CN111541441B - A non-contact key device and working method thereof - Google Patents
A non-contact key device and working method thereof Download PDFInfo
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- CN111541441B CN111541441B CN202010332651.6A CN202010332651A CN111541441B CN 111541441 B CN111541441 B CN 111541441B CN 202010332651 A CN202010332651 A CN 202010332651A CN 111541441 B CN111541441 B CN 111541441B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/95—Proximity switches using a magnetic detector
- H03K17/9505—Constructional details
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/95—Proximity switches using a magnetic detector
- H03K17/9517—Proximity switches using a magnetic detector using galvanomagnetic devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K17/955—Proximity switches using a capacitive detector
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
- H03K2017/9455—Proximity switches constructional details
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Abstract
The invention discloses a non-contact key device and a working method thereof. The non-contact key device comprises a key action detection module, a control module, a key panel module, an execution module and a touch sense generation module. When the user operates the non-contact key, the invention gives the air flow feedback similar to the touch feeling of using the physical key to the finger of the user, so that the user feels that the key is pressed, and the invention accords with the characteristics of human engineering.
Description
Technical Field
The invention relates to the technical field of electrical control, in particular to a non-contact key device and a working method thereof.
Background
The non-contact key has a trend of replacing an entity key in various occasions due to the characteristics of easy operation and safety and sanitation, such as an infrared switch of a miniaturized infrared switch module of Chinese patent CN210201806U, an elevator key of a non-touch intelligent elevator key of Chinese patent CN109319612A, and the like. In the prior art, although various non-contact sensors can detect the pressing action of the user, the touch feeling given by the physical key is not given to the user, but the touch feeling is not given, so that the user cannot directly feel whether the key is pressed or not, and can only wait for signals such as sound, light or action of an executing mechanism, for example, the infrared switch-on/off circuit with state feedback in the Chinese patent CN110176921a only gives feedback of an indicator lamp. The user may have directly pressed the key entity in the waiting process, so that the meaning of non-contact key "non-contact" is lost, and the purpose of avoiding cross contamination cannot be achieved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a non-contact key device and a working method thereof, and when a user uses a non-contact key, feedback similar to touch sense is given to the user by using a physical key so as to accord with the use habit of the user.
The technical scheme of the invention is as follows:
The invention provides a non-contact key device which comprises a key action detection module, a control module, a key panel module, an execution module and a touch sense generation module, wherein the key action detection module is connected with the control module and used as input of the control module, the key panel module is connected with the control module and used as output of the control module, the control module is a control center of the device, the touch sense generation module is connected with the control module and used as output of the control module, and the execution module is connected with the control module and used as output of the control module.
The key action detection module is used for detecting key actions of a user and comprises a sensor unit, a signal processing circuit unit and a sensor driving circuit unit. The sensor unit comprises an infrared pair tube consisting of an infrared transmitting tube and an infrared receiving tube, and is arranged on the sensor bracket. When the user has the button action, the infrared signal emitted by the infrared emission tube is blocked, and the infrared signal is not received by the infrared receiving tube. In this way, the infrared pair of tubes converts the key actions of the user into electric signals, and the electric signals are amplified and processed by the signal processing circuit unit and then sent to the control module.
Preferably, the sensor unit may further comprise a pair of infrared pair tubes consisting of a first infrared transmitting tube and a first infrared receiving tube and a pair of infrared pair tubes consisting of a second infrared transmitting tube and a second infrared receiving tube, and the sensor unit is mounted on the sensor bracket, wherein the infrared pair tubes consisting of the first infrared transmitting tube and the first infrared receiving tube are located above the infrared pair tubes consisting of the second infrared transmitting tube and the second infrared receiving tube. The infrared pair tube formed by the first infrared transmitting tube and the first infrared receiving tube is used for detecting a pressing or approaching signal of a finger of a user, namely a pressing stroke starting line, and the infrared pair tube formed by the second infrared transmitting tube and the second infrared receiving tube is used for detecting whether the pressing stroke of the finger of the user reaches a lower limit, namely a pressing stroke ending line. The space between the pressing stroke start line and the pressing stroke end line constitutes a detection area for finger motion.
The sensor unit may be a proximity sensor such as a photoelectric sensor, a capacitive sensor, a hall sensor, an ultrasonic sensor, or a microwave sensor, or may be a sensor capable of detecting a key operation such as a distance sensor, a pyroelectric sensor, or a thermopile sensor.
The control module is used for receiving the input information of the key action detection module, starting or closing the touch sense generation module, instructing the key panel module to display the key information of the user, communicating with the upper computer, and instructing the execution module to complete the appointed action.
The control module comprises an interface unit, a control unit, a storage unit, a communication unit and a driving unit.
The interface unit is connected with the control unit and used for receiving the input information of the key action detection module as the input of the control unit;
The storage unit is connected with the control unit and is used for storing data for the control unit;
the communication unit is connected with the control unit and receives the instruction of the control unit to realize the communication with the upper computer;
the driving unit is connected with the control unit, and is used as the output of the control unit to start or close the touch sensing generation module, instruct the key panel module to display the key information of the user and instruct the execution module to complete the appointed action;
the control unit is a control center of the control module.
The key panel module is used for indicating key functions and key positions, displaying key related information, giving a sound or light prompt to a user when effective key actions of the user are detected, and feeding back the sound or light prompt to the user to succeed in key pressing. The key panel module comprises a key identification unit and an information prompt unit.
The key identification unit is arranged on the key and used for identifying the name or the function of the key.
The information prompt unit is arranged around the keys and connected with the control module to receive and display user prompt information.
One or more air holes are formed in the key identification unit and serve as air outlets of the touch sensing generation module.
The execution module receives the instruction of the control module to execute specified actions, such as lighting or turning off a lamp, driving a motor and the like.
The touch sense generation module is used for receiving the signal of the control module so as to open or close the air path of the compressed air, and the air flow is sprayed out from the air hole of the key identification unit to give the user a touch sense similar to that when the physical key is pressed.
The touch sensing generation module comprises an electric air pump, an electric air pump driving circuit, an air pipe and a nozzle.
The electric air pump is electrically connected with the electric air pump driving circuit, and compressed air is generated under the driving of the electric air pump driving circuit to provide an air source for the touch sense generating module.
And the electric air pump driving circuit starts or closes the electric air pump according to the received signal of the control module and controls the air flow and the pressure of the air outlet of the electric air pump so as to control whether the nozzle ejects compressed air and the pressure of the ejected compressed air.
The air inlet of the electric air pump is communicated with the atmosphere, the air outlet is connected with the nozzle through an air pipe.
The nozzle is installed on the button identification unit, and the nozzle opening is located the gas pocket department on the button identification unit.
The touch feeling generating module can also comprise an external compressed air source, an electromagnetic valve driving circuit, an air pipe and a nozzle.
An external compressed air source provides compressed air to provide a source of air for the tactile sensation generating module.
One end of the electromagnetic valve is connected with an external compressed air source through an air pipe, and the other end of the electromagnetic valve is connected with the nozzle through an air pipe and is electrically connected with an electromagnetic valve driving circuit.
The nozzle is installed on the button identification unit, and the nozzle opening is located the gas pocket department on the button identification unit.
And the electromagnetic valve driving circuit receives the control signal of the control module and opens and closes the electromagnetic valve, so as to control the opening and closing of the compressed air passage and control whether the nozzle ejects compressed air.
Preferably, the electromagnetic valve is a proportional electromagnetic valve, and the opening and closing degree of the electromagnetic valve can be controlled according to the received signal of the control module, so that the size of the compressed air flow and the pressure sprayed by the nozzle can be controlled.
The invention provides a working method of a non-contact key device, which comprises the following steps:
s1, detecting a finger pressing action;
the key action detection module periodically detects whether a user finger presses or approaches, and once the user finger presses or approaches is detected, a signal is sent to the control module.
S2, driving the touch sense generating module to jet out air flow;
The control module immediately drives the touch sensing module to open the electromagnetic valve after receiving the information of the pressing or approaching action of the user finger reported by the key action detection module, compressed air is sprayed out of the opening position of the nozzle on the key identification unit, the user finger can feel the blowing of air flow to form a feeling similar to the touch sensing, and the user can know that the key is pressed without continuing the pressing stroke.
S3, judging effective pressing action;
The key action detection module detects that the finger of the user presses or approaches the signal for the duration T, the control module confirms that the signal is effectively pressed, the control module instructs the key panel module to prompt the user with sound, light and the like, and the user is informed of successful key pressing, so that the user can withdraw the finger action.
The time T is determined according to the detection mode.
It should be noted that the tactile sensation generating module continuously emits the air flow before the user withdraws the finger to maintain the feeling of the tactile sensation to the user.
S4, driving the execution module or reporting to the host computer.
After confirming the effective pressing signal, the control module transmits the effective pressing signal to an upper computer or directly instructs the execution module to execute the appointed action according to the application scene.
Further, if the button action detection module detects that the user still continues to press the stroke after the air flow is sprayed from the nozzle, the control module drives the touch sensing generation module to provide air flow with higher pressure from the nozzle so as to further remind the user that the button is pressed without continuing to press the stroke.
The technology has the beneficial effects that when a user operates the non-contact key, the airflow feedback similar to the touch feeling of using the physical key is given to the finger of the user, so that the user feels that the key is pressed, and the technology accords with the characteristics of ergonomics. And when the finger stroke of the user is too large, the air flow with stronger pressure is given to the user, so that the user is prevented from expanding the stroke, the key mark of the entity is prevented from being contacted, the non-contact is truly realized, and the cross contamination of the entity keys is prevented.
Drawings
FIG. 1 is a schematic block diagram of a non-contact key device according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of the principle and structure of another embodiment of a non-contact key device provided by the present invention;
FIG. 3 is a side view of a non-contact key device according to an embodiment of the present invention;
FIG. 4 is a top view of an embodiment of a non-contact key device according to the present invention;
Fig. 5 is a flowchart of an embodiment of a working method of a non-contact key device provided by the present invention.
In the figure:
1-a key action detection module;
a 12-signal processing circuit unit, a 13-sensor driving circuit unit;
111-a first infrared transmitting tube, 112-a second infrared transmitting tube, 113-a sensor bracket, 114-a first infrared receiving tube, 115-a second infrared receiving tube;
2-a control module;
21-interface unit, 22-memory unit, 23-control unit, 24-communication unit, 25-drive unit;
3-a key panel module;
the device comprises a 31-key identification unit, a 32-information prompt unit;
4-an execution module;
a 5-tactile sensation generation module;
51-an electric air pump, 52-an air pipe, 53-an electromagnetic valve, 54-a nozzle, 55-an electromagnetic valve driving circuit, 56-an electric air pump driving circuit and 311-an air hole.
Detailed Description
The technical scheme of the present application will be clearly and completely described in the following with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the non-contact key device provided by the invention comprises a key motion detection module 1, a control module 2, a key panel module 3, an execution module 4 and a touch sense generation module 5, wherein the key motion detection module 1 is connected with the control module 2 and is used as an input of the control module 2, the key panel module 3 is connected with the control module 2 and is used as an output of the control module 2, the control module 2 is a control center of the device, the touch sense generation module 5 is connected with the control module 2 and is used as an output of the control module 2, and the execution module 4 is connected with the control module 2 and is used as an output of the control module 2.
The key action detection module 1 is configured to detect a key action of a user, and includes a sensor unit 11, a signal processing circuit unit 12, and a sensor driving circuit unit 13. The sensor unit 11 includes a pair of infrared pair tubes composed of a first infrared transmitting tube 111 and a first infrared receiving tube 114 and a pair of infrared pair tubes composed of a second infrared transmitting tube 112 and a second infrared receiving tube 115, and is mounted on the sensor bracket 113, wherein the infrared pair tubes composed of the first infrared transmitting tube 111 and the first infrared receiving tube 114 are above the infrared pair tubes composed of the second infrared transmitting tube 112 and the second infrared receiving tube 115. The sensor driving circuit unit 13 drives the first infrared transmitting tube 111 and the second infrared transmitting tube 112 to transmit infrared signals, when the user does not have a key action, the first infrared receiving tube 114 receives the infrared signals transmitted by the first infrared transmitting tube 111, and the second infrared receiving tube 115 receives the infrared signals transmitted by the second infrared transmitting tube 112. When the user has a key, the finger shields the infrared signal emitted by the first infrared emitting tube 111 or the second infrared emitting tube 112, and the first infrared receiving tube 114 or the second infrared receiving tube 115 does not receive the infrared signal. In this way, the infrared pair of tubes converts the user key action into an electrical signal, and the electrical signal is amplified and processed by the signal processing circuit unit 12 and then sent to the control module 2.
Further, the infrared pair tube composed of the first infrared transmitting tube 111 and the first infrared receiving tube 114 is used for detecting the pressing or approaching signal of the finger of the user, namely, the pressing stroke starting line, and the infrared pair tube composed of the second infrared transmitting tube 112 and the second infrared receiving tube 115 is used for detecting whether the pressing stroke of the finger of the user reaches the lower limit, namely, the pressing stroke ending line. The space between the pressing stroke start line and the pressing stroke end line constitutes a detection area for finger motion.
The control module 2 is configured to receive input information from the keystroke detection module 1, start or close the touch sensing generation module 5, instruct the keystroke panel module 3 to feed back keystroke information to a user, communicate with an upper computer, and instruct the execution module 4 to complete a specified action. The control module 2 comprises an interface unit 21, a storage unit 22, a control unit 23, a communication unit 24 and a driving unit 25.
The interface unit 21 is connected with the control unit 23, and is used as an input of the control unit 23 and for receiving the input information of the key action detection module 1;
the storage unit 22 is connected with the control unit 23 and stores data for the control unit 23;
The communication unit 24 is connected with the control unit 23, receives the instruction of the control unit 23, and realizes the communication with the upper computer;
The driving unit 25 is connected with the control unit 23, and as the output of the control unit 23, starts or closes the touch sensing generation module 5, instructs the key panel module 3 to display the key information of the user, and instructs the execution module 4 to complete the specified action;
The control unit 23 is a control center of the control module 2.
The key panel module 3 is configured to instruct key functions and key positions, display key related information, and give a prompt to the user of sound or light when detecting an effective key action of the user, and feed back the prompt to the user that the key is successful. The key panel module 3 includes a key identification unit 31 and an information prompt unit 32.
A key identification unit 31 is mounted on the keys for identifying the names or functions of the keys.
The information prompt unit 32 is installed around the keys, connected to the control module 2, and receives and displays user prompt information.
The key identification unit 31 is provided with an air hole 311 as an air outlet of the compressed air of the touch sensing generation module 5.
The key identification unit 31 is lower than the mounting height of the second infrared transmitting tube 112 and the second infrared receiving tube 115.
The execution module 4 receives the instruction of the control module 2 to execute a specified action, such as lighting or turning off a lamp, driving a motor, and the like.
The touch feeling generating module 5 is configured to receive the signal from the control module 2, thereby opening or closing the air path of the compressed air, and the air flow is ejected from the air hole 311 of the key identification unit 31, so as to give the user a touch feeling similar to that when the physical key is pressed.
As shown in fig. 1, the tactile sensation generating module 5 includes an electric air pump 51, an air pipe 52, an electric air pump driving circuit 56, and a nozzle 54.
The electric air pump 51 is electrically connected with the electric air pump driving circuit 56, and generates compressed air under the driving of the electric air pump driving circuit 56 to provide an air source for the touch feeling generating module 5.
The electric air pump driving circuit 56 starts or shuts off the electric air pump 51 according to the received signal of the control module 2, and controls the air flow and pressure of the air outlet of the electric air pump 51, thereby controlling whether the nozzle 54 ejects the compressed air, and the pressure of the ejected compressed air.
The air inlet of the electric air pump 51 is communicated with the atmosphere, and the air outlet is connected with the nozzle 54 through an air pipe 52.
The nozzle 54 is mounted on the key identification unit 31, and the nozzle 54 is opened at the air hole 311 on the key identification unit 31.
As shown in fig. 2, the tactile sensation generating module 5 includes an external compressed air source, a solenoid valve 53, a solenoid valve driving circuit 55, an air pipe 52, and a nozzle 54.
An external compressed air source provides compressed air to provide a source of air for the tactile sensation generating module 5. One end of the solenoid valve 53 is connected to an external compressed air source through the air pipe 52, and the other end is connected to the nozzle 54 through the air pipe 52 and is electrically connected to the solenoid valve driving circuit 55.
The nozzle 54 is mounted on the key identification unit 31, and the nozzle 54 is opened at the air hole 311 on the key identification unit 31.
Preferably, the solenoid valve 53 is a proportional pressure solenoid valve or a proportional flow solenoid valve, and can control the opening and closing of the compressed air passage, and can also control the pressure and flow rate of the compressed air ejected from the nozzle 54.
As shown in fig. 5, the working method of the non-contact key device provided by the invention comprises the following working procedures:
s1, detecting a finger pressing action;
the key motion detection module 1 periodically detects whether there is a pressing motion or a proximity motion of the finger of the user, and when the infrared rays emitted by the first infrared emission tube 111 are blocked by the finger of the user, the first infrared receiving tube 114 cannot detect the infrared rays emitted by the first infrared emission tube 111, and the key motion detection module 1 sends a signal to the control module 2.
In this embodiment, the infrared wavelength is 940nm or 850nm.
S2, driving the touch sense generating module 5 to jet out air flow;
After receiving the information of the pressing or approaching action of the user's finger reported by the key action detection module 1, the control module 2 immediately drives the touch sensing module 5, opens the electromagnetic valve 53, ejects compressed air from the nozzle 54 at the air hole 311 on the key identification unit 31, and the user's finger senses the blowing of the air flow to form a feeling similar to the touch sensing, so that the user knows that the key has been pressed without continuing the pressing stroke.
S3, judging effective pressing action;
The key action detection module 1 detects that the finger of the user presses or approaches the signal for the duration T, the control module 2 confirms that the signal is effectively pressed, the control module 2 instructs the key panel module 3 to give the user a prompt such as sound and light, and the like, so that the user is informed of successful key pressing, and the user can withdraw the finger action.
The length of the time T is determined according to the detection mode, and is determined to be 100-200 ms in this embodiment, and the time begins when the first infrared receiving tube 114 cannot detect the infrared signal emitted by the first infrared emitting tube 111.
The tactile sensation generating module 5 continuously emits the air flow to maintain the feeling of the tactile sensation to the user until the user withdraws the finger.
And S4, driving the execution module 4 or reporting to a host computer.
After confirming the effective pressing signal, the control module 2 transmits the effective pressing signal to the upper computer through the communication unit 24 or directly instructs the execution module 4 to execute the specified action according to the application scenario.
Further, if the infrared light emitted by the second infrared emitting tube 112 is blocked by the finger of the user, and the second infrared receiving tube 115 cannot receive the infrared light signal emitted by the second infrared emitting tube 112, and the user presses the stroke to reach the stroke end line, the control module 2 drives the touch sensing module 5 to provide an air flow with a higher pressure from the nozzle 54, so as to further remind the user that the user has pressed the key, without continuing to press the stroke.
The non-contact key device provided by the invention has the advantages that when a user operates the non-contact key, the airflow feedback similar to the touch feeling of using the physical key is given to the finger of the user, so that the user feels that the key is pressed, and the non-contact key device accords with the characteristics of ergonomics. And when the finger stroke of the user is too large, the air flow with stronger pressure is given to the user, so that the user is prevented from expanding the stroke and the key mark of the entity is prevented from being contacted, thereby truly realizing 'non-contact' and preventing the cross contamination of the entity key.
The above embodiments have been described in connection with the accompanying drawings, but are not to be construed as limiting the scope of the invention, and it should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010332651.6A CN111541441B (en) | 2020-04-24 | 2020-04-24 | A non-contact key device and working method thereof |
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| CN202010332651.6A CN111541441B (en) | 2020-04-24 | 2020-04-24 | A non-contact key device and working method thereof |
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| CN111541441B true CN111541441B (en) | 2025-03-21 |
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| CN113098475B (en) * | 2021-04-01 | 2024-03-01 | 安徽新华学院 | Combined simplified structure air key based on infrared light scanning and implementation method thereof |
| CN114104889A (en) * | 2021-10-29 | 2022-03-01 | 林子钧 | Elevator button epidemic prevention auxiliary panel |
| CN114269088B (en) * | 2021-12-24 | 2022-10-28 | 深圳市金麦特电源科技有限公司 | Control system of lithium ion battery power supply |
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| DE102008008366A1 (en) * | 2008-02-09 | 2009-09-10 | ASTRA Gesellschaft für Asset Management mbH & Co. KG | A method for generating an information signal in an access request and apparatus for carrying out the method |
| WO2011093873A1 (en) * | 2010-01-29 | 2011-08-04 | Hewlett-Packard Development Company, L.P. | Tactile display using distributed fluid ejection |
| US9600076B2 (en) * | 2014-12-19 | 2017-03-21 | Immersion Corporation | Systems and methods for object manipulation with haptic feedback |
| CN109669516B (en) * | 2018-12-25 | 2023-04-18 | 三星电子（中国）研发中心 | Flexible screen, interaction method and device based on flexible screen |
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