Label chip awakening method and device based on sensitivity switching

Abstract

The invention provides a label chip awakening method and device based on sensitivity switching. According to the method, in an initialization stage, an optimal wake-up sensitivity threshold value is searched through fixed-distance wake-up, so that a tag chip can switch a high-sensitivity wake-up mode and a low-sensitivity mode according to the strength of a wake-up signal and the optimal wake-up sensitivity threshold value in a use stage; and a low-sensitivity mode with lower power consumption can be selected as much as possible to realize wakeup, so that the wakeup success rate of the tag chip is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a tag chip wake-up method and device based on sensitivity switching. Background Art

[0002] For passive tag chips, wake-up sensitivity refers to the minimum energy required to activate the tag chip when the tag chip is in sleep mode. High sensitivity means low activation energy is required, and low sensitivity means high activation energy is required. In the prior art, the wake-up sensitivity of the tag chip is usually determined. If the sensitivity of the tag chip is designed to be high, it is necessary to configure the wake-up circuit with amplifiers, automatic gain and other modules to achieve signal amplification. This will cause the problem of high chip wake-up power consumption. When the tag chip is far away from the transmitter, the passive tag chip has low receiving energy, and the receiving energy may be insufficient to meet the wake-up power consumption, resulting in a situation where the tag cannot be woken up. If the sensitivity is designed to be low, it is also possible that due to insufficient sensitivity, the tag chip cannot be woken up when it is far away from the transmitter. Summary of the Invention

[0003] Purpose of the invention: The present invention aims to propose a tag chip wake-up method and device based on sensitivity switching, so as to at least partially overcome the defects of the prior art.

[0004] Summary of the invention: To achieve the above objectives, the present invention proposes the following technical solutions: In a first aspect, a tag chip wake-up method based on sensitivity switching is provided, wherein the tag chip includes a wake-up module; the method includes: Initialization stage: use the transmitter to perform fixed-distance wake-up on the tag chip in the dormant state; in each fixed-distance wake-up process, use the wake-up module of the tag chip to detect the strength of the wake-up signal; if the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, select the low-sensitivity wake-up mode for wake-up; if the strength of the wake-up signal is less than the current wake-up sensitivity threshold, select the high-sensitivity wake-up mode for wake-up; if the tag chip is successfully awakened in the low-sensitivity wake-up mode, increase the wake-up sensitivity threshold according to the preset threshold update strategy; if the tag chip is successfully awakened in the high-sensitivity wake-up mode, reduce the wake-up sensitivity threshold according to the preset threshold update strategy; repeat the fixed-distance wake-up process until the wake-up sensitivity threshold no longer changes, and use the wake-up sensitivity threshold at this time as the optimal wake-up sensitivity threshold; Use phase: the wake-up signal is sent to the tag chip through the transmitter, and the wake-up module of the tag chip selects a corresponding wake-up mode according to the optimal wake-up sensitivity threshold to wake up the tag chip.

[0005] As an optional implementation manner of the method of the first aspect, the wake-up module includes: a digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module; During the initialization phase, the digital baseband module is configured to obtain the wake-up signal sent by the transmitter, send the wake-up signal to the energy detection module, and adjust the wake-up sensitivity threshold according to the wake-up mode and wake-up result fed back by the energy detection module; the energy detection module is configured to detect the strength of the wake-up signal, and trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the strength of the wake-up signal and the current wake-up sensitivity threshold; and feed back the wake-up mode and the wake-up result to the digital baseband module; During the usage phase, the digital baseband module is configured to obtain the wake-up signal emitted by the transmitter and send the wake-up signal to the energy detection module; the energy detection module is configured to trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the intensity of the wake-up signal and the current wake-up sensitivity threshold.

[0006] Furthermore, the energy detection module is pre-set with multiple wake-up sensitivity threshold gears, and the multiple wake-up sensitivity threshold gears are arranged from small to large according to the wake-up sensitivity threshold; in the initialization stage, the digital baseband module determines the corresponding wake-up sensitivity threshold gear code based on the wake-up mode and wake-up result feedback from the energy detection module, and sends the wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

[0007] Specifically, in the initialization stage, if the intensity of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up. If the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased by one level.

[0008] Specifically, in the initialization stage, if the intensity of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up. If the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is adjusted down one level.

[0009] In a second aspect, a tag chip wake-up device based on sensitivity switching is provided, comprising a transmitter and a tag chip, wherein the tag chip comprises a wake-up module; During the initialization phase, the transmitter is configured to perform multiple rounds of fixed-distance wake-up on the tag chip in a dormant state; the tag chip is configured to use the wake-up module to detect the strength of the wake-up signal emitted by the transmitter. If the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up; if the strength of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up; if the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased according to a preset threshold update strategy; if the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is reduced according to a preset threshold update strategy; the update process of the wake-up sensitivity threshold is repeated until the wake-up sensitivity threshold no longer changes, and the wake-up sensitivity threshold at this time is used as the optimal wake-up sensitivity threshold; During the use phase: the transmitter is configured to send the wake-up signal to the tag chip; the tag chip is configured to wake up the tag chip by selecting a corresponding wake-up mode according to the optimal wake-up sensitivity threshold through the wake-up module.

[0010] As an optional implementation manner of the device according to the second aspect, the wake-up module includes: a digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module; During the initialization phase, the digital baseband module is configured to obtain the wake-up signal sent by the transmitter, send the wake-up signal to the energy detection module, and adjust the wake-up sensitivity threshold according to the wake-up mode and wake-up result fed back by the energy detection module; the energy detection module is configured to detect the strength of the wake-up signal, and trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the strength of the wake-up signal and the current wake-up sensitivity threshold; and feed back the wake-up mode and the wake-up result to the digital baseband module; During the usage phase, the digital baseband module is configured to obtain the wake-up signal emitted by the transmitter and send the wake-up signal to the energy detection module; the energy detection module is configured to trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the intensity of the wake-up signal and the current wake-up sensitivity threshold.

[0011] Furthermore, the energy detection module is pre-set with multiple wake-up sensitivity threshold gears, and the multiple wake-up sensitivity threshold gears are arranged from small to large according to the wake-up sensitivity threshold; in the initialization stage, the digital baseband module is used to determine the corresponding wake-up sensitivity threshold gear code according to the wake-up mode and wake-up result feedback from the energy detection module, and send the wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

[0012] Specifically, the digital baseband module is specifically used to: In the initialization phase, if the wake-up mode fed back by the energy detection module is the low-sensitivity wake-up mode, and the tag chip is successfully awakened in the low-sensitivity wake-up mode, the digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module increases the wake-up sensitivity threshold by one gear.

[0013] Specifically, the digital baseband module is specifically used to: In the initialization phase, if the wake-up mode fed back by the energy detection module is the high-sensitivity wake-up mode, and the tag chip is successfully awakened in the high-sensitivity wake-up mode, the digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module adjusts the wake-up sensitivity threshold down by one gear.

[0014] Beneficial effects: Compared with the prior art, the tag chip wake-up method based on sensitivity switching proposed in the present invention has the following advantages: In the initialization phase, this method searches for the optimal wake-up sensitivity threshold through fixed-distance wake-up, so that the tag chip can switch between high-sensitivity wake-up mode and low-sensitivity mode according to the strength of the wake-up signal and the optimal wake-up sensitivity threshold during the use phase, and can select the low-sensitivity mode with lower power consumption to achieve wake-up as much as possible, thereby improving the wake-up success rate of the tag chip.

[0015] The tag chip wake-up device based on sensitivity switching proposed in the present invention also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a flow chart of a tag chip wake-up method based on sensitivity switching according to an embodiment.

[0017] Figure 2 The figure is a schematic structural diagram of a tag chip involved in the embodiment.

[0018] Figure 3Schematic diagram of the structure of a low-sensitivity wake-up module involved in the embodiment.

[0019] Figure 4 This is a structural diagram of a high-sensitivity wake-up module involved in an embodiment.

[0020] Figure 5 The figure is a structural diagram of a tag chip wake-up device based on sensitivity switching involved in an embodiment. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should be understood that the present invention may be implemented in various forms, and the following exemplary and non-limiting embodiments shown in the drawings and described below are not intended to limit the present invention to the specific embodiments described.

[0022] It should be understood that, where technically feasible, the technical features listed above for different embodiments may be combined with each other to form additional embodiments within the scope of the present invention. In addition, the specific examples and embodiments described in the present invention are non-limiting, and the structures, steps, and sequences described above may be modified accordingly without departing from the scope of protection of the present invention.

[0023] This embodiment aims to address the shortcomings of the existing wake-up scheme of the tag chip with fixed sensitivity, and provides a tag chip wake-up method and device based on sensitivity switching, so as to at least partially overcome the technical defects of the existing tag chip wake-up scheme.

[0024] Please refer to Figure 1 , Figure 1 A flowchart illustrating a method for waking up a tag chip based on sensitivity switching is provided. The tag chip includes a wakeup module. This method comprises two phases: the first is an initialization phase, and the second is an operational phase. The initialization phase includes steps S100 to S106, and the operational phase includes steps S108 to S110.

[0025] First, the initialization phase is introduced, which specifically includes steps S100 to S106.

[0026] S100: Using a transmitter to wake up a tag chip in a dormant state at a fixed distance.

[0027] The tag chip is a passive chip that draws energy from electromagnetic waves sent by a transmitter. During the wakeup process, the tag chip draws energy from the wakeup signal sent by the transmitter to power the wakeup module's signal demodulation circuit. The demodulation result then triggers the tag chip to switch from sleep mode to active mode.

[0028] The aforementioned use of a transmitter to wake up a dormant tag chip at a fixed distance involves maintaining a fixed distance between the dormant tag chip and the transmitter. At this distance, the transmitter sends a wake-up signal to the tag chip to wake it up. Since the distance between the transmitter and the tag chip remains constant during this phase, the strength of the wake-up signal received by the tag chip is also fixed.

[0029] S102: During each fixed-distance wake-up process, the wake-up module of the tag chip is used to detect the strength of the wake-up signal; if the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up; if the strength of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up.

[0030] Please refer to Figure 2 , Figure 2 FIG. 1 shows a schematic structural diagram of a tag chip according to this embodiment. Figure 2 As shown, the tag chip includes an analog front end, a first data baseband module and a wake-up module. The wake-up module includes: a second digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module.

[0031] The tag chip described in this embodiment has two wake-up modes, namely a high-sensitivity wake-up mode and a low-sensitivity wake-up mode. Accordingly, the high-sensitivity wake-up mode is implemented by a high-sensitivity wake-up module, and the low-sensitivity wake-up mode is implemented by a low-sensitivity wake-up module.

[0032] When the tag chip is in a dormant state, the tag chip obtains a wake-up signal sent by the transmitter through the second digital baseband module of the wake-up module, and sends the wake-up signal to the energy detection module.

[0033] The energy detection module detects the signal strength of the wake-up signal. In some embodiments, the energy detection module can determine the strength of the wake-up signal by detecting the induced voltage of the wake-up signal. The energy detection module is set with an initial value for the wake-up sensitivity threshold. When the energy detection module detects that the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, it selects the low-sensitivity wake-up mode for wake-up. If the strength of the wake-up signal is less than the current wake-up sensitivity threshold, it selects the high-sensitivity wake-up mode for wake-up.

[0034] Specifically, when the energy detection module detects a wake-up signal strength greater than or equal to the current wake-up sensitivity threshold, it triggers the low-sensitivity wake-up module. Conversely, when the energy detection module detects a wake-up signal strength greater than or equal to the current wake-up sensitivity threshold, it triggers the high-sensitivity wake-up module. The circuit structure of the low-sensitivity wake-up module is generally simpler than that of the high-sensitivity wake-up module. It does not require a low-noise amplifier, automatic gain amplifier, or other modules, and the impedance matching network is also simpler. Therefore, the power consumption of the low-sensitivity wake-up module is generally lower than that of the high-sensitivity wake-up module.

[0035] Below is Figure 3 The low sensitivity wake-up module shown and Figure 4 Taking the high-sensitivity wake-up module shown in the figure as an example, the working principles of the two wake-up modules are explained. Figure 3 As shown, the low-sensitivity wake-up module mainly includes an impedance matching circuit, a demodulation module, a filter, and a comparator. After impedance matching, demodulation, and filtering the received wake-up signal, the low-sensitivity wake-up module inputs the filtered signal into the comparator for comparison with a preset wake-up threshold. If the filtered signal is greater than or equal to the wake-up threshold, the tag chip wakes up and switches from sleep mode to normal operation. The analog front end interacts with the transmitter through the first digital baseband module. If the filtered signal is less than the wake-up threshold, the tag chip remains in sleep mode.

[0036] like Figure 4 As shown, the high-sensitivity wake-up module primarily includes an impedance matching circuit, a low-noise amplifier circuit, a demodulation module, a filter, and a comparator. The module performs impedance matching, low-noise amplification, demodulation, and filtering on the received wake-up signal. The filtered signal is then input into a comparator for comparison with a preset wake-up threshold. If the filtered signal is greater than or equal to the wake-up threshold, the tag chip wakes up and transitions from sleep mode to normal operation. The analog front end interacts with the transmitter via the first digital baseband module. If the filtered signal is less than the wake-up threshold, the tag chip remains in sleep mode.

[0037] S104: If the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased according to the preset threshold update strategy; if the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is reduced according to the preset threshold update strategy.

[0038] In some embodiments, the energy detection module may be pre-configured with multiple wake-up sensitivity threshold levels, arranged in ascending order of wake-up sensitivity threshold. Initially, the energy detection module's initial wake-up sensitivity threshold may be any one of the multiple wake-up sensitivity threshold levels. These wake-up sensitivity threshold levels are associated with corresponding wake-up sensitivity threshold level codes, and the energy detection module may adjust the wake-up sensitivity threshold based on the received wake-up sensitivity threshold level codes.

[0039] During the initialization stage, the second digital baseband module can determine the corresponding wake-up sensitivity threshold gear code based on the wake-up mode and wake-up result feedback from the energy detection module, and send the wake-up sensitivity threshold gear code to the energy detection module so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

[0040] Specifically, if the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the energy detection module selects the low-sensitivity wake-up mode to wake up the tag chip. If the tag chip is successfully awakened in the low-sensitivity wake-up mode, the second digital baseband module, after receiving the wake-up mode and wake-up result feedback from the energy detection module, selects a higher-level wake-up sensitivity threshold gear code and sends it to the energy detection module. After receiving the wake-up sensitivity threshold gear code, the energy detection module increases the wake-up sensitivity threshold by one gear.

[0041] Similarly, if the intensity of the wake-up signal is less than the current wake-up sensitivity threshold, the energy detection module selects the high-sensitivity wake-up mode to wake up the tag chip. If the tag chip is successfully awakened in the high-sensitivity wake-up mode, the second digital baseband module, after receiving the wake-up mode and wake-up result feedback from the energy detection module, selects a lower wake-up sensitivity threshold gear code and sends it to the energy detection module. After receiving the wake-up sensitivity threshold gear code, the energy detection module adjusts the wake-up sensitivity threshold down one gear.

[0042] S106: Repeat the fixed-distance wake-up process until the wake-up sensitivity threshold no longer changes, and use the wake-up sensitivity threshold at this time as the optimal wake-up sensitivity threshold.

[0043] Through multiple rounds of fixed-distance wake-up, the second digital baseband module and the energy detection module will continuously update the wake-up sensitivity threshold until the wake-up sensitivity threshold converges to a certain value. At this time, it can be considered that the wake-up sensitivity threshold no longer changes, and the wake-up sensitivity threshold at this time can be used as the optimal wake-up sensitivity threshold.

[0044] The above is the relevant content of the initialization phase of the tag chip wake-up method based on sensitivity switching described in this embodiment. The following describes the specific content of the use phase of the method, which specifically includes steps S108 to S110.

[0045] S108: Send a wake-up signal to the tag chip via the transmitter.

[0046] Specifically, after determining the optimal wake-up sensitivity threshold during the initialization phase, the tag chip can be placed in a specific application scenario. Usually, in a specific application, the distance between the tag chip and the transmitter must exceed the distance for fixed-distance wake-up.

[0047] S110: The wake-up module of the tag chip selects a corresponding wake-up mode according to the optimal wake-up sensitivity threshold to wake up the tag chip.

[0048] Still Figure 2 Taking the tag chip shown in the figure as an example, when the tag chip is in sleep mode, the tag chip receives the wake-up signal from the transmitter through the wake-up module's second digital baseband module and sends the wake-up signal to the energy detection module. The energy detection module detects the signal strength of the wake-up signal. If the energy detection module detects that the wake-up signal strength is greater than or equal to the current wake-up sensitivity threshold, it selects the low-sensitivity wake-up mode for wake-up. If the wake-up signal strength is less than the current wake-up sensitivity threshold, it selects the high-sensitivity wake-up mode for wake-up.

[0049] Specifically, when the energy detection module detects that the intensity of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, it triggers the low-sensitivity wake-up module to work; otherwise, it triggers the high-sensitivity wake-up module to work.

[0050] Corresponding to the above method, this embodiment also provides a tag chip wake-up device based on sensitivity switching. Figure 5 , Figure 5 A structural diagram of a tag chip wake-up device based on sensitivity switching is exemplarily provided. The device includes a transmitter and a tag chip, and the tag chip includes a wake-up module.

[0051] During the initialization phase: The transmitter is configured to perform multiple rounds of fixed-distance wake-up on the tag chip in the sleep state.

[0052] The tag chip is configured to use the wake-up module to detect the strength of the wake-up signal emitted by the transmitter. If the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up. If the strength of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up. If the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased according to the preset threshold update strategy. If the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is decreased according to the preset threshold update strategy.

[0053] Repeat the above-mentioned updating process of the wake-up sensitivity threshold until the wake-up sensitivity threshold no longer changes, and use the wake-up sensitivity threshold at this time as the optimal wake-up sensitivity threshold.

[0054] During the use phase: The transmitter is configured to send a wake-up signal to the tag chip.

[0055] The tag chip is configured to wake up the tag chip by selecting a corresponding wake-up mode according to an optimal wake-up sensitivity threshold through the wake-up module.

[0056] Still Figure 2 Taking the tag chip shown as an example, the wake-up module includes a second digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module.

[0057] During the initialization phase, the second digital baseband module is configured to receive a wake-up signal from the transmitter, send the wake-up signal to the energy detection module, and adjust the wake-up sensitivity threshold based on the wake-up pattern and wake-up result fed back by the energy detection module. The energy detection module is configured to detect the strength of the wake-up signal and, based on the strength of the wake-up signal and the current wake-up sensitivity threshold, trigger either the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip. Furthermore, the wake-up pattern and wake-up result are fed back to the digital baseband module.

[0058] During the use phase: The digital baseband module is configured to receive the wake-up signal from the transmitter and send the wake-up signal to the energy detection module. The energy detection module is configured to trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip based on the strength of the wake-up signal and the current wake-up sensitivity threshold.

[0059] In some more specific embodiments, multiple wake-up sensitivity threshold gears can be pre-set in the energy detection module, and the multiple wake-up sensitivity threshold gears are arranged from small to large according to the wake-up sensitivity threshold. Initially, the energy detection module can select any one of the wake-up sensitivity threshold gears as the initial wake-up sensitivity threshold.

[0060] During the initialization stage, the second digital baseband module is used to determine the corresponding wake-up sensitivity threshold gear code based on the wake-up mode and wake-up result feedback from the energy detection module, and send the wake-up sensitivity threshold gear code to the energy detection module so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

[0061] Specifically, the second digital baseband module is specifically used to: During the initialization phase, if the wake-up mode fed back by the energy detection module is a low-sensitivity wake-up mode, and the tag chip is successfully awakened in the low-sensitivity wake-up mode, the second digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module increases the wake-up sensitivity threshold by one gear.

[0062] If the wake-up mode fed back by the energy detection module is a high-sensitivity wake-up mode, and the tag chip is successfully awakened in the high-sensitivity wake-up mode, the second digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module adjusts the wake-up sensitivity threshold down by one gear.

[0063] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A tag chip wake-up method based on sensitivity switching, characterized in that: The tag chip includes a wake-up module; the method includes: Initialization stage: Use the transmitter to perform fixed-distance wake-up on the tag chip in the dormant state; in each fixed-distance wake-up process, use the wake-up module of the tag chip to detect the strength of the wake-up signal; if the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, select the low-sensitivity wake-up mode for wake-up; if the strength of the wake-up signal is less than the current wake-up sensitivity threshold, select the high-sensitivity wake-up mode for wake-up; if the tag chip is successfully awakened in the low-sensitivity wake-up mode, increase the wake-up sensitivity threshold according to the preset threshold update strategy; if the tag chip is successfully awakened in the high-sensitivity wake-up mode, reduce the wake-up sensitivity threshold according to the preset threshold update strategy; repeat the fixed-distance wake-up process until the wake-up sensitivity threshold no longer changes, and use the wake-up sensitivity threshold at this time as the optimal wake-up sensitivity threshold; Use phase: the wake-up signal is sent to the tag chip through the transmitter, and the wake-up module of the tag chip selects a corresponding wake-up mode according to the optimal wake-up sensitivity threshold to wake up the tag chip.

2. The method according to claim 1, characterized in that The wake-up module includes: a digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module; During the initialization phase, the digital baseband module is configured to obtain the wake-up signal sent by the transmitter, send the wake-up signal to the energy detection module, and adjust the wake-up sensitivity threshold according to the wake-up mode and wake-up result fed back by the energy detection module; the energy detection module is configured to detect the strength of the wake-up signal, and trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the strength of the wake-up signal and the current wake-up sensitivity threshold; and feed back the wake-up mode and the wake-up result to the digital baseband module; During the usage phase, the digital baseband module is configured to obtain the wake-up signal emitted by the transmitter and send the wake-up signal to the energy detection module; the energy detection module is configured to trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the intensity of the wake-up signal and the current wake-up sensitivity threshold.

3. The method according to claim 2, characterized in that The energy detection module is pre-set with multiple wake-up sensitivity threshold gears, and the multiple wake-up sensitivity threshold gears are arranged from small to large according to the wake-up sensitivity threshold; in the initialization stage, the digital baseband module determines the corresponding wake-up sensitivity threshold gear code according to the wake-up mode and wake-up result feedback from the energy detection module, and sends the wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

4. The method according to claim 3, characterized in that In the initialization stage, if the intensity of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up. If the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased by one level.

5. The method according to claim 3, characterized in that In the initialization stage, if the intensity of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up. If the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is adjusted down one level.

6. A tag chip wake-up device based on sensitivity switching, characterized in that: It includes a transmitter and a tag chip, wherein the tag chip includes a wake-up module; During the initialization phase, the transmitter is configured to perform multiple rounds of fixed-distance wake-up on the tag chip in a dormant state; the tag chip is configured to use the wake-up module to detect the strength of the wake-up signal emitted by the transmitter. If the strength of the wake-up signal is greater than or equal to the current wake-up sensitivity threshold, the low-sensitivity wake-up mode is selected for wake-up; if the strength of the wake-up signal is less than the current wake-up sensitivity threshold, the high-sensitivity wake-up mode is selected for wake-up; if the tag chip is successfully awakened in the low-sensitivity wake-up mode, the wake-up sensitivity threshold is increased according to a preset threshold update strategy; if the tag chip is successfully awakened in the high-sensitivity wake-up mode, the wake-up sensitivity threshold is reduced according to a preset threshold update strategy; the update process of the wake-up sensitivity threshold is repeated until the wake-up sensitivity threshold no longer changes, and the wake-up sensitivity threshold at this time is used as the optimal wake-up sensitivity threshold; During the use phase: the transmitter is configured to send the wake-up signal to the tag chip; the tag chip is configured to wake up the tag chip by selecting a corresponding wake-up mode according to the optimal wake-up sensitivity threshold through the wake-up module.

7. The device according to claim 6, characterized in that The wake-up module includes: a digital baseband module, an energy detection module, a high-sensitivity wake-up module and a low-sensitivity wake-up module; During the initialization phase, the digital baseband module is configured to obtain the wake-up signal sent by the transmitter, send the wake-up signal to the energy detection module, and adjust the wake-up sensitivity threshold according to the wake-up mode and wake-up result fed back by the energy detection module; the energy detection module is configured to detect the strength of the wake-up signal, and trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the strength of the wake-up signal and the current wake-up sensitivity threshold; and feed back the wake-up mode and the wake-up result to the digital baseband module; During the usage phase, the digital baseband module is configured to obtain the wake-up signal emitted by the transmitter and send the wake-up signal to the energy detection module; the energy detection module is configured to trigger the high-sensitivity wake-up module or the low-sensitivity wake-up module to wake up the tag chip according to the intensity of the wake-up signal and the current wake-up sensitivity threshold.

8. The device according to claim 7, characterized in that The energy detection module is pre-set with multiple wake-up sensitivity threshold gears, and the multiple wake-up sensitivity threshold gears are arranged from small to large according to the wake-up sensitivity threshold; in the initialization stage, the digital baseband module is used to determine the corresponding wake-up sensitivity threshold gear code according to the wake-up mode and wake-up result feedback from the energy detection module, and send the wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module updates the wake-up sensitivity threshold according to the wake-up sensitivity threshold gear code.

9. The device according to claim 8, characterized in that The digital baseband module is specifically used for: In the initialization phase, if the wake-up mode fed back by the energy detection module is the low-sensitivity wake-up mode, and the tag chip is successfully awakened in the low-sensitivity wake-up mode, the digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module increases the wake-up sensitivity threshold by one gear.

10. The device according to claim 8, characterized in that The digital baseband module is specifically used for: In the initialization phase, if the wake-up mode fed back by the energy detection module is the high-sensitivity wake-up mode, and the tag chip is successfully awakened in the high-sensitivity wake-up mode, the digital baseband module sends the corresponding wake-up sensitivity threshold gear code to the energy detection module, so that the energy detection module adjusts the wake-up sensitivity threshold down by one gear.

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