CN111352540B - Method and device for detecting outer frame of infrared touch screen - Google Patents
Method and device for detecting outer frame of infrared touch screen Download PDFInfo
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- CN111352540B CN111352540B CN201910446182.8A CN201910446182A CN111352540B CN 111352540 B CN111352540 B CN 111352540B CN 201910446182 A CN201910446182 A CN 201910446182A CN 111352540 B CN111352540 B CN 111352540B
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- 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
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Abstract
The invention discloses a detection method of an outer frame of an infrared touch screen, which comprises the following steps: triggering touch control, and receiving infrared signals sent by the blocked infrared pair tubes; according to the infrared signals, determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point; and analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions, and displaying the detection result. The invention also provides a device applied to the detection method of the outer frame of the infrared touch screen, which comprises: the touch control unit is used for triggering touch control; an infrared light receiving unit for receiving an infrared light signal; the computing unit is used for determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point according to the infrared signals; the analysis unit is used for analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions to obtain a detection result; and the display unit is used for displaying the detection result.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a detection method and device for an outer frame of an infrared touch screen.
Background
The touch technology of the large education screen is realized by adopting an infrared technology, and the large education screen consists of an infrared transmitter assembly and a receiving sensing element which are arranged on an outer frame of the touch screen. An infrared detection network is formed on the surface of the screen, any touch object can change the transmission of infrared rays on the contact point, and the operation effect of the touch screen is realized by calculating the transmission distance.
After the production of the current factory, the qualification of the outer frame is often tested through artificial body sense or simple multi-point touch equipment, and the problem existing in the touch area is difficult to detect by the detection method. Once the touch response of the large screen device is not sensitive enough, the large screen device needs to be reworked. The weight of the large education screen reaches 100KG, the freight rate is high during repair, and the cost is huge. Therefore, a detection method and a detection device for improving the detection accuracy of large-screen equipment are needed.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an apparatus and a method for improving the detection efficiency of an outer frame of an infrared touch screen.
Based on the above object, the method for detecting the outer frame of the infrared touch screen provided by the invention comprises the following steps:
triggering touch control, and receiving infrared signals sent by the blocked infrared pair tubes;
according to the infrared signals, determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point;
and analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions, and displaying the detection result.
In one embodiment, the step of determining the infrared receiving frequency of the touch point, the success rate of infrared receiving includes:
And converting the infrared signals into electric signals, identifying the times of the received infrared rays, and calculating the infrared ray receiving frequency and the infrared ray receiving success rate in the preset time.
In one embodiment, the ir reception success rate is a percentage of the number of ir emissions received and the theoretical number of ir emissions within a predetermined time.
In one embodiment, the preset time is 0.1 to 10 seconds.
In one embodiment, the step of determining the coordinate position of the touch point includes:
calculating the difference between the time of receiving the infrared signal and the time of transmitting the infrared signal by the blocked infrared pair tube, and calculating the transmission distance of the infrared ray;
Calculating the difference value between the width of the screen and the transmission distance to obtain the coordinate position of the touch point in the X-axis direction of the screen;
and calculating the difference value between the length of the screen and the transmission distance to obtain the coordinate position of the touch point in the Y-axis direction of the screen.
In one embodiment, the step of analyzing the success rate of receiving the infrared ray at the same coordinate position and the frequency of receiving the infrared ray at different coordinate positions, and displaying the detection result includes:
when the difference value of the infrared receiving frequencies corresponding to different coordinate positions is larger than a preset difference value, and/or when the infrared receiving power of the same coordinate position is smaller than a preset receiving success rate, the infrared receiving power is displayed as unqualified;
and displaying the received power of the infrared receiver at the same coordinate position as qualified when the difference of the infrared receiving frequencies corresponding to different coordinate positions is not larger than a preset difference value and the received power of the infrared receiver at the same coordinate position is not larger than a preset receiving success rate.
In one embodiment, the preset difference is 2% -5%; the preset success rate of receiving is 97-99%.
In one embodiment, the step of analyzing the infrared receiving frequencies at different positions and determining whether the outer frame is qualified further includes:
And the coordinate positions of the touch points are in one-to-one correspondence with the infrared receiving frequency and the infrared receiving power.
The invention also provides a device applied to the detection method of the outer frame of the infrared touch screen, which comprises:
The touch control unit is used for triggering touch control;
an infrared light receiving unit for receiving an infrared light signal;
the computing unit is used for determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point according to the infrared signals;
the analysis unit is used for analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions to obtain a detection result;
and the display unit is used for displaying the detection result.
The present invention also provides an electronic device including: a processor, a memory, a display, a bus, and a computer program stored on the memory and executable on the processor;
the processor, the memory and the display complete the communication with each other through the bus;
The processor, when executing the computer program, implements the method as described above.
From the above, the method and the device for detecting the outer frame of the infrared touch screen provided by the invention can calculate the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point by receiving the infrared signal and according to the infrared signal; comparing the infrared receiving success rate of the same coordinate position with the preset success rate, and comparing the difference value of the infrared receiving frequency of the same coordinate position with the difference value of the preset receiving frequency; when the infrared receiving success rate is not more than the preset success rate, and/or the difference value of the infrared receiving frequencies is not more than the difference value of the preset receiving frequencies, displaying that the infrared receiving success rate is unqualified; and when the infrared receiving success rate is not more than the preset success rate, and the difference value of the infrared receiving frequencies is not more than the difference value of the preset receiving frequencies, displaying the infrared receiving success rate as qualified. The sensitivity of the outer frame of the infrared touch screen can be detected rapidly and effectively, detection time and labor input in detection are saved, repair rate is reduced, and cost is reduced.
Drawings
Fig. 1 is a flowchart of a method for detecting an outer frame of an infrared touch screen according to an embodiment of the present invention.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1, the present invention provides a method for detecting an outer frame of an infrared touch screen, including:
S100, triggering touch control, and receiving infrared signals sent by blocked infrared geminate transistors;
s200, according to the infrared signals, determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point;
S300, analyzing the infrared ray receiving success rate of the same coordinate position, and displaying the detection result at the infrared ray receiving frequencies of different coordinate positions.
In step S100, after triggering the touch at a certain position of the infrared touch screen, the infrared touch screen can receive the touch and send an infrared signal to the pipe through the blocked infrared pipe arranged on the frame of the infrared touch screen.
In one embodiment, the touch is triggered by the detection means. For example, when the detection device is placed on the infrared touch screen, touch control can be generated, and transmission of infrared rays at the placement position of the detection device is blocked.
In step S200, the method may include converting the infrared signal received in step S100 into an electrical signal, and identifying the number of times of the received infrared ray according to the electrical signal. And according to the times, the infrared receiving frequency in the preset time is calculated.
Optionally, the number of times of the received infrared rays is recorded, and the success rate of the reception of the infrared rays within a preset time is calculated according to the value of the number of times. The receiving success rate is the ratio of the number of times of the received infrared rays in the preset time to the preset theoretical receiving number.
The preset time may be set to 0.1 to 10 seconds to improve the efficiency of detection.
Optionally, the step of determining the coordinate position of the touch point includes: and receiving the first coordinate position of the touch point sent by the infrared touch screen. The first coordinate position comprises a first coordinate position in the X axial direction of the horizontal axis and a first coordinate position in the Y axial direction of the vertical axis.
Specifically, after touch control is triggered, the outer frame of the infrared touch screen detects and positions touch points by using an infrared transmitting tube matrix and a receiving tube matrix densely distributed in the directions of the X axis and the Y axis of the horizontal axis. When scanning, one infrared ray is found and confirmed to be blocked in one axial direction, and then the scanning is switched to the other axial direction for rescanning, the other axial direction can be found to be blocked by one infrared ray, and then the positions of the two infrared geminate transistors which are found to be blocked are reported to a host. The computer can calculate the time difference between the infrared transmitting infrared signal and the infrared receiving infrared signal of the pair of pipes and calculate the transmission distance of the infrared rays. Calculating the difference value between the width of the screen and the transmission distance to obtain a first coordinate position of the touch point in the X axis direction of the screen; and calculating the difference value between the length of the screen and the transmission distance to obtain a first coordinate position of the touch point in the Y-axis direction of the screen.
In another embodiment, the step of determining the coordinate position of the touch point includes: and calculating a second coordinate position of the touch point. The calculation may be performed in a calculation unit of the detection device. The method comprises the steps of receiving the position of a touch point sent by a host, namely the position of an infrared pair of tubes, and calculating the coordinate position of the touch point according to the length and the width of a screen input in advance. Calculating the difference between the time of receiving the infrared signal and the time of transmitting the infrared signal by the blocked infrared pair tube, and calculating the transmission distance of the infrared ray; calculating the difference value between the width of the screen and the transmission distance to obtain a second coordinate position of the touch point in the X axis direction of the screen; and calculating the difference value between the length of the screen and the transmission distance to obtain a second coordinate position of the touch point in the Y-axis direction of the screen.
Before the step of calculating the difference between the time of receiving the infrared signal and the time of emitting the infrared signal by the blocked infrared pair of tubes, the method can further comprise the step of reading the time of receiving the infrared signal and the time of emitting the infrared signal by the infrared pair of tubes.
After step S200, before step S300, the method may further include one-to-one correspondence between the coordinate position of the touch point, the infrared receiving frequency and the infrared receiving power, so as to facilitate subsequent analysis and improve analysis efficiency. The coordinate position is a second coordinate position.
In step S300, when the difference of the infrared receiving frequencies corresponding to the different coordinate positions is greater than the preset difference value, and/or when the infrared receiving power of the same coordinate position is less than the preset receiving success rate, the infrared receiving power is displayed as unqualified. And if and only if the difference of the infrared receiving frequencies corresponding to the different coordinate positions is not larger than the preset difference value, and the infrared receiving power of the same coordinate position is not larger than the preset receiving success rate, displaying that the infrared receiving power is qualified. The coordinate position is a second coordinate position.
The preset difference value of the infrared receiving frequencies corresponding to the different second coordinate positions is 2% -5%. In the numerical range, the quality performance of the infrared transmitting tube is tested, and the performance of the outer frame of the infrared touch screen can be well managed.
The preset infrared receiving power corresponding to the same second coordinate position is 97-99%. The preset difference is too large or too small, and the sensitivity of the outer frame cannot be well detected.
Optionally, step S300 further includes comparing the first coordinate position with the second coordinate position, analyzing whether the values are the same, and calculating the difference ratio. Specifically, the difference ratio is a percentage of the number of coordinate positions having different values to the total number of coordinate positions. And when the percentage exceeds the preset percentage, the method is displayed as unqualified. The preset percentage is 2% -5%. The preset difference is too large or too small, and the sensitivity of the outer frame cannot be well detected.
Correspondingly, the judging process in step S300 should be that when the difference of the infrared receiving frequencies corresponding to the different coordinate positions is greater than the preset difference, and/or when the infrared receiving power of the same coordinate position is less than the preset receiving success rate, and/or when the difference ratio of the first coordinate position and the second coordinate position exceeds the preset percentage, the infrared receiving power is displayed as unqualified. And if and only if the difference of the infrared receiving frequencies corresponding to the different coordinate positions is not more than a preset difference value, and the infrared receiving power of the same coordinate position is not more than a preset receiving success rate, and the difference ratio of the first coordinate position and the second coordinate position is not more than a preset percentage, displaying the qualified product.
The invention also provides a detection device applied to the detection method of the outer frame of the infrared touch screen, which comprises:
The touch control unit is used for triggering touch control;
an infrared light receiving unit for receiving an infrared light signal;
the computing unit is used for determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point according to the infrared signals;
the analysis unit is used for analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions to obtain a detection result;
and the display unit is used for displaying the detection result.
The detection device can be arranged on the display screen in a bonding, adsorption and other modes. The touch control unit can be a probe, an electromagnetic pen point or a handwriting pen point. The display unit may be a display, a cathode ray tube display (CRT), a plasma display PDP, a liquid crystal display LCD, or the like.
Alternatively, the detection device is a structure with a probe. When the touch control device is used, the probe structure is fixed on the large education screen through the sticking buckle structure, and then touch control is triggered.
The present invention also provides an electronic device including: a processor, a memory, a display, a bus, and a computer program stored on the memory and executable on the processor;
the processor, the memory and the display complete the communication with each other through the bus;
The processor, when executing the computer program, implements the method as described above.
The detection device of the outer frame of the infrared touch screen is synchronous with the time of the infrared touch screen. Before using the detection device, the real-time recording time of the device can be detected by a computer program, and the real-time recording time of the infrared touch screen is detected, compared and if necessary adjusted so that the detection device is synchronized with the time of the infrared touch screen. The detection device may also be used to input the dimensions of the infrared touch screen, including width and length, and model number, via a computer program. The infrared touch screens with multiple models can be input, so that the application universality of the detection device is improved, and the detection of the large educational screen with different sizes corresponding to various application scenes is met.
It should be noted that the frequency and success rate of receiving the infrared ray by the detection device are the frequency and success rate of transmitting the infrared ray by the outer frame of the infrared touch screen, so that the frequency and success rate are substantially the same. Therefore, whether the frequency and the success rate of infrared emission of the outer frame of the infrared touch screen accord with theoretical values or not can be judged through the frequency and the success rate of infrared ray receiving received by the detection device, and whether the outer frame of the infrared touch screen is qualified or not can be detected.
When the device is used, the touch control can be initiated at the contact position of the device and the infrared touch screen through the touch control unit of the device when the device is placed on the infrared touch screen type education large screen through the sticking buckle. At this time, the detection device and the infrared touch screen both record the same first time, and the first time is the time when the infrared touch screen transmits an infrared signal. The infrared light receiving unit of the detection device can receive infrared light emitted by the frame of the infrared touch screen and record the time of receiving the infrared light, and the time is recorded as second time. The infrared transmitting tube matrix of the frame of the infrared touch screen can find that one infrared ray is blocked in the X-axis direction after scanning, and can find that one infrared ray is blocked in the Y-axis direction after switching to the Y-axis direction for rescanning. And confirming the positions of the two infrared geminate transistors which are found to be blocked, and reporting the positions to a host. The host computer of detection device sends the position of infrared geminate transistors to detection device, and detection device's calculation element can calculate infrared light's transmission time through the difference of the first time of record and second time to through the formula, transmission distance = transmission time x transmission speed, can calculate infrared light's transmission distance. The transmission distance of infrared light is subtracted from the width of the large screen input in advance in the calculation unit, so that the coordinate value of the touch point on the X axis can be calculated; and subtracting the transmission distance of the infrared light according to the length of the large screen input in advance, and calculating to obtain the coordinate value of the touch point on the Y axis. The calculation unit can also recognize the number of times of the received infrared rays according to the electric signals, calculate the frequency of the infrared ray reception within 1s, and calculate the ratio of the number of times of the received infrared rays within 1s to the preset theoretical number of times of the reception. The analysis unit corresponds the coordinate position and the receiving frequency, analyzes whether the receiving frequencies of different coordinate positions are the same, and analyzes the receiving frequency and the receiving success rate of the same coordinate position. And when the receiving frequencies of different coordinate positions have a difference of more than 2-5%, and/or the receiving success rate of the same coordinate position is less than 97-99%, the receiving frequencies are displayed as unqualified in the display unit. And when the difference of the receiving frequencies of different coordinate positions is not more than 2% -5%, and the receiving success rate of the same coordinate position is not less than 97% -99%, displaying the same coordinate position as qualified in the display unit.
According to the detection method and device for the outer frame of the infrared touch screen, the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point are calculated according to the infrared signals; comparing the infrared receiving success rate of the same coordinate position with the preset success rate, and comparing the difference value of the infrared receiving frequency of the same coordinate position with the difference value of the preset receiving frequency; when the infrared receiving success rate is not more than the preset success rate, and/or the difference value of the infrared receiving frequencies is not more than the difference value of the preset receiving frequencies, displaying that the infrared receiving success rate is unqualified; and when the infrared receiving success rate is not more than the preset success rate, and the difference value of the infrared receiving frequencies is not more than the difference value of the preset receiving frequencies, displaying the infrared receiving success rate as qualified. The sensitivity of the outer frame of the infrared touch screen can be detected rapidly and effectively, detection time and labor input in detection are saved, repair rate is reduced, and cost is reduced.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the invention. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (10)
1. The method for detecting the outer frame of the infrared touch screen is characterized by comprising the following steps of:
triggering touch control, and receiving infrared signals sent by the blocked infrared pair tubes; wherein the touch control is triggered by the detection device; when the detection device is placed on the infrared touch screen, touch control is generated, and transmission of infrared rays at the placement position of the detection device is blocked; an infrared transmitting tube matrix of an outer frame of the infrared touch screen finds that one infrared ray is blocked in one axial direction after scanning, and meanwhile, switches to another axial direction for rescanning, and finds that the other axial direction also has one infrared ray blocked; confirming the positions of the two infrared geminate transistors which are found to be blocked, and reporting the positions;
according to the infrared signals, determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point;
and analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions, and displaying the detection result.
2. The method for detecting an outer frame of an infrared touch screen according to claim 1, wherein the step of determining an infrared receiving frequency of the touch point, the infrared receiving success rate comprises:
And converting the infrared signals into electric signals, identifying the times of the received infrared rays, and calculating the infrared ray receiving frequency and the infrared ray receiving success rate in the preset time.
3. The method for detecting an outer frame of an infrared touch screen according to claim 2, wherein the infrared ray receiving success rate is a percentage of the number of times of receiving infrared rays and the theoretical number of times of infrared ray emission within a preset time.
4. The method for detecting an outer frame of an infrared touch screen according to claim 3, wherein the preset time is 0.1-10 s.
5. The method for detecting an outer frame of an infrared touch screen according to claim 1, wherein the step of determining the coordinate position of the touch point comprises:
calculating the difference between the time of receiving the infrared signal and the time of transmitting the infrared signal by the blocked infrared pair tube, and calculating the transmission distance of the infrared ray;
Calculating the difference value between the width of the screen and the transmission distance to obtain the coordinate position of the touch point in the X-axis direction of the screen;
and calculating the difference value between the length of the screen and the transmission distance to obtain the coordinate position of the touch point in the Y-axis direction of the screen.
6. The method for detecting an outer frame of an infrared touch screen according to claim 1, wherein the step of analyzing the infrared receiving success rate of the same coordinate position, the infrared receiving frequencies of different coordinate positions, and displaying the detection result comprises:
when the difference value of the infrared receiving frequencies corresponding to different coordinate positions is larger than a preset difference value, and/or when the infrared receiving power of the same coordinate position is smaller than a preset receiving success rate, the infrared receiving power is displayed as unqualified;
And displaying the received power of the infrared receiver at the same coordinate position as qualified when the difference of the infrared receiving frequencies corresponding to the different coordinate positions is not more than a preset difference value and the received power of the infrared receiver at the same coordinate position is not less than a preset receiving success rate.
7. The method for detecting the outer frame of the infrared touch screen according to claim 6, wherein the preset difference is 2% -5%; the preset success rate of receiving is 97-99%.
8. The method for detecting an outer frame of an infrared touch screen according to claim 2, wherein the step of analyzing the infrared receiving frequencies at different positions to determine whether the outer frame is acceptable further comprises:
And the coordinate positions of the touch points are in one-to-one correspondence with the infrared receiving frequency and the infrared receiving power.
9. A device for applying the method for detecting the outer frame of the infrared touch screen according to any one of claims 1 to 8, wherein when the device is placed on the infrared touch screen, touch control is generated to block transmission of infrared rays at the place where the device is placed; an infrared transmitting tube matrix of an outer frame of the infrared touch screen finds that one infrared ray is blocked in one axial direction after scanning, and meanwhile, switches to another axial direction for rescanning, and finds that the other axial direction also has one infrared ray blocked; confirming the positions of the two infrared geminate transistors which are found to be blocked, and reporting the positions; the device comprises:
The touch control unit is used for triggering touch control;
an infrared light receiving unit for receiving an infrared light signal;
the computing unit is used for determining the infrared receiving frequency, the infrared receiving success rate and the coordinate position of the touch point according to the infrared signals;
the analysis unit is used for analyzing the infrared ray receiving success rate of the same coordinate position and the infrared ray receiving frequency of different coordinate positions to obtain a detection result;
and the display unit is used for displaying the detection result.
10. An electronic device, comprising: a processor, a memory, a display, a bus, and a computer program stored on the memory and executable on the processor;
the processor, the memory and the display complete the communication with each other through the bus;
The processor, when executing the computer program, implements the method of any of claims 1-8.
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| CN104182092A (en) * | 2014-08-04 | 2014-12-03 | 深圳市巨浪科教设备有限公司 | Positioning method and system for infrared touch screen |
| CN106484196A (en) * | 2016-10-13 | 2017-03-08 | 广州视睿电子科技有限公司 | A kind of touch control detecting method based on infrared light and device |
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