CN1228735C - Electromagnetic induction system with multipl antenna loop layout and no-battery pointer equipment and its coordinate positioning method - Google Patents
Electromagnetic induction system with multipl antenna loop layout and no-battery pointer equipment and its coordinate positioning method Download PDFInfo
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Abstract
The present invention relates to a layout for multiple antenna circuits for an electromagnetic induction system, which comprises a plurality of antenna circuits, wherein one end of each antenna circuit is respectively connected with an antenna switch, and the other end of each antenna circuit is connected with a common joint; each antenna circuit is a relatively closed antenna circuit, wherein the relatively closed antenna circuit has a plurality of n-shaped sections to form a sawtoothed area, and the n-shaped sections are mutually and correspondingly closed to form a plurality of analogous closed areas; thus, the layout of multiple antenna circuits is formed further by using the form.
Description
Technical field
The present invention relates to a kind of multiple antenna loop configuration of EM induction system, particularly relate to a kind of coordinate positioning method of multiple antenna loop configuration of EM induction system.
Background technology
Because hand-written input circuit equipment can replace mouse, and more is fit to allow the user carry out the input of literal and pattern in the mode of artificial input than mouse, so the improvement of hand-written input circuit equipment is the field of sharply developing in recent years.Early stage hand-written input circuit equipment is to replace mouse with pen; and in order to promote the user at operational convenience; usually with wireless indicator equipment (pen, mouse, positioning disk .... or the like) the two replaces mouse with digiboard (tablet), wherein the nib of wireless pen usually can be corresponding with the left button of mouse.Though traditional pen type input product is gone for many years, yet like product all only biases toward in the application of simple functions such as drawing or input in Chinese.
Traditional EM induction system has the transducer/pointing device of a digiboard and a mouse or pen type.Generally speaking, on the surface of digiboard, determine the position of a described point that two kinds of patterns are arranged: one is relative pattern, and another is an absolute mode.General mouse device is with relative mode operating, when mouse slides on the digiboard surface, computer system can receive the input from mouse, it only can this mouse of identification relatively moving on X and Y direction, a kind of general technology is to utilize a sensing apparatus in this mouse, forming a pair of mutually perpendicular conversion signal, this is vertically corresponding with horizontal mobile phase to signal and this mouse.Relatively, the cursor device in the digiboard, for example, wireless indicator equipment generally is to operate under absolute mode.If mention this cursor device, and move on the another location on its digiboard surface, for this computer system, signal can change to react a new absolute position of this cursor device.Now, existing several different methods is with deciding this cursor device in the lip-deep position of the digiboard of its support, and wherein, the electromagnetic field inducing technology is a kind of technology that is widely used in absolute mode.Early stage transducer/pointing device is to be connected to digiboard by multiconductor cable, is sent in the computer system via the information of computing machine transport interface with position and button/pressure again.Wireless type transducer/pointing device in some conventional art, once represented the non-orientation state of transducer/pointing device function by the mode of frequency of utilization and/or phase change, these functions have: the button of pressing, the pressure of pointing device, or similar function etc.Yet if there is not scrupulous processing, the change of frequency and phase place is easily because multiple external factor, as metal, noise, external electromagnetic field .... or the like, and then cause erroneous judgement on the pointing device function.Particularly in bigger digiboard, it is obvious more that these problems become.The improving technology of traditional digiboard system allows the user to use described point equipment with double mode function mode, therefore can provide to relatively move or the information of absolute position under user's control.
Existing pointing device formula input product is generally a kind of electromagnetic induction circuit arrangement.Electromagnetic induction device comprises an electromagnetism pointing device (electromagnetic pointer) and a digiboard (digitizer tablet usually; Be called for short tablet later on).Have the energy of a battery in the electromagnetism pointing device, and have a concussion circuit in the electromagnetism pointing device with the relevant electromagnetic riveting machine signal of supply emission.With the electromagnetism pointing device is example, when touching the nib of pointing device, will produce the variation of inductance value, thus make the concussion frequency also with change.The variation of the big more then inductance value of pressure that presses the pointing device tip is big more, thereby the variable quantity of concussion frequency is big more, so by the variation size of frequency, just know the size that puts on the pointing device tip pressure.Two switch keys are also arranged on the side of wireless indicator equipment, by the joint of button/leave the specific capacitor that makes in the oscillator participate in/not participate in vibration, thereby change the transmission frequency of pointing device, by the difference of frequency, can predict why button of switch key that the user presses.In addition, digiboard (tablet) has also comprised detecting loop (detective loop), amplifier (amplifier), analog-digital converter (Analog to Digital Converter; Assembly such as ADC).The zone is write by the central authorities of the handwriting pad of this quasi-tradition, is formed for weaving by loop inductance, in this zone, with the two-sided layout of circuit board and use two axially with the equidistant antenna loops of arranging of array mode.The main application of this antenna loop only is to receive the electromagnetic riveting machine signal that the special electromagnetic pointing device is launched.When electromagnetism pointing device emission electromagnetic riveting machine signal, antenna loop will receive this electromagnetic riveting machine signal, and via the processing of circuit, and obtain the pointing device relevant information.
Generally speaking, the antenna loop of traditional electromagnetic induction device and topological design thereof are that antenna loop equidistantly is arranged in grid network with X, Y-axis array, draw its absolute coordinates with inductive electromagnetic pointing device and calculating.With reference to the antenna loop configuration shown in Figure 1A along the configuration of the directions X of two-dimensional quadrature coordinate (two-dimension orthogonal coordinates), every day, the end of line loop 110A connected a switch (X1 to X25) respectively, and its other end is total to contact 105A with a ground wire respectively and is connected, in view of the above, the signal that every day, line loop 110A was responded to can obtain via the control in proper order to switch X1 to X25.Because magnetic field intensity and square distance are inversely proportional to, the electromagnetism pointing device of launching electromagnetic field when far away more, can make that the received signal of antenna loop is faint more apart from antenna; Relatively, the electromagnetism pointing device of emission electromagnetic field when near more, can make that the received signal of antenna is strong more apart from antenna.Therefore,, and analyze the received signal power of each antenna loop, be positioned at the scope of that strip antenna just can learn the electromagnetism pointing device, and then calculate its position coordinates as long as allow the microprocessor all antenna loops of P-SCAN one by one of digiboard.Yet, for large-area digiboard, the antenna loop quantity of its layout also with increase, so need more duplexer.
On the other hand, information products are handled with how H.D direction towards two-forty and are developed now, yet when processing speed is fast more, the easy more phenomenon of supervening electromagnetic interference (EMI).Usually in the specific occasion of using digiboard, often be accompanied by the existence of out of Memory digital product around it, therefore traditional digiboard is subject to the interference of external electromagnetic field, thereby easily produces erroneous judgement.Required have for the large-area digiboard for commercial, the quantity of its antenna arrangement with increase, this certainly will increase a large amount of duplexers.Shown in Figure 1B, it is traditional antenna loop configuration, in traditional antenna arrangement, the antenna arrangement of X-axis and Y-axis is connected to ground wire contact 105A and 105B altogether respectively, and the configuration of antenna loop 110A and 110B, intend to exceed the scope of earth point 105A and 105B in order to form like enclosed areas.Therefore, traditional digiboard must be reserved borderline region (space bounded) 170, exceed the antenna loop 110A of common contact 105A and 105B and the start lead of 110B with storing, the restriction that this causes the board area downsizing of handwriting pad causes being difficult to make the panel with undersized borderline region.In view of this, the invention provides a kind of multiple antenna loop configuration of EM induction system, to solve above-mentioned defective.
Summary of the invention
In above-mentioned background of invention, in order to strengthen and increase the function of the antenna loop of traditional electromagnetic induction device, overcome the deficiencies in the prior art and defective, the invention provides a kind of have no battery pointing device (pen, mouse, positioning disk .... or the like) the multiple antenna loop configuration and the coordinate location method thereof of EM induction system, can be in order to solve the shortcoming of above-mentioned traditional electromagnetic induction device.
One of fundamental purpose of the present invention provides a kind of EM induction system and coordinate setting program thereof with no battery pointing device and multiple antenna loop configuration.The present invention carries out a coordinate setting program by a no battery pointing device and a multiple antenna loop configuration.In addition, no battery pointing device of the present invention has a variable inductance assembly, when the inductance value of this variable inductance changes, its resonant frequency also with change, so the electromagnetic riveting machine signal frequency of antenna loop reception is also with difference.By this multiple antenna loop configuration, the present invention can reduce the space requirement of EM induction system and the area of circuit board (not limiting at this is rigid or soft circuit board) thereof, with the purpose that reaches reduction product appearance marginal dimension with reduce production costs, and strengthen the usefulness of EM induction system.Therefore, the present invention can meet economically benefit and the usability on the industry.
For reaching above-mentioned purpose, the invention provides a kind of EM induction system, it comprises:
One no battery pointing device, this no battery pointing device can receive one first electromagnetic riveting machine signal, and by the electromagnetic induction store electrical energy so that launch one second electromagnetic riveting machine signal;
One antenna loop secondary circuit, this antenna loop secondary circuit has a multiple antenna loop configuration, and above-mentioned antenna loop secondary circuit can be launched above-mentioned first electromagnetic riveting machine signal and receive above-mentioned second electromagnetic riveting machine signal, wherein above-mentioned multiple antenna loop configuration comprises many entity antenna loops, one end of above-mentioned many entity antenna loops and a plurality of duplexer group electrical couplings, and the other end of above-mentioned many entity antenna loops and wiring electrical couplings altogether, and every above-mentioned entity antenna loop has a plurality of ㄇ shape sections;
One inner secondary circuit, this inside secondary circuit and above-mentioned antenna loop secondary circuit electrical couplings are with transmission and handle above-mentioned first electromagnetic riveting machine signal and above-mentioned second electromagnetic riveting machine signal; With
One little processing secondary circuit, this little processing secondary circuit and above-mentioned inner secondary circuit electrical couplings and control above-mentioned antenna loop secondary circuit.
For reaching above-mentioned purpose, the present invention also provides a kind of coordinate positioning method with EM induction system of no battery pointing device, and it comprises:
Carry out a universe scanning sequence so that launch one first electromagnetic riveting machine signal by many entity antenna loops;
Receive above-mentioned first electromagnetic riveting machine signal and launch one second electromagnetic riveting machine signal by above-mentioned no battery pointing device and receive above-mentioned second electromagnetic riveting machine signal so that be positioned at above-mentioned many entity antenna loops of the part of this no battery pointing device position;
Transmit the little processing secondary circuit of this second electromagnetic riveting machine signal to;
Go out to have an entity antenna loop address of maximum voltage signal with correspondence by the antenna loop allocation list in above-mentioned little processing secondary circuit;
By above-mentioned entity antenna loop address is that a sector scanning program is carried out with at least three above-mentioned entity antenna loops of scanning in the center, and obtains at least three voltage signals; With
Determining the logical address at above-mentioned no battery pointing device place, and calculate its coordinate by above-mentioned at least three voltage signals and above-mentioned antenna loop allocation list.
Multiple antenna loop configuration of the present invention comprises a multiple antenna loop group, and it is configured according to an antenna loop allocation list.Antenna loop configuration in the antenna loop allocation list comprises many entity antenna loops (physical antenna loop), a plurality of entity antenna loops distribute along the X-axis and the Y direction of two-dimensional quadrature coordinate (two-dimensional orthogonal coordinates) respectively, wherein, each entity antenna loop comprises a plurality of logical antennas loop at least.For each entity antenna loop according to equidirectional distribution, the logical antenna loop adjacent with each both sides, logical antenna loop belongs to different entity antenna loops respectively.In addition, the scanning sequency of antenna loop is by an antenna loop allocation list P-SCAN that designs in microprocessor.At first, each duplexer will be opened body antenna loop in fact according to the time-division preface, so that the emission electromagnetic riveting machine signal.When no battery pointing device was positioned at the scope of multiple antenna loop configuration, no battery pointing device was by the mode receiving entity antenna loop institute electromagnetic energy emitted of electromagnetic induction.After no battery pointing device received energy and energy storage, the bilateral antenna switch of entity antenna loop stops emitted energy and begins to receive the energy that no battery pointing device is launched.On the other hand, the coordinate setting program of the no battery pointing device of EM induction system comprises the universe scanning and the sector scanning program thereof of directions X and Y direction, have the 3rd signal that time second signal and of big voltage has the third-largest voltage so that detect first signal, with maximum voltage in regular turn, and draw the coordinate position of accurate no battery pointing device via the calculating of processing of EM induction system internal circuit and microprocessor.
Description of drawings
Figure 1A is depicted as the antenna loop configuration of traditional EM induction system at the axial synoptic diagram of x;
Figure 1B is depicted as the antenna loop configuration synoptic diagram of traditional EM induction system;
Fig. 2 is according in first preferred embodiment of the present invention, the multiple antenna loop synoptic diagram of EM induction system (synoptic diagram of a certain entity antenna loop only being shown at this);
Fig. 3 is according in second preferred embodiment of the present invention, the multiple antenna loop configuration synoptic diagram of EM induction system;
Fig. 4 A is depicted as according in the 3rd preferred embodiment of the present invention, the circuit diagram of EM induction system;
Fig. 4 B is depicted as according in the 3rd preferred embodiment of the present invention, the multiple antenna loop configuration synoptic diagram of EM induction system;
Fig. 4 C is depicted as according in the 3rd preferred embodiment of the present invention, the loop configuration table of EM induction system;
Fig. 4 D is depicted as according in the 3rd preferred embodiment of the present invention, the neighboar lists of EM induction system.
Symbol description among the figure
The 105A ground wire is contact altogether
The 105B ground wire is contact altogether
The 110A antenna loop
The 110B antenna loop
The duplexer of X1-X25 X-axis
The duplexer of X1-X9 X-axis
The duplexer of XA-XC X-axis
170 borderline regions
200 multiple antenna loops (only being the synoptic diagram of line loop some day)
210 duplexers corresponding with the entity antenna loop
220 are total to contact
230A the one ㄇ shape section
230B the 2nd ㄇ shape section
230C the 3rd ㄇ shape section
240A the 4th ㄇ shape section
240B the 5th ㄇ shape section
240C the 6th ㄇ shape section
250A intends like the closed region
250B intends like the closed region
250C intends like the closed region
260A first indented region
260B second indented region
The multiple entity antenna loop of X1-XC X-axis
The multiple antenna loop configuration of 300 X-axis
310 logic blocks (only comprising several logical antenna loops)
320 are total to contact
330 duplexers
310A ㄇ shape section
310B ㄇ shape section
310C ㄇ shape section
310D ㄇ shape section
310E ㄇ shape section
310F ㄇ shape section
The spacing of the Different Logic antenna loop of the same entity antenna loop of L
The 400A EM induction system
400B does not have the battery pointing device
405 antenna secondary circuits
410 internal circuits
415 little processing secondary circuits
420 filtering and amplification secondary circuit
425 primes are amplified secondary circuit
430 waveform integer secondary circuits
435 frequencies-voltage transitions secondary circuit
440 multiple antenna loop configurations
445 duplexer groups
445A bilateral antenna switch
450 entity antenna loops
450A entity antenna loop
450B entity antenna loop
The 1-41 logical address
Embodiment
The present invention is a kind of coordinate positioning method with EM induction system of multiple antenna loop configuration and no battery pointing device in this direction of inquiring into.In order to understand the present invention up hill and dale, detailed fabrication steps or construction package will be proposed in following description.Apparently, execution of the present invention is not defined in the specific details that engineering technical personnel were familiar with of EM induction system.On the other hand, well-known assembly and program are not described in the details, with the restriction of avoiding causing the present invention unnecessary.Preferred embodiment meeting of the present invention is described in detail as follows, yet except these detailed descriptions, the present invention can also implement in other embodiments widely, and scope of the present invention do not limited, and its scope with claims is as the criterion.
With reference to shown in Figure 2, in the first embodiment of the present invention, at first provide a multiple antenna loop 200, wherein, an end of multiple antenna loop 200 and a duplexer 210 electrical couplings, and the other end of multiple antenna loop 200 with have contact 220 electrical couplings altogether.Multiple antenna loop 200 comprises a plurality of ㄇ shape sections, for example, the one ㄇ shape section 230A, the 2nd ㄇ shape section 230B, the 3rd ㄇ shape section 230C and the 4th ㄇ shape section 240A, the 5th ㄇ shape section 240B, the 6th ㄇ shape section 240C, and a plurality of ㄇ shape section 230A to 230C form one first indented region 260A, and a plurality of ㄇ shape section 240A to 240C forms one second indented region 260B; The second indented region 260B forms a relative closed type antenna loop with the first indented region 260A, and wherein, each ㄇ shape section 230A to 230C is relative with each ㄇ shape section 240A to 240C respectively, intends like closed region 250A to 250C to form respectively.This multiple antenna loop is an entity antenna loop, the plan that wherein forms 250A, 250B and 250C is like the employed wire loop in closed region, be a plurality of logical antennas loop, that is one the entity antenna loop will comprise a plurality of logical antennas loop, this promptly is that present technique is called the reason of " multiple antenna loop ".
With reference to shown in Figure 3, in the second embodiment of the present invention, one multiple antenna loop configuration 300 (X-axis only is shown) with many entity antenna loops (X1-X9 and XA to XC) is provided, wherein, every entity antenna loop (X1-X9 and XA to XC) is along the direction configuration of the X-axis of quadrature two-dimensional coordinate (two-dimensional orthogonal coordinates), and it is made up of a plurality of logical antennas loop 310 respectively, and logical antenna loop 310 is consistent in essence ㄇ shape section; And, every multiple antenna loop (X1-X9 and XA to XC) respectively with corresponding duplexer 330 electrical couplings, and its other end all with contact 320 electrical couplings altogether.For each multiple entity antenna loop (X1-X9 and XA to XC) that is arranged in equidirectional, different antenna loop (X1-X9 and XA to XC) is adhered in other logical antenna loop that each logical antenna loop 310 is adjacent separately, so can tell pointing device and be arranged on which logical antenna loop of antenna loop.For example, the ㄇ shape logical antenna loop 310A of entity antenna loop X5, the ㄇ shape logical antenna loop 310C and the 310D in other logical antenna loop that it is adjacent, it belongs to entity antenna loop X4 and X6.In addition, another ㄇ shape logical antenna loop 310B of entity antenna loop X5, the ㄇ shape logical antenna loop 310E and the 310F in other logical antenna loop that it is adjacent, it belongs to entity antenna loop X2 and X12.Therefore, when the position of pointing device is positioned at the ㄇ shape section 310A of entity antenna loop X5 or 310B, produce the size of sensor signal voltage by the pairing entity antenna loop of reference entity antenna loop X5 and adjacent logical antenna loop thereof X4, X6, X2, X12, the position that can tell pointing device be arranged in entity antenna loop X5 ㄇ shape logical antenna loop 310A or be on the 310B.In addition, must be noted that two adjacent logical antenna loops in the same entity antenna loop between distance must be suitably (for example: the distance L between two adjacent ㄇ shape logical antenna loop 310A among the entity antenna loop X5 and 310B); If spacing L is too little, then when the position of decision pointing device, easily cause the result of erroneous judgement.
Shown in figure 4A, in the third embodiment of the present invention, one EM induction system 400A at first is provided, the pointing device of EM induction system 400A is a no battery pointing device 400B, wherein, no battery pointing device 400B has an induction tank circuit, and induction tank circuit more comprises a variable inductance.EM induction system 400A comprises: an antenna secondary circuit 405, an internal circuit 410 and a little processing secondary circuit 415, wherein, internal circuit 410 more comprises a filtering and amplifies secondary circuit 420, a prime amplification secondary circuit 425, a waveform integer secondary circuit 430 and one frequency-voltage transitions secondary circuit 435, and antenna secondary circuit 405 comprises a multiple antenna loop configuration 440 and a duplexer group 445.Multiple antenna loop configuration 440 comprises many entity antenna loops 450, and many entity antenna loops 450 respectively with a plurality of bilateral antenna switch 445A electrical couplings of duplexer group 445, wherein, secondary circuit 425 electrical couplings are amplified with prime respectively by duplexer group 445, and are controlled by little processing secondary circuit 415.In addition, prime is amplified secondary circuit 425 also respectively with filtering and amplify secondary circuit 420 electrical couplings, and also be controlled by little processing secondary circuit 415, wherein, filtering and amplify secondary circuit 420 respectively with waveform integer secondary circuit 430 and frequency-voltage transitions secondary circuit 435 electrical couplings, and waveform integer secondary circuit 430 and frequency-voltage transitions secondary circuit 435 respectively with little processing secondary circuit 415 electrical couplings.After many entity antenna loops 450 receive signal, receive signal and will be sent in the prime amplification secondary circuit 425, to amplify signal; Then, the signal after 425 transmission of prime amplification secondary circuit are amplified is to filtering and amplify secondary circuit 420, with the noise and the amplification again of filtering unnecessary frequency band; After, filtering and amplify secondary circuit 420 signal is transferred in waveform integer secondary circuit 430 and the frequency-voltage transitions secondary circuit 435, the frequency message that has the signal of specific waveforms and change signal with generation becomes voltage signal; At last, the signal and the voltage signal that will have specific waveforms again transfer to respectively in little processing secondary circuit 415, differentiate with the message of carrying out coordinate computation and non-orientation.
Shown in figure 4B, in the present embodiment, many entity antenna loop 450A of multiple antenna loop configuration 440 and 450B are respectively along the direction configuration of the X-axis and the Y-axis of two-dimensional quadrature coordinate, and the end of many entity antenna loop 450A and 450B respectively with identical contact 455 electrical couplings altogether, and the other end of many entity antenna loop 450A and 450B respectively with a plurality of bilateral antenna switch 445A electrical couplings of duplexer group 445, wherein, many entity antenna loop 450A all are connected to form by consistent in essence a plurality of ㄇ shape sections with 450B.Aforementioned multiple antenna loop configuration 440 is shown in the antenna loop allocation list of Fig. 4 C, wherein, antenna loop allocation list (as Fig. 4 C) can design in little processing secondary circuit 415, and the antenna loop allocation list comprises a neighboar lists (as Fig. 4 C), neighboar lists point out the entity antenna loop 450A that differs from one another or 450B with corresponding logical antenna loop between neighbouring relations.In addition, the position of each entity antenna loop has an entity antenna address (X1 to X9 and XA to XC), and the position of each logic block has a logical address (1 to 41), wherein, the entity antenna loop in adjacent logical antenna loop is not reproducible, for example with entity loop XC, its logical antenna loop is 13,14,15, it is respectively to belong to entity antenna loop X3, XC, X5, is 23 and belong to entity antenna loop XC together in the logical antenna loop of another section, 24,25, entity antenna loop under it is XB, XC, X1, therefore aforesaid X3, (because of only occurring once) both no longer appearred in X5.
As mentioned above, EM induction system 400A can locate the position of its no battery pointing device 400B by its antenna loop allocation list.The method of detecting no battery pointing device 400B is as follows: at first, after EM induction system 400A activates, signal is selected according to the switch that little processing secondary circuit 415 is sent by duplexer group 445, and in mode according to the time-division preface, the bilateral antenna switch 445A of every entity antenna loop 450A of On/Off directions X and Y direction and 450B one by one, and carry out a universe scanning sequence, its method is that the entity antenna loop sends electromagnetic riveting machine signal, when no battery pointing device 400B when the multiple antenna loop configuration 440, no battery pointing device 400B can respond to the reception electromagnetic riveting machine signal, wherein, open bilateral antenna switch 445A and begin to launch electromagnetic riveting machine signal to not having battery pointing device 400B to carry out the time of energy storage, inner setting value by little processing secondary circuit 415 is determined that this time must be enough to make the energy storage of no battery pointing device to reach state of saturation.After no battery pointing device 400B energy storage was finished, because of antenna loop is no longer launched electromagnetic riveting machine signal, do not have the battery pointing device and will launch electromagnetic riveting machine signal again to many entity antenna loops of its position this moment.
In the implementation process of reality, then be earlier through a universe scanning sequence, find out the rough logical address of pointing device after, rough according to this again logical address is carried out sector scanning.Aforementioned so-called " universe scanning sequence " is: at first, in very first time interval, the unlatching (" ON ") that to open up via the pairing antenna of article one entity antenna loop, radiating circuit is connected electrically with the entity antenna loop, and in this time interval, the emission electromagnetic riveting machine signal is to proximity space; Secondly, in another the time at interval in, stop to launch electromagnetic riveting machine signal, do not close duplexer, and respond to the electromagnetic field that receives proximity space by antenna loop simultaneously; And then, via preamplifying circuit 425, filtering and amplifying circuit 420.... processing and computing to little processing secondary circuit 415, draw a value strong and weak relevant, and this value record is placed the random access memory (RAM) of little processing secondary circuit 415 with sensor signal; Following, is the object of effect with second entity antenna loop again, carries out aforesaid program; Follow again, the size of the value that contrast is strong and weak relevant with sensor signal, and note down its relation; Then, repeat identical program, after all entity antenna loops are all implemented; Then, seek in the record whether maximal value is arranged, when if maximal value is arranged, then carry out correspondence according to the antenna loop allocation list, and after finding out several relevant entity antenna loops, prepare again to carry out " sector scanning ", if when not having maximal value, then repeat aforesaid " universe scanning sequence " again, directly till the maximizing.
Next then be explanation " sector scanning program ": having peaked entity antenna loop in a time interval, to launch electromagnetic riveting machine signal to proximity space; Again in another time interval by having peaked logical antenna loop and the contiguous pairing entity antenna loop in many logical antenna loops (including peaked logical antenna loop) thereof to respond to reception, and note down each and be worth in little processing secondary circuit 415; Again and then, arrange and find out maximum signal, inferior big signal, inferior big signal .... or the like, what divide another name is one first signal, one second signal and one the 3rd signal .... or the like, wherein, the voltage of first signal is approximately more than or equal to the voltage of second signal, and the voltage of second signal is approximately more than or equal to the voltage of the 3rd signal; At last, calculate exact value with the linear ratio relation according to first three big signal, and contrast has peaked entity antenna and whether changes, to follow the trail of the motion track of pointing device.In general, little processing secondary circuit 415 is according to five voltage signals, and the logical address of following the trail of and determining no battery pointing device place by the antenna loop allocation list, and calculates its coordinate place.
In the above embodiments of the present invention, each bar entity antenna loop can form a ㄇ shape logical antenna loop again after multi-turn, the intensity of first electromagnetic riveting machine signal that the entity antenna loop launched is increased, and then the energy storage benefit of no battery pointing device is significantly improved, thereby make the intensity of second electromagnetic riveting machine signal that it is launched also can increase and reduce the time of energy storage, also make the voltage amplitude ability of second electromagnetic riveting machine signal that the entity antenna loop is received increase simultaneously.So use each bar entity antenna loop after multi-turn, the ㄇ shape logical antenna loop that forms, can improve the voltage signal intensity of this multiple antenna loop configuration, use digiboard of the present invention to have splendid noise resisting ability, make the degree of stability of system significantly promote.The entity antenna loop of the embodiment of the invention does not limit and has only 12 in addition, and it can have the design of different antennae feeder number purpose according to actual application.
As mentioned above, the present invention carries out a coordinate setting program by a no battery pointing device and a multiple antenna loop configuration.In addition, no battery pointing device of the present invention has a variable inductance assembly, when the inductance value of this variable inductance changes, its resonant frequency also with change, so the electromagnetic riveting machine signal frequency that the no battery pointing device of antenna loop reception is launched is also with difference.Layout by this multiple antenna loop, the present invention can reduce the space requirement of EM induction system and the area of circuit board (not limiting is rigid or soft circuit board) thereof, with the purpose that reaches reduction product appearance marginal dimension with reduce production costs, and strengthen the usefulness of EM induction system.Therefore, the present invention can meet economically benefit and the usability on the industry.
Certainly, the present invention is except on the multiple antenna loop configuration that may be applied in the EM induction system with no battery pointing device, also may be used in any coordinate location method with multiple antenna loop configuration.And the present invention carries out the coordinate setting program by no battery pointing device and multiple antenna loop configuration, and development is used in about the EM induction system aspect not yet so far.
Apparently, according to the description among the top embodiment, the present invention has many corrections and difference.Therefore need be understood in the scope of its additional claim item, except above-mentioned detailed description, the present invention can also implement widely in other embodiments.
Above-mentioned is preferred embodiment of the present invention only, is not in order to limit protection scope of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the scope of claims.
Claims (9)
1. EM induction system is characterized in that it comprises:
One no battery pointing device, this no battery pointing device can receive one first electromagnetic riveting machine signal, and by the electromagnetic induction store electrical energy so that launch one second electromagnetic riveting machine signal;
One antenna loop secondary circuit, this antenna loop secondary circuit has a multiple antenna loop configuration, and above-mentioned antenna loop secondary circuit can be launched above-mentioned first electromagnetic riveting machine signal and receive above-mentioned second electromagnetic riveting machine signal, wherein above-mentioned multiple antenna loop configuration comprises many entity antenna loops, one end of above-mentioned many entity antenna loops and a plurality of duplexer group electrical couplings, and the other end of above-mentioned many entity antenna loops and wiring electrical couplings altogether, and every above-mentioned entity antenna loop has a plurality of ㄇ shape sections;
One inner secondary circuit, this inside secondary circuit and above-mentioned antenna loop secondary circuit electrical couplings are with transmission and handle above-mentioned first electromagnetic riveting machine signal and above-mentioned second electromagnetic riveting machine signal; With
One little processing secondary circuit, this little processing secondary circuit and above-mentioned inner secondary circuit electrical couplings and control above-mentioned antenna loop secondary circuit.
2. EM induction system as claimed in claim 1 is characterized in that, above-mentioned no battery pointing device comprises an induction energy storage secondary circuit.
3. EM induction system as claimed in claim 2 is characterized in that, above-mentioned induction energy storage secondary circuit more comprises a variable inductance.
4. EM induction system as claimed in claim 1, it is characterized in that, every above-mentioned entity antenna loop is interconnected to form by above-mentioned a plurality of ㄇ shape sections, wherein, a plurality of above-mentioned ㄇ shape sections form a plan like the closed region, and each this plan is a logical antenna loop like the closed region.
5. EM induction system as claimed in claim 4 is characterized in that, the above-mentioned ㄇ shape section of each of every above-mentioned above-mentioned entity antenna loop is to use many winding modes to form.
6. coordinate positioning method with EM induction system of no battery pointing device is characterized in that it comprises:
Carry out a universe scanning sequence so that launch one first electromagnetic riveting machine signal by many entity antenna loops;
Receive above-mentioned first electromagnetic riveting machine signal and launch one second electromagnetic riveting machine signal by above-mentioned no battery pointing device and receive above-mentioned second electromagnetic riveting machine signal so that be positioned at above-mentioned many entity antenna loops of the part of this no battery pointing device position;
Transmit the little processing secondary circuit of this second electromagnetic riveting machine signal to;
Go out to have an entity antenna loop address of maximum voltage signal with correspondence by the antenna loop allocation list in above-mentioned little processing secondary circuit;
By above-mentioned entity antenna loop address is that a sector scanning program is carried out with at least three above-mentioned entity antenna loops of scanning in the center, and obtains at least three voltage signals; With
Determining the logical address at above-mentioned no battery pointing device place, and calculate its coordinate by above-mentioned at least three voltage signals and above-mentioned antenna loop allocation list.
7. the coordinate positioning method with EM induction system of no battery pointing device as claimed in claim 6, it is characterized in that, every above-mentioned entity antenna loop more comprises a plurality of plans like the closed region, and each this plan is a logical antenna loop like the closed region.
8. the coordinate positioning method with EM induction system of no battery pointing device as claimed in claim 7, it is characterized in that each above-mentioned logical antenna loop is adjacent other each above-mentioned logical antenna loop of both sides and adheres to every different above-mentioned entity antenna loops separately.
9. the coordinate positioning method with EM induction system of no battery pointing device as claimed in claim 6, it is characterized in that, above-mentioned antenna loop allocation list more comprises a plurality of antennas address, and above-mentioned a plurality of antennas address is the position of above-mentioned many entity antenna loops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128512 CN1228735C (en) | 2002-08-09 | 2002-08-09 | Electromagnetic induction system with multipl antenna loop layout and no-battery pointer equipment and its coordinate positioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128512 CN1228735C (en) | 2002-08-09 | 2002-08-09 | Electromagnetic induction system with multipl antenna loop layout and no-battery pointer equipment and its coordinate positioning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1474352A CN1474352A (en) | 2004-02-11 |
| CN1228735C true CN1228735C (en) | 2005-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02128512 Expired - Lifetime CN1228735C (en) | 2002-08-09 | 2002-08-09 | Electromagnetic induction system with multipl antenna loop layout and no-battery pointer equipment and its coordinate positioning method |
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| Country | Link |
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| CN (1) | CN1228735C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650921A (en) * | 2011-02-25 | 2012-08-29 | 太瀚科技股份有限公司 | Electromagnetic induction system and antenna circuit layout method thereof |
| CN102662523B (en) * | 2012-04-20 | 2015-06-10 | 深圳市绘王动漫科技有限公司 | Antenna arrangement method for passive wireless hand drawing board |
| CN107491235B (en) * | 2017-07-06 | 2020-09-11 | 深圳汉王友基科技有限公司 | Hand-drawing board and antenna arrangement method thereof |
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2002
- 2002-08-09 CN CN 02128512 patent/CN1228735C/en not_active Expired - Lifetime
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| CN1474352A (en) | 2004-02-11 |
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