Finger wearable PPT projection control method based on flexible sensor

Abstract

The invention discloses a finger wearable PPT projection control method based on a flexible sensor, and belongs to the field of multimedia control. The implementation method comprises the steps that a flexible sensor and a textile fabric are combined to prepare a flexible fingerstall; a voltage acquisition module and an analog-to-digital conversion module in the flexible sensor acquire the resistance value change of an action acquisition module in real time so as to keep continuous monitoring of finger actions and wait for gesture activation of a user; the semiconductor module and the Bluetooth transmission module are in an intelligent dormant state; after the semiconductor module and the Bluetooth transmission module are activated, the upward or downward bending action of a finger is accurately identified according to the resistance value change acquired by the action acquisition module, so that the page turning requirement of a user is determined; the page turning requirement of the user is sent to a terminal through a transmission module, and page turning up and down are formed for the PPT; and entering a dynamic dormancy judgment state after page turning, judging whether to enter an intelligent dormancy state or not according to the change of the strain value within a certain time, and realizing finger wearable PPT projection control according to a state judgment result.

Description

Technical Field

[0001] The invention belongs to the field of multimedia control, and in particular relates to a finger-wearable PPT projection control method based on a flexible sensor. Background Art

[0002] In various situations such as reporting and teaching, people usually use PPT with narration for presentation, which includes various pictures and texts to improve the audience's understanding and interest. In this process, since the PPT needs to be switched, it often involves a mouse or remote control, but both of them require hand-holding or extra actions to complete the PPT switching, which reduces the fluency of the whole process. Summary of the invention

[0003] The purpose of the present invention is to provide a finger-wearable PPT projection control method based on a flexible sensor, which collects finger bending through strain gauges and follows natural finger movements to control the page turning of the PPT, aiming to free the speaker's hands and improve the fluency of the entire presentation process.

[0004] In order to solve the above problems, the present application provides the following technical solutions to achieve them.

[0005] The present invention discloses a finger-wearable PPT projection control method based on a flexible sensor, comprising the following steps:

[0006] Step 1: Combine the flexible sensor and the textile to prepare a flexible finger sleeve; the flexible sensor includes a switch module, a constant current source module, a motion acquisition module, a voltage acquisition module, an analog-to-digital conversion module, a semiconductor module and a Bluetooth transmission module;

[0007] Step 2: The voltage acquisition module and the analog-to-digital conversion module in the flexible sensor collect the resistance value change of the motion acquisition module in real time to maintain continuous monitoring of the finger movements and wait for the user's gesture activation; the semiconductor module and the Bluetooth transmission module are in an intelligent dormant state;

[0008] Step 3: After activating the semiconductor module and the Bluetooth transmission module, accurately identify the upward or downward bending action of the finger according to the change of the resistance value collected by the action collection module, so as to determine the user's page turning demand;

[0009] Step 4: The user's page turning demand is sent to the terminal through the transmission module, so that the PPT page is turned up and down;

[0010] Step 5. After turning the page, enter the dynamic sleep judgment state, and judge whether to enter the intelligent sleep state based on the change of resistance value within a certain period of time. If it enters the sleep state, repeat steps 3 to 5. If it does not enter the sleep state, repeat steps 4 to 5 to realize the finger-wearable PPT projection control based on flexible sensors.

[0011] Further,

[0012] The switch module is used to turn the main power on and off;

[0013] The constant current source module is used to provide voltage to each module of the entire sensor;

[0014] The motion acquisition module is used to detect the bending of fingers;

[0015] The voltage acquisition module is used to detect the change in voltage caused by the resistance of the strain gauge;

[0016] The analog-to-digital conversion module is used to convert the detected analog signal into a digital signal;

[0017] The semiconductor module is used to compare the collected voltage value with a threshold value and determine whether to transmit a signal and the content of the transmission;

[0018] The Bluetooth transmission module is used to transmit digital signals to the terminal.

[0019] Furthermore, the activation method of step three is:

[0020] S21. Capturing the bending changes of fingers through the motion acquisition module;

[0021] S22. When the finger bends more than 90° and the strain gauge voltage is greater than the threshold V1, a time T is reserved;

[0022] S23. Within time T, the second finger bending greater than 60° occurs and the strain gauge voltage is greater than the threshold V2, activating the control state.

[0023] Furthermore, in step 3, the specific steps of determining the user's page turning requirement include:

[0024] S31 defines the initial voltage and threshold V3;

[0025] S32. The voltage is collected every T seconds, and the voltage collected at the current time t is subtracted from the voltage collected at the time (t-1), and the absolute value of the difference is compared with the threshold value V3;

[0026] S33. When the absolute value is greater than the threshold and the difference is positive, turn the page up; when the absolute value is greater than the threshold and the difference is negative, turn the page down.

[0027] Furthermore, in step 5, the specific steps of determining whether to enter the intelligent sleep state include:

[0028] S51. Collect the voltage after the page is turned up and down in step 4, and make a judgment at the same time: subtract the voltage collected at the current moment from the voltage collected at the previous moment, and compare the absolute value of the difference with the threshold value V3;

[0029] S52. Within t2 seconds after the completion of the page turning, when the absolute value is greater than the threshold value V3 and the difference is positive, the page is turned up; when the absolute value is greater than the threshold value and the difference is negative, the page is turned down, and the cycle continues from S2;

[0030] S53. Otherwise, it enters the intelligent sleep state and waits to be activated again.

[0031] Furthermore, in step S22, the strain gauge voltage is compared with the threshold value V1, and the specific implementation method is: the voltage acquisition module acquires the voltage, the analog signal is converted into a digital signal through the analog-to-digital conversion module, and the converted voltage value is compared with the threshold value V1.

[0032] Beneficial effects:

[0033] 1. The present invention discloses a finger-wearable PPT projection control method based on a flexible sensor. The flexible sensor and textile are combined to prepare a flexible finger sleeve. The natural bending movement of the finger is collected by action, and the page turning of the PPT is controlled by following the natural finger movement. In addition, by adding intelligent sleep and threshold, it is ensured that normal movement will not cause the PPT page turning and achieve energy saving effect. The present invention is easy to wear, can free the speaker's hands, and improve the overall fluency of the speech.

[0034] 2. The present invention discloses a finger-wearable PPT projection control method based on a flexible sensor, which captures the finger bending changes through a motion acquisition module; when the finger bends more than 90° and the strain gauge voltage is greater than a threshold value V1, a time T is reserved; within the time T, the second finger bends more than 60° and the strain gauge voltage is greater than a threshold value V2, and the control state is activated, thereby realizing precise control of the activated control state.

[0035] 3. The present invention discloses a finger-wearable PPT projection control method based on a flexible sensor. The flexible sensor includes a switch module, a constant current source module, a motion acquisition module, a voltage acquisition module, an analog-to-digital conversion module, a semiconductor module and a Bluetooth transmission module. The motion acquisition module changes its resistance as the bending of the finger changes, and the change of the motion acquisition module is acquired by the voltage acquisition module. The analog-to-digital conversion module converts the acquired voltage data, the semiconductor module calculates the voltage data and determines whether to transmit it, and the Bluetooth transmission module is used to transmit control information to the terminal, so as to realize finger-wearable long-distance PPT projection control. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a schematic flow chart of a finger-wearable PPT projection control method based on a flexible sensor.

[0037] Figure 2The present invention is an algorithm flow chart of a finger-wearable PPT projection control method based on a flexible sensor.

[0038] Figure 3 It is a structural schematic diagram of a PPT projection control system based on a flexible sensor in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following embodiments are described clearly in conjunction with the drawings in the examples of the present invention. The following embodiments are only part of the implementation methods of the present invention. Those skilled in the art can make various corresponding changes and deformations based on the concept of the present invention without paying any creative work, and all these changes and deformations should fall within the protection scope of the present invention.

[0040] like Figure 1 As shown, the present embodiment discloses a finger-wearable PPT projection control method based on a flexible sensor, and the specific implementation steps are as follows:

[0041] Step 1: Combine the flexible sensor and the textile to prepare a flexible finger sleeve; the flexible sensor includes a switch module, a constant current source module, a motion acquisition module, a voltage acquisition module, a semiconductor module and a Bluetooth transmission module;

[0042] Step 2: The voltage acquisition module and the analog-to-digital conversion module in the flexible sensor collect the resistance value change of the motion acquisition module in real time to maintain continuous monitoring of the finger movements and wait for the user's gesture activation; the semiconductor module and the Bluetooth transmission module are in an intelligent dormant state;

[0043] Step 3: After activation, according to the change of the resistance value collected by the motion collection module, the upward or downward bending action of the finger is accurately identified, thereby determining the user's page turning needs;

[0044] Step 4: The user's page turning demand is sent to the terminal through the transmission module, so that the PPT page is turned up and down;

[0045] Step 5. After turning the page, enter the dynamic sleep judgment state. The change of the resistance value within a certain period of time is used to determine whether it has entered the intelligent sleep state. If it has entered the sleep state, repeat steps 3 to 5. If it has not entered the sleep state, repeat steps 4 to 5.

[0046] The intelligent dormant state means that the control device continuously scans and obtains the bending degree of the fingers, and does not transmit any information to the terminal via the Bluetooth device, so that the speaker can use hand movements freely.

[0047] In a specific embodiment, the activation method in step 3 includes:

[0048] S21. Capturing the bending changes of fingers through the motion acquisition module;

[0049] S22. When the finger bends more than 90° and the strain gauge voltage is greater than the threshold V1, a time T is reserved;

[0050] S23. Within time T, the second finger bending greater than 60° occurs and the strain gauge voltage is greater than the threshold V2, activating the control state.

[0051] The bending changes of the finger are captured, and the resistance of the strain gauge changes according to the different bending degrees of the strain gauge. The voltage change of the strain gauge is collected, and the measurement value each time is U f , the previous measurement value is U b , ΔU is the difference between the two, which is used as an indicator to describe the degree of finger bending. When ΔU is greater than the threshold V1, it means that activation is required; to prevent unintentional actions, it is used as a filter and verified again. When ΔU is greater than the threshold V2 again, the control state is activated.

[0052] In a specific embodiment, in step three, the step of determining the user's page turning requirement includes:

[0053] S31 defines the initial voltage and threshold V3;

[0054] S32. The voltage is collected every T seconds, and the voltage collected at the current time t is subtracted from the voltage collected at the time (t-1), and the absolute value of the difference is compared with the threshold value V3;

[0055] S33. When the absolute value is greater than the threshold and the difference is positive, turn the page up; when the absolute value is greater than the threshold and the difference is negative, turn the page down.

[0056] In a specific embodiment, in step 4, the sending to the terminal through the transmission module is specifically implemented by: sending the control command to the terminal through the Bluetooth transmission module to achieve page turning of the PPT.

[0057] In a specific embodiment, in step 5, the step of determining whether to enter the intelligent sleep state includes:

[0058] S51. Collect the voltage after the page is turned up and down in step 4, and make a judgment at the same time: subtract the voltage collected at the current moment from the voltage collected at the previous moment, and compare the absolute value of the difference with the threshold value V3;

[0059] S52. Within t2 seconds after the completion of the page turning, when the absolute value is greater than the threshold value V3 and the difference is positive, the page is turned up; when the absolute value is greater than the threshold value and the difference is negative, the page is turned down, and the cycle continues from S2;

[0060] S53. Otherwise, it enters the intelligent sleep state and waits to be activated again.

[0061] In a specific embodiment, in step S22, the strain gauge voltage is compared with the threshold value V1, and its specific implementation method includes: the voltage acquisition module acquires the voltage, the analog signal is converted into a digital signal through the analog-to-digital conversion module, and the converted voltage value is compared with the threshold value V1.

[0062] refer to Figure 2 , an algorithm flow chart of a finger-wearable PPT projection control method based on a flexible sensor, from a sleep state to a control state and then to a sleep state, this set of cycles, as the basic control algorithm of the present invention, realizes the control of turning pages of the PPT according to the needs of the speaker.

[0063] In a specific embodiment, reference Figure 3 , a structural diagram of a PPT projection control system based on flexible sensors, the motion acquisition module changes its resistance following the bending changes of the finger, the changes of the motion acquisition module are acquired through the voltage acquisition module, the analog-to-digital conversion module converts the acquired voltage data, the data processing module calculates the voltage data and determines whether to transmit it, and the Bluetooth transmission module is used to transmit control information to the terminal.

[0064] The above is an explanation of the present invention and should not be considered as limiting it. For those skilled in the art, it is obvious that the present invention is not limited to the above examples, which are all exemplary examples. Therefore, modifications made without departing from the basic innovation or other features of the present invention are included in the scope of the present invention defined by the claims.

Claims

1. A finger-wearable PPT projection control method based on flexible sensors, characterized in that: The following steps are included: Step 1: Combine the flexible sensor and the textile to prepare a flexible finger sleeve; the flexible sensor includes a switch module, a constant current source module, a motion acquisition module, a voltage acquisition module, an analog-to-digital conversion module, a semiconductor module and a Bluetooth transmission module; Step 2: The voltage acquisition module and the analog-to-digital conversion module in the flexible sensor collect the resistance value change of the motion acquisition module in real time to maintain continuous monitoring of the finger movements and wait for the user's gesture activation; the semiconductor module and the Bluetooth transmission module are in an intelligent dormant state; Step 3: After activating the semiconductor module and the Bluetooth transmission module, accurately identify the upward or downward bending action of the finger according to the change of the resistance value collected by the action collection module, so as to determine the user's page turning demand; Step 4: The user's page turning demand is sent to the terminal through the transmission module, so that the PPT page is turned up and down; Step 5. After turning the page, enter the dynamic sleep judgment state, and judge whether to enter the intelligent sleep state based on the change of resistance value within a certain period of time. If it enters the sleep state, repeat steps 3 to 5. If it does not enter the sleep state, repeat steps 4 to 5 to realize the finger-wearable PPT projection control based on flexible sensors.

2. A finger-wearable PPT projection control method based on a flexible sensor as claimed in claim 1, characterized in that: The switch module is used to turn the main power on and off; The constant current source module is used to provide voltage to each module of the entire sensor; The motion acquisition module is used to detect the bending of fingers; The voltage acquisition module is used to detect the change in voltage caused by the resistance of the strain gauge; The analog-to-digital conversion module is used to convert the detected analog signal into a digital signal; The semiconductor module is used to compare the collected voltage value with a threshold value and determine whether to transmit a signal and the content of the transmission; The Bluetooth transmission module is used to transmit digital signals to the terminal.

3. A finger-wearable PPT projection control method based on a flexible sensor as claimed in claim 1, characterized in that: The activation method for step three is: S21. Capturing the bending changes of fingers through the motion acquisition module; S22. When the finger bends more than 90° and the strain gauge voltage is greater than the threshold V1, a time T is reserved; S23. Within time T, the second finger bending greater than 60° occurs and the strain gauge voltage is greater than the threshold V2, activating the control state.

4. A finger-wearable PPT projection control method based on a flexible sensor as claimed in claim 1, characterized in that: In step 3, the specific steps of determining the user's page turning requirement include: S31 defines the initial voltage and threshold V3; S32. The voltage is collected every T seconds, and the voltage collected at the current time t is subtracted from the voltage collected at the time (t-1), and the absolute value of the difference is compared with the threshold value V3; S33. When the absolute value is greater than the threshold and the difference is positive, turn the page up; when the absolute value is greater than the threshold and the difference is negative, turn the page down.

5. The finger-wearable PPT projection control method based on a flexible sensor as claimed in claim 1, characterized in that: In step 5, the specific steps of determining whether to enter the intelligent sleep state include: S51. Collect the voltage after the page is turned up and down in step 4, and make a judgment at the same time: the voltage collected at the current moment is subtracted from the voltage collected at the previous moment, and the absolute value of the difference is compared with the threshold value V3; S52. Within t2 seconds after the completion of the page turning, when the absolute value is greater than the threshold value V3 and the difference is positive, the page is turned up; when the absolute value is greater than the threshold value and the difference is negative, the page is turned down, and the cycle continues from S2; S53. Otherwise, it enters the intelligent sleep state and waits to be activated again.

6. A finger-wearable PPT projection control method based on a flexible sensor as claimed in claim 3, characterized in that: In step S22, the strain gauge voltage is compared with the threshold value V1, and the specific implementation method is: the voltage acquisition module acquires the voltage, the analog signal is converted into a digital signal through the analog-to-digital conversion module, and the converted voltage value is compared with the threshold value V1.

Images