switch assembly to compress the spring member into a storage state; when the magnetic switch assembly receives the pop-out command, it releases the fixing attraction force on the other end of the cover plate, and the cover plate enters an open state so that the spring member pops out.
[0009]
[08] Optionally, the opening and closing element includes: a chain or a torsion spring.
[0010]
[09] Optionally, the spring is mounted on the end of the example plate away from the connection between the example plate and the cover plate.
[0011]
[10] Optionally, the at least one sensor includes: a temperature sensor; the temperature sensor is disposed between the inner side of the example board and the outer side of the hard disk; the temperature sensor is used to monitor the temperature monitoring data of the hard disk and provide the monitored temperature monitoring data to the control component.
[0012]
[11] Optionally, the at least one sensor includes: a smoke sensor; the sample plate is provided with an air duct opening, the smoke sensor is installed between the inner plate and the outer plate of the hard disk and at a position corresponding to the air duct opening; the smoke sensor is used to monitor smoke monitoring data in the hard disk slot and provide the monitored smoke monitoring data to the control component.
[0013]
[12] Optionally, at least one multimedia component is electrically connected to the control component; the control component is used to: acquire monitoring results based on monitoring data provided by the at least one sensor, and control the at least one multimedia component to output the monitoring results.
[0014]
[13] Optionally, the monitoring device further includes: a power supply component; the power supply component includes: a battery pack and / or a power cord; wherein the battery pack is used to connect to the at least one sensor and the control component to provide power; wherein one end of the power cord is connected to the at least one sensor and the control component, and the other end is provided with a charging interface adapted to the power interface of the target device to draw power from the target device through the charging interface.
[0014] In this embodiment of the present disclosure, the hard disk tray includes a tray body and a monitoring device and an isolation device installed on the tray body. Automatic monitoring of the hard disk can be realized through at least one sensor in the monitoring device. When an abnormality is detected in the hard disk, the isolation device can be controlled to disconnect the connection between the hard disk and the target device. Furthermore, when an abnormality is detected in the hard disk, physical isolation between the hard disk and the connected target device (e.g., a server) can be realized, reducing the impact of hard disk abnormality on the hardware security of the target device and improving the physical security of the target device. Brief Description of the Drawings
[0015]
[0015] The accompanying drawings, which are included to provide a further understanding of this disclosure and constitute a part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:
[0016]
[0016] FIG1 is a schematic diagram of the structure of a hard disk tray provided in an exemplary embodiment of the present disclosure;
[0017]
[0017] Figure 2 is a schematic diagram of the structure of a hard disk tray provided in an exemplary embodiment of this disclosure. Detailed Description
[0018]
[0018] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of this disclosure will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0019]
[0019] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. The singular forms “a,” “said,” and “the” used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two, but does not exclude the inclusion of at least one, unless the context clearly indicates otherwise.
[0020]
[0020] It should be understood that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or A exists alone.
[0021]
[0021] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or system that includes said element.
[0022] When a hard drive operates for an extended period, safety issues such as smoke and fire may occur, thereby threatening server security. To address this technical problem, some embodiments of this disclosure provide a solution. The technical solutions provided by each embodiment of this disclosure are described in detail below with reference to the accompanying drawings.
[0022]
[0023] Figure 1 is a schematic diagram of the structure of a hard disk tray provided in an exemplary embodiment of the present disclosure. As shown in Figure 1, the hard disk tray may include: a tray body 10 and a monitoring device 20 and an isolation device 30 installed on the tray body 10.
[0023]
[0024] The bracket body 10 includes a hard drive slot for accommodating and securing the hard drive 101. As shown in Figure 1, the hard drive slot is formed by a top plate 102, a bottom plate 103, and a side plate 104. One end of the top plate 102 and one end of the bottom plate 103 are secured by the side plate 104, and the other ends of the top plate 102 and the bottom plate 103 form an opening 105, resulting in a horizontally placed U-shaped hard drive slot. As shown in Figure 1, the hard drive 101 can be installed in the hard drive slot using screws. When the hard drive 101 is connected to a target device via the hard drive bracket, the metal contacts 106 of the hard drive 101 are electrically connected to the physical interface of the target device through the opening 105 of the hard drive slot. The target device can be a laptop computer, a desktop computer host, or a server device, etc., and this embodiment is not limited to this.
[0024]
[0025] The monitoring device 20 includes at least one sensor. Each sensor may correspond to one monitoring dimension. For example, the at least one sensor may include at least one of the following: a temperature sensor for monitoring the temperature of the hard drive, a humidity sensor for monitoring the humidity of the hard drive, a smoke sensor for monitoring smoke and fire from the hard drive, and a visual sensor, etc. Figure 1 illustrates the temperature sensor 201 and the smoke sensor 203. It should be understood that in some other embodiments, the monitoring device 20 may also include other types of sensors, which are not illustrated further.
[0025]
[0026] As shown in Figure 1, the monitoring device 20 further includes a control component 202 connected to at least one sensor. The at least one sensor is used to monitor the hard disk 101 from at least one monitoring dimension when the hard disk 101 is installed in the hard disk slot.
[0026]
[0027] The connection between at least one sensor and the control component 202 can be a wired connection via a data cable or a wireless connection via wireless communication technology. This wireless communication technology may include at least one of Bluetooth, infrared, and UWB (Ultra Wide Band) technologies; this embodiment is not limited to these.
[0027]
[0028] In some embodiments, the monitoring device 20 may include a power supply assembly; the power supply assembly may include a battery pack and / or a power cord. The battery pack is used to connect to at least one sensor and the control assembly 202 to provide power. One end of the power cord is connected to the at least one sensor and the control assembly 202, and the other end is provided with a charging interface adapted to the power interface of the target device for drawing power from the target device. Therefore, the monitoring device 20 may draw power from the server backplane containing the hard drive, or it may be powered by a battery pack; this embodiment is not limited to this.
[0028]
[0029] The control component 202 is used to determine whether there is an anomaly in the hard disk drive bay based on monitoring data provided by at least one sensor. Optionally, the control component 202 may include an analog-to-digital converter (ADC) and a processor. The ADC is used to convert the monitoring data provided by at least one sensor from analog signals to digital signals, so that the processor can perform digital signal processing operations.
[0029]
[0030] In this context, a processor is a circuit capable of processing signals. In one implementation, the processor can be a circuit capable of reading and executing instructions, such as a central processing unit (CPU), a microcontroller unit (MCU), a graphics processing unit (GPU) (which can be understood as a type of microprocessor), or a digital signal processor (DSP). In another implementation, the processor can achieve certain functions through the logical relationships of hardware circuits. These logical relationships are fixed or reconfigurable. For example, the processor may be a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as a field-programmable gate array (FPGA). When the processor is implemented as an MCU, the control component 202 may further include a clock source device and a memory device (e.g., Flash memory).
[0030]
[0031] The following will provide an exemplary description of an optional implementation of the anomaly detection operation performed by the control component 202, in conjunction with some sensors.
[0031]
[0032] In some optional embodiments, the monitoring device 20 includes a temperature sensor 201 as shown in FIG. 1. The temperature sensor 201 is disposed between the inner side of the template 104 and the outer side of the hard disk 101. The temperature sensor is used to monitor the temperature data of the hard disk 101 and provides the monitored temperature data to the control component 202. The control component 202 can determine whether there is an abnormality in the hard disk slot based on the temperature monitoring data provided by the temperature sensor 201.
[0032]
[0033] Optionally, in the control component 202, an analog-to-digital converter can be used to perform analog-to-digital conversion on the temperature monitoring data to obtain the temperature value corresponding to the temperature monitoring data. The processor in the control component 202 can determine whether the temperature value is greater than a preset temperature threshold. If it is greater than the preset temperature value, the processor can determine that an abnormality has occurred in the hard drive slot. This abnormality may be caused by reasons such as the hard drive running for too long, the hard drive catching fire, or a failure in the hard drive cooling system.
[0033]
[0034] In some alternative embodiments, at least one sensor includes a smoke sensor 203 as shown in FIG. 1. As shown in FIG. 1, the bracket body 10 has an air duct opening 107 on its inner plate 104. The smoke sensor 203 is installed between the inner plate 104 and the outer plate of the hard drive, at a position corresponding to the air duct opening. The smoke sensor 203 is used to monitor smoke monitoring data in the hard drive slot and provides the monitored smoke monitoring data to the control component 202. The control component 202 can determine whether there is an abnormality in the hard drive slot based on the smoke monitoring data provided by the smoke sensor 203.
[0035] Optionally, in the control component 202, an analog-to-digital converter can be used to perform analog-to-digital conversion on the smoke monitoring data to obtain the smoke concentration value corresponding to the smoke monitoring data. The processor in the control component 202 can determine whether the smoke concentration value is greater than a preset smoke concentration threshold. If it is greater than the preset smoke concentration threshold, the processor can determine that an anomaly has occurred in the hard drive slot.
[0034]
[0036] In some alternative embodiments, at least one sensor includes a temperature sensor 201 and a smoke sensor 203 as shown in FIG1. The control component 202 can determine whether there is an abnormality in the hard disk slot based on the temperature monitoring data provided by the temperature sensor 201 and the smoke monitoring data provided by the smoke sensor 203.
[0035]
[0037] Optionally, in the control component 202, an analog-to-digital converter can be used to perform analog-to-digital conversion on the temperature monitoring data and the smoke monitoring data to obtain the temperature value corresponding to the temperature monitoring data and the smoke concentration value corresponding to the smoke monitoring data, respectively. The processor in the control component 202 can determine whether the temperature value is greater than a preset temperature threshold and whether the smoke concentration value is greater than a preset smoke concentration threshold. If the temperature value is greater than the preset temperature threshold and the smoke concentration value is greater than the preset smoke concentration threshold, the processor can determine that an anomaly has occurred in the hard drive slot.
[0036]
[0038] When the control component 202 determines that there is an abnormality in the hard disk slot based on the above-described embodiment, it may issue an isolation trigger command.
[0037]
[0039] The isolation device 30 is disposed on the outer side 1 of the example board 104 and is electrically connected to the control component 202. When an isolation trigger command is received, it moves away from the opening 105 to disconnect the metal contacts of the hard disk 101 from the target device, thereby reducing the impact on the physical safety of the target device.
[0038]
[0040] In some alternative embodiments, as shown in FIG2, the isolation device 30 may include: a switch assembly 301 electrically connected to the control assembly 202 and a bounce assembly 302 electrically connected to the switch assembly.
[0039]
[0041] The switch assembly 301 is used to: send an eject command to the bounce assembly 302 according to the isolation trigger command. The bounce assembly 302 is used to: eject away from the opening 105 upon receiving the eject command, so as to disconnect the electrical connection between the metal contacts of the hard disk 101 and the target device by utilizing the inertia during ejection.
[0040]
[0042] In some alternative embodiments, the bounce assembly 302 includes: a magnetic switch assembly 3021, a spring compressor 3022, and a spring element 3023.
[0041]
[0043] The magnetic switch assembly 3021 is mounted on the example plate 104. Optionally, the magnetic switch assembly 3021 can be mounted on the inner or outer frame of the example plate 104. The magnetic switch assembly is used to generate a changing magnetic field by changing the energizing current, thereby applying different forces to the spring compressor 3022.
[0042]
[0044] One end of the spring 3023 can be mounted on the outer edge of the template 104, and the other end is configured to be contacted by the spring compressor 3022. When the magnetic switch assembly 3021 is in the open state, it generates a large attractive force on the spring compressor 3022, thereby controlling the spring compressor 3022 to compress inward into the template 104, so that the spring 3023 enters a stored state. When the magnetic switch assembly 3021 receives a pop-out command, it can release the attractive force on the spring compressor 3022, causing the spring 3023 to pop out. At the moment the spring 3023 pops out, it can drive the hard disk tray to move away from the opening 105, thereby disconnecting the metal contacts of the hard disk 101 from the target device.
[0043]
[0045] In some optional embodiments, the spring compressor 3022 can be implemented as a cover plate corresponding to the example plate 104. As shown in FIG2, one end of the cover plate is connected to the outer side of the example plate 104 via an opening / closing member 108, and the spring member 3023 is installed between the outer side of the example plate 104 and the inner side of the cover plate. The opening / closing member 108 can be a small chain or torsion spring, etc., and this embodiment is not limited thereto. The other end of the cover plate approaches and connects to the magnetic switch assembly 3021 under external force, compressing the spring member 3023 into a stored state. For example, after connecting the hard drive installed in the bracket to the server, the installer can manually press the cover plate, causing it to be fixed by the attraction generated by the magnetic switch assembly 3021, thereby causing the spring member 3023 to enter a stored state. When the magnetic switch assembly 3021 receives a pop-out command, it can release the fixing attraction on the other end of the cover plate, causing the cover plate to open and allowing the spring member 3023 to pop out.
[0044]
[0046] Optionally, the spring 3023 can be installed on the example plate 104 at an end away from the connection between the example plate 104 and the cover plate. When the cover plate enters the open state, the further away from the connection point on the cover plate, the greater the opening distance. Furthermore, the opened cover plate may not obstruct the spring 3023 from ejecting, or may obstruct the spring 3023 as little as possible. This allows the spring 3023 to fully spring back to its free length, ensuring sufficient inertia.
[0045]
[0047] Based on the above structure, automatic monitoring of the hard drive can be achieved through at least one sensor in the monitoring device. When an anomaly is detected in the hard drive, the isolation device can be controlled to disconnect the hard drive from the target device. Furthermore, when an anomaly is detected, physical isolation can be achieved between the hard drive and the connected target device (e.g., a server), reducing the impact of hard drive anomalies on the hardware security of the target device and improving the physical security of the target device.
[0046]
[0048] In some optional embodiments, it further includes: at least one multimedia component electrically connected to the control component 202; the control component 202 is configured to: acquire monitoring results based on monitoring data provided by at least one sensor, and control the at least one multimedia component to output the monitoring results. Optionally, the multimedia component may include: a display component and / or a playback component.
[0047]
[0049] The display component can be implemented as an indicator light or a monitor. The indicator light can be a digital tube or an LED (Light Emitting Diode). The monitor can be an LED monitor or an LCD (Liquid Crystal Display).
[0048] Crystal Display (LCD). This player can be implemented as a voice player or a buzzer, etc.
[0049]
[0050] Optionally, the control component 202 can send the acquired monitoring results to a display for visual presentation to the user. For example, the control component 202 can send the acquired temperature value and / or smoke concentration value to the display in real time. Alternatively, the control component 202 can control the LED to display a specific color (e.g., red) when the temperature value is greater than a preset temperature threshold; or, the control component 202 can control the LED to display a specific color when the smoke concentration value is greater than a preset smoke concentration threshold. Optionally, the control component 202 can control the playback of the player based on the acquired monitoring results. For example, the control component 202 can broadcast the acquired temperature value and / or smoke concentration value through a voice player according to a set broadcast cycle. Another example is that the control component 202 can control a buzzer to sound when the temperature value is greater than a preset temperature threshold; or, the control component 202 can control a buzzer to sound when the smoke concentration value is greater than a preset smoke concentration threshold.
[0050]
[0051] Based on this implementation method, the monitoring results of the hard drive can be provided to the user intuitively, so that the user can intuitively perceive the safety status of the hard drive in the bracket.
[0051]
[0052] The above description is merely an embodiment of this disclosure and is not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of the claims of this disclosure.
Claims
Claims 1. A hard drive tray, comprising: The device comprises a tray body and a monitoring device and an isolation device mounted on the tray body; wherein the tray body includes a hard drive slot formed by a top plate, a bottom plate, and a side plate, the hard drive slot being used to accommodate and fix a hard drive; one end of the top plate and one end of the bottom plate are fixed by the side plate, and the other end of the top plate and the other end of the bottom plate form an opening; when the hard drive is connected to a target device through the hard drive tray, the metal contacts of the hard drive are electrically connected to the physical interface of the target device through the opening of the hard drive slot; the monitoring device includes: at least one sensor and a control component connected to the at least one sensor; the control component is used to: determine whether there is an abnormality in the hard drive slot based on the monitoring data provided by the at least one sensor; and, when an abnormality is determined to exist in the hard drive slot, issue an isolation trigger command; the isolation device is disposed on the outer side of the side plate and electrically connected to the control component, and is used to move the tray body away from the opening when the isolation trigger command is received, so as to disconnect the connection between the metal contacts of the hard drive and the target device.
2. The hard disk tray according to claim 1, wherein, The isolation device includes: a switch assembly electrically connected to the control assembly and a bounce assembly electrically connected to the switch assembly; wherein the switch assembly is configured to: issue a pop-out command according to the isolation trigger command; and the bounce assembly is configured to: pop out in a direction away from the opening upon receiving the pop-out command.
3. The hard disk tray according to claim 2, wherein, The rebound assembly includes: a magnetic switch assembly, a spring compressor, and a spring element; wherein, the magnetic switch assembly is mounted on the plate, one end of the spring element is mounted on the outer side of the plate, and the other end is configured to be contacted by the spring compressor; when the magnetic switch assembly is in the open state, it generates an attractive force to control the spring compressor to compress the spring compressor into the plate, so that the spring element enters a stored state; when the magnetic switch assembly receives the eject command, it releases the attractive force on the spring compressor, causing the spring element to eject, thereby driving the hard drive tray to move away from the opening.
4. The hard drive bracket according to claim 3, wherein, The spring compressor is a cover plate corresponding to the g1 plate; one end of the cover plate is connected to the outer side of the g1 plate via an opening and closing member, and the spring member is installed between the outer side of the g1 plate and the inner side of the cover plate; the other end of the cover plate approaches the magnetic switch assembly under the action of external force and is magnetically connected to the magnetic switch assembly to compress the spring member into a stored state; when the magnetic switch assembly receives the pop-out command, it releases the fixed attraction force on the other end of the cover plate, and the cover plate enters an open state to allow the spring member to pop out.
5. The hard disk tray according to claim 4, wherein, The opening and closing component includes: a chain or a torsion spring. 9 6. The hard disk tray according to claim 4, wherein, The spring is mounted on the end of the example plate away from the connection between the cover plate and the purlin.
7. The hard disk tray according to any one of claims 1-6, wherein, The at least one sensor includes: a temperature sensor; the temperature sensor is disposed between the inner frame of the template and the outer frame of the hard disk; the temperature sensor is used to monitor the temperature monitoring data of the hard disk and provide the monitored temperature monitoring data to the control component.
8. The hard disk tray according to any one of claims 1-6, wherein, The at least one sensor includes: a smoke sensor; the example board has an air duct opening, the smoke sensor is installed between the inner part of the example board and the outer part of the hard disk and at a position corresponding to the air duct opening; the smoke sensor is used to monitor smoke monitoring data in the hard disk slot and provide the monitored smoke monitoring data to the control component.
9. The hard disk tray according to any one of claims 1-6, further comprising: At least one multimedia component electrically connected to the control component; the control component is used to: acquire monitoring results based on monitoring data provided by the at least one sensor, and control the at least one multimedia component to output the monitoring results.
10. The hard disk tray according to any one of claims 1-6, wherein, The monitoring device further includes: a power supply assembly; the power supply assembly includes: a battery pack and / or a power cord; wherein the battery pack is used to connect to the at least one sensor and the control assembly to provide power; wherein one end of the power cord is connected to the at least one sensor and the control assembly, and the other end is provided with a charging interface adapted to the power interface of the target device to draw power from the target device through the charging interface.