WO2020133191A1 - Dispositif de reconnaissance d'épaisseur de pile de papier, procédé de reconnaissance d'épaisseur de pile de papier et dispositif d'entrée d'écriture manuscrite - Google Patents

Dispositif de reconnaissance d'épaisseur de pile de papier, procédé de reconnaissance d'épaisseur de pile de papier et dispositif d'entrée d'écriture manuscrite Download PDF

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Publication number
WO2020133191A1
WO2020133191A1 PCT/CN2018/124790 CN2018124790W WO2020133191A1 WO 2020133191 A1 WO2020133191 A1 WO 2020133191A1 CN 2018124790 W CN2018124790 W CN 2018124790W WO 2020133191 A1 WO2020133191 A1 WO 2020133191A1
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WO
WIPO (PCT)
Prior art keywords
thickness
paper
paper stack
sensor
sensors
Prior art date
Application number
PCT/CN2018/124790
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English (en)
Chinese (zh)
Inventor
李丽
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201880095918.5A priority Critical patent/CN112639393B/zh
Priority to PCT/CN2018/124790 priority patent/WO2020133191A1/fr
Publication of WO2020133191A1 publication Critical patent/WO2020133191A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

Definitions

  • 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.
  • 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.
  • 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.
  • FIG. 1 is a schematic structural diagram of a handwriting input device and a mobile terminal in an embodiment of the application
  • FIG. 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
  • FIG. 4 is a schematic diagram of a module of a paper stack thickness identification device in an embodiment of the present application.
  • FIG. 6 is a schematic front and side view of a paper stack thickness recognition device in an embodiment of this application.
  • FIG. 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.
  • FIG. 1 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • paper stacks A signal transmitter is provided on the tip of the stylus pen 12.
  • 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.
  • 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.
  • 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.
  • 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 .
  • Different paper thicknesses correspond to different linear tables.
  • 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.
  • the linear table is a linear relationship table between the writing distance and the compensation capacitance value.
  • 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
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the plurality of thickness sensors 1321 are respectively arranged in a one-to-one correspondence with the plurality of paper stack thickness detection ranges.
  • 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.
  • 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.
  • 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.
  • the controller 131 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the plurality of thickness sensors 1321 are staggered in the horizontal direction, thereby avoiding signal interference between the plurality of thickness sensors 1321.
  • 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.
  • 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, hence, paper stack thickness in the range hn-1 ⁇ h ⁇ hn paper stack Thickness detection range, paper stack thickness detection range ⁇ hn, etc.
  • 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.
  • the controller 131 determines that the thickness of the paper stack is zero.
  • 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.
  • the controller 131 determines that the paper stack is too thick, and controls to issue an ultra-thick reminder .
  • the controller 131 determines that the thickness detection fails, and controls to issue a detection failure reminder.
  • the thickness sensor 1321 is an infrared sensor.
  • FIG. 9 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.
  • the method for identifying the thickness of the paper stack includes the following steps:
  • the thickness sensing component 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);
  • the thickness of the paper stack is identified in response to the thickness sensing signal (step 902).
  • the reflected signal is the thickness sensing signal
  • the method for identifying the thickness of the paper stack further includes the steps of:
  • the method for identifying the thickness of the paper stack further includes the steps of:
  • the n thickness sensors 1321 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.
  • the method for identifying the thickness of the paper stack further includes the steps of:
  • 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.
  • 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.
  • 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.
  • 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.
  • the storage unit 133 may be used to store computer programs and/or modules.
  • 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Controlling Sheets Or Webs (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

La présente invention concerne un dispositif de reconnaissance d'épaisseur de pile de papier (13), comprenant un dispositif de commande (131) et un ensemble de détection d'épaisseur (132). Le dispositif de commande (131) est raccordé électriquement à l'ensemble de détection d'épaisseur (132). L'ensemble de détection d'épaisseur (132) et une position de placement de papier (P) sont disposés en parallèle. L'ensemble de détection d'épaisseur (132) est utilisé pour détecter l'épaisseur d'une pile de papier et pour générer un signal de détection d'épaisseur correspondant lorsque la pile de papier est placée sur la position de placement de papier (P), et le dispositif de commande (131) reconnaît l'épaisseur de la pile de papier en réponse au signal de détection d'épaisseur. La présente invention porte également sur un procédé de reconnaissance d'épaisseur de pile de papier et sur un dispositif d'entrée d'écriture manuscrite (1). Le dispositif d'entrée d'écriture manuscrite (1) présente un bon effet d'écriture quelle que soit l'épaisseur de la pile de papier.
PCT/CN2018/124790 2018-12-28 2018-12-28 Dispositif de reconnaissance d'épaisseur de pile de papier, procédé de reconnaissance d'épaisseur de pile de papier et dispositif d'entrée d'écriture manuscrite WO2020133191A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880095918.5A CN112639393B (zh) 2018-12-28 2018-12-28 纸沓厚度识别装置、纸沓厚度识别方法及手写输入装置
PCT/CN2018/124790 WO2020133191A1 (fr) 2018-12-28 2018-12-28 Dispositif de reconnaissance d'épaisseur de pile de papier, procédé de reconnaissance d'épaisseur de pile de papier et dispositif d'entrée d'écriture manuscrite

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Application Number Priority Date Filing Date Title
PCT/CN2018/124790 WO2020133191A1 (fr) 2018-12-28 2018-12-28 Dispositif de reconnaissance d'épaisseur de pile de papier, procédé de reconnaissance d'épaisseur de pile de papier et dispositif d'entrée d'écriture manuscrite

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WO2020133191A1 true WO2020133191A1 (fr) 2020-07-02

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WO2020005951A1 (fr) 2018-06-29 2020-01-02 Novomer, Inc. Systèmes et procédés de production d'acides organiques directement à partir de bêta-lactones

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017165323A1 (fr) 2016-03-21 2017-09-28 Novomer, Inc. Procédé amélioré de production d'acide acrylique
WO2020005951A1 (fr) 2018-06-29 2020-01-02 Novomer, Inc. Systèmes et procédés de production d'acides organiques directement à partir de bêta-lactones

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