A low-power sensor based on bluetooth BLE

Abstract

The utility model relates to a kind of low-power sensor based on Bluetooth BLE, comprising: bluetooth module, the bluetooth module is low-power embedded bluetooth module;Temperature and humidity sensor, the temperature and humidity sensor is connected in the bluetooth module;Solar power module, the solar power module is connected in the bluetooth module and temperature and humidity sensor.No additional configuration single-chip microcomputer is carried out data acquisition and wireless transmission, and then additional power supply is configured for single-chip microcomputer, and bluetooth module uses low-power embedded bluetooth module, further reduce power consumption, can realize temperature and humidity sensor in the case of low power consumption data acquisition and wireless transmission.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and specifically to a low-power sensor based on Bluetooth BLE. Background Technology

[0002] A temperature and humidity sensor is a sensor device equipped with humidity-sensitive and temperature-sensitive elements, used to measure temperature and humidity. Due to their small size and stable performance, temperature and humidity sensors are widely used in various fields of production and daily life. They play a particularly important role in the field of intelligent irrigation.

[0003] Existing temperature and humidity sensors typically require a microcontroller to collect data before transmitting it wirelessly. This process necessitates a power supply module for the microcontroller, requiring not only a relatively heavy circuit but also additional power to the microcontroller, thus increasing the overall power consumption of the sensor. Utility Model Content

[0004] In view of the above problems, this application provides a low-power sensor based on Bluetooth BLE, which solves the problem of increased power consumption caused by the need to configure a microcontroller for data acquisition and transmission of existing temperature and humidity sensors.

[0005] To achieve the above objectives, the inventors provide a low-power sensor based on Bluetooth BLE, comprising:

[0006] Bluetooth module, wherein the Bluetooth module is a low-power embedded Bluetooth module;

[0007] A temperature and humidity sensor, which is connected to the Bluetooth module;

[0008] A solar power module, which is connected to the Bluetooth module and the temperature and humidity sensor.

[0009] In some embodiments, the solar power module includes:

[0010] A boost converter, the output of which is connected to a Bluetooth module and a temperature and humidity sensor, and the power input of which is equipped with an inductor L1;

[0011] A solar panel, which is used to convert solar energy into electrical energy; the power output terminal of the solar panel is connected to the power input terminal of the boost converter through a diode D1.

[0012] A battery, the output of which is connected to the power input of the boost converter.

[0013] In some embodiments, it also includes:

[0014] The battery voltage detection circuit consists of a voltage divider circuit composed of resistors R9 and R10. The input terminal of the battery voltage detection circuit is connected to the power output terminal of the battery, and the output terminal of the battery voltage detection circuit is connected to the Bluetooth module.

[0015] In some embodiments, it also includes:

[0016] A voltage detector, the power input terminal of which is connected to the power output terminal of the solar panel, and the power output terminal of which is connected to the power input terminal of the boost converter through diode D1.

[0017] In some embodiments, the solar panel is a low-light solar panel.

[0018] In some embodiments, the temperature and humidity sensor is a digital temperature and humidity sensor.

[0019] In some embodiments, it also includes:

[0020] Indicator light, which is connected to the Bluetooth module.

[0021] In some embodiments, it also includes:

[0022] A button, which is connected to the Bluetooth module.

[0023] Unlike existing technologies, the above technical solution provides power to the Bluetooth module and temperature and humidity sensor through a solar power module. The temperature and humidity sensor is directly connected to the Bluetooth module, which acts as the main controller, storing the data collected by the temperature and humidity sensor locally and reporting the data. This eliminates the need for an additional microcontroller for data acquisition and wireless transmission, thus eliminating the need for an additional power supply for the microcontroller. Furthermore, the Bluetooth module uses a low-power embedded Bluetooth module, further reducing power consumption and enabling the temperature and humidity sensor to perform data acquisition and wireless transmission with low power consumption.

[0024] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0025] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0026] In the accompanying drawings of the instruction manual:

[0027] Figure 1 This is a schematic diagram of a structure of a low-power sensor based on Bluetooth BLE as described in a specific embodiment.

[0028] Figure 2 This is a schematic diagram of another structure of the Bluetooth BLE-based low-power sensor described in a specific implementation.

[0029] Figure 3 A circuit diagram of the Bluetooth module described in a specific implementation;

[0030] Figure 4 A circuit diagram of the solar power module described in a specific embodiment;

[0031] Figure 5 This is a circuit diagram of the battery voltage detection circuit described in a specific embodiment;

[0032] Figure 6 A circuit diagram of the temperature and humidity sensor described in a specific embodiment;

[0033] Figure 7 A circuit diagram of the indicator light described in a specific embodiment;

[0034] Figure 8 This is a circuit diagram of one embodiment of the button.

[0035] The reference numerals used in the above figures are explained as follows:

[0036] 110. Bluetooth module

[0037] 120. Temperature and humidity sensor

[0038] 130. Solar power module. Detailed Implementation

[0039] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0040] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0041] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0042] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0043] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0044] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0045] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0046] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] Please see Figure 1-2 This embodiment provides a low-power sensor based on Bluetooth BLE, including:

[0049] Bluetooth module 110, wherein the Bluetooth module 110 is a low-power embedded Bluetooth module 110;

[0050] Temperature and humidity sensor 120, the temperature and humidity sensor 120 is connected to the Bluetooth module 110;

[0051] A solar power module 130 is connected to the Bluetooth module 110 and the temperature and humidity sensor 120.

[0052] The solar power module 130 provides power to the Bluetooth module 110 and the temperature and humidity sensor 120. The temperature and humidity sensor 120 is directly connected to the Bluetooth module 110. The Bluetooth module 110 acts as the master controller, storing the data collected by the temperature and humidity sensor 120 locally and reporting the data collected by the temperature and humidity sensor 120. No additional microcontroller is required for data acquisition and wireless transmission, and therefore no additional power supply is needed for the microcontroller. Furthermore, the Bluetooth module 110 is a low-power embedded Bluetooth module, which further reduces power consumption, enabling the temperature and humidity sensor 120 to perform data acquisition and wireless transmission under low power conditions.

[0053] Please see Figure 2-3 The Bluetooth module 110 uses the Tuya BTU module, a low-power embedded Bluetooth module developed by Tuya Smart. It mainly consists of a highly integrated Bluetooth chip, TLSR8250, and a small amount of peripheral circuitry, with a built-in Bluetooth network communication protocol stack and rich library functions. The BTU module uses an onboard PCB antenna with a gain of 1.08dBi. It operates at a frequency of 2.4GHz ISM band, using the Bluetooth LE 5.0 wireless standard. The TLSR8250's I / O ports are brought out to the module pins, enabling direct control of the temperature and humidity sensor 120. After entering sleep mode, the device wakes up every 1 second, then enters sleep mode again, achieving low power consumption. The Bluetooth module 110's standby power consumption in broadcast mode is 1.5V / 200uA 3dB transmit power. Users can adjust the transmit power via an app to reduce power consumption and extend battery life, depending on the operating distance. Another voltage detector U5 is configured on the reset pin of the Bluetooth module 110. The power input terminal of the other voltage detector U5 is connected to the power output terminal of the solar power module 130, and the power output terminal is connected to the reset pin of the Bluetooth module 110. This is to prevent the Bluetooth module 110 from restarting when the battery power in the solar power module 130 is low.

[0054] Please see Figure 4 In some embodiments, the solar power module 130 includes:

[0055] A boost converter U1, the output of which is connected to a Bluetooth module 110 and a temperature and humidity sensor 120, and the power input of which is provided with an inductor L1;

[0056] A solar panel, which is used to convert solar energy into electrical energy; the power output terminal of the solar panel is connected to the power input terminal of the boost converter through a diode D1.

[0057] A battery, the output of which is connected to the power input of the boost converter.

[0058] Solar panels convert solar energy into electrical energy, which, along with a battery, powers the Bluetooth module 110 and the temperature and humidity sensor 120. A boost converter boosts the voltage from the solar panel and the battery to obtain the voltage required by the Bluetooth module 110 and the temperature and humidity sensor 120, thus powering them. The battery can be a single AA battery. The boost converter U1 can start at low voltage, making it suitable for use with common AA batteries. It has a switching frequency of 1MHz, requires only a small inductor, has an internal MOSFET, and achieves an efficiency of over 85% at a 1.5V input, making it suitable for miniaturized product designs.

[0059] Please see Figure 4 In some embodiments, it also includes:

[0060] Voltage detector U4, the power input terminal of voltage detector U4 is connected to the power output terminal of solar panel, and the power output terminal of voltage detector U4 is connected to the power input terminal of boost converter through diode D1.

[0061] The voltage detector U4 has a power consumption of 0.9uA and an internal CMOS half-bridge structure. When the input voltage at pin 1 is greater than 1.3V, pins 2 and 1 of the voltage detector U4 are connected, and the output voltage is the input voltage of the voltage detector U4. When the input voltage at pin 1 is less than 1.235V, pins 2 and 3 of the voltage detector U4 are connected, and the output voltage is 0V.

[0062] When the solar panel output voltage is greater than 1.3V, it powers the temperature and humidity sensor and Bluetooth module via diode D1 and the battery, thus providing supplemental power to the product. Capacitors C6 and C11 are used to stabilize the solar panel output voltage; their values ​​must be matched to the solar panel.

[0063] In some embodiments, an energy storage capacitor is provided at the power output terminal of the solar panel to store the electrical energy generated by the solar panel, so that when the output voltage of the solar panel is lower than 1.3V, the electrical energy of the solar panel can be stored in the energy storage capacitor.

[0064] Please see Figure 5 In some embodiments, it also includes:

[0065] The battery voltage detection circuit is a voltage divider circuit composed of resistors R9 and R10. The input terminal of the battery voltage detection circuit is connected to the power output terminal of the battery, and the output terminal of the battery voltage detection circuit is connected to the Bluetooth module 110.

[0066] The battery voltage is monitored by a voltage divider circuit composed of resistors R9 and R10. When the battery voltage is too low, the Bluetooth module 110 can issue a warning signal to prompt relevant personnel to replace the battery.

[0067] In some embodiments, the solar panel is a low-light solar panel. Using a low-light solar panel, it can generate approximately 8.5uA of current under indoor low-light conditions of 200LX, sharing the energy output with a single AA battery, reducing battery consumption and the frequency of battery replacements. If the product is placed near a window where sunlight is more abundant, the solar panel can provide even more energy.

[0068] Please see Figure 6In some embodiments, the temperature and humidity sensor 120 is a digital temperature and humidity sensor. Compared to traditional analog devices, the temperature and humidity sensor 120 using digital chip devices occupies less PCB board area, has higher reliability, provides more accurate data, requires no additional calibration, and reduces manufacturing difficulty. Specifically, it employs the Swiss Sensirion SHTC3 digital temperature and humidity sensor, with a temperature accuracy of ±0.2℃ and a humidity accuracy of ±2%RH, and features built-in compensation to provide users with more accurate data.

[0069] Please see Figure 7 In some embodiments, it also includes:

[0070] Indicator LED1 is connected to the Bluetooth module 110.

[0071] The LED1 indicator light is connected to the Bluetooth module 110 to indicate the working status of the entire product.

[0072] Please see Figure 8 In some embodiments, it also includes:

[0073] A button KEY is connected to the Bluetooth module 110.

[0074] Human-computer interaction can be achieved by connecting to the Bluetooth module 110 via the button KEY. For example, users can configure the sampling frequency or data transmission frequency of the temperature and humidity sensor via the button KEY.

[0075] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A low-power sensor based on Bluetooth BLE, characterized in that, include: Bluetooth module, wherein the Bluetooth module is a low-power embedded Bluetooth module; A temperature and humidity sensor, which is connected to the Bluetooth module; A solar power module, which is connected to the Bluetooth module and the temperature and humidity sensor.

2. The low-power sensor based on Bluetooth BLE according to claim 1, characterized in that, The solar power module includes: A boost converter, the output of which is connected to a Bluetooth module and a temperature and humidity sensor, and the power input of which is equipped with an inductor L1; A solar panel, which is used to convert solar energy into electrical energy; the power output terminal of the solar panel is connected to the power input terminal of the boost converter through a diode D1. A battery, the output of which is connected to the power input of the boost converter.

3. The low-power sensor based on Bluetooth BLE according to claim 2, characterized in that, Also includes: A voltage detector, the power input terminal of which is connected to the power output terminal of the solar panel, and the power output terminal of which is connected to the power input terminal of the boost converter through diode D1.

4. The low-power sensor based on Bluetooth BLE according to claim 2, characterized in that, Also includes: The battery voltage detection circuit consists of a voltage divider circuit composed of resistors R9 and R10. The input terminal of the battery voltage detection circuit is connected to the power output terminal of the battery, and the output terminal of the battery voltage detection circuit is connected to the Bluetooth module.

5. The low-power sensor based on Bluetooth BLE according to claim 2, characterized in that, The solar panel is a low-light solar panel.

6. The low-power sensor based on Bluetooth BLE according to claim 1, characterized in that, The temperature and humidity sensor is a digital temperature and humidity sensor.

7. The low-power sensor based on Bluetooth BLE according to claim 1, characterized in that, Also includes: Indicator light, which is connected to the Bluetooth module.

8. The low-power sensor based on Bluetooth BLE according to claim 1, characterized in that, Also includes: A button, which is connected to the Bluetooth module.

Images