Wind energy harvesting wireless temperature sensor, device and system

Abstract

The application discloses a wind energy collection wireless temperature sensor, device and system. The sensor comprises a temperature collection unit, a data transmission unit and a power supply unit. The temperature collection unit is used for collecting temperature data. The data transmission unit comprises a microprocessor and a wireless transceiver module. The temperature collection unit is connected to the data input end of the microprocessor. The microprocessor is connected to the wireless transceiver module to connect to an external controller through a wireless signal. The power supply unit comprises a wind energy collection charging module and a battery module. The battery module is used for supplying power to the temperature collection unit and the data transmission unit. The wind energy collection charging module is connected to the battery module to collect wind energy and charge the battery module. The application can realize self-power supply through wind energy collection of an air duct, does not need wiring, can reduce installation and deployment cost and reduce installation complexity.

Description

Technical Field

[0001] This application relates to the field of temperature monitoring, and in particular to a wireless temperature sensor, device and system for wind energy harvesting. Background Technology

[0002] In existing industrial applications, temperature sensors used for duct temperature control primarily employ wired connections, placing the sensor probes within the duct and integrating the sensor's electrical signals into a field data acquisition system for interaction with a central digital controller. Wireless temperature sensors, on the other hand, are battery-powered and mainly used for operational status monitoring. To ensure long-term battery operation, their acquisition frequency is typically limited to once per minute at most, failing to balance the need for second-level data transmission required for control and the long-term power consumption. For example, wireless sensors measuring supply air temperature in the air ducts of building central air handling units typically acquire data once per minute, uploading the data directly to a database for real-time monitoring of the air handling unit's operational status. These types of wireless sensors do not interact with the field control system.

[0003] The application of existing wireless temperature sensors in duct temperature control still faces limitations, primarily due to the high power consumption of battery-powered wireless sensors and their low transmission frequency. While wired temperature sensors eliminate the need for power supply considerations and allow for variable-frequency sampling, they require complex field wiring for installation, and because the data is ultimately transmitted directly to a central controller, they cannot be customized to meet diverse monitoring and control needs. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a wind energy harvesting wireless temperature sensor, device, and system that can achieve self-powered operation by harvesting wind energy from a wind duct, and requires no wiring, thereby reducing installation and deployment costs and simplifying installation.

[0005] A wireless temperature sensor for wind energy harvesting according to a first aspect embodiment of this application is installed inside a wind duct, comprising:

[0006] A temperature acquisition unit, which is used to acquire temperature data;

[0007] The data transmission unit includes a microprocessor and a wireless transmission and reception module. The temperature acquisition unit is connected to the data input terminal of the microprocessor, and the microprocessor is connected to the wireless transmission and reception module for connecting to an external controller via wireless signals.

[0008] The power supply unit includes a wind energy harvesting and charging module and a battery module. The battery module is used to supply power to the temperature acquisition unit and the data transmission unit. The wind energy harvesting and charging module is connected to the battery module to harvest wind energy and charge the battery module.

[0009] According to some embodiments of this application, the temperature acquisition unit includes a temperature probe and a temperature acquisition module. The temperature probe is connected to the input terminal of the temperature acquisition module, the temperature acquisition module is used to convert the analog signal from the temperature probe into a digital signal, and the output terminal of the temperature acquisition module is connected to the microprocessor.

[0010] According to some embodiments of this application, the temperature probe is a four-wire PT100.

[0011] According to some embodiments of this application, the temperature acquisition module is a MAX31865.

[0012] According to some embodiments of this application, a wind energy harvesting and charging module includes a wind turbine and a charging chip, wherein the wind turbine is connected to the input terminal of the charging chip, and the output terminal of the charging chip is connected to the battery module.

[0013] According to some embodiments of this application, the charging chip is TP4056-MS.

[0014] According to some embodiments of this application, the battery module includes a first battery pack, a second battery pack, a voltage detection chip, and a switching switch. The first battery pack and the second battery pack are both connected to the input terminal of the switching switch. The voltage detection chip is connected to the first battery pack and the second battery pack respectively for measuring the power level. The voltage detection chip is connected to the control terminal of the switching switch for switching between the first battery pack and the second battery pack according to the power level. The output terminal of the switching switch is connected to the power supply terminal of the temperature acquisition unit and the data transmission unit.

[0015] According to some embodiments of this application, the voltage detection chip is LTC2991IMS#PBF.

[0016] According to a second aspect of this application, a duct temperature monitoring device includes a controller and the aforementioned wind energy harvesting wireless temperature sensor. The wind energy harvesting wireless temperature sensor is installed inside the duct, and the controller is installed outside the duct. The wind energy harvesting wireless temperature sensor is wirelessly connected to the controller.

[0017] An automatic control system according to a third aspect of this application includes the above-described duct temperature monitoring device.

[0018] The wind energy harvesting wireless temperature sensor, device, and system according to the embodiments of this application have at least the following beneficial effects:

[0019] In this embodiment, the temperature inside the air duct is collected by a temperature acquisition unit and sent to a data transmission unit. The microprocessor in the data transmission unit transmits the temperature data via a wireless transmit / receive module. The power supply unit includes a wind energy harvesting and charging module that uses wind energy from the air duct to charge the battery module, providing continuous power to the temperature acquisition unit and the data transmission unit. This application achieves self-powering through wind energy harvesting from the air duct, eliminating the need for wiring, reducing installation costs and complexity.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the wind energy harvesting wireless temperature sensor in the embodiments of this application;

[0023] Figure 2 This is a circuit diagram of the wireless temperature sensor for wind energy harvesting in an embodiment of this application;

[0024] Figure 3 This is a circuit schematic diagram of the charging chip in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram illustrating the temperature control effect of the wireless temperature sensor for wind energy harvesting according to an embodiment of this application. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0027] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0028] In the description of this application, "multiple" refers to two or more. The use of "first" and "second" is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or the order in which the technical features are indicated.

[0029] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 As shown, a wind energy harvesting wireless temperature sensor, installed inside a wind duct, includes: a temperature acquisition unit for acquiring temperature data; a data transmission unit, comprising a microprocessor and a wireless transmitter / receiver module, wherein the temperature acquisition unit is connected to the data input terminal of the microprocessor, and the microprocessor is connected to the wireless transmitter / receiver module for connecting to an external controller via a wireless signal; and a power supply unit, comprising a wind energy harvesting charging module and a battery module, wherein the battery module supplies power to the temperature acquisition unit and the data transmission unit, and the wind energy harvesting charging module is connected to the battery module for harvesting wind energy and charging the battery module.

[0031] In this embodiment, the temperature inside the air duct is collected by a temperature acquisition unit and sent to a data transmission unit. The microprocessor in the data transmission unit transmits the temperature data via a wireless transmit / receive module. The power supply unit includes a wind energy harvesting and charging module, which uses wind energy from the air duct to charge the battery module, providing continuous power to the temperature acquisition unit and the data transmission unit. This application achieves self-powering through wind energy harvesting from the air duct, eliminating the need for wiring, reducing installation costs and complexity.

[0032] The temperature acquisition unit is responsible for collecting temperature data within the air duct and converting it into an electrical signal. The temperature acquisition unit can be a digital temperature probe or an analog temperature probe with A / D conversion.

[0033] In some implementations, the temperature acquisition unit in this embodiment includes a temperature probe and a temperature acquisition module. The temperature probe is connected to the input terminal of the temperature acquisition module, and the temperature acquisition module is used to convert the analog signal from the temperature probe into a digital signal. The output terminal of the temperature acquisition module is connected to a microprocessor.

[0034] Specifically, in this embodiment, the temperature acquisition unit senses the real-time temperature through a thermistor temperature probe. Different temperatures will generate different current signals. The temperature acquisition module performs digital-to-analog conversion on the current signals. The converted digital temperature signal is read by the microprocessor using a high-speed wired communication method via a Serial Peripheral Interface (SPI).

[0035] Specifically, the data transmission unit includes a microprocessor and a wireless transceiver module. The wireless transceiver module receives data from the microprocessor and sends data to the microprocessor via serial communication. The data received from the microprocessor will be transmitted unchanged via radio signals according to the configured channel frequency and encryption method, and will be acquired by the wireless transceiver module of the corresponding controller.

[0036] For example, in one application scenario, the wireless transmitting and receiving modules automatically enter a low-power state when there is no signal to process. The microprocessor processes the data received from each module and sends the corresponding data to each module. The microprocessor sends configuration and read commands to the temperature acquisition module, then receives and saves the temperature digital signal, and sends it to the wireless module on schedule according to the sampling frequency. During other idle waiting times, the microprocessor will also enter a low-power state to reduce power consumption.

[0037] In some implementations, the wind energy harvesting and charging module includes a wind turbine and a charging chip, with the wind turbine connected to the input terminal of the charging chip and the output terminal of the charging chip connected to the battery module.

[0038] Specifically, the wind energy harvesting and charging module uses a DC small wind turbine and a charging chip. The charging chip stabilizes the current generated by the wind energy harvesting and charging module and then inputs it into the battery module for charging.

[0039] In some embodiments, the battery module includes a first battery pack, a second battery pack, a voltage detection chip, and a switching switch. The first battery pack and the second battery pack are both connected to the input terminal of the switching switch. The voltage detection chip is connected to the first battery pack and the second battery pack respectively to measure the power level. The voltage detection chip is connected to the control terminal of the switching switch to switch between the first battery pack and the second battery pack according to the power level. The output terminal of the switching switch is connected to the power supply terminal of the temperature acquisition unit and the data transmission unit.

[0040] refer to Figure 1As shown, in this embodiment, the first battery pack is battery #1 and the second battery pack is battery #2. The battery packs #1 and #2 form a dual-battery module. During operation, one battery pack is charged while the other battery pack is discharged. The battery voltage is monitored by a voltage detection chip. When the battery to be discharged is about to be depleted, the other battery pack is switched to provide power through a switching switch, ensuring uninterrupted real-time operation of temperature acquisition and wireless signal transmission.

[0041] refer to Figure 2 As shown below, a specific circuit example of this application is described.

[0042] In this embodiment, the microprocessor uses an STM32L051C8T6 chip to meet the functional requirements of data acquisition and data transmission. The temperature probe is a four-wire PT100, which can achieve accurate temperature acquisition with high precision. The temperature acquisition module is a MAX31865, which can provide high-precision RTD temperature measurement. The wireless transmission and reception module uses a Zigbee module. (Reference) Figure 3 As shown, the charging chip is a TP4056-MS, which can improve the stability and reliability during the charging process. In this embodiment, one TP4056-MS is configured for each of the first and second battery packs. The voltage detection chip uses an LTC2991IMS#PBF chip to monitor the battery voltage. If the measured voltage is less than the required threshold, the operating and charging battery is switched to achieve reliable power supply.

[0043] This application also relates to a duct temperature monitoring device, including a controller and a wind energy harvesting wireless temperature sensor as described in the above embodiment. The wind energy harvesting wireless temperature sensor is installed inside the duct, and the controller is installed outside the duct. The wind energy harvesting wireless temperature sensor and the controller are wirelessly connected.

[0044] This application also relates to an automatic control system, including the duct temperature monitoring device of the above embodiments.

[0045] The automatic control system of this application can be a fresh air system or air handling control system for a building or factory. As an example, the working process of this application is illustrated below using the supply air temperature feedback control in the on-site automatic control system of a building's central air handling unit as a case study:

[0046] S101. Establish a Zigbee protocol link between the controller and the wind energy harvesting wireless temperature sensor of this application;

[0047] S102, The controller sends a sampling frequency command to the wireless temperature sensor. The wireless transmission and reception module of the wireless temperature sensor receives the command data and the microprocessor updates the transmission timer.

[0048] S103. The temperature data is transmitted to the controller via the wireless transmission and reception module at the required sampling frequency through the timer's timer interrupt function.

[0049] S104. The controller calculates the control output based on the acquired temperature data according to the control frequency and transmits it to the valve actuator via wired connection.

[0050] S105. The valve operates according to the actuator signal;

[0051] S106. Repeat steps S103 to S105. If there is a new control frequency requirement, then execute step S102 and repeat steps S103 to S105.

[0052] The following describes three application scenarios in this embodiment:

[0053] refer to Figure 4 As shown, the initial control frequency is set to one data transmission per second from the wireless temperature sensor. The upper solid line represents the air supply temperature, the lower solid line represents the water flow rate, and the dashed line indicates the setpoint. The first two scenarios are set to air supply temperatures of 50℃ and 47℃ respectively. The third scenario will switch to water flow control and set the wireless temperature sensor to transmit data every sixty seconds for monitoring. The control results are as follows. Figure 4 As shown, the wireless temperature sensor of this application can effectively control the target temperature near the desired set point, and in the third stage, it can effectively adjust the temperature transmission frequency to once every sixty seconds, realizing the variable sampling frequency adjustment function.

[0054] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A wireless temperature sensor for wind energy harvesting, installed inside a wind duct, characterized in that, include: A temperature acquisition unit, which is used to acquire temperature data; The data transmission unit includes a microprocessor and a wireless transmission and reception module. The temperature acquisition unit is connected to the data input terminal of the microprocessor, and the microprocessor is connected to the wireless transmission and reception module for connecting to an external controller via wireless signals. The power supply unit includes a wind energy harvesting and charging module and a battery module. The battery module is used to supply power to the temperature acquisition unit and the data transmission unit. The wind energy harvesting and charging module is connected to the battery module to harvest wind energy and charge the battery module.

2. The wind energy harvesting wireless temperature sensor according to claim 1, characterized in that, The temperature acquisition unit includes a temperature probe and a temperature acquisition module. The temperature probe is connected to the input terminal of the temperature acquisition module. The temperature acquisition module is used to convert the analog signal from the temperature probe into a digital signal. The output terminal of the temperature acquisition module is connected to the microprocessor.

3. The wind energy harvesting wireless temperature sensor according to claim 2, characterized in that, The temperature probe is a four-wire PT100.

4. The wind energy harvesting wireless temperature sensor according to claim 2, characterized in that, The temperature acquisition module is MAX31865.

5. The wind energy harvesting wireless temperature sensor according to claim 1, characterized in that, The wind energy harvesting and charging module includes a wind turbine and a charging chip. The wind turbine is connected to the input terminal of the charging chip, and the output terminal of the charging chip is connected to the battery module.

6. The wind energy harvesting wireless temperature sensor according to claim 5, characterized in that, The charging chip is TP4056-MS.

7. The wind energy harvesting wireless temperature sensor according to claim 1, characterized in that, The battery module includes a first battery pack, a second battery pack, a voltage detection chip, and a switching switch. The first battery pack and the second battery pack are both connected to the input terminal of the switching switch. The voltage detection chip is connected to the first battery pack and the second battery pack respectively to measure the power level. The voltage detection chip is connected to the control terminal of the switching switch to switch between the first battery pack and the second battery pack according to the power level. The output terminal of the switching switch is connected to the power supply terminal of the temperature acquisition unit and the data transmission unit.

8. The wind energy harvesting wireless temperature sensor according to claim 7, characterized in that, The voltage detection chip is LTC2991IMS#PBF.

9. A duct temperature monitoring device, characterized in that, The device includes a controller and a wind energy harvesting wireless temperature sensor as described in any one of claims 1 to 8, wherein the wind energy harvesting wireless temperature sensor is installed inside the wind duct, the controller is installed outside the wind duct, and the wind energy harvesting wireless temperature sensor is wirelessly connected to the controller.

10. An automatic control system, characterized in that, Includes the duct temperature monitoring device as described in claim 9.

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