Inertia sensing type coordinate input device and method

Abstract

The invention discloses an inertia sensing coordinate input device and a method for using the same, wherein the device comprises accelerometers capable of detecting the accelerations along X, Y, Z three axes, and a gyroscope taking the Z axis as the axis and used for detecting rotation; the coordinate input method is as follows: defining signals in a static state of sensing components as basis signals; detecting whether the acceleration along the Z axis can be changed by means of the Z axis accelerometer; if no obvious change is made in the acceleration along the Z axis in a constant sampling period compared with the basis signal, performing a plane operation mode of detecting acceleration changes of left-right displacement and forward-backward displacement by using the X axis accelerometer and the Y axis accelerometer and obtaining displacement, which serves as an coordinate input value after being adjusted in measurement, by the double integration of the signals of the accelerations of the X axis and the Y axis; if the great change in the acceleration of the Z axis, performing space operation. In addition, in the plane operation mode, the gyroscope can be used to detect the rotation of the device to compensate for the acceleration signals of the X axis and the Y axis.

Description

technical field [0001] The present invention relates to an inertial sensing type coordinate input device and method, in particular to a structure using an accelerometer and a gyroscope, which can be operated on a flat surface without being limited by the operating space. Inertial sensing computer input device and method with planar / spatial function operated in space, in planar (2D) mode, use gyroscope to detect the rotation of the device to compensate for the involuntary rotation of manual operation and eliminate the inertial sensing component electronics Noise interference overcomes the technical barriers of pure accelerometer coordinate input devices and achieves a natural and smooth control feeling, which is suitable for input device applications and manufacturing related industries. Background technique [0002] There are many types of existing cursor control devices. For example, the mouse is mostly used to control the cursor of a computer monitor, and the presenter for...

AI Technical Summary

Problems solved by technology

[0004] For patents, please refer to US Patent No. 4787051 "Inertial Mouse System" shown in Figure 1, which discloses an inertial mouse 10, which mainly has an X-axis accelerometer 16, and the sensing direction is related to the described The X-axis accelerometer 16 is vertical and is divided into the Y-axis accelerometers 14,18 on both sides of the X-axis accelerometer 16, and the acceleration difference of the Y-axis accelerometers 14,18 is used to calculate the inertial mouse 10 The amount of rotation, in conjunction with the acceleration change sensed by the X-axis accelerometer 16, utilizes the hardware algorithm again to digitize the curve trajectory of the inertial mouse 10 movement to input into the computer; the pure accelerometer coordinate input device, due to the rotation The amount is calculated indirectly by the difference between the two accelerometers, so the error is huge, and because it only has X-axis and Y-axis accelerometers, it can only be operated on a plane

[0005] Please refer to the U.S. Patent No. 5,898,421 "Gyroscopic pointer and method" shown in Fig. 2, which discloses an indicator, which can drive a mechanical gyroscope 110 to rotate with an external power supply 190, and the mechanical gyroscope 110 is pivotally connected in an inner frame 170 by means of a set of cardan shafts 115, 120, and the inner frame 170 relies on another set of cardan shafts 140, 145 is pivotally connected in an outer frame 160. When the device is operated in free space, the rotation amount of the gyroscope 110 can be corresponding to the cursor X, Y of the display device by means of the computer connection head 180 The amount of two-axis movement; the above-mentioned indicator is only suitable for free space because it uses a pure gyroscope to input coordinates, and cannot be used on a plane. Moreover, the mechanical gyroscope is bulky and has a high error value

[0006] see again image 3 As shown in US Patent No. 5825350 "Electronic pointing apparatus and method", the case discloses a pointing device 100 that can operate in a plane and in space. It is provided with a rolling ball 260 inside the pointing device 100, and The internal circuit board 452 is provided with a gyroscope circuit, and a lever 472 is linked by a piston 270. When the indicating device 100 is pressed on a plane and used (that is, when used as a mouse), the piston 270 The lever 472 can be pushed up so that the rolling ball 260 can move freely. When the indicating device 100 is lifted, the piston 270 can naturally pull the lever 472 down. , so that the protrusion 506 arranged at the bottom of the lever 472 is pressed against the rolling ball 260 to restrict the movement of the rolling ball 260. At this time, the indicating device 100 can be used as an indicator, By virtue of the circuit board 452 provided with the gyroscope circuit, the amount of movement of the pointing device 100 can be detected and corresponded to the cursor of the display device; however, the lever 472 and the bump 506 cannot really suppress the The above-mentioned rolling ball 260, when the human hand shakes the above-mentioned pointing device 100 in space, it is very easy to cause the above-mentioned rolling ball 260 to move or roll unexpectedly, thereby generating unnecessary moving signals and affecting coordinate input. Therefore, The described structure has not been implemented or applied in the consumer market

[0007] Currently available on the market with image 3 The pointing device shown is a similar consumer product, which combines a gyroscope in an optical mouse. Although the optical sensing device can avoid the problem of unexpected movement of the rolling ball, however, whether it is a rolling ball or optical sensing, The rolling ball responsible for planar operation, the optical sensing and the gyroscope circuit responsible for space operation are not related to each other. The above-mentioned similar structure only provides a shared housing for accommodating the two operation mode devices. Not only the basic functions are not increased, but the overall device is complicated and bulky, and the weight increases

[0008] Another example Figure 4 As shown, the Taiwan Province of China Patent Application No. 90221010 "Gravity Mouse", which uses a gravity detection IC to measure the potential energy of an object, converts the potential energy into a signal generated by kinetic energy, and transmits it to the microprocessor IC for calculation. The microprocessor IC can detect the time of the gravity detection IC movement, and receive the acceleration value generated by the gravity detection IC movement, calculate and convert it into an actual movement unit, and transmit it to the computer host to control the direction of the screen cursor; The main calculation means of the case is that when the mouse moves in space, the accelerometers with two or more axes are used to perform integral calculations to control the movement of the cursor. The biggest disadvantage of the above method is that it will generate cumulative errors, resulting in distortion of the cursor positioning

[0009] According to the above, it can be known how to have a plane / space operation function that is not limited by the operating space, can overcome the coordinate distortion and large error of the existing pure accelerometer or pure gyroscope coordinate input device, and at the same time can compensate Coordinate input devices that cause errors caused by involuntary manual operation are an urgent issue for relevant industry players to solve

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