CN101504574B - Hand-hold pointing device and method thererof - Google Patents
Hand-hold pointing device and method thererof Download PDFInfo
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- CN101504574B CN101504574B CN2008100048611A CN200810004861A CN101504574B CN 101504574 B CN101504574 B CN 101504574B CN 2008100048611 A CN2008100048611 A CN 2008100048611A CN 200810004861 A CN200810004861 A CN 200810004861A CN 101504574 B CN101504574 B CN 101504574B
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Abstract
The invention relates to a handheld pointing device, a pointing method thereof and a method for improving static migration. The handheld pointing device comprises a first quartz piezoelectric gyro, a second quartz piezoelectric gyro and a processing unit, wherein the processing unit is coupled with the first quartz piezoelectric gyro and the second quartz piezoelectric gyro respectively. The quartz piezoelectric gyros are used for detecting the rotation of the handheld pointing device and generating a first rotation output and a second rotation output, and the processing unit is used for generating pointing signals according to the first rotation output and the second rotation output.
Description
Technical field
The present invention relates to a kind of hand-held indicator device, particularly relate to a kind of hand-held indicator device and pointing method thereof.
Background technology
In the past, the indicator device of image processor, mouse as computer, must be placed on auxiliary plane (as desktop) in use and go up use, and must be connected with computer with a cable, so having limited the user must use in a bearing, more is difficult to reach by intuitive sensing behavior the purpose of control cursor position.
Develop gradually in recent years and the hand-held indicator device, allow the user be not necessarily limited to bearing and use this indicator device just can reach moving of controlling computer onscreen cursor.Yet sensor wherein mostly is two accelerometers or the micro-electro-mechanical gyroscope or the gyrostatic combination of optical fiber type of accelerometer and mechanical type gyroscope or capacitance sensing formula.
For example, with the hand-held indicator device of two accelerometers as sensor, it is to utilize two of accelerometer detectings axially and the angle of gravity axis, and the output signal of degree of will speed up meter is processed into controlling signal and reaches image processor such as computer by wireless transmission method again.Yet in when operation, must control moving of cursor on the screen, not meet ergonomics in the mode that tilts.
In addition, mechanical type gyroscope volume is bigger, thereby and is not suitable as the sensor of hand-held indicator device.And the optical fiber type gyroscope also big and cost is high because of volume does not have a market competitiveness.
Summary of the invention
In view of this, the objective of the invention is to overcome the deficiencies in the prior art and defective, propose the method for the static drift of a kind of hand-held indicator device and pointing method thereof and improvement, to improve the defective of prior art.
For reaching above-mentioned purpose, according to a specific embodiment, the invention provides a kind of hand-held indicator device, comprise the first quartzy piezoelectric type gyroscope, the second quartzy piezoelectric type gyroscope, reach processing unit.The first quartzy piezoelectric type gyroscope is judged the hand-held indicator device in the rotation of first direction, and produces one first rotation output.The second quartzy piezoelectric type gyroscope judges that above-mentioned hand-held indicator device is in the rotation of second direction and produce the second rotation output.Processing unit couples the first quartzy piezoelectric type gyroscope and the second quartzy piezoelectric type gyroscope, and produce with the second rotation output according to the first rotation output and to point to output, and in the use of hand-held indicator device, if the hand-held indicator device is kept static greater than a Preset Time, then processing unit upgrades the gyrostatic static reference voltage of the first quartzy piezoelectric type according to the first rotation output.
For reaching above-mentioned purpose, according to a specific embodiment, the present invention also provides a kind of pointing method of hand-held indicator device, comprise the steps: to judge the hand-held indicator device in the rotation of first direction and the rotation of second direction, and produce the first rotation output and the second rotation output by quartzy piezoelectric type gyroscope; If the hand-held indicator device is kept static greater than a Preset Time, then according to the above-mentioned first rotation output upgrade quartzy piezoelectric type gyroscope in first direction the static reference voltage step of renewal of static reference voltage; And produce with the second rotation output according to the second rotation output and to point to output.
For reaching above-mentioned purpose, according to a specific embodiment, the present invention provides a kind of method of the static drift of elimination of hand-held indicator device in addition, the hand-held indicator device comprises quartzy piezoelectric type gyroscope, in order to judge the rotation of hand-held indicator device, and produce a rotation output, comprise the steps: to export and calculate present rotation value according to the rotation that quartzy piezoelectric type gyroscope is provided; Judge whether to upgrade maximum rotation value and minimum rotation value according to present rotation value; Judge that whether the hand-held indicator device is in static state; And static if the hand-held indicator device is kept greater than a Preset Time, then utilize present rotation value to upgrade the gyrostatic static reference voltage of quartzy piezoelectric type.
According to a preferred embodiment of the present invention, in the use of above-mentioned hand-held indicator device, if the hand-held indicator device is kept static greater than a Preset Time, then above-mentioned processing unit upgrades the gyrostatic static reference voltage of the second quartzy piezoelectric type according to the second rotation output.
According to a preferred embodiment of the present invention, the first quartzy piezoelectric type gyroscope comprises quartzy body, driving circuit, reaches testing circuit.Driving circuit couples quartzy body, and drives quartzy body and vibrate.Testing circuit couples quartzy body, and exports to produce first rotation in order to the vibration that detects quartzy body.
According to a preferred embodiment of the present invention, the first quartzy piezoelectric type gyroscope couples low-pass filter, the low pass filter coupled amplifier, and amplifier couples processing unit.
According to a preferred embodiment of the present invention, in the static reference voltage step of above-mentioned renewal, also comprise the steps: to calculate present rotation value according to the first rotation output; Judge whether to upgrade maximum rotation value and minimum rotation value according to present rotation value; Judge that whether the hand-held indicator device is in static state; And static if the hand-held indicator device is kept greater than Preset Time, then utilize present rotation to be worth and upgrade above-mentioned static reference voltage.
According to a preferred embodiment of the present invention, deduct by static reference voltage stored in the mnemon with the above-mentioned first rotation output.
According to a preferred embodiment of the present invention, if above-mentioned present rotation value greater than above-mentioned maximum rotation value, is then upgraded above-mentioned maximum rotation value with above-mentioned present rotation value.
According to a preferred embodiment of the present invention, if above-mentioned present rotation value less than above-mentioned minimum rotation value, is then upgraded above-mentioned minimum rotation value with above-mentioned present rotation value.
According to a preferred embodiment of the present invention, utilize above-mentioned maximum rotation value to deduct above-mentioned minimum rotation value and whether peak value is judged whether above-mentioned hand-held indicator device is static less than default peak.
The present invention adopts the sensor of quartzy piezoelectric type gyroscope as the hand-held indicator device, make the volume of indicator device can be contracted to hand-held size, and can reach the purpose that cursor moves on the control image processor with the sensing behavior of conscious formula, allow the user meet use operation under the operator scheme of ergonomics.In addition, have more stable pointing capability, simultaneously its static reference voltage value has been carried out upgrading in an embodiment of the present invention and handled, to solve its static drift problem in order to guarantee quartzy piezoelectric type gyroscope.
For above-mentioned feature and advantage of the present invention can be become apparent, existing especially exemplified by preferred embodiment, and conjunction with figs., be described in detail below.
Description of drawings
Fig. 1 is the functional block diagram according to a hand-held indicator device of first embodiment of the invention;
Fig. 2 is the sensing input system synoptic diagram according to the present embodiment of first embodiment of the invention;
Fig. 3 is the functional block diagram according to gyrostatic one of them sensing cell of quartzy piezoelectric type of first embodiment of the invention;
Fig. 4 A be according to first embodiment of the invention the sectional view of gyrostatic one of them sensing cell of quartzy piezoelectric type;
Fig. 4 B is the schematic top plan view of quartzy body among the presentation graphs 4A;
Fig. 4 B is the schematic top plan view of quartzy body 21 among Fig. 4 A;
Fig. 5 is the functional block diagram of hand-held indicator device according to another embodiment of the present invention;
Fig. 6 illustrates the synoptic diagram that gyroscope produces static drift;
Fig. 7 is the process flow diagram that upgrades a gyrostatic static reference voltage value of quartzy piezoelectric type according to one embodiment of the invention.
Embodiment
Fig. 1 is the functional block diagram according to a hand-held indicator device of first embodiment of the invention.The hand-held indicator device 10 that present embodiment provided comprises quartzy piezoelectric type gyroscope 11, low-pass filter (LPF) 12, amplifier 13, processing unit 14, wireless transport module 15, reaches mnemon 16.Quartzy piezoelectric type gyroscope 11 is coupled to low-pass filter 12, and low-pass filter 12 is coupled to amplifier 13, and amplifier 13 is coupled to processing unit 14, and wireless transport module 15 is coupled to processing unit 14, and mnemon 16 is coupled to processing unit 14.
In the present embodiment, quartzy piezoelectric type gyroscope 11 is to couple low-pass filter 12 earlier, and low-pass filter 12 couples amplifier 13 more then.In other embodiments, quartzy piezoelectric type gyroscope 11 also can couple amplifier 13 earlier, and amplifier 13 couples low-pass filter 12 again.
Above-mentioned low-pass filter 12 carries out low-pass filtering treatment in order to the output signal to quartzy piezoelectric type gyroscope 11.Above-mentioned amplifier 13 is in order to amplify the signal that it received.It should be noted that the processing unit 14 that present embodiment provides more comprises analog/digital converter (figure does not show), carries out analog/digital conversion earlier with the signal that amplifier 13 was handled.Above-mentioned wireless transport module 15 is exported in order to the sensing that receives processing unit 14, and the sensing output that it received is sent to a receiving end by wireless network.Above-mentioned mnemon 16 is in order to store the associative operation data of reference voltage value and hand-held indicator device.
Fig. 2 shows the sensing input system synoptic diagram of present embodiment.In Fig. 2, hand-held indicator device 10 is the receiving ends 41 that are sent to image processor 40 by the sensing output that wireless transport module 15 is produced hand-held indicator device 10.In the present embodiment, receiving end 41 is to be coupled to image processor 40 by USB interface.In addition, this image processor 40 comprises a display unit (figure does not show).Thus, the sensing output that hand-held indicator device 10 is provided can be converted to one by image processor 40 and point to position signalling, and hand-held indicator device 10 can be reached the operation of control image processor 40.In the present embodiment, image processor 40 is a notebook computer; In other embodiments, image processor 40 can be desktop PC, Digital Television or video and music entertainment system.
Please continue with reference to Fig. 1, in the present embodiment, quartzy piezoelectric type gyroscope 11 is the multiaxis gyroscope, and it rotates output (Rop2) to low-pass filter 12 in order to the rotation of sensing hand-held indicator device 10 about both direction so that the first rotation output (Rop1) and second to be provided respectively.In the present embodiment, quartzy piezoelectric type gyroscope 11 is that two sensing cells are encapsulated in single the chip, and each sensing cell is in order to the rotation of sensing hand-held indicator device 10 about some directions, so that a rotation output to be provided.
Fig. 3 shows the functional block diagram of one of them sensing cell of the quartzy piezoelectric type gyroscope 11 that present embodiment provides.Above-mentioned sensing cell 20 comprises quartzy body 21, driving circuit 21 and testing circuit 23.Driving circuit 21 is coupled to quartzy body 21, vibrates in order to drive above-mentioned quartzy body 21.Testing circuit 23 also is coupled to quartzy body 21, in order to the vibration that detects above-mentioned quartzy body 21 and (for example: the first rotation output) produce a rotation output.
Fig. 4 A shows the sectional view of gyrostatic one of them sensing cell of quartzy piezoelectric type that present embodiment provided.The explanation of relevant Fig. 3 is please in the lump with reference to Fig. 3 and Fig. 4 A.In Fig. 4 A, sensing cell 20 comprises receptacle 25, lid 26, quartzy body 21, supporting substrate 28, lead plate 29, reaches integrated circuit 30.In the present embodiment, said integrated circuit 30 is configured in the bottom of receptacle 25, and is to install in ventricumbent mode.Integrated circuit 30 comprises driving circuit 21 and testing circuit 23.
Sensing cell 20 utilizes lead plate 29 to support its central portion, and lead plate 29 is fixed on the supporting substrate 28 of the bottom that is disposed at receptacle 25.The top of receptacle 25 is being sealed by lid 26, so that receptacle 25 inside are remained vacuum environment.
Fig. 4 B is the schematic top plan view of quartzy body 21 among Fig. 4 A.In the present embodiment, quartzy body 21 has a double T type structure.Quartzy body has the X-axis that is called as electric axis, the Z axle that is called as the Y-axis of mechanical axis and is called as optical axis.And quartzy body 21 has the thickness of regulation in Z-direction, and is formed in the XY plane.
In addition, the surface of detecting shaker arm 211A, 211B is formed with output electrode (figure does not show), and the surface that drives shaker arm 213,214 is formed with drive electrode (figure does not show).So, just can utilize and detect the detection vibrational system that shaker arm 211A, 211B constitute detection angular velocity, utilize linking arm 212A, 212B and driving shaker arm 213,214 to constitute the driving vibrational system that drives quartzy body 21.Thus, when hand-held indicator device 20 is rotated, detect vibrational system and can obtain the angular velocity of hand-held indicator device 20 around the rotation of Z axle, again this angular velocity is converted to the rotation output that is directly proportional with it, then through after low-pass filtering, the amplification, be resent to processing unit 14 and carry out relevant treatment.
Fig. 5 shows the functional block diagram of the hand-held indicator device of another embodiment of the present invention.The hand-held indicator device 50 that present embodiment provided comprises quartzy piezoelectric type gyroscope 51,52, low-pass filter 53,54, amplifier 55,56, processing unit 57, wireless transport module 58 and mnemon 59.Quartzy piezoelectric type gyroscope 51 is coupled to low-pass filter 53, and low-pass filter 53 is coupled to amplifier 55, and amplifier 55 is coupled to processing unit 57.Quartzy piezoelectric type gyroscope 52 is coupled to low-pass filter 54, and low-pass filter 54 is coupled to amplifier 56, and amplifier 56 is coupled to processing unit 57.Wireless transport module 58 is coupled to processing unit 57, and mnemon 59 is coupled to processing unit 57.In the present embodiment, the function of each assembly of inside of hand-held indicator device 50 is similar to the above embodiments, having only quartzy piezoelectric type gyroscope 51 is the quartzy piezoelectric type gyroscope of single shaft in the present embodiment, and quartzy piezoelectric type gyroscope 5 is the quartzy piezoelectric type gyroscope of single shaft in the present embodiment.
In general, traditional hand-held indicator device is if utilize the sensor of gyroscope for spatial direction, then the center reference voltage of the output of its employed gyro sensor (static reference voltage) can produce static drift (Bias drift) along with time, operating process or temperature, as the A～A ' interval among Fig. 6.Static drift meeting makes the hand-held indicator device point to the drift that the opereating specification of image processor can be gradually, makes the hand-held indicator device can't control the operation of image processor accurately.Therefore, in an embodiment of the present invention, the hand-held indicator device that preferred embodiment of the present invention provided, in the use of hand-held indicator device, the hand-held indicator device is exported according to the gyrostatic rotation of quartzy piezoelectric type and is upgraded its static reference voltage.
Fig. 7 shows the process flow diagram of a gyrostatic static reference voltage value of quartzy piezoelectric type of one embodiment of the invention renewal.Fig. 7 shows the static reference voltage value W0 that for example upgrades quartzy piezoelectric type gyroscope 51, and in the present embodiment, quartzy piezoelectric type gyroscope 51 is in order to the rotation of sensing hand-held indicator device 50 in X-direction.The explanation of relevant Fig. 7 please be in the lump with reference to Fig. 5 and Fig. 7.In the present embodiment, every time T, processing unit 57 is just once judged whether need to upgrade the static reference voltage value W0 of quartzy piezoelectric type gyroscope 511 with decision.
In step S705, when the power supply of hand-held indicator device 50 was unlocked, processing unit 57 read the static reference voltage value W0 of quartzy piezoelectric type gyroscope 511 from mnemon 59.
In step S710, processing unit 57 receives the first rotation output that quartzy piezoelectric type gyroscope 511 is produced, processing unit 57 also deducts the static reference voltage value of being read by in the mnemon 59 with the above-mentioned first rotation output, to judge the present rotation value of present hand-held indicator device 50.For example: if first rotation is output as 1.9V, be 1V by the static reference voltage value of being read in the mnemon 59, then the rotation value is positive 0.9V at present.Therefore, processing unit 57 can be judged hand-held indicator device 50 and rotate on X axis, and promptly hand-held indicator device 50 is up to point to.If first rotation is output as 0.1V, is 1V by the static reference voltage value of being read in the mnemon 59, then the rotation value is negative 0.9V at present.Therefore, processing unit 57 can be judged hand-held indicator device 50 along X axis rotation down, and promptly hand-held indicator device 50 is down to point to.
In step S715, processing unit 57 judges that further whether present rotation value is greater than the maximum rotation value (W_max) in the time of calculating static drift.If at present the rotation value is greater than the maximum rotation value in the time of calculating static drift, then be worth to come maximum rotation value (step S720) in time of the static drift of update calculation with present rotation.If the rotation value is not greater than the maximum rotation value in the time of calculating static drift, then execution in step S725 at present.
For example: if the rotation value is positive 0.9V at present, and the maximum rotation value of calculating in time of static drift (preceding once maximum rotation value) is 0V, then with present rotation value (+0.9V) come maximum rotation value (0V) (step S720) in time of the static drift of update calculation.
In step S725, processing unit 57 judges that further whether present rotation value is less than the minimum rotation value (W_min) in the time of calculating static drift.If at present the rotation value is less than the minimum rotation value in the time of calculating static drift, then be worth to come minimum rotation value (step S730) in time of the static drift of update calculation with present rotation.If the rotation value is not less than the minimum rotation value that is stored in the mnemon 59, then execution in step S735 at present.Therefore, in the present embodiment, interior maximum rotation value and the minimum rotation value of time of calculating static drift might be updated always.
For example: if the rotation value is negative 0.8V at present, and the minimum rotation value (preceding once minimum rotation value) that is stored in the mnemon 59 is negative 0.9V, then execution in step S735.
Noticeable, though in the present embodiment, step S715 is performed earlier, follows execution in step S725 again.In other embodiments, also can first execution in step S725, then execution in step S715 again.
In step S735, processing unit 57 is in order to judge that hand-held indicator device 50 is whether in the situation of static state.In the present embodiment, processing unit 57 utilizes the interior maximum rotation value of time of calculating static drift to deduct the interior minimum rotation value of time of calculating static drift, to obtain a present peak to peak value.Then, processing unit 57 comparison peaks to peak value whether less than a default peak to peak value, wherein default peak is a predefined value in the calculation unit to peak value.If at present the peak to peak value less than default peak to peak value, then representing hand-held indicator device 50 is at present under almost static state, then execution in step S745.For example: hand-held indicator device 50 is placed on the table, or hand-held indicator device 50 is taken motionless by the user.If at present the peak to peak value greater than default peak to peak value, then represent hand-held indicator device 50 just to be operated at present, and hand-held indicator device 50 may be by user rotary manipulation, execution in step S740 then significantly by the user.
In step S740, processing unit 57 replacement (Reset) its inner counters (figure does not show) and rotation accumulated value.In step S745, represent hand-held indicator device 50 at present in stationary state, so processing unit 57 is carried out add up (counter++) of count value, and rotation value at present (W_cur) is added to rotation accumulated value (W_sum=W_sum+W_cur).For example: present count value is 0, and the rotation accumulated value is 0, and processing unit 57 adds 1 with count value, and will rotation value at present (for example: 0.9V) add up, make that rotating accumulated value equals 0.9V.If next time is execution in step S740 again, then will continue to add up according to above-mentioned accumulated value.
In step S750, processing unit 57 judges whether hand-held indicator device 50 keeps a period of time in static dress attitude.In the present embodiment, processing unit 57 utilizes a pre-set count values to judge.This pre-set count values is to be used for time of the static drift of identification aforementioned calculation.That is in the present embodiment, pre-set count values is represented above-mentioned Preset Time relatively, if the hand-held indicator device is kept static counting greater than pre-set count values, just upgrades the static reference voltage of quartzy piezoelectric type gyroscope 51.For example: after the processing unit 57 execution of step S745, whether processing unit 57 judges the count value of present counter greater than pre-set count values, if not, and processing unit 57 execution in step S710 then.If processing unit 57 judges that the count value of present counter is greater than pre-set count values, then represent hand-held indicator device 50 in stationary state a period of time, and quartzy piezoelectric type gyroscope 511 has produced static drift, therefore, processing unit 57 execution in step S755 are to upgrade the static reference voltage value in the mnemon 59.
In step S755, the processing unit 57 of present embodiment utilizes following formula to calculate the static reference voltage value that makes new advances:
Wstatic＝Wsum/N+Wstatic_org
Wherein, the static reference voltage value that the Wstatic representative is new, Wsum representative rotation accumulated value, N represents pre-set count values, and the Wstatic_org representative is stored in the static reference voltage value in the mnemon 59 at present.
For example: the static reference voltage value that originally is stored in the mnemon 59 is 1V, the rotation accumulated value is 1.6V, pre-set count values is 80, then new static reference voltage value is 1.2V, therefore be output as 1.2V if processing unit 57 receives first rotation of quartzy piezoelectric type gyroscope 51 again, then the present rotation value that calculated in step S710 of processing unit 57 is 0V.Then, processing unit 57 execution in step S715 and S725 are neither can upgrade maximum rotation value and minimum rotation value.Then, processing unit 57 execution in step S740.Therefore, for quartzy piezoelectric type gyroscope 51, the static drift of its static reference voltage value is enhanced, so that hand-held indicator device 50 can be controlled the operation of image processor accurately.
In step S705, when the power supply of hand-held indicator device 50 was unlocked, processing unit 57 read the static reference voltage value W0 of quartzy piezoelectric type gyroscope 51 from mnemon 59.
In step S710, processing unit 57 receives the first rotation output that quartzy piezoelectric type gyroscope 51 is produced, processing unit 57 also deducts the static reference voltage value of being read by in the mnemon 59 with the above-mentioned first rotation output, to judge the present rotation value of present hand-held indicator device 50.For example: if first rotation is output as 1.9V, be 1V by the static reference voltage value of being read in the mnemon 59, then the rotation value is positive 0.9V at present.Therefore, processing unit 57 can be judged hand-held indicator device 50 and rotate on X axis, and promptly hand-held indicator device 50 is up to point to.If first rotation is output as 0.1V, is 1V by the static reference voltage value of being read in the mnemon 59, then the rotation value is negative 0.9V at present.Therefore, processing unit 57 can be judged hand-held indicator device 50 along X axis rotation down, and promptly hand-held indicator device 50 is down to point to.
As mentioned above, the process flow diagram of Fig. 7 is applicable to the quartzy piezoelectric type gyroscope 51 of hand-held indicator device 50, and in the present embodiment, the process flow diagram of Fig. 7 also is suitable for the quartzy piezoelectric type gyroscope 52 of hand-held indicator device 50, in this just no longer repeat specification.
In sum, the present invention adopts preferred embodiment with the sensor of quartzy piezoelectric type gyroscope as the hand-held indicator device, make the big I of volume of indicator device be contracted to hand-held size, and can reach the purpose that cursor moves on the control image processor with the sensing behavior of conscious formula, allow the user meet use operation under the operator scheme of ergonomics.In addition, have more stable pointing capability, simultaneously its static reference voltage value has been carried out upgrading in an embodiment of the present invention and handled, to solve its static drift problem in order to guarantee quartzy piezoelectric type gyroscope.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (18)
1. a hand-held indicator device is characterized in that, comprising:
The first quartzy piezoelectric type gyroscope in order to judging the rotation of above-mentioned hand-held indicator device about first direction, and produces one first rotation output;
The second quartzy piezoelectric type gyroscope in order to judging the rotation of above-mentioned hand-held indicator device about second direction, and produces the second rotation output; And
Processing unit, couple the above-mentioned first quartzy piezoelectric type gyroscope and the above-mentioned second quartzy piezoelectric type gyroscope, and produce with the above-mentioned second rotation output according to the above-mentioned first rotation output and to point to output, when stating the hand-held indicator device in the use, if above-mentioned hand-held indicator device is kept static greater than a Preset Time, then above-mentioned processing unit upgrades the gyrostatic static reference voltage of the above-mentioned first quartzy piezoelectric type according to the above-mentioned first rotation output.
2. hand-held indicator device according to claim 1, it is characterized in that, in the use of above-mentioned hand-held indicator device, if above-mentioned hand-held indicator device is kept static greater than a Preset Time, then above-mentioned processing unit upgrades the above-mentioned second quartzy piezoelectric type gyrostatic one static reference voltage according to the above-mentioned second rotation output.
3. hand-held indicator device according to claim 1 is characterized in that, the above-mentioned first quartzy piezoelectric type gyroscope comprises:
Quartzy body;
Driving circuit couples above-mentioned quartzy body, and drives above-mentioned quartzy body and vibrate; And
Testing circuit couples above-mentioned quartzy body, in order to the vibration that detects above-mentioned quartzy body and produce the above-mentioned first rotation output.
4. hand-held indicator device according to claim 1 is characterized in that, the above-mentioned first quartzy piezoelectric type gyroscope couples low-pass filter, above-mentioned low pass filter coupled amplifier, and above-mentioned amplifier couples above-mentioned processing unit.
5. the pointing method of a hand-held indicator device is characterized in that, comprising:
Judge above-mentioned hand-held indicator device about the rotation of first direction and the rotation of second direction by quartzy piezoelectric type gyroscope, and produce the first rotation output and the second rotation output;
If above-mentioned hand-held indicator device is kept static greater than a Preset Time, then upgrade above-mentioned quartzy piezoelectric type gyroscope about the static reference voltage step of the renewal of the static reference voltage of above-mentioned first direction according to the above-mentioned first rotation output; And
Rotate output according to above-mentioned first and produce sensing output with the above-mentioned second rotation output.
6. pointing method according to claim 5, it is characterized in that, also comprise: static if above-mentioned hand-held indicator device is kept greater than a Preset Time, then upgrade above-mentioned quartzy piezoelectric type gyroscope about the static reference voltage step of the renewal of the static reference voltage of above-mentioned second direction according to the above-mentioned second rotation output.
7. pointing method according to claim 5 is characterized in that, also comprises the steps: in the static reference voltage step of above-mentioned renewal
Calculate the present rotation value of exporting about above-mentioned first rotation according to the above-mentioned first rotation output;
Judge whether to upgrade maximum rotation value and minimum rotation value according to above-mentioned present rotation value; And
Judge that whether above-mentioned hand-held indicator device is in static state.
8. pointing method according to claim 7 is characterized in that, deducts by above-mentioned static reference voltage stored in the mnemon with the above-mentioned first rotation output, to judge the present rotation value of above-mentioned hand-held indicator device.
9. pointing method according to claim 7 is characterized in that, if above-mentioned present rotation value greater than above-mentioned maximum rotation value, is then upgraded above-mentioned maximum rotation value with above-mentioned present rotation value.
10. pointing method according to claim 7 is characterized in that, if above-mentioned present rotation value less than above-mentioned minimum rotation value, is then upgraded above-mentioned minimum rotation value with above-mentioned present rotation value.
11. pointing method according to claim 7 is characterized in that, utilizes above-mentioned maximum rotation value to deduct above-mentioned minimum rotation value and whether less than default peak peak value is judged whether above-mentioned hand-held indicator device is static.
12. the method for the static drift of the elimination of a hand-held indicator device, above-mentioned hand-held indicator device comprises quartzy piezoelectric type gyroscope, in order to judging the rotation of above-mentioned hand-held indicator device, and produces a rotation output, it is characterized in that, comprising:
The above-mentioned rotation that the above-mentioned quartzy piezoelectric type gyroscope of foundation is provided is exported and is calculated present rotation value;
Judge whether to upgrade maximum rotation value and minimum rotation value according to above-mentioned present rotation value;
Judge that whether above-mentioned hand-held indicator device is in static state; And
If above-mentioned hand-held indicator device is kept static greater than a Preset Time, then utilize above-mentioned present rotation to be worth and upgrade the gyrostatic static reference voltage of above-mentioned quartzy piezoelectric type.
13. method according to claim 12 is characterized in that, exports stored static reference voltage in the mnemon that deducts by above-mentioned hand-held indicator device with above-mentioned rotation, to judge the present rotation value of above-mentioned hand-held indicator device.
14. method according to claim 12 is characterized in that, if above-mentioned present rotation value greater than above-mentioned maximum rotation value, is then upgraded above-mentioned maximum rotation value with above-mentioned present rotation value.
15. method according to claim 12 is characterized in that, if above-mentioned present rotation value less than above-mentioned minimum rotation value, is then upgraded above-mentioned minimum rotation value with above-mentioned present rotation value.
16. method according to claim 12 is characterized in that, utilizes above-mentioned maximum rotation value to deduct above-mentioned minimum rotation value and whether less than default peak peak value is judged whether above-mentioned hand-held indicator device is static.
17. method according to claim 12 is characterized in that, upgrades the gyrostatic static reference voltage of above-mentioned quartzy piezoelectric type according to following equation:
Wstatic＝Wsum/N+Wstatic_org
Wherein Wstatic represents new static reference voltage value, Wsum representative rotation accumulated value, N represents pre-set count values, above-mentioned pre-set count values is the above-mentioned Preset Time of representative relatively, the representative of above-mentioned rotation accumulated value will be rotated the value of the being with resultant result that adds up each time, and Wstatic_org represents the static reference voltage value in the mnemon that is stored in above-mentioned hand-held indicator device at present.
18. method according to claim 17 is characterized in that, if above-mentioned hand-held indicator device is kept static counting greater than above-mentioned pre-set count values, just upgrades the gyrostatic static reference voltage of above-mentioned quartzy piezoelectric type.
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| CN102410845B (en) * | 2011-08-16 | 2014-09-10 | 江苏惠通集团有限责任公司 | Method and device for correcting error, detecting angular speed and controlling mouse, and space mouse |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6777857B1 (en) * | 1999-03-18 | 2004-08-17 | Board Of Regents Of The University Of Nebraska | Piezoelectric gyroscope system, and method of use |
| CN1763477A (en) * | 2005-11-04 | 2006-04-26 | 北京航空航天大学 | Mixed calibration method for Inertial measurement unit capable of eliminating gyro constant drift |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6777857B1 (en) * | 1999-03-18 | 2004-08-17 | Board Of Regents Of The University Of Nebraska | Piezoelectric gyroscope system, and method of use |
| CN1763477A (en) * | 2005-11-04 | 2006-04-26 | 北京航空航天大学 | Mixed calibration method for Inertial measurement unit capable of eliminating gyro constant drift |
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