CN1642183A - Hand-held apparatus and its realizing method thereof - Google Patents

Abstract

The invention discloses a handheld device, which at least includes: a digital compass module, used to obtain geomagnetic direction data according to the current geomagnetic direction, and transmit the obtained geomagnetic direction data to a direction display module; a direction display module, used to The geomagnetic direction data in the digital compass module is converted into graphic display information, and the graphic display information is displayed on the screen of the handheld device. At the same time, the invention also discloses a method for realizing a hand-held device with a direction recognition function. The invention solves the problem that the existing hand-held equipment has no direction recognition function, and directly setting a compass in the hand-held equipment will greatly affect the volume and weight of the hand-held equipment. The solution of the invention realizes the direction recognition function of the handheld device, and at the same time, the modification to the handheld device is very small, and is simple and easy to implement.

Description

A handheld device and its implementation method

technical field

The present invention relates to the technical field of handheld devices, more specifically, to a handheld device with a direction recognition function and a corresponding implementation method.

Background technique

People often have no sense of direction in an unfamiliar environment, which makes it very inconvenient for people to walk. Especially during more adventurous trips such as climbing mountains, crossing forests, meadows or deserts, it can even be dangerous if you lose your sense of direction. Of course, if you can see the sun, you can often tell the direction. However, if it is a rainy day or at night, people often cannot tell the direction. In this case, a compass must be carried. And under normal circumstances, people forget to carry a compass, or even don't want to carry a compass.

With the popularity of handheld devices such as mobile terminals and personal digital assistants (PDAs), people's lives are increasingly inseparable from handheld devices, and handheld devices are often one of the items that people must carry with them. In view of this situation, people wonder whether some commonly used tools can be set into the handheld device, for example, a Swiss army knife, a thermometer, and even a compass can be set into the handheld device. For setting the compass in the handheld device, since the compass is large and heavy, and the size and weight of the handheld device are limited, it is not a good setting method to directly integrate the compass in the handheld device.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a handheld device.

Another object of the present invention is to provide a method for implementing a handheld device with a direction recognition function.

A handheld device of the present invention, the handheld device includes a screen for displaying information, the handheld device at least includes:

The digital compass module is used to obtain geomagnetic direction data according to the current geomagnetic direction, and transmit the obtained geomagnetic direction data to the direction display module;

The direction display module is used for converting the geomagnetic direction data in the digital compass module into graphic display information, and displaying the graphic display information on the screen of the handheld device.

The digital compass module includes two mutually perpendicular magnetic sensors and a geomagnetic direction calculation module;

Two magnetic sensors are used to transmit the voltage generated by itself according to the geomagnetic field to the geomagnetic direction calculation module;

The geomagnetic direction calculation module is used to calculate the declination angle between the geomagnetic direction and the magnetic sensor according to the voltage values transmitted by the two magnetic sensors, and send the declination angle as geomagnetic direction data to the direction display module.

The magnetic sensor includes a magnetoresistor component and a Hall component.

The directions of the two magnetic sensors are respectively parallel and perpendicular to the geomagnetic direction.

A method for realizing a handheld device with a direction recognition function of the present invention, the method includes the following steps:

a. A digital compass module for obtaining geomagnetic direction data information is preset in the handheld device;

b. The handheld device obtains geomagnetic direction data information through the digital compass module, converts the geomagnetic direction data information into graphic display information, and displays the obtained graphic display information on the screen.

In the step a, the digital compass module includes at least two magnetic sensors placed perpendicular to each other;

In step b, the handheld device obtains geomagnetic direction data information through the digital compass module: the magnetic sensor generates a voltage according to the geomagnetic field, and the digital compass module obtains the magnetic declination angle between the magnetic sensor and the geomagnetic direction according to the voltage values generated by the two magnetic sensors.

In the step b, the conversion of the geomagnetic direction data information into graphic display information is: according to the magnetic declination and the angle between the magnetic sensor and the vertical direction of the screen, calculate the direction of the geomagnetic direction and the vertical direction of the screen The deflection angle, and the vertical direction of the screen is used as the reference system, and the corresponding graphic display information is generated according to the direction deflection angle.

The method may further include: pre-setting a direction indicator for indicating the direction;

In step b, displaying the obtained graphic display information on the screen is: displaying the direction on the screen through the direction mark.

The method may further include: pre-setting a circle for displaying direction marks; the direction marks include direction marks respectively corresponding to due east, due west, due south and true north, and the direction marks are displayed vertically and symmetrically on the circumference; or comprising A direction pointer, the fixed end of the direction pointer is the center of the circle.

The method may further include: setting the two magnetic sensors in the digital compass module to be parallel and perpendicular to the vertical direction of the screen respectively.

The handheld device is a mobile terminal or a PDA.

The solution of the present invention provides a digital compass module for obtaining geomagnetic direction data and a geomagnetic direction display module for displaying geomagnetic direction in the handheld device, so that the handheld device can realize the geomagnetic direction recognition function, which greatly facilitates the user's direction recognition . In addition, the solution of the present invention is to display the geomagnetic direction through the screen of the handheld device, so while enabling the handheld device to have the function of recognizing the geomagnetic direction, the modification to the handheld device is very small, or in other words, the volume of the handheld device will not be increased, and the volume of the handheld device will not be increased. Will increase the weight of the handheld device. The solution of the invention also has the advantages of being simple and easy to implement.

Description of drawings

Fig. 1 is a schematic diagram of the connection of each functional module in the solution of the present invention.

Detailed ways

The solution of the present invention is mainly to set a digital compass module in the hand-held device, obtain geomagnetic direction data through the digital compass module; The graphic display information is displayed on the screen of the handheld device.

The scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram showing the connection of various functional modules realizing the direction recognition function in the handheld device. The digital compass module 101 is connected to the geomagnetic direction display module 102 . The digital compass module 101 sends the obtained geomagnetic direction data to the geomagnetic direction display module 102, and the geomagnetic direction display module 102 generates graphic display information according to the obtained geomagnetic direction data, and displays the graphic display information on the screen of the handheld device.

Wherein, the digital compass module 101 is composed of two magnetic sensors 103 , 104 perpendicular to each other, and a geomagnetic direction calculation module 105 . The magnetic sensor is specifically composed of a magnetoresistor component and a Hall component. The two magnetic sensors are respectively connected to the geomagnetic direction calculation module 105 , and the digital compass module 101 is connected to the geomagnetic direction display module 102 through the geomagnetic direction calculation module 105 . The magnetic sensors 103, 104 are respectively connected with the geomagnetic direction calculation module 105, and the geomagnetic direction calculation module 105 calculates the declination angle between the geomagnetic direction and a certain magnetic sensor according to the voltages measured by the two magnetic sensors, and sends the declination angle to the geomagnetic direction. The direction display module 102. The geomagnetic direction display module 102 uses the magnetic sensor as a reference object, and displays the geomagnetic direction on the screen of the handheld device according to the declination angle.

Specifically, when the handheld device rotates, the magnetic flux passing through the two magnetic sensors will change, and voltage values will be generated in the two magnetic sensors respectively. When the rotational angular velocity is constant, when the magnetic sensor 104 is nearly parallel to the geomagnetic direction, the magnetic flux of the magnetic sensor 104 changes the most, and the generated voltage value is the largest. Of course, according to the installation direction of the magnetic sensor, the generated voltage value may be the maximum positive pressure. , it may also be the maximum negative pressure, the magnetic flux of the magnetic sensor 103 has the smallest change, and the generated voltage value is also the smallest; The magnetic flux 103 is the largest, and the voltage value generated is the largest. Similarly, the voltage value may be the maximum positive pressure or the maximum negative pressure.

The two magnetic sensors generate corresponding voltage values due to the geomagnetic field, and the geomagnetic direction calculation module calculates the geomagnetic direction data according to the collected voltage values of the two magnetic sensors, that is, the angle between the magnetic sensor 104 and the geomagnetic direction, that is, the magnetic declination , and send the magnetic declination to the geomagnetic direction display module. The geomagnetic direction display module calculates the angle between the geomagnetic direction and the vertical direction of the screen according to the magnetic declination and the angle between the magnetic sensor 104 and the vertical direction of the screen, that is, the direction declination, and then takes the vertical direction of the screen as a reference system, according to The bearing angle shows the geomagnetic direction on the screen.

For convenience, when setting the directions of the two magnetic sensors in this embodiment, the magnetic sensor 103 can be set to be perpendicular to the vertical direction of the screen of the handheld device, and the magnetic sensor 104 can be set to be horizontal to the vertical direction of the screen of the handheld device. In this way, when the geomagnetic direction display module displays the geomagnetic direction through the pointer, it is no longer necessary to adjust the magnetic declination according to the angle between the magnetic sensor and the vertical direction of the screen to obtain the corresponding direction declination. Magnetic declination is the direction declination.

When the geomagnetic direction display module displays the geomagnetic direction according to the direction declination angle, the direction can be indicated by a direction mark, which can include four direction marks of true east, true west, true south, and true north, and a set that can be completely in the For the circle displayed on the screen, these four direction marks are displayed vertically and symmetrically on the circumference. The direction mark can also include a direction pointer, the fixed end of the direction pointer is set on the center of the circle, and the angle between the direction pointer and the vertical direction of the screen is equal to the direction declination, and the geomagnetic direction is displayed on the screen through the direction pointer, that is, positive north direction.

Through the above settings, the direction can be displayed through the handheld device. When the deflection angle between the vertical direction of the screen and the geomagnetic direction changes due to the rotation of the handheld device, the handheld device can re-display the geomagnetic direction by rotating the direction mark on the screen.

The digital compass module can be realized by a special electronic device, and the geomagnetic direction display module can be integrated into an application program of a mobile terminal, so as to realize the object of the present invention conveniently. The electronic device is called a compass device, and the compass device needs to provide a standard drive interface to the handheld device. The handheld device activates the compass device through the driver interface and obtains the geomagnetic direction data, and then transmits the geomagnetic direction data to the corresponding application program through the application programming interface function, and the application program displays the direction.

The above descriptions are only preferred embodiments of the solutions of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (11)

1. A handheld device comprising a screen for displaying information, characterized in that the handheld device at least comprises: The digital compass module is used to obtain geomagnetic direction data according to the current geomagnetic direction, and transmit the obtained geomagnetic direction data to the direction display module; The direction display module is used for converting the geomagnetic direction data in the digital compass module into graphic display information, and displaying the graphic display information on the screen of the handheld device. 2. The handheld device according to claim 1, wherein the digital compass module includes two mutually perpendicular magnetic sensors and a geomagnetic direction calculation module; Two magnetic sensors are used to transmit the voltage generated by itself according to the geomagnetic field to the geomagnetic direction calculation module; The geomagnetic direction calculation module is used to calculate the declination angle between the geomagnetic direction and the magnetic sensor according to the voltage values transmitted by the two magnetic sensors, and send the declination angle as geomagnetic direction data to the direction display module. 3. The hand-held device of claim 2, wherein the magnetic sensor comprises a magnetoresistor component and a Hall component. 4. The handheld device according to claim 2, wherein the directions of the two magnetic sensors are respectively parallel and perpendicular to the geomagnetic direction. 5. A method for realizing a handheld device with a direction recognition function, characterized in that the method comprises the following steps: a. A digital compass module for obtaining geomagnetic direction data information is preset in the handheld device; b. The handheld device obtains geomagnetic direction data information through the digital compass module, converts the geomagnetic direction data information into graphic display information, and displays the obtained graphic display information on the screen. 6. The method according to claim 5, characterized in that in step a, the digital compass module includes at least two magnetic sensors placed perpendicular to each other; In step b, the handheld device obtains geomagnetic direction data information through the digital compass module: the magnetic sensor generates a voltage according to the geomagnetic field, and the digital compass module obtains the magnetic declination angle between the magnetic sensor and the geomagnetic direction according to the voltage values generated by the two magnetic sensors. 7. The method according to claim 6, characterized in that in the step b, converting the geomagnetic direction data information into graphic display information is: according to the magnetic declination and the distance between the magnetic sensor and the vertical direction of the screen Calculate the angle between the geomagnetic direction and the vertical direction of the screen, and use the vertical direction of the screen as a reference system to generate corresponding graphic display information according to the direction deviation. 8. The method according to claim 7, characterized in that the method further comprises: presetting a direction mark for indicating the direction; In step b, displaying the obtained graphic display information on the screen is: displaying the direction on the screen through the direction mark. 9. The method according to claim 8, characterized in that the method further comprises: pre-setting a circle for displaying direction marks; the direction marks include direction marks respectively corresponding to true east, true west, true south and true north, And the direction mark is displayed vertically and symmetrically on the circumference; or includes a direction pointer, the fixed end of which is the center of the circle. 10. The method according to claim 6, characterized in that the method further comprises: setting the two magnetic sensors in the digital compass module to be parallel and perpendicular to the vertical direction of the screen respectively. 11. The method according to claim 6, wherein the handheld device is a mobile terminal or a personal digital assistant (PDA).

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