CN113131936A - Signal generation method and wearable device - Google Patents
Signal generation method and wearable device Download PDFInfo
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- CN113131936A CN113131936A CN202110260196.8A CN202110260196A CN113131936A CN 113131936 A CN113131936 A CN 113131936A CN 202110260196 A CN202110260196 A CN 202110260196A CN 113131936 A CN113131936 A CN 113131936A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Abstract
The application discloses a signal generation method, which is applied to wearable equipment, wherein the wearable equipment comprises a digital-to-analog converter and a luminous element, and the digital-to-analog converter is connected with the luminous element and is used for outputting a driving current to the luminous element so as to drive the luminous element to emit light; the method comprises the following steps: acquiring a target intensity expected value, wherein the target intensity expected value represents the signal intensity of a target signal to be generated; adjusting the measuring range and the conversion digit of the digital-to-analog converter, and controlling the light-emitting element to emit light rays corresponding to the target intensity expected value; and collecting the reflected light of the light to generate the target signal. The method can reduce power consumption of the wearable device and possible light pollution.
Description
Technical Field
The present disclosure relates to the technical field of wearable devices, and more particularly, to a signal generation method and a wearable device.
Background
Wearable equipment can generally send light through driving its built-in illuminating part, later, gathers the reflection light of this light of user's skin reflection to according to this reflection light, generate the signal of the health information of representation user, for example, photoplethysmography (PPG), with according to this signal, detect user's health information, and to this health information of user's propelling movement, make the user can in time know own health.
However, the intensity of the finally obtained detection signal is generally improved by excessively improving the light intensity emitted by the light emitting member in the conventional wearable device so as to achieve the effect of improving the accuracy of the health information, and the problems of overlarge power consumption and overlarge light pollution exist.
Disclosure of Invention
It is an object of embodiments of the present disclosure to provide a new solution for generating a signal.
According to a first aspect of the present disclosure, there is provided a signal generating method, applied to a wearable device, where the wearable device includes a digital-to-analog converter and a light emitting element, where the digital-to-analog converter is connected to the light emitting element and is configured to output a driving current to the light emitting element to drive the light emitting element to emit light; the method comprises the following steps:
acquiring a target intensity expected value, wherein the target intensity expected value represents the signal intensity of a target signal to be generated;
adjusting the measuring range and the conversion digit of the digital-to-analog converter, and controlling the light-emitting element to emit light rays corresponding to the target intensity expected value;
and collecting the reflected light of the light to generate the target signal.
Optionally, the adjusting the range and the conversion number of the digital-to-analog converter to control the light emitting element to emit light corresponding to the target intensity desired value includes:
setting the measuring range as a first measuring range;
and under the condition that the first measuring range is smaller than a preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
Optionally, the adjusting the conversion bit number and the digital quantity of the driving current to control the light emitting element to emit the light includes:
setting the conversion bit number to a first bit number, and setting the digital quantity of the drive current to a maximum digital quantity corresponding to the first bit number;
controlling the light-emitting member to emit first light with first intensity according to the first digit and the maximum digit;
collecting first reflected light of the first light to generate a first signal;
setting the measuring range as a second measuring range under the condition that the signal intensity of the first signal is smaller than the signal intensity represented by the target intensity expected value, wherein the second measuring range is larger than the first measuring range;
and under the condition that the second measuring range is smaller than the preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
Optionally, in a case that the signal strength of the first signal is greater than the signal strength characterized by the target strength expected value, the method further includes:
setting the conversion digit to be a second digit, wherein the second digit is greater than the first digit;
and under the condition that the second digit is not greater than the threshold value of the preset digit, adjusting the digital quantity of the driving current and controlling the light-emitting piece to emit the light.
Optionally, the number of the digital-to-analog converters is multiple, and the multiple digital-to-analog converters are connected in parallel.
Optionally, the wearable device further comprises a photoelectric sensor and an analog-to-digital converter, wherein the photoelectric sensor is connected with the analog-to-digital converter;
the collecting reflected light of the light to generate the target signal includes:
controlling the photoelectric sensor to collect reflected light of the light to obtain a target electric signal;
and obtaining the target signal through the analog-to-digital converter according to the target electric signal.
Optionally, the target signal comprises a photoplethysmographic signal.
According to a second aspect of the present disclosure, there is also provided a wearable device, including a digital-to-analog converter and a light emitting element, where the digital-to-analog converter is connected to the light emitting element and is configured to output a driving current to the light emitting element to drive the light emitting element to emit light; the wearable device further comprises:
the system comprises an intensity expected value acquisition module, a signal processing module and a signal processing module, wherein the intensity expected value acquisition module is used for acquiring a target intensity expected value, and the target intensity expected value represents the signal intensity of a target signal to be generated;
the dimming module is used for adjusting the measuring range and the conversion digit of the digital-to-analog converter and controlling the light-emitting element to emit light rays corresponding to the target intensity expected value;
and the signal generation module is used for collecting the reflected light of the light and generating the target signal.
Optionally, the dimming module comprises:
the range setting submodule is used for setting the range to be a first range;
and the dimming submodule is used for adjusting the conversion digit and the digital quantity of the driving current to control the light emitting element to emit the light rays under the condition that the first measuring range is smaller than a preset measuring range threshold value.
According to a third aspect of the present disclosure, there is also provided another wearable device, including:
a memory for storing executable instructions;
a processor configured to execute the wearable device according to the control of the instruction to perform the method according to the first aspect of the disclosure.
One advantage of the present disclosure is that according to the method of the embodiment of the present disclosure, when a wearable device needs to generate a target signal, by obtaining a target intensity expected value representing a signal intensity of the target signal, and then by adjusting a range and a conversion bit number of a digital-to-analog converter built in the wearable device, a light emitting element built in the wearable device is controlled to emit light corresponding to the target intensity expected value, so as to generate the target signal according to reflected light of the light. After the target intensity expected value is obtained, the wearable device can accurately adjust the intensity of light emitted by the light emitting element of the wearable device in a mode of coarse adjustment and fine adjustment by adjusting the measuring range and the conversion digit of the digital-to-analog converter, so that the power consumption and possible light pollution of the wearable device are reduced in the process of generating the target signal.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic flow chart of a signal generation method according to an embodiment of the present disclosure.
Fig. 2 is a generation process intention of a target signal provided by an embodiment of the present disclosure.
Fig. 3 is a functional block diagram of a wearable device provided in an embodiment of the present disclosure.
Fig. 4 is a hardware structure schematic diagram of another wearable device provided in the embodiments of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
< method examples >
Fig. 1 is a schematic flow chart of a signal generation method provided in an embodiment of the present disclosure, which may be implemented by a wearable device, and more specifically, may be implemented by a wearable device, where the wearable device may be, for example, a wearable watch, a wearable bracelet, and the like, and is not limited herein.
Referring to fig. 1, the method of the present embodiment may include the following steps S1100-S1300, which will be described in detail below.
Step S1100, a target intensity expected value is obtained, wherein the target intensity expected value represents the signal intensity of a target signal to be generated.
In this embodiment, the target signal may be a detection signal representing the health condition of the user, and the signal may be, for example, a photoplethysmographic signal, also referred to as a PPG signal.
In specific implementation, when the wearable device detects the health condition of the user, the wearable device may first drive the light emitting element, for example, the light emitting LED diode, to emit light, and then collect reflected light of the light reflected by the skin of the user by using the built-in photoelectric sensor, for example, the photodiode; then, a detection signal representing the health condition is generated by an analog-to-digital converter (ADC), and user health information is obtained based on the signal.
However, in practice, the detection signal is easily affected by human factors, such as the wearing of the wearable device is too loose, the wearing position difference, physiological factors, for example, the skin difference of the wearer, and so on, and therefore, it is generally required that the detection signal is not less than the preset intensity value, so that the signal quality can be improved to improve the accuracy of the detected health information.
In the process of implementing the present application, the inventor finds that, in the existing wearable device, the signal intensity of the detection signal generated by the wearable device is related to the intensity of the light emitted by the light emitting element thereof, that is, when the light is strong, the reflected light collected by the wearable device is often strong, so that the signal intensity of the detection signal generated by the wearable device is also strong; when the light-emitting member emits light, the reflected light collected by the light-emitting member is also weak, which results in a weak signal intensity of the detection signal generated by the light-emitting member. Therefore, in the prior art, the excessive light emitting element is often adopted, for example, the light emitting diode emits light intensity to improve the intensity of the detection signal, which can improve the accuracy of the health information, but often brings the problems of large power consumption and light pollution, and easily affects the user experience of using the wearable device.
In addition, the inventors have also found that the main causes of the above problems are: in the current wearable device, the number of conversion bits of a digital-to-analog converter (DAC) for providing a driving current for a light emitting element is usually only 8 bits, and the measurement range is also fixed, which results in a resolution of the DAC, that is, the capability of resolving the minimum voltage or current is fixed, so that the driving current output to the light emitting LED is large, and the above problem is caused.
In order to solve the above problem, in the signal generating method provided in this embodiment, by integrating a digital-to-analog converter with adjustable measurement range and conversion bit number in the wearable device, for a target signal to be generated, first, a signal intensity expected value of the target signal to be generated, that is, a target intensity expected value, is obtained by the wearable device, and by adjusting the measurement range and the conversion bit number of the digital-to-analog converter, a driving current is accurately provided to the light emitting element, so that the wearable device can produce the target signal with as little power consumption as possible. In particular, the target intensity expected value may be preset by a user, and the intensity may be, for example, 50000, or may be other values, which is not limited herein.
Step S1200, adjusting the range and the conversion digit of the digital-to-analog converter, and controlling the light emitting element to emit light corresponding to the desired target intensity value.
In practice, the driving current output by the digital-to-analog converter can generally use the formula:
wherein, I represents the driving current output by the digital-to-analog converter, Data represents the digital quantity of the driving current, Range represents the measuring Range of the digital-to-analog converter, and n represents the conversion bit number of the digital-to-analog converter. Therefore, the magnitude of the driving current output by the digital-to-analog converter corresponds to Data, and the conversion accuracy is related to the measuring range and the conversion digit. Therefore, in the present embodiment, by integrating the digital-to-analog converter with adjustable measurement range and conversion bit number in the wearable device, after obtaining the target intensity desired value of the target signal, the light emitting element of the wearable device is controlled to emit light corresponding to the target intensity desired value by adjusting the measurement range and the conversion bit number.
In a specific implementation, the adjusting the range and the conversion number of the digital-to-analog converter to control the light emitting element to emit the light corresponding to the target intensity expected value includes: setting the measuring range as a first measuring range; and under the condition that the first measuring range is smaller than a preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
In this embodiment, the driving current for driving the light emitting element to emit light may be controlled in a manner of coarse adjustment and then fine adjustment. Specifically, the ranges of the digital-to-analog converters may be set in the order of the smaller range to the larger range, that is, the range of the digital-to-analog converter is first set as the initial range, and the driving current output at the initial range drives the light emitted by the light emitting member by adjusting the number of conversion bits and the digital amount of the driving current, so that the range of the digital-to-analog converter is continuously set as the next range to control the light emitting member to emit the light capable of accurately generating the light corresponding to the target intensity expected value when the signal intensity of the generated target signal is lower than the signal intensity represented by the target intensity expected value.
Namely, the adjusting the conversion bit number and the digital quantity of the driving current controls the light emitting element to emit the light, including: setting the conversion bit number to a first bit number, and setting the digital quantity of the drive current to a maximum digital quantity corresponding to the first bit number; controlling the light-emitting member to emit first light with first intensity according to the first digit and the maximum digit; collecting first reflected light of the first light to generate a first signal; setting the measuring range as a second measuring range under the condition that the signal intensity of the first signal is smaller than the signal intensity represented by the target intensity expected value, wherein the second measuring range is larger than the first measuring range; and under the condition that the second measuring range is smaller than the preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
Specifically, the wearable device may first fix a range value, determine whether the signal strength of the generated target signal, e.g., the PPG signal, is within a desired signal strength by adjusting the digital amount of the driving current, if not, boost the current range to the next range, and repeat the above steps until the signal strength of the target signal generated by the wearable device is within the desired signal strength.
In addition, in order to reduce power consumption and possible light pollution as much as possible, after the signal intensity of the target signal generated by the wearable device is within the expected signal intensity through the steps, the signal intensity can be further finely adjusted, in the measuring range, the resolution ratio of the wearable device is improved by adjusting the conversion digit number of the wearable device, the driving current is accurately output to the light-emitting element by adjusting the digital stream of the driving current, and the problem that the power consumption and the light pollution are increased due to too strong light emitted by the light-emitting element is solved.
That is, in this embodiment, in the case that the signal strength of the first signal is greater than the signal strength characterized by the target strength expected value, the method further includes: setting the conversion digit to be a second digit, wherein the second digit is greater than the first digit; and under the condition that the second digit is not greater than the threshold value of the preset digit, adjusting the digital quantity of the driving current and controlling the light-emitting piece to emit the light.
It should be noted that, in the implementation, there is an upper limit to the range of the single dac due to the limitation of the technology, and therefore, there is an upper limit to the driving current that the single dac finally outputs, and therefore, there may be a case that the single dac cannot emit the driving current satisfying the condition as the light emitting element to drive the light emitting element to emit the light corresponding to the desired value of the target intensity. Therefore, in the present embodiment, in order to improve the applicability of the method, the number of the digital-to-analog converters in the wearable device may be multiple, and the multiple digital-to-analog converters are connected in parallel to combine and provide the driving current to the light-emitting member, so that the light-emitting member can emit the light corresponding to the target intensity desired value.
In this embodiment, the wearable device may include a switch element in one-to-one correspondence with the plurality of digital-to-analog converters, and in specific implementation, one switch element in the plurality of digital-to-analog converters may be controlled to be closed, and the signal generation method may be used to determine whether a target signal with a signal intensity that is a target intensity desired value can be generated; if the signal intensity is not satisfied, the wearable device may control at least one switching element corresponding to each of the other digital-to-analog converters in the plurality of digital-to-analog converters to be closed, so as to increase a value of the driving current for driving the light-emitting element to emit light, so that the wearable device may generate a target signal with the signal intensity being the target intensity expected value.
After step S1200, step S1300 is executed to collect the reflected light of the light and generate the target signal.
Please refer to fig. 2, which is a generation process intent of a target signal provided by an embodiment of the present disclosure, wherein the obstruction shown in fig. 2 may be, for example, a user's skin. As shown in fig. 2, in this embodiment, the wearable device may further include a photoelectric sensor, such as a photodiode and an analog-to-digital converter, the collecting reflected light of the light, and generating the target signal, including: controlling the photoelectric sensor to collect reflected light of the light to obtain a target electric signal; and obtaining the target signal through the analog-to-digital converter according to the target electric signal.
In summary, in this embodiment, for a wearable device including a digital-to-analog converter and a light emitting element, the method provided by this embodiment obtains a target intensity expected value representing a signal intensity of a target signal to be generated, and then controls the built-in light emitting element to emit light corresponding to the target intensity expected value by adjusting a range and a conversion bit number of the built-in digital-to-analog converter, so as to generate the target signal according to reflected light of the light. After the target intensity expected value is obtained, the wearable device can accurately adjust the intensity of light emitted by the light emitting element of the wearable device in a mode of coarse adjustment and fine adjustment by adjusting the measuring range and the conversion digit of the digital-to-analog converter, so that the power consumption and possible light pollution of the wearable device are reduced in the process of generating the target signal.
< first embodiment of the apparatus >
Corresponding to the above method embodiments, in this embodiment, a wearable device is further provided, and as shown in fig. 3, the apparatus 3000 may include an expected intensity value obtaining module 3100, a dimming module 3200, and a signal generating module 3300.
The expected intensity value acquiring module 3100 is configured to acquire an expected target intensity value, where the expected target intensity value represents a signal intensity of a target signal to be generated.
The dimming module 3200 is configured to adjust a range and a conversion bit of the dac, and control the light emitting element to emit light corresponding to the desired target intensity value.
In one embodiment, the dimming module 3200 includes:
the range setting submodule is used for setting the range to be a first range;
and the dimming submodule is used for adjusting the conversion digit and the digital quantity of the driving current to control the light emitting element to emit the light rays under the condition that the first measuring range is smaller than a preset measuring range threshold value.
In this embodiment, when the dimming sub-module adjusts the conversion bit number and the digital amount of the driving current to control the light emitting element to emit the light, it may be configured to:
setting the conversion bit number to a first bit number, and setting the digital quantity of the drive current to a maximum digital quantity corresponding to the first bit number;
controlling the light-emitting member to emit first light with first intensity according to the first digit and the maximum digit;
collecting first reflected light of the first light to generate a first signal;
setting the measuring range as a second measuring range under the condition that the signal intensity of the first signal is smaller than the signal intensity represented by the target intensity expected value, wherein the second measuring range is larger than the first measuring range;
and under the condition that the second measuring range is smaller than the preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
In this embodiment, in the case that the signal strength of the first signal is greater than the signal strength characterized by the target strength desired value, the dimming sub-module may be further configured to:
setting the conversion digit to be a second digit, wherein the second digit is greater than the first digit;
and under the condition that the second digit is not greater than the threshold value of the preset digit, adjusting the digital quantity of the driving current and controlling the light-emitting piece to emit the light.
The signal generating module 3300 is configured to collect reflected light of the light, and generate the target signal.
In one embodiment, the wearable device further comprises a photoelectric sensor and an analog-to-digital converter, wherein the photoelectric sensor is connected with the analog-to-digital converter; when the signal generating module 3300 collects the reflected light of the light to generate the target signal, it may be configured to:
controlling the photoelectric sensor to collect reflected light of the light to obtain a target electric signal;
and obtaining the target signal through the analog-to-digital converter according to the target electric signal.
< second device embodiment >
In this embodiment, another wearable device is also provided, as shown in fig. 4, the wearable device 4000 may further include a processor 4200 and a memory 4100, the memory 4100 being configured to store executable instructions; the processor 4200 is configured to operate the wearable device according to the control of the instructions to perform a signal generation method according to any embodiment of the present disclosure.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. It is well known to those skilled in the art that implementation by hardware, by software, and by a combination of software and hardware are equivalent.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A signal generation method is applied to a wearable device, the wearable device comprises a digital-to-analog converter and a luminous element, wherein the digital-to-analog converter is connected with the luminous element and is used for outputting a driving current to the luminous element so as to drive the luminous element to emit light; the method comprises the following steps:
acquiring a target intensity expected value, wherein the target intensity expected value represents the signal intensity of a target signal to be generated;
adjusting the measuring range and the conversion digit of the digital-to-analog converter, and controlling the light-emitting element to emit light rays corresponding to the target intensity expected value;
and collecting the reflected light of the light to generate the target signal.
2. The method of claim 1, wherein adjusting the range and the number of conversion bits of the dac controls the light emitting element to emit light corresponding to the desired target intensity value, comprises:
setting the measuring range as a first measuring range;
and under the condition that the first measuring range is smaller than a preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
3. The method of claim 2, wherein said adjusting said number of conversion bits and said digital amount of drive current controls said light emitting member to emit said light, comprising:
setting the conversion bit number to a first bit number, and setting the digital quantity of the drive current to a maximum digital quantity corresponding to the first bit number;
controlling the light-emitting member to emit first light with first intensity according to the first digit and the maximum digit;
collecting first reflected light of the first light to generate a first signal;
setting the measuring range as a second measuring range under the condition that the signal intensity of the first signal is smaller than the signal intensity represented by the target intensity expected value, wherein the second measuring range is larger than the first measuring range;
and under the condition that the second measuring range is smaller than the preset measuring range threshold value, adjusting the conversion digit and the digital quantity of the driving current, and controlling the light emitting piece to emit the light.
4. The method of claim 3, in the event that the signal strength of the first signal is greater than the signal strength characterized by the target strength expected value, the method further comprising:
setting the conversion digit to be a second digit, wherein the second digit is greater than the first digit;
and under the condition that the second digit is not greater than the threshold value of the preset digit, adjusting the digital quantity of the driving current and controlling the light-emitting piece to emit the light.
5. The method of claim 1, wherein the number of digital-to-analog converters is plural, and the plural digital-to-analog converters are connected in parallel.
6. The method of claim 1, the wearable device further comprising an opto-electronic sensor and an analog-to-digital converter, the opto-electronic sensor connected with the analog-to-digital converter;
the collecting reflected light of the light to generate the target signal includes:
controlling the photoelectric sensor to collect reflected light of the light to obtain a target electric signal;
and obtaining the target signal through the analog-to-digital converter according to the target electric signal.
7. The method of claim 1, the target signal being a photoplethysmographic signal.
8. A wearable device comprises a digital-to-analog converter and a luminous element, wherein the digital-to-analog converter is connected with the luminous element and is used for outputting a driving current to the luminous element so as to drive the luminous element to emit light; the wearable device further comprises:
the system comprises an intensity expected value acquisition module, a signal processing module and a signal processing module, wherein the intensity expected value acquisition module is used for acquiring a target intensity expected value, and the target intensity expected value represents the signal intensity of a target signal to be generated;
the dimming module is used for adjusting the measuring range and the conversion digit of the digital-to-analog converter and controlling the light-emitting element to emit light rays corresponding to the target intensity expected value;
and the signal generation module is used for collecting the reflected light of the light and generating the target signal.
9. The wearable device of claim 8, the dimming module comprising:
the range setting submodule is used for setting the range to be a first range;
and the dimming submodule is used for adjusting the conversion digit and the digital quantity of the driving current to control the light emitting element to emit the light rays under the condition that the first measuring range is smaller than a preset measuring range threshold value.
10. A wearable device, comprising:
a memory for storing executable instructions;
a processor configured to operate the wearable device to perform the method of any of claims 1-7 according to the control of the instructions.
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