CN101504534A - Hand position detecting apparatus, clock and hand position detecting method - Google Patents
Hand position detecting apparatus, clock and hand position detecting method Download PDFInfo
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- CN101504534A CN101504534A CNA200910004896XA CN200910004896A CN101504534A CN 101504534 A CN101504534 A CN 101504534A CN A200910004896X A CNA200910004896X A CN A200910004896XA CN 200910004896 A CN200910004896 A CN 200910004896A CN 101504534 A CN101504534 A CN 101504534A
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Abstract
The invention relates to a pointer position detection device, a clock and a pointer position detection method. A light receiving element of a first light sensor (30a) outputs signal ''H'' or ''L'' to a controller (20) based on whether a first minute middle wheel (61) is positioned at a scheduled position, and a light receiving element of a second light sensor (30b) outputs signal ''H'' with fixed period. By using the signal ''H'' output by the second light sensor (30b) as reference, the controller (20) recognizes signal putout by the first light sensor (30a) as bit signal, and detects hour hand position corresponding to a code consisting of a plurality of continuous bit signals. A period of a signal from the second light sensor (30b) and a period of mode of the bit signal are shorter than that of the hour hand, and minimum common multiple of each period is equal to the period of the hour hand.
Description
Technical field
The present invention relates to hand position testing device, clock and watch and pointer position detection method.
Background technology
In the past, the device that detects of the known pointer that pair clock and watch etc. are arranged.The gear that this device is connected with pointer is provided with reflecting plate or through hole, and light-emitting component relatively is set with gear, according to signal, detect pointer position (with reference to patent documentation 1) from receiving the photo detector of the light of self-emission device to send via reflecting plate or through hole.
[patent documentation 1] Japanese kokai publication hei 5-209970 communique
By a plurality of reflecting plates or through hole are set like this, can detect pointer position in many places on gear.But, on the gear the reflecting plate that can be provided with or the limited amount of through hole.Therefore, detect pointer position in being difficult between short-term.
Summary of the invention
Therefore, the object of the present invention is to provide hand position testing device, clock and watch and the pointer position detection method that detects pointer position in can be between short-term.
Above-mentioned purpose can realize by following hand position testing device, this hand position testing device detects the position of the pointer that turned round by gear set by drive source, it is characterized in that this hand position testing device has: be included in the gear in the described gear set; The 1st output unit, whether its output is in the corresponding bit signal in precalculated position with described gear; The 2nd output unit, it is according to the fixed cycle output reference signal corresponding with the action of described gear set; And control module, its reference signal with described output is a benchmark, detect the position of yard corresponding described pointer that constitutes with continuous a plurality of described bit signals by described output, the cycle of the described pointer of period ratio of the cycle of described reference signal and the pattern of described bit signal is short, and the lowest common multiple in each cycle is consistent with the cycle of described pointer.
In said structure, the cycle of reference signal and the pattern cycle of bit signal are shorter than the cycle of pointer, and, the lowest common multiple in each cycle is consistent with the cycle of pointer, even therefore when the pattern cycle of the bit signal of the 1st output unit output more in short-term, also can increase the detection position of pointer.
In said structure, can adopt following structure: the quantity of the described reference signal of exporting in the bit number of exporting in the cycle of the pattern of described bit signal and the cycle at described pointer is consistent.
In said structure, can adopt following structure: the precalculated position of described gear is provided with reflecting plate or through hole, and described the 1st output unit comprises: light-emitting component, and it shines described gear; Photo detector, whether it exports and receives from the corresponding described bit signal of the light of described light-emitting component via described reflecting plate or through hole.
In said structure, can adopt following structure: described gear set comprises another gear except described gear, the precalculated position of described another gear is provided with reflecting plate or through hole, and described the 2nd output unit comprises: light-emitting component, and it shines described another gear; Photo detector, whether it in response to receives from the light of described light-emitting component via described reflecting plate or through hole and exports described reference signal.
In said structure, can adopt following structure: the described pointer as the position probing object is hour hands, and the swing circle of described gear is shorter than the swing circle of the minute wheel that is connected with minute hand.
In said structure, can adopt following structure: the described pointer as the position probing object is hour hands, and the swing circle of described another gear is longer than the swing circle of the minute wheel that is connected with minute hand.
In said structure, can adopt following structure: for described gear and described another gear swing circle separately, the former swing circle is shorter than the latter's swing circle.
And,, can provide the clock and watch that detect pointer position in can be between short-term by on clock and watch, adopting the hand position testing device of said structure.
And, above-mentioned purpose can realize by following pointer position detection method, this pointer position detection method detects the position of the pointer that turned round by gear set by drive source, it is characterized in that this pointer position detection method has following steps: whether the gear that comprises in output and the described gear set is in the corresponding bit signal in precalculated position; According to the fixed cycle output reference signal corresponding with the action of described gear set; And, reference signal with described output is a benchmark, detect the position of yard corresponding described pointer that constitutes with continuous a plurality of described bit signals by described output, the cycle of described reference signal and the pattern cycle of described bit signal are shorter than the cycle of described pointer, and the lowest common multiple in each cycle is consistent with the cycle of described pointer.
According to the present invention, can provide the hand position testing device, clock and watch and the pointer position detection method that detect pointer position in can be between short-term.
Description of drawings
Fig. 1 is the functional block diagram of structure that the electric wave correcting timepiece of present embodiment is shown.
Fig. 2 is the figure that the hardware configuration of control part is shown.
The skeleton view of the movement that Fig. 3 is on the electric wave correcting timepiece to be installed.
Fig. 4 is the cut-open view of movement.
Fig. 5 (A)～Fig. 5 (C) is the key diagram of the 1st fen breast wheel, the 2nd fen breast wheel and back gear.
Fig. 6 is the key diagram from the position relation of the signal of the 1st optical sensor and the 2nd optical sensor and pointer.
Fig. 7 illustrates the table of relation between the sign indicating number that is made of 5 successive bits signals and the moment with the signal from the 1st optical sensor as bit signal.
Fig. 8 is a pointer position corresponding tables.
Fig. 9 (A), Fig. 9 (B) are in the situation that adopts the pattern be made of 120 bit signals and adopt key diagram under the situation of the pattern that is made of 60 bit signals.
Figure 10 illustrates the process flow diagram that the performed pointer position of control part detects an example of handling.
Figure 11 illustrates the process flow diagram that the performed pointer position of control part detects an example of handling.
Figure 12 illustrates the sequential chart that the performed pointer position of control part detects an example of handling.
Figure 13 (A) and Figure 13 (B) illustrate the sign indicating number of variation and the table of the relation between the detection position.
Figure 14 (A)～Figure 14 (D) illustrates the sign indicating number of variation and the table of the relation between the detection position.
Embodiment
Below, describe with reference to the electric wave correcting timepiece of accompanying drawing embodiment of the present invention.Fig. 1 is the functional block diagram of structure that the electric wave correcting timepiece of present embodiment is shown.
Electric wave correcting timepiece 1 is made of acceptance division 10, receiving antenna 11, control part 20, power supply unit 40, drive source 50, gear set 60, pointer 70 etc.
Overview to electric wave correcting timepiece 1 describes.Control part 20 receives the etalon time electric wave (coded signal constantly) that never illustrated cell site utilizes electric wave to send in particular moment by receiving antenna 11 and acceptance division 10.This signal is provided for the internal clocking 21 in the control part 20.Control part 20 carries out the time correction action, that is: according to this moment coded signal the time of internal clocking 21 proofreaied and correct, and drive source 50 carried out drive controlling so that gear set 60 rotates, thus the instruction time of proofreading and correct the pointer 70 of analog timepiece.In order to proofread and correct in this way the instruction time of pointer 70, electric wave correcting timepiece 1 has the 1st optical sensor 30a and the 2nd optical sensor 30b of the position that is used to detect pointer 70.Pointer 70 comprises not shown hour hands and minute hand.
Fig. 3 is the skeleton view of the movement installed on the electric wave correcting timepiece 1.Fig. 4 is the cut-open view of movement.Drive source 50 comprises stator 51, coil board 52, rotor pinion 53, Hall element 54, coil 55 and rotor 56.Gear set 60 comprises the 1st fen breast wheel 61, the 2nd fen breast wheel 62, the 3rd fen breast wheel 63, back gear 64, minute wheel 65, hour wheel 66.Drive source 50, gear set 60 and circuit substrate 80 are accommodated in the space between upper plate 90a and the lower plate 90b.
The 1st optical sensor 30a is fixed on the lower plate 90b in the mode relative with the 2nd fen breast wheel 62.The 2nd optical sensor 30b is fixed on the lower plate 90b in the mode relative with back gear 64.To be described in detail the 1st optical sensor 30a and the 2nd optical sensor 30b below.
Then gear set 60 is described.The large diameter gear 63a of the 3rd fen breast wheel 63 and rotor pinion 53 engagements, the 3rd fen breast wheel 63 is driven in the rotation of rotor pinion 53.And, the small-diameter gear 63b engagement of the large diameter gear 62a of the 2nd fen breast wheel 62 and the 3rd fen breast wheel 63, the 2nd fen breast wheel 62 is driven in the rotation of the 3rd fen breast wheel 63.
The small-diameter gear 62b engagement of the large diameter gear 61a of the 1st fen breast wheel 61 and the 2nd fen breast wheel 62, the 1st fen breast wheel 61 is driven in the rotation of the 2nd fen breast wheel 62.The small-diameter gear 61b engagement of the large diameter gear 65a of minute wheel 65 and the 1st fen breast wheel 61, minute wheel 65 is driven in the rotation of the 1st fen breast wheel 61.
The large diameter gear 64a of back gear 64 and the small-diameter gear 65b of minute wheel 65 engagement, back gear 64 is driven in the rotation of minute wheel 65.The large diameter gear 66a of hour wheel 66 and the small-diameter gear 64b of back gear 64 engagement, hour wheel 66 is driven in the rotation of back gear 64.Minute wheel 65 and hour wheel 66 are configured on the same axle.On minute wheel 65 and hour wheel 66, be connected with not shown minute hand and hour hands respectively.
The reduction gear ratio of the large diameter gear 63a of rotor pinion 53 and the 3rd fen breast wheel 63 is 3,53 3 weeks of rotation of rotor pinion, thereby the 3rd fen 63 1 weeks of rotation of breast wheel.Therefore, breast wheel 63 per 6 pulses in the 3rd fen rotated for 1 week.
And the reduction gear ratio of the large diameter gear 62a of the small-diameter gear 63b of the 3rd fen breast wheel 63 and the 2nd fen breast wheel 62 is 6.Therefore, the reduction gear ratio of rotor pinion 53 and the 2nd fen breast wheel 62 is that breast wheel 62 per 36 pulses in 18, the 2 fens rotated for 1 week.
The reduction gear ratio of the large diameter gear 61a of the small-diameter gear 62b of the 2nd fen breast wheel 62 and the 1st fen breast wheel 61 is 24/7.Therefore, the reduction gear ratio of rotor pinion 53 and the 1st fen breast wheel 61 is that breast wheel 61 per 864 pulses in 432/7, the 1 fen rotated for 7 weeks.
The reduction gear ratio of the small-diameter gear 61b of the 1st fen breast wheel 61 and the large diameter gear 65a of minute wheel 65 is 35/12.Therefore, rotor pinion 53 is 180 with the reduction gear ratio of minute wheel 65, and minute wheel 65 per 360 pulses rotated for 1 week.
The reduction gear ratio of the small-diameter gear 65b of minute wheel 65 and the large diameter gear 64a of back gear 64 is 3.Therefore, rotor pinion 53 is 540 with the reduction gear ratio of back gear 64, and back gear 64 per 1080 pulses rotated for 1 week.
The reduction gear ratio of the small-diameter gear 64b of back gear 64 and the large diameter gear 66a of hour wheel 66 is 4.Therefore, the 3rd fen breast wheel 63 is 2160 with the reduction gear ratio of hour wheel 66, and hour wheel 66 per 4320 pulses rotated for 1 week.Thus, per 360 pulses of minute hand rotated for 1 week, and per 4320 pulses of hour hands rotated for 1 week.
Then the 1st fen breast wheel 61, the 2nd fen breast wheel 62 and back gear 64 are described.Fig. 5 (A)～Fig. 5 (C) is the key diagram of the 1st fen breast wheel 61, the 2nd fen breast wheel 62 and back gear 64.
Shown in Fig. 5 (A), on the 1st fen breast wheel 61, on 12 positions of the face of the lower plate 90b that disposes the 1st optical sensor 30a of large diameter gear 61a one side, be provided with reflecting plate 61c.The minimum interval of adjacent reflecting plates 61c is 15 °.Shown in Fig. 5 (A), be that reflecting plate 61c1 is under the situation of benchmark with one among a plurality of reflecting plate 61c, disposing other reflecting plates 61c with 15 °, 45 °, 60 °, 75 °, 105 °, 150 °, 225 °, 240 °, 255 °, 270 °, 345 ° interval in the counterclockwise direction from reflecting plate 61c1.
Shown in Fig. 5 (B), be formed with the single through hole 62c that runs through large diameter gear 62a vertically on the breast wheel 62 at the 2nd minute.
Shown in Fig. 5 (C), on back gear 64, on 6 positions of the face of the lower plate 90b that disposes the 2nd optical sensor 30b of large diameter gear 64a one side, dispose reflecting plate 64c.Reflecting plate 64c is with 60 ° uniformly-spaced be provided with.In addition, when pointer 70 indications 0: 00 timesharing, reflecting plate 61c1 overlaps with through hole 62c.
When the 1st optical sensor 30a is luminous, as shown in Figure 4, under the situation that through hole 62c is relative and reflecting plate 61c through hole 62c and the 1st fen breast wheel 61 is relative of the 1st optical sensor 30a and the 2nd fen breast wheel 62, from the light of the light-emitting component of the 1st optical sensor 30a by the through hole 62c plate 61c reflection that is reflected, light after the reflection passes through through hole 62c once more, thereby is received by the photo detector of the 1st optical sensor 30a.
In addition, the reason that the 2nd fen breast wheel 62 is installed between the 1st optical sensor 30a and the 1st fen breast wheel 61 is: because the amount of movement of the 1st fen breast wheel 61 under 1 pulse is very small, therefore for fear of the position beyond the former position that should detect also having been carried out situation about detecting, adopted by clamping very large the 2nd minute breast wheel 62 of 1 amount of movement under the pulse, the photo detector that makes the 1st optical sensor 30a only just can receive the structure of light during by through hole 62 at light.
When the photo detector of the 1st optical sensor 30a receives the light time, shown in the 1st optical sensor SENSOR of Figure 12, to the signal of control part 20 output scheduled voltages.On the other hand, when the 1st optical sensor 30a and through hole 62c are not relative, perhaps, as the 1st optical sensor 30a but through hole 62c and reflecting plate 61c relative or not the time with through hole 62c, under the luminous situation of the light-emitting component of the 1st optical sensor 30a, the photo detector of the 1st optical sensor 30a can not receive the light of self-emission device, compares lower magnitude of voltage to control part 20 outputs with the situation that the photo detector of the 1st optical sensor 30a receives light, for example the signal of ground connection GND level.Control part 20 can be according to the position of rotation of grasping the 1st fen breast wheel 61 from the output of the photo detector of the 1st optical sensor 30a.
Equally, control part 20 makes the light-emitting component of the 2nd optical sensor 30b luminous according to predetermined timing.When the light-emitting component of the 2nd optical sensor 30b is luminous, under the 2nd optical sensor 30b situation relative with the reflecting plate 64c of back gear 64, the photo detector of the 2nd optical sensor 30b receives light via through hole 80c, shown in the 2nd optical sensor SENSOR of Figure 12, to the signal of control part 20 output scheduled voltages.Under the 2nd optical sensor 30b and the not relative situation of reflecting plate 64c, compare lower magnitude of voltage to control part 20 outputs with the situation that the 2nd optical sensor 30b receives light, for example the signal of ground connection GND level.Thus, control part 20 can be grasped the position of rotation of back gear 64.
Then, position relation from the signal of the 1st optical sensor 30a and the 2nd optical sensor 30b and pointer is described.Fig. 6 is the key diagram from the position relation of the signal of the 1st optical sensor 30a and the 2nd optical sensor 30b and pointer.Control part 20 is to make the 1st optical sensor 30a and the 2nd optical sensor 30b light-emitting component separately luminous in the cycle with 36 pulses.In addition, the 1st optical sensor 30a and the 2nd optical sensor 30b light-emitting component separately carry out luminous timing 18 pulses of staggering, and both can be simultaneously not luminous.
In Fig. 6, make light-emitting component by the luminous respectively situation of this timing under, the signal indication that the 1st optical sensor 30a and the 2nd optical sensor 30b photo detector is separately received light time output is " H ", and the signal indication that will not receive light time output is " L ".And, as shown in Figure 6,105 ° of breast wheel 61 per 36 pulses rotations in the 1st fen, 12 ° of back gear 64 per 36 pulses rotations.
As shown in Figure 6, the photo detector of the 2nd optical sensor 30b is the cycle to receive light with 180 pulses.In other words, in 5 times of the light-emitting component of the 2nd optical sensor 30b were luminous, the photo detector of the 2nd optical sensor 30b must receive 1 time.Its reason is, back gear 64 per 180 pulses rotation, 60 degree therewith accordingly, serve as to be provided with 6 reflecting plate 64c at interval with 60 degree on the large diameter gear 64a of back gear 64.
And, the photo detector of the 1st optical sensor 30a regularly concerned with the position of through hole 62c and reflecting plate 61c by light and different according to this photo detector.Continuously the signal " H ", the cycle of " L " of output are 864 pulses that are equivalent to the 1st fen 61 7 weeks of rotation of breast wheel from the 1st optical sensor 30a.That is, per 864 pulses with identical order to control part 20 output signals " H ", " L ".
Then, signal and the corresponding relation between the moment from the 1st optical sensor 30a are described.Fig. 7 illustrates the table of relation between the sign indicating number that is made of 5 continuous bit signals and the moment with the signal from the 1st optical sensor 30a as bit signal.
As shown in Figure 7, control part 20 since 0: 00 according to " H " " H " " L " " L " " H " " L " " H " ... sequence detection to from the signal of the 1st optical sensor 30a.In other words, the photo detector of the 1st optical sensor 30a according to above-mentioned order to control part 20 output signals.Control part 20 will be handled as bit signal from the signal of the 1st optical sensor 30a, with the signal " H " from the 2nd optical sensor 30b described later is benchmark, according to the bit signal of continuous output, generate the sign indicating number that constitutes by continuous 5 bit signals from the 1st optical sensor 30a output.This sign indicating number is with constantly corresponding, and control part 20 detects pointer position from corresponding tables described later shown in Figure 8.Wherein, 1 cycle that was equivalent to hour hands in 12 hours.
And the pattern of bit signal is 1 cycle with 24 bit signals.Therefore, as shown in Figure 7,5 bit signals that were consecutively detected since 2: 30 are consistent with continuous 5 bit signals as described below, that is, these continuous 5 bit signals are to have postponed 1 bit signal and detected than 5 bit signals that go out since 0: 00 continuous detecting.In other words, corresponding with 0: 00 sign indicating number and with 2: 30 corresponding yard 1 bit signal that staggers each other.Its reason is, the sign indicating number corresponding with per 30 minutes moment is made of 5 bit signals, and be relative with it, and the pattern of bit signal is to be that 24 bit signals of 25 few 1 of 5 multiple constitute by likening to.
And as shown in Figure 6, at 0: 00, from during between the signal " H " of the 1st optical sensor 30a and its next signal " H ", control part 20 detected signal " H " from the 2nd optical sensor 30b.And at 0: 30, from during between the signal " L " of the 1st optical sensor 30a and its next signal " H ", control part 20 detected signal " H " from the 2nd optical sensor 30b.In other words, at 1 sign indicating number that continuous arbitrarily 5 bit signals by the 1st optical sensor 30a output constitute, export 1 signal " H " from the 2nd optical sensor 30b.Control part 20 is a benchmark with this signal from the 2nd optical sensor 30b " H ", and the signal from the 1st optical sensor 30a with reference to output before and after it detects pointer position.
Here, reusing Fig. 6, is example with situation about detecting since 1: 24 pointer position, carries out simple declaration to implementing the situation that pointer position detects action.When implement detecting action, control part 20 detects output from the 1st optical sensor 30a according to the timing of 2 pulses 1 time.At 1: 24, be " L " from the output of the 1st optical sensor 30a, also be same at 1: 30, but at 1: 36, become " H " from the output of the 1st optical sensor 30a.Control part 20 is stored in this testing result among the RAM 25 when the output " H " that detects from the 1st optical sensor 30a, and detects output from the 1st optical sensor 30a and the 2nd optical sensor 30b according to the timing of 18 pulses 1 time.Assigning to 1: 57 from 1: 39, is " L " from the signal of the 2nd optical sensor 30b, at 2: 03, becomes " H " from the signal of the 2nd optical sensor 30b.
In addition, 20 pairs of testing results of control part are stored, till the testing result from the 1st optical sensor 30a and the 2nd optical sensor 30b respectively has 5 to be stored among the RAM 25.When the testing result of storage among the RAM 25 reaches 10, detect corresponding pointer position according to these 10 testing results.By above method, can be according to the position of detecting hour hands in per 30 minutes.
Fig. 8 is the pointer position corresponding tables that the relation between 10 testing result detecting in the bit signal that generates by Fig. 6 and pattern shown in Figure 7 and the pointer position corresponding with this testing result is shown.Control part 20 can be grasped 60 detection positions in 12 hours according to the sign indicating number that is made of continuous 5 bit signals from the 1st optical sensor 30a with relative with this yard, from the output of the signal " H " of the 2nd optical sensor 30b regularly.Table shown in Figure 8 is stored among the ROM24.In addition, in Fig. 8, the 1st optical sensor 30a is expressed as " optical sensor 1 ", and the 2nd optical sensor 30b is expressed as " optical sensor 2 ".And, " H " expression " High (high level) ", " L " expression " Low (low level) ".
Then, the whole process of the present invention of designing is described.
Pointer position is detected for per 30 minutes, need in 12 hours, judge 24 kinds of pointer positions.In order to generate 24 kinds of bit signals, need 2 * 2 * 2 * 2 * 2=2
5The signal of=32 5 bits.Because need 24 kinds of sign indicating numbers that are made of 5 bit signals, therefore total number of required signal is 24 * 5=120.
Fig. 9 (A) is the key diagram that adopts under the situation of the pattern that is made of 120 bit signals.Shown in Fig. 9 (A),, a plurality of reflecting plates or through hole need be set on gear in order to generate 120 bit signals.When so a plurality of reflecting plates or through hole will be set on gear, the interval of adjacent reflecting plates etc. narrowed down, and flase drop may take place survey.And, be difficult in a plurality of reflecting plates etc. be set on the miniature gear.
Then, imagine in order to reduce different types of yardage and repeat 2 times situation in the pattern of 12 hours Nepit signals.Fig. 9 (B) is the key diagram that adopts under the situation of the pattern that is made of 60 bit signals.Shown in Fig. 9 (B), when same bit signal pattern repeated 2 times in 12 hours, the number of bit signal only needed 60 and gets final product.Therefore, compared with the above case, can reduce the quantity of the reflecting plate that need be arranged on the gear etc.
But in this case, 0: 00 sign indicating number is consistent with 6: 00 sign indicating number.Equally, 0: 30 sign indicating number is consistent with 6: 30 sign indicating number.Therefore, can't distinguish these pointer positions.This is to be the multiple of number (5) that constitutes the bit signal of sign indicating number because constitute the number (60) of the bit signal of bit mode.
When the pattern that makes bit signal repeated 3 times in 12 hours, the number that constitutes the bit signal of pattern was 40, and it also is 5 multiple, can generate a plurality of identical sign indicating numbers on different pointer positions.
On the other hand, as shown in Figure 7, when the pattern that makes bit signal repeated 5 times in 12 hours, except the sign indicating number of 8:30 and 9:00, sign indicating number was all inconsistent between each pattern.Like this only by generating 24 bit signals, promptly available (except a position) all different sign indicating number constitutes 24 kind of 5 bit signal.The position that is arranged on the 1st fen reflecting plate 61c on the breast wheel 61 and the number of reflecting plate 61c etc. are set, made and repeat to export this 24 bit signals.
In addition,,, can determine the time, therefore in fact can constitute 24 kind of 5 bit signal with all different sign indicating numbers as long as judge according to their bit signals before and after separately for the sign indicating number (8:30 of present embodiment and 9:00) that repeats.
And, as shown in Figure 8 in the present embodiment, the sign indicating number that will be used to confirm pointer position is made as by from the signal of the 1st optical sensor 30a and the pattern that constitutes from the signal of the 2nd optical sensor 30b, thus can form the sign indicating number that do not have repetition, whole different sign indicating numbers.Therefore can not hinder pointer to detect.
Here, the 1st optical sensor 30a comes output signal " H " or " L " according to the position of the 1st fen breast wheel 61, so the 1st optical sensor 30a is equivalent to export the 1st output unit that whether is in the corresponding bit signal in precalculated position with the 1st fen breast wheel 61.Breast wheel 61 was equivalent to gear in the 1st minute.And as previously mentioned, output in per 30 minutes is from the signal " H " of the 2nd optical sensor 30b, and therefore the 2nd optical sensor 30b is equivalent to the 2nd output unit according to the fixed cycle output reference signal corresponding with the action of gear set 60.Back gear 64 is equivalent to another gear.It is benchmark that control part 20 is equivalent to the signal " H " (being equivalent to reference signal) from the 2nd optical sensor 30b, detects the control module of the corresponding pointer position of sign indicating number that constitutes with continuous a plurality of bit signals of being exported by the 1st optical sensor 30a.
And, be equivalent to from 5 bit signals of the 1st optical sensor 30a output from the cycle of the signal " H " of the 2nd optical sensor 30b.And, be equivalent to 24 bit signals from the pattern cycle of the bit signal of the 1st optical sensor 30a output.And the cycle of hour hands is equivalent to 120 bit signals.Therefore, from cycle (5 bit signals) of the signal " H " of the 2nd optical sensor 30b and shorter than the cycle (120 bit signals) of hour hands from the pattern cycle (24 bit signals) of the bit signal of the 1st optical sensor 30a output, and (5 * 24=120) is consistent with the cycle (120 bit signals) of hour hands for the lowest common multiple in each cycle.Thus, even under the short situation of the pattern cycle of the bit signal that the 1st optical sensor 30a exports, also can increase the detection position of hour hands.
Thus,, also can increase the detection position of hour hands, detect pointer position in can be between short-term even the number of reflecting plate 61c is less.Therefore, on miniature gear, also can adopt this structure.And, can be when suppressing gear and maximizing between short-term in the detection pointer position.And,, can reduce the processing load of control part 20 owing to can increase the pointer detection position by less bit signal.
And as previously mentioned, the bit signal from the 1st optical sensor 30a output is 1 cycle with 24.The quantity of the bit signal of in this pattern cycle, exporting with hour hands in the cycle quantity from the signal " H " of the 2nd optical sensor 30b output consistent.Utilize this structure, can make the bit signal number in the pattern be minimum, increase the detection position of hour hands simultaneously.
And, the 1st optical sensor 30a and the 2nd optical sensor 30b position probing separately to as if the back gear 64 grown than the 1st fen breast wheel 61 of the 1st fen breast wheel 61 and swing circle.Come the reason of desired location detected object to be in this manner: as previously mentioned, from the signal " H " of the 2nd optical sensor 30b is signal as the benchmark that is used to differentiate the sign indicating number that is made of the bit signal from the 1st optical sensor 30a output, so recently the bit signal from the 1st optical sensor 30a is few from the output number of the signal " H " of the 2nd optical sensor 30b.
Then, illustrate that with reference to process flow diagram and sequential chart control part 20 performed pointer positions detect processing.Figure 10 and Figure 11 illustrate the process flow diagram that control part 20 performed pointer positions detect an example of handling.Figure 12 illustrates the sequential chart that control part 20 performed pointer positions detect an example of handling.
Detect when handling when carrying out pointer position, 20 pairs of rotors of control part 56 carry out F.F. drive (step S1, t1).Then, control part 20 according to the change in polarity of coming detection rotor 56 from the detection signal of Hall element 54 (step S2, t2).
As the polarity of rotor 56 when the S utmost point becomes the N utmost point (t4), control part 20 makes the light-emitting component of the 1st optical sensor 30a luminous (step S4, t5).Therefore, when the polarity of rotor when the N utmost point becomes the S utmost point, the light-emitting component of the 1st optical sensor 30a is not luminous.
When having carried out input, promptly received the light time (t8) when the photo detector of the 1st optical sensor 30a, control part 20 extinguishes the light-emitting component (step S8) of the 1st optical sensor 30a, this testing result is stored among the RAM 25 (step S9, t9).Then, from the photo detector of the 1st optical sensor 30a receive light through 18 pulses after, control part 20 make the light-emitting component of the 2nd optical sensor 30b luminous (step S10, t10), confirm afterwards from the photo detector of the 2nd optical sensor 30b signal (step S11, t11).Then, control part 20 extinguishes the light-emitting component (step S12) of the 2nd optical sensor 30b, will whether receive the relevant testing result of light with the photo detector of the 2nd optical sensor 30b and be stored in (step S13) among the RAM 25.In addition, in sequential chart shown in Figure 12, the photo detector that shows the 2nd optical sensor 30b receives the situation of light (t12).
Then, control part 20 makes the light-emitting component of the 1st optical sensor 30a luminous after 18 pulses (step S14, t13), confirms the signal (step S15, t14) from the photo detector of the 1st optical sensor 30a afterwards.Afterwards, control part 20 extinguishes the light-emitting component (step S16) of the 1st optical sensor 30a, and its testing result is stored in (step S17, t15) among the RAM 25.Then, (step S18 t16), confirms that afterwards (step S19 t17), extinguishes the light-emitting component (step S20) of the 2nd optical sensor 30b for signal from the photo detector of the 2nd optical sensor 30b to make the light-emitting component of the 2nd optical sensor 30b luminous after 18 pulses.Then, control part 20 stores its testing result among the RAM (step S21, t18).
Then, control part 20 judges whether the quantity N of the testing result of being stored among the RAM 25 is 10 (step S22).The quantity of the testing result of this moment is meant the quantity from the testing result of the signal of the 1st optical sensor 30a and the 2nd optical sensor 30b both sides' photo detector.When the quantity N of testing result less than 10 the time, the processing of execution in step S14 once more.When the quantity N that surveys the result was 10, control part 20 compared the testing result of storage among the RAM 25 and table shown in Figure 8, determine pointer position (step S23, t19).
Then, the variation to pointer position detection method describes.
Figure 13 (A), Figure 13 (B), Figure 14 (A)～Figure 14 (D) illustrate the sign indicating number of variation and the table of the relation between the detection position.Shown in Figure 13 (A), the number of reflecting plate 61c etc. can be set for to constituting bit mode by 28 bit signals, and the settings such as swing circle of the 1st fen breast wheel 61 can be become hour hands rotate a circle during from 84 bit signals of the 1st optical sensor 30a output.And, the swing circle of back gear 64 can also be set at:, export 1 signal " H " from the 2nd optical sensor 30b at 1 sign indicating number that constitutes by continuous arbitrarily 6 bit signals from the 1st optical sensor 30a output.
In this case, pattern cycle (28 bit signals) from cycle (6 bit signals) of the signal of the 2nd optical sensor 30b and bit signal is also short than the cycle (84 bit signals) of pointer, and the lowest common multiple in each cycle is consistent with the cycle of hour hands.
In addition, shown in Figure 13 (B), can also constitute bit mode by 48 bit signals.Can set in this case, hour hands rotate a circle during output 240 bit signals.And, also can set for:, export 1 signal " H " from the 2nd optical sensor 30b at 1 sign indicating number that constitutes by continuous arbitrarily 10 bit signals from the 1st optical sensor 30a output.
In this case, pattern cycle (48 bit signals) from cycle (10 bit signals) of the signal of the 2nd optical sensor 30b and bit signal is also short than the cycle (240 bit signals) of pointer, and the lowest common multiple in each cycle is consistent with the cycle of hour hands.
In addition, shown in Figure 14 (A), hour hands rotate a circle during in when setting 32 positions that can detect, can carry out following setting: constitute bit mode by 32 bit signals; Hour hands rotate a circle during output 160 bit signals; At 1 sign indicating number that constitutes by continuous arbitrarily 5 bit signals, export 1 signal " H " from the 2nd optical sensor 30b from the 1st optical sensor 30a output.
In this case, pattern cycle (32 bit signals) from cycle (5 bit signals) of the signal of the 2nd optical sensor 30b and bit signal is also short than the cycle (160 bit signals) of pointer, and the lowest common multiple in each cycle is consistent with the hour hands cycle.The quantity of the bit signal of exporting in pattern cycle in addition, (32) is consistent with the quantity (32) from the signal " H " of the 2nd optical sensor 30b output in the cycle of hour hands.
In addition, shown in Figure 14 (B), hour hands rotate a circle during in when setting 19 positions that can detect, can carry out following setting: constitute bit mode by 19 bit signals; Hour hands rotate a circle during in output 95 bit signals; At 1 sign indicating number that constitutes by continuous arbitrarily 5 bit signals, export 1 signal " H " from the 2nd optical sensor 30b from the 1st optical sensor 30a output.
In this case, pattern cycle (19 bit signals) from cycle (5 bit signals) of the signal of the 2nd optical sensor 30b and bit signal is also short than the cycle (95 bit signals) of pointer, and the lowest common multiple in each cycle is consistent with the hour hands cycle.The quantity of the bit signal of exporting in pattern cycle in addition, (19) is consistent with the quantity (19) from the signal " H " of the 2nd optical sensor 30b output during the week of hour hands.
In addition, shown in Figure 14 (C), can carry out following setting: constitute bit mode by 7 bit signals; Hour hands rotate a circle during output 35 bit signals; At 1 sign indicating number that constitutes by continuous arbitrarily 5 bit signals, export 1 signal " H " from the 2nd optical sensor 30b from the 1st optical sensor 30a output.
In this case, pattern cycle (7 bit signals) from cycle (5 bit signals) of the signal of the 2nd optical sensor 30b and bit signal is also short than the cycle (35 bit signals) of pointer, and the lowest common multiple in each cycle is consistent with the cycle of hour hands.The quantity of the bit signal of exporting in pattern cycle in addition, (7) is consistent with the quantity (7) from the signal " H " of the 2nd optical sensor 30b output in the cycle of hour hands.
In addition, shown in Figure 14 (D), can carry out following setting: constitute bit mode by 4 bit signals; Hour hands rotate a circle during output 20 bit signals; At 1 sign indicating number that constitutes by continuous arbitrarily 5 bit signals, export 1 signal " H " from the 2nd optical sensor 30b from the 1st optical sensor 30a output.
In addition, under the situation of having carried out setting in the mode shown in Figure 13 (A), Figure 13 (B), Figure 14 (A)～Figure 14 (D), also can be as shown in Figure 8, according to the output of sign indicating number and the signal from 2nd optical sensor 30b " H " relative regularly, grasp more detection position with sign indicating number.
More than a preferred embodiment of the present invention is described in detail, but the specific implementations that the invention is not restricted to be correlated with in the purport scope of the present invention that claims are put down in writing, can be carried out various distortion/change.
In the above-described embodiment, on gear, be provided with reflecting plate, but also can light-emitting component and photo detector be set, and the through hole of the light transmission that makes self-emission device is set on this gear across gear.
Claims (9)
1. hand position testing device, its position to the pointer that turned round by gear set by drive source is detected, and it is characterized in that this hand position testing device has:
Be included in the gear in the described gear set;
The 1st output unit, whether its output is in the corresponding bit signal in precalculated position with described gear;
The 2nd output unit, it is according to the fixed cycle output reference signal corresponding with the action of described gear set; And
Control module, its reference signal with described output is a benchmark, detects the position of yard corresponding described pointer that constitutes with continuous a plurality of described bit signals by described output,
The cycle of the described pointer of period ratio of the cycle of described reference signal and the pattern of described bit signal is short, and the lowest common multiple in each cycle is consistent with the cycle of described pointer.
2. hand position testing device according to claim 1 is characterized in that,
The quantity of the described reference signal of exporting in the bit number of exporting in the cycle of the pattern of described bit signal and the cycle at described pointer is consistent.
3. hand position testing device according to claim 1 and 2 is characterized in that,
The precalculated position of described gear is provided with reflecting plate or through hole,
Described the 1st output unit comprises:
Light-emitting component, it shines described gear; And
Photo detector, whether it exports and receives from the corresponding described bit signal of the light of described light-emitting component via described reflecting plate or through hole.
4. hand position testing device according to claim 1 and 2 is characterized in that,
Described gear set comprises another gear except described gear,
The precalculated position of described another gear is provided with reflecting plate or through hole,
Described the 2nd output unit comprises:
Light-emitting component, it shines described another gear;
Photo detector, it is in response to receiving via described reflecting plate or through hole from the light of described light-emitting component and export described reference signal.
5. hand position testing device according to claim 3 is characterized in that,
Described pointer as the position probing object is hour hands,
The swing circle of described gear is shorter than the swing circle of the minute wheel that is connected with minute hand.
6. hand position testing device according to claim 4 is characterized in that,
Described pointer as the position probing object is hour hands,
The swing circle of described another gear is longer than the swing circle of the minute wheel that is connected with minute hand.
7. hand position testing device according to claim 4 is characterized in that,
For described gear and described another gear swing circle separately, the former swing circle is shorter than the latter's swing circle.
8. clock and watch is characterized in that,
These clock and watch have the described hand position testing device of claim 1.
9. pointer position detection method, its position to the pointer that turned round by gear set by drive source is detected, and it is characterized in that this pointer position detection method has following steps:
Whether the gear that comprises in output and the described gear set is in the corresponding bit signal in precalculated position;
According to the fixed cycle output reference signal corresponding with the action of described gear set; And
Reference signal with described output is a benchmark, detects the position of yard corresponding described pointer that constitutes with continuous a plurality of described bit signals by described output,
The cycle of the described pointer of period ratio of the cycle of described reference signal and the pattern of described bit signal is short, and the lowest common multiple in each cycle is consistent with the cycle of described pointer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-025788 | 2008-02-05 | ||
| JP2008025788A JP4468997B2 (en) | 2008-02-05 | 2008-02-05 | Pointer position detection device, clock, and pointer position detection method |
| JP2008025788 | 2008-02-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101504534A true CN101504534A (en) | 2009-08-12 |
| CN101504534B CN101504534B (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910004896XA Expired - Fee Related CN101504534B (en) | 2008-02-05 | 2009-02-04 | Hand position detecting apparatus, clock and hand position detecting method |
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| Country | Link |
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| JP (1) | JP4468997B2 (en) |
| CN (1) | CN101504534B (en) |
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| CN101975553A (en) * | 2010-10-14 | 2011-02-16 | 烟台持久钟表集团有限公司 | Clock hand position detection device and detection method |
| CN103547971A (en) * | 2011-05-18 | 2014-01-29 | 西铁城控股株式会社 | Electronic clock |
| CN104597739A (en) * | 2013-10-30 | 2015-05-06 | 斯沃奇集团研究和开发有限公司 | Device for detecting the position of watch hands |
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| CN106909063A (en) * | 2015-12-22 | 2017-06-30 | 精工时钟有限公司 | Pointer position detects structure and clock and watch |
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2008
- 2008-02-05 JP JP2008025788A patent/JP4468997B2/en active Active
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| CN104597739A (en) * | 2013-10-30 | 2015-05-06 | 斯沃奇集团研究和开发有限公司 | Device for detecting the position of watch hands |
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| CN106773637A (en) * | 2016-12-28 | 2017-05-31 | 歌尔科技有限公司 | The method of intelligent watch and its setting time with indicator and indicator drive mechanism |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4468997B2 (en) | 2010-05-26 |
| JP2009186293A (en) | 2009-08-20 |
| CN101504534B (en) | 2011-02-09 |
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