[summary of the invention]
Based on this, be necessary to provide a kind of cursor control device and method that need not operating of contacts.
A kind of cursor control device comprises transmitter, receiver, computing module and modular converter,
Said transmitter is used to launch ultra-wideband radar signal;
Said receiver has two at least, and distributed and arranged with the equidistant position of said transmitter, be used to receive said ultra-wideband radar signal;
Said computing module is used for receiving the mistiming of said ultra-wideband radar signal and the distance of said transmitter and said receiver according to the said receiver of difference, calculates the position coordinates of target object;
Said modular converter is used for the position coordinates variation of said target object is converted into moving of cursor of mouse and clicks control signal.
In a preferred embodiment, said receiver has two, be distributed in the both sides of said transmitter respectively, and the three point-blank.
In a preferred embodiment, said computing module through following system of equations calculate target object position coordinates (x, y):
Wherein R1 and R2 are the distance of target object and said receiver, and d is the distance of said transmitter and said receiver.
In a preferred embodiment, said modular converter is used for moving of mouse beacon cursor through the direction and the speed of the variation judgement target object paddling of x; Reach pre-set threshold value through y is mobile in the given time, then think the click action.
In a preferred embodiment, said receiver has four, and is distributed in four equidistant positions all around of said transmitter.
A kind of cursor control method comprises the steps:
A ultra-wideband radar signal transmitter is set;
At least two and the equidistant radar signal receiver of said transmitter are set;
Said transmitter emission ultra-wideband radar signal;
Said receiver receives said ultra-wideband radar signal;
Receive the mistiming of said ultra-wideband radar signal and the distance of said transmitter and said receiver according to the said receiver of difference, calculate the position coordinates of target object;
The position coordinates variation of said target object is converted into moving of cursor of mouse and clicks control signal.
In a preferred embodiment, said receiver has two, be distributed in the both sides of said transmitter respectively, and the three point-blank.
In a preferred embodiment, the position coordinates of said target object calculates through following system of equations:
Wherein R1 and R2 are the distance of target object and said receiver, and d is the distance of said transmitter and said receiver, calculate target object position coordinates (x, y).
In a preferred embodiment, it is to judge the direction and the speed of target object paddling through the variation of x that said position coordinates with said target object changes the step that moves and click control signal that is converted into cursor of mouse, is used for moving of mouse beacon cursor; Reach pre-set threshold value through y is mobile in the given time, then think the click action.
In a preferred embodiment, said receiver has four, is distributed in four equidistant positions all around of said transmitter.
Through above-mentioned cursor control device and method; Under the situation that give a lesson in the classroom or man-machine distance is far away, just can transmitter and receiver be placed in position, realize moving and click action of non-contact type mouse beacon cursor; Neither can cause wearing and tearing, and easy to operate.
[embodiment]
In order to solve wearing and tearing and the awkward problem that conventional mouse and touch screen operation bring, a kind of cursor control device and method that need not operating of contacts proposed.
(UltrawideBand, UWB) radar fix technology is basis of the present invention to ultra broadband.Here why select for use ULTRA-WIDEBAND RADAR mainly to consider the sensitizing range appearance not of uniform size of different its demands of use scene of system.For normal radar; Its bandwidth is narrower; The resolution of radar and the relation between the bandwidth are roughly:
in the formula: B is a signal bandwidth, and c is the aerial velocity of propagation of radar signal (approximating the light velocity).It is thus clear that signal bandwidth is wide more, the resolution of radar is then high more.And under (in 1 meter) application scenarios closely; The electric wave flight time:
and will differentiate a plurality of pulses during this period; Then require pulse width to be worth, have only ultra-broadband signal can reach such requirement much smaller than this.In the zone of action about 0.5 meter, the electric wave flight time was 3.3 nanoseconds; Reserve a boundary belt to waveform, according to 50% dutycycle (otherwise can't identification signal along), then pulse width must be about 1.5 nanoseconds, and corresponding frequency span is 1.5GHz.
The radar receiving unit compares the time delay that judges whether to receive reflection wave and emission generation through direct incoming wave with transmitted wave and reception.Yet this process is not carried out immediately, but through a bit of time delay.This time delay is called as range gate.Through setting the different distances door, we can set interested distance range.Promptly through the adjustment range gate just the scalable area-of-interest apart from the distance of radar.The user can regulate this parameter according to self custom and posture, makes operation more smoothly.Such as 3 nanoseconds of time-delay can be set, the user can operate apart from 0.5 meter of radar.
Realize through range finding and direction finding usually the ULTRA-WIDEBAND RADAR location; Mainly contain: based on receiving signal intensity (RSS:Received Signal Strength), based on the angle of arrival (AOA:Angle of Arrival) with based on three kinds of methods time of arrival (TOA/TDOA:Time/Time Difference of Arrival).Wherein the TOA/TDOA method is the basis to arrive the time delay estimation theory, and the ultra-broadband signal occupied bandwidth is very big, and temporal resolution is high, thereby this method best embodies out the superiority of radio ultra wide band system.Method based on the angle of arrival belongs to direction finding technology, needs technology such as multi-antenna array or beam shaping, and the system equipment cost is higher, and its bearing accuracy depends on the estimation that arrives the wave angle degree; Then depend on the model of path loss based on the method that receives signal intensity, its precision is relevant with detection range, and to channel circumstance sensitivity, reliability is not strong.By contrast, based on the method for time of arrival, calculate the range difference of transmitting-receiving two-end through estimated signal difference time of arrival.Make full use of the characteristics of radio ultra wide band system signal high time resolution, unite the deficiency of using above-mentioned several method more can improve positioning performance or improving the locating source geometric distributions simultaneously.The general system architecture of using single-shot to overcharge in ULTRA-WIDEBAND RADAR location, i.e. emitting antenna, a plurality of receiving antennas.
As shown in Figure 1, it is the functional block diagram of the cursor control device 100 of an embodiment, comprising: transmitter 110, receiver 120, computing module 130 and modular converter 140.
Transmitter 110 is used to launch ultra-wideband radar signal.
Receiver 120 has two at least, and distributed and arranged with said transmitter 110 equidistant positions, be used to receive said ultra-wideband radar signal.
Computing module 130 is used for receiving the mistiming of said ultra-wideband radar signal and the distance of transmitter and receiver according to different receivers 120, calculates the position coordinates of target object.
Modular converter 140 is used for the position coordinates variation of target object is converted into moving of cursor of mouse and clicks control signal.
Among one embodiment, receiver 120 has two, be distributed in the both sides of transmitter 110 respectively, and the three point-blank.
Please consult Fig. 2 simultaneously, the emitting antenna of transmitter 110 is positioned at horizontal ordinate, and (x, round dot y), the receiving antenna of two receivers 120 are positioned on the X axle large circle point distance and are the both sides of d.Suppose the user through arm control, then the target object among Fig. 2 is an arm, and the distance between target object and two receiving antennas is respectively R1 and R2.
Computing module 130 can calculate through following system of equations:
Wherein R1 and R2 are the distance of target object and receiver 120, and d is the distance of transmitter 110 (emitting antenna) and receiver 120 (receiving antenna).So just can calculate target object position coordinates (x, y).Refresh the coordinates of targets position at interval with certain hour, compare the direction of motion and the speed that can obtain target.Because radar signal is directive, and in actual the use, y is the situation that negative can not occur.
Modular converter 140 can be judged the direction and the speed of target object paddling through the variation of x, is used for moving of mouse beacon cursor; Can be through y numerical value acute variation (threshold determination is set) from top to bottom, promptly y moves in the given time and reaches pre-set threshold value, then thinks the click action.Transform mode has much here, no longer enumerates here.
Among other embodiment, receiver 120 also can be three, four or more, and for the ease of calculating, four receivers 120 use more convenient.As shown in Figure 3, it is for having four receivers 120, i.e. the layout synoptic diagram of four receiving antennas.Four receiving antennas are distributed in four equidistant positions all around of emitting antenna, and emitting antenna is positioned at the coordinate round dot in other words, and four receiving antennas are separately positioned on the positive and negative XY coordinate axis.Repeat the aforementioned calculation process like this and just can obtain the Three-dimension Target movement locus, realize accurately location.Afterwards, only need movement locus is mapped on the display screen, can accomplish the function that touches input and handwriting input.Be used for moving of mouse beacon cursor as the parameter of any two coordinate axis of target object is changed, another one changes in coordinates degree is as action such as clicking or push.
Cursor control device 100 all need carry out necessary calibration operation when first the use or after using a period of time.In order to make the position of staff necessarily can be recognized by system; Earlier hand (target object) is hovered over the centre position of display screen; Whether the position of mouse icon is in the screen centre on the view screen; Whether all can be at rolling mouse behind center Screen, through the position of click action affirmation intermediate point, the position of four jiaos of each points of positioned in sequence then.To generate new configuration file after the completion, and preserve and override old configuration file, accomplish calibration.
Through above-mentioned cursor control device 100, under the situation that give a lesson in the classroom or man-machine distance is far away, just can transmitter 110 and receiver 120 be placed in position, realize moving and click action of non-contact type mouse beacon cursor.As being used in operations such as passing through gesture control PPT on the dais, effective orientation range that the operator does not leave radar signal gets final product, as not leaving the dais.Compare traditional laser locating apparatus, the bulky heaviness of laser locating apparatus can't apply on the small and exquisite embedded device.And that the mode that radar signal is provided in this case can be done is very small and exquisite, can be portable.This shows that the control mode of this case neither can cause wearing and tearing, and advantages of small volume, and is easy to operate.
As shown in Figure 4, it is the cursor control method process flow diagram of an embodiment, comprises the steps:
Step S401 is provided with a ultra-wideband radar signal transmitter.
Step S402 is provided with at least two and the equidistant radar signal receiver of transmitter.
Step S403, said transmitter emission ultra-wideband radar signal.
Step S404, said receiver receives ultra-wideband radar signal.
Step S405 receives the mistiming of said ultra-wideband radar signal and the distance of transmitter and receiver according to different receivers, calculates the position coordinates of target object.
Step S406, with the position coordinates of target object change be converted into cursor of mouse move and click control signal.
Among one embodiment, receiver has two, be distributed in the both sides of transmitter respectively, and the three point-blank.Step S405 can calculate through following system of equations:
Wherein R1 and R2 are the distance of target object and receiver, and d is the distance of transmitter and receiver.So just can calculate target object position coordinates (x, y).Refresh the coordinates of targets position at interval with certain hour, compare the direction of motion and the speed that can obtain target.Because radar signal is directive, and in actual the use, y is the situation that negative can not occur.
Step S406 can judge the direction and the speed of target object paddling through the variation of x, is used for moving of mouse beacon cursor; Can be through y numerical value acute variation (threshold determination is set) from top to bottom, promptly y moves in the given time and reaches pre-set threshold value, then thinks the click action.
Among other embodiment, receiver also can be three, four or more, and for the ease of calculating, four receivers use more convenient.Four receiving antennas are distributed in four equidistant positions all around of emitting antenna, and emitting antenna is positioned at the coordinate round dot in other words, and four receiving antennas are separately positioned on the positive and negative XY coordinate axis.Repeat the aforementioned calculation process like this and just can obtain the Three-dimension Target movement locus, realize accurately location.Afterwards, only need movement locus is mapped on the display screen, can accomplish the function that touches input and handwriting input.Be used for moving of mouse beacon cursor as the parameter of any two coordinate axis of target object is changed, another one changes in coordinates degree is as action such as clicking or push.
Through above-mentioned cursor control method, under the situation that give a lesson in the classroom or man-machine distance is far away, just can transmitter and receiver be placed in position, realize moving and click action of non-contact type mouse beacon cursor.As being used in operations such as passing through gesture control PPT on the dais, effective orientation range that the operator does not leave radar signal gets final product, as not leaving the dais.Compare traditional laser locating apparatus, the bulky heaviness of laser locating apparatus can't apply on the small and exquisite embedded device.And that the mode that radar signal is provided in this case can be done is very small and exquisite, can be portable.This shows that the control mode of this case neither can cause wearing and tearing, and advantages of small volume, and is easy to operate.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.