Integrated presentation tool and control method

Abstract

This invention provides an integrated presentation tool and control method, belonging to the technical field of presentation auxiliary equipment. The tool includes a main unit, a ring-type page turner, and a flip-type magnetic USB flash drive module. The main unit integrates a microphone module, a main control circuit board, a main battery, a wireless charging transmitter module, and a detachable 2.4G wireless receiver, and can be used as a lavalier microphone. The ring-type page turner integrates a capacitive touch strip, a linear motor, a ring control chip, and a Bluetooth module. It can be worn on a finger and communicates with external terminals via Bluetooth. When stored in the main unit, it can be recharged via the wireless charging module. The flip-type magnetic USB flash drive module is hinged to the back of the main unit via a hinge, achieving both secure attachment and pop-out use through a magnetic structure. When attached, it functions as a lavalier clip. This invention integrates microphone pickup, page turning, storage functions, and intelligent control into one compact and portable design, suitable for various presentation scenarios such as teaching and business presentations.

Description

Technical Field

[0001] This invention relates to the field of demonstration auxiliary equipment technology, specifically to a demonstration auxiliary device that integrates sound pickup, page turning control and data storage functions, and its communication and control method. Background Technology

[0002] In classroom teaching, business presentations, and public demonstrations, data storage devices, audio pickup devices, and page-turning control devices are commonly used presentation aids. Currently, these three types of devices are mostly independent products, requiring users to carry multiple devices simultaneously, which presents problems such as inconvenience and the risk of loss or misplacement.

[0003] Specifically, standalone USB flash drives are small and easy to forget on terminal devices after use, posing a risk of loss or damage from external forces; traditional pen-style page turners require continuous hand-holding, occupying hand space and affecting gesture expression and blackboard operation during presentations; among existing audio pickup devices, wired models restrict the user's range of motion, while wireless handheld models also occupy the hand, and ear clip-on models have limited wearing comfort and poor fit for different users.

[0004] Currently, the market for demonstration aids is dominated by standalone products with single functions, lacking devices that integrate multiple demonstration aid functions into a single hardware structure, thus failing to meet the demands for portability and integrated use. Furthermore, integrating multiple independent functions into a single device also raises the following new technical issues: First, the problem of channel resource contention and mutual interference when multiple wireless communication links (2.4G audio transmission and Bluetooth page turning control) are working simultaneously within the integrated device; Second, given the hardware constraints of the small payload (≤32 bytes per packet) of 2.4G RF modules such as nRF24L01, how to achieve real-time, low-latency, and high-quality audio transmission within a limited bandwidth; Third, when ring-type touch input devices are worn on fingers, differences in the humidity of the user's fingers, temperature drift, and slight displacement of the fingers can cause capacitive touch signals to drift, affecting the accuracy and consistency of gesture recognition. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated demonstration tool and control method. Through the integrated design of the hardware structure, the functions of sound pickup, page turning control, and data storage are integrated into one. At the same time, through adaptive audio encoding and adaptive touch recognition technology, the technical problems of limited bandwidth and low touch recognition accuracy after integration are solved.

[0006] To achieve the aforementioned technical features, the present invention aims to provide an integrated presentation tool, comprising a host, a ring-type page turner, and a flip-type magnetic USB flash drive module. The host contains a microphone module and a main control circuit board. The back of the host has a flip-type magnetic USB flash drive module that can rotate around an axis and a second magnet. The flip-type magnetic USB flash drive module includes a USB flash drive body, a hinge, and a first magnet. The USB flash drive body is hinged to the back of the host via the hinge. The first magnet and the second magnet are positioned correspondingly to provide magnetic attraction when the USB flash drive body is attached to the back of the host.

[0007] Preferably, the ring-type page turner includes a ring housing, a capacitive touch strip, a linear motor, a ring battery, and a ring control chip; the front of the main unit is provided with an annular storage groove, in which the ring-type page turner can be fitted and stored; the capacitive touch strip is disposed on the outer side of the ring housing, the linear motor and the ring control chip are both disposed inside the ring housing, and the ring battery is disposed inside the ring housing and supplies power to the ring-type page turner; the capacitive touch strip and the linear motor are both electrically connected to the ring control chip.

[0008] Preferably, the ring-type page turner is further provided with a Bluetooth module, which is electrically connected to the ring control chip; the ring control chip has a built-in adaptive weighted filtering circuit and a multi-threshold finite state machine logic circuit, the input of the adaptive weighted filtering circuit is electrically connected to the capacitive touch strip, and the output of the multi-threshold finite state machine logic circuit is electrically connected to the Bluetooth module.

[0009] Preferably, the main unit is further provided with a main battery and a wireless charging transmitter module, and the ring-shaped page turner is provided with a wireless charging receiver module; when the ring-shaped page turner is stored on the main unit, the wireless charging transmitter module and the wireless charging receiver module are positioned correspondingly, and the main battery supplies power to the ring battery through the wireless charging transmitter module and the wireless charging receiver module.

[0010] Preferably, the host also includes a 2.4G wireless receiver and a microphone transmitting circuit; the 2.4G wireless receiver is detachably embedded inside the host, and the microphone module is electrically connected to the microphone transmitting circuit; the main control circuit board has a built-in adaptive differential coding circuit, the input of which is electrically connected to the microphone module, and the output of which is electrically connected to the microphone transmitting circuit.

[0011] Preferably, the USB flash drive body can rotate 90° outward around the axis, and after rotation, the USB flash drive interface faces the outside of the host; when the USB flash drive body rotates to fit against the back of the host, the USB flash drive body constitutes the back clip part of the host's collar structure.

[0012] Preferably, the capacitive touch strip is a strip-shaped touch sensing electrode, the linear motor is a flat vibration motor, and the linear motor is electrically connected to the capacitive touch strip in a one-to-one correspondence.

[0013] Preferably, the side of the host is provided with a volume up button, a volume down button, a microphone power switch, and a charging interface, and the volume up button, volume down button, microphone power switch, and charging interface are all electrically connected to the main control circuit board.

[0014] Preferably, the main unit is provided with a magnetic positioning structure, and the ring-type page turner is provided with a corresponding magnetic component. When the ring-type page turner is stored in the main unit, it is positioned and fixed by magnetic force.

[0015] Corresponding to the above-described device, the present invention also provides a control method, including an audio adaptive transmission step and a touch gesture recognition step: The audio adaptive transmission steps are as follows: acquire the audio signal output by the microphone module and divide it into continuous signal frames, calculate the adjacent sampling difference amplitude within the current signal frame, adaptively select the encoding bit width according to the difference amplitude interval, perform differential pulse encoding on the sampling difference and then frame it, and send it to the external terminal through the 2.4G wireless link. The touch gesture recognition steps are as follows: collect the touch sampling sequence of the capacitive touch bar, adaptively select the filter window size according to the rate of change of the sampled value, perform weighted filtering processing, determine the gesture type through a multi-threshold finite state machine, and encode the recognition result into a Bluetooth command to send to an external terminal.

[0016] The present invention has the following beneficial effects: 1. This invention integrates the sound pickup module, page turning control component, and data storage component into a single-volume device through hardware structure, replacing multiple independent devices, reducing the number of items to carry, and lowering the probability of loss or misplacement.

[0017] 2. This invention adopts a ring-type page-turning control structure, which can be worn on the finger without continuous hand holding, freeing up hand operation space; the flip-type magnetic USB flash drive module can be used as a lavalier clip or back clip when in the attached state, making it a dual-purpose device and reducing the overall size.

[0018] 3. This invention employs an adaptive coding bit width circuit and method based on signal frame differential amplitude analysis. On a 2.4G RF module with limited single packet effective payload, it achieves a dynamic balance between increasing the number of sampling points in the audio steady segment and maintaining high-precision coding in the audio intense segment, taking into account the latency, bandwidth utilization and sound quality of real-time audio transmission.

[0019] 4. This invention adopts a touch recognition architecture that combines an adaptive weighted filtering circuit with a multi-threshold finite state machine logic circuit. It dynamically adjusts the size of the filtering window and compensates for signal drift caused by temperature, humidity and finger differences. It has high recognition accuracy for multiple gesture types and can run in real time on a low-power embedded processor.

[0020] 5. The main unit of this invention has a built-in main battery that can simultaneously power the microphone module and wirelessly charge it when the ring-type page turner is stored, eliminating the need for separate charging devices for each component and improving ease of use.

[0021] 6. The ring-shaped page turner of this invention can be stored in the groove on the front of the main unit and fixed by magnetic attraction. The USB flash drive module is fixed by magnetic attraction. The 2.4G wireless receiver can be embedded inside the main unit. All components are stably stored and easy to carry as a whole. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the host unit of the present invention in the state of the USB flash drive popping out and rotating.

[0025] Figure 3 This is a schematic diagram of the structure of the host unit of the present invention with the USB flash drive attached.

[0026] Figure 4 This is a circuit structure block diagram of the ring-type page turner of the present invention.

[0027] Figure 5 This is a circuit structure block diagram of the host of the present invention.

[0028] In the diagram: 1-Main unit; 11-Microphone module; 13-Main battery; 14-Wireless charging transmitter module; 15-2.4G wireless receiver; 16-Microphone transmitting circuit; 17-Microphone power switch; 18-Volume up button; 19-Volume down button; 2-Ring-type page turner; 22-Capacitive touch bar; 23-Linear motor; 24-Ring battery; 25-Ring control chip; 26-Bluetooth module; 27-Wireless charging receiver module; 3-Flip magnetic USB flash drive module; 31-USB flash drive body; 32-Hinge; 5-First magnet; 51-Second magnet; 6-Charging interface. Detailed Implementation

[0029] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] Example 1: like Figures 1 to 5As shown, an integrated presentation tool includes a host 1, a ring-type page turner 2, and a flip-type magnetic USB flash drive module 3.

[0031] 1. Host 1 Structure The main unit 1 is a long, flat shell, internally housing a microphone module 11, a main control circuit board, a main battery 13, a wireless charging transmitter module 14, a 2.4G wireless receiver 15, and a microphone transmitting circuit 16. The microphone module 11 is electrically connected to the microphone transmitting circuit 16, and the microphone transmitting circuit 16 is paired with the 2.4G wireless receiver 15 to establish a wireless audio transmission path. The 2.4G wireless receiver 15 can be plugged into an external terminal to amplify audio. The main unit 1 has a volume up button 18, a volume down button 19, a microphone power switch 17, and a charging port 6 on its side. The main unit 1 can be used as a lapel clip to be attached to a user's collar.

[0032] 2. Flip-type magnetic USB flash drive module 3 structure The back of the host 1 is equipped with a flip-type magnetic USB flash drive module 3 that can rotate around an axis. The flip-type magnetic USB flash drive module 3 includes a USB flash drive body 31, a rotating shaft 32, and a first magnet 5. The USB flash drive body 31 is hinged to the back of the host 1 via the rotating shaft 32 and can rotate around the rotating shaft 32 within a range of 0° to 90°.

[0033] Structural fit: When the USB flash drive body 31 is rotated to fit against the back of the host 1, the first magnet 5 and the second magnet 51 attract each other magnetically, making the USB flash drive body 31 firmly attached to the back of the host 1. At this time, the USB flash drive body 31 forms the back clip part of the collar clip structure, and the host 1 can be clipped to the collar. When the USB flash drive is needed, the USB flash drive body 31 can be rotated outwards for use as a USB flash drive to connect to an external terminal. After use, the USB flash drive body 31 is rotated back to the fitted position, and the first magnet 5 and the second magnet 51 are re-attached and fixed.

[0034] 3. Ring-type page turner 2 structure The ring-type page turner 2 has a ring-shaped structure, including a ring housing, a capacitive touch strip 22, a linear motor 23, a ring battery 24, a ring control chip 25, and a Bluetooth module 26. The capacitive touch strip 22 is located on the outer side of the ring housing, while the linear motor 23, ring battery 24, ring control chip 25, and Bluetooth module 26 are all located inside the ring housing. The capacitive touch strip 22, linear motor 23, and Bluetooth module 26 are all electrically connected to the ring control chip 25, and the ring battery 24 supplies power to each electrical component.

[0035] Structural configuration: The ring-type page turner 2 can be worn on the finger, the capacitive touch strip 22 is used to receive touch input, the linear motor 23 is used to provide vibration feedback, and the Bluetooth module 26 is used to establish a wireless communication connection with an external terminal to realize page turning control.

[0036] 4. Integrated charging structure The main unit 1 houses a main battery 13 and a wireless charging transmitter module 14, while the ring-shaped page turner 2 houses a wireless charging receiver module 27. The main unit 1 features a magnetic positioning structure; when the ring-shaped page turner 2 returns to its original position, it is magnetically attached and fixed to a preset position on the main unit 1. After the ring-shaped page turner 2 returns to its original position, the wireless charging transmitter module 14 and the wireless charging receiver module 27 align, and the main battery 13 charges the ring battery 24 through the wireless charging transmitter module 14 and the wireless charging receiver module 27. The main battery 13 also powers the microphone module 11, forming a unified power supply system.

[0037] The overall usage process of an integrated presentation tool: Before use, remove the 2.4G wireless receiver 15 from the host 1 and insert it into the external terminal. Remove the ring-type page turner 2 from the host 1 and wear it on your finger. Then rotate the USB flash drive body 31 90° and insert it into the external terminal for data transmission. After use, rotate the USB flash drive body 31 back to the fitting position. The host 1 is clipped to the collar by the magnetic structure. Turn on the power switch of the host 1 to use the sound pickup function for speeches or teaching.

[0038] Example 2: This embodiment is a basic configuration with core functional circuitry. The specific selection and structure of each hardware component are as follows: The main unit 1 is a long, flat ABS shell with overall dimensions of 60mm × 20mm × 10mm. The main control circuit board inside the main unit 1 uses an STM32F103C8T6 main control chip as the core control carrier, and the chip integrates an adaptive differential coding circuit. The microphone module 11 uses an INMP441 omnidirectional MEMS microphone, which is soldered to the front of the main control circuit board, and the pickup hole is located on the front face of the main unit 1.

[0039] The hinge 32 on the back of the host 1 is a stainless steel pin with a diameter of 2mm. The USB flash drive body 31 is a USB 2.0 flash drive module equipped with Samsung KLUDG4U1EA-B0C1 type storage chip, and the flash drive interface is a Type-A interface. The first magnet 5 and the second magnet 51 are both N35 type neodymium iron boron magnets with a size of 5mm×3mm×1mm, which are respectively embedded in the corresponding grooves on the inside of the flash drive body 31 and the back of the host 1.

[0040] The ring-type page turner 2 has a ring-shaped shell made of PC material, with an inner diameter adapted to the size of an adult's finger; the ring control chip 25 uses an nRF52832 Bluetooth main control chip, which integrates an adaptive weighted filtering circuit and a multi-threshold finite state machine logic circuit; the capacitive touch bar 22 uses a TTP223 capacitive touch sensing module, which is attached to the outer side of the ring shell; the linear motor 23 uses a 0832 flat vibration motor, which is embedded inside the ring shell; the ring battery 24 uses a 301012 polymer lithium battery with a rated capacity of 30mAh.

[0041] The main battery 13 inside the host 1 is a 502030 polymer lithium battery with a rated capacity of 250mAh; the wireless charging transmitter module 14 uses an IP6806 wireless charging transmitter chip, and the wireless charging receiver module 27 uses an IP6826 wireless charging receiver chip. The two are positioned correspondingly below the groove on the front of the host 1 and inside the ring shell.

[0042] The 2.4G wireless receiver 15 uses an nRF24L01 type 2.4G wireless module, which can be detachably embedded in the storage slot on the side of the main unit 1; the microphone transmitting circuit 16 uses an RF transmitting circuit that matches the 2.4G wireless receiver 15 and is integrated on the main control circuit board.

[0043] The volume up button 18, volume down button 19, and microphone power switch 17 on the side of the main unit 1 are all touch buttons. The charging port 6 uses a Micro-USB interface. All of the above components are electrically connected to the corresponding pins of the main control circuit board via wires.

[0044] The annular storage groove on the front of the main unit 1 is 4mm deep and 3mm wide, and the ring-type page turner 2 can be completely fitted into the groove; the groove is fitted with a magnetic positioning magnet, which corresponds to the magnetic part on the inside of the ring shell, so as to achieve magnetic fixation in the storage state.

[0045] Example 3: This embodiment upgrades the power supply components and core chip based on embodiment 2 to improve battery life. The specific structure is as follows: The main battery 13 inside the main unit 1 is replaced with a 503048 polymer lithium battery, with the rated capacity increased to 750mAh; the ring battery 24 is replaced with a 401220 polymer lithium battery, with the rated capacity increased to 80mAh, and the thickness of the ring shell is increased by 1mm accordingly.

[0046] The main control chip on the main control circuit board was replaced with an STM32L432KC low-power main control chip, which integrates an adaptive differential encoding circuit with the same architecture. The ring control chip 25 was replaced with an nRF52810 low-power Bluetooth chip, which integrates an adaptive weighted filtering circuit and a finite state machine logic circuit with the same architecture to reduce power consumption in standby and working states.

[0047] The wireless charging transmitter module 14 has been replaced with an IP6808 5W wireless charging transmitter chip, and the wireless charging receiver module 27 has been replaced with a corresponding IP6828 receiver chip, thereby improving the power and efficiency of wireless charging and shortening the charging time.

[0048] Microphone module 11 was replaced with an SPM1423HM4H-B low-power MEMS microphone, which reduces power consumption while maintaining sound pickup performance.

[0049] The structure, connection relationship and installation position of the remaining components are consistent with those of Example 2.

[0050] Example 4: This embodiment is a portable configuration with reduced size, optimizing hardware selection and structural dimensions for portable scenarios, as detailed below: The overall dimensions of the main unit 1 have been reduced to 45mm × 15mm × 8mm, and the casing is made of aluminum alloy to ensure structural strength. The main control circuit board uses the CH573F single-chip that integrates Bluetooth and control functions, and integrates an adaptive differential coding circuit to reduce the space occupied by the circuit board.

[0051] The microphone module 11 uses the SPM0423LE5-HB-1 miniature MEMS microphone, which is only 4mm in diameter and is installed at the front of the host 1; the 2.4G wireless receiver 15 uses the more integrated nRF24L01+ mini module, and the storage slot size is correspondingly reduced.

[0052] The flip-type magnetic USB flash drive module 3 uses a USB 3.1 Gen1 micro USB flash drive module 31 as its main body 31, and uses a Longsys FORESEX P1000 embedded storage chip for storage. The hinge 32 uses a copper pin with a diameter of 1.5mm, which reduces the overall size of the USB flash drive module.

[0053] The ring-type page turner 2 has a ring shell made of thin-walled PC material, with a thickness reduced to 2mm; the ring control chip 25 is an nRF52805 microchip with integrated touch function, which integrates an adaptive weighted filter circuit and a finite state machine logic circuit; the linear motor 23 is a 0615 type micro flat motor; and the ring battery 24 is a 250810 type micro polymer lithium battery with a rated capacity of 15mAh.

[0054] The size of the ring-shaped storage groove on the front of the main unit 1 has been reduced accordingly, with a depth of 3mm and a ring width of 2.5mm, to fit the reduced size of the ring-type page turner 2.

[0055] The connection relationships and structural settings of the remaining components are consistent with those of Embodiment 2.

[0056] Example 5: This embodiment expands the interface configuration based on embodiment 2 to improve device adaptability. The specific structure is as follows: The flip-type magnetic USB flash drive module 3 has a dual-interface USB flash drive structure, with both a Type-A USB flash drive interface and a Type-C USB flash drive interface. The two interfaces are located at opposite ends of the USB flash drive body 31. The rotating shaft 32 is located in the middle of the USB flash drive body 31. After the USB flash drive body 31 rotates around the rotating shaft 32, the corresponding interface can be extended outward.

[0057] The charging port 6 on the side of the main unit 1 has been replaced with a Type-C interface, which supports reversible plugging and unplugging; the main control circuit board integrates a USB-C interface control circuit, which supports multiplexing of charging and data transmission.

[0058] The capacitive touch bar 22 of the ring-type page turner 2 uses a long strip-shaped fully bonded touch electrode that covers half of the outer side of the ring housing, improving the recognition range of touch operation; the linear motor 23 uses two 0832 type flat vibration motors, which are symmetrically arranged inside the ring housing to improve the perception of vibration feedback.

[0059] The wireless charging transmitter module 14 inside the main unit 1 is equipped with two sets of transmitting coils, which correspond to the two storage directions of the ring-type page turner, respectively, to improve the adaptability of storage and charging; the wireless charging receiver module 27 is equipped with a corresponding receiving coil.

[0060] The selection, connection relationship and installation position of the remaining components are consistent with those in Example 2.

[0061] Example 6: This embodiment illustrates the specific implementation process of the adaptive encoding and transmission method for 2.4G real-time audio, based on the hardware structure described in Embodiment 2.

[0062] The main control circuit board performs analog-to-digital conversion on the analog audio signal output from the microphone module at a sampling frequency of 16kHz to obtain a 16-bit digital audio sampling sequence. The 20 sampling points collected every 1.25ms are divided into a signal frame, and adjacent signal frames do not overlap.

[0063] For the 20 16-bit sample values ​​S[0] to S

[19] in the current signal frame, take the high 12 bits as the effective value, and calculate the adjacent sample difference sequence Δ[i] = S[i] - S[i-1], i = 1, 2, ..., 19. Calculate the maximum absolute value Δmax of the difference sequence, and adaptively select the encoding mode accordingly. When Δmax≤16, it is determined to be a silent or stable segment, and the first encoding mode is selected with an encoding bit width of 4 bits; When 16 < Δmax ≤ 256, it is determined to be a normal speech segment, and the second encoding mode is selected with an encoding bit width of 8 bits; When Δmax>256, it is determined to be a peak or burst segment, and the third encoding mode is selected with an encoding bit width of 12 bits.

[0064] Each Δ[i] is truncated with a selected encoding width, and four consecutive encoding differences are combined into an atomic encoding unit, which has a structure of 1 byte header + N bytes of difference data. The first encoding mode occupies 3 bytes per atomic unit, the second encoding mode occupies 5 bytes, and the third encoding mode occupies 7 bytes.

[0065] The payload packet has a capacity of 28 bytes. The first encoding mode accommodates 9 atomic units (36 sample differences), the second encoding mode accommodates 5 atomic units (20 sample differences), and the third encoding mode accommodates 4 atomic units (16 sample differences). In the third encoding mode, the last 3 sample differences are filled with zero values, and the corresponding sample points are reconstructed by linear extrapolation from the decoding end. The payload packet begins with the original 12-bit value of the first sample point S[0] of the current frame as the decoding reference value and encoding mode identifier.

[0066] The superframe period is 1.25ms, which matches the duration of the signal frame. A superframe contains three time slots: the first time slot carries the audio payload packet; the second time slot carries the signaling packet; and the third time slot carries the redundancy packet, which contains the first sample value S[0], the last sample value S[N-1], and the encoding mode identifier of the payload packet of the previous superframe.

[0067] After receiving the superframe, the 2.4G wireless receiver parses the encoded difference in the payload packet according to the encoding mode identifier. Starting from the decoding reference value S[0], it accumulates the difference point by point to recover the 12-bit sampling sequence, shifts it left by 4 bits to expand it into a 16-bit sampling value output. If packet loss is detected, it checks the first and last sampling point data of the lost frame in the redundant packet, and uses it as the endpoint to reconstruct the sampling points of the lost frame by equidistant linear interpolation.

[0068] If more than 3 frames are lost consecutively, the 2.4G wireless receiver sends a degradation request through the next superframe signaling packet. After receiving the request, the main control board will force the encoding mode of the subsequent superframe to the first encoding mode (4-bit width) until the packet loss rate returns to the normal range.

[0069] Embodiment 7: This embodiment describes the specific implementation process of the touch gesture recognition method, which is implemented based on the hardware structure described in Embodiment 2.

[0070] The ring control chip continuously collects the raw capacitance variation values of the capacitive touch strip at a sampling frequency of 200Hz to form a touch sampling sequence.

[0071] Environmental Baseline Calibration At each power-on startup, the ring control chip continuously collects 50 capacitance values in the non-touch state, and takes the average value as the initial environmental baseline value C_baseline. During operation, a capacitance value is collected every 1 second when no touch is confirmed, and the baseline value is updated by exponential moving average with an attenuation factor α=0.05: C_baseline=(1-α)×C_baseline+α×C_new. The touch determination threshold is obtained by compensating the environmental baseline value with an offset coefficient k_base=1.2: touch determination threshold=k_base×C_baseline, so as to automatically compensate for the influences of different users and changes in temperature and humidity.

[0072] Adaptive Weighted Filtering Before gesture recognition, adaptive weighted filtering processing is performed on the touch sampling sequence: Step 1: Calculate the change rate of adjacent sampling values V=|C[t]-C[t-1]| / Δt, where Δt is the sampling interval.

[0073] Step 2: Adaptively select the filtering window size N according to V —— select the large window N_large=12 when V<V_low; select the small window N_small=4 when V>V_high; select the medium window N_medium=8 when V_low≤V≤V_high; where V_low=5 ADC units / sampling interval, V_high=20 ADC units / sampling interval.

[0074] Step 3: Calculate the arithmetic mean value C_mean of N consecutive sampling values in the window.

[0075] Step 4: Calculate the absolute deviation d[i]=|C[i]-C_mean| of each sampling value C[i] from C_mean.

[0076] Step 5: Assign a weight w[i]=1 / (d[i]+ε) to each sampling value, where ε=1, so that the sampling points with larger deviations have lower weights.

[0077] Step 6: Calculate the weighted average value C_filtered=Σ(w[i]×C[i]) / Σ(w[i]) as the filtering output at the current moment.

[0078] Step 7: Move the sliding window forward by one sampling point and repeat the above steps to achieve real-time continuous filtering.

[0079] Multi-threshold finite state machine gesture recognition The filtered data input contains a multi-threshold finite state machine with five states for gesture category determination: S_IDLE (idle state), S_TOUCH (touch detection state), S_SWIPE (swipe direction determination state), S_CONFIRM (gesture confirmation state), and S_OUTPUT (command output state).

[0080] The state transition rules are as follows: 1. Idle → Touch Detection: If the filtered capacitance value C_filtered is greater than the touch judgment threshold and two consecutive sampling points meet the threshold, record the touch start time T_start and the start coordinate.

[0081] 2. Touch detection → Swipe direction determination: If the cumulative displacement D_total exceeds the displacement threshold D_threshold and the touch duration is less than the long press time threshold T_long, record the swipe direction angle. If the absolute value of the Y-axis displacement component is greater than that of the X-axis component, it is determined to be a primary Y-axis swipe.

[0082] 3. Touch detection → Gesture confirmation: The single-click path is when the touch duration is less than T_short and D_total is released before it exceeds the displacement threshold. If the time since the last single-click release is less than the double-click interval threshold T_dbl, it is determined as a double-click; otherwise, it is a single-click. The long-press path is when the touch duration is greater than or equal to T_long and D_total is not exceeded.

[0083] 4. Swipe Direction Determination → Gesture Confirmation: After the finger is released, the swipe direction is determined based on the recorded Y-axis swipe direction. If the positive displacement of the Y-axis exceeds the positive threshold, it is determined as an upward swipe gesture. If the absolute value of the negative displacement of the Y-axis exceeds the negative threshold, it is determined as a downward swipe gesture. If the displacement is insufficient, the swipe is discarded and the user returns to idle.

[0084] 5. Gesture Confirmation → Command Output: When the confirmed gesture type is valid and does not violate the minimum interval or other restrictions, the ring control chip encodes the gesture type into a 1-byte Bluetooth data frame and sends it to the external terminal.

[0085] 6. In any non-idle state, if no state transition occurs for more than 1 second, the system will automatically return to the idle state and discard the current gesture sequence.

[0086] The above description is only a preferred embodiment of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An integrated presentation tool, characterized in that, It includes a main unit (1), a ring-type page turner (2), and a flip-type magnetic USB flash drive module (3). The host (1) is equipped with a microphone module (11) and a main control circuit board. The back of the host (1) is equipped with a flip-type magnetic USB flash drive module (3) that can rotate around the axis and a second magnet (51). The flip-type magnetic USB flash drive module (3) includes a USB flash drive body (31), a rotating shaft (32) and a first magnet (5). The USB flash drive body (31) is hinged to the back of the host (1) through the rotating shaft (32). The first magnet (5) and the second magnet (51) are positioned to provide magnetic attraction when the USB flash drive body (31) is attached to the back of the host (1).

2. The integrated presentation tool according to claim 1, characterized in that, The ring-type page turner (2) includes a ring housing, a capacitive touch bar (22), a linear motor (23), a ring battery (24), and a ring control chip (25). The front of the main unit (1) is provided with an annular storage groove, and the ring-type page turner (2) can be fitted and stored in the annular storage groove. The capacitive touch bar (22) is located on the outer side of the ring housing, the linear motor (23) and the ring control chip (25) are both located inside the ring housing, and the ring battery (24) is located inside the ring housing and provides power to the ring page turner (2); The capacitive touch bar (22) and the linear motor (23) are both electrically connected to the ring control chip (25).

3. The integrated presentation tool according to claim 2, characterized in that, The ring-type page turner (2) is also equipped with a Bluetooth module (26), which is electrically connected to the ring control chip (25). The ring control chip (25) has an adaptive weighted filter circuit and a multi-threshold finite state machine logic circuit built in. The input of the adaptive weighted filter circuit is electrically connected to the capacitive touch bar (22), and the output of the multi-threshold finite state machine logic circuit is electrically connected to the Bluetooth module (26).

4. The integrated presentation tool according to claim 1, characterized in that, The host (1) is also equipped with a main battery (13) and a wireless charging transmitter module (14), and the ring-type page turner (2) is equipped with a wireless charging receiver module (27). When the ring-type page turner (2) is stored on the host (1), the wireless charging transmitter module (14) and the wireless charging receiver module (27) are positioned in the same position, and the main battery (13) supplies power to the ring battery (24) through the wireless charging transmitter module (14) and the wireless charging receiver module (27).

5. An integrated presentation tool according to claim 1, characterized in that, The host (1) is also equipped with a 2.4G wireless receiver (15) and a microphone transmitting circuit (16). The 2.4G wireless receiver (15) is detachably embedded inside the host (1), and the microphone module (11) is electrically connected to the microphone transmitting circuit (16). The main control circuit board has a built-in adaptive differential coding circuit, the input end of which is electrically connected to the microphone module (11), and the output end is electrically connected to the microphone transmitting circuit (16).

6. The integrated presentation tool according to claim 1, characterized in that, The USB flash drive body (31) can rotate outward by 90° around the pivot (32), and after rotation, the USB flash drive interface faces the outside of the host (1); when the USB flash drive body (31) rotates to fit against the back of the host (1), the USB flash drive body (31) constitutes the back clip part of the host (1) collar clip structure.

7. An integrated presentation tool according to claim 2, characterized in that, The capacitive touch strip (22) is a strip-shaped touch sensing electrode, and the linear motor (23) is a flat vibration motor. The linear motor (23) and the capacitive touch strip (22) are electrically connected in a one-to-one correspondence.

8. An integrated presentation tool according to claim 1, characterized in that, The main unit (1) is provided with a volume up button (18), a volume down button (19), a microphone power switch (17) and a charging interface (6) on its side. The volume up button (18), the volume down button (19), the microphone power switch (17) and the charging interface (6) are all electrically connected to the main control circuit board.

9. An integrated presentation tool according to claim 1, characterized in that, The host (1) is equipped with a magnetic positioning structure, and the ring-type page turner (2) is equipped with a corresponding magnetic component. When the ring-type page turner (2) is stored in the host (1), it is positioned and fixed by magnetic force.

10. A control method for the integrated demonstration tool according to any one of claims 1-9, characterized in that, This includes the audio adaptive transmission step and the touch gesture recognition step: The audio adaptive transmission steps are as follows: acquire the audio signal output by the microphone module and divide it into continuous signal frames, calculate the adjacent sampling difference amplitude within the current signal frame, adaptively select the encoding bit width according to the difference amplitude interval, perform differential pulse encoding on the sampling difference and then frame it, and send it to the external terminal through the 2.4G wireless link. The touch gesture recognition steps are as follows: collect the touch sampling sequence of the capacitive touch bar, adaptively select the filter window size according to the rate of change of the sampled value, perform weighted filtering processing, determine the gesture type through a multi-threshold finite state machine, and encode the recognition result into a Bluetooth command to send to an external terminal.

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