Electronic tag capable of automatically switching temperature measurement mode

Abstract

The application discloses an electronic tag capable of automatically switching temperature measuring modes, comprising an energy acquisition and management module, a processor, and a switch; the energy acquisition and management module is used for converting received environmental energy into electric energy, and supplies power for a high-frequency clock and a signal processing module when the switch is turned on, and stops supplying power for the high-frequency clock and the signal processing module when the switch is turned off; the processor is used for receiving a temperature value of an object attached with the electronic tag detected by a temperature sensor, and switching to a low-power-consumption temperature measuring mode when the temperature value is lower than an alarm limit; the processor is also used for switching to a high-power-consumption temperature measuring mode when the temperature value is determined to be higher than the alarm limit. The environmental energy is converted into electric energy by the energy acquisition and management module, and the electronic tag is switched to the low-power-consumption temperature measuring mode or the high-power-consumption temperature measuring mode according to the temperature value of the object attached with the electronic tag acquired by the temperature sensor; in the low-power-consumption temperature measuring mode, the switch is turned off to reduce the devices to be powered, the consumption of electric energy in the electronic tag is reduced, and the endurance time is prolonged.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to an electronic tag capable of automatically switching temperature measurement modes. Background Technology

[0002] Under the policy guidance of dual carbon targets, passive IoT technology is gradually becoming an important part of the 5G-A communication system. It requires that communication terminals cannot use batteries and can only obtain energy from the environment to power terminal devices. For example, electronic tags use light energy, temperature difference energy and radio frequency energy from the environment.

[0003] However, since the ambient energy is also unstable due to time-varying nature, this poses a huge challenge to the power consumption of the terminal, especially in scenarios where the temperature of the object to which the electronic tag is attached is monitored. If the temperature of the object is always below the alarm limit, the continuous use of ambient energy for power supply will greatly increase the power consumption of the electronic tag, thereby significantly shortening the battery life of the electronic tag. Summary of the Invention

[0004] This invention provides an electronic tag that can automatically switch temperature measurement modes, thereby extending the battery life of the electronic tag.

[0005] According to one aspect of the present invention, an electronic tag capable of automatically switching temperature measurement modes is provided, comprising a processor, a temperature sensor, a low-frequency clock, a high-frequency clock, and a signal processing module respectively connected to the processor, and an energy acquisition and management module respectively connected to the high-frequency clock and the signal processing module via a switch, wherein the energy acquisition and management module is directly connected to the processor and the temperature sensor.

[0006] The energy acquisition and management module is used to convert received ambient energy into electrical energy, and to supply power to the high-frequency clock and the signal processing module when the switch is turned on, and to stop supplying power to the high-frequency clock and the signal processing module when the switch is turned off, while continuously supplying power to the processor and the temperature sensor.

[0007] The processor is used to receive the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor, and switch to a low-power temperature measurement mode when the temperature value is lower than the alarm threshold. In the low-power temperature measurement mode, the processor communicates with the temperature sensor based on the low-frequency clock.

[0008] The processor is further configured to switch to a high-power temperature measurement mode when it is determined that the temperature value is higher than the alarm threshold. In the high-power temperature measurement mode, the processor communicates with an external device based on the high-frequency clock through the temperature sensor and the signal processing module to continuously report the temperature value to the external device.

[0009] According to another aspect of the present invention, an automatic temperature measurement mode switching method for an electronic tag is provided, comprising:

[0010] The energy acquisition and management module converts the received ambient energy into electrical energy, which powers the high-frequency clock and signal processing module when the switch is on, stops powering the high-frequency clock and signal processing module when the switch is off, and continues to power the processor and temperature sensor.

[0011] The processor receives the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor. When the temperature value is lower than the alarm threshold, it switches to a low-power temperature measurement mode. In the low-power temperature measurement mode, it communicates with the temperature sensor based on a low-frequency clock.

[0012] When the processor determines that the temperature value is higher than the alarm threshold, it switches to a high-power temperature measurement mode. In the high-power temperature measurement mode, based on the high-frequency clock, the processor communicates with external devices through the temperature sensor and the signal processing module to continuously report the temperature value to the external devices.

[0013] The technical solution of this invention converts environmental energy into electrical energy through an energy acquisition and management module. It then processes the temperature value of the object to which the electronic tag is attached based on the temperature value obtained by the temperature sensor and switches to a low-power temperature measurement mode or a high-power temperature measurement mode. In the low-power temperature measurement mode, the power consumption of the electronic tag is reduced by turning off the switch, thereby reducing the number of devices that need to be powered and extending the battery life.

[0014] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an electronic tag capable of automatically switching temperature measurement modes according to Embodiment 1 of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of an electronic tag capable of automatically switching temperature measurement modes according to Embodiment 2 of the present invention;

[0018] Figure 3 This is a flowchart of an automatic temperature measurement mode switching method for an electronic tag according to Embodiment 3 of the present invention. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, apparatus, product, or terminal device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or terminal devices.

[0021] Example 1

[0022] Figure 1 This is a schematic diagram of an electronic tag capable of automatically switching temperature measurement modes, provided by an embodiment of the present invention. This embodiment is applicable to situations where electronic tags automatically switch temperature measurement modes, such as... Figure 1 As shown, the structure of the electronic tag that can automatically switch temperature measurement modes includes: a processor, a temperature sensor, a low-frequency clock, a high-frequency clock, and a signal processing module connected to the processor respectively, and an energy acquisition and management module connected to the high-frequency clock and the signal processing module respectively via a switch, wherein the energy acquisition and management module is directly connected to the processor and the temperature sensor.

[0023] The energy acquisition and management module converts received environmental energy into electrical energy and supplies power to the high-frequency clock and signal processing module when the switch is on, and stops supplying power to the high-frequency clock and signal processing module when the switch is off, while continuously supplying power to the processor and temperature sensor. The processor receives the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor. When the temperature value is lower than the alarm threshold, it switches to a low-power temperature measurement mode, communicating with the temperature sensor based on a low-frequency clock. The processor also switches to a high-power temperature measurement mode when the temperature value is determined to be higher than the alarm threshold. In the high-power temperature measurement mode, it communicates with external devices based on a high-frequency clock through the temperature sensor and signal processing module to continuously report the temperature value to the external devices.

[0024] Optionally, the processor generates a timed sleep signal when the temperature value is determined to be below the alarm threshold, and sends the timed sleep signal to the switch so that the switch turns off according to the timed sleep signal and enters a low-power temperature measurement mode.

[0025] Optionally, in low-power temperature measurement mode, the processor acquires the temperature value sent by the temperature sensor in real time and uses a low-frequency clock to count down the sleep time; the processor is also used to generate a power-on signal when it determines that the countdown has ended or has not ended but the received temperature value is higher than the alarm threshold based on the low-frequency clock, and send the power-on signal to the switch so that the switch can be turned on according to the power-on signal; the energy acquisition and management module is used to supply power to the high-frequency clock and signal processing module when the switch is turned on, so that the processor can communicate with the external device once based on the high-frequency clock through the temperature sensor and signal processing module.

[0026] Specifically, in this embodiment, the electronic tag can be attached to a designated object, such as an object whose temperature changes according to environmental changes, and the temperature sensor in the electronic tag can collect the temperature value of the designated object. Furthermore, in this embodiment, alarm thresholds can be pre-configured in the processor. In practical applications, the alarm thresholds are generally set lower than the control thresholds; for example, an alarm is triggered only when the temperature exceeds 50°C, and remote intervention is only initiated when the temperature exceeds 60°C. The temperature rise from 50°C to 60°C generally takes some time, making the low-frequency reporting mode below the warning line reasonable. Even if the tag cannot report immediately upon reaching 50°C, as long as it reports successfully before reaching 60°C, there is little risk. Of course, this embodiment is only an example and does not limit the specific value of the alarm threshold; users can configure it according to their actual needs. Therefore, after receiving the temperature value sent by the temperature sensor, the processor generates a timed sleep signal when it determines that the temperature value is lower than the configured alarm threshold and sends the generated timed sleep signal to the switch. In this embodiment, the energy acquisition and management module is specifically connected to the high-frequency clock and signal processing module via a switch. Therefore, by switching the state of the switch, it can be determined whether to supply power to the high-power-consuming high-frequency clock and signal processing module. Since there is no safety hazard when the sensor temperature value is below the alarm threshold, the electronic tag does not need to report the temperature at a high frequency in principle. Therefore, in this case, the processor can control the switch to turn off by generating a sleep signal. In this embodiment, the switch can be a MOSFET. Of course, this embodiment is only an example and does not limit the specific type of switch. The generated sleep signal turns on the MOSFET with a very low duty cycle. Thus, when the MOSFET is off, the power-consuming high-frequency clock signal and signal processing module will be de-energized. At this time, only the processor communicates with the temperature sensor under the action of the low-frequency clock, and the electronic tag enters a low-power temperature measurement mode.

[0027] In low-power temperature measurement mode, when the processor and temperature sensor communicate, the processor acquires the temperature value sent by the temperature sensor in real time. Based on the acquired temperature value, the processor monitors the safety status of the designated object to which the electronic tag is attached in real time. When the electronic tag enters low-power temperature measurement mode, the processor sends a timed sleep signal to the switch, such as a sleep signal lasting 10 seconds. The switch will then turn off for 10 seconds according to the sleep signal. In low-power temperature measurement mode, a low-frequency clock is used to count down the sleep time. For example, after the 10-second countdown ends, the processor generates a power-on signal and sends it to the switch. The switch then turns on according to the power-on signal, thereby powering the high-frequency clock and signal processing module, which consume more power. The processor then communicates with external devices through the temperature sensor and signal processing module based on the high-frequency clock, enabling the external devices to know the temperature value of the object to which the electronic tag is attached. When the processor determines that the electronic tag is still in a safe state based on the temperature value sent by the temperature sensor, it will generate a timed sleep signal again. Thus, when the electronic tag is in a safe state, it only needs to communicate with external devices periodically to let the external devices know the temperature value of the object to which the electronic tag is attached. However, most of the time, the high-frequency clock and signal processing modules, which consume a lot of power, are in a turned-off state, which greatly reduces the power consumption in the energy acquisition and management module, and thus can extend the battery life of the electronic tag accordingly.

[0028] It should be noted that when the timed sleep signal is a sleep signal that lasts for 10 seconds, and the processor is counting down to sleep using a low-frequency clock, if the processor receives a temperature value from the temperature sensor that exceeds the alarm threshold before 10 seconds have elapsed, it indicates that the designated object to which the electronic tag is attached has a safety hazard. In this case, the processor will generate a power-on signal directly without waiting for the countdown to end and send the power-on signal to the switch, thereby supplying power to the high-frequency clock and signal processing module, which consume a lot of power.

[0029] Optionally, the processor generates an energizing signal when the temperature value is determined to be higher than the alarm threshold, and sends the energizing signal to the switch so that the switch opens according to the energizing signal and enters a high-power temperature measurement mode.

[0030] Optionally, in high-power temperature measurement mode, the processor is used to acquire a pre-configured communication mode and communicate with external devices according to the communication mode, wherein the communication mode includes an active communication mode or a passive communication mode.

[0031] Optionally, when the communication mode is active communication mode, the processor is used to send the acquired temperature value to the digital codec module;

[0032] The digital encoding and decoding module is used to encode the temperature value based on a high-frequency clock to obtain the encoded signal, and then send the encoded signal to the radio frequency analog front-end module;

[0033] The radio frequency analog front-end module is used to modulate the encoded signal to obtain the modulated signal, and then send the modulated signal to an external device through an antenna so that the external device can identify the modulated signal and obtain the temperature value of the object to which the tag is attached.

[0034] Optionally, when the communication mode is passive communication mode, the RF analog front-end module is used to receive inventory instructions sent by external devices through an antenna, demodulate the inventory instructions to obtain a demodulated signal, and send the demodulated signal to the digital codec module; the digital codec module is used to decode the demodulated signal based on a high-frequency clock to obtain a decoded signal, and send the decoded signal to the processor; the processor is used to send the obtained temperature value to the digital codec module when it receives the decoded signal; the digital codec module is used to encode the temperature value based on a high-frequency clock to obtain an encoded signal, and send the encoded signal to the RF analog front-end module; the RF analog front-end module is used to modulate the encoded signal to obtain a modulated signal, and send the modulated signal to the external device through an antenna, so that the external device can identify the modulated signal and obtain the temperature value of the object to which the tag is attached.

[0035] Specifically, when the temperature value obtained by the processor from the sensor exceeds the alarm threshold, the electronic tag needs to report it almost in real time. This allows the reader or base station to monitor the temperature of the object to which the tag is attached in real time and perform remote control accordingly. At this time, the processor generates an energizing signal and sends it to a switch. The MOSFET switch then turns on based on the energizing signal, thereby supplying power to the power-intensive high-frequency clock and signal processing module, enabling the electronic tag to communicate with the reader or base station in real time.

[0036] It should be noted that in high-power temperature measurement mode, the processor communicates with external devices according to a pre-configured communication mode, namely, active communication mode or passive communication mode. In active communication mode, the processor automatically sends communication information to the external device as soon as it confirms entering the motion operating mode, even if it has not received a signal from the external device. In passive communication mode, upon entering the high-power temperature measurement mode, it needs to receive a signal from the external device and only sends communication information after confirming receipt of the signal. Of course, this embodiment is merely an example and does not limit the specific communication mode used between the processor and the external device. As long as real-time communication with the external device in motion operating mode can be achieved, it is within the scope of protection of this application, and this embodiment does not limit it.

[0037] The technical solution of this invention converts environmental energy into electrical energy through an energy acquisition and management module. It then switches to a low-power temperature measurement mode or a high-power temperature measurement mode based on the temperature value of the object to which the electronic tag is attached, obtained by a temperature sensor. In the low-power temperature measurement mode, the power consumption of the electronic tag is reduced by turning off the switch, thereby reducing the number of devices that need to be powered and extending the battery life.

[0038] Example 2

[0039] Figure 2 This is a schematic diagram of the structure of an electronic tag capable of automatically switching temperature measurement modes, provided in an embodiment of the present invention. Based on the above embodiment, this embodiment provides a detailed explanation of the structure and working principle of the signal processing module. Figure 2 As shown, the signal processing module includes an RF analog front-end module and a digital codec module.

[0040] The radio frequency (RF) analog front-end module is used to acquire downlink signals from external devices via the electronic tag's antenna and to send uplink signals to external devices. The digital codec module is responsible for decoding the downlink baseband signal demodulated by the RF analog front-end module and encoding the data returned by the processor. High-frequency clock support is required during decoding to reduce the bit error rate or packet error rate. The processor is responsible for communication protocol processing and data parsing, as well as communicating with the sensor via the SPI / I2C standard interface.

[0041] In one specific implementation, when the processor determines that the electronic tag is in a high-power temperature measurement mode, if a passive communication mode is used to communicate with external devices, the power-intensive RF analog front-end module, digital codec module, and high-frequency clock will all be restored to power when the switch is on. Upon confirming that the aforementioned interfaces are powered back, the external device will send a temperature acquisition command to the electronic tag. The RF analog front-end module receives the temperature acquisition command through its antenna and demodulates it to obtain a demodulated signal, i.e., converting the analog signal into a digital signal. The RF analog front-end module then sends the acquired digital demodulated signal to the digital codec module. The digital codec module decodes the demodulated signal based on the high-frequency clock to obtain a decoded signal that the processor can recognize, and sends the decoded signal back to the processor. Upon receiving the decoded signal, the processor automatically feeds back the temperature value obtained from the temperature sensor as response information to the digital codec module. The digital codec module then encodes the temperature value, obtains the encoded signal, and sends it to the RF analog front-end module. This encoding process is the inverse of the decoding process described above. The radio frequency analog front-end module modulates the coded signal to obtain a modulated signal, that is, it converts the digital signal into an analog signal through modulation, and then feeds the modulated signal back to the external device through the antenna. After receiving the modulated signal fed back by the electronic tag, the external device can extract the temperature value contained in the modulated signal, thereby realizing real-time monitoring of the specified object to which the electronic tag is attached.

[0042] In another specific implementation, when the processor determines that the electronic tag is in a high-power temperature measurement mode, if the active communication mode is used to communicate with the external device, the specific communication process is roughly the same as the processing operation after the processor receives the decoded signal in the passive communication mode described above. Therefore, it will not be described in detail in this embodiment. The only difference is that the processor will actively communicate with the external device through the data encoding / decoding module and the RF analog front-end module as long as it determines that it has entered the high-power temperature measurement mode, without needing to receive a temperature acquisition command sent by the external device.

[0043] Example 3

[0044] Figure 3 This is a flowchart of an automatic temperature measurement mode switching method for an electronic tag provided in Embodiment 3 of the present invention. This embodiment is applicable to situations where the temperature measurement mode of an electronic tag is automatically switched. This method can be executed by an electronic tag capable of automatically switching temperature measurement modes as described in the above embodiment. Figure 3 As shown, the method includes:

[0045] Step S101: The received ambient energy is converted into electrical energy by the energy acquisition and management module, and the power supply is provided to the high-frequency clock and signal processing module when the switch is on, and the power supply to the high-frequency clock and signal processing module is stopped when the switch is off, while the power supply to the processor and temperature sensor is continuously provided.

[0046] Specifically, the energy acquisition and management module in this embodiment receives ambient energy, such as light energy, thermal energy, or radio frequency energy. Of course, this embodiment is only an example and does not limit the specific form of ambient energy. The energy acquisition and management module converts the acquired ambient energy into electrical energy. Since the electrical energy acquired by the electronic tag through ambient energy is very limited, in order to ensure that the electronic tag has as much battery life as possible, it is necessary to save as much power as possible and use it in the effective communication process.

[0047] Since the high-frequency clock and signal processing module are high-power-consuming components, they do not need to communicate with external devices in real time when the temperature of the designated object to which the electronic tag is attached is determined to be below the alarm threshold. Therefore, power can be saved by turning off the switch to stop powering the high-frequency clock and signal processing module. Because the processor and accelerometer are directly connected to the energy acquisition and management module, the energy acquisition and management module can continuously power the processor and accelerometer regardless of the switch state.

[0048] Step S102: The processor receives the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor. When the temperature value is lower than the alarm threshold, it switches to a low-power temperature measurement mode. In the low-power temperature measurement mode, it communicates with the temperature sensor based on a low-frequency clock.

[0049] Specifically, in this embodiment, the electronic tag can be attached to a designated object, such as an object whose temperature changes according to environmental changes, and the temperature sensor in the electronic tag can collect the temperature value of the designated object. Furthermore, in this embodiment, alarm thresholds can be pre-configured in the processor. In practical applications, the alarm thresholds are generally set lower than the control thresholds; for example, an alarm is triggered only when the temperature exceeds 50°C, and remote intervention is only initiated when the temperature exceeds 60°C. The temperature rise from 50°C to 60°C generally takes some time, making the low-frequency reporting mode below the warning line reasonable. Even if the tag cannot report immediately upon reaching 50°C, as long as it reports successfully before reaching 60°C, there is little risk. Of course, this embodiment is only an example and does not limit the specific value of the alarm threshold; users can configure it according to their actual needs. Therefore, after receiving the temperature value sent by the temperature sensor, the processor generates a timed sleep signal when it determines that the temperature value is lower than the configured alarm threshold and sends the generated timed sleep signal to the switch. In this embodiment, the energy acquisition and management module is specifically connected to the high-frequency clock and signal processing module via a switch. Therefore, by switching the state of the switch, it can be determined whether to supply power to the high-power-consuming high-frequency clock and signal processing module. Since there is no safety hazard when the sensor temperature value is below the alarm threshold, the electronic tag does not need to report the temperature at a high frequency in principle. Therefore, in this case, the processor can control the switch to turn off by generating a sleep signal. In this embodiment, the switch can be a MOSFET. Of course, this embodiment is only an example and does not limit the specific type of switch. The generated sleep signal turns on the MOSFET with a very low duty cycle. Thus, when the MOSFET is off, the power-consuming high-frequency clock signal and signal processing module will be de-energized. At this time, only the processor communicates with the temperature sensor under the action of the low-frequency clock, and the electronic tag enters a low-power temperature measurement mode.

[0050] In low-power temperature measurement mode, when the processor and temperature sensor communicate, the processor acquires the temperature value sent by the temperature sensor in real time. Based on the acquired temperature value, the processor monitors the safety status of the designated object to which the electronic tag is attached in real time. When the electronic tag enters low-power temperature measurement mode, the processor sends a timed sleep signal to the switch, such as a sleep signal lasting 10 seconds. The switch will then turn off for 10 seconds according to the sleep signal. In low-power temperature measurement mode, a low-frequency clock is used to count down the sleep time. For example, after the 10-second countdown ends, the processor generates a power-on signal and sends it to the switch. The switch then turns on according to the power-on signal, thereby powering the high-frequency clock and signal processing module, which consume more power. The processor then communicates with external devices through the temperature sensor and signal processing module based on the high-frequency clock, enabling the external devices to know the temperature value of the object to which the electronic tag is attached. When the processor determines that the electronic tag is still in a safe state based on the temperature value sent by the temperature sensor, it will generate a timed sleep signal again. Thus, when the electronic tag is in a safe state, it only needs to communicate with external devices periodically to let the external devices know the temperature value of the object to which the electronic tag is attached. However, most of the time, the high-frequency clock and signal processing modules, which consume a lot of power, are in a turned-off state, which greatly reduces the power consumption in the energy acquisition and management module, and thus can extend the battery life of the electronic tag accordingly.

[0051] It should be noted that when the timed sleep signal is a sleep signal that lasts for 10 seconds, and the processor is counting down to sleep using a low-frequency clock, if the processor receives a temperature value from the temperature sensor that exceeds the alarm threshold before 10 seconds have elapsed, it indicates that the designated object to which the electronic tag is attached has a safety hazard. In this case, the processor will generate a power-on signal directly without waiting for the countdown to end and send the power-on signal to the switch, thereby supplying power to the high-frequency clock and signal processing module, which consume a lot of power.

[0052] In step S103, when the processor determines that the temperature value is higher than the alarm limit, it switches to a high-power temperature measurement mode. In the high-power temperature measurement mode, the temperature sensor and signal processing module communicate with the external device based on a high-frequency clock to continuously report the temperature value to the external device.

[0053] Specifically, when the temperature value obtained by the processor from the sensor exceeds the alarm threshold, the electronic tag needs to report it almost in real time. This allows the reader or base station to monitor the temperature of the object to which the tag is attached in real time and perform remote control accordingly. At this time, the processor generates an energizing signal and sends it to a switch. The MOSFET switch then turns on based on the energizing signal, thereby supplying power to the power-intensive high-frequency clock and signal processing module, enabling the electronic tag to communicate with the reader or base station in real time.

[0054] It should be noted that in high-power temperature measurement mode, the processor communicates with external devices according to a pre-configured communication mode, namely, active communication mode or passive communication mode. In active communication mode, the processor automatically sends communication information to the external device as soon as it confirms entering the motion operating mode, even if it has not received a signal from the external device. In passive communication mode, upon entering the high-power temperature measurement mode, it needs to receive a signal from the external device and only sends communication information after confirming receipt of the signal. Of course, this embodiment is merely an example and does not limit the specific communication mode used between the processor and the external device. As long as real-time communication with the external device in motion operating mode can be achieved, it is within the scope of protection of this application, and this embodiment does not limit it.

[0055] The technical solution of this invention converts environmental energy into electrical energy through an energy acquisition and management module. It then switches to a low-power temperature measurement mode or a high-power temperature measurement mode based on the temperature value of the object to which the electronic tag is attached, obtained by a temperature sensor. In the low-power temperature measurement mode, the power consumption of the electronic tag is reduced by turning off the switch, thereby reducing the number of devices that need to be powered and extending the battery life.

[0056] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An electronic tag capable of automatically switching temperature measurement modes, characterized in that, The system includes a processor, a temperature sensor, a low-frequency clock, a high-frequency clock, and a signal processing module, all connected to the processor, and an energy harvesting and management module connected to the high-frequency clock and the signal processing module via switches. The energy harvesting and management module is directly connected to the processor and the temperature sensor. The energy acquisition and management module is used to convert received ambient energy into electrical energy, and to supply power to the high-frequency clock and the signal processing module when the switch is turned on, and to stop supplying power to the high-frequency clock and the signal processing module when the switch is turned off, while continuously supplying power to the processor and the temperature sensor. The processor is used to receive the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor, and switch to a low-power temperature measurement mode when the temperature value is lower than the alarm threshold. In the low-power temperature measurement mode, the processor communicates with the temperature sensor based on the low-frequency clock. The processor is further configured to switch to a high-power temperature measurement mode when it is determined that the temperature value is higher than the alarm threshold. In the high-power temperature measurement mode, the processor communicates with an external device based on the high-frequency clock through the temperature sensor and the signal processing module to continuously report the temperature value to the external device.

2. The electronic tag with automatically switching temperature measurement modes according to claim 1, characterized in that, The signal processing module includes a radio frequency analog front-end module and a digital encoding / decoding module; The external device includes a base station or a reader.

3. The electronic tag with automatically switching temperature measurement modes according to claim 2, characterized in that, The processor is configured to generate a timed sleep signal when it determines that the temperature value is lower than the alarm threshold, and send the timed sleep signal to the switch so that the switch turns off according to the timed sleep signal and enters the low-power temperature measurement mode.

4. The electronic tag with automatically switching temperature measurement modes according to claim 3, characterized in that, In the low-power temperature measurement mode, the processor acquires the temperature value sent by the temperature sensor in real time and uses the low-frequency clock to count down the sleep time. The processor is further configured to generate an energizing signal when it is determined, based on the low-frequency clock, that the countdown has ended or has not ended but the received temperature value is higher than the alarm threshold, and send the energizing signal to the switch so that the switch opens according to the energizing signal; The energy acquisition and management module is used to supply power to the high-frequency clock and the signal processing module when the switch is turned on, so that the processor can communicate with external devices based on the high-frequency clock through the temperature sensor and the signal processing module.

5. The electronic tag with automatically switching temperature measurement modes according to claim 2, characterized in that, The processor is configured to generate a power-on signal when it determines that the temperature value is higher than the alarm threshold, and send the power-on signal to the switch so that the switch opens according to the power-on signal and enters the high-power temperature measurement mode.

6. The electronic tag with automatically switching temperature measurement modes according to claim 5, characterized in that, In the high-power temperature measurement mode, the processor is used to acquire a pre-configured communication mode and communicate with external devices according to the communication mode, wherein the communication mode includes an active communication mode or a passive communication mode.

7. The electronic tag with automatically switching temperature measurement modes according to claim 6, characterized in that, When the communication mode is active communication mode, the processor is used to send the acquired temperature value to the digital codec module; The digital encoding / decoding module is used to encode the temperature value based on the high-frequency clock to obtain an encoded signal, and send the encoded signal to the radio frequency analog front-end module; The radio frequency analog front-end module is used to modulate the encoded signal to obtain a modulated signal, and send the modulated signal to the external device through an antenna, so that the external device can identify the modulated signal and obtain the temperature value of the object to which the tag is attached.

8. The electronic tag with automatically switching temperature measurement modes according to claim 6, characterized in that, When the communication mode is passive communication mode, the radio frequency analog front-end module is used to receive the inventory command sent by the external device through the antenna, demodulate the inventory command to obtain the demodulated signal, and send the demodulated signal to the digital codec module. The digital encoding / decoding module is used to decode the demodulated signal based on the high-frequency clock to obtain a decoded signal, and send the decoded signal to the processor; The processor is configured to send the acquired temperature value to the digital codec module when it receives the decoding signal; The digital encoding / decoding module is used to encode the temperature value based on the high-frequency clock to obtain an encoded signal, and send the encoded signal to the radio frequency analog front-end module; The radio frequency analog front-end module is used to modulate the encoded signal to obtain a modulated signal, and send the modulated signal to the external device through an antenna, so that the external device can identify the modulated signal and obtain the temperature value of the object to which the tag is attached.

9. A method for automatically switching temperature measurement modes of an electronic tag, characterized in that, The method includes: The energy acquisition and management module converts the received ambient energy into electrical energy, which powers the high-frequency clock and signal processing module when the switch is on, stops powering the high-frequency clock and signal processing module when the switch is off, and continues to power the processor and temperature sensor. The processor receives the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor. When the temperature value is lower than the alarm threshold, it switches to a low-power temperature measurement mode. In the low-power temperature measurement mode, it communicates with the temperature sensor based on a low-frequency clock. When the processor determines that the temperature value is higher than the alarm threshold, it switches to a high-power temperature measurement mode. In the high-power temperature measurement mode, based on the high-frequency clock, the processor communicates with external devices through the temperature sensor and the signal processing module to continuously report the temperature value to the external devices.

10. The method according to claim 9, characterized in that, The process of receiving the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor, through the processor, and switching to a low-power temperature measurement mode when the temperature value is lower than the alarm threshold, includes: The processor receives the temperature value of the object to which the electronic tag is attached, detected by the temperature sensor, and generates a timed sleep signal when the temperature value is lower than the alarm threshold. The timed sleep signal is sent to the switch so that the switch turns off according to the timed sleep signal and enters the low-power temperature measurement mode.

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