CN106293006B - Method and device for operating magnetic sensor calibration algorithm library and mobile terminal - Google Patents

Abstract

The invention discloses a method and a device for operating a magnetic sensor calibration algorithm library and a mobile terminal. The method comprises the following steps: when detecting that the application program of the magnetic sensor is started, acquiring the GPS signal intensity; and when the GPS signal intensity is not less than a preset threshold value, operating a magnetic sensor calibration algorithm library to calibrate the magnetic sensor. The invention can accurately control the operation of the magnetic sensor calibration algorithm library, and does not need to operate the magnetic sensor calibration algorithm library all the time to carry out meaningless calibration, thereby reducing the power consumption of the mobile terminal.

Description

Method, device and mobile terminal for running magnetic sensor calibration algorithm library

technical field

Embodiments of the present invention relate to measurement technology, and in particular, to a method, device and mobile terminal for running a magnetic sensor calibration algorithm library.

Background technique

In mobile terminals, navigation software is used more and more frequently, such as Baidu Maps, AutoNavi and so on. When the user opens the navigation software, they will see an arrow indicating the current position and the direction to go. This direction is calculated by reading the data of the magnetic sensor, that is, the direction of the compass is obtained from the data of the magnetic sensor, and the direction of the arrow is obtained by calculating the angle between the direction of the compass and the direction of the mobile terminal.

Since magnetic sensors are always susceptible to interference, they often need to be calibrated before they can provide an accurate direction with little deviation. In the prior art, the calibration work is done in the background through the magnetic sensor calibration algorithm library, and the acceleration sensor, gyroscope, magnetic sensor, etc. need to be turned on to calibrate the magnetic sensor. However, in many scenarios, due to the strong interference of the magnetic sensor. And in a changing environment, the calibration of the magnetic sensor is meaningless, resulting in a large power consumption of the mobile terminal.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present invention provide a method, an apparatus, and a mobile terminal for running a magnetic sensor calibration algorithm library, so as to reduce the power consumption of the mobile terminal.

In a first aspect, an embodiment of the present invention provides a method for running a magnetic sensor calibration algorithm library, the method comprising:

Get the GPS signal strength when the app that detects the magnetic sensor is open;

When the GPS signal strength is not less than a preset threshold, the magnetic sensor calibration algorithm library is run to calibrate the magnetic sensor.

In a second aspect, an embodiment of the present invention further provides a device for running a magnetic sensor calibration algorithm library, the device comprising:

The GPS signal strength acquisition module is used to obtain the GPS signal strength when the application program that detects the magnetic sensor is opened;

A magnetic sensor calibration module, configured to run a magnetic sensor calibration algorithm library to calibrate the magnetic sensor when the GPS signal strength is not less than a preset threshold.

In a third aspect, an embodiment of the present invention further provides a mobile terminal, where the mobile terminal integrates the apparatus for running a magnetic sensor calibration algorithm library according to any embodiment of the present invention.

According to the technical solution of the embodiment of the present invention, when it is detected that the application program of the magnetic sensor is opened, the GPS signal strength is obtained, and when the GPS signal strength is not less than a preset threshold, the magnetic sensor calibration algorithm library is run to calibrate the magnetic sensor, The operation of the magnetic sensor calibration algorithm library can be accurately controlled, and there is no need to run the magnetic sensor calibration algorithm library all the time for meaningless calibration, thereby reducing the power consumption of the mobile terminal.

Description of drawings

FIG. 1 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided by Embodiment 1 of the present invention;

2 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided in Embodiment 2 of the present invention;

3 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided by Embodiment 3 of the present invention;

4 is a schematic structural diagram of a device for running a magnetic sensor calibration algorithm library provided in Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all of the contents related to the present invention.

Example 1

FIG. 1 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided in Embodiment 1 of the present invention. This embodiment is applicable to the case of running the magnetic sensor calibration algorithm library according to the GPS signal strength. The method can be executed by running the magnetic sensor. The device for calibrating the algorithm library is executed. The device for running the magnetic sensor calibration algorithm library can be configured in a mobile terminal such as a mobile phone or a tablet computer. The method specifically includes the following steps:

Step 110, when it is detected that the application program of the magnetic sensor is started, the GPS signal strength is obtained.

The application program of the magnetic sensor refers to an application program that needs to call the data of the magnetic sensor. The application of the magnetic sensor preferably includes a map application or a compass application. Among them, the map application needs to calculate the direction to go according to the data of the magnetic sensor, and the compass application needs to calculate the direction of the compass according to the data of the magnetic sensor.

Real-time detection of whether the application of the magnetic sensor is turned on, when it is detected that the application of the magnetic sensor is turned on, obtain the signal strength of GPS (Global Positioning System, Global Positioning System) to exclude the mobile terminal being in a building, tunnel, subway, etc. In the environment with strong interference, the calibration of the magnetic sensor is meaningless in these environments, and the power consumption of the mobile terminal is also increased.

Step 120, when the GPS signal strength is not less than a preset threshold, run a magnetic sensor calibration algorithm library to calibrate the magnetic sensor.

By setting a preset threshold for the GPS signal strength, and comparing the relationship between the GPS signal strength and the preset threshold, it can be judged whether the mobile terminal is currently in an environment such as a building, tunnel, subway, etc. that strongly interferes with the magnetic sensor, because these environments will also Affects GPS signal recognition ability.

When the GPS signal strength is not less than the preset threshold, it means that the mobile terminal is not in an environment with strong interference to the magnetic sensor such as buildings, tunnels or subways. It is meaningful to calibrate the magnetic sensor. At this time, the magnetic sensor calibration algorithm library is run to obtain corresponding data (such as the data of the magnetic sensor and the data of the acceleration sensor) to calibrate the magnetic sensor. When the GPS signal strength is less than the preset threshold, the magnetic sensor calibration algorithm library is not run, so that the power consumption of the mobile terminal can be saved.

In the technical solution of this embodiment, when it is detected that the application program of the magnetic sensor is opened, the GPS signal strength is obtained, and when the GPS signal strength is not less than a preset threshold, the magnetic sensor calibration algorithm library is run to calibrate the magnetic sensor, so that the The operation of the magnetic sensor calibration algorithm library is accurately controlled, and there is no need to run the magnetic sensor calibration algorithm library for meaningless calibration, thereby reducing the power consumption of the mobile terminal.

On the basis of the above-mentioned embodiment, it also preferably includes:

When the GPS signal strength is less than the preset threshold, the magnetic sensor calibration algorithm library is put to sleep.

When the GPS signal strength is less than the preset threshold, it means that the mobile terminal is not in an environment with strong interference to the magnetic sensor such as buildings, tunnels or subways, because the mobile terminal will not be in the above-mentioned environment with strong interference most of the time, Therefore, it is meaningful to calibrate the magnetic sensor at this time. At this time, the magnetic sensor calibration algorithm library is put to sleep, and the data of the corresponding sensor is not obtained, because even if it is obtained, the calculated data is wrong, thereby reducing the Power consumption of mobile terminals.

Embodiment 2

2 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided in Embodiment 2 of the present invention. This embodiment is optimized on the basis of Embodiment 1. Sensor calibration" is further optimized to "run the magnetic sensor calibration algorithm library; obtain the data of the acceleration sensor, gyroscope and magnetic sensor; calibrate the magnetic sensor according to the data of the acceleration sensor, gyroscope and magnetic sensor", The method specifically includes the following steps:

Step 210, when it is detected that the application program of the magnetic sensor is started, the GPS signal strength is acquired.

Step 220, when the GPS signal strength is not less than a preset threshold, run the magnetic sensor calibration algorithm library.

When the GPS signal strength is not less than the preset threshold, the magnetic sensor calibration algorithm library is run to acquire the data of the corresponding sensor, thereby completing the calibration of the magnetic sensor.

Step 230: Acquire the data of the acceleration sensor, the gyroscope and the magnetic sensor.

After running the magnetic sensor calibration algorithm library, the magnetic sensor calibration algorithm library will obtain the data of the acceleration sensor, gyroscope and magnetic sensor, so as to complete the calibration of the magnetic sensor according to the data of each sensor.

In step 240, the magnetic sensor is calibrated according to the data of the acceleration sensor, the gyroscope and the magnetic sensor.

According to the data of the acceleration sensor, the gyroscope and the magnetic sensor, the magnetic sensor is calibrated by using a magnetic sensor calibration algorithm library. The data of the acceleration sensor, the gyroscope and the magnetic sensor can be substituted into the corresponding position of the corresponding algorithm of the magnetic sensor calibration algorithm library, and the magnetic sensor calibration algorithm library is run to complete the calibration of the magnetic sensor.

The technical solution of this embodiment is based on the above-mentioned embodiment, by running the magnetic sensor calibration algorithm library when the GPS signal strength is not less than the preset threshold, to obtain the data of the acceleration sensor, the gyroscope and the magnetic sensor, according to the obtained data The data of the magnetic sensor is calibrated, thereby reducing the power consumption of the mobile terminal.

Embodiment 3

FIG. 3 is a flowchart of a method for running a magnetic sensor calibration algorithm library provided by Embodiment 3 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiment. When running the magnetic sensor calibration algorithm library, the magnetic sensor After the calibration, "obtain the data of the magnetic sensor after calibration, and report the data of the magnetic sensor to the application program of the magnetic sensor" is added, and the method specifically includes the following steps:

Step 310, when it is detected that the application program of the magnetic sensor is started, the GPS signal strength is acquired.

Step 320, when the GPS signal strength is not less than a preset threshold, run a magnetic sensor calibration algorithm library to calibrate the magnetic sensor.

Step 330: Acquire the data of the magnetic sensor after calibration, and report the data of the magnetic sensor to the application program of the magnetic sensor.

After the calibration of the magnetic sensor is completed, the data of the magnetic sensor is obtained, and the obtained data of the magnetic sensor is reported to the application of the magnetic sensor, so that the application of the magnetic sensor can calculate and obtain the corresponding display data according to the data of the magnetic sensor. to users. For example, the map application calculates the correct heading, and the compass application calculates the correct compass pointing.

In the technical solution of this embodiment, when the GPS signal strength is not less than the preset threshold, after the magnetic sensor is calibrated by running the magnetic sensor calibration algorithm library, the data of the magnetic sensor is obtained and reported to the application program of the magnetic sensor, so that the The application can calculate the corresponding display data according to the data of the magnetic sensor, which makes the display data more accurate.

Embodiment 4

FIG. 4 is a schematic structural diagram of a device for running a magnetic sensor calibration algorithm library provided in Embodiment 4 of the present invention. As shown in FIG. 4 , the device for running a magnetic sensor calibration algorithm library according to this embodiment includes: GPS signal strength acquisition Module 410 and Magnetic Sensor Calibration Module 420.

Wherein, the GPS signal strength acquisition module 410 is used to acquire the GPS signal strength when it is detected that the application program of the magnetic sensor is opened;

The magnetic sensor calibration module 420 is configured to run a magnetic sensor calibration algorithm library to calibrate the magnetic sensor when the GPS signal strength is not less than a preset threshold.

Optionally, also include:

A sleep module, configured to sleep the magnetic sensor calibration algorithm library when the GPS signal strength is less than the preset threshold.

Optionally, the magnetic sensor calibration module includes:

A running unit for running the magnetic sensor calibration algorithm library;

The data acquisition unit is used to acquire the data of the acceleration sensor, the gyroscope and the magnetic sensor;

The magnetic sensor calibration unit is used for calibrating the magnetic sensor according to the data of the acceleration sensor, the gyroscope and the magnetic sensor.

Optionally, also include:

The data reporting module is used for obtaining the data of the magnetic sensor after calibration after running the magnetic sensor calibration algorithm library to calibrate the magnetic sensor, and reporting the data of the magnetic sensor to the application program of the magnetic sensor.

Wherein, the application program of the magnetic sensor preferably includes a map application or a compass application.

The above apparatus for running the magnetic sensor calibration algorithm library can execute the method for running the magnetic sensor calibration algorithm library provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

Embodiment 5

This embodiment provides a mobile terminal, and the mobile terminal may include the apparatus for running the magnetic sensor calibration algorithm library provided in any embodiment of the present invention. FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention. As shown in FIG. 5 , the mobile terminal may include: a memory 501 , a central processing unit (Central Processing Unit, CPU for short) 502 , and a peripheral interface 503, an RF (Radio Frequency, radio frequency) circuit 505, an audio circuit 506, a speaker 511, a power management chip 508, an input/output (I/O) subsystem 509, a touch screen 512, other input/control devices 510, and an external port 504, These components communicate through one or more communication buses or signal lines 507 .

It should be understood that the illustrated mobile terminal 500 is merely an example of a mobile terminal, and that the mobile terminal 500 may have more or fewer components than those shown in the figures, two or more components may be combined, Or can have different component configurations. The various components shown in the figures may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

The following will describe in detail the mobile terminal provided in this embodiment for running the magnetic sensor calibration algorithm library, and the mobile terminal is a mobile phone as an example.

Memory 501, which can be accessed by CPU 502, peripheral interface 503, etc., said memory 501 can include high-speed random access memory, and can also include non-volatile memory, such as one or more disk storage devices, flash memory devices , or other volatile solid-state storage devices.

A peripheral interface 503 that can connect the input and output peripherals of the device to the CPU 502 and the memory 501 .

I/O subsystem 509, which can connect input and output peripherals on the device, such as touch screen 502 (equivalent to the screen in the above embodiment) and other input/control devices 510, to the peripherals interface 503. The I/O subsystem 509 may include a display controller 5091 and one or more input controllers 5092 for controlling other input/control devices 510 . Among them, one or more input controllers 5092 receive electrical signals from or send electrical signals to other input/control devices 510, which may include physical buttons (push buttons, rocker buttons, etc. ), dial pad, slide switch, joystick, click wheel. Notably, the input controller 5092 can be connected to any of the following: a keyboard, an infrared port, a USB interface, and a pointing device such as a mouse.

The touch screen 512, which is an input interface and an output interface between the user terminal and the user, displays visual output to the user, and the visual output may include graphics, text, icons, videos, and the like.

Display controller 5091 in I/O subsystem 509 receives electrical signals from touch screen 512 or sends electrical signals to touch screen 512 . The touch screen 512 detects the contact on the touch screen, and the display controller 5091 converts the detected contact into interaction with the user interface object displayed on the touch screen 512, that is, to realize human-computer interaction, and the user interface object displayed on the touch screen 512 can be run. Icons for games, icons for connecting to the corresponding network, etc. It is worth noting that the device may also include a light mouse, which is a touch-sensitive surface that does not display visual output, or an extension of the touch-sensitive surface formed by a touch screen.

The RF circuit 505 is mainly used to establish the communication between the mobile phone and the wireless network (ie, the network side), and realize the data reception and transmission between the mobile phone and the wireless network. Such as sending and receiving text messages, e-mails, etc. Specifically, the RF circuit 505 receives and transmits RF signals, also known as electromagnetic signals, the RF circuit 505 converts electrical signals into electromagnetic signals or converts electromagnetic signals into electrical signals, and communicates with communication networks and other devices through the electromagnetic signals to communicate. RF circuitry 505 may include known circuitry for performing these functions including, but not limited to, antenna systems, RF transceivers, one or more amplifiers, tuners, one or more oscillators, digital signal processors, CODECs ( COder-DECoder, codec) chip set, subscriber identity module (Subscriber Identity Module, SIM) and so on.

The audio circuit 506 is mainly used for receiving audio data from the peripheral interface 503 , converting the audio data into an electrical signal, and sending the electrical signal to the speaker 511 .

The speaker 511 is used to restore the voice signal received by the mobile phone from the wireless network through the RF circuit 505 to sound and play the sound to the user.

The power management chip 508 is used for power supply and power management for the hardware connected to the CPU 502, the I/O subsystem and the peripheral interface.

The CPU 502 provided in the embodiment of the present invention may perform the following operations:

Get the GPS signal strength of the global positioning system when the application that detects the magnetic sensor is opened;

When the GPS signal strength is not less than a preset threshold, the magnetic sensor calibration algorithm library is run to calibrate the magnetic sensor.

The above mobile terminal can execute the method provided by any embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (9)

1. A method for running a magnetic sensor calibration algorithm library, wherein the method comprises: Get the GPS signal strength of the global positioning system through the application of the magnetic sensor; When the GPS signal strength is not less than a preset threshold, run the magnetic sensor calibration algorithm library to calibrate the magnetic sensor; When the GPS signal strength is less than the preset threshold, the magnetic sensor calibration algorithm library is put to sleep. 2. The method according to claim 1, wherein, running a magnetic sensor calibration algorithm library to calibrate the magnetic sensor comprises: Run the magnetic sensor calibration algorithm library; Obtain data from accelerometers, gyroscopes and magnetic sensors; The magnetic sensor is calibrated according to the data of the acceleration sensor, the gyroscope and the magnetic sensor. 3. The method according to claim 1, wherein after running the magnetic sensor calibration algorithm library to calibrate the magnetic sensor, the method further comprises: Obtain the data of the calibrated magnetic sensor, and obtain the data of the magnetic sensor through the application of the magnetic sensor. 4. The method according to any one of claims 1-3, wherein the application program of the magnetic sensor comprises a map application or a compass application. 5. A device for running a magnetic sensor calibration algorithm library, wherein the device comprises: The GPS signal strength acquisition module is used to obtain the GPS signal strength through the application program of the magnetic sensor; a magnetic sensor calibration module, configured to run a magnetic sensor calibration algorithm library to calibrate the magnetic sensor when the GPS signal strength is not less than a preset threshold; A sleep module, configured to sleep the magnetic sensor calibration algorithm library when the GPS signal strength is less than the preset threshold. 6. The apparatus according to claim 5, wherein the magnetic sensor calibration module comprises: A running unit for running the magnetic sensor calibration algorithm library; The data acquisition unit is used to acquire the data of the acceleration sensor, the gyroscope and the magnetic sensor; The magnetic sensor calibration unit is used for calibrating the magnetic sensor according to the data of the acceleration sensor, the gyroscope and the magnetic sensor. 7. The apparatus of claim 5, further comprising: The data reporting module is used to obtain the data of the calibrated magnetic sensor after running the magnetic sensor calibration algorithm library to calibrate the magnetic sensor, and obtain the data of the magnetic sensor through the application program of the magnetic sensor. 8. The device according to any one of claims 5-7, wherein the application program of the magnetic sensor comprises a map application or a compass application. 9. A mobile terminal, characterized in that, the mobile terminal integrates the device for running a magnetic sensor calibration algorithm library according to any one of claims 5-7.