A passive bluetooth tag system applied to a device box

Abstract

This application provides a passive Bluetooth tag system for use in equipment enclosures. By installing an LED light source assembly on the top of the enclosure and configuring a lens assembly coaxially with it on the light-emitting side, the light emitted by the LED is angle-constrained and focused, resulting in a light intensity distribution in the area where the passive Bluetooth tag is located that is higher than the tag's activation threshold. This significantly improves the light intensity per unit area reaching the tag and the light energy utilization rate while maintaining low LED power, thereby achieving stable power supply to the passive Bluetooth tag. It enables long-life, maintenance-free wireless acquisition and uploading of parameters such as temperature and humidity from multiple monitoring points inside the enclosure without wiring or battery replacement, balancing system security, reliability, and maintenance costs.

Description

Technical Field

[0001] This application relates to the field of equipment status monitoring technology, and in particular to a passive Bluetooth tag system for use in equipment enclosures. Background Technology

[0002] In communication, power, and industrial control scenarios, a large number of electronic devices are installed in enclosed or semi-enclosed equipment enclosures. These enclosures have compact internal structures and high device density, and also present complex environmental conditions such as temperature, humidity, and electromagnetic fields. To ensure long-term stable operation of the equipment, it is usually necessary to monitor parameters such as temperature, humidity, and vibration inside the enclosure in real time. Existing solutions mostly use wired powered sensors or wireless sensors with built-in batteries: on the one hand, wiring solutions require laying power and signal lines in confined spaces, which is complex to construct and costly to modify. Furthermore, the wiring itself may pose safety hazards in high-voltage and electromagnetic environments. On the other hand, while battery-powered wireless sensors reduce wiring, they require regular battery replacement as usage time increases, resulting in a large maintenance workload. In addition, batteries are prone to leakage and bulging in high-temperature and high-humidity environments, affecting system reliability. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a passive Bluetooth tag system for use in equipment enclosures. By installing an LED light source assembly on the top of the enclosure and configuring a lens assembly coaxially with it on the light-emitting side, the light emitted by the LED is angle-constrained and focused, resulting in a light intensity distribution in the area where the passive Bluetooth tag is located that is higher than the tag's activation threshold. This significantly improves the light intensity per unit area reaching the tag and the light energy utilization rate while maintaining low LED power, thereby achieving stable power supply to the passive Bluetooth tag. It enables long-life, maintenance-free wireless collection and uploading of parameters such as temperature and humidity from multiple monitoring points inside the enclosure without wiring or battery replacement, balancing system security, reliability, and maintenance costs.

[0004] In a first aspect, embodiments of this application provide a passive Bluetooth tag system applied to a device box, comprising: The equipment housing body has a top mounting portion for mounting lighting components; An LED light source assembly is fixedly installed on the top mounting part and is used to emit illumination light into the interior of the equipment housing. A lens assembly is disposed on the light-emitting side of the LED light source assembly and arranged coaxially with the optical axis of the LED light source assembly; A passive Bluetooth tag is disposed inside the device housing and within the optical axis coverage area of ​​the lens assembly; The lens assembly is a light-collecting structure used to compress the light emission angle of the LED light source assembly. The light-incident surface of the lens assembly faces the LED light source assembly, and the light-emitting surface faces the passive Bluetooth tag. The passive Bluetooth tag is provided with a light energy collection area, which is located within the light spot formed by the light emitted from the lens assembly, so as to convert the light energy collected by the lens assembly into electrical energy to power the passive Bluetooth tag.

[0005] In conjunction with the first aspect, this application provides a first possible implementation of the first aspect, wherein the LED light source assembly includes a mounting base and at least one LED bead fixed on the mounting base; The mounting base is fixedly connected to the top mounting part of the equipment box body, so that the light emission direction of the LED lamp beads is facing the internal space of the equipment box.

[0006] In conjunction with the first aspect, this application provides a second possible implementation of the first aspect, wherein the lens assembly includes a lens body and a fixing structure connected to the lens body; The fixing structure is detachably connected to the mounting base to adjust the distance between the lens assembly and the LED light source assembly while ensuring that their optical axes are aligned.

[0007] In conjunction with the first aspect, this application provides a third possible implementation of the first aspect, wherein the lens body is one of a convex lens, a Fresnel lens, or a multi-segment combination lens; The refractive structure of the lens body is used to reduce the divergence angle of the original light emission of the LED lamp bead, so that the light spot area after the light is emitted by the lens assembly is smaller than the light spot area formed by the LED light source assembly emitting light directly at the same distance without passing through the lens.

[0008] In conjunction with the first aspect, this application provides a fourth possible implementation of the first aspect, wherein the passive Bluetooth tag includes: Label housing; A light energy collection unit is disposed inside the label housing, and the light-receiving surface of the light energy collection unit forms the light energy collection area; The energy management circuit board is electrically connected to the light energy harvesting unit; A Bluetooth communication circuit board electrically connected to the energy management circuit board; The light energy acquisition unit, energy management circuit board, and Bluetooth communication circuit board are all integrated into the tag housing, forming an integrated passive Bluetooth tag structure.

[0009] In conjunction with the first aspect, this application provides a fifth possible implementation of the first aspect, wherein the passive Bluetooth tag is further provided with an antenna unit electrically connected to the Bluetooth communication circuit board; The antenna unit is located on the outside of the tag housing or close to the inner wall of the housing to optimize Bluetooth signal radiation within the device housing.

[0010] In conjunction with the first aspect, this application provides a sixth possible implementation of the first aspect, wherein the passive Bluetooth tag is provided with at least one sensor, the sensor including one or more of a temperature sensor, a humidity sensor, a barometric pressure sensor and an accelerometer. The sensor is mounted on the tag housing and electrically connected to the Bluetooth communication circuit board to transmit the collected environmental parameters to the Bluetooth base station via Bluetooth signals.

[0011] In conjunction with the first aspect, this application provides a seventh possible implementation of the first aspect, wherein the minimum operating light intensity threshold of the light energy harvesting unit is greater than 200 lux; The cooperation between the lens assembly and the LED light source assembly ensures that the light intensity at the light energy collection area where the passive Bluetooth tag is located is not lower than the working light intensity threshold.

[0012] In conjunction with the first aspect, this application provides an eighth possible implementation of the first aspect, wherein the device housing body is provided with a mounting surface for mounting the passive Bluetooth tag; The mounting surface is located below the optical axis of the lens assembly, and the distance between it and the lens assembly is less than the preset maximum transmission distance, so as to reduce diffusion loss during light transmission.

[0013] In conjunction with the first aspect, this application provides a ninth possible implementation of the first aspect, wherein the device housing body is provided with multiple passive Bluetooth tag mounting positions; One passive Bluetooth tag can be installed at each of the passive Bluetooth tag mounting positions, and multiple passive Bluetooth tags are used to monitor environmental parameters at different locations inside the device box. The LED light source assembly and the lens assembly are positioned such that the light energy collection area of ​​each passive Bluetooth tag is within the light emission coverage area of ​​the lens assembly.

[0014] This application provides a passive Bluetooth tag system for use in a device enclosure. By installing an LED light source assembly on the top of the enclosure and a coaxial lens assembly on its light-emitting side, the system constrains and concentrates the light emitted by the LED, creating a light intensity distribution in the area where the passive Bluetooth tag is located that exceeds the tag's activation threshold. This significantly improves the light intensity per unit area reaching the tag and the light energy utilization rate while maintaining low LED power, thereby achieving stable power supply to the passive Bluetooth tag. It enables long-life, maintenance-free wireless data acquisition and uploading of parameters such as temperature and humidity from multiple monitoring points inside the enclosure without the need for wiring or battery replacement, balancing system security, reliability, and maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of a passive Bluetooth tag system applied to a device box is provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of a passive Bluetooth tag provided in an embodiment of the present utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] 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 illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In existing communication, power, and industrial control scenarios, a large number of electronic devices are installed in enclosed or semi-enclosed equipment enclosures. These enclosures have compact internal structures and high device density, and also present complex environmental conditions such as temperature, humidity, and electromagnetic fields. To ensure long-term stable operation of the equipment, it is usually necessary to monitor parameters such as temperature, humidity, and vibration inside the enclosure in real time. Existing solutions mostly use wired powered sensors or wireless sensors with built-in batteries. On the one hand, wiring solutions require laying power and signal lines in confined spaces, which is complex to construct, costly to modify, and the wiring itself may pose safety hazards in high-voltage and electromagnetic environments. On the other hand, although battery-powered wireless sensors reduce wiring, the batteries need to be replaced regularly as the usage time increases, resulting in a large maintenance workload. Furthermore, batteries are at risk of leakage and bulging in high-temperature and high-humidity environments, affecting system reliability.

[0024] This application provides a passive Bluetooth tag system for use in a device enclosure. By installing an LED light source assembly on the top of the enclosure and a lens assembly coaxially positioned on its light-emitting side, the system constrains and concentrates the emitted light, creating a light intensity distribution in the area where the passive Bluetooth tag is located that exceeds the tag's activation threshold. This significantly improves the light intensity per unit area reaching the tag and the light energy utilization rate while maintaining low LED power, thereby achieving stable power supply to the passive Bluetooth tag. The system enables long-life, maintenance-free wireless data acquisition and uploading of parameters such as temperature and humidity from multiple monitoring points inside the enclosure without the need for wiring or battery replacement, balancing system security, reliability, and maintenance costs.

[0025] Please see Figure 1 , Figure 1 This is a schematic diagram of a passive Bluetooth tag system applied to a device box, as provided in this embodiment.

[0026] like Figure 1 As shown in the figure, the passive Bluetooth tag system for device boxes provided in this embodiment includes: device box body 11, LED light source assembly 12, lens assembly 13 and passive Bluetooth tag 14.

[0027] Specifically, the device housing 11 has a top mounting portion for mounting lighting components. The lens assembly 13 is disposed on the light-emitting side of the LED light source assembly 12 and is arranged coaxially with the optical axis of the LED light source assembly 12. The passive Bluetooth tag 14 is disposed inside the device housing 11 and is located within the optical axis coverage area of ​​the lens assembly 13. The lens assembly 13 is a light-collecting structure for compressing the light emission angle of the LED light source assembly 12. The light-incident surface of the lens assembly 13 faces the LED light source assembly 12, and the light-emitting surface faces the passive Bluetooth tag 14. The passive Bluetooth tag 14 is provided with a light energy collection area, which is located within the light spot formed by the light emitted from the lens assembly 13, so as to convert the light energy concentrated by the lens assembly 13 into electrical energy to power the passive Bluetooth tag 14.

[0028] In specific implementations, the equipment enclosure 11 is preferably made of metal or an engineering plastic enclosure with a certain shielding capability. The interior of the equipment enclosure 11 is used to install the electrical equipment or electronic modules to be monitored. The top of its inner cavity is provided with a top mounting part for installing lighting components, such as pre-fabricated mounting holes, reinforcing ribs, or mounting plates on the top plate. The LED light source assembly 12 is fixedly installed on the top mounting part, so that the light emission direction of the LED light source assembly 12 faces the internal space of the equipment enclosure 11, thereby forming a downward illuminating area inside the equipment enclosure.

[0029] Here, the lens assembly 13 is disposed on the light-emitting side of the LED light source assembly 12, preferably coaxially arranged with the optical axis of the LED light source assembly 12. The lens assembly 13 is a light-collecting structure for compressing the emission angle of the LED light source assembly 12, with its light-incident surface facing the LED light source assembly 12 and its light-emitting surface facing the interior of the device housing 11. During operation, the light emitted by the LED light source assembly 12 first enters the light-incident surface of the lens assembly 13. After refraction by the lens assembly 13, a beam with a reduced divergence angle is formed in space. This results in a relatively smaller spot area formed by the beam inside the device housing 11 after a certain transmission distance, thereby significantly increasing the light intensity per unit area within that spot area.

[0030] Here, the passive Bluetooth tag 14 is disposed inside the device housing 11, preferably installed near the light spot area, for example, fixed to the side wall, bottom, or internal support of the device housing 11. The passive Bluetooth tag 14 has a light-collecting area on its side facing the LED light source assembly 12. This light-collecting area is located within the light spot area formed by the light emitted from the lens assembly 13, ensuring that the light energy concentrated by the lens assembly 13 can fully illuminate the light-collecting area. The light-collecting area can be a photovoltaic collecting surface or other photoelectric conversion structure disposed on the surface of the passive Bluetooth tag 14, used to convert the received light energy into electrical energy to provide operating power for the internal circuitry of the passive Bluetooth tag 14.

[0031] In this embodiment, by setting a lens assembly 13 at the light-emitting end of the LED light source assembly 12, the emitted light of the LED light source assembly 12 is angle-constrained and focused, making the light reaching the location of the passive Bluetooth tag 14 more concentrated. This ensures that the passive Bluetooth tag 14 can still obtain sufficient light energy for its operation even at a relatively long distance inside the device housing 11. After the passive Bluetooth tag 14 obtains electrical energy converted from the light energy collection area, its internal Bluetooth communication circuit can be driven to work, transmitting the collected data related to the device housing environment to an external receiving device via Bluetooth signal, thereby realizing wireless monitoring of the internal status of the device housing.

[0032] It should be noted that the minimum operating light intensity threshold of the light energy harvesting unit is greater than 200 lux; the cooperation between the lens assembly and the LED light source assembly ensures that the light intensity at the light energy harvesting area where the passive Bluetooth tag is located is not lower than this operating light intensity threshold.

[0033] In some alternative embodiments, the lens assembly 13 can be any one or more of the following forms: a convex lens, a Fresnel lens, or a multi-segment combination lens, to adapt to LED light source assemblies 12 with different emission angles and power. The lens assembly 13 can be connected to the top mounting part or the mounting structure of the LED light source assembly 12 by means of threaded connection, snap-fit ​​connection, or screw fixation, thereby facilitating later maintenance or replacement while ensuring coaxiality of the optical axis.

[0034] In some alternative embodiments, the mounting position of the passive Bluetooth tag 14 relative to the lens assembly 13 can be adjusted according to the internal spatial layout of the device housing, as long as its light-collecting area is within the coverage area of ​​the light spot formed by the light emitted from the lens assembly 13. For example, when the devices inside the device housing are mainly concentrated at the bottom of the housing, the passive Bluetooth tag 14 can be mounted on the side wall near the bottom; when it is necessary to monitor environmental parameters near the top, the passive Bluetooth tag 14 can also be mounted on the inner wall near the top.

[0035] It should be noted that by reasonably designing the distance and relative height between the lens assembly 13 and the passive Bluetooth tag 14, the passive Bluetooth tag 14 can obtain sufficient light intensity in different installation positions, thereby maintaining the applicability and flexibility of the system.

[0036] In one possible implementation, the LED light source assembly 12 includes a mounting base and at least one LED bead fixed to the mounting base; the mounting base is fixedly connected to the top mounting portion of the equipment housing body 11, so that the light emission direction of the LED bead faces the internal space of the equipment housing. The lens assembly 13 includes a lens body and a fixing structure connected to the lens body; the fixing structure is detachably connected to the mounting base to adjust the distance between the lens assembly 13 and the LED light source assembly 12 while ensuring that their optical axes are aligned.

[0037] In this embodiment, the LED light source assembly 12 includes a mounting base and at least one LED bead fixed to the mounting base. The mounting base can be a metal part or a flame-retardant engineering plastic part, and its shape can be disc-shaped, square plate-shaped, or a bracket structure with reinforcing ribs, depending on the structural design of the top mounting part of the equipment housing body 11. The mounting base is fixedly connected to the top mounting part of the equipment housing body 11 by means of screw fixing, snap locking, or welding, so that the position of the mounting base on the equipment housing body 11 is stable and reliable.

[0038] Here, LED beads are mounted on the lower surface or middle structure of the mounting base by means of surface mounting, soldering, or screw pressing. The light-emitting surface of the LED beads faces the internal space of the equipment box, thereby forming a downward or obliquely downward beam of light inside the equipment box. Depending on the size of the equipment box and the lighting requirements, the LED light source assembly 12 can contain a single LED bead, or multiple LED beads arranged in a ring, line, or matrix to obtain a more uniform or higher intensity lighting effect.

[0039] Here, the lens assembly 13 includes a lens body and a fixing structure connected to the lens body. The lens body is preferably made of a transparent material, and its curved surface or refractive structure is used to refract and converge light from the LED light source assembly 12. The fixing structure can be a ring retainer, bracket, connecting sleeve, or threaded mounting frame, etc., with one end fixedly connected to the lens body and the other end facing the mounting base. The fixing structure and the mounting base are detachably connected, for example, by threaded engagement, snap-fit ​​engagement, or screw fastening, allowing the lens assembly 13 to be easily removed from or reassembled from the LED light source assembly 12.

[0040] Thus, through the aforementioned detachable connection structure, while ensuring that the optical axes of the lens assembly 13 and the LED light source assembly 12 are aligned, the distance between the lens assembly 13 and the LED light source assembly 12 can be adjusted along the optical axis direction.

[0041] It should be noted that during actual assembly or debugging, the operator can fine-tune the distance between the lens assembly 13 and the LED light source assembly 12 according to the installation position of the passive Bluetooth tag 14, the size of the device box body 11, and the light intensity required for the tag to work, so as to change the divergence angle and spot size of the emitted beam, thereby obtaining a suitable spot range and light intensity distribution at the location of the passive Bluetooth tag 14, and further improving the adaptability of the system under different device box specifications and different installation scenarios.

[0042] As another possible implementation, the device housing 11 has a mounting surface inside for mounting a passive Bluetooth tag 14; the mounting surface is located below the optical axis of the lens assembly 13, and the distance between the mounting surface and the lens assembly 13 is less than the preset maximum transmission distance, so as to reduce diffusion loss during light transmission.

[0043] In this embodiment, the device housing 11 has an internal mounting surface for installing the passive Bluetooth tag 14. This mounting surface can be a flat area formed on the inner wall of the housing, such as a partial planar structure formed on the side wall or bottom plate of the housing. Alternatively, an independent mounting plate can be added to the inner wall of the housing by welding or screw fixing to provide a stable fixing reference for the passive Bluetooth tag 14. The passive Bluetooth tag 14 is fixed to the mounting surface by screws, clips, or adhesives, so that the position and orientation of the passive Bluetooth tag 14 inside the device housing 11 remain constant, avoiding tag displacement due to vibration or impact that would affect the light energy collection effect.

[0044] Preferably, the mounting surface is positioned below the optical axis of the lens assembly 13, and the distance between the mounting surface and the lens assembly 13 along the optical axis is less than a preset maximum transmission distance. The maximum transmission distance can be predetermined based on the luminous power of the LED light source assembly 12, the refractive parameters of the lens assembly 13, and the minimum operating light intensity threshold of the passive Bluetooth tag 14. When the actual distance between the mounting surface and the lens assembly 13 does not exceed this maximum transmission distance, the light rays converged by the lens assembly 13 can still form a light spot intensity that meets the working requirements in the light energy collection area of ​​the passive Bluetooth tag 14 after being transmitted through the air medium.

[0045] In this way, by arranging the mounting surface below the optical axis of the lens assembly 13 and controlling the distance between them to be less than the preset maximum transmission distance, the diffusion loss of light during transmission can be effectively reduced, and the light intensity per unit area reaching the passive Bluetooth tag 14 can be increased, thereby ensuring that the passive Bluetooth tag 14 obtains a stable and reliable light energy supply inside the device box.

[0046] As another possible implementation, the device housing 11 has multiple passive Bluetooth tag mounting positions inside; a passive Bluetooth tag 14 can be installed in each passive Bluetooth tag mounting position, and the multiple passive Bluetooth tags 14 are used to monitor environmental parameters at different locations inside the device housing; the arrangement of the LED light source assembly 12 and the lens assembly 13 ensures that the light energy collection area of ​​each passive Bluetooth tag 14 is within the light emission coverage area of ​​the lens assembly 13.

[0047] In a further embodiment, the device housing 11 has multiple passive Bluetooth tag mounting positions inside, each used to fix a passive Bluetooth tag 14. These multiple passive Bluetooth tag mounting positions can be distributed on different inner wall positions of the device housing 11, for example, at different heights on the bottom, side walls, or internal supports of the housing, to correspond to different areas, different device concentration areas, or different heat dissipation channels inside the housing.

[0048] Here, the passive Bluetooth tags 14 are installed in their respective mounting positions using screws, snap-fit ​​fasteners, or adhesive bonding, thus forming multiple interconnected monitoring points inside the device housing 11. Each passive Bluetooth tag 14 is equipped with a corresponding sensor to collect environmental parameters at its location, such as temperature, humidity, or vibration. Multiple passive Bluetooth tags 14 monitor environmental parameters at different locations inside the device housing, enabling more precise and comprehensive spatial distribution data collection of the environmental conditions within the entire device housing.

[0049] Correspondingly, in order to ensure that all of the above-mentioned passive Bluetooth tags 14 can obtain sufficient light energy, the arrangement of the LED light source assembly 12 and the lens assembly 13 is uniformly designed so that the beam coverage area formed by the light emitted by the lens assembly 13 matches the light energy collection area of ​​each passive Bluetooth tag 14.

[0050] Specifically, the LED light source assembly 12 and the lens assembly 13 are preferably arranged at the top of the device housing 11 or near the center of the housing. By selecting appropriate lens refraction parameters and installation height, the light beam emitted by the lens assembly 13 forms a certain opening angle illumination coverage area inside the device housing. This illumination coverage area can cover the space where each passive Bluetooth tag is installed, so that the light energy collection area of ​​each passive Bluetooth tag 14 installed in these installation positions is within the light emission coverage area of ​​the lens assembly 13.

[0051] In this way, with the above structural arrangement, it is possible to provide the required light energy to multiple spatially distributed passive Bluetooth tags 14 at the same time, under the premise of setting only one set of LED light source component 12 and lens component 13, so as to realize multi-point environmental monitoring and unified light energy supply inside the equipment box.

[0052] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a passive Bluetooth tag provided in this embodiment.

[0053] like Figure 2 As shown in the figure, the passive Bluetooth tag 14 provided in this embodiment includes: tag housing 141, light energy collection unit 142, energy management circuit board 143, Bluetooth communication circuit board 144, and sensor device 145.

[0054] Specifically, the light energy harvesting unit 142 is disposed inside the tag housing 141, and the light-receiving surface of the light energy harvesting unit 142 forms a light energy harvesting area. The energy management circuit board 143 is electrically connected to the light energy harvesting unit 142, and the Bluetooth communication circuit board 144 is electrically connected to the energy management circuit board 143. The sensor 145 is mounted on the tag housing 141 and electrically connected to the Bluetooth communication circuit board 144 to transmit the collected environmental parameters to the Bluetooth base station via Bluetooth signals.

[0055] In specific implementations, the tag housing 141 is used to house and protect the various electronic components inside the passive Bluetooth tag 14. The tag housing 141 is preferably made of flame-retardant engineering plastic or other materials with certain mechanical strength and insulation properties. It can be a split structure with the front and rear shells fastened together or locked with screws, or it can be a one-piece molded housing structure. The housing has reserved mounting positions and limiting structures for installing the light energy harvesting unit 142, the energy management circuit board 143, the Bluetooth communication circuit board 144, and the sensor device 145.

[0056] For example, an opening or thin-walled area may be formed on the front of the tag housing 141 to allow the light-receiving surface of the light energy harvesting unit 142 to face the external light source; mounting steps, columnar supports or studs may be provided on the inner side of the housing to fix the energy management circuit board 143 and the Bluetooth communication circuit board 144.

[0057] Here, the light-collecting unit 142 is disposed inside the label housing 141, with its light-receiving surface facing the outside of the label housing 141, preferably corresponding to the front opening area of ​​the label housing 141. The light-collecting unit 142 can be one or more photovoltaic collection components, such as small photovoltaic cells or photoelectric conversion modules, with one side of its flat surface serving as the light-receiving surface, forming the aforementioned light-collecting area. When light concentrated by the LED light source assembly 12 and the lens assembly 13 shines onto the light-receiving surface of the light-collecting unit 142, the light-collecting unit 142 converts the light energy into electrical energy and connects it electrically to the energy management circuit board 143 via wires, solder pads, or plug-in connectors.

[0058] Here, the energy management circuit board 143 is disposed inside the tag housing 141, preferably in a region close to the light energy harvesting unit 142 to shorten the electrical connection path. The energy management circuit board 143 is equipped with power conditioning circuitry for managing the electrical energy output from the light energy harvesting unit 142, such as voltage conversion, voltage regulation, energy storage, and power supply control. In specific implementations, the energy management circuit board 143 may include rectifier and filter circuits, buck-boost converter circuits, and energy storage components (such as capacitors or supercapacitors) to provide a relatively stable power supply to the Bluetooth communication circuit board 144 even when external light intensity fluctuates. The light energy harvesting unit 142 is electrically connected to the energy management circuit board 143 via conductive lines, realizing the input path from light energy to electrical energy.

[0059] Here, the Bluetooth communication circuit board 144 is also located inside the tag housing 141 and is electrically connected to the energy management circuit board 143. The Bluetooth communication circuit board 144 integrates radio frequency circuitry for Bluetooth communication and control circuitry for controlling data acquisition and transmission, such as a Bluetooth communication chip, processing unit, necessary power management interface circuitry, and storage components. The energy management circuit board 143 provides operating power to the Bluetooth communication circuit board 144. After obtaining a stable power supply, the Bluetooth communication circuit board 144 can process the data collected by the sensor device 145 according to a preset communication protocol and transmit it externally via Bluetooth.

[0060] Here, sensor 145 is mounted on tag housing 141 and electrically connected to Bluetooth communication circuit board 144. Sensor 145 can be a single sensor or a combination of multiple sensors, such as one or more of a temperature sensor, humidity sensor, barometric pressure sensor, or accelerometer. Depending on the data acquisition requirements, sensor 145 can be directly mounted on Bluetooth communication circuit board 144, or extended via leads to a mounting position near the outer surface of the housing, such as in a thin-walled area or opening on the side of tag housing 141, to more accurately sense the real environmental parameters inside the device housing. Sensor 145 is electrically connected to the signal input and power supply terminals on Bluetooth communication circuit board 144 via soldering or plug-in connection to achieve power supply and signal transmission.

[0061] In this embodiment, the light-collecting area formed by the light-receiving surface of the light-collecting unit 142 faces outwards, receiving light concentrated by the LED light source assembly 12 and lens assembly 13 inside the device box through the opening or light-transmitting area of ​​the tag housing 141. After the light-collecting unit 142 converts the received light energy into electrical energy, it is conditioned and stored by the energy management circuit board 143, thereby providing operating power to the Bluetooth communication circuit board 144 and the sensor device 145 connected thereon. After receiving power, the sensor device 145 collects environmental parameters inside the device box and outputs the collection results to the Bluetooth communication circuit board 144. The Bluetooth communication circuit board 144 processes the collected environmental parameters and sends them to the external Bluetooth base station in the form of Bluetooth signals, thus completing the power supply and data upload functions of the passive Bluetooth tag 14.

[0062] It should be noted that the energy management circuit board 143 and the Bluetooth communication circuit board 144 can be selected from existing circuit board structures that can achieve the corresponding functions, and no specific restrictions are imposed here.

[0063] As one possible implementation, the passive Bluetooth tag 14 is also provided with an antenna unit electrically connected to the Bluetooth communication circuit board 144; the antenna unit is located on the outside of the tag housing 141 or close to the inner wall of the housing to optimize the Bluetooth signal radiation within the device housing 11.

[0064] In this embodiment, the passive Bluetooth tag 14 is also provided with an antenna unit electrically connected to the Bluetooth communication circuit board 144 for radiating and receiving Bluetooth radio frequency signals. The antenna unit can be a printed antenna on the Bluetooth communication circuit board 144, an FPC antenna on a flexible circuit board, or an independent metal vibrator antenna. The antenna unit is electrically connected to the radio frequency output port on the Bluetooth communication circuit board 144 via pads, connectors, or wire bonding, so that the radio frequency signal output by the Bluetooth communication circuit board 144 can be radiated outward through the antenna unit, while simultaneously coupling external Bluetooth response signals or control signals back to the Bluetooth communication circuit board 144.

[0065] Preferably, the antenna element is disposed on the outer side of the tag housing 141 or close to the inner wall of the housing. For example, when using an FPC or independent metal antenna, it can be arranged on the outer surface of the tag housing 141 or on the inner wall of the housing near the outer surface, so that the dielectric layer between the antenna element and the outer surface of the housing is as thin as possible, thereby reducing the attenuation and reflection of radio frequency signals by the housing material; when using a printed antenna, the antenna area can be arranged on the Bluetooth communication circuit board 144 near the edge of the housing, and the corresponding area of ​​the tag housing 141 can be thinned, windowed, or made of a low dielectric constant material to improve the radiation efficiency of the antenna element.

[0066] In this way, by placing the antenna unit on the outside of the tag housing 141 or close to the inner wall of the housing, the radiation directionality and effective coverage of the Bluetooth signal can be optimized under the constraints of the complex electromagnetic environment and metal shielding structure inside the device housing 11, thereby improving the reliability and stability of communication between the passive Bluetooth tag 14 and the external Bluetooth base station.

[0067] This application provides a passive Bluetooth tag system for use in a device enclosure. By installing an LED light source assembly on the top of the enclosure and a coaxial lens assembly on its light-emitting side, the system constrains and concentrates the emitted light, creating a light intensity distribution in the area where the passive Bluetooth tag is located that exceeds the tag's activation threshold. This significantly improves the light intensity per unit area reaching the tag and the light energy utilization rate while maintaining low LED power, thereby achieving stable power supply to the passive Bluetooth tag. It enables long-life, maintenance-free wireless data acquisition and uploading of parameters such as temperature and humidity from multiple monitoring points inside the enclosure without wiring or battery replacement, balancing system security, reliability, and maintenance costs.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A passive Bluetooth tag system for use in equipment enclosures, characterized in that, include: The equipment housing body has a top mounting portion for mounting lighting components; An LED light source assembly is fixedly installed on the top mounting part and is used to emit illumination light into the interior of the equipment housing. A lens assembly is disposed on the light-emitting side of the LED light source assembly and arranged coaxially with the optical axis of the LED light source assembly; A passive Bluetooth tag is disposed inside the device housing and within the optical axis coverage area of ​​the lens assembly; The lens assembly is a light-collecting structure used to compress the light emission angle of the LED light source assembly. The light-incident surface of the lens assembly faces the LED light source assembly, and the light-emitting surface faces the passive Bluetooth tag. The passive Bluetooth tag is provided with a light energy collection area, which is located within the light spot formed by the light emitted from the lens assembly, so as to convert the light energy collected by the lens assembly into electrical energy to power the passive Bluetooth tag.

2. The passive Bluetooth tag system applied to a device box according to claim 1, characterized in that: The LED light source assembly includes a mounting base and at least one LED bead fixed on the mounting base; The mounting base is fixedly connected to the top mounting part of the equipment box body, so that the light emission direction of the LED lamp beads is facing the internal space of the equipment box.

3. The passive Bluetooth tag system applied to a device box according to claim 2, characterized in that: The lens assembly includes a lens body and a fixing structure connected to the lens body; The fixing structure is detachably connected to the mounting base to adjust the distance between the lens assembly and the LED light source assembly while ensuring that their optical axes are aligned.

4. The passive Bluetooth tag system applied to a device box according to claim 3, characterized in that: The lens body is one of a convex lens, a Fresnel lens, or a multi-segment combination lens; The refractive structure of the lens body is used to reduce the divergence angle of the original light emission of the LED lamp bead, so that the light spot area after the light is emitted by the lens assembly is smaller than the light spot area formed by the LED light source assembly emitting light directly at the same distance without passing through the lens.

5. The passive Bluetooth tag system applied to a device box according to claim 1, characterized in that, The passive Bluetooth tag includes: Label housing; A light energy collection unit is disposed inside the label housing, and the light-receiving surface of the light energy collection unit forms the light energy collection area; The energy management circuit board is electrically connected to the light energy harvesting unit; A Bluetooth communication circuit board electrically connected to the energy management circuit board; The light energy acquisition unit, energy management circuit board, and Bluetooth communication circuit board are all integrated into the tag housing, forming an integrated passive Bluetooth tag structure.

6. The passive Bluetooth tag system applied to a device box according to claim 5, characterized in that: The passive Bluetooth tag is also provided with an antenna unit that is electrically connected to the Bluetooth communication circuit board. The antenna unit is located on the outside of the tag housing or close to the inner wall of the housing to optimize Bluetooth signal radiation within the device housing.

7. The passive Bluetooth tag system applied to a device box according to claim 5, characterized in that: The passive Bluetooth tag is equipped with at least one sensor, which includes one or more of a temperature sensor, a humidity sensor, a barometric pressure sensor, and an accelerometer. The sensor is mounted on the tag housing and electrically connected to the Bluetooth communication circuit board to transmit the collected environmental parameters to the Bluetooth base station via Bluetooth signals.

8. The passive Bluetooth tag system applied to a device box according to claim 5, characterized in that: The minimum operating light intensity threshold of the light energy harvesting unit is greater than 200 lux; The lens assembly and the LED light source assembly work together to ensure that the light intensity at the light energy collection area where the passive Bluetooth tag is located is not lower than the working light intensity threshold.

9. The passive Bluetooth tag system applied to a device enclosure according to claim 1, characterized in that: The device housing has an internal mounting surface for installing the passive Bluetooth tag. The mounting surface is located below the optical axis of the lens assembly, and the distance between it and the lens assembly is less than the preset maximum transmission distance, so as to reduce diffusion loss during light transmission.

10. The passive Bluetooth tag system applied to a device box according to claim 1, characterized in that: The device housing has multiple passive Bluetooth tag mounting positions inside. One passive Bluetooth tag can be installed at each of the passive Bluetooth tag mounting positions, and multiple passive Bluetooth tags are used to monitor environmental parameters at different locations inside the device box. The LED light source assembly and the lens assembly are positioned such that the light energy collection area of ​​each passive Bluetooth tag is within the light emission coverage area of ​​the lens assembly.

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