CN110333435B - Touch identification detection circuit and wearable equipment - Google Patents
Touch identification detection circuit and wearable equipment Download PDFInfo
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- CN110333435B CN110333435B CN201910441257.3A CN201910441257A CN110333435B CN 110333435 B CN110333435 B CN 110333435B CN 201910441257 A CN201910441257 A CN 201910441257A CN 110333435 B CN110333435 B CN 110333435B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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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
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
Abstract
The application relates to a touch identification detection circuit and wearable equipment, wherein, touch identification detection circuit includes: detecting a power supply; a detection circuit; the input end of the gain amplification circuit is connected in parallel with the two ends of the shunt resistor, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor and outputting the amplified voltage signal as a detection signal; the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal; the signal conversion circuit is used for converting the detected detection signal into a corresponding touch signal; and the controller is connected with the signal conversion circuit and is used for identifying corresponding touch operation according to the touch signal. The embodiment provided by the application increases the interactive area of the wearable device, so that the interactive operation of the user and the wearable device is more convenient, meanwhile, the structure design is simple, the performance is reliable, the sensitivity is higher, and the user operation experience can be effectively improved.
Description
Technical Field
The application relates to the field of movable terminals, in particular to a touch identification detection circuit and wearable equipment.
Background
The intelligent product of arm wearing class that exists in the market at present, like wrist machine, bracelet, wrist-watch, when the user carries out the interactive operation to intelligent product, often need operate the screen or the button of intelligent product. The existing interaction process has the following disadvantages:
first, the screen area of the arm-worn smart product is small, so the area where touch operations can be performed is also small, resulting in inconvenience in interactive operations.
Secondly, the watch body (such as a dial) of the arm-worn intelligent product is small in size, so that the size of the key is small.
Therefore, a touch identification detection circuit and a wearable device are needed to solve the problem that the interactive operation of arm wearing type intelligent products is inconvenient.
Disclosure of Invention
To solve the technical problem or at least partially solve the technical problem, the present application provides a touch recognition detection circuit and a wearable device.
In a first aspect, the present application provides a touch recognition detection circuit for a wearable device, the wearable device includes a watchband, the watchband includes a plurality of chain links that end to end in proper order, its characterized in that, the touch recognition detection circuit includes: detecting a power supply;
the detection circuit is arranged on the chain link and comprises a first contact, a second contact and a shunt resistor, the first contact is connected with the detection power supply, the second contact is connected with one end of the shunt resistor, and the other end of the shunt resistor is grounded;
the input end of the gain amplification circuit is connected in parallel with the two ends of the shunt resistor, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor and outputting the amplified voltage signal as a detection signal;
the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal;
the input end of the signal conversion circuit is connected with the output end of the detection circuit, the output end of the signal conversion circuit is connected with the controller, and the signal conversion circuit is used for converting the detected detection signal into a corresponding touch signal;
the controller is connected with the signal conversion circuit and used for identifying corresponding touch operation according to the touch signal.
Optionally, the gain amplifying circuit includes:
the output end of the operational amplifier is connected with the signal conversion circuit;
one end of the first resistive element is connected with one end of the shunt resistor, and the other end of the first resistive element is connected with the anode of the input end of the operational amplifier;
and one end of the second resistive element is connected with the other end of the shunt resistor, and the other end of the second resistive element is connected with the negative electrode of the input end of the operational amplifier.
Optionally, the gain amplifying circuit further includes:
and one end of the third resistive element is connected with the other end of the second resistive element, and the other end of the third resistive element is connected with the output end of the amplifier.
Optionally, the detection circuit includes:
one end of the unidirectional conducting element is connected with the output end of the gain amplifying circuit, and the conducting direction of the unidirectional conducting element is opposite to the output direction of the gain amplifying circuit;
and one end of the fourth resistive element is connected with the other end of the one-way conduction element, and the other end of the fourth resistive element is connected with the signal conversion circuit.
Optionally, the detection circuit further includes:
one end of the capacitive element is connected with the other end of the fourth resistive element, and the other end of the capacitive element is grounded;
and one end of the fifth resistive element is connected with the other end of the fourth resistive element, and the other end of the fifth resistive element is grounded.
Optionally, the signal conversion circuit includes:
a power supply source;
the grid electrode of the field-effect tube is connected with the output end of the detection circuit, the drain electrode of the field-effect tube is connected with the power supply and the controller, and the source electrode of the field-effect tube is grounded;
and one end of the sixth resistive element is connected with the drain electrode of the field effect transistor, and the other end of the sixth resistive element is connected with a power supply.
Optionally, the field effect transistor is an insulated gate field effect transistor.
Optionally, the controller is configured to identify a corresponding touch operation according to the touch signal, and specifically includes:
when the touch signal corresponds to the detection circuit arranged on any one of the chain links, recognizing the touch operation as a key operation;
recognizing the touch operation as a holding operation when the touch signal corresponds to the detection circuit provided on the plurality of links.
Optionally, the controller is configured to identify a corresponding touch operation according to the touch signal, and specifically includes:
and when the touch signal comprises a plurality of continuous sub-touch signals which sequentially correspond to the detection circuits arranged on the adjacent links, identifying the touch operation as a sliding operation.
In a second aspect, the present application provides a wearable device comprising:
a watch body;
the watch band is connected with the watch body and comprises a plurality of chain links which are sequentially connected end to end, and the chain links are provided with the touch recognition detection circuit in any one of the embodiments.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the method provided by the embodiment of the application, the touch recognition detection circuit is arranged on the watchband of the wearable device and comprises the following steps: detecting a power supply; the detection circuit is arranged on the chain link and comprises a first contact, a second contact and a shunt resistor, the first contact is connected with a detection power supply, the second contact is connected with one end of the shunt resistor, and the other end of the shunt resistor is grounded; the input end of the gain amplification circuit is connected in parallel with the two ends of the shunt resistor, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor and outputting the amplified voltage signal as a detection signal; the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal; the input end of the signal conversion circuit is connected with the output end of the detection circuit, the output end of the signal conversion circuit is connected with the controller, and the signal conversion circuit is used for converting the detected detection signal into a corresponding touch signal; and the controller is connected with the signal conversion circuit and is used for identifying corresponding touch operation according to the touch signal. The touch identification detection circuit detects the touch events of the skin of the human finger and the watchband, so that the watchband of the wearable device is integrally changed into an interactive region, the interactive region of the wearable device is greatly increased, the interactive operation of a user and the wearable device is more convenient, meanwhile, the touch identification detection circuit is simple in structural design, reliable in performance and high in sensitivity, the user operation experience can be effectively improved, and meanwhile, the touch identification detection circuit has low production cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic hardware structure diagram of an implementation manner of a wearable device according to an embodiment of the present invention;
fig. 2 is a hardware schematic diagram of an implementation of a wearable device provided in an embodiment of the present application;
fig. 3 is a hardware schematic diagram of an implementation of a wearable device provided in an embodiment of the present application;
fig. 4 is a hardware schematic diagram of an implementation manner of a wearable device provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a touch recognition detection circuit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a wearable device provided in an embodiment of the present application;
FIG. 7 is a signal diagram of a touch recognition detection circuit according to an embodiment of the present disclosure;
fig. 8 is a signal communication diagram of a controller of a touch recognition detection circuit according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The wearable device provided by the embodiment of the invention comprises a mobile terminal such as an intelligent bracelet, an intelligent watch, an intelligent mobile phone and the like. With the continuous development of screen technologies, screen forms such as flexible screens and folding screens appear, and mobile terminals such as smart phones can also be used as wearable devices. The wearable device provided in the embodiment of the present invention may include: a Radio Frequency (RF) unit, a WiFi module, an audio output unit, an a/V (audio/video) input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply.
In the following description, a wearable device will be taken as an example, please refer to fig. 1, which is a schematic diagram of a hardware structure of a wearable device for implementing various embodiments of the present invention, where the wearable device 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the wearable device structure shown in fig. 1 does not constitute a limitation of the wearable device, and that the wearable device may include more or fewer components than shown, or combine certain components, or a different arrangement of components.
The following describes the various components of the wearable device in detail with reference to fig. 1:
the rf unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, the rf unit 101 may transmit uplink information to a base station, in addition, the downlink information sent by the base station may be received and then sent to the processor 110 of the wearable device for processing, the downlink information sent by the base station to the radio frequency unit 101 may be generated according to the uplink information sent by the radio frequency unit 101, or may be actively pushed to the radio frequency unit 101 after detecting that the information of the wearable device is updated, for example, after detecting that the geographic location where the wearable device is located changes, the base station may send a message notification of the change in the geographic location to the radio frequency unit 101 of the wearable device, and after receiving the message notification, the message notification may be sent to the processor 110 of the wearable device for processing, and the processor 110 of the wearable device may control the message notification to be displayed on the display panel 1061 of the wearable device; typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 may also communicate with a network and other devices through wireless communication, which may specifically include: the server may push a message notification of resource update to the wearable device through wireless communication to remind a user of updating the application program if the file resource corresponding to the application program in the server is updated after the wearable device finishes downloading the application program. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
In one embodiment, the wearable device 100 may access an existing communication network by inserting a SIM card.
In another embodiment, the wearable device 100 may be configured with an esim card (Embedded-SIM) to access an existing communication network, and by using the esim card, the internal space of the wearable device may be saved, and the thickness may be reduced.
It is understood that although fig. 1 shows the radio frequency unit 101, it is understood that the radio frequency unit 101 does not belong to the essential constituents of the wearable device, and can be omitted entirely as required within the scope not changing the essence of the invention. The wearable device 100 may implement a communication connection with other devices or a communication network through the wifi module 102 alone, which is not limited by the embodiments of the present invention.
WiFi belongs to short-distance wireless transmission technology, and the wearable device can help a user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband Internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the wearable device, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the wearable device 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the wearable device 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
In one embodiment, the wearable device 100 includes one or more cameras, and by turning on the cameras, capturing of images can be realized, functions such as photographing and recording can be realized, and the positions of the cameras can be set as required.
The wearable device 100 also includes at least one sensor 105, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or the backlight when the wearable device 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), and the like.
In one embodiment, the wearable device 100 further comprises a proximity sensor, and the wearable device can realize non-contact operation by adopting the proximity sensor, so that more operation modes are provided.
In one embodiment, the wearable device 100 further comprises a heart rate sensor, which, when worn, enables detection of heart rate by proximity to the user.
In one embodiment, the wearable device 100 may further include a fingerprint sensor, and by reading the fingerprint, functions such as security verification can be implemented.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
In one embodiment, the display panel 1061 is a flexible display screen, and when the wearable device using the flexible display screen is worn, the screen can be bent, so that the wearable device is more conformable. Optionally, the flexible display screen may adopt an OLED screen body and a graphene screen body, in other embodiments, the flexible display screen may also be made of other display materials, and this embodiment is not limited thereto.
In one embodiment, the display panel 1061 of the wearable device may take a rectangular shape to wrap around when worn. In other embodiments, other approaches may be taken.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the wearable device. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
In one embodiment, the side of the wearable device 100 may be provided with one or more buttons. The button can realize various modes such as short-time pressing, long-time pressing, rotation and the like, thereby realizing various operation effects. The number of the buttons can be multiple, and different buttons can be combined for use to realize multiple operation functions.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the wearable device, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the wearable device, and is not limited herein. For example, when receiving a message notification of an application through the rf unit 101, the processor 110 may control the message notification to be displayed in a predetermined area of the display panel 1061, where the predetermined area corresponds to a certain area of the touch panel 1071, and may control the message notification displayed in the corresponding area of the display panel 1061 by performing a touch operation on the certain area of the touch panel 1071.
The interface unit 108 serves as an interface through which at least one external device is connected to the wearable apparatus 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the wearable apparatus 100 or may be used to transmit data between the wearable apparatus 100 and the external device.
In one embodiment, the interface unit 108 of the wearable device 100 is configured as a contact, and is connected to another corresponding device through the contact to implement functions such as charging and connection. The contact can also be waterproof.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the wearable device, connects various parts of the entire wearable device by various interfaces and lines, and performs various functions of the wearable device and processes data by running or executing software programs and/or modules stored in the memory 109 and calling up data stored in the memory 109, thereby performing overall monitoring of the wearable device. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The wearable device 100 may further include a power source 111 (such as a battery) for supplying power to various components, and preferably, the power source 111 may be logically connected to the processor 110 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system.
Although not shown in fig. 1, the wearable device 100 may further include a bluetooth module or the like, which is not described in detail herein. The wearable device 100 can be connected with other terminal devices through Bluetooth, so that communication and information interaction are realized.
Please refer to fig. 2-4, which are schematic structural diagrams of a wearable device according to an embodiment of the present invention. The wearable device in the embodiment of the invention comprises a flexible screen. When the wearable device is unfolded, the flexible screen is in a strip shape; when the wearable device is in a wearing state, the flexible screen is bent to be annular. Fig. 2 and 3 show the structural schematic diagram of the wearable device screen when the wearable device screen is unfolded, and fig. 4 shows the structural schematic diagram of the wearable device screen when the wearable device screen is bent.
Based on the hardware structure of the wearable device, various embodiments of the method are provided. Based on the above mobile terminal hardware structure and communication network system, the present invention provides various embodiments of the method.
The first embodiment:
as shown in fig. 5 and fig. 6, in this embodiment, a touch recognition detection circuit is provided for a wearable device, where the wearable device includes a watchband, and the watchband includes a plurality of links connected end to end in sequence, and the touch recognition detection circuit includes:
detecting a power source Vs;
the detection circuit is arranged on the chain link and comprises a first contact, a second contact and a shunt resistor Rshunt, the first contact is connected with the detection power supply, the second contact is connected with one end of the shunt resistor Rshunt, and the other end of the shunt resistor Rshunt is grounded;
the input end of the gain amplification circuit is connected in parallel with two ends of the shunt resistor Rshunt, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor Rshunt and then outputting the amplified voltage signal as a detection signal;
the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal;
the input end of the signal conversion circuit is connected with the output end of the detection circuit, the output end of the signal conversion circuit is connected with the controller, and the signal conversion circuit is used for converting the detected signal into a corresponding touch signal;
the controller is connected with the signal conversion circuit and used for identifying corresponding touch operation according to the touch signal.
In practical application, the watchband is composed of a plurality of chain links, each chain link is provided with a touch recognition detection circuit, each touch recognition detection circuit is composed of a detection circuit, a gain amplification circuit, a detection circuit and a signal conversion circuit, and finally detected touch signals are transmitted to the controller. The touch identification detection circuit comprises a touch power supply, a first contact, a second contact and a shunt resistor Rshunt, when no human skin (such as a finger) touches between the first contact and the second contact, the first contact and the second contact are in an off state, and no voltage exists at two ends of the shunt resistor Rshunt. When human skin contacts the first contact and the second contact, a series flow loop is formed among the detection power source Vs, the human body resistor and the shunt resistor Rshunt, voltages are generated at two ends of the shunt resistor Rshunt, voltage signals at two ends of the shunt resistor Rshunt can be detected at the moment, the voltage signals are amplified by the gain amplification circuit, detected by the detection circuit, converted into touch signals through the signal conversion circuit and sent to a corresponding port of the processor, and then the touch signals are identified.
Optionally, the first contact and the second contact may be provided in plurality, the plurality of first contacts are connected in series, the plurality of second contacts are connected in series, and when human skin contacts any one of the first contacts and any one of the second contacts, the first contact is communicated with the second contact.
In this embodiment, optionally, as shown in fig. 5 and 6, the gain amplifying circuit includes: an operational amplifier D1, wherein an output end of the operational amplifier D1 is connected with the signal conversion circuit; one end of the first resistive element R1 is connected to one end of the shunt resistor Rshunt, and the other end of the first resistive element R1 is connected to the positive electrode of the input end of the operational amplifier D1; and one end of the second resistive element R2 is connected to the other end of the shunt resistor Rshunt, and the other end of the second resistive element R2 is connected to the negative electrode of the input end of the operational amplifier D1.
Optionally, the gain amplifying circuit further includes:
and one end of the third resistive element R3 is connected to the other end of the second resistive element R2, and the other end of the third resistive element R3 is connected to an output end of the operational amplifier D1.
In practical applications, the OPA amplifier D1 is an OPA amplifier D1, such as OPA2604, and the OPA amplifier D1 itself has a power supply terminal connected to the power supply Vdd and a ground terminal connected to ground. The gain amplification circuit performs gain amplification on the amplitude of the voltage signal at the two ends of the shunt resistor Rshunt through the operational amplifier D1, so that the voltage signal can be accurately identified when skin with various impedance values is contacted, the signal-to-noise ratio is improved, and the detection sensitivity of the touch identification detection circuit is effectively improved.
In this embodiment, optionally, as shown in fig. 5 and 6, the detector circuit includes:
one end of the unidirectional conducting element is connected with the output end of the gain amplifying circuit, and the conducting direction of the unidirectional conducting element is opposite to the output direction of the gain amplifying circuit;
and one end of the fourth resistive element R4 is connected to the other end of the unidirectional conducting element, and the other end of the fourth resistive element R4 is connected to the signal conversion circuit.
Optionally, the detection circuit further includes:
one end of the capacitive element C is connected with the other end of the fourth resistive element R4, and the other end of the capacitive element C is grounded;
and a fifth resistive element R5, one end of the fifth resistive element R5 being connected to the other end of the fourth resistive element R4, and the other end of the fifth resistive element R5 being grounded.
In practical application, the detection circuit has the functions of detection and energy storage, and specifically, the detection circuit can store the energy of the detection signal output by the gain amplification circuit through the capacitive element C, simultaneously carry out forward detection on the alternating current signal through the single-phase conducting element, and finally store the direct current and alternating current signals in the capacitive element C. The fifth resistive element R5 is used to divide the energy stored by the capacitive element C, which is released through the fifth resistive element R5 after the human skin has been detached from the first and second contacts. Because there is power frequency interference in the commercial power environment, therefore there will be alternating current noise, and the electrical signal can be absorbed by the human body, when the human skin contacts the contact area of chain link, the electrical signal enters the gain amplification circuit after passing through the human skin resistance and the first resistive element R1, and then enters the detection circuit, and the detection circuit can effectively receive the direct current signal and the alternating current signal amplified by the gain amplification circuit, and realizes the control to the signal conversion circuit after the energy is stored through the capacitive element C.
Specifically, the detector circuit operates as shown in FIG. 7, wherein signal 702 is an AC signal that includes a DC component, has a frequency of 50Hz, and has a maximum amplitude of 4.4V and a minimum amplitude of 0.4V. The signal 704 is an approximate direct current signal after being detected and stored by the detection circuit, and the alternating current amplitude of the signal is one sixth of the input alternating current signal, so that the minimum value of the signal is greatly improved, and the sensitivity of the touch identification detection circuit is further improved.
In this embodiment, optionally, as shown in fig. 8, the signal conversion circuit includes:
a power supply VddIO;
a field effect transistor D2, a grid electrode of the field effect transistor D2 is connected with an output end of the detection circuit, a drain electrode of the field effect transistor D2 is connected with the power supply and the controller, and a source electrode of the field effect transistor D2 is grounded;
and one end of the sixth resistive element R6, one end of the sixth resistive element R6 is connected with the drain of the field-effect tube D2, and the other end of the sixth resistive element R6 is connected with a power supply.
Optionally, the fet D2 is an insulated gate fet D2.
In practical application, the signal conversion circuit is used for performing electric frequency conversion on the output signal of the detection circuit in a time-limited mode, and the signal conversion circuit is connected with a controller (such as an AP or an MCU) so as to effectively report the time-limited skin contact time. When the skin of the human body is effectively contacted with the first contact and the second contact, the effective value of the touch signal output by the detection circuit is higher than the conducting voltage value Vgs of the field-effect tube D2, the field-effect tube D2 is conducted at the moment, so that the output value KEY _ IO of the signal conversion circuit is set to be at a low level, and the controller confirms that the corresponding chain link is touched by the skin at the moment. When the human skin leaves the contact, the capacitive element C in the detector circuit discharges electricity through the fifth resistive element R5, the effective value of the output signal of the detector circuit is lower than Vgs, the field-effect tube D2 is cut off, the output value KEY _ IO of the signal conversion circuit is set to be high level, and the controller confirms that the touch event of the corresponding chain link is finished and the finger of the user is removed.
In this embodiment, optionally, as shown in fig. 8, the controller is configured to identify a corresponding touch operation according to the touch signal, specifically:
when the touch signal corresponds to the detection circuit arranged on any one of the chain links, recognizing the touch operation as a key operation;
recognizing the touch operation as a holding operation when the touch signal corresponds to the detection circuit provided on a plurality of the links;
and when the touch signal comprises a plurality of continuous sub-touch signals which sequentially correspond to the detection circuits arranged on the adjacent links, identifying the touch operation as a sliding operation.
In practical application, the watchband comprises n chain links of end to end, all is provided with corresponding detection circuitry on every chain link. The time values of the detection circuits corresponding to the 1 st to n th chain links are KEY _ IO1 and KEY _ IO2 … … KEY _ IOn respectively, and are input to corresponding ports GPIO1 and GPIO2 … … GPIO on the controller respectively. When a user touches a contact on the nth link, a touch signal corresponding to the detection circuit of the corresponding link is recorded as a touch signal n, and an event value KEY _ IOn is reported as a LOW Level (LOW), and at this time, the controller (MCU/AP) confirms the KEY operation for the nth link. When a user touches contacts on multiple links at the same time, for example, the contacts on the links 1, 2, and 3 are triggered at the same time, the corresponding reported event values KEY _ IO1, KEY _ IO2, and KEY _ IO3 are all at low level, and at this time, the controller confirms the holding operation for the watchband. When a user continuously touches contacts on the plurality of links in a certain sequence, for example, according to the sequence of sequentially touching the 4 th link, the 5 th link and the 6 th link, event values KEY _ IO4 are reported to be low level, KEY _ IO4 is high level, KEY _ IO5 is low level, KEY _ IO5 is high level, KEY _ IO6 is low level and KEY _ IO6 is high level in sequence according to the time sequence of triggering the contacts, and at this time, the controller confirms the sliding operation of the plurality of links on the watchband.
Second embodiment:
as shown in fig. 6, in the present embodiment, there is provided a wearable device including:
a watch body;
the watchband is connected with the watch body and comprises a plurality of chain links which are sequentially connected end to end, and the chain links are provided with the touch recognition detection circuit in the first embodiment. Therefore, the wearable device includes all the beneficial effects of the touch recognition detection circuit described in the first embodiment, which are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a touch identification detection circuit for wearable equipment, wearable equipment includes the watchband, the watchband includes a plurality of end to end's chain link in proper order, all is provided with touch identification detection circuit on every chain link, its characterized in that, touch identification detection circuit includes:
detecting a power supply;
the detection circuit is arranged on the chain link and comprises a plurality of first contacts, a plurality of second contacts and a shunt resistor, the first contacts are connected with the detection power supply, the second contacts are connected with one end of the shunt resistor, the other end of the shunt resistor is grounded, the number of the first contacts and the number of the second contacts are multiple, the first contacts are mutually connected in series, the second contacts are mutually connected in series, and when human skin contacts any one of the first contacts and any one of the second contacts, the first contacts are communicated with the second contacts;
the input end of the gain amplification circuit is connected in parallel with the two ends of the shunt resistor, and the gain amplification circuit is used for amplifying the voltage signal on the shunt resistor and outputting the amplified voltage signal as a detection signal;
the input end of the detection circuit is connected with the output end of the gain amplification circuit and is used for detecting the detection signal and storing and releasing the energy of the detection signal through a capacitive element;
the input end of the signal conversion circuit is connected with the output end of the detection circuit, the output end of the signal conversion circuit is connected with the controller, and the signal conversion circuit is used for converting the detected detection signal into a corresponding touch signal;
the controller is connected with the signal conversion circuit and used for identifying corresponding touch operation according to the touch signal.
2. The touch recognition detection circuit of claim 1, wherein the gain amplification circuit comprises:
the output end of the operational amplifier is connected with the signal conversion circuit;
one end of the first resistive element is connected with one end of the shunt resistor, and the other end of the first resistive element is connected with the anode of the input end of the operational amplifier;
and one end of the second resistive element is connected with the other end of the shunt resistor, and the other end of the second resistive element is connected with the negative electrode of the input end of the operational amplifier.
3. The touch recognition detection circuit of claim 2, wherein the gain amplification circuit further comprises:
and one end of the third resistive element is connected with the other end of the second resistive element, and the other end of the third resistive element is connected with the output end of the amplifier.
4. The touch recognition detection circuit of claim 1, wherein the detection circuit comprises:
one end of the unidirectional conducting element is connected with the output end of the gain amplifying circuit, and the conducting direction of the unidirectional conducting element is opposite to the output direction of the gain amplifying circuit;
and one end of the fourth resistive element is connected with the other end of the one-way conduction element, and the other end of the fourth resistive element is connected with the signal conversion circuit.
5. The touch recognition detection circuit of claim 4, wherein the detection circuit further comprises:
one end of the capacitive element is connected with the other end of the fourth resistive element, and the other end of the capacitive element is grounded;
and one end of the fifth resistive element is connected with the other end of the fourth resistive element, and the other end of the fifth resistive element is grounded.
6. The touch recognition detection circuit of claim 1, wherein the signal conversion circuit comprises:
a power supply source;
the grid electrode of the field-effect tube is connected with the output end of the detection circuit, the drain electrode of the field-effect tube is connected with the power supply and the controller, and the source electrode of the field-effect tube is grounded;
and one end of the sixth resistive element is connected with the drain electrode of the field effect transistor, and the other end of the sixth resistive element is connected with a power supply.
7. The touch recognition detection circuit of claim 6, wherein the fet is an insulated gate fet.
8. The touch recognition detection circuit of claim 1, wherein the controller is configured to recognize a corresponding touch operation according to the touch signal, and specifically:
when the touch signal corresponds to the detection circuit arranged on any one of the chain links, recognizing the touch operation as a key operation;
recognizing the touch operation as a holding operation when the touch signal corresponds to the detection circuit provided on the plurality of links.
9. The touch recognition detection circuit of claim 1, wherein the controller is configured to recognize a corresponding touch operation according to the touch signal, and specifically:
and when the touch signal comprises a plurality of continuous sub-touch signals which sequentially correspond to the detection circuits arranged on the adjacent links, identifying the touch operation as a sliding operation.
10. A wearable device, comprising:
a watch body;
the watch band is connected with the watch body and comprises a plurality of chain links which are sequentially connected end to end, and the chain links are provided with the touch recognition detection circuit as claimed in any one of claims 1 to 9.
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