WO2020133191A1

WO2020133191A1 - Paper stack thickness recognition device, paper stack thickness recognition method and handwriting input device

Info

Publication number: WO2020133191A1
Application number: PCT/CN2018/124790
Authority: WO
Inventors: 李丽
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-07-02
Also published as: CN112639393A; CN112639393B

Abstract

A paper stack thickness recognition device (13), comprising a controller (131) and a thickness sensing assembly (132). The controller (131) is electrically connected to the thickness sensing assembly (132). The thickness sensing assembly (132) and a paper placement position (P) are provided in parallel. The thickness sensing assembly (132) is used for sensing the thickness of a paper stack and generating a corresponding thickness sensing signal when the paper stack is placed on the paper placement position (P), and the controller (131) recognizes the thickness of the paper stack in response to the thickness sensing signal. A paper stack thickness recognition method and a handwriting input device (1). The handwriting input device (1) has a good writing effect regardless of the thickness of paper stack.

Description

Paper stack thickness recognition device, paper stack thickness recognition method and handwriting input device

Technical field

The present application relates to the field of handwriting recognition, in particular to a paper thickness recognition device, a paper thickness recognition method, and a handwriting input device with a paper thickness recognition device.

Background technique

At present, with the continuous development of the handwriting input device and the convenience of recording, it has been widely used in various occasions that require recording, such as conference records. The handwriting input device currently in use has an application of laying paper on the writing board. People can write physical handwriting on the paper through the stylus. At the same time, the stylus and the writing board will detect the written content and control the writing content. Show in other devices. However, the existing writing board has different writing effects on the thickness of the paper stack. The thicker the paper stack, the worse the writing effect. Occasionally, the pen breaks or the pen is lost, and the user experience is not good.

Summary of the invention

The embodiments of the present application disclose a paper stack thickness recognition device, a paper stack thickness recognition method, and a handwriting input device with a paper stack thickness recognition device, which can recognize the paper stack thickness to solve the above problems.

The paper thickness recognition device disclosed in the embodiments of the present application includes a controller and a thickness sensing component, the controller is electrically connected to the thickness sensing component, and the thickness sensing component is tiled side by side with a paper placement position The thickness sensing component is configured to sense the thickness of the paper stack and generate a corresponding thickness sensing signal when the paper stack is placed on the paper placement position, and the controller recognizes the thickness of the paper stack in response to the thickness sensing signal .

The method for recognizing the thickness of a paper stack disclosed in an embodiment of the present application is applied to a device for recognizing the thickness of a paper stack. The device for recognizing the thickness of a paper stack includes a thickness sensing component, which is arranged side by side in parallel with a paper placement position. The method for recognizing the thickness of the paper stack includes the steps of: when the thickness sensing component places the paper stack on the paper placement position, senses the thickness of the paper stack and generates a corresponding thickness sensing signal; and recognizes in response to the thickness sensing signal Paper stack thickness.

The handwriting input device disclosed in the embodiments of the present application includes a writing board and a paper thickness recognition device. The paper thickness recognition device is provided on one side of the writing board. The writing board includes a touch controller and a touch sensor. The paper placement position is set on the touch sensor, the paper stack thickness recognition device recognizes the paper stack thickness, and the touch controller adjusts the paper stack thickness for the touch sensor according to the paper stack thickness Compensation capacitor for writing handwriting recognition with stylus tip.

A paper stack thickness recognition device, a paper stack thickness recognition method, and a handwriting input device with a paper stack thickness recognition device of the present application, the thickness sensing component of the paper stack thickness recognition device senses when the paper stack is placed on the paper placement position The thickness of the paper stack and generate a corresponding thickness sensing signal, the controller recognizes the thickness of the paper stack in response to the thickness sensing signal, and the touch controller of the writing board adjusts to the paper stack according to the thickness of the paper stack The thickness of the compensation capacitor for the recognition of the handwriting between the touch sensor and the tip of the stylus. Therefore, no matter how thin or thick the paper is, it has a good writing effect.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

1 is a schematic structural diagram of a handwriting input device and a mobile terminal in an embodiment of the application;

2 is a schematic structural diagram of a handwriting input device according to an embodiment of the application;

FIG. 3 is a correspondence table between the thickness of the paper stack and the linear table in an embodiment of the present application;

4 is a schematic diagram of a module of a paper stack thickness identification device in an embodiment of the present application;

5 is a correspondence table between the thickness sensor, the thickness of the paper stack and the linear table in an embodiment of the present application;

6 is a schematic front and side view of a paper stack thickness recognition device in an embodiment of this application;

7 is a schematic front view and a side view of a paper thickness recognition device in another embodiment of the present application;

FIG. 8 is a correspondence table between the detection range of the thickness of the paper stack and the thickness sensor in an embodiment of the present application;

FIG. 9 is a schematic flowchart of a method for detecting the thickness of a paper stack in an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the scope of protection of this application.

The term "comprising" and any variations thereof in the description and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment. The terms “first”, “second” and “third” in the description and claims of the present application and the above drawings are used to distinguish different objects, not to describe a specific order.

Please refer to FIG. 1, which is a schematic structural diagram of a handwriting input device 1 according to an embodiment of the present application. The handwriting input device 1 is used for communication connection with a mobile terminal 2. Among them, the mobile terminal 2 may be, but not limited to, mobile phones, notebooks, tablet computers, e-readers, digital assistants, wearable electronic devices, projectors, televisions, and other electronic devices with network communication, content display, and data processing functions, etc. .

The handwriting input device 1 includes a tablet 11 and a stylus pen 12. Several papers 3 are laid on the writing board 11. The stylus pen 12 is used to write on the paper 3 placed on the tablet 11. The writing board 11 is used to sense the writing handwriting when the stylus 12 is writing on the paper 3 placed on the writing board 1, and the corresponding writing content data is obtained according to the writing handwriting and stored in real time on the writing board 11, and the The written content data is sent to the mobile terminal 2 so that the mobile terminal 2 displays the corresponding written content data. Among them, the stylus pen 12 is a stylus pen with ink or other refills. When the stylus pen 12 writes on the paper 3 placed on the writing pad 11, the actual writing handwriting is formed on the paper 3 at the same time.

Further, please refer to FIG. 2 together. The handwriting input device 1 further includes a paper stack thickness recognition device 13. The paper thickness recognition device 13 is provided on one side of the tablet 11. In one of the embodiments, the paper thickness recognition device 13 and the writing board 11 are two independent components, and the two are fixed to each other by a clamping structure, that is, the paper thickness recognition device 13 is a writing Accessories for board 11. It can be understood that in one of the modified embodiments, the paper thickness recognition device 13 and the writing board 11 are integrated.

Specifically, the tablet 11 includes a processor 111, a touch controller 112, and a touch sensor 113. The processor 111 is electrically connected to the touch controller 112, and the touch controller 112 is electrically connected to the touch sensor 113. In one of the embodiments, the touch sensor 113 is a touch screen, specifically a signal receiver. The touch sensor 113 is provided with a paper placement position P. The paper placement position P is used for stacking and placing several papers 3, and several papers 3 are stacked to form a paper stack. Hereinafter, for convenience of description, they are collectively referred to as "paper stacks". A signal transmitter is provided on the tip of the stylus pen 12. When the pen tip of the stylus pen 12 writes on the paper stack placed on the paper placement position P, the electromagnetic wave signal emitted by the signal transmitter of the pen tip of the stylus pen 12 is received by the touch sensor 113, and the processor 111 receives the touch sensor 113 according to the The electromagnetic wave signal recognizes the handwriting during writing.

The thickness of the paper stack placed on the paper placement position P of the touch sensor 113 is different in each case. The paper stack thickness recognition device 13 is used to recognize the paper stack thickness, and the touch controller 112 recognizes the paper recognized by the paper stack thickness recognition device 13 The thickness of the stack is adjusted to the compensation capacitance for the recognition of the handwriting between the touch sensor 113 and the tip of the stylus 12 adapted to the thickness of the stack of paper.

Therefore, in the present application, when the paper stack thickness recognition device 13 places the paper stack on the paper placement position P, the paper stack thickness is sensed, and the touch controller 112 of the writing board 11 adjusts to the paper stack thickness according to the paper stack thickness The compensation capacitor used for the recognition of the handwriting between the touch sensor 113 and the tip of the stylus 12 has a good writing effect no matter how thick the paper stack is.

The paper thickness recognition device 13 transmits the paper thickness to the processor 111 when the paper thickness is recognized. The processor 111 calculates the writing distance between the tip of the stylus pen 12 and the touch sensor 113 of the tablet 11 according to the thickness of the paper stack, and transmits the writing distance to the touch controller 112. The touch controller 112 calls up a linear table corresponding to the writing distance according to the writing distance, and adjusts the compensation capacitor for adapting the handwriting recognition between the touch sensor 113 and the tip of the stylus 12 according to the linear table, Makes the writing handwriting smoother and the writing effect better.

Specifically, in practical applications, the upper surface of the touch sensor 113 is covered with a protection plate, and the paper placement position P is set on the protection plate. Therefore, the writing distance between the tip of the stylus pen 12 and the touch sensor 113 of the writing pad 11 is the sum of the thickness of the paper stack and the thickness of the protective plate. Of course, in other embodiments, if the protective surface is not covered on the upper surface of the touch sensor 113, the writing distance between the tip of the stylus 12 and the touch sensor 113 of the writing board 11 is equal to the thickness of the paper stack .

Specifically, please refer to FIG. 3 together. Different paper thicknesses correspond to different linear tables. For example, when the thickness of the paper stack is 0~h1, the corresponding linear table is linear table 1; when the thickness of the paper stack is h1~h2, the corresponding linear table is linear table 2; when the thickness of the paper stack is hn-1~hn, the corresponding Is a linear table n. Wherein, the linear table is a linear relationship table between the writing distance and the compensation capacitance value. Wherein, in an embodiment, the forming process of the linear table is: placing a paper stack of a predetermined paper stack thickness on the paper placement position P of the touch sensor 113, and using the tip of the stylus 12 on the top of the paper stack When writing on a sheet of paper, in the process of writing with the stylus 12, the capacitance change at the position corresponding to the touch sensor 113 is sampled and compared with the ideal capacitance value at the position corresponding to the touch sensor 113 to obtain the difference between the ideal capacitance value and the actual capacitance value For the capacitance difference, the capacitance difference is used as the capacitance compensation value corresponding to the predetermined paper thickness, thereby forming a linear relationship table between the writing distance and the compensation capacitance value. That is to say, when the linear table is actually established, the actual capacitance value of each predetermined paper thickness needs to be sampled and compared with the ideal capacitance value to obtain the capacitance compensation value corresponding to the predetermined paper thickness, thereby obtaining each paper weight The capacitance compensation value at the thickness gives a linear table.

Therefore, when the paper thickness recognition device 13 recognizes the paper thickness, the processor 111 calculates the writing distance between the tip of the stylus 12 and the touch sensor 113 of the writing board 11 according to the paper thickness, and the touch controller 112 determines The writing distance calls up a linear table corresponding to the writing distance, and adjusts the compensation capacitor for adapting the handwriting recognition between the touch sensor 113 and the tip of the stylus 12 according to the linear table. Regardless of the thickness of the paper stack, the capacitance compensation value corresponding to the thickness of the paper stack can be matched, so that the writing handwriting is smoother and the writing effect is better.

Specifically, please refer to FIGS. 2 and 4 together. The paper thickness recognition device 13 includes a controller 131 and a thickness sensing component 132. The controller 131 is electrically connected to the thickness sensing component 132. The thickness sensing assembly 132 is arranged side by side with a paper placement position P. The thickness sensing component 132 is used to sense the thickness of the paper stack and generate a corresponding thickness sensing signal when the paper stack is placed on the paper placement position P. The controller 131 recognizes the thickness of the paper stack in response to the thickness sensing signal.

Specifically, in one of the embodiments, the paper stack thickness recognition device 13 further includes a storage unit 133, and the storage unit 133 pre-stores a plurality of paper stack thickness detection ranges. Please refer to FIG. 5 together. The thickness sensor assembly 132 includes a plurality of thickness sensors 1321. The plurality of thickness sensors 1321 are stacked at different heights, and are respectively used to detect different paper stack thickness detection ranges. Specifically, the plurality of thickness sensors 1321 are respectively arranged in a one-to-one correspondence with the plurality of paper stack thickness detection ranges. When receiving the thickness sensing signal generated by one of the thickness sensors 1321 of the plurality of thickness sensors 1321, the controller 131 determines that there is a paper stack within the thickness detection range of the paper stack corresponding to the one of the thickness sensors 1321.

Specifically, please refer to FIG. 6 together. Each thickness sensor 1321 includes a light emitting tube E and a light receiving tube R. The light-emitting tube E is used to emit an emission signal. When the emission signal is reflected by the paper within the thickness monitoring range of the paper stack corresponding to the thickness sensor 1321, the light-receiving tube R receives the reflection signal, and the reflection signal is Thickness sensing signal. The controller 131 determines whether there is a paper wedge within the paper thickness detection range corresponding to the thickness sensor 1321 according to the reflection signal.

Specifically, when the light-emitting tube E emits an emission signal and the light-receiving tube R receives a reflection signal, the controller 131 according to the difference between the reflection signal received by the light-reception tube R and the emission signal The time interval and the light intensity of the reflected signal determine whether there is a paper wedge in the paper wedge thickness detection range corresponding to the thickness sensor 1321. Since both the paper stack and the thickness sensor 1321 are stacked, the distance between the plurality of thickness sensors 1321 and the paper stack in the corresponding paper stack thickness monitoring range is the same, when there is a paper stack in the corresponding paper stack thickness monitoring range The time interval between the reflected signal and the transmitted signal of the plurality of thickness sensors 1321 is substantially equal. When one of the thickness sensors 1321 does not receive the reflection signal within the preset time period or the received reflection signal's illumination intensity does not meet the preset illumination intensity range, it is determined that there is no paper or debris in the corresponding paper stack thickness monitoring range. Therefore, the controller 131 can determine whether there is a paper wedge within the paper wedge thickness detection range corresponding to the thickness sensor 1321 according to the reflection signal.

Specifically, in one of the embodiments, the plurality of thickness sensors 1321 simultaneously transmit the transmitted signal and receive the reflected signal to identify whether there is paper in the thickness detection range corresponding to each thickness sensor 1321. Therefore, the recognition speed of the paper stack is faster.

Optionally, in one of the modified embodiments, the plurality of thickness sensors 1321 perform transmission of the transmission signal and reception of the reflection signal one by one, and identify whether there is paper in the thickness detection range corresponding to each thickness sensor 1321 one by one. That is, for example, as shown in FIG. 5, when the thickness sensor 1 transmits a signal and receives a reflected signal, the thickness sensor 1 starts transmitting and receiving signals, and so on, so that interference between multiple signals can be avoided.

It can be understood that in one of the embodiments, the paper stack thickness recognition device 13 further includes a bracket 135, the bracket 135 is disposed on the side of the writing board 11, and the bracket 135 and the paper are placed The surface of bit P is perpendicular. The plurality of thickness sensors 1321 are respectively disposed at different heights of the bracket 135 to respectively correspond to the thickness detection ranges of the plurality of paper stacks, and the light emitted from each thickness sensor 1321 is parallel to the surface of the paper.

Specifically, in one of the embodiments, the plurality of thickness sensors 1321 are staggered in the horizontal direction, thereby avoiding signal interference between the plurality of thickness sensors 1321.

Specifically, in one of the embodiments, an optical spacer 137 is provided between two adjacent thickness sensors 1321 of the plurality of thickness sensors 1321. The light spacer 137 is opaque. The light spacer 137 includes a horizontal light spacer and a vertical light spacer, so that each thickness sensor 1321 is enclosed in an independent space. Therefore, signal interference between the plurality of thickness sensors 1321 can be effectively avoided.

Specifically, please refer to FIG. 8 together. In one embodiment, the plurality of paper stack thickness detection ranges include n paper stack thickness detection ranges arranged in order from small to large, for example, the paper stack thickness is in the interval 0 <h<h1 paper stack thickness detection range, paper stack thickness in the range h1≤h<h2 paper stack thickness detection range,......, paper stack thickness in the range hn-1≤h<hn paper stack Thickness detection range, paper stack thickness detection range ≥hn, etc. Among them, h1, h2, hn-1 to hn are the thickness of the paper stack. The plurality of thickness sensors 1321 includes n thickness sensors 1321 arranged in order from low to high, for example, thickness sensor 1, thickness sensor 2, ... thickness sensor n-1, thickness sensor n. The n thickness sensors 1321 are set corresponding to the n paper stack thickness detection ranges.

Specifically, in one of the embodiments, when none of the n thickness sensors 1321 receives a corresponding reflection signal within a preset time period, the controller 131 determines that the thickness of the paper stack is zero.

When the first thickness sensor 1321 to the n-1th thickness sensor 1321 all receive the corresponding reflection signals, it is determined that there is paper from the first paper stack thickness detection range to the n-1th paper stack thickness detection range, and it is determined The thickness of the paper stack is the thickness value corresponding to the detection range of the n-1th paper stack thickness. It can be understood that the thickness value corresponding to the n-1th paper stack thickness detection range may be the maximum value, the minimum value, the average value, or other suitable values of the n-1th paper stack thickness detection range.

Specifically, in one of the embodiments, when the n thickness sensors 1321 all receive corresponding reflection signals within a preset time period, the controller 131 determines that the paper stack is too thick, and controls to issue an ultra-thick reminder .

Specifically, in one of the embodiments, when the first thickness sensor 1321 and the n-1th thickness sensor 1321 of the n thickness sensors 1321 receive corresponding reflection signals, but the first thickness sensor 1321 and When at least one thickness sensor 1321 between the n-1th thickness sensors 1321 does not receive the corresponding reflection signal, the controller 131 determines that the thickness detection fails, and controls to issue a detection failure reminder.

Specifically, in one of the embodiments, the thickness sensor 1321 is an infrared sensor.

Please refer to FIG. 9, which is a flowchart of a method for identifying the thickness of a paper stack in an embodiment of the present application. This paper thickness recognition method is applied to the aforementioned paper thickness recognition device 13. The paper thickness recognition device 13 includes a thickness sensing component 132 that is arranged side by side with a paper placement position P. It can be understood that the execution sequence of the paper thickness recognition method is not limited to the figure 9 shows the sequence. Specifically, the method for identifying the thickness of the paper stack includes the following steps:

When the thickness sensing component places a paper stack on the paper placement position P, it senses the thickness of the paper stack and generates a corresponding thickness sensing signal (step 901); and

The thickness of the paper stack is identified in response to the thickness sensing signal (step 902).

Further, "recognizing the thickness of the paper stack in response to the thickness sensing signal" includes:

When the first thickness sensor 1321 to the n-1th thickness sensor 1321 all receive the corresponding reflection signals, it is determined that there is paper from the first paper stack thickness detection range to the n-1th paper stack thickness detection range, wherein , The reflected signal is the thickness sensing signal;

Determine the thickness of the paper stack as the thickness value corresponding to the n-1th paper stack thickness detection range.

Further, the method for identifying the thickness of the paper stack further includes the steps of:

When none of the n thickness sensors 1321 receives a corresponding reflection signal within a preset time period, it is determined that the thickness of the paper stack is zero.

When the n thickness sensors 1321 all receive corresponding reflection signals within a preset time period, it is determined that the paper stack is super thick, and the super thick reminder is controlled.

When the first thickness sensor 1321 and the n-1th thickness sensor 1321 of the n thickness sensors 1321 receive the corresponding reflection signals, but between the first thickness sensor 1321 and the n-1th thickness sensor 1321 When at least one thickness sensor 1321 does not receive the corresponding reflection signal, it determines that the thickness detection fails, and controls to issue a detection failure reminder.

Further, before the “thickness sensing component places a paper stack on the paper placement position P, the thickness of the paper stack is sensed and a corresponding thickness sensing signal is generated”, the paper stack thickness recognition method further includes steps:

The plurality of thickness sensors 1321 are controlled to simultaneously transmit the transmitted signal and receive the reflected signal, where the reflected signal is the thickness sensing signal. Therefore, the recognition speed of the paper stack is faster.

Further, before the “thickness sensing component places a paper stack on the paper placement position P, senses the thickness of the paper stack and generates a corresponding thickness sensing signal”, the paper stack thickness recognition method further includes the steps of:

The plurality of thickness sensors 1321 are controlled to transmit the transmitted signal and receive the reflected signal one by one, wherein the reflected signal is the thickness sensing signal to avoid mutual interference between the signals.

Therefore, in this application, no matter how thick the paper stack is, it has a good writing effect.

It should be noted that the processor 111 may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated) Circuit (ASIC), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the general-purpose processor may also be any conventional processor or the like. It can be understood that, in other embodiments, the processor 111 may also be built into the paper thickness recognition device 13.

It should be noted that the storage unit 133 may be used to store computer programs and/or modules. In addition, the storage unit 133 may include a high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart, Media, Card, SMC), and a secure digital (Secure Digital) , SD) card, flash card (Flash Card), multiple disk storage devices, flash memory devices, or other volatile solid-state storage devices.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited by the described action sequence, Because according to the present application, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

In the above embodiments, the description of each embodiment has its own emphasis. For a part that is not described in detail in an embodiment, you can refer to the related descriptions of other embodiments.

The steps in the method of the embodiment of the present application may be adjusted, merged, and deleted sequentially according to actual needs.

A person of ordinary skill in the art can understand that all or part of the process in the method of the above embodiment can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium, and the program is being executed At this time, the process of the embodiments of the above methods may be included. Among them, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM for short), etc.

The embodiments of the present application have been described in detail above, and specific examples have been used in this article to explain the principles and embodiments of the present application. Those of ordinary skill in the art, according to the ideas of the present application, may have changes in specific embodiments and application scopes. In summary, the content of this specification should not be construed as limiting the present application.

Claims

A device for recognizing the thickness of a paper stack is characterized by comprising a controller and a thickness sensing component, the controller is electrically connected to the thickness sensing component, and the thickness sensing component is tiled side by side with a paper placement position The thickness sensing component is configured to sense the thickness of the paper stack and generate a corresponding thickness sensing signal when the paper stack is placed on the paper placement position, and the controller recognizes the thickness of the paper stack in response to the thickness sensing signal .
The paper thickness recognition device according to claim 1, wherein the paper thickness recognition device further comprises a storage unit, the storage unit pre-stores a plurality of paper thickness detection ranges, and the thickness sensing component includes multiple Thickness sensors, the plurality of thickness sensors are respectively arranged at different heights, and correspond to the thickness detection range of the plurality of paper stacks, the controller generates the thickness sensor after receiving one of the plurality of thickness sensors When the thickness sensing signal is determined, it is determined that there is a paper wad within the thickness detection range of the paper wand corresponding to the one of the thickness sensors.
The paper thickness recognition device according to claim 2, wherein each thickness sensor includes a light-emitting tube and a light-receiving tube, the light-emitting tube is used to emit an emission signal, the emission signal is corresponding to the thickness sensor paper When the paper in the thickness monitoring range reflects, the light receiving tube receives a reflection signal, the reflection signal is a thickness sensing signal, and the controller determines the paper thickness detection range corresponding to the thickness sensor according to the reflection signal Is there a paper wad?
The device for recognizing the thickness of a paper stack according to claim 3, wherein the plurality of thickness sensors simultaneously transmit the transmission signal and receive the reflection signal to identify whether there is paper in the thickness detection range corresponding to each thickness sensor Or, the plurality of thickness sensors individually transmit the transmitted signal and receive the reflected signal, and individually identify whether there is paper in the thickness detection range corresponding to each thickness sensor.
The device for identifying the thickness of a paper stack according to any one of claims 3 to 4, wherein the device for identifying the thickness of a paper stack further includes a bracket, and the plurality of thickness sensors are respectively disposed at different heights of the bracket to Corresponding to the detection ranges of the thicknesses of the paper stacks, respectively, and the light emitted by each thickness sensor is parallel to the surface of the paper stacks.
The paper thickness recognition device according to claim 5, wherein the plurality of thickness sensors are staggered in the horizontal direction; and/or between two adjacent thickness sensors of the plurality of thickness sensors An optical spacer is provided, wherein the optical spacer is opaque.
The paper thickness recognition device according to any one of claims 2 to 6, wherein the plurality of paper thickness detection ranges include n paper thickness detection ranges arranged in order from small to large. Each thickness sensor includes n thickness sensors arranged in order from low to high. The n thickness sensors are set corresponding to the n paper stack thickness detection ranges; when the first thickness sensor to the n-1th thickness sensor are all When receiving the corresponding reflection signal, it is determined that there is paper from the first paper stack thickness detection range to the n-1 paper stack thickness detection range, and the paper stack thickness is the thickness value corresponding to the n-1 paper stack thickness detection range .
The paper thickness recognition device of claim 7, wherein when none of the n thickness sensors receives a corresponding reflection signal within a preset time period, the controller determines that the paper thickness is zero .
The device for recognizing the thickness of a paper stack according to claim 7, wherein when all of the n thickness sensors receive corresponding reflection signals within a preset period of time, the controller determines that the paper stack is too thick, and Control issued a thick reminder.
The paper thickness recognition device according to claim 7, wherein when the first thickness sensor and the n-1th thickness sensor among the n thickness sensors receive corresponding reflection signals, When at least one thickness sensor between the thickness sensor and the n-1th thickness sensor does not receive a corresponding reflection signal, the controller determines that the thickness detection fails, and controls to issue a detection failure reminder.
The paper stack thickness recognition device according to any one of claims 2 to 10, wherein the thickness sensor is an infrared sensor.
A method for recognizing the thickness of a paper stack is applied to a device for recognizing the thickness of a paper stack. The device for recognizing the thickness of a paper stack includes a thickness sensing component. The thickness sensing component is arranged side by side with a paper placement position. The method for identifying the thickness of the paper stack includes the following steps:

When the thickness sensing component places a paper stack on the paper placement position, it senses the thickness of the paper stack and generates a corresponding thickness sensing signal; and

The thickness of the paper stack is identified in response to the thickness sensing signal.
The paper thickness recognition method according to claim 12, wherein the paper thickness recognition device further comprises a storage unit, and the storage unit prestores n paper thickness detection ranges arranged in order from small to large. The thickness sensing assembly includes n thickness sensors arranged in order from low to high, and the n thickness sensors are set corresponding to the n paper stack thickness detection ranges; "Identifying the paper stack thickness in response to the thickness sensing signal" include:

When all of the first thickness sensor to the n-1th thickness sensor receive corresponding reflection signals, it is determined that there is paper from the first paper stack thickness detection range to the n-1 paper stack thickness detection range, wherein the reflection The signal is the thickness sensing signal;

Determine the thickness of the paper stack as the thickness value corresponding to the n-1th paper stack thickness detection range.
The method for recognizing the thickness of a paper stack according to claim 13, further comprising the steps of:

When none of the n thickness sensors receives a corresponding reflection signal within a preset time period, it is determined that the thickness of the paper stack is zero.
The method for recognizing the thickness of a paper stack according to claim 13, further comprising the steps of:

When the n thickness sensors all receive corresponding reflection signals within a preset time period, it is determined that the paper stack is super thick, and the super thick reminder is controlled.
The method for recognizing the thickness of a paper stack according to claim 13, further comprising the steps of:

When the first thickness sensor and the n-1th thickness sensor among the n thickness sensors receive corresponding reflection signals, but at least one thickness between the first thickness sensor and the n-1th thickness sensor When the sensor does not receive the corresponding reflection signal, it determines that the thickness detection fails, and controls to issue a detection failure reminder.
The method for recognizing the thickness of a paper stack according to claim 13, wherein the thickness sensing assembly includes a plurality of thickness sensors, and the plurality of thickness sensors are arranged at different heights, "the thickness sensing assembly is located in the Before placing the paper stack on the paper placement position, before sensing the thickness of the paper stack and generating the corresponding thickness sensing signal, the paper stack thickness identification method further includes the steps of:

Controlling the plurality of thickness sensors to simultaneously transmit the transmission signal and receive the reflection signal, wherein the reflection signal is the thickness sensing signal.
The method for recognizing the thickness of a paper stack according to claim 13, wherein the thickness sensing assembly includes a plurality of thickness sensors, and the plurality of thickness sensors are arranged at different heights, "the thickness sensing assembly is located in the Before placing the paper stack on the paper placement position, before sensing the thickness of the paper stack and generating the corresponding thickness sensing signal, the paper stack thickness identification method further includes the steps of:

The plurality of thickness sensors are controlled to perform transmission of a transmission signal and reception of a reflection signal one by one, wherein the reflection signal is the thickness sensing signal.
A handwriting input device, characterized in that it includes a writing board and a paper thickness recognition device, the paper thickness recognition device is provided on one side of the writing board, and the paper thickness recognition device is as claimed in claim 1- 11. The paper thickness recognition device according to any one of the items, the writing board includes a touch controller and a touch sensor, the paper placement position is set on the touch sensor, and the paper thickness recognition device recognizes the paper weight Thickness, the touch controller calls out a compensation capacitor adapted to the thickness of the paper stack for writing handwriting recognition between the touch sensor and the tip of the stylus according to the thickness of the paper stack.
The handwriting input device according to claim 19, wherein the writing board includes a processor, and the processor calculates a writing distance between the touch sensor and the tip of the stylus pen during writing according to the thickness of the paper stack, so The touch controller calls up a linear table corresponding to the writing distance according to the writing distance, and adjusts a compensation capacitor for writing handwriting recognition between the touch sensor and the tip of the stylus according to the linear table.
The handwriting input device according to claim 19, wherein the paper thickness recognition device further comprises a bracket, the bracket is disposed on the side of the writing board, and the bracket and the paper are placed The surface is perpendicular.