A micro-positioner based on a bluetooth chip

Abstract

The utility model provides a kind of micro-positioner based on bluetooth chip, including communication module, power module and sensor module;Wherein the communication module includes bluetooth antenna and bluetooth chip, the bluetooth antenna and the bluetooth chip are integrated on PCB board, the bluetooth antenna is connected with the bluetooth chip, for realizing wireless data transmission;The sensor module includes acceleration sensor, the acceleration sensor carries out information interaction with the bluetooth chip by SPI interface.The utility model realizes the miniaturization of positioner by highly integrated design, with low power consumption, high stability and anti-fake function simultaneously, applicable to article tracking, indoor positioning and other scenes, solve the problem of traditional positioner large size, high power consumption, single function.

Description

Technical Field

[0001] This utility model relates to the field of locator manufacturing, and specifically to a miniature locator based on a Bluetooth chip. Background Technology

[0002] With the rapid development of IoT technology, locators are increasingly used in areas such as item tracking, indoor navigation, and asset management. Traditional locators typically rely on GPS or cellular network technology, which, while providing relatively accurate location information, are bulky, consume a lot of power, and suffer from insufficient signal coverage in some indoor environments, leading to decreased positioning accuracy or even failure. Furthermore, traditional locators are limited in function, lacking additional features such as anti-counterfeiting and status indicators, making it difficult to meet users' demands for multifunctional, miniaturized, and low-power devices. Bluetooth technology, due to its low power consumption, low cost, and miniaturization, is gradually becoming the preferred solution for short-range positioning; however, existing Bluetooth locators still have many shortcomings in design and functionality.

[0003] Most Bluetooth trackers on the market currently employ a discrete design, with communication, sensor, and power modules loosely arranged. This makes it difficult to further reduce the device size, limiting its application in micro-devices. Furthermore, due to inadequate power management design, battery life is short, and frequent battery replacements increase operating costs. In addition, existing Bluetooth trackers also suffer from data transmission stability issues, especially in complex electromagnetic environments where signal interference can lead to communication interruptions or data loss. The lack of anti-counterfeiting features also makes the devices easy to counterfeit, affecting brand reputation and user safety.

[0004] Regarding sensors, traditional accelerometers typically communicate with the main control chip via an I2C interface, but their data transmission rate and stability are limited, making it difficult to meet the demands of high-precision positioning. While the SPI interface offers higher speeds, it is rarely used in Bluetooth locators and lacks optimized hardware design. Voltage fluctuations in the power module have also been insufficiently addressed, affecting the operational stability of both the sensor and communication modules. Furthermore, existing locators lack intuitive status indicators, preventing users from quickly understanding the device's operating status and resulting in a poor user experience.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The purpose of this invention is to provide a miniature locator based on a Bluetooth chip. Through a highly integrated PCB design, the Bluetooth antenna, Bluetooth chip, and sensor module are compactly arranged, significantly reducing the device size. Simultaneously, the use of a CR2032 button battery and filter capacitor optimizes power management and extends battery life. The Bluetooth antenna employs a microstrip line or inverted-F structure, improving signal transmission stability and anti-interference capabilities. The accelerometer interacts with the Bluetooth chip via an SPI interface, enhancing data transmission rate and accuracy. The addition of an HW-ID anti-counterfeiting module and LED indicator enhances device security and user experience. This invention effectively solves the problems of large size, high power consumption, and limited functionality in traditional locators, providing a new technical solution for miniaturized, low-power, and multifunctional locator design.

[0007] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0008] A miniature locator based on a Bluetooth chip includes a communication module, a power module, and a sensor module. The communication module includes a Bluetooth antenna and a Bluetooth chip, both integrated on a PCB board. The Bluetooth antenna is connected to the Bluetooth chip for wireless data transmission. The sensor module includes an accelerometer, which interacts with the Bluetooth chip via an SPI interface.

[0009] Preferably, as a further feasible option, the Bluetooth antenna is a PCB-mounted antenna, employing a microstrip line structure or an inverted F antenna structure.

[0010] Preferably, as a further feasible option, the power module uses a CR2032 button battery and is electrically connected to the communication module and the sensor module.

[0011] Preferably, as a further feasible option, the power supply circuit of the power module is equipped with a filter capacitor to ensure voltage stability.

[0012] Preferably, as a further feasible option, the SPI interface adopts a four-wire connection, including SCK, MISO, MOSI and CS signal lines.

[0013] Preferably, as a further feasible solution, the PCB board has a reserved HW-ID circuit interface, and the HW-ID anti-counterfeiting module is connected to the Bluetooth chip through the HW-ID circuit interface to achieve anti-counterfeiting authentication.

[0014] Preferably, as a further feasible option, the HW-ID anti-counterfeiting module is electrically connected to the power module.

[0015] Preferably, as a further feasible solution, an LED indicator is also included, which is connected to the Bluetooth chip via a GPIO interface to provide status indication.

[0016] Preferably, as a further feasible option, the LED indicator is a surface-mount LED and is soldered to the edge of the PCB board.

[0017] This utility model's miniature locator achieves precise positioning in complex indoor and outdoor environments through highly integrated hardware design and intelligent software algorithms. Its workflow is a closed-loop system with multiple modules working together, covering the entire chain from environmental perception and data processing to wireless communication. Each component plays an irreplaceable role in the positioning process.

[0018] The entire process of the locator from startup to completion of positioning is as follows: The core function of the locator relies on the low power consumption characteristics of Bluetooth technology and the dynamic detection capability of the accelerometer. When the device is in standby mode, the entire system operates with minimal power consumption, retaining only the basic detection function of the accelerometer. At this time, the Bluetooth chip is in deep sleep mode to save power to the maximum extent. The power module provides stable power support to the system through a CR2032 button battery, and the filter capacitor in the power supply circuit ensures that voltage fluctuations will not affect the stability of the sensor and communication module. This design enables the device to maintain extremely low power consumption in a stationary state, laying the foundation for long-term battery life; when accelerating... When the sensor detects movement of the device, such as a key being picked up or an object being moved, the sensor immediately transmits the motion signal to the Bluetooth chip via a high-speed SPI interface. The SPI interface uses a four-wire connection (SCK, MISO, MOSI, and CS), and its high transmission rate ensures real-time data interaction, avoiding the latency issues that may occur with traditional I2C interfaces. Subsequently, the Bluetooth chip is awakened after receiving the motion signal and immediately starts the Bluetooth broadcast function, transmitting wireless signals outward through the Bluetooth antenna integrated on the PCB board. The antenna adopts a microstrip line or inverted F structure design. This onboard antenna not only saves space but also maintains stable signal transmission quality in complex electromagnetic environments.

[0019] The Bluetooth signal broadcast includes the device's unique identifier and motion data collected by the accelerometer. External receiving devices (such as smartphones or dedicated Bluetooth gateways) scan these signals to obtain the device's broadcast information. The core principle of positioning is based on the measurement of Bluetooth signal strength (RSSI). The receiving device estimates the distance to the locator by analyzing the signal attenuation. When multiple Bluetooth receiving nodes exist in the environment, the system can use a triangulation algorithm to calculate the locator's precise location by comparing the differences in signal strength received by different nodes. This process is particularly important in indoor environments because traditional GPS signals attenuate significantly indoors, while Bluetooth signals can penetrate building structures and provide reliable positioning data. Accelerometer data also plays a crucial role at this stage. The motion direction and speed information it provides can be fused with the Bluetooth positioning results to further correct the position estimation error.

[0020] Furthermore, in this locator, power management is crucial throughout the entire positioning process and is key to the long-term stable operation of the device. The high energy density of the CR2032 button battery and the voltage regulation design of the filter capacitor jointly ensure the power supply of the system when frequently switching working states. At the same time, the low power consumption of the Bluetooth chip allows the device to maintain low power consumption even in active broadcast mode, while the intelligent wake-up mechanism of the accelerometer sensor avoids unnecessary energy waste. In addition, the HW-ID circuit interface reserved on the PCB board provides hardware support for anti-counterfeiting authentication. The HW-ID module generates a unique device identifier through an encryption algorithm and attaches this information in the Bluetooth broadcast. After receiving the signal, external devices must verify the authenticity of the identifier before obtaining positioning data. This mechanism effectively prevents the device from being counterfeited or the data from being tampered with, improving the system's security. The LED indicator serves as a window for human-computer interaction, conveying the device status to the user through different flashing patterns. For example, rapid flashing may indicate that the device is actively locating, slow flashing indicates that it is in low power mode, and constant light may indicate low battery.

[0021] The unique design of the accelerometer in this invention is key to the high-precision positioning of the locator. Its internal fixed and moving block structure allows the chip to accurately detect the device's direction of movement and displacement. When the device moves, the displacement of the moving block relative to the fixed block is captured by the chip in real time and transmitted to the Bluetooth chip via the SPI interface. This data is not only used to trigger the positioning process but can also be fused with Bluetooth signal strength data to further correct the positioning results, improving the continuity and accuracy of tracking. For example, in complex indoor environments, relying solely on Bluetooth signal strength may lead to positioning errors, while combining motion data from the accelerometer allows the system to dynamically adjust the positioning results, significantly improving accuracy.

[0022] This invention highly integrates Bluetooth communication, motion detection, power management, and anti-counterfeiting authentication functions into a miniaturized hardware platform, and achieves collaborative operation through optimized software algorithms. The compact design of the Bluetooth antenna and chip reduces the device size, while the SPI interface and filter capacitor improve the stability of data transmission and power supply. The HW-ID module and LED indicators enhance security and user experience. This system-level design approach allows this locator to not only surpass traditional solutions in performance but also achieve significant advantages in cost, power consumption, and size.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] (1) This utility model provides a miniature locator based on a Bluetooth chip. Through a highly integrated PCB design, the Bluetooth antenna, Bluetooth chip, and sensor module are compactly arranged, significantly reducing the size of the device. At the same time, the use of CR2032 button battery and filter capacitor design optimizes power management and extends battery life. The Bluetooth antenna adopts a microstrip line or inverted F structure, which improves the stability of signal transmission and anti-interference ability. The accelerometer interacts with the Bluetooth chip through the SPI interface, improving the data transmission rate and accuracy. The addition of HW-ID anti-counterfeiting module and LED indicator enhances the security of the device and the user experience. This utility model effectively solves the problems of large size, high power consumption, and single function of traditional locators, and provides a new technical solution for the design of miniaturized, low-power, and multifunctional locators. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a miniature locator according to the present invention.

[0026] The markings in the attached diagram represent: 1. Bluetooth chip; 2. Accelerometer; 3. Power module; 4. HW-ID anti-counterfeiting module; 5. Bluetooth antenna; 6. LED indicator. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of this utility model, but not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "side wall", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] To more clearly illustrate the technical solution of this utility model, the following description is provided in the form of specific embodiments.

[0030] Example 1

[0031] See Figure 1 This invention relates to a miniature locator based on a Bluetooth chip, comprising a communication module, a power module, and a sensor module. The communication module includes a Bluetooth antenna 5 and a Bluetooth chip 1, which are connected to achieve wireless data transmission. Both the Bluetooth antenna 5 and the Bluetooth chip are integrated on a PCB board. The Bluetooth chip 1 acts as the main control unit, processing data from the accelerometer and broadcasting device information via the Bluetooth protocol. The Bluetooth antenna 5 is a PCB-mounted antenna with a microstrip or inverted-F structure, optimizing signal transmission efficiency and ensuring stable signal transmission even in complex environments such as indoors. Furthermore, the PCB board has a reserved HW-ID circuit interface. The HW-ID anti-counterfeiting module 4 is connected to the Bluetooth chip 1 through this interface and is electrically connected to the power module. This allows the device to attach an encrypted unique identifier during its first broadcast, requiring external devices to verify this identifier before obtaining location data; subsequent verification of the device is unnecessary.

[0032] The sensor module includes an accelerometer 2, which interacts with the Bluetooth chip 1 via an SPI interface. The accelerometer 2 detects the device's motion state, assisting in optimizing positioning accuracy and power management. Positioning is triggered by motion; when the accelerometer 2 detects device movement, it sends a signal to the Bluetooth chip 1 via the SPI interface to wake up the Bluetooth module and activate the broadcast function, reducing unnecessary power consumption when stationary. The SPI interface uses a four-wire connection, including SCK, MISO, MOSI, and CS signal lines. Furthermore, combining acceleration data with Bluetooth signals allows for dynamic correction of positioning results, thereby improving tracking continuity.

[0033] The power module 3 uses a CR2032 button battery and is electrically connected to both the communication module and the sensor module. The power supply circuit is equipped with a filter capacitor to provide stable and long-lasting power support for the entire system, ensuring long-term reliable operation. The CR2032 battery has a capacity of 225mAh, which, together with the sleep mode of the Bluetooth chip and the sensor, can achieve a battery life of more than one year. At the same time, the filter capacitor inside can eliminate power fluctuations and prevent data errors or communication interruptions caused by unstable voltage in the sensor and Bluetooth chip.

[0034] The locator of this utility model also includes an LED indicator 6, which is connected to the Bluetooth chip 1 via a GPIO interface for status indication; Figure 1 The 32.768KHz and 32MHz are two crystal oscillators, which are the basic peripheral configurations for the Bluetooth chip to work, while Debug is used for R&D debugging.

[0035] The specific working process of the positioner of this utility model is as follows:

[0036] The communication module is the core of the locator, comprising Bluetooth antenna 5 and Bluetooth chip 1, both integrated on the PCB board. Bluetooth chip 1 acts as the main control unit, responsible for processing sensor data and broadcasting device information via the Bluetooth protocol. When the locator is stationary, Bluetooth chip 1 enters deep sleep mode to reduce power consumption. Once the sensor module detects movement, Bluetooth chip 1 is awakened and initiates its broadcast function, transmitting a Bluetooth signal containing the device's unique identifier and movement data. External receiving devices (such as smartphones or Bluetooth gateways) scan these signals and analyze the signal strength index (RSSI), using a triangulation algorithm to calculate the locator's precise location. This design enables the locator to achieve stable and reliable positioning in both indoor and outdoor environments.

[0037] The core of the sensor module is the accelerometer 2, which operates based on two internal blocks: a fixed block and a moving block. When the locator moves or tilts, the moving block displaces relative to the fixed block. The Bluetooth chip 1 detects this displacement to determine the device's motion state and direction. The accelerometer 2 interacts with the Bluetooth chip 1 via a high-speed SPI interface. The SPI interface uses a four-wire connection (SCK, MISO, MOSI, and CS) to ensure real-time and stable data transmission. This design avoids the latency issues that may occur with traditional I2C interfaces, significantly improving positioning accuracy. Furthermore, the motion detection function of the accelerometer 2 also optimizes power consumption. When the device is stationary, the sensor operates in a low-power mode; once motion is detected, the sensor immediately wakes up the Bluetooth chip and initiates the positioning process, thereby reducing unnecessary power consumption.

[0038] Power module 3 provides stable power support for the entire system, using a CR2032 button cell battery. Its high energy density and long lifespan allow the positioner to operate for more than a year after a single battery replacement. The power supply circuit of power module 3 also includes a filter capacitor to eliminate voltage fluctuations and ensure the stable operation of the sensor and communication module.

[0039] In addition, the locator integrates an HW-ID anti-counterfeiting module 4 and an LED indicator 6, further enhancing the device's functionality and user experience. The HW-ID module generates a unique device identifier using an encryption algorithm and includes this information in the Bluetooth broadcast. External devices must verify the authenticity of the identifier before obtaining location data, effectively preventing device counterfeiting and data tampering. The LED indicator 6 is connected to the Bluetooth chip 1 via a GPIO interface, conveying the device status to the user through different flashing patterns. For example, rapid flashing indicates positioning, slow flashing indicates low-power mode, and constant light indicates low battery. This intuitive status indication function greatly enhances the user experience.

[0040] In the specific workflow, when the device is stationary, the system operates with minimal power consumption, retaining only the basic detection function of the accelerometer 2. Once motion is detected, the accelerometer 2 transmits a signal to the Bluetooth chip 1 via the SPI interface, waking up the Bluetooth module and initiating the broadcast function. The Bluetooth antenna 5 transmits signals outward, and the external receiving device calculates the device's position by analyzing the signal strength and motion data. The power module 3 provides stable power support throughout the process, and the filter capacitor ensures that voltage fluctuations do not affect system stability. The HW-ID module 4 and LED indicator 6 further enhance the system functionality from the perspectives of safety and user experience, respectively.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A miniature locator based on a Bluetooth chip, characterized in that, It includes a communication module, a power module, and a sensor module; wherein the communication module includes a Bluetooth antenna and a Bluetooth chip, both of which are integrated on a PCB board, and the Bluetooth antenna is connected to the Bluetooth chip for wireless data transmission; the sensor module includes an accelerometer, which interacts with the Bluetooth chip via an SPI interface.

2. The miniature locator based on a Bluetooth chip according to claim 1, characterized in that, The Bluetooth antenna is a PCB-mounted antenna, employing a microstrip line structure or an inverted-F antenna structure.

3. The miniature locator based on a Bluetooth chip according to claim 1, characterized in that, The power module uses a CR2032 button battery and is electrically connected to the communication module and the sensor module.

4. The miniature locator based on a Bluetooth chip according to claim 3, characterized in that, The power supply circuit of the power module is equipped with a filter capacitor to ensure voltage stability.

5. The miniature locator based on a Bluetooth chip according to claim 1, characterized in that, The SPI interface uses a four-wire connection, including SCK, MISO, MOSI and CS signal lines.

6. The miniature locator based on a Bluetooth chip according to claim 1, characterized in that, The PCB board has a reserved HW-ID circuit interface, and the HW-ID anti-counterfeiting module is connected to the Bluetooth chip through the HW-ID circuit interface to achieve anti-counterfeiting authentication.

7. The miniature locator based on a Bluetooth chip according to claim 6, characterized in that, The HW-ID anti-counterfeiting module is electrically connected to the power module.

8. The miniature locator based on a Bluetooth chip according to claim 1, characterized in that, It also includes an LED indicator, which is connected to the Bluetooth chip via a GPIO interface to provide status indication.

9. The miniature locator based on a Bluetooth chip according to claim 8, characterized in that, The LED indicator uses surface-mount LEDs and is soldered to the edge of the PCB board.

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