CN112649777B - Dynamic calibration method, device and computer readable storage medium - Google Patents
Dynamic calibration method, device and computer readable storage medium Download PDFInfo
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- CN112649777B CN112649777B CN202011354229.7A CN202011354229A CN112649777B CN 112649777 B CN112649777 B CN 112649777B CN 202011354229 A CN202011354229 A CN 202011354229A CN 112649777 B CN112649777 B CN 112649777B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Abstract
The invention discloses a dynamic calibration method, a device and a computer readable storage medium, wherein the method comprises the following steps: recognizing that when the frequency band switching is detected, detecting a parasitic capacitance value inside the capacitive sensor and an antenna parasitic capacitance value; then, comparing the parasitic capacitance value with the antenna parasitic capacitance value; when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value; when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value. The influence of the antenna parasitic capacitance on the SAR sensor parasitic capacitance is reduced when the antenna frequency is switched, so that the SAR sensor is ensured to work in a normal state.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a dynamic calibration method, device, and computer readable storage medium.
Background
In the prior art, with the continuous development of intelligent terminal equipment, 5G and WiFi6 technologies are used in mobile phones at present, the radio frequency transmission power of antennas using these new technologies needs to be increased, and after the transmission power is increased, the generated electromagnetic waves generate an induction electromagnetic field in a human body under the action of an external electromagnetic field. Since various organs of the human body are lossy media, an electromagnetic field in the body will generate a current, which causes Absorption and dissipation of electromagnetic energy, and SAR (Specific Absorption Rate) is commonly used in biological dosimetry to characterize this physical process. The higher the SAR value of a mobile phone is, the higher the radiation damage to a human body is, so that the mobile phone has own standard at home and abroad, in order to achieve the standard of the SAR value at home and abroad, the antenna power needs to be controlled, the control antenna needs to judge according to the state of the SAR sensor, but the different radio frequency bands need to calibrate the initial values of the SAR sensors in different frequency bands, otherwise, the SAR sensors work abnormally due to the frequency band difference.
With respect to the operating principle of the SAR sensor, the self-capacitance sensing technology detects a change in capacitance of the touch or proximity sensor when a target object is in proximity to the sensor. The target object may be a human finger, a face or any conductive object. When an object approaches the sensor, a Capacitance (CPARX) is generated through a peripheral electric field, the sensor judges the approaching degree of the object according to the comparison of the capacitance (CPARA, CPARX), and when the approaching degree reaches an algorithm set threshold value, the sensor triggers and interrupts the object and reports the object to the system.
In the prior art, can know through above-mentioned theory of operation that CPARA (parasitic capacitance) is not fixed, can change along with the change of peripheral electric field environment, lug connection antenna (RF) during TUNER control of SAR sensor, so the electric field change of SAR sensor can be influenced in the switching of antenna frequency, in addition because SAR sensor and the direct connection of antenna, the parasitic capacitance of antenna is offset to the electric capacity (resistance capacitance) that only has a 33pf in the middle, resistance capacitance can't satisfy the requirement when antenna frequency switches, can lead to antenna parasitic capacitance to influence SAR sensor parasitic capacitance, thereby make SAR sensor's working reference value inaccurate, influence its normal work.
Disclosure of Invention
In order to solve the technical defects in the prior art, the invention provides a dynamic calibration method, which comprises the following steps:
when the frequency band switching is detected, detecting a parasitic capacitance value inside the capacitance sensor and an antenna parasitic capacitance value;
comparing the parasitic capacitance value with the antenna parasitic capacitance value;
when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value;
when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value.
Optionally, the detecting, when the frequency band switching is detected, a parasitic capacitance value inside the capacitive sensor and an antenna parasitic capacitance value includes:
monitoring whether the channel of the antenna is switched;
and detecting the current channel when the channel of the antenna is switched.
Optionally, when detecting a frequency band switch, the method further includes:
judging whether to switch frequency bands according to the detected frequency channels;
and if the frequency band switching is judged not to be carried out, waiting for the next channel detection.
Optionally, when detecting a frequency band switch, the method further includes:
if the frequency band switching is judged to be carried out, acquiring a switched current antenna frequency band;
and carrying out calibration initialization by combining the capacitive sensor with the current antenna frequency band.
Optionally, the taking the parasitic capacitance value as an operation reference value when the parasitic capacitance value is the same as the antenna parasitic capacitance value includes:
keeping the current parasitic capacitance value as the working reference value;
and circularly monitoring whether the channel of the antenna is switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
Optionally, when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking a sum of the parasitic capacitance value and the difference value as the operation reference value includes:
taking the sum of the parasitic capacitance value and the difference value as the working reference value;
and circularly monitoring whether the channel of the antenna is switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
Optionally, before detecting the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna when the frequency band switching is detected, the method includes:
monitoring whether the channel of the antenna is switched;
when the channel of the antenna is switched, the stray capacitance generated by the antenna is offset through the offset capacitance between the capacitance sensor and the antenna.
Optionally, before detecting the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna when the frequency band switching is detected, the method further includes:
monitoring whether the channel of the antenna is switched;
when the channel of the antenna is switched, the stray capacitance generated by the antenna is counteracted through the offset capacitance between the capacitance sensor and the antenna and the ground inductance.
The invention also provides dynamic calibration equipment, which comprises a dynamic calibration circuit, wherein the dynamic calibration circuit comprises an inductance to ground, which is used for eliminating the influence of the controller working in different channels and is arranged between the capacitor and the grounding end;
the apparatus further comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the dynamic calibration method as defined in any one of the above.
The present invention further proposes a computer-readable storage medium having stored thereon a dynamic calibration program, which when executed by a processor implements the steps of the dynamic calibration method as described in any one of the above.
By implementing the dynamic calibration method, the device and the computer readable storage medium, when the frequency band switching is detected, the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna are detected; then, comparing the parasitic capacitance value with the antenna parasitic capacitance value; when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value; when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value. The influence of the antenna parasitic capacitance on the SAR sensor parasitic capacitance is reduced when the antenna frequency is switched, so that the SAR sensor is ensured to work in a normal state.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a hardware structure of a mobile terminal according to the present invention;
fig. 2 is a communication network system architecture diagram provided by an embodiment of the present invention;
FIG. 3 is a flow chart of a first embodiment of a dynamic calibration method of the present invention;
fig. 4 is a circuit diagram of a first embodiment of the dynamic calibration method of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "part", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and have no particular meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and fixed terminals such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an a/V (audio/video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000 ), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the Graphics processor 1041 processes image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of the phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the gesture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation on or near the touch panel, the touch panel is transmitted to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, etc. Further, memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby integrally monitoring the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an e-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an epc (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.
Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.
The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 with access to the EPC 203.
The EPC203 may include an MME (Mobility Management Entity) 2031, an hss (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a pgw (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node for processing signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide some registers to manage functions such as home location register (not shown) and holds some user-specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address allocation and other functions for UE201, PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for policy and charging enforcement function (not shown).
Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.
Based on the hardware structure of the mobile terminal and the communication network system, the embodiments of the method of the invention are provided.
Example one
FIG. 3 is a flow chart of a first embodiment of the dynamic calibration method of the present invention. A method of dynamic calibration, the method comprising:
s1, when frequency band switching is detected, detecting a parasitic capacitance value inside a capacitive sensor and an antenna parasitic capacitance value;
s2, comparing the parasitic capacitance value with the antenna parasitic capacitance value;
s3, when the parasitic capacitance value is the same as the parasitic capacitance value of the antenna, taking the parasitic capacitance value as a working reference value;
and S4, when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value.
Specifically, in this embodiment, first, when a frequency band switching is detected, a parasitic capacitance value inside the capacitance sensor and an antenna parasitic capacitance value are detected; then, comparing the parasitic capacitance value with the antenna parasitic capacitance value; when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value; when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value.
In this embodiment, considering that CPARA (parasitic capacitance) is not fixed and may change with changes of the surrounding electric field environment, an antenna (RF) is directly connected during TUNER control of the SAR sensor, so switching of the antenna frequency may affect electric field changes of the SAR sensor, in addition, because the SAR sensor is directly connected to the antenna, only one 33pf capacitance (that is, a resistance capacitance) is in the middle to offset the parasitic capacitance of the antenna, and the resistance capacitance cannot meet requirements when the antenna frequency is switched, which may cause the parasitic capacitance of the antenna to affect the parasitic capacitance of the SAR sensor, in order to reduce this application, this embodiment performs corresponding processing for hardware:
firstly, aiming at a large-mainboard SAR calibration processing scheme, after TUNER (controller) is isolated by 33pF capacitor through experimental study, a ground inductance is needed to eliminate the influence of TUNER working in different channels on a large-mainboard in order to process the parasitic capacitance change caused by switching channels of the antenna, the hardware connection mode can refer to FIG. 4, the circuit comprises an SAR sensor connection end, a resistance capacitor and an antenna which are connected with the SAR sensor connection end, a controller which is connected with the resistance capacitor, and a ground inductance which is connected with the controller and the resistance capacitor, wherein, the circle part is the added ground inductance and is used for offsetting the parasitic capacitance generated by the antenna, thereby the parasitic capacitance of the SAR sensor can not be interfered by the antenna;
then, aiming at the small mainboard SAR calibration processing scheme, the inductance can not be added due to the limited design space of the small mainboard, so that dynamic calibration can be carried out only through a driving program, the parasitic capacitance of the SAR sensor under each antenna frequency band can be ensured to set a new capacitance value according to the current antenna parasitic capacitance, and the SAR sensor can normally detect whether an object is close to the SAR sensor or not, and the algorithm flow is as follows: firstly, when the frequency band switching is detected, detecting a parasitic capacitance value inside a capacitance sensor and an antenna parasitic capacitance value; then, comparing the parasitic capacitance value with the antenna parasitic capacitance value; when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value; when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value.
The method has the advantages that when the frequency band switching is detected, the parasitic capacitance value inside the capacitance sensor and the antenna parasitic capacitance value are detected through recognition; then, comparing the parasitic capacitance value with the antenna parasitic capacitance value; when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value; when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value. When the antenna frequency is switched, the influence of the antenna parasitic capacitance on the SAR sensor parasitic capacitance is reduced, so that the SAR sensor is ensured to work in a normal state.
Example two
Based on the foregoing embodiment, optionally, the detecting a parasitic capacitance value inside the capacitive sensor and an antenna parasitic capacitance value when the frequency band switching is detected includes:
monitoring whether the channel of the antenna is switched;
and detecting the current channel when the channel of the antenna is switched.
Optionally, when the frequency band switching is detected, detecting a parasitic capacitance value inside the capacitive sensor and an antenna parasitic capacitance value, further includes:
judging whether to switch frequency bands according to the detected frequency channels;
and if the frequency band switching is judged not to be carried out, waiting for the next channel detection.
Optionally, when the frequency band switching is detected, detecting a parasitic capacitance value inside the capacitive sensor and an antenna parasitic capacitance value, further includes:
if the frequency band switching is judged to be carried out, acquiring a switched current antenna frequency band;
and calibrating and initializing by combining the capacitive sensor with the current antenna frequency band.
Optionally, the taking the parasitic capacitance value as an operation reference value when the parasitic capacitance value is the same as the antenna parasitic capacitance value includes:
keeping the current parasitic capacitance value as the working reference value;
and circularly monitoring whether the channels of the antenna are switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
Optionally, when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking a sum of the parasitic capacitance value and the difference value as the operation reference value includes:
taking the sum of the current parasitic capacitance value and the difference value as the working reference value;
and circularly monitoring whether the channel of the antenna is switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
Optionally, before detecting the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna when the frequency band switching is detected, the method includes:
monitoring whether the channel of the antenna is switched;
when the channel of the antenna is switched, the stray capacitance generated by the antenna is offset through the offset capacitance between the capacitance sensor and the antenna.
Optionally, before detecting the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna when the frequency band switching is detected, the method further includes:
monitoring whether the channel of the antenna is switched;
when the frequency channel of the antenna is switched, the parasitic capacitance generated by the antenna is counteracted through the offset capacitance and the ground inductance between the capacitance sensor and the antenna.
EXAMPLE III
Based on the above embodiment, the present invention further provides a dynamic calibration device, which includes a dynamic calibration circuit, where the dynamic calibration circuit includes a ground inductor configured to eliminate the influence of the controller working in different channels and disposed between the offset capacitor and the ground terminal;
the apparatus further comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the dynamic calibration method as defined in any one of the above.
It should be noted that the apparatus embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment, and technical features in the method embodiment are applicable in the apparatus embodiment, which is not described herein again.
Example four
Based on the foregoing embodiments, the present invention further provides a computer-readable storage medium, having a dynamic calibration program stored thereon, where the dynamic calibration program, when executed by a processor, implements the steps of the dynamic calibration method as described in any one of the foregoing.
It should be noted that the media embodiment and the method embodiment belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment, and technical features in the method embodiment are applicable to the media embodiment, which is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A dynamic calibration method, the method comprising:
when the frequency band switching is detected, detecting a parasitic capacitance value inside the capacitance sensor and an antenna parasitic capacitance value;
comparing the parasitic capacitance value with the antenna parasitic capacitance value;
when the parasitic capacitance value is the same as the antenna parasitic capacitance value, taking the parasitic capacitance value as a working reference value;
when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and taking the sum of the parasitic capacitance value and the difference value as the working reference value.
2. The dynamic calibration method according to claim 1, wherein the detecting the parasitic capacitance value inside the capacitive sensor and the antenna parasitic capacitance value when the frequency band switching is detected comprises:
monitoring whether the channel of the antenna is switched;
and detecting the current channel when the channel of the antenna is switched.
3. The dynamic calibration method according to claim 2, wherein when the frequency band switching is detected, detecting a parasitic capacitance value inside a capacitive sensor and an antenna parasitic capacitance value, further comprises:
judging whether to switch frequency bands according to the detected frequency channels;
and if the frequency band switching is judged not to be carried out, waiting for the next channel detection.
4. The dynamic calibration method according to claim 3, wherein when the frequency band switching is detected, detecting parasitic capacitance values inside the capacitive sensor and antenna parasitic capacitance values, further comprises:
if the frequency band switching is judged to be carried out, acquiring the switched current antenna frequency band;
and calibrating and initializing by combining the capacitive sensor with the current antenna frequency band.
5. The dynamic calibration method according to claim 4, wherein the step of using the parasitic capacitance value as an operation reference value when the parasitic capacitance value is the same as the antenna parasitic capacitance value comprises:
keeping the current parasitic capacitance value as the working reference value;
and circularly monitoring whether the channels of the antenna are switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
6. The dynamic calibration method according to claim 5, wherein when the parasitic capacitance value is different from the antenna parasitic capacitance value, obtaining a difference value between the parasitic capacitance value and the antenna parasitic capacitance value, and using a sum of the parasitic capacitance value and the difference value as the operation reference value comprises:
taking the sum of the parasitic capacitance value and the difference value as the working reference value;
and circularly monitoring whether the channel of the antenna is switched or not, and determining whether to perform the calibration initialization or not according to the switching state.
7. The dynamic calibration method according to claim 6, wherein before detecting the parasitic capacitance value inside the capacitive sensor and the parasitic capacitance value of the antenna when the frequency band switching is detected, the method comprises:
monitoring whether the channel of the antenna is switched;
when the channel of the antenna is switched, the stray capacitance generated by the antenna is offset through the offset capacitance between the capacitance sensor and the antenna.
8. The dynamic calibration method according to claim 7, wherein before detecting the parasitic capacitance value inside the capacitive sensor and the antenna parasitic capacitance value when the frequency band switching is detected, the method further comprises:
monitoring whether the channel of the antenna is switched;
when the frequency channel of the antenna is switched, the parasitic capacitance generated by the antenna is counteracted through the offset capacitance and the ground inductance between the capacitance sensor and the antenna.
9. The dynamic calibration equipment is characterized by comprising a dynamic calibration circuit, a static calibration circuit and a dynamic calibration circuit, wherein the dynamic calibration circuit comprises an inductance to ground which is used for eliminating the influence of different channels when a controller works and is arranged between a capacitor and a grounding terminal;
the apparatus further comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the dynamic calibration method as claimed in any one of claims 1 to 8.
10. A computer-readable storage medium, having a dynamic calibration program stored thereon, which when executed by a processor implements the steps of the dynamic calibration method of any one of claims 1 to 8.
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