Intelligent interactive projection platform and method based on wall painting and 3D digits

Abstract

The invention discloses an intelligent interactive projection platform and method based on wall painting and 3D (three-dimensional) digits, belongs to the field of interactive projection platforms, and aims to improve the calculation of capacitance fluctuation under different humidities according to the inductive reactance effect of the humidity on a capacitive sensor and overcome the deemption of the different humidities on the capacitance fluctuation. The capacitance fluctuation condition of the capacitive sensor is calculated according to the fluctuation condition of the capacitance value during reasonable operation of the previous capacitive sensor and the humidity variation at different time points by applying a previous numerical value method, so that the health condition of the capacitive sensor is determined according to the fluctuation condition of the capacitance value under different humidity, and the determination accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of interactive projection platforms, and in particular relates to an intelligent interactive projection platform and method based on wall painting and 3D numbers. Background Art

[0002] Wall projection interactive technology can be customized and developed according to the actual needs of the exhibition hall to meet the needs of various display scenarios. In addition, wall projection interactive technology can be updated and upgraded at any time to adapt to market changes and developments.

[0003] In terms of intelligent interactive projection based on wall painting and 3D numbers, the existing technical solution such as patent publication number "CN118688384A" is often used to achieve it, which includes a capacitive sensor, MCU, CPU and 3D projection device located on the wall painting that are serially communicated and connected. The capacitive sensor is used to send the capacitance value to the MCU after a finger collision, and the MCU is used to transmit the capacitance value to the CPU. The CPU is used to derive an output projection image signal to the 3D projection device based on the capacitance value. The 3D projection device is used to project a 3D image to a preset position on the wall based on the projection image signal, thereby achieving intelligent wall interactive projection on the wall painting.

[0004] In the prior art solution, the healthy operating performance of the capacitive sensor is very important, so it is necessary to perform an evaluation based on its own parameters and environmental parameters. However, the current accuracy of the healthy operating performance evaluation of the capacitive sensor is not enough. Summary of the invention

[0005] In order to solve the defects in the prior art, the present invention proposes an intelligent interactive projection platform and method based on wall painting and 3D numbers. According to the effect of humidity on the inductive reactance of the capacitive sensor, the calculation of the fluctuation of the capacitance value under different humidity is improved, and the influence of different humidity on the fluctuation of the capacitance value is overcome; the method of using past numerical values ​​is used to calculate the fluctuation of the capacitance value of the capacitive sensor according to the fluctuation of the capacitance value when the capacitive sensor is operating reasonably in the past and the change of humidity at different time points, so that the health status of the capacitive sensor is determined according to the fluctuation of the capacitance value under different humidity, thereby improving the accuracy of the determination.

[0006] The present invention uses the following technical solutions.

[0007] A control method of an intelligent interactive projection platform based on wall painting and 3D numbers, comprising:

[0008] After the finger collides with the capacitive sensor, the capacitance value is sent to the MCU, and the MCU transmits the capacitance value to the CPU. The CPU derives the output projection image signal to the 3D projection device based on the capacitance value. The 3D projection device projects the 3D image to the preset position on the wall based on the projection image signal, thus achieving the intelligent wall interactive projection on the wall painting.

[0009] The power sensor samples the power of the capacitor sensor and transmits it to the MCU, and the humidity sensor samples the humidity value of the environment where the capacitor sensor is located and transmits it to the MCU;

[0010] The control method of the intelligent interactive projection platform based on wall painting and 3D numbers also includes:

[0011] Step 1: Obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity conditions during the operation of realizing the intelligent wall interactive projection on the wall painting;

[0012] Step 2: Calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation. When the capacitance fluctuation of each capacitance value is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of possible abnormal fluctuation under the current humidity is calculated;

[0013] Step 3: Obtain the capacitance fluctuation frequency of the capacitance sensor under its reasonable operating humidity conditions in the past, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the correlation between the subtrahend frequency and humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard.

[0014] Furthermore, in Step 1, several samplings are performed under a humidity condition, and several capacitance values ​​and their corresponding power values ​​are obtained, so that the MCU obtains the capacitance value queue and power value queue of the capacitance sensor to be evaluated under a random humidity, which are arranged in the order of sampling time points.

[0015] Further, in Step 2, the capacitance fluctuation can be the amount obtained by subtracting corresponding capacitance values ​​in a pair of adjacent capacitance value queues under humidity, or the amount obtained by subtracting each capacitance value in the capacitance value queue of the next humidity from the capacitance value average.

[0016] Furthermore, in Step 2, the calculation equation for the fluctuation of capacitance value is determined to be:

[0017]

[0018] Here, Represents the tth capacitance value in the capacitance value queue when the humidity is u1, represents the tth capacitance value in the capacitance value queue when the humidity is u0, x u1 It is the fluctuation critical amount.

[0019] Furthermore, in Step 2, the method for obtaining the fluctuation critical amount includes:

[0020] Initially, obtaining the capacitance value data of the capacitance sensor during reasonable operation in the past, and calculating the capacitance value fluctuation value during reasonable operation;

[0021] Then, the power value average of the current humidity and the humidity change between the current humidity and the previous humidity adjacent to it are obtained.

[0022] Furthermore, in Step 2, the change in humidity is calculated;

[0023] Then, the current humidity fluctuation critical value is obtained according to the capacitance fluctuation value, humidity change amount and power value average.

[0024] Furthermore, the method for calculating the humidity change includes: subtracting the humidity decrease from the current humidity to obtain the humidity decrease, and obtaining the quotient of the humidity decrease divided by the current humidity as the humidity change.

[0025] Furthermore, the equation for the fluctuation critical amount is: u1 =η*e ufn *J u1 +x; here, x u1 is the critical fluctuation amount when the humidity is u1, e ufn represents the humidity change between humidity u1 and humidity u0, J u1 Represents the average power value when the humidity is u1, x represents the capacitance fluctuation value of the capacitance sensor when it is operating reasonably in the past, and η represents the humidity coefficient of the capacitance sensor.

[0026] Furthermore, the operational equation for the capacitance fluctuation is:

[0027]

[0028] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained at the jth time, y j-1 Represents the capacitance value obtained for the j-1th time.

[0029] Furthermore, the operational equation for the capacitance fluctuation is:

[0030]

[0031] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained for the jth time, and ν represents the average capacitance value obtained for the pth time.

[0032] Furthermore, the operational equation for the capacitance fluctuation is:

[0033]

[0034] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, n represents the highest reduction level, and x k represents the capacitance fluctuation obtained by the k-th level reduction, yj represents the capacitance value obtained for the jth time, y j-k represents the capacitance value obtained for the jkth time, p k represents the total number of decrement values ​​of the k-th level decrement, p k =pk, where p is the total frequency of the capacitance values ​​obtained by the capacitance sensor during reasonable operation in the past; here, the total frequency of obtaining capacitance values ​​is the same as the total number of capacitance values.

[0035] An intelligent interactive projection platform based on wall painting and 3D numbers, including:

[0036] The capacitive sensor, MCU, CPU and 3D projection device on the wall painting are connected in sequence. The capacitive sensor is used to send the capacitance value to the MCU after the finger hits it. The MCU is used to send the capacitance value to the CPU. The CPU is used to derive the output projection image signal to the 3D projection device according to the capacitance value. The 3D projection device is used to project the 3D image to a preset position on the wall according to the projection image signal, so as to achieve intelligent wall interactive projection on the wall painting.

[0037] In addition, the power sensor and humidity sensor are both connected to the MCU. The power sensor is used to sample the power of the capacitive sensor and transmit it to the MCU. The humidity sensor is used to sample the humidity value of the environment where the capacitive sensor is located and transmit it to the MCU.

[0038] The intelligent interactive projection platform based on wall painting and 3D digital also includes:

[0039] An acquisition module, which is used to obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity during the operation of realizing the intelligent wall interactive projection on the wall painting;

[0040] A calculation module, which is used to calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation, when each capacitance value fluctuation is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of the possible abnormal fluctuation under the current humidity is summed up;

[0041] The evaluation module is used to obtain the capacitance fluctuation frequency of the capacitance sensor under its reasonable operating humidity conditions in the past, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the coherence between the subtrahend frequency and the humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard.

[0042] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0043] Compared with the current healthy operation performance evaluation of capacitive sensors, under the condition of instantly obtaining and analyzing each type of value formed by the capacitive sensor during operation, the capacitance fluctuation value and capacitance fluctuation frequency of the past capacitive sensors in the actual environment are also involved to obtain the fluctuation critical amount and coherence of the capacitive sensor. That is, the present invention is based on the analysis of past values, and combines the evaluation with the specific operating environment, which reduces unnecessary evaluation frequency and evaluation costs, thereby efficiently detecting hidden health defects or anomalies and ensuring the accuracy and efficiency of the evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a flow chart of a control method of an intelligent interactive projection platform based on wall painting and 3D numbers described in the present invention;

[0045] Figure 2 It is a partial structural diagram of the intelligent interactive projection platform based on wall painting and 3D numbers described in the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely express the technical solution of the present invention. The embodiments expressed in this application are only some embodiments of the present invention, not all embodiments. According to the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0047] like Figure 1 As shown, the control method of the intelligent interactive projection platform based on wall painting and 3D numbers described in the present invention includes:

[0048] After the finger collides with the capacitive sensor, the capacitance value is sent to the MCU, and the MCU transmits the capacitance value to the CPU. The CPU derives the output projection image signal to the 3D projection device based on the capacitance value. The 3D projection device projects the 3D image to the preset position on the wall based on the projection image signal, thus achieving the intelligent wall interactive projection on the wall painting.

[0049] The power sensor samples the power of the capacitor sensor and transmits it to the MCU, and the humidity sensor samples the humidity value of the environment where the capacitor sensor is located and transmits it to the MCU;

[0050] The control method of the intelligent interactive projection platform based on wall painting and 3D numbers also includes:

[0051] Step 1: Obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity conditions during the operation of realizing the intelligent wall interactive projection on the wall painting;

[0052] In a preferred but non-limiting embodiment of the present invention, in Step 1, the capacitance value and power value of the capacitive sensor to be evaluated at different humidity during operation are obtained according to the defined sampling speed (that is, how many times a second the sample is taken). Here, the humidity value of the environment where the capacitive sensor is located is relatively constant, and changes from time to time. Several samplings can be performed under a humidity condition, and several capacitance values ​​and their corresponding power values ​​are obtained. In this way, the MCU obtains the capacitance value queue and power value queue of the capacitive sensor to be evaluated at any humidity, which are arranged in the order of sampling time points.

[0053] Because the sampling speed of power value and capacitance value is related to the change speed of humidity, the sampling frequency of capacitance value and power value under different humidity in this application remains the same; the sampling frequency here defines a value, which can be ten, twenty or thirty.

[0054] When evaluating the healthy operating performance of a capacitive sensor, the key is to evaluate the operating conditions of the capacitive sensor under different humidity conditions. If the capacitive sensor can operate reasonably under different humidity conditions, it means that the health of the capacitive sensor is not defective. When the humidity value of the environment in which the capacitive sensor is located increases, the inductive reactance of the capacitive sensor changes with the humidity change, thereby causing the capacitance value to change. If the humidity change at a certain point in time is large, then the change in inductive reactance is also large, thereby causing the capacitance value to fluctuate significantly. Therefore, in this application, by obtaining the power value and capacitance value of the capacitive sensor to be evaluated under different humidity conditions, it is convenient to subsequently analyze the capacitance value fluctuation of the capacitive sensor.

[0055] Step 2: Calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation. When the capacitance fluctuation of each capacitance value is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of possible abnormal fluctuation under the current humidity is calculated;

[0056] In a preferred but non-restrictive embodiment of the present invention, in Step 2, the capacitance value fluctuation can be the amount obtained by subtracting the corresponding capacitance values ​​in a pair of adjacent capacitance value queues under humidity (that is, the queue sequence number is the same), or the amount obtained by subtracting each capacitance value in the capacitance value queue of the next humidity from the capacitance value average (the capacitance value average is the average of all capacitance values ​​in the capacitance value queue of the previous humidity).

[0057] In a preferred but non-limiting embodiment of the present invention, in Step 2, the calculation equation for determining the fluctuation of the capacitance value is:

[0058]

[0059] Here, Represents the tth capacitance value in the capacitance value queue when the humidity is u1, represents the tth capacitance value in the capacitance value queue when the humidity is u0, x u1 It is the fluctuation critical amount.

[0060] In a preferred but non-limiting embodiment of the present invention, in Step 2, here, because the fluctuation state of the capacitive sensor under different humidity conditions varies very complicatedly, in order to improve the accuracy of possible abnormal fluctuations, the fluctuation critical amount in the present application is obtained by matching, and the method for obtaining the fluctuation critical amount includes:

[0061] Initially, the capacitance value data of the previous capacitance sensor during reasonable operation is obtained, and the capacitance value fluctuation value during reasonable operation is calculated; the previous capacitance sensor in this application uses the same capacitance sensor model as the capacitance sensor to be evaluated; the environment during reasonable operation here is a normal humidity environment.

[0062] Then, the power value average of the current humidity and the humidity change between the current humidity and the previous humidity adjacent to it are obtained.

[0063] In a preferred but non-limiting embodiment of the present invention, in Step 2, the change in humidity is calculated;

[0064] In a preferred but non-limiting embodiment of the present invention, the method for calculating the change in humidity includes: subtracting the previous humidity (i.e., the humidity before the change) from the current humidity to obtain the humidity reduction, and obtaining the quotient obtained by dividing the humidity reduction by the current humidity as the humidity change.

[0065] The reason for calculating the humidity change is that when evaluating the healthy operating performance of the capacitor sensor, the key is to evaluate the operating conditions of the capacitor sensor under different humidity. If the capacitor sensor can operate reasonably under different humidity, it means that the health of the capacitor sensor is not defective. When the humidity value of the environment where the capacitor sensor is located increases, the inductive reactance of the capacitor sensor changes with the humidity change, thereby causing the capacitance value to change. If the humidity change at a certain point in time is large, then the change in inductive reactance is also large, thereby causing the capacitance value to fluctuate greatly. Such sudden fluctuations do not mean that the health of the capacitor sensor is unsatisfactory. Therefore, the fluctuation of the capacitance value under different changes is calculated based on the humidity change.

[0066] Then, the current humidity fluctuation critical value is obtained according to the capacitance fluctuation value, humidity change amount and power value average.

[0067] In a preferred but non-limiting embodiment of the present invention, the equation for the fluctuation threshold is: u1 =η*e ufn *J u1 +x; here, x u1 is the critical fluctuation amount when the humidity is u1, e ufn represents the humidity change between humidity u1 and humidity u0, J u1 Represents the average power value when the humidity is u1, x represents the capacitance fluctuation value of the previous capacitance sensor during reasonable operation, η represents the humidity coefficient of the capacitance sensor; here represents the effect coefficient of humidity change on the change of inductive reactance of the capacitance sensor, the humidity coefficient of the capacitance sensor multiplied by the humidity change reflects the change of inductive reactance, and the change of inductive reactance multiplied by the power value reflects the change of capacitance value caused by humidity change.

[0068] The above fluctuation threshold is based on the fluctuation of capacitance under reasonable conditions and the humidity variation of the humidity of the environment where the capacitance sensor is located. The fluctuation threshold of capacitance under different humidity variations is defined. When the humidity variation is known, if the fluctuation of capacitance is higher than the fluctuation threshold, it is considered that the capacitance value is abnormally fluctuating. If the fluctuation of capacitance is lower than the threshold, it is considered that the capacitance value is in a reasonable range and will not cause adverse effects on the health of the capacitance sensor. Therefore, the setting of the fluctuation threshold can be flexibly configured to match the change of humidity in the environment where the capacitance sensor is located. The capacitance fluctuation value of the previous capacitance sensor during reasonable operation can be used for calibration to determine a more appropriate threshold.

[0069] The above capacitance fluctuation values ​​are obtained by using the capacitance sensor several times to obtain the capacitance values ​​of the capacitance sensor when it was operating properly in the past.

[0070] In a preferred but non-limiting embodiment of the present invention, the operational equation for the capacitance fluctuation value is:

[0071]

[0072] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained at the jth time, y j-1 Represents the capacitance value obtained for the j-1th time.

[0073] In a preferred but non-limiting embodiment of the present invention, the operational equation for the capacitance fluctuation value is:

[0074]

[0075] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained for the jth time, and ν represents the average capacitance value obtained for the pth time.

[0076] In a preferred but non-limiting embodiment of the present invention, because in the above manner, when calculating the capacitance fluctuation value, it only involves the change of the capacitance value in sequence, and does not involve the overall change of the capacitance value; or it only involves the overall change of the capacitance value, and does not involve the change of the capacitance value in sequence. Therefore, in this application, not only the overall change of the capacitance value is involved, but also the local change of the capacitance value (sequential change), that is, the calculation equation of the capacitance fluctuation value is:

[0077]

[0078] Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, n represents the highest reduction level, and x k represents the capacitance fluctuation obtained by the k-th level reduction, yj represents the capacitance value obtained for the jth time, y j-k represents the capacitance value obtained for the jkth time, p k represents the total number of decrement values ​​of the k-th level decrement, p k =pk, where p is the total frequency of the capacitance values ​​obtained by the capacitance sensor during reasonable operation in the past; here, the total frequency of obtaining capacitance values ​​is the same as the total number of capacitance values.

[0079] As, when k = 1, At this time, it is the average of the reduction values ​​obtained by subtracting the next capacitance value from the previous capacitance value in the total capacitance values ​​obtained by the previous capacitance sensor during reasonable operation, that is, the average of all first-level reductions is regarded as the capacitance value fluctuation obtained by the first-level reduction; when k=2, the average of all second-level reductions is regarded as the capacitance value fluctuation obtained by the second-level reduction.

[0080] Step 3: Obtain the capacitance fluctuation frequency of the previous capacitance sensor under humidity conditions that are not detrimental to its normal operation, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the correlation between the subtrahend frequency and humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard (that is, there is no problem with the healthy operation of the capacitance sensor).

[0081] The capacitance fluctuation frequency in this application is based on the method of determining the abnormal frequency of the capacitance value of the capacitance sensor under different humidity in Step 2, and the capacitance fluctuation frequency of the capacitance value of the capacitance sensor when it is operating reasonably under humidity conditions that are not detrimental to its reasonable operation in the past is accumulated.

[0082] The coherence in this application is the KL divergence.

[0083] Here, the lower the correlation between humidity and capacitance fluctuation frequency, the lower the effect of humidity changes on capacitance fluctuation frequency, and the higher the stability of the capacitance sensor under different humidity. Therefore, when the correlation is lower than the defined critical value, it is considered that the capacitance sensor health performance evaluation meets the standard and the capacitance sensor is operating correctly. Otherwise, the capacitance sensor does not meet the standard and the maintenance personnel must be informed immediately to repair the capacitance sensor.

[0084] The value of the critical amount defined above may be one-half.

[0085] When the capacitor sensor is in good health, it can operate reasonably under different humidity conditions, and the fluctuation frequency of the capacitance value under different humidity conditions is close to the frequency of reasonable capacitance value fluctuations. When the capacitor sensor is in poor health, the fluctuation frequency of the capacitance value increases with the increase of humidity. The increase in the fluctuation frequency of the capacitance value means that the capacitor sensor does not operate smoothly under high humidity conditions and its health is poor.

[0086] The present invention improves the calculation of capacitance fluctuations under different humidity conditions based on the effect of humidity on the inductive reactance of the capacitance sensor, thereby overcoming the influence of different humidity on capacitance fluctuations; by using the method of past numerical values, the capacitance fluctuation of the capacitance sensor is calculated based on the capacitance fluctuation conditions when the capacitance sensor is operating reasonably in the past and the change of humidity at different time points, thereby determining the health status of the capacitance sensor based on the capacitance fluctuation conditions under different humidity conditions, thereby improving the accuracy of determination.

[0087] like Figure 2 As shown, the intelligent interactive projection platform based on wall painting and 3D numbers described in the present invention includes:

[0088] The capacitive sensor, MCU, CPU and 3D projection device on the wall painting are connected in sequence. The capacitive sensor is used to send the capacitance value to the MCU after the finger hits it. The MCU is used to send the capacitance value to the CPU. The CPU is used to derive the output projection image signal to the 3D projection device according to the capacitance value. The 3D projection device is used to project the 3D image to a preset position on the wall according to the projection image signal, so as to achieve intelligent wall interactive projection on the wall painting.

[0089] In addition, the power sensor and humidity sensor are both connected to the MCU. The power sensor is used to sample the power of the capacitive sensor and transmit it to the MCU. The humidity sensor is used to sample the humidity value of the environment where the capacitive sensor is located and transmit it to the MCU.

[0090] The intelligent interactive projection platform based on wall painting and 3D digital also includes:

[0091] An acquisition module, which is used to obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity during the operation of realizing the intelligent wall interactive projection on the wall painting;

[0092] A calculation module, which is used to calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation, when each capacitance value fluctuation is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of the possible abnormal fluctuation under the current humidity is summed up;

[0093] The evaluation module is used to obtain the capacitance fluctuation frequency of the capacitance sensor under its reasonable operating humidity conditions in the past, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the coherence between the subtrahend frequency and the humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard.

[0094] The beneficial effects of the present invention are that, compared with the prior art, the technical effects of the present invention include:

[0095] Compared with the current healthy operation performance evaluation of capacitive sensors, under the condition of instantly obtaining and analyzing each type of value formed by the capacitive sensor during operation, the capacitance fluctuation value and capacitance fluctuation frequency of the past capacitive sensors in the actual environment are also involved to obtain the fluctuation critical amount and coherence of the capacitive sensor. That is, the present invention is based on the analysis of past values, and combines the evaluation with the specific operating environment, which reduces unnecessary evaluation frequency and evaluation costs, thereby efficiently detecting hidden health defects or anomalies and ensuring the accuracy and efficiency of the evaluation.

[0096] The present disclosure can be a system, method and / or computer program product. The computer program product can include a computer-readable backup medium carrying computer-readable program instructions for causing a processor to implement various aspects of the disclosure.

[0097] The computer readable backup medium can be a tangible network capable of retaining and backing up the instructions used by the instruction execution network. The computer readable backup medium can be, but is not limited to, an electrical backup network, a magnetic backup network, an optical backup network, an electromagnetic backup network, a semiconductor backup network, or any suitable combination of the above. Further examples of computer readable backup media (non-exhaustive list) include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (HD-ROM), digital versatile disk (DXD), memory stick, floppy disk, mechanically encoded network, such as punch cards or protrusions in grooves with instructions backed up thereon, and any suitable combination of the above. The computer readable backup medium used herein is not to be construed as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a power line cable), or an electrical signal transmitted through wires.

[0098] The computer readable program instructions expressed herein can be downloaded from the computer readable backup medium to each inference / processing grid line, or downloaded to an external computer or external backup grid line through a wireless network, such as the Internet, a local area network, a wide area network and / or a wireless network. The wireless network can include copper transmission cables, power transmission lines, wireless transmission, routers, firewalls, switches, gateway computers and / or edge service devices. The wireless network adapter card or wireless network interface in each inference / processing grid line receives the computer readable program instructions from the wireless network and forwards the computer readable program instructions for storage in the computer readable backup medium in each inference / processing grid line.

[0099] The computer program instructions for performing the operations of the present disclosure can be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, conditional setting values, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Sdaletal A, H++, etc., and conventional procedural programming languages ​​such as "H" language or similar programming languages. The computer-readable program instructions can be executed entirely on the client computer, partially on the client computer, as a separate software package, partially on the client computer and partially on the remote computer, or completely on the remote computer or server. In the case of a remote computer, the remote computer can be connected to the client computer through any other wireless network, including a local area network (LAb) or a wide area network (WAb), or can be connected to an external computer (just like using an Internet service provider to connect through the Internet). In some embodiments, the electronic circuit is customized by using the status values ​​of computer-readable program instructions, such as a programmable logic circuit, a field programmable gate array (FPGA) or a programmable logic array (PLA), and the electronic circuit can execute computer-readable program instructions to achieve various aspects of the overhead disclosure.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not deviate from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A control method for an intelligent interactive projection platform based on wall painting and 3D numbers, characterized in that: include: After the finger collides with the capacitive sensor, the capacitance value is sent to the MCU, and the MCU transmits the capacitance value to the CPU. The CPU derives the output projection image signal to the 3D projection device based on the capacitance value. The 3D projection device projects the 3D image to the preset position on the wall based on the projection image signal, thus achieving the intelligent wall interactive projection on the wall painting. The power sensor samples the power of the capacitor sensor and transmits it to the MCU, and the humidity sensor samples the humidity value of the environment where the capacitor sensor is located and transmits it to the MCU; The control method of the intelligent interactive projection platform based on wall painting and 3D numbers also includes: Step 1: Obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity conditions during the operation of realizing the intelligent wall interactive projection on the wall painting; Step 2: Calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation. When the capacitance fluctuation of each capacitance value is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of possible abnormal fluctuation under the current humidity is calculated; Step 3: Obtain the capacitance fluctuation frequency of the capacitance sensor under its reasonable operating humidity conditions in the past, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the correlation between the subtrahend frequency and humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard.

2. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 1 is characterized in that: In Step 1, several samplings are performed under a humidity condition, and several capacitance values ​​and their corresponding power values ​​are obtained, so that the MCU obtains the capacitance value queue and power value queue of the capacitance sensor to be evaluated under a random humidity, which are arranged in the order of sampling time points.

3. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 2 is characterized in that: In Step 2, the capacitance fluctuation can be obtained by subtracting corresponding capacitance values ​​in a pair of adjacent capacitance value queues under humidity, or by subtracting each capacitance value in the capacitance value queue of the next humidity from the capacitance value average.

4. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 3 is characterized in that: In Step 2, the calculation equation for the fluctuation of capacitance value is determined as: Here, Represents the tth capacitance value in the capacitance value queue when the humidity is u1, represents the tth capacitance value in the capacitance value queue when the humidity is u0, x u1 is the fluctuation critical amount; In Step 2, the method for obtaining the fluctuation critical amount includes: Initially, obtaining the capacitance value data of the capacitance sensor during reasonable operation in the past, and calculating the capacitance value fluctuation value during reasonable operation; Then, the power value average of the current humidity and the humidity change between the current humidity and the previous humidity adjacent to it are obtained.

5. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 4 is characterized in that: In Step 2, the change in humidity is calculated; Then, according to the capacitance fluctuation value, humidity change and power value average, the current humidity fluctuation critical value is obtained; The method for calculating the humidity change includes: subtracting the humidity decrease from the previous humidity from the current humidity, and obtaining the quotient of the humidity decrease divided by the current humidity as the humidity change.

6. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 5 is characterized in that: The equation for the critical fluctuation is: u1 =η*e ufn *J u1 +x; here, x u1 is the critical fluctuation amount when the humidity is u1, e ufn represents the humidity change between humidity u1 and humidity u0, J u1 Represents the average power value when the humidity is u1, x represents the capacitance fluctuation value of the capacitance sensor when it is operating reasonably in the past, and η represents the humidity coefficient of the capacitance sensor.

7. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 6 is characterized in that: The calculation equation for the capacitance fluctuation is: Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained at the jth time, y j-1 Represents the capacitance value obtained for the j-1th time.

8. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 7 is characterized in that: The calculation equation for the capacitance fluctuation is: Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, p represents the total frequency of the capacitance value obtained by the previous capacitance sensor when it is operating reasonably, and y j represents the capacitance value obtained for the jth time, and ν represents the average capacitance value obtained for the pth time.

9. The control method of the intelligent interactive projection platform based on wall painting and 3D numbers according to claim 8 is characterized in that: The calculation equation for the capacitance fluctuation is: Here, X represents the capacitance fluctuation value of the previous capacitance sensor when it is operating reasonably, n represents the highest reduction level, and x k represents the capacitance fluctuation obtained by the k-th level reduction, yj represents the capacitance value obtained for the jth time, y j-k represents the capacitance value obtained for the jkth time, p k represents the total number of decrement values ​​of the k-th level decrement, p k =pk, where p is the total frequency of obtaining capacitance values ​​when the capacitance sensor is operating properly in the past; here, the total frequency of obtaining capacitance values ​​is the same as the total number of capacitance values.

10. An intelligent interactive projection platform based on wall painting and 3D numbers, characterized in that: include: The capacitive sensor, MCU, CPU and 3D projection device on the wall painting are connected in sequence. The capacitive sensor is used to send the capacitance value to the MCU after the finger hits it. The MCU is used to send the capacitance value to the CPU. The CPU is used to derive the output projection image signal to the 3D projection device according to the capacitance value. The 3D projection device is used to project the 3D image to a preset position on the wall according to the projection image signal, so as to achieve intelligent wall interactive projection on the wall painting. In addition, the power sensor and humidity sensor are both connected to the MCU. The power sensor is used to sample the power of the capacitive sensor and transmit it to the MCU. The humidity sensor is used to sample the humidity value of the environment where the capacitive sensor is located and transmit it to the MCU. The intelligent interactive projection platform based on wall painting and 3D digital also includes: An acquisition module, which is used to obtain the capacitance value and power value of the capacitive sensor to be evaluated under different humidity during the operation of realizing the intelligent wall interactive projection on the wall painting; A calculation module, which is used to calculate the capacitance fluctuation of each capacitance value of the capacitance value queue of the capacitance sensor to be evaluated under the current humidity during operation, when each capacitance value fluctuation is higher than the fluctuation threshold, there is a possibility of abnormal fluctuation, and the abnormal frequency of the possible abnormal fluctuation under the current humidity is summed up; The evaluation module is used to obtain the capacitance fluctuation frequency of the capacitance sensor under its reasonable operating humidity conditions in the past, calculate the subtrahend frequency obtained by subtracting the capacitance fluctuation frequency from the abnormal frequency of the capacitance sensor at each humidity, and calculate the coherence between the subtrahend frequency and the humidity; when the correlation is lower than the defined critical value, it is determined that the healthy operation performance evaluation of the capacitance sensor meets the standard.

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