CN108225296B - MEMS gyroscope, electronic equipment and control method of electronic equipment - Google Patents
MEMS gyroscope, electronic equipment and control method of electronic equipment Download PDFInfo
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- CN108225296B CN108225296B CN201810076466.8A CN201810076466A CN108225296B CN 108225296 B CN108225296 B CN 108225296B CN 201810076466 A CN201810076466 A CN 201810076466A CN 108225296 B CN108225296 B CN 108225296B
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- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/567—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using the phase shift of a vibration node or antinode
- G01C19/5677—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using the phase shift of a vibration node or antinode of essentially two-dimensional vibrators, e.g. ring-shaped vibrators
- G01C19/5684—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using the phase shift of a vibration node or antinode of essentially two-dimensional vibrators, e.g. ring-shaped vibrators the devices involving a micromechanical structure
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Abstract
The invention provides an MEMS gyroscope, electronic equipment and a control method of the electronic equipment, wherein the MEMS gyroscope comprises at least two mass blocks; the data acquisition unit is used for measuring the vibration deflection data of the mass block connected with the data acquisition unit; the connection state switching unit is connected with the data acquisition unit and used for switching the connection state when receiving a control signal and controlling the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block; the control signal is used for indicating that the first mass block resonates and the generated bottom noise meets a preset condition; the second mass block is the mass block except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different. The MEMS gyroscope provided by the invention can realize the switching of the mass block for acquiring the vibration deflection data, thereby avoiding the noise of the acquired vibration deflection data and improving the measurement accuracy.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an MEMS gyroscope, an electronic device, and a method for controlling an electronic device.
Background
With the development of electronic manufacturing technology, electronic devices such as mobile phones, tablet computers, and electronic books have become popular as indispensable tools in people's daily life, and people can realize communication, internet surfing, work, entertainment, and the like through the electronic devices. Micro Electro Mechanical Systems (MEMS) gyroscopes are used to accurately measure rotational and deflection movements, and are gradually applied to electronic devices, and perform corresponding operations on the electronic devices according to user movements, thereby improving user experience effects of the electronic devices.
The MEMS gyroscope generally comprises a gyroscope sensing assembly and a data acquisition unit, wherein the gyroscope sensing assembly is provided with a mass block, the mass block linearly vibrates or angularly vibrates in the gyroscope sensing assembly in the driving direction at a natural frequency, and the data acquisition unit can acquire vibration deflection data of the mass block and analyze the change of the angular velocity of the mass block according to the vibration deflection data so as to judge the action of a user of the electronic equipment.
However, the electronic device may cause capacitance vibration inside the electronic device during operation, such as: when the electronic equipment runs a large-scale game application program and is under a high load, in order to save electric energy, the power supply mode of the electronic equipment can be switched between a pulse width modulation mode and a pulse frequency modulation mode, and the ceramic capacitor can vibrate due to the change of frequency in the switching process. When the frequency of the vibration is close to or the same as the natural frequency of the mass block in the MEMS gyroscope, the mass block can be caused to resonate, so that the noise floor of the MEMS gyroscope is increased, and the measurement accuracy of the MEMS gyroscope is reduced.
Therefore, the existing MEMS gyroscope has the problem that the measurement accuracy is reduced due to large noise caused by mass block resonance.
Disclosure of Invention
The embodiment of the invention provides an MEMS gyroscope, electronic equipment and a control method of the electronic equipment, and the electronic equipment and the control method of the electronic equipment, so as to solve the problem that the measurement accuracy of the existing MEMS gyroscope is reduced due to large bottom noise caused by mass block resonance.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a MEMS gyroscope, including:
at least two mass blocks;
the data acquisition unit is used for measuring the vibration deflection data of the mass block connected with the data acquisition unit;
the connection state switching unit is connected with the data acquisition unit and used for switching the connection state when receiving a control signal and controlling the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block;
the control signal is used for indicating that the first mass block resonates and the generated bottom noise meets a preset condition; the second mass block is the mass block except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different.
In a second aspect, an embodiment of the present invention further provides an electronic device, including the MEMS gyroscope described above.
In a third aspect, an embodiment of the present invention further provides a method for controlling an electronic device, where the method is applied to the electronic device, and the method includes:
acquiring noise related data of a first mass block in the MEMS gyroscope;
judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data;
and if the first mass block is determined to resonate and the background noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted into a second mass block from the first mass block.
In a fourth aspect, the present invention further provides an electronic device, comprising:
the data acquisition module is used for acquiring noise related data of a first mass block in the MEMS gyroscope;
the judging module is used for judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data;
and the control module is used for sending a control signal to a connection state switching unit in the MEMS gyroscope to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block if the first mass block is determined to resonate and the bottom noise meets a preset condition.
In a fifth aspect, an embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the control method of the electronic device.
The MEMS gyroscope comprises at least two mass blocks; the data acquisition unit is used for measuring the vibration deflection data of the mass block connected with the data acquisition unit; the connection state switching unit is connected with the data acquisition unit and used for switching the connection state when receiving a control signal and controlling the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block; the control signal is used for indicating that the first mass block resonates and the generated bottom noise meets a preset condition; the second mass block is the mass block except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different. Therefore, when the mass block for acquiring the vibration deflection data in the MEMS gyroscope resonates and the generated noise meets the preset condition, the mass block with another different frequency can be switched to acquire the vibration deflection data, so that the acquired vibration deflection data is prevented from having noise, and the measurement accuracy is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a MEMS gyroscope provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of the vibration of two masses during operation in an embodiment of the present invention;
FIG. 3 is a schematic diagram of another MEMS gyroscope according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of an electronic device according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of another electronic device according to an embodiment of the present invention;
FIG. 6 is a graph of voltage versus time for a ceramic capacitor vibrating in accordance with an embodiment of the present invention;
FIG. 7 is a waveform diagram of the FFT algorithm analyzing frequency and amplitude in the embodiment of the present invention:
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another electronic device provided in the embodiment of the present invention;
fig. 10 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a MEMS gyroscope according to an embodiment of the present invention, and as shown in fig. 1, a MEMS gyroscope 100 includes:
at least two masses 101;
a data acquisition unit 102 for measuring vibrational deflection data of a mass 101 connected to the data acquisition unit 102;
a connection state switching unit 103 connected to the data acquisition unit 102, and configured to switch a connection state when receiving a control signal, and control the mass block 101 connected to the data acquisition unit 102 to be adjusted from a first mass block to a second mass block;
the control signal is used for indicating that the first mass block resonates and the generated bottom noise meets a preset condition; the second mass block is the mass block 101 except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different.
In the embodiment of the present invention, at least two mass blocks 101 are disposed in the MEMS gyroscope 100, and natural vibration frequencies of at least two mass blocks 101 in the at least two mass blocks 101 are different, when the electronic device provided with the MEMS gyroscope 100 determines that a first mass block connected to the data acquisition unit 102 resonates, and a noise floor generated by the first mass block due to the resonance meets a preset condition, such as: the bottom noise parameter value is greater than or equal to a preset threshold value, and the like, the electronic device may send a control signal to the connection state switching unit 103 to control the connection state switching unit 103 to switch the connection state between the data acquisition unit 102 and the at least two mass blocks 101, so that the mass block connected to the data acquisition unit 102 is switched from the first mass block to the second mass block having a different natural frequency from the first mass block, and thus, the second mass block does not resonate due to the different natural frequencies of the second mass block and the second mass block, thereby preventing the vibration deflection data acquired by the data acquisition unit 102 from having bottom noise, and improving the measurement accuracy of the MEMS gyroscope 100.
Wherein, there are at least two masses 101 in the above-mentioned at least two masses 101 that the natural vibration frequency of two masses 101 is different, for example: the MEMS gyroscope includes a mass 1, a mass 2, and a mass 3, and the natural vibration frequencies of the mass 1 and the mass 2 are the same, while the natural vibration frequency of the mass 3 is different from the natural vibration frequencies of the mass 1 and the mass 2.
In addition, the natural frequencies of the two masses 101 with different natural frequencies of the at least two masses 101 may be different due to different factors such as shape and rigidity. According to the formula of natural vibration frequency and massIt can be seen that one important factor affecting the natural vibration frequency of an object is the mass of the object, where k represents the stiffness of the mass; m represents the mass of the mass block; optionally, the MEMS gyroscope includes two mass blocks 101, the mass of the two mass blocks 101 is different, and the natural vibration frequencies of the two mass blocks can be different by setting the mass of the two mass blocks 101 to be different, so that the structure is simple and easy to implement.
It should be noted that, according to the existing operating principle of the MEMS gyroscope, each mass 101 is composed of two vibrating objects that constantly make reverse motion, for example, if the MEMS gyroscope 100 includes two masses 4 and 5 with different masses, as shown in fig. 2, the mass 4 may be composed of two objects with mass m1, and the two objects with mass m1 vibrate and constantly make reverse motion; and the mass 5 may be composed of two bodies each having a mass m2, and the two bodies each having a mass m1 vibrate and constantly move in opposite directions.
It should be noted that the at least two masses 101 may be disposed in a sensing region of the MEMS gyroscope, and the sensing region may further include a driving component with a comb structure, a sensing component with a shape of a capacitor plate, and the like, and other components of the MEMS gyroscope are well known to those skilled in the art and are not described herein again.
In an embodiment of the present invention, the data acquisition unit 102 may acquire vibration deflection data of the mass block 101 connected thereto, where the vibration deflection data may be a capacitance change value of a lateral capacitive plate in the MEMS gyroscope 100 due to lateral coriolis motion, and the data acquisition unit 102 may analyze an angular velocity of the mass block 101 connected thereto according to the vibration deflection data, so as to determine an action of a user of the electronic device.
The connection state switching unit 103 may switch the mass block connected to the data acquisition unit 102 from the first mass block to the second mass block when receiving the control signal, that is, the data acquisition channel between the first mass block and the data acquisition unit 102 is disconnected, and the data acquisition on-off connection between the second mass block and the data acquisition unit 102 is connected, so that the vibration deflection data acquired by the data acquisition unit 102 is changed from the vibration deflection data of the first mass block to the vibration deflection data of the second mass block.
The connection state switching unit 103 may include a plurality of single-pole single-throw switches connected in parallel, for example: if the MEMS gyroscope 100 includes the mass block 1, the mass block 2, and the mass block 3, the connection state switching unit 103 may include a single-pole single-throw switch 1, a single-pole single-throw switch 2, and a single-pole single-throw switch 3, and one end of the single-pole single-throw switch 1, the single-pole single-throw switch 2, and one end of the single-pole single-throw switch 3 are connected in parallel to the data acquisition unit 102, and the other end of the single-pole single-throw switch 1 is connected to the mass block 1, and the other end of the single-pole single-throw switch 2 is connected to the mass block 2, and the other end of the single-pole single-throw switch 3 is connected to the mass block 3, when the mass block 1 or the mass block 2 is connected to the data acquisition unit 101, if the connection state switching unit 103 receives a control signal, both the single-pole single-throw switch 1.
In addition, if the MEMS gyroscope includes two mass blocks 101, optionally, the connection state switching unit 103 may be a single-pole double-throw switch, an input end of the single-pole double-throw switch is connected to the data acquisition unit 102, a first output end of the single-pole double-throw switch is connected to one mass block 101 of the two mass blocks 101, and a second output end of the single-pole double-throw switch is connected to the other mass block 101 of the two mass blocks 101.
In this embodiment, the electronic device may send a control signal to the single-pole double-throw switch through the data acquisition unit 102, and the single-pole double-throw switch switches and communicates the input terminal and the first output terminal, or the input terminal and the second output terminal, according to the control signal, thereby realizing switching of the connection state between the two mass blocks 101 and the data acquisition unit 102, making the structure simple and the switching operation fast, and improving the response efficiency of connection state switching.
It should be noted that the electronic device may send a control signal to the connection state switching unit 103, may send the control signal to the connection state switching unit 103 through the data acquisition unit 102, or the connection state switching unit 103 is provided with a control signal input end, the control signal input end is connected to a control signal output end in the electronic device, and the electronic device directly outputs the control signal to the connection state switching unit 103, which is not limited herein.
The MEMS gyroscope comprises at least two mass blocks; the data acquisition unit is used for measuring the vibration deflection data of the mass block connected with the data acquisition unit; the connection state switching unit is connected with the data acquisition unit and used for switching the connection state when receiving a control signal indicating that the first mass block resonates and the generated bottom noise meets a preset condition, and controlling the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block; the first mass block is connected with the data acquisition unit in the two mass blocks; the second mass block is the mass block except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different. Therefore, when the mass block for acquiring the vibration deflection data in the MEMS gyroscope resonates and the generated noise meets the preset condition, the mass block with another different frequency can be switched to acquire the vibration deflection data, so that the acquired vibration deflection data is prevented from having noise, and the measurement accuracy is improved.
Based on the MEMS gyroscope 100, an embodiment of the present invention further provides an electronic device, which includes the MEMS gyroscope 100.
Since the structure of the MEMS gyroscope 100 is described in the above embodiments, and other structures of the electronic device are well known to those skilled in the art, detailed descriptions of the specific structure of the electronic device are omitted.
In an embodiment of the present invention, the electronic device may be any electronic device provided with a MEMS gyroscope, for example: mobile terminals such as Mobile phones, Tablet Personal computers (Tablet Personal computers), Laptop computers (Laptop computers), Personal Digital Assistants (PDAs), Mobile Internet Devices (MIDs) or Wearable devices (Wearable devices), and electronic books and cameras.
Referring to fig. 4, fig. 4 is a flowchart illustrating a control method of an electronic device according to an embodiment of the present invention, applied to the electronic device, as shown in fig. 4, including the following steps:
step 401, noise associated data of a first mass block in a MEMS gyroscope is obtained.
In the embodiment of the present invention, the electronic device may measure the value of the ground noise parameter when the first mass block in the MEMS gyroscope 100 vibrates through the ground noise measurement component provided therein, and use the measured value of the ground noise parameter as the noise-related data.
Step 402, according to the noise associated data, judging whether the first mass block resonates and whether the generated bottom noise meets a preset condition.
In the embodiment of the present invention, if the noise-related data is obtained in step 601, the electronic device may determine, according to the noise-related data, whether the first mass block resonates and whether the generated bottom noise meets a preset condition, for example: and if the noise associated data is the background noise parameter value, when the measured background noise parameter value is greater than or equal to a preset background noise parameter threshold value, determining that the first mass block resonates and the background noise meets a preset condition.
And 403, if it is determined that the first mass block resonates and the bottom noise meets a preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block.
In the embodiment of the present invention, if it is determined in step 602 that the first mass block resonates and the bottom noise meets the preset condition, the electronic device determines that the generated bottom noise affects the measurement accuracy of the MEMS gyroscope 100, and the electronic device may send a control signal to the connection state switching unit in the MEMS gyroscope through the processor of the electronic device, so as to control the mass block connected to the data acquisition unit to be adjusted from the first mass block to the second mass block, thereby avoiding the occurrence of noise in the acquired vibration deflection data and improving the measurement accuracy.
According to the control method of the electronic equipment, noise associated data of a first mass block in the MEMS gyroscope are obtained; judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data; and if the first mass block is determined to resonate and the bottom noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block. Therefore, the electronic equipment can switch the mass block for collecting the vibration deflection data in the MEMS gyroscope, so that the collected vibration deflection data is prevented from having noise, and the measurement accuracy is improved.
Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of an electronic device according to an embodiment of the present invention, applied to the electronic device, and shown in fig. 5, including the following steps:
and 501, acquiring vibration deflection data of the first mass block acquired by the data acquisition unit.
In an embodiment of the present invention, the electronic device may acquire the vibration deflection data of the first mass block acquired by the data acquisition unit 102, where the first mass block is a mass block connected to the data acquisition unit 102.
Step 502, obtaining an amplitude voltage corresponding to the vibration deflection data, and determining whether the amplitude voltage is greater than or equal to a preset amplitude threshold.
In the embodiment of the present invention, since the mass of each mass block 101 in the MEMS gyroscope is fixed, the electronic device may store the natural frequency of each mass block 101 in advance according to the relationship between the mass and the natural frequency, and if the vibration deflection data of the first mass block is obtained in step 501, the amplitude voltage of the first mass block near the natural frequency may be obtained through a certain algorithm, such as Fast Fourier Transform (FFT) algorithm, and the amplitude voltage is a voltage value, and it is determined whether the amplitude voltage is greater than or equal to a preset amplitude threshold.
Step 503, if the amplitude voltage is greater than or equal to the preset amplitude threshold, it is determined that the first mass block resonates and the noise floor meets a preset condition.
In this embodiment of the present invention, if it is determined in step 503 that the amplitude voltage is greater than or equal to the preset amplitude threshold, the electronic device may determine that the first mass block resonates and the noise floor meets the preset condition.
Step 504, if it is determined that the first mass block resonates and the noise floor meets a preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block.
In the embodiment of the present invention, if it is determined in step 503 that the first mass block resonates and the noise floor meets the preset condition, the electronic device may send a control signal to the connection state switching unit in the MEMS gyroscope through the processor of the electronic device, and control the mass block connected to the data acquisition unit to be adjusted from the first mass block to the second mass block, so as to avoid noise in the acquired vibration deflection data and improve the measurement accuracy.
For example: assuming that the natural vibration frequency of the first mass block is 1300Hz and the preset amplitude threshold is 0.005V, and the electronic device analyzes a waveform diagram between voltage and time when the ceramic capacitor vibrates, as shown in fig. 6, it is determined that the vibration frequency of the ceramic capacitor inside the electronic device is also 1300Hz, and the electronic device analyzes vibration deflection data of the first mass block through an FFT algorithm to obtain a waveform diagram between the vibration frequency and the amplitude voltage, as shown in fig. 7, and the amplitude voltage of the first mass block at 1300Hz is 0.01V, and the obtained amplitude voltage is greater than the preset amplitude threshold, the processor sends a control signal to the connection state switching unit 103 to control the mass block connected with the data acquisition unit 102 to be switched from the first mass block to the second mass block, so that the vibration frequency of 1300Hz is avoided.
According to the control method of the electronic equipment, the vibration deflection data of the first mass block collected by the data collection unit are obtained, the amplitude voltage corresponding to the vibration deflection data is obtained, and whether the amplitude voltage is larger than or equal to the preset amplitude threshold value or not is judged; if the amplitude voltage is larger than or equal to the preset amplitude threshold value, the first mass block is determined to resonate, and the noise floor meets the preset condition, so that the energy consumption of the electronic equipment in the measuring process can be reduced, and the measurement is more accurate.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 8, an electronic device 800 includes:
a data obtaining module 801, configured to obtain noise related data of a first mass block in the MEMS gyroscope;
a determining module 802, configured to determine whether the first mass block resonates and whether a generated noise floor meets a preset condition according to the noise-related data;
and a control module 803, configured to send a control signal to a connection state switching unit in the MEMS gyroscope to control the mass block connected to the data acquisition unit to be adjusted from the first mass block to a second mass block if it is determined that the first mass block resonates and the noise floor meets a preset condition.
Optionally, as shown in fig. 9, the data obtaining module 801 is further configured to obtain vibration deflection data of the first mass block, which is collected by the data collecting unit;
the determining module 802 includes:
a judging unit 8021, configured to obtain an amplitude voltage corresponding to the vibration deflection data, and judge whether the amplitude voltage is greater than or equal to a preset amplitude threshold;
the determining unit 8022 is configured to determine that the first mass block resonates and the noise floor meets a preset condition if the amplitude voltage is greater than or equal to the preset amplitude threshold.
The electronic device 800 can implement each process implemented by the electronic device in the method embodiments of fig. 4 and fig. 5, and details are not repeated here to avoid repetition.
In the electronic device 800 according to the embodiment of the present invention, noise-related data of the first mass block in the MEMS gyroscope is acquired; judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data; and if the first mass block is determined to resonate and the bottom noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block. Therefore, the electronic equipment can switch the mass block for collecting the vibration deflection data in the MEMS gyroscope, so that the collected vibration deflection data is prevented from having noise, and the measurement accuracy is improved.
Fig. 10 is a schematic diagram of a hardware structure of an electronic device for implementing various embodiments of the present invention, where the electronic device 1000 includes, but is not limited to: the MEMS gyroscope 100 includes a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, a power source 1011, and the display unit 1006 is a flexible screen that can be bent. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 10 does not constitute a limitation of the electronic device, and that the electronic device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
The processor 1010 is configured to acquire noise related data of a first mass block in the MEMS gyroscope; judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data; and if the first mass block is determined to resonate and the background noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted into a second mass block from the first mass block.
Optionally, the processor 1010 is further configured to: acquiring vibration deflection data of a first mass block acquired by a data acquisition unit; acquiring amplitude voltage corresponding to the vibration deflection data, and judging whether the amplitude voltage is greater than or equal to a preset amplitude threshold value; and if the amplitude voltage is greater than or equal to the preset amplitude threshold value, determining that the first mass block resonates and the background noise meets a preset condition.
The electronic device 1000 can implement the processes implemented by the electronic device in the foregoing embodiments, and in order to avoid repetition, the details are not described here.
According to the electronic device 1000 of the embodiment of the invention, noise associated data of the first mass block in the MEMS gyroscope is acquired; judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data; and if the first mass block is determined to resonate and the bottom noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to a second mass block. Therefore, the electronic equipment can switch the mass block for collecting the vibration deflection data in the MEMS gyroscope, so that the collected vibration deflection data is prevented from having noise, and the measurement accuracy is improved.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 1001 may be used for receiving and sending signals during a message transmission or a call, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 1010; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 1001 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. Further, the radio frequency unit 1001 may also communicate with a network and other devices through a wireless communication system.
The electronic device provides wireless broadband internet access to the user through the network module 1002, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.
The audio output unit 1003 may convert audio data received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into an audio signal and output as sound. Also, the audio output unit 1003 may also provide audio output related to a specific function performed by the electronic apparatus 1000 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 1003 includes a speaker, a buzzer, a receiver, and the like.
The input unit 1004 is used to receive an audio or video signal. The input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, the Graphics processor 10041 Processing image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 1006. The image frames processed by the graphic processor 10041 may be stored in the memory 1009 (or other storage medium) or transmitted via the radio frequency unit 1001 or the network module 1002. The microphone 10042 can receive sound and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 1001 in case of a phone call mode.
The electronic device 1000 also includes at least one sensor 1005, 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 10061 according to the brightness of ambient light and a proximity sensor that can turn off the display panel 10061 and/or the backlight when the electronic device 1000 moves to the ear. As one type of motion sensor, an 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 to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 1005 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.
The display unit 1006 is used to display information input by the user or information provided to the user. The Display unit 1006 may include a Display panel 10061, and the Display panel 10061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 1007 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 10071 (e.g., operations by a user on or near the touch panel 10071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 10071 can include two portions, a touch detection device and a touch processor. 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 processor; the touch processor receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 1010, and receives and executes commands sent by the processor 1010. In addition, the touch panel 10071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 10071, the user input unit 1007 can include other input devices 10072. Specifically, the other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 10071 can be overlaid on the display panel 10061, and when the touch panel 10071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1010 to determine the type of the touch event, and then the processor 1010 provides a corresponding visual output on the display panel 10061 according to the type of the touch event. Although in fig. 10, the touch panel 10071 and the display panel 10061 are two independent components for implementing the input and output functions of the electronic device, in some embodiments, the touch panel 10071 and the display panel 10061 may be integrated to implement the input and output functions of the electronic device, and the implementation is not limited herein.
The interface unit 1008 is an interface for connecting an external device to the electronic apparatus 1000. 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 1008 may be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within the electronic device 1000 or may be used to transmit data between the electronic device 1000 and the external devices.
The memory 1009 may be used to store software programs as well as various data. The memory 1009 may mainly include a program storage area and a data storage area, wherein the program storage 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, and the like), 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 1009 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 1010 is a control center of the electronic device, connects various parts of the entire electronic device using various interfaces and lines, and performs various functions of the electronic device and processes data by operating or executing software programs and/or modules stored in the memory 1009 and calling data stored in the memory 1009, thereby integrally monitoring the electronic device. Processor 1010 may include one or more processing units; preferably, the processor 1010 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 processor 1010.
The electronic device 1000 may further include a power source 1011 (e.g., a battery) for supplying power to various components, and preferably, the power source 1011 may be logically connected to the processor 1010 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system.
In addition, the electronic device 1000 includes some functional modules that are not shown, and are not described in detail herein.
Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor 1010, a memory 1009, and a computer program stored in the memory 1009 and capable of running on the processor 1010, where the computer program is executed by the processor 1010 to implement each process of the control method embodiment of the electronic device, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the control method embodiment of the electronic device, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
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.
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 (9)
1. A MEMS gyroscope, comprising:
at least two mass blocks;
the data acquisition unit is used for measuring the vibration deflection data of the mass block connected with the data acquisition unit;
the connection state switching unit is connected with the data acquisition unit and used for switching the connection state when receiving a control signal and controlling the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block;
the control signal is used for indicating that the first mass block resonates and the generated bottom noise meets a preset condition; the second mass block is the mass block except the first mass block in the two mass blocks; and the natural vibration frequencies of the first mass and the second mass are different.
2. The MEMS gyroscope of claim 1, wherein the MEMS gyroscope comprises two masses, and the masses of the two masses are different.
3. The MEMS gyroscope of claim 2, wherein the connection state switching unit is a single-pole double-throw switch, an input terminal of the single-pole double-throw switch is connected to the data acquisition unit, a first output terminal is connected to one of the two masses, and a second output terminal is connected to the other of the two masses.
4. An electronic device, characterized in that it comprises a MEMS gyroscope according to any of claims 1 to 3.
5. A control method of an electronic device, applied to the electronic device of claim 4, the method comprising:
acquiring noise related data of a first mass block in the MEMS gyroscope;
judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data;
and if the first mass block is determined to resonate and the background noise meets the preset condition, sending a control signal to a connection state switching unit in the MEMS gyroscope so as to control the mass block connected with the data acquisition unit to be adjusted into a second mass block from the first mass block.
6. The method of claim 5, wherein the step of obtaining noise related data of the first mass in the MEMS gyroscope comprises:
acquiring vibration deflection data of a first mass block acquired by a data acquisition unit;
the step of judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data comprises the following steps of:
acquiring amplitude voltage corresponding to the vibration deflection data, and judging whether the amplitude voltage is greater than or equal to a preset amplitude threshold value or not, wherein the amplitude voltage is the amplitude voltage at the natural vibration frequency of the first mass block;
and if the amplitude voltage is greater than or equal to the preset amplitude threshold value, determining that the first mass block resonates and the background noise meets a preset condition.
7. An electronic device, comprising:
the data acquisition module is used for acquiring noise related data of a first mass block in the MEMS gyroscope;
the judging module is used for judging whether the first mass block resonates or not and whether the generated bottom noise meets a preset condition or not according to the noise associated data;
and the control module is used for sending a control signal to a connection state switching unit in the MEMS gyroscope to control the mass block connected with the data acquisition unit to be adjusted from the first mass block to the second mass block if the first mass block is determined to resonate and the bottom noise meets a preset condition.
8. The electronic device of claim 7, wherein the data acquisition module is further configured to acquire vibration deflection data of the first mass acquired by the data acquisition unit;
the judging module comprises:
the judging unit is used for acquiring amplitude voltage corresponding to the vibration deflection data and judging whether the amplitude voltage is greater than or equal to a preset amplitude threshold value or not, wherein the amplitude voltage is the amplitude voltage at the natural vibration frequency of the first mass block;
and the determining unit is used for determining that the first mass block resonates and the background noise meets a preset condition if the amplitude voltage is greater than or equal to the preset amplitude threshold.
9. An electronic device, characterized in that it comprises a processor, a memory and a computer program stored on said memory and executable on said processor, said computer program, when executed by said processor, implementing the steps of the control method of an electronic device according to claim 5 or 6.
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| US6301965B1 (en) * | 1999-12-14 | 2001-10-16 | Sandia Corporation | Microelectromechanical accelerometer with resonance-cancelling control circuit including an idle state |
| FR2858854B1 (en) * | 2003-08-13 | 2005-12-16 | Sercel Rech Const Elect | ACCELEROMETER WITH VIBRATION PARASITES REDUCED BY IMPROVED REMINDER |
| JP2009162645A (en) * | 2008-01-08 | 2009-07-23 | Panasonic Corp | Inertial velocity sensor signal processing circuit and inertial velocity sensor device having the same |
| IT1392741B1 (en) * | 2008-12-23 | 2012-03-16 | St Microelectronics Rousset | MICROELETTROMECHANICAL GYROSCOPE WITH IMPROVED REJECTION OF ACCELERATION DISORDERS |
| CN103675345B (en) * | 2012-09-21 | 2017-12-01 | 中国科学院地质与地球物理研究所 | A kind of accelerometer and its manufacturing process |
| KR20170055329A (en) * | 2015-11-11 | 2017-05-19 | 삼성전자주식회사 | Method for noise cancelling and electronic device therefor |
| US10119834B2 (en) * | 2015-12-10 | 2018-11-06 | Panasonic Corporation | MEMS sensor with voltage sensing of movable mass |
| US20180031603A1 (en) * | 2016-07-27 | 2018-02-01 | Lumedyne Technologies Incorporated | Systems and methods for detecting inertial parameters using a vibratory accelerometer with multiple degrees of freedom |
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