CN211742090U - Infrared touch screen and coverage detection device thereof - Google Patents
Infrared touch screen and coverage detection device thereof Download PDFInfo
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- CN211742090U CN211742090U CN201922151214.XU CN201922151214U CN211742090U CN 211742090 U CN211742090 U CN 211742090U CN 201922151214 U CN201922151214 U CN 201922151214U CN 211742090 U CN211742090 U CN 211742090U
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Abstract
The utility model discloses an infrared touch screen and a coverage detection device thereof, wherein the infrared touch screen comprises a touch screen body and an infrared touch screen coverage detection device; the infrared touch screen covering detection device is connected with the touch screen body and used for acquiring the state whether the touch screen body is shielded or not. The infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit; each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube; the input end of the covering detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the covering detection circuit outputs a signal representing the shielding state of the infrared receiving tube. The utility model provides an infrared touch screen and cover detection device thereof can acquire the state data of touch screen, be in the shrink hidden state including the touch screen and still be in and expand the user state to follow-up carry out intelligent control to it.
Description
Technical Field
The utility model belongs to the technical field of the touch-sensitive screen, a infrared touch-sensitive screen is related to, especially, relate to an infrared touch-sensitive screen and cover detection device thereof.
Background
The infrared touch screen comprises an infrared transmitting and receiving sensing element arranged on the outer frame of the touch screen, an infrared detection network is formed on the surface of the screen, and any touch object can change the infrared rays on the contact points to realize the operation of the touch screen. The infrared touch screen is implemented on the principle similar to the surface acoustic wave touch screen, and uses infrared emitting and receiving sensing elements. The elements form an infrared detection network on the surface of the screen, and an object (such as a finger) operated by touch can change the infrared ray of a touch point and further be converted into a coordinate position of touch to realize the response of the operation. On the infrared touch screen, the circuit board devices arranged on four sides of the screen are provided with infrared transmitting tubes and infrared receiving tubes, and the infrared transmitting tubes and the infrared receiving tubes correspondingly form a transverse and vertical crossed infrared matrix.
In some application modes, for example, in the application of a pull-out whiteboard, the existing infrared touch screen cannot be used, or the whiteboard is in a retracted hidden state or an extended state, which brings inconvenience to the intelligent control of the device.
In view of the above, there is an urgent need to design a new infrared touch screen to overcome the above-mentioned defects of the existing touch screen.
SUMMERY OF THE UTILITY MODEL
The utility model provides an infrared touch screen and cover detection device thereof can acquire the state data of touch screen, be in the shrink hidden state including the touch screen and still be in and expand the user state.
For solving the technical problem, according to the utility model discloses an aspect adopts following technical scheme:
an infrared touch screen comprises a touch screen body and an infrared touch screen covering detection device;
the touch screen body comprises a plurality of infrared geminate transistors, and each infrared geminate transistor comprises an infrared transmitting tube and an infrared receiving tube;
the infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity;
the input end of the coverage detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the coverage detection circuit outputs a signal representing the shielding state of the infrared receiving tube;
the coverage detection circuit comprises a plurality of comparators, wherein the positive phase input end of each comparator is connected with the corresponding signal intensity detection circuit, the negative phase input end of each comparator is connected with a set reference signal, and the output end of each comparator outputs a signal representing the shielding state of the corresponding infrared geminate transistor.
An infrared touch screen comprises a touch screen body and an infrared touch screen covering detection device;
the touch screen body comprises a plurality of infrared geminate transistors, and each infrared geminate transistor comprises an infrared transmitting tube and an infrared receiving tube;
the infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the input end of the covering detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the covering detection circuit outputs a signal representing the shielding state of the infrared receiving tube.
As an embodiment of the present invention, the signal strength detection circuit includes a sampling circuit, an analog-to-digital conversion circuit, and a signal strength conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal strength conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal strength.
As an embodiment of the present invention, the covering detection circuit includes a plurality of first comparators, the signal strength detection circuit that corresponds is connected to the normal phase input of each first comparator, and the reference signal of settlement is connected to the inverting input of each first comparator, and the output representation of each first comparator corresponds the signal that infrared geminate transistors sheltered from the state.
As an embodiment of the present invention, the infrared touch screen coverage detection device further includes a shielding object boundary line acquisition circuit for judging the shielding object boundary line according to the signal intensity detected by each signal intensity detection circuit.
As an embodiment of the present invention, the infrared touch screen coverage detection device further includes a shielding boundary line obtaining circuit for determining a shielding boundary line according to the signal intensity detected by each signal intensity detection circuit; the shelter boundary line acquisition circuit comprises a plurality of second comparators, wherein the positive phase input end and the negative phase input end of each second comparator are respectively connected with the output ends of two first comparators used for detecting and connecting adjacent infrared receiving tubes, and the output ends of the second comparators output signals representing whether the sheltered states of the two adjacent infrared receiving tubes are the same or not.
As an embodiment of the utility model, infrared touch-sensitive screen is still including hiding the device, each infrared geminate transistor set up in the touch-sensitive screen body, the touch-sensitive screen body can contract in hide in the device.
An infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity;
the input end of the coverage detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the coverage detection circuit outputs a signal representing the shielding state of the infrared receiving tube;
the coverage detection circuit comprises a plurality of comparators, wherein the positive phase input end of each comparator is connected with the corresponding signal intensity detection circuit, the negative phase input end of each comparator is connected with a set reference signal, and the output end of each comparator outputs a signal representing the shielding state of the corresponding infrared geminate transistor.
An infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the input end of the covering detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the covering detection circuit outputs a signal representing the shielding state of the infrared receiving tube.
The beneficial effects of the utility model reside in that: the utility model provides an infrared touch screen and cover detection device thereof can acquire the state data of touch-sensitive screen to it is controlled to the follow-up.
Drawings
Fig. 1 is a schematic diagram of the infrared touch screen covering detection device in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a signal strength detection circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a coverage detection circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the infrared touch screen covering detection device in an embodiment of the present invention.
Fig. 5 is a schematic diagram of the circuit for acquiring a boundary of a shielding object according to an embodiment of the present invention.
Fig. 6 is a schematic view of the infrared touch screen being shielded by the shielding object in an embodiment of the present invention.
Fig. 7 is a schematic view of an embodiment of the present invention, in which the infrared receiving tube receives a signal with increased intensity in a shielded state.
Fig. 8 is a schematic diagram of the composition of the infrared touch screen in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For further understanding of the present invention, preferred embodiments of the present invention will be described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the present invention.
The description in this section is for exemplary embodiments only, and the present invention is not limited to the scope of the embodiments described. The same or similar prior art means and some technical features of the embodiments are mutually replaced and are also within the scope of the description and the protection of the invention.
The utility model discloses an infrared touch screen coverage detection device, and FIG. 1 is a schematic diagram of the infrared touch screen coverage detection device in an embodiment of the utility model; referring to fig. 1, the infrared touch screen coverage detection apparatus includes: a plurality of signal strength detection circuits 1 and a coverage detection circuit 3. The infrared touch screen comprises a plurality of infrared geminate transistors, and each infrared geminate transistor comprises an infrared transmitting tube 7 and an infrared receiving tube 9; in an embodiment of the present invention, the connecting lines of the infrared transmitting tube 7 and the infrared receiving tube 9 in each infrared pair tube are parallel to each other.
Each signal intensity detection circuit 1 is connected to a corresponding infrared receiving tube 9, and is used for detecting the signal intensity received by each infrared receiving tube 9. The input end of the coverage detection circuit 3 is respectively connected with the signal intensity detection circuits 1, and the output end of the coverage detection circuit 3 outputs a signal representing the shielding state of the infrared receiving tube.
In a usage scenario of the present invention, the coverage detection circuit 3 is used to determine whether the corresponding infrared pair transistor is blocked according to the signal strength detected by each signal strength detection circuit 1; if the signal intensity detected by the infrared receiving tube 9 is smaller than a set first threshold value, judging that the corresponding infrared geminate transistor is not shielded; if the signal intensity detected by the infrared receiving tube 9 is greater than the set second threshold, it is determined that the corresponding infrared pair tube is blocked.
Fig. 2 is a schematic diagram illustrating a signal strength detection circuit according to an embodiment of the present invention; referring to fig. 2, in an embodiment, the signal strength detecting circuit 1 includes a sampling circuit 101, an analog-to-digital converting circuit 102, and a signal strength converting circuit 103; the sampling circuit 101 is used for collecting analog signals received by the infrared receiving tube 9; the analog-to-digital conversion circuit 102 is configured to convert an analog signal acquired by the sampling circuit 101 into a digital signal; the signal strength conversion circuit 103 is configured to convert the digital signal into a value capable of representing the signal strength, and the value is used for comparison by the coverage detection circuit 3. In an embodiment, the sampling circuit 101 may be part of the infrared receiving tube 9.
In an embodiment of the utility model, every to the infrared receiving tube 9 received signal of infrared geminate transistor, the analog signal that the infrared receiving tube was received is gathered to sampling circuit 101, and analog-to-digital conversion circuit 102 is used for converting the analog signal that sampling circuit gathered into digital signal, and signal strength converting circuit 103 will digital signal converts into a numerical value (0 ~ 255) that can characterize signal strength, and then covers detection circuitry 3 and judges according to this 0 ~ 255 digital size. For example: the value of the number in the normal state is 100, and the value of the number in the covering state can reach 200, so that whether the infrared receiving tube in the corresponding area is shielded or not can be judged.
Fig. 3 is a schematic diagram illustrating a composition of a coverage detection circuit according to an embodiment of the present invention; referring to fig. 3, in an embodiment of the present invention, the input end of the coverage detection circuit 3 is connected to each signal strength detection circuit 1, and the output end of the coverage detection circuit 3 outputs a signal representing the shielding state of the infrared receiving tube. In an embodiment, the coverage detection circuit 3 includes a plurality of first comparators 301, a non-inverting input terminal of each first comparator 301 is connected to the corresponding signal strength detection circuit 1 (specifically, the corresponding signal strength conversion circuit 103), an inverting input terminal of each first comparator 301 is connected to the set reference signal, and an output terminal of each first comparator 301 outputs a signal representing the shielding state of the corresponding infrared pair transistor.
Fig. 4 is a schematic diagram illustrating the components of the infrared touch screen coverage detection device according to an embodiment of the present invention; referring to fig. 4, in an embodiment of the present invention, the detecting system further includes a shielding boundary line obtaining circuit 4 for determining the shielding boundary line according to the signal intensity detected by each signal intensity detecting circuit 1, and if the signal intensity difference detected by the adjacent infrared receiving tubes 9 is greater than a set threshold, determining that the shielding boundary line is located in the region corresponding to the adjacent infrared receiving tube.
Fig. 5 is a schematic diagram of the circuit for acquiring a boundary of a shielding object according to an embodiment of the present invention; referring to fig. 5, in an embodiment, the shelter boundary line obtaining circuit 4 includes a plurality of second comparators 401, wherein a positive phase input terminal and a negative phase input terminal of each second comparator 401 are respectively connected to output terminals of two first comparators 301 connected to adjacent infrared receiving tubes 9, and an output terminal of the second comparator 401 outputs a signal indicating whether the sheltered states of the two adjacent infrared receiving tubes 9 are the same.
The utility model discloses an in the embodiment, detecting system still includes shelter from thing motion judgement unit 5 for signal strength change law that detects according to each signal strength detection circuit judges shelter from thing direction of motion. If the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, the shelter motion judgment unit 5 judges that the infrared touch screen is gradually sheltered towards the set first direction; if the signal intensity detection circuits detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially weakened along the set second direction, the shelter motion judgment unit 5 judges that the infrared touch screen gradually expands towards the set second direction to release the shelter.
Fig. 6 is a schematic view illustrating the infrared touch screen being shielded by a shielding object according to an embodiment of the present invention; referring to fig. 6, in an embodiment of the present invention, the infrared touch screen further includes an infrared screen 11 and a cover 13, each infrared pair tube is disposed on the infrared screen 11, and the infrared screen 11 can be retracted into the cover 13. In an embodiment, if the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes 9 in the set range is sequentially increased along the set first direction, the shelter motion determination unit 5 determines that the infrared screen is retracted into the shelter; if the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes 9 in the set range is sequentially reduced along the set second direction, the shelter motion judgment unit 5 judges that the infrared screen is gradually pulled away from the shelter.
Fig. 7 is a schematic view illustrating the principle that the intensity of the received signal of the infrared receiving tube in the shielded state is increased according to an embodiment of the present invention; referring to fig. 7, when the infrared pair of tubes of the infrared screen 11 is shielded by the shielding object 13, the corresponding infrared receiving tube 9 can receive the light directly emitted from the infrared emitting tube 7, and can receive the light reflected from the shielding object 13, so that the received signal is stronger. In an embodiment of the present invention, the first threshold and the second threshold are adjusted according to the flatness of the shielding object 13, so that the detection is more accurate.
The utility model discloses infrared touch-sensitive screen covers detection device's detection principle as follows:
1. each signal intensity detection circuit 1 is connected to a corresponding infrared receiving tube 9, and detects the signal intensity received by each infrared receiving tube 9.
2. And the coverage detection circuit judges whether the corresponding infrared geminate transistor is shielded or not according to the signal intensity detected by each signal intensity detection circuit 1. The method specifically comprises the following steps: if the signal intensity detected by the infrared receiving tube 9 is smaller than a set first threshold value, judging that the corresponding infrared geminate transistor is not shielded; if the signal intensity detected by the infrared receiving tube 9 is greater than the set second threshold, it is determined that the corresponding infrared pair tube is blocked.
3. The barrier boundary line acquiring circuit judges the barrier boundary line according to the signal intensity detected by each signal intensity detecting circuit 1. The method specifically comprises the following steps: if the difference of the signal intensity detected by the adjacent infrared receiving tubes 9 is larger than the set threshold value, the boundary line of the shelter is judged to be positioned in the area corresponding to the adjacent infrared receiving tubes.
4. The shelter movement judgment unit 5 judges the movement direction of the shelter according to the signal intensity change rule detected by each signal intensity detection circuit. The method specifically comprises the following steps: if the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially enhanced along the set first direction, the shelter motion judgment unit 5 judges that the infrared touch screen is gradually sheltered towards the set first direction; if the signal intensity detection circuits detect that the signal intensity received by the infrared receiving tubes in the set range is sequentially weakened along the set second direction, the shelter motion judgment unit 5 judges that the infrared touch screen gradually expands towards the set second direction to release the shelter. In an embodiment, if the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes 9 in the set range is sequentially increased along the set first direction, the shelter motion determination unit 5 determines that the infrared screen is retracted into the shelter; if the signal intensity detection circuits 1 detect that the signal intensity received by the infrared receiving tubes 9 in the set range is sequentially reduced along the set second direction, the shelter motion judgment unit 5 judges that the infrared screen is gradually pulled away from the shelter.
The utility model discloses an infrared touch screen, and FIG. 8 is a schematic diagram of a part of the infrared touch screen in an embodiment of the present invention; referring to fig. 8, in an embodiment of the present invention, the infrared touch screen includes a touch screen body 10 and an infrared touch screen coverage detection device 20; the infrared touch screen covering detection device 20 is connected to the touch screen body 10 and used for acquiring the state whether the touch screen body 10 is shielded or not.
In an embodiment of the present invention, the infrared touch screen covering detection device 20 adopts the above-mentioned infrared touch screen covering detection device.
To sum up, the utility model provides an infrared touch-sensitive screen and cover detection device thereof can acquire the state data of touch-sensitive screen to it is controlled to follow-up.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the present invention are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the present invention.
Claims (9)
1. An infrared touch screen is characterized by comprising a touch screen body and an infrared touch screen covering detection device;
the touch screen body comprises a plurality of infrared geminate transistors, and each infrared geminate transistor comprises an infrared transmitting tube and an infrared receiving tube;
the infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity;
the input end of the coverage detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the coverage detection circuit outputs a signal representing the shielding state of the infrared receiving tube;
the coverage detection circuit comprises a plurality of comparators, wherein the positive phase input end of each comparator is connected with the corresponding signal intensity detection circuit, the negative phase input end of each comparator is connected with a set reference signal, and the output end of each comparator outputs a signal representing the shielding state of the corresponding infrared geminate transistor.
2. An infrared touch screen is characterized by comprising a touch screen body and an infrared touch screen covering detection device;
the touch screen body comprises a plurality of infrared geminate transistors, and each infrared geminate transistor comprises an infrared transmitting tube and an infrared receiving tube;
the infrared touch screen coverage detection device comprises a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the input end of the covering detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the covering detection circuit outputs a signal representing the shielding state of the infrared receiving tube.
3. The infrared touch screen of claim 2, wherein:
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal strength conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal strength.
4. The infrared touch screen of claim 2, wherein:
the coverage detection circuit comprises a plurality of first comparators, the positive phase input end of each first comparator is connected with the corresponding signal intensity detection circuit, the negative phase input end of each first comparator is connected with a set reference signal, and the output end of each first comparator outputs a signal representing the shielding state of the corresponding infrared geminate transistor.
5. The infrared touch screen of claim 2, wherein:
the infrared touch screen coverage detection device further comprises a shielding object boundary acquisition circuit used for judging the shielding object boundary according to the signal intensity detected by each signal intensity detection circuit.
6. The infrared touch screen of claim 4, wherein:
the infrared touch screen coverage detection device further comprises a shielding object boundary acquisition circuit used for judging the shielding object boundary according to the signal intensity detected by each signal intensity detection circuit;
the shelter boundary line acquisition circuit comprises a plurality of second comparators, wherein the positive phase input end and the negative phase input end of each second comparator are respectively connected with the output ends of two first comparators used for detecting and connecting adjacent infrared receiving tubes, and the output ends of the second comparators output signals representing whether the sheltered states of the two adjacent infrared receiving tubes are the same or not.
7. The infrared touch screen of claim 2, wherein:
the infrared touch screen further comprises a covering device, and each infrared geminate transistor is arranged in the touch screen body, and the touch screen body can be retracted into the covering device.
8. The device for detecting the coverage of the infrared touch screen is characterized by comprising a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the signal intensity detection circuit comprises a sampling circuit, an analog-to-digital conversion circuit and a signal intensity conversion circuit; the sampling circuit is used for collecting analog signals received by the infrared receiving tube; the analog-to-digital conversion circuit is used for converting the analog signals acquired by the sampling circuit into digital signals; the signal intensity conversion circuit is used for converting the digital signal into a numerical value capable of representing the signal intensity;
the input end of the coverage detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the coverage detection circuit outputs a signal representing the shielding state of the infrared receiving tube;
the coverage detection circuit comprises a plurality of comparators, wherein the positive phase input end of each comparator is connected with the corresponding signal intensity detection circuit, the negative phase input end of each comparator is connected with a set reference signal, and the output end of each comparator outputs a signal representing the shielding state of the corresponding infrared geminate transistor.
9. The device for detecting the coverage of the infrared touch screen is characterized by comprising a plurality of signal intensity detection circuits and a coverage detection circuit;
each signal intensity detection circuit is respectively connected with the corresponding infrared receiving tube and is used for detecting the signal intensity received by each infrared receiving tube;
the input end of the covering detection circuit is respectively connected with each signal intensity detection circuit, and the output end of the covering detection circuit outputs a signal representing the shielding state of the infrared receiving tube.
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| CN201922151214.XU CN211742090U (en) | 2019-12-04 | 2019-12-04 | Infrared touch screen and coverage detection device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674582A (en) * | 2020-12-24 | 2022-06-28 | 沈阳新松机器人自动化股份有限公司 | Dry-type cleaning machines people coverage testing arrangement |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674582A (en) * | 2020-12-24 | 2022-06-28 | 沈阳新松机器人自动化股份有限公司 | Dry-type cleaning machines people coverage testing arrangement |
| CN114674582B (en) * | 2020-12-24 | 2024-03-22 | 沈阳新松机器人自动化股份有限公司 | Coverage rate testing device for dry cleaning robot |
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