WO2022186731A2 - Method for receiving and detecting optical scanning signal (options) and device for its implementation - Google Patents

Method for receiving and detecting optical scanning signal (options) and device for its implementation Download PDF

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Publication number
WO2022186731A2
WO2022186731A2 PCT/RU2022/050070 RU2022050070W WO2022186731A2 WO 2022186731 A2 WO2022186731 A2 WO 2022186731A2 RU 2022050070 W RU2022050070 W RU 2022050070W WO 2022186731 A2 WO2022186731 A2 WO 2022186731A2
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WIPO (PCT)
Prior art keywords
light receivers
time slots
optical scanning
light
time slot
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PCT/RU2022/050070
Other languages
French (fr)
Inventor
Valery Konstantinovich LYUBEZNOV
Original Assignee
Lyubeznov Valery Konstantinovich
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Publication of WO2022186731A2 publication Critical patent/WO2022186731A2/en

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Classifications

    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G06F3/041661—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window

Definitions

  • This technical solution relates to the field of computer technology, in particular to the field of technology for touch input of information into a computer and is intended for use as part of human-machine interaction interface devices for computer systems operated in harsh environment, including transport means.
  • An interactive touch input device is known from the prior art, disclosed in the US Patent No. 4761637 "Touch input device", patentee: Carroll Touch Inc. (Round Rock,TX), published 08/02/1988.
  • the device contains a set of light detectors electrically connected in a matrix, with each light detector being addressed separately in the matrix, and driver facilities.
  • This technical solution has a limitation consisting in the use of a sequential activation scheme for light detectors, which determines the significant duration of the activation cycle of the named set of light detectors as a whole and the corresponding response time of the touch input device.
  • the infrared touch system includes the first and second sets of infrared emitters and the first and second sets of infrared receivers, wherein the infrared emitters and infrared receivers are located on the periphery of the touch detection area opposite each other and each infrared receiver is aligned with one opposing infrared emitter, a processor for controlled activation of the first and second sets of infrared emitters and controlled activation of the first and second sets of infrared receivers and calculating the touch position of the touch screen based on sequential on-axis activation of each infrared emitter and the opposing receiver and sequential activation of selected off-axis emitter-receiver pairs.
  • This technical solution has a limitation consisting in the use of a sequential activation circuit of light emitters and light receivers, which causes a significant duration of the scanning cycle of the touch detection area and, accordingly, a significant response time of the touch system.
  • optical control system disclosed in the US Patent No. 8426799 "Optical control system with feedback control", patentee: Rapt IP Limited (Gibraltar,GI), published on 04/23/2013.
  • the system contains a plurality of optical emitters and a detection system containing a plurality of optical detectors, wherein a plurality of light emitters and a plurality of light receivers determine the area of optical trajectories provided over a time interval by energy transfer between light emitters and light receivers, and also contains a switch designed to control the detectors.
  • This technical solution has a limitation, which consists in detecting the presence of an object in the predetermined area based on the sequential activation of light emitters and light receivers. This detection scheme causes a significant duration of the scanning cycle of the predetermined area.
  • the response time is determined by the duration of the scanning cycle of the detection area.
  • the duration of the scanning cycle consists of the activation time of the light emitter - light receiver pairs during the formation of a grid of detector light beams overlapping the detection area.
  • the time interval of the activation cycle of each individual light receiver includes two parts.
  • the first part of the light receiver activation cycle is a time interval during which transients occur in the activated light receiver caused by the discharge of the charge accumulated in the inactive state and making it impossible to receive a reliable signal at its output provided by the activated light emitter. This time interval is defined as a pause interval.
  • the second part of the light receiver activation cycle is operational, during which there is reliable reception and, accordingly, reliable detection of a light beam from an activated light emitter.
  • the smaller the number of pulses in a separate detector beam of light connecting the light emitter and the light receiver the greater the proportion of the above-mentioned pause time intervals in the optical scanning signal. For this reason, the use of a sequential activation scheme of individual light receivers, when forming a grid of light detector beams, is ineffective.
  • the problem although not fully, is solved by combining the light receivers into blocks and activating them block by block.
  • the block activation of light receivers should also be considered ineffective.
  • the problem of reducing the duration of the activation cycle of light emitters and light receivers placed on a specially dedicated separate printed circuit board is in contradiction with the use of an intermodule serial interface to control activation, which additionally increases the duration of the activation cycle of emitter-receiver pairs.
  • the technical result is an increase in the reliability of detecting an object characterized by dynamics with an intensive change of movement directions.
  • the specified technical result is achieved by implementing a method for receiving and detecting an optical scanning signal for scanning a predetermined area, comprising the steps of:
  • the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal
  • the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
  • the block topology is a block-line topology.
  • the block-modular principle of addressing is provided using the addressing window.
  • the configurable logical time slot is a logical time slot selectively associating light receivers with physical time slots.
  • the block-modular principle of addressing light receivers is based on the sliding window principle.
  • an activation of at least a part of the mapped light receivers is provided using the activation window.
  • the activation of at least a part of the mapped light receivers is provided using the activation window, based on the sliding window principle.
  • selective detection of a signal is provided by at least one activated light receiver using the detection window.
  • the specified technical result is also achieved by implementing a method for receiving and detecting an optical scanning signal of a predetermined area, comprising the steps of:
  • the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal
  • the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
  • the addressing of light receivers based on the block-modular addressing principle is provided.
  • the configured logical time slots are progressively mapped into physical time slots in conjunction with the following of the physical time slots.
  • the detection of the signal is provided by activated light receivers in conjunction with the following physical time slots.
  • a device for receiving and detecting an optical scanning signal of a predetermined area comprising: a set of electronic scanning elements, including at least a plurality of light-receiving elements located in an orderly manner at the periphery of the predetermined area on the first printed circuit board and electrically connected using a conductive pattern providing a block topology of connections and selective addressing of light receivers based on the block-modular principle, and the set of electronic scanning elements has a first group of electrical connecting conductors and a second group of electrical connecting conductors; and
  • a set of electronic detecting elements electrically connected to the set of electronic scanning elements using the first group of connecting electrical conductors and the second group of electrical connecting conductors and including electronic elements for selective addressing of light receivers based on the block-modular principle, selective activation of at least part of the addressed light receivers and selective detection of a signal provided by at least one activated light receiver.
  • the first group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
  • the second group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
  • the device further comprises a second printed circuit board and at least part of the set of electronic detecting elements are located on the second printed circuit board.
  • the first printed circuit board is a flexible printed circuit board.
  • Figure 1 is a block diagram of an infrared system for detecting an object in a predetermined area
  • Figure 2 is a flowchart of a procedure for detecting an optical scanning signal of a predetermined area in accordance with the considered technical solution
  • Figure 3 is a schematic diagram of the configuration of a logical time slot in relation to the present embodiment of the technical solution
  • Figure 4a is a schematic representation of the mapping of light receivers to logical time slots in nonlinear scanning
  • Figure 4b is a schematic diagram showing a fragment of mapping logical time slots to physical time slots in nonlinear scanning
  • Figure 5 is a block diagram of an apparatus for receiving and detecting an optical scanning signal of a predetermined area in accordance with a contemplated embodiment of the disclosed technical solution
  • Figure 6 is a connection diagram of light receivers in accordance with a contemplated embodiment of the disclosed technical solution
  • Figure 7 is a functional block diagram of an individual channel of a predetermined processing means
  • Figure 8a is a timing diagram of the output signal of the first channel of the predetermined processing means
  • Figure 8b is a timing diagram of the output signal of the second channel of the predetermined processing means
  • Figure 8c is a timing diagram of the output of the detection switch
  • Figure 9 is a block diagram of preconditioned processing means
  • Figure 10 is a block diagram illustrating an embodiment of a device for receiving and detecting an optical scanning signal of a predetermined area in accordance with the present embodiment of the technical solution.
  • the logical time slot - a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
  • Block-line electrical connection topology of light receivers an electrical connection topology of light receivers according to which the light receivers are connected in blocks lined up in a line.
  • Block-modular principle of addressing light receivers - a principle of addressing blocks of light receivers, which provides simultaneous addressing of at least two blocks of light receivers at the same time.
  • Predefined signal processing the processing of an analog signal with a predetermined set of operations.
  • Preconditioned signal processing is an analog signal processing with a predetermined set of operations and conditions for their execution.
  • the technical solution is disclosed by the example of an infrared system for detecting an object, in other words, a pointer, in the predetermined area using an amplitude-modulated optical scanning signal.
  • a typical structure of an infrared detection system is shown in Figure 1.
  • the infrared detection system comprises the predetermined detection area 100, a plurality of light emitters 101 such as infrared LEDs, a set of 102 light receivers, such as phototransistors, a component 103 for addressing and activating light emitters, including light emitter drivers, a component 104 for addressing light receivers, including analog multiplexers, and a processor component 105.
  • a plurality of light emitters 101 are located on two adjacent sides of a predetermined detection area 100, and a plurality of light receivers 102 are located on opposite two adjacent sides thereof, and each light receiver is axially aligned with one opposing light emitter.
  • the processing component 105 includes a detector for detecting a signal provided by the light receivers upon receiving the optical scanning signal, and a microcontroller for controlling the operation of the components of the infrared detection system.
  • Scanning the predetermined area 100 to detect an object 106 is performed by sequentially unfolding a grid 107 of light beams provided by sequential activation of the light emitter-light receiver pairs.
  • the mapping of the grid 107 of light beams to the time axis will be considered as an optical scanning signal.
  • FIG. 2 is a flowchart of a procedure for detecting an optical scanning signal in accordance with the disclosed technical solution. This procedure is performed as follows.
  • a plurality of light receivers is placed at the periphery of a predetermined area and electrically connected to each other to provide a block-line topology and a block- modular principle of addressing.
  • a plurality of light receivers is organized into blocks with the possibility of their addressing using an addressing window that overlaps two light receiver blocks, each of which includes four light receivers.
  • the light receivers of the plurality of 102 light receivers are selectively mapped into a segmented configured logical time slot.
  • the segmentation of a logical time slot is based on the mapping of light receivers into it so that each separate segment is intended to map a separate light receiver into it and corresponds to a separate physical time slot.
  • Figure 3 is a schematic diagram of associating light receivers of a plurality of 102 light receivers with physical time slots 111 using logical time slot 112, in other words, configuring logical time slot
  • the light receivers are addressed using the addressing window
  • the configuring of the logical time slot consists in linking the physical time slots, on which the reception and detection of the optical scanning signal should be performed, and the light receivers, which must provide this reception and detection of the optical scanning signal.
  • the light receivers are selectively coupled to physical time intervals by selectively mapping the light receivers to the logical time slot.
  • the logical time slot in other words, the previously mapped light receivers, is selectively mapped to physical time slots.
  • the processor component 105 provides the linking of light receivers and physical time slots. It is obvious that depending on whether the scanning is linear or non-linear, there will be a linear or non-linear nature of the addressing of the light receivers and the physical time slots in which they are mapped.
  • the light receivers are mapped to a logical time slot 112 using an addressing window 113 providing selective addressing of the light receivers from the plurality of light receivers 102 and controllably moved over the light receivers in accordance with the sliding window principle. Moreover, the light receivers are mapped to a logical time slot 112 with the provision of activation of at least part of the mapped light receivers. Activation is performed on the basis of an activation window, which is controllably moved over the addressed light receivers.
  • the logical time slot 112 is selectively and progressively mapped, in other words, the light receivers mapped in it, activated at the previous step, in physical time slots 111.
  • the mapping is performed to ensure the detection of the signal provided in each separate physical time slot by a separate light receiver. Detection is performed using a detection window that provides a selection of one light receiver from among the activated light receivers to detect the signal provided by this light receiver when receiving an optical scanning signal in the current physical time slot.
  • Figures 4a and 4b are a schematic diagram of an example of the above discussed optical scanning signal fragment with a scan direction change.
  • This example illustrates the detection of a fragment of the optical scanning signal including ten physical time slots labeled PTI(i)...PTI(i+9) using light receivers labeled LD(k+1)...LD(k+3), LD(1+0)...LD(1+3), LD(m), LD(k+2), LD(k+l), belonging to three blocks of light receivers, labeled LD(K), LD (L), LD (M).
  • the association of light receivers with physical time slots is performed using logical time slots 114, 115, 116 denoted as LTI(A), LTI(B), LTI(C).
  • Figure 4a is a schematic diagram of the selective and progressive mapping of the light receivers LD(K), LD(L), LD(M) to the configured logical time slots 114,115,116, denoted LPT(A), LPT(B), LPT(C), using addressing window 113.
  • Mapping is performed based on block-modular addressing of pairs of light receivers LD(K)-LD(L), LD(L)-LD(M), LD(K)-LD(L), in accordance with the sliding window principle. Mapping is performed to ensure that a part of the light receivers is activated. With regard to the considered embodiment of the technical solution, two light receivers are simultaneously activated, from among the light receivers mapped in each separate logical time slot.
  • the activation of the light receivers is provided using the activation window 117, which is controllably moved over a logical time slot with a step of following their segments.
  • the broken lines show the previous locations of the activation window 117.
  • Vertical arrows indicate selective and time-translational mapping of light emitters to logical time slots.
  • Figure 4b is a schematic representation of a fragment of the selective and progressively mapping of logical time slots 114,115,116, indicated by LPT(A), LPT(B), LPT(C), to physical time slots 118, indicated by PTI(i+4), PTI(i+5), PTI(i+6), PTI(i+7), PTI(i+8), PTI(i+9).
  • mapping is performed to ensure sequential detection of the signal provided by the light receivers in the following order LD(k+l), LD(k+2), LD(k+3), LD(1), LD(1+1), LD(l+2), LD(l+3), LD(m), LD(K2), LD(K1) when receiving an optical scanning signal at the following physical time slots PTI(i+4), PTI(i+5), PTI(i+6), PTI(i+7), PTI(i+8), PTI(i+9). Accordingly, mapping is performed using the detection window 119, which is controllably moved across the activated light receivers. The broken lines show the previous locations of the detection window 119. The horizontal arrows indicate the selective and progressive sweep in time of the detection process of the optical scanning signal.
  • FIG. 5 is a block diagram of an apparatus for detecting an optical scanning signal for scanning the predetermined area in accordance with a contemplated embodiment of the disclosed technical solution.
  • the device includes a cascaded addressing circuit 104 for selectively addressing the light receivers, a plurality of 102 light receivers, an activation switch 120 for selectively activating the addressed light receivers, a predefined processing means 121 for preprocessing a signal provided by the light receivers, a detection switch 122 for selectively detecting a signal provided by activated light receivers, preconditioned processing means 123 for detecting a signal provided by the separate light receiver in a separate physical time slot.
  • the detecting device is controlled by a microcontroller 124, which includes a microprocessor 125, an interface module 126 and an analog-to-digital conversion module 127.
  • the output of the preconditioned processing means 123 is coupled to the input of the analog-to-digital conversion module 127 of the microcontroller 124 using signal 128.
  • Figure 6 illustrates the connection diagram of the light receivers in accordance with the considered implementation of the disclosed technical solution.
  • a set 102 of light receivers such as phototransistors
  • the phototransistor blocks are addressed using the addressing component 104, which includes two analog multiplexers for independent addressing of two phototransistor blocks simultaneously, respectively.
  • the addressing of phototransistor blocks in other words, the connection of their emitters to zero potential, is performed using the control signal 129.
  • the signal 129 includes two binary control code words, respectively, of the two analog multiplexers named above.
  • the addressing component 104 provides addressing of the light-receiver module, which includes two blocks of four phototransistors in each block, which provide, respectively, two sets of 130 and 131 output signals received from phototransistor collectors.
  • the activation switch 120 is made using two analog switches 4:1. Each of the switches provides independent selective switching of one of the four input signals to the output. Each of the analog switches provides switching of the collector of the phototransistor to be activated from the addressed phototransistor block to its output. In relation to the considered embodiment of the technical solution, using the activation window, two phototransistors are simultaneously activated, in other words, part of the addressed light receivers.
  • the microcontroller 124 controls the operation of the activation switch 120 using the corresponding control signal. This signal is a positional code that provides switching of collectors of phototransistors to be activated to the inputs of the two-channel predefined processing means 121.
  • Figure 7 illustrates a functional diagram of a separate channel of the predefined processing means 121, the input of which is connected through an analog multiplexer of the activation switch 120 to the collector of the activated phototransistor 132.
  • the circuit includes a voltage regulator and a differential amplifier connected in series.
  • the voltage regulator is a precision shunt voltage regulator and is made using an operational amplifier 133, a transistor 134, and resistors 135 and 136.
  • the voltage regulator provides a regulated voltage to the collector of the activated phototransistor, obtained across the resistor 135 and determined by the reference voltage VrefA.
  • Resistor 135 is a pull-up resistor for the phototransistor to be activated and is connected to a constant positive voltage V+.
  • the operational amplifier 133 compensates for the ripple of the photocurrent provided by the activated phototransistor 132 upon receiving the optical scanning signal. As a result, a voltage drop occurs across the resistor 136, the variable component of which is a response to the light pulses of the optical scanning signal.
  • the signal obtained on the resistor 136 caused by the pulsations of the photocurrent after passing through the RC circuits 137 and 138, amplifies the differential amplifier 139, the output of which is the output signal 140 of the predefined processing means 121.
  • the outputs of the predefined processing means 121 are provided to the detection switch 122. Examples of outputs of the first and second channels of the predefined processing means 121 are shown in Figures 8a and 8b, respectively.
  • the detection switch 122 is made in the form of an analog switch 2:1, which provides alternating switching of the outputs of the first and second channels of the predefined processing means 121 to the output.
  • the detection switch 122 selects the phototransistor from among the activated phototransistors, the output of which is to be detected.
  • the microcontroller 124 controls the detection switch 122 by means of an appropriate pulse signal, which alternately switches the input signals to the output.
  • An example of the pauseless output signal 141 of the detection switch 122 is shown in Figure 8c.
  • Figure 9 is a block diagram of a preconditioned processing means 123 that includes a cascaded low pass filter 142, a programmable amplifier 143, and a full-wave rectifier 144 with an integration function.
  • the low-pass filter 142 removes high-frequency components of the input signal due to the presence of high-frequency components in the detected signal caused by external influences, as well as interference introduced by the switching circuits of the receiving and detecting device itself.
  • the programmable amplifier 143 performs amplitude normalization of the pulses of the output signal of the low-pass filter 142 to bring it to the amplitude of the input signal of the analog-to-digital converter 121. Normalization is performed by amplifying the input signal with a predetermined gain that is individual for each of the groups of pulses received separately phototransistor. Programming data from microcontroller 125 is sent to programmable amplifier 143 using serial signals 145.
  • the full-wave rectifier 144 converts the software-amplified bipolar signal to a unipolar signal and then integrates it.
  • the output signal 128 of the preconditioned processing means 123 serves as an indicator of the receipt of the optical scanning signal by the current activated phototransistor and its subsequent detection.
  • the analog-to-digital conversion of the preconditioned processing means 123 output 128 is performed using the analog-to-digital conversion module 127 of the microcontroller 124. Based on the digital samples of the signal 128, the microcontroller 124 analyzes the detection of the optical scanning signal. A high level of signal 128 indicates the absence of the detection object on the path of the optical scanning signal. Accordingly, a low level of signal 128 indicates the presence of a detection object on the path of the scanning optical signal.
  • FIG. 10 illustrates a preferred embodiment of a structural arrangement of a device for receiving and detecting an optical scanning signal for scanning the predetermined area. This option of the arrangement is based on the above-described device for receiving and detecting an optical scanning signal for scanning the predetermined area.
  • the layout scheme includes electronic scanning elements 146, a first printed circuit board 147, electronic detecting elements 148, and a second printed circuit board 149.
  • the electronic scanning elements 146 include a plurality of light-receiving elements, in other words, a plurality of 102 light receivers, which are located at the periphery of the predetermined area on the first printed circuit board 147.
  • the electronic scanning elements have a first group 150 of electrical connecting conductors and a second group 151 of electrical connecting conductors.
  • electronic detecting elements 148 include the electronic elements of the addressing component 104 of the light receivers and the electronic elements of the processing component 105, which are located on the second printed circuit board 149.
  • the electronic elements from the set of electronic scanning elements 146 are electrically connected to each other using a conductive pattern, providing a block-line topology of connections and selective addressing of light receivers using an addressing window based on a block-modular addressing principle. Selective addressing and activation of the light receivers are achieved using a first group 150 of electrical connecting conductors and a second group 151 of electrical connecting conductors.
  • the electronic detecting elements 148 contain electronic elements for the above-mentioned selectively addressing the light receivers using the addressing window and selectively activating the addressed light receivers using the activation window. Additionally, the electronic detection elements 148 contain electronic elements for detecting a signal provided by at least one activated light receiver from among the activated light receivers based on the detection window. The electronic detecting elements 148 are electrically connected to the set 146 of scanning electronic elements using the first group 150 of electrical connecting conductors and the second group 151 of electrical connecting conductors.
  • the first printed circuit board 147 and the second printed circuit board 149 are flexible printed circuit boards. Accordingly, the first group of electrical connecting conductors 150 and the second group of electrical connecting conductors 151 are conductors of the flexible printed circuit board.
  • Directly controlling the detection of the optical scanning signal using the first and second groups of electrical connecting conductors, by selectively block-modular addressing of the light receivers, selective activation of the addressed light receivers and selective signal detection from among the signals provided by the activated light receivers when the optical scanning signal is received in each separate physical time slot reduces the duration of the object detection cycle due to the pauseless reception of the optical scanning signal by the light receivers and thereby increases the reliability of detecting an object characterized by dynamics with an intensive change in the direction of movement.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Communication System (AREA)

Abstract

A method for receiving and detecting an optical scanning signal of a predetermined area (options) and a device for its implementation belong to the field of computer technology and are intended for use in infrared systems for detecting an object in the predetermined area. The technical result is to increase the reliability of detecting an object characterized by dynamics with an intensive change of directions of movement. The method includes steps that ensure the placement of a plurality of light receivers on the periphery of the predetermined area and the electrical connection of light receivers with the provision of block topology and addressing based on the addressing window, selectively mapping light receivers in a preconfigured logical time slot with the activation of at least part of the light receivers mapped in the logical time slot to receive an optical scanning signal, selectively mapping a configured logical time slot in more than one physical time slot with the provision of detecting the signal provided by at least one light receiver to receive a scanning signal of the predetermined area.

Description

METHOD FOR RECEIVING AND DETECTING OPTICAL SCANNING SIGNAL (OPTIONS)
AND DEVICE FOR ITS IMPLEMENTATION
FIELD OF TECHNOLOGY
This technical solution relates to the field of computer technology, in particular to the field of technology for touch input of information into a computer and is intended for use as part of human-machine interaction interface devices for computer systems operated in harsh environment, including transport means.
STATE OF THE ART
An interactive touch input device is known from the prior art, disclosed in the US Patent No. 4761637 "Touch input device", patentee: Carroll Touch Inc. (Round Rock,TX), published 08/02/1988. The device contains a set of light detectors electrically connected in a matrix, with each light detector being addressed separately in the matrix, and driver facilities.
This technical solution has a limitation consisting in the use of a sequential activation scheme for light detectors, which determines the significant duration of the activation cycle of the named set of light detectors as a whole and the corresponding response time of the touch input device.
Another known technical solution is an infrared touch system characterized by improved resolution for determining the touch position of the touchscreen, disclosed in patent US6429857 "Apparatus and method to improve resolution of infrared touch systems", patentee: ELO Touchsystems, Inc. (Fremont, CA), published 08/06/2002. The infrared touch system includes the first and second sets of infrared emitters and the first and second sets of infrared receivers, wherein the infrared emitters and infrared receivers are located on the periphery of the touch detection area opposite each other and each infrared receiver is aligned with one opposing infrared emitter, a processor for controlled activation of the first and second sets of infrared emitters and controlled activation of the first and second sets of infrared receivers and calculating the touch position of the touch screen based on sequential on-axis activation of each infrared emitter and the opposing receiver and sequential activation of selected off-axis emitter-receiver pairs.
This technical solution has a limitation consisting in the use of a sequential activation circuit of light emitters and light receivers, which causes a significant duration of the scanning cycle of the touch detection area and, accordingly, a significant response time of the touch system.
Also known technical solution is the optical control system disclosed in the US Patent No. 8426799 "Optical control system with feedback control", patentee: Rapt IP Limited (Gibraltar,GI), published on 04/23/2013. The system contains a plurality of optical emitters and a detection system containing a plurality of optical detectors, wherein a plurality of light emitters and a plurality of light receivers determine the area of optical trajectories provided over a time interval by energy transfer between light emitters and light receivers, and also contains a switch designed to control the detectors.
This technical solution has a limitation, which consists in detecting the presence of an object in the predetermined area based on the sequential activation of light emitters and light receivers. This detection scheme causes a significant duration of the scanning cycle of the predetermined area.
Background of the invention
Among the most important characteristics of object detection systems in a predetermined area, determining their technical level, are the interconnected response time and reliability of object detection. The response time is determined by the duration of the scanning cycle of the detection area. In relation to infrared touch systems, the duration of the scanning cycle consists of the activation time of the light emitter - light receiver pairs during the formation of a grid of detector light beams overlapping the detection area. Moreover, the time interval of the activation cycle of each individual light receiver includes two parts.
The first part of the light receiver activation cycle is a time interval during which transients occur in the activated light receiver caused by the discharge of the charge accumulated in the inactive state and making it impossible to receive a reliable signal at its output provided by the activated light emitter. This time interval is defined as a pause interval.
Accordingly, the second part of the light receiver activation cycle is operational, during which there is reliable reception and, accordingly, reliable detection of a light beam from an activated light emitter. Moreover, the smaller the number of pulses in a separate detector beam of light connecting the light emitter and the light receiver, the greater the proportion of the above-mentioned pause time intervals in the optical scanning signal. For this reason, the use of a sequential activation scheme of individual light receivers, when forming a grid of light detector beams, is ineffective.
The problem, although not fully, is solved by combining the light receivers into blocks and activating them block by block. However, in the case of detecting an object characterized by dynamics with an intensive change of movement directions, the block activation of light receivers should also be considered ineffective. In addition, the problem of reducing the duration of the activation cycle of light emitters and light receivers placed on a specially dedicated separate printed circuit board is in contradiction with the use of an intermodule serial interface to control activation, which additionally increases the duration of the activation cycle of emitter-receiver pairs.
In connection with the above, it is relevant to use optimized activation schemes of light receivers in infrared touch systems, which reduce the time spent on detecting an object characterized by dynamics with an intensive change of movement directions, causing intensive nonlinear addressing of light receivers.
SUMMARY OF THE INVENTION
This technical solution is aimed at eliminating the limitations inherent in solutions known from the prior art.
The technical result is an increase in the reliability of detecting an object characterized by dynamics with an intensive change of movement directions. The specified technical result is achieved by implementing a method for receiving and detecting an optical scanning signal for scanning a predetermined area, comprising the steps of:
- providing the placement of a plurality of light receivers at the periphery of the predetermined area and the electrical connection of the light receivers with the provision of block topology and addressing of the light receivers based on the block-modular principle;
- selectively mapping the light receivers to a pre-configured logical time slot with the provision of at least a part of the mapped light receivers are activated to receive the optical scanning signal;
- selectively mapping the pre-configured logical time slot to more than one physical time slot with the provision of selective detection of a signal provided by at least one activated light receiver, the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal, and the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
In some embodiments of the technical solution the block topology is a block-line topology.
In some embodiments of the technical solution the block-modular principle of addressing is provided using the addressing window.
In some embodiments of the technical solution the configurable logical time slot is a logical time slot selectively associating light receivers with physical time slots.
In some embodiments of the technical solution the block-modular principle of addressing light receivers is based on the sliding window principle.
In some embodiments of the technical solution an activation of at least a part of the mapped light receivers is provided using the activation window.
In some embodiments of the technical solution the activation of at least a part of the mapped light receivers is provided using the activation window, based on the sliding window principle.
In some embodiments of the technical solution selective detection of a signal is provided by at least one activated light receiver using the detection window.
The specified technical result is also achieved by implementing a method for receiving and detecting an optical scanning signal of a predetermined area, comprising the steps of:
- controllably and progressively configuring logical time slots from a plurality of logical time slots belonging to at least one scan frame of the predetermined area using the optical scanning signal, the reception of which is provided by light receivers from a plurality of light receivers located at the periphery of the predetermined area and electrically connected to each other with the provision of block topology and addressing of light receivers, based on the block-modular principle; selectively and progressively mapping the light receivers to configured logical time slots to selectively activate at least a part of the mapped light receivers to receive the optical scanning signal;
- selectively and progressively mapping configured logical time slots to physical time slots from a plurality of physical time slots belonging to at least one scan frame of the predetermined area, providing selective and progressive detection of a signal provided by activated light receivers, the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal, and the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
In some embodiments of the technical solution the addressing of light receivers based on the block-modular addressing principle is provided.
In some embodiments of the technical solution the configured logical time slots are progressively mapped into physical time slots in conjunction with the following of the physical time slots.
In some embodiments of the technical solution the detection of the signal is provided by activated light receivers in conjunction with the following physical time slots.
The specified technical result is also achieved by implementing a device for receiving and detecting an optical scanning signal of a predetermined area, comprising: a set of electronic scanning elements, including at least a plurality of light-receiving elements located in an orderly manner at the periphery of the predetermined area on the first printed circuit board and electrically connected using a conductive pattern providing a block topology of connections and selective addressing of light receivers based on the block-modular principle, and the set of electronic scanning elements has a first group of electrical connecting conductors and a second group of electrical connecting conductors; and
- a set of electronic detecting elements electrically connected to the set of electronic scanning elements using the first group of connecting electrical conductors and the second group of electrical connecting conductors and including electronic elements for selective addressing of light receivers based on the block-modular principle, selective activation of at least part of the addressed light receivers and selective detection of a signal provided by at least one activated light receiver.
In some embodiments of the technical solution the first group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
In some embodiments of the technical solution the second group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
In some embodiments of the technical solution the device further comprises a second printed circuit board and at least part of the set of electronic detecting elements are located on the second printed circuit board.
In some embodiments of the technical solution the first printed circuit board is a flexible printed circuit board.
BRIEF DESCRIPTION OF THE DRAWINGS
The technical solution is described with reference to the figures below. In accordance with generally accepted practice, the presented graphic illustrations and their individual elements are not made on a single scale, including the time scale. The shape and size of various elements of graphic images are arbitrarily increased or decreased in order to improve the clarity of the graphic material when describing the description of the technical solution. Some elements of the images are idealized, while others are simplified. The figures show the following graphical illustrations:
Figure 1 is a block diagram of an infrared system for detecting an object in a predetermined area;
Figure 2 is a flowchart of a procedure for detecting an optical scanning signal of a predetermined area in accordance with the considered technical solution;
Figure 3 is a schematic diagram of the configuration of a logical time slot in relation to the present embodiment of the technical solution;
Figure 4a is a schematic representation of the mapping of light receivers to logical time slots in nonlinear scanning;
Figure 4b is a schematic diagram showing a fragment of mapping logical time slots to physical time slots in nonlinear scanning;
Figure 5 is a block diagram of an apparatus for receiving and detecting an optical scanning signal of a predetermined area in accordance with a contemplated embodiment of the disclosed technical solution;
Figure 6 is a connection diagram of light receivers in accordance with a contemplated embodiment of the disclosed technical solution;
Figure 7 is a functional block diagram of an individual channel of a predetermined processing means;
Figure 8a is a timing diagram of the output signal of the first channel of the predetermined processing means;
Figure 8b is a timing diagram of the output signal of the second channel of the predetermined processing means;
Figure 8c is a timing diagram of the output of the detection switch;
Figure 9 is a block diagram of preconditioned processing means;
Figure 10 is a block diagram illustrating an embodiment of a device for receiving and detecting an optical scanning signal of a predetermined area in accordance with the present embodiment of the technical solution.
DETAILED DESCRIPTION OF THE TECHNICAL SOLUTION
Below are the concepts and definitions necessary to disclose the implemented technical solution.
The physical time slot - the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal.
The logical time slot - a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
Block-line electrical connection topology of light receivers - an electrical connection topology of light receivers according to which the light receivers are connected in blocks lined up in a line.
Block-modular principle of addressing light receivers - a principle of addressing blocks of light receivers, which provides simultaneous addressing of at least two blocks of light receivers at the same time.
Predefined signal processing - the processing of an analog signal with a predetermined set of operations.
Preconditioned signal processing is an analog signal processing with a predetermined set of operations and conditions for their execution.
The technical solution is disclosed by the example of an infrared system for detecting an object, in other words, a pointer, in the predetermined area using an amplitude-modulated optical scanning signal. A typical structure of an infrared detection system is shown in Figure 1. According to Figure 1, the infrared detection system comprises the predetermined detection area 100, a plurality of light emitters 101 such as infrared LEDs, a set of 102 light receivers, such as phototransistors, a component 103 for addressing and activating light emitters, including light emitter drivers, a component 104 for addressing light receivers, including analog multiplexers, and a processor component 105. A plurality of light emitters 101 are located on two adjacent sides of a predetermined detection area 100, and a plurality of light receivers 102 are located on opposite two adjacent sides thereof, and each light receiver is axially aligned with one opposing light emitter. The processing component 105 includes a detector for detecting a signal provided by the light receivers upon receiving the optical scanning signal, and a microcontroller for controlling the operation of the components of the infrared detection system.
Scanning the predetermined area 100 to detect an object 106 is performed by sequentially unfolding a grid 107 of light beams provided by sequential activation of the light emitter-light receiver pairs. The mapping of the grid 107 of light beams to the time axis will be considered as an optical scanning signal.
Figure 2 is a flowchart of a procedure for detecting an optical scanning signal in accordance with the disclosed technical solution. This procedure is performed as follows.
In the first step, at block 108, a plurality of light receivers is placed at the periphery of a predetermined area and electrically connected to each other to provide a block-line topology and a block- modular principle of addressing. With regard to the considered embodiment of the disclosed technical solution, a plurality of light receivers is organized into blocks with the possibility of their addressing using an addressing window that overlaps two light receiver blocks, each of which includes four light receivers.
In the second step, at block 109, the light receivers of the plurality of 102 light receivers are selectively mapped into a segmented configured logical time slot. The segmentation of a logical time slot is based on the mapping of light receivers into it so that each separate segment is intended to map a separate light receiver into it and corresponds to a separate physical time slot.
Figure 3 is a schematic diagram of associating light receivers of a plurality of 102 light receivers with physical time slots 111 using logical time slot 112, in other words, configuring logical time slot
112. The light receivers are addressed using the addressing window
113. In more detail, the configuring of the logical time slot consists in linking the physical time slots, on which the reception and detection of the optical scanning signal should be performed, and the light receivers, which must provide this reception and detection of the optical scanning signal. The light receivers are selectively coupled to physical time intervals by selectively mapping the light receivers to the logical time slot. Then, the logical time slot, in other words, the previously mapped light receivers, is selectively mapped to physical time slots. The processor component 105 provides the linking of light receivers and physical time slots. It is obvious that depending on whether the scanning is linear or non-linear, there will be a linear or non-linear nature of the addressing of the light receivers and the physical time slots in which they are mapped.
The light receivers are mapped to a logical time slot 112 using an addressing window 113 providing selective addressing of the light receivers from the plurality of light receivers 102 and controllably moved over the light receivers in accordance with the sliding window principle. Moreover, the light receivers are mapped to a logical time slot 112 with the provision of activation of at least part of the mapped light receivers. Activation is performed on the basis of an activation window, which is controllably moved over the addressed light receivers.
In the third step in block 110, the logical time slot 112 is selectively and progressively mapped, in other words, the light receivers mapped in it, activated at the previous step, in physical time slots 111. The mapping is performed to ensure the detection of the signal provided in each separate physical time slot by a separate light receiver. Detection is performed using a detection window that provides a selection of one light receiver from among the activated light receivers to detect the signal provided by this light receiver when receiving an optical scanning signal in the current physical time slot.
Figures 4a and 4b are a schematic diagram of an example of the above discussed optical scanning signal fragment with a scan direction change. This example illustrates the detection of a fragment of the optical scanning signal including ten physical time slots labeled PTI(i)...PTI(i+9) using light receivers labeled LD(k+1)...LD(k+3), LD(1+0)...LD(1+3), LD(m), LD(k+2), LD(k+l), belonging to three blocks of light receivers, labeled LD(K), LD (L), LD (M). The association of light receivers with physical time slots is performed using logical time slots 114, 115, 116 denoted as LTI(A), LTI(B), LTI(C).
Figure 4a is a schematic diagram of the selective and progressive mapping of the light receivers LD(K), LD(L), LD(M) to the configured logical time slots 114,115,116, denoted LPT(A), LPT(B), LPT(C), using addressing window 113. Mapping is performed based on block-modular addressing of pairs of light receivers LD(K)-LD(L), LD(L)-LD(M), LD(K)-LD(L), in accordance with the sliding window principle. Mapping is performed to ensure that a part of the light receivers is activated. With regard to the considered embodiment of the technical solution, two light receivers are simultaneously activated, from among the light receivers mapped in each separate logical time slot. The activation of the light receivers is provided using the activation window 117, which is controllably moved over a logical time slot with a step of following their segments. The broken lines show the previous locations of the activation window 117. Vertical arrows indicate selective and time-translational mapping of light emitters to logical time slots.
Figure 4b is a schematic representation of a fragment of the selective and progressively mapping of logical time slots 114,115,116, indicated by LPT(A), LPT(B), LPT(C), to physical time slots 118, indicated by PTI(i+4), PTI(i+5), PTI(i+6), PTI(i+7), PTI(i+8), PTI(i+9). Mapping is performed to ensure sequential detection of the signal provided by the light receivers in the following order LD(k+l), LD(k+2), LD(k+3), LD(1), LD(1+1), LD(l+2), LD(l+3), LD(m), LD(K2), LD(K1) when receiving an optical scanning signal at the following physical time slots PTI(i+4), PTI(i+5), PTI(i+6), PTI(i+7), PTI(i+8), PTI(i+9). Accordingly, mapping is performed using the detection window 119, which is controllably moved across the activated light receivers. The broken lines show the previous locations of the detection window 119. The horizontal arrows indicate the selective and progressive sweep in time of the detection process of the optical scanning signal.
Figure 5 is a block diagram of an apparatus for detecting an optical scanning signal for scanning the predetermined area in accordance with a contemplated embodiment of the disclosed technical solution. The device includes a cascaded addressing circuit 104 for selectively addressing the light receivers, a plurality of 102 light receivers, an activation switch 120 for selectively activating the addressed light receivers, a predefined processing means 121 for preprocessing a signal provided by the light receivers, a detection switch 122 for selectively detecting a signal provided by activated light receivers, preconditioned processing means 123 for detecting a signal provided by the separate light receiver in a separate physical time slot. The detecting device is controlled by a microcontroller 124, which includes a microprocessor 125, an interface module 126 and an analog-to-digital conversion module 127. The output of the preconditioned processing means 123 is coupled to the input of the analog-to-digital conversion module 127 of the microcontroller 124 using signal 128.
Figure 6 illustrates the connection diagram of the light receivers in accordance with the considered implementation of the disclosed technical solution. In accordance with Figure 6, a set 102 of light receivers, such as phototransistors, are interconnected to provide a block-linear topology and a block-modular principle of addressing phototransistors for receiving an optical scanning signal. The phototransistor blocks are addressed using the addressing component 104, which includes two analog multiplexers for independent addressing of two phototransistor blocks simultaneously, respectively. The addressing of phototransistor blocks, in other words, the connection of their emitters to zero potential, is performed using the control signal 129. The signal 129 includes two binary control code words, respectively, of the two analog multiplexers named above. With regard to the considered embodiment of the technical solution, the addressing component 104 provides addressing of the light-receiver module, which includes two blocks of four phototransistors in each block, which provide, respectively, two sets of 130 and 131 output signals received from phototransistor collectors.
The activation switch 120 is made using two analog switches 4:1. Each of the switches provides independent selective switching of one of the four input signals to the output. Each of the analog switches provides switching of the collector of the phototransistor to be activated from the addressed phototransistor block to its output. In relation to the considered embodiment of the technical solution, using the activation window, two phototransistors are simultaneously activated, in other words, part of the addressed light receivers. The microcontroller 124 controls the operation of the activation switch 120 using the corresponding control signal. This signal is a positional code that provides switching of collectors of phototransistors to be activated to the inputs of the two-channel predefined processing means 121.
Figure 7 illustrates a functional diagram of a separate channel of the predefined processing means 121, the input of which is connected through an analog multiplexer of the activation switch 120 to the collector of the activated phototransistor 132. The circuit includes a voltage regulator and a differential amplifier connected in series. The voltage regulator is a precision shunt voltage regulator and is made using an operational amplifier 133, a transistor 134, and resistors 135 and 136. The voltage regulator provides a regulated voltage to the collector of the activated phototransistor, obtained across the resistor 135 and determined by the reference voltage VrefA. Resistor 135 is a pull-up resistor for the phototransistor to be activated and is connected to a constant positive voltage V+. By stabilizing the voltage across the pull-up resistor 135, the operational amplifier 133 compensates for the ripple of the photocurrent provided by the activated phototransistor 132 upon receiving the optical scanning signal. As a result, a voltage drop occurs across the resistor 136, the variable component of which is a response to the light pulses of the optical scanning signal. The signal obtained on the resistor 136 caused by the pulsations of the photocurrent, after passing through the RC circuits 137 and 138, amplifies the differential amplifier 139, the output of which is the output signal 140 of the predefined processing means 121. The outputs of the predefined processing means 121 are provided to the detection switch 122. Examples of outputs of the first and second channels of the predefined processing means 121 are shown in Figures 8a and 8b, respectively.
With regard to the considered embodiment of the technical solution, the detection switch 122 is made in the form of an analog switch 2:1, which provides alternating switching of the outputs of the first and second channels of the predefined processing means 121 to the output. In other words, the detection switch 122 selects the phototransistor from among the activated phototransistors, the output of which is to be detected. The microcontroller 124 controls the detection switch 122 by means of an appropriate pulse signal, which alternately switches the input signals to the output. An example of the pauseless output signal 141 of the detection switch 122 is shown in Figure 8c. Figure 9 is a block diagram of a preconditioned processing means 123 that includes a cascaded low pass filter 142, a programmable amplifier 143, and a full-wave rectifier 144 with an integration function.
The low-pass filter 142 removes high-frequency components of the input signal due to the presence of high-frequency components in the detected signal caused by external influences, as well as interference introduced by the switching circuits of the receiving and detecting device itself.
The programmable amplifier 143 performs amplitude normalization of the pulses of the output signal of the low-pass filter 142 to bring it to the amplitude of the input signal of the analog-to-digital converter 121. Normalization is performed by amplifying the input signal with a predetermined gain that is individual for each of the groups of pulses received separately phototransistor. Programming data from microcontroller 125 is sent to programmable amplifier 143 using serial signals 145.
The full-wave rectifier 144 converts the software-amplified bipolar signal to a unipolar signal and then integrates it.
The output signal 128 of the preconditioned processing means 123 serves as an indicator of the receipt of the optical scanning signal by the current activated phototransistor and its subsequent detection.
The analog-to-digital conversion of the preconditioned processing means 123 output 128 is performed using the analog-to-digital conversion module 127 of the microcontroller 124. Based on the digital samples of the signal 128, the microcontroller 124 analyzes the detection of the optical scanning signal. A high level of signal 128 indicates the absence of the detection object on the path of the optical scanning signal. Accordingly, a low level of signal 128 indicates the presence of a detection object on the path of the scanning optical signal.
Figure 10 illustrates a preferred embodiment of a structural arrangement of a device for receiving and detecting an optical scanning signal for scanning the predetermined area. This option of the arrangement is based on the above-described device for receiving and detecting an optical scanning signal for scanning the predetermined area. The layout scheme includes electronic scanning elements 146, a first printed circuit board 147, electronic detecting elements 148, and a second printed circuit board 149. The electronic scanning elements 146 include a plurality of light-receiving elements, in other words, a plurality of 102 light receivers, which are located at the periphery of the predetermined area on the first printed circuit board 147. Moreover, the electronic scanning elements have a first group 150 of electrical connecting conductors and a second group 151 of electrical connecting conductors. Accordingly, electronic detecting elements 148 include the electronic elements of the addressing component 104 of the light receivers and the electronic elements of the processing component 105, which are located on the second printed circuit board 149.
In accordance with the disclosed technical solution, the electronic elements from the set of electronic scanning elements 146 are electrically connected to each other using a conductive pattern, providing a block-line topology of connections and selective addressing of light receivers using an addressing window based on a block-modular addressing principle. Selective addressing and activation of the light receivers are achieved using a first group 150 of electrical connecting conductors and a second group 151 of electrical connecting conductors.
Accordingly, the electronic detecting elements 148 contain electronic elements for the above-mentioned selectively addressing the light receivers using the addressing window and selectively activating the addressed light receivers using the activation window. Additionally, the electronic detection elements 148 contain electronic elements for detecting a signal provided by at least one activated light receiver from among the activated light receivers based on the detection window. The electronic detecting elements 148 are electrically connected to the set 146 of scanning electronic elements using the first group 150 of electrical connecting conductors and the second group 151 of electrical connecting conductors.
With respect to this embodiment of the disclosed technical solution, the first printed circuit board 147 and the second printed circuit board 149 are flexible printed circuit boards. Accordingly, the first group of electrical connecting conductors 150 and the second group of electrical connecting conductors 151 are conductors of the flexible printed circuit board.
The use of selective block-modular addressing of light receivers, selective activation of addressed light receivers and selective detection of a signal from among the signals provided by activated light receivers when receiving an optical scanning signal in each separate physical time slot reduces the duration of the object detection cycle due to the pauseless optical scanning signal by light receivers and thereby increases the reliability of detecting an object characterized by dynamics with an intensive change in the direction of movement.
Directly controlling the detection of the optical scanning signal using the first and second groups of electrical connecting conductors, by selectively block-modular addressing of the light receivers, selective activation of the addressed light receivers and selective signal detection from among the signals provided by the activated light receivers when the optical scanning signal is received in each separate physical time slot reduces the duration of the object detection cycle due to the pauseless reception of the optical scanning signal by the light receivers and thereby increases the reliability of detecting an object characterized by dynamics with an intensive change in the direction of movement.
The above embodiment of the disclosed technical solution is to be understood as an illustrative example of the technical solution under consideration. Accordingly, the present technical solution is not limited to the above preferred embodiment and is subject to various modifications and changes without departing from its stated scope in the claims.

Claims

1. A method for receiving and detecting an optical scanning signal, comprising the steps of:
- providing the placement of a plurality of light receivers at the periphery of the predetermined area and the electrical connection of the light receivers with the provision of block topology and addressing of the light receivers based on the block-modular principle;
- selectively mapping the light receivers to the pre-configured logical time slot with the provision of at least a part of the mapped light receivers are activated to receive the optical scanning signal;
- selectively mapping the pre-configured logical time slot to more than one physical time slot with the provision of selective detection of a signal provided by at least one activated light receiver, the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal, and the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
2. The method according to claim 1, wherein the block topology is a block-line topology.
3. The method according to claim 1, wherein the block-modular principle of addressing is provided using the addressing window.
4. The method according to claim 1, wherein the configurable logical time slot is a logical time slot selectively associating light receivers with physical time slots.
5. The method according to claim 3, wherein the block-modular principle of addressing light receivers is based on the sliding window principle.
6. The method according to claim 1, wherein an activation of at least a part of the mapped light receivers is provided using the activation window.
7. The method according to claim 8, wherein the activation of at least a part of the mapped light receivers is provided using the activation window, based on the sliding window principle.
8. The method according to claim 1, wherein selective detection of a signal is provided by at least one activated light receiver using the detection window.
9. A method for receiving and detecting an optical scanning signal, comprising the steps of:
- controllably and progressively configuring logical time slots from a plurality of logical time slots belonging to at least one scan frame of the predetermined area using an optical scanning signal, the reception of which is provided by light receivers from a plurality of light receivers located at the periphery of the predetermined area and electrically connected to each other with the provision of block topology and addressing of light receivers, based on the block-modular principle; selectively and progressively mapping the light receivers to configured logical time slots to selectively activate at least a part of the mapped light receivers to receive the optical scanning signal;
- selectively and progressively mapping configured logical time slots to physical time slots from a plurality of physical time slots belonging to at least one scan frame of the predetermined area, providing selective and progressive detection of a signal provided by activated light receivers, the physical time slot is the sampling time slot of the optical scanning signal, allowing a separate light receiver to be activated to receive the optical scanning signal, and the logical time slot is a logical combination of two or more physical time slots for associating the physical time slots with light receivers.
10. The method according to claim 9, wherein addressing of light receivers based on the block-modular addressing principle is provided.
11. The method according to claim 9, wherein the configured logical time slots are progressively mapped into physical time slots in conjunction with the following of the physical time slots.
12. The method according to claim 9, wherein the detection of the signal is provided by activated light receivers in conjunction with the following physical time slots.
13. A device for receiving and detecting an optical scanning signal, comprising:
- a set of electronic scanning elements, including at least a plurality of light-receiving elements located in an orderly manner at the periphery of the predetermined area on the first printed circuit board and electrically connected using a conductive pattern providing a block topology of connections and selective addressing of light receivers based on the block-modular principle, and the set of electronic scanning elements has a first group of electrical connecting conductors and a second group of electrical connecting conductors; and
- a set of electronic detecting elements electrically connected to the set of electronic scanning elements using the first group of connecting electrical conductors and the second group of electrical connecting conductors and including electronic elements for selective addressing of light receivers based on the block-modular principle, selective activation of at least part of the addressed light receivers and selective detection of a signal provided by at least one activated light receiver.
14. The device according to claim 13, wherein the first group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
15. The device according to claim 13, wherein the second group of electrical connecting conductors is made using conductors selected from the group consisting of printed circuit board conductors, flexible printed circuit board conductors, flexible flat cable conductors and any suitable combination of the above conductors.
16. The device according to claim 13, additionally comprising the second printed circuit board and at least part of the set of electronic detecting elements are located on the second printed circuit board.
17. The device according to claim 13, wherein the first printed circuit board is a flexible printed circuit board.
PCT/RU2022/050070 2021-03-05 2022-03-04 Method for receiving and detecting optical scanning signal (options) and device for its implementation WO2022186731A2 (en)

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