WO2006103730A1 - 基準信号発生装置及び方法 - Google Patents
基準信号発生装置及び方法 Download PDFInfo
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- WO2006103730A1 WO2006103730A1 PCT/JP2005/005718 JP2005005718W WO2006103730A1 WO 2006103730 A1 WO2006103730 A1 WO 2006103730A1 JP 2005005718 W JP2005005718 W JP 2005005718W WO 2006103730 A1 WO2006103730 A1 WO 2006103730A1
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- tooth
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- rotation
- time interval
- time
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
- G01D5/2451—Incremental encoders
Definitions
- the present invention relates to a reference signal generating apparatus and method for measuring and controlling a rotating object.
- ECUs are used for the purpose of measuring the output performance of an automobile internal combustion engine (hereinafter referred to as the engine) and for the purpose of controlling the injection amount of fuel, injection timing, and the like.
- Examples of applications related to the engine control method and apparatus include JP-A-53-65531, JP-B-7-33809, and Japanese Patent No. 3262003.
- the fuel injection amount, injection timing and the like are controlled based on the rotation angle of the crankshaft.
- the ignition timing control combustion characteristics and output torque characteristics change, and emissions of NOx, PM, and other harmful substances contained in the exhaust gas after combustion change, so accurate measurement data can be obtained. Therefore, controlling the optimal ignition timing is an important technology.
- Patent Document 1 a gear-shaped disk with teeth (protrusions or notches) provided at regular intervals is attached to an engine crankshaft, and each tooth is rotated when the crankshaft rotates.
- the rotation angle is detected by detecting this with an electromagnetic pickup or optical sensor, and this detection signal is used for the above measurement and control.
- Patent Document 1 Japanese Patent Publication No. 5-55709
- the present invention has been made in view of the above-described conventional problems, and the object of the present invention is to use a conventional gear-shaped angle detection mechanism to change the rotating state every moment. Accordingly, it is an object of the present invention to provide a reference signal generator capable of generating a reference signal for data measurement and engine control in real time with high resolution (for example, 0.1 degrees or less).
- an angle sensor fixedly installed on a rotating object sequentially detects a plurality of teeth mounted on the rotating object at a predetermined angular interval.
- a reference signal generator for measuring a time interval between adjacent teeth and generating a reference signal for measurement / control corresponding to an arbitrary rotation angle, in the n ⁇ k period of rotation of the rotating object. (N, k: natural number, n> k), the time interval between the second tooth immediately before the first tooth and the first tooth, and the first interval immediately after the first tooth and the first tooth.
- the rotation speed of the rotating object is increased when the first tooth is detected by the angle sensor in the n-k period.
- a rotational tendency calculating means for calculating a tendency, and the rotational tendency is reflected in a time interval between the second tooth and the first tooth in the nth cycle.
- the rotation time predicting means for predicting the time interval between the first tooth and the third tooth in the nth cycle and the angle sensor detect the first tooth in the nth cycle and then Reference signal generating means for generating a reference signal that is subdivided by dividing the predicted time interval by V based on a predetermined angular resolution until the third tooth is detected.
- the reference signal generation method is an angle sensor force fixedly installed on a rotating object.
- the predicted inter-tooth time interval is predicted by reflecting the rotation tendency of the same tooth in the same period in the past in the time interval data between the previous teeth. This makes it possible to generate a highly accurate reference signal that takes into account the tooth characteristics and rotation tendency in the previous time interval, thereby realizing real-time ECU measurement and control.
- the reference signal generation means may reflect the rotation tendency in the generation mode of the reference signal.
- the rotation tendency may be reflected in the generation mode of the reference signal.
- the reference signal generating means calculates, as the rotational tendency, a degree of change in the rotational speed of the rotating object when the first tooth is detected by the angle sensor in the nk cycle. May be issued.
- the degree of change in the number of rotations of the rotating object when the first tooth is detected by the angle sensor in the nk cycle is calculated as the rotation tendency. May be issued.
- the degree of change in the rotational speed is regarded as a rotational tendency, and this is reflected in the generation mode of the reference signal, and the reference signal follows the change in the rotational speed, so that the degree of change in the rotational speed is particularly large.
- the difference from the reference signal generated for the tooth that predicts the next time interval is smoothed, and the accuracy of the measurement control is improved.
- the rotation time predicting means expresses the time interval measured between the teeth based on the resolution! And / or the quotient divided by the numerical value obtained from the resolution, based on the quotient and the remainder.
- the time interval is predicted, and the quotient and the remainder may be obtained based on the output value of the counter that overflows for each numerical value obtained based on the resolution.
- the reference signal generation method represents the time interval measured between the teeth as a quotient obtained by dividing the time interval by the numerical value obtained based on the resolution! Then, the time interval is predicted, and the quotient and the remainder are obtained using a counter that overflows for each numerical value obtained based on the resolution.
- the time interval between each tooth is expressed as a quotient without using division and a remainder, and thereafter the time interval is similarly predicted using the quotient and remainder, and the predicted quotient This makes it possible to generate a reference signal immediately, thus realizing real-time measurement and control.
- the rotating object is an automobile engine
- the reference signal is a measurement of output characteristics such as a rotational torque of the engine, such as a rotational speed, and a fuel injection amount or an injection via Z or ECU.
- ⁇ It may be used as a trigger for controlling the ignition timing.
- the present invention is expected to be useful in the future for the measurement and control of ECUs in real time and with high accuracy.
- the predicted time interval between the teeth is reflected in the time interval data between the immediately preceding teeth by reflecting the rotational tendency of the same tooth in the same period in the past. Therefore, the predicted tooth characteristics and rotation tendency are taken into account in the previous time interval.
- a highly accurate reference signal can be generated, and real-time ECU measurement and control power can be realized.
- the time interval between each tooth is similarly predicted using the quotient and the remainder, and the predicted quotient Since the reference signal can be generated immediately by the remainder, real-time measurement and control is realized.
- the present invention is expected to be useful in the future for the measurement and control of ECUs in real time and with high accuracy.
- FIG. 1 is a diagram showing a schematic configuration of an automobile engine 1 to be subjected to measurement and control in an apparatus such as an ECU 8 and a rotation angle detection mechanism of the engine 1.
- the engine 1 has a cylinder shape, and compresses and burns inhaled gasoline, and a chemical reaction between the burned gas (hydrocarbon) and oxygen in the air taken in through a valve (not shown). To generate thermal energy. Then, the piston 2 is pushed down by this thermal energy, the crankshaft 3 connected to the piston 2 is rotated, and a tire (not shown) connected to the crankshaft 3 is rotated. The fuel that is the driving force for this rotation is exhausted from the muffler 4 as exhaust gas.
- the four-stroke engine is a four-stroke engine that performs four strokes of intake, compression, combustion, and exhaust once while the crankshaft 3 rotates twice (720 degrees). In contrast, an engine that performs four strokes once while the crankshaft rotates once (360 degrees) is called a two-cycle engine.
- a four-cycle engine the piston moves up and down two times (four strokes) in the cylinder, so it is also called a four-stroke engine.
- a two-stroke engine is also called a two-stroke engine.
- each cylinder is shifted in the specified order while the crankshaft rotates twice (in the case of four cycles), and four strokes are performed.
- the cycle is shifted by 180 degrees to “1 3— 4 ”t 4 Perform four strokes in order ⁇ ⁇ , so that combustion continues in the engine.
- a gear-shaped disk 5 having teeth 6 (protrusions or notches) provided at regular intervals is attached to the outer periphery of the crankshaft 3 shown in FIG. It rotates with the rotation.
- the number of teeth 6 may be 36 in total every 10 degrees, which is 60 in total every 6 degrees.
- a part of the position where the tooth should be provided is used as a reference position for counting the number of rotations (cycles) of the crankshaft, and for identifying individual teeth.
- Teeth are provided in order to be used as a reference position for counting the tooth numbers of! /, NA! /, (Missing teeth! /), And teeth are provided at shorter intervals than usual.
- the angle sensor 7 is composed of an electromagnetic pickup or an optical sensor, and is fixedly installed at a predetermined position of the engine 1 that is a rotating object (in this embodiment, a predetermined position near the outside of the disk 5).
- the tooth detection signal output means 70 receives the electromotive force (voltage) and current generated from the angle sensor 7, and based on the change in the electromotive force and current, the tooth angle changes with the rotation of the crankshaft 3. Each time the sensor 7 is approached, a pulsed tooth detection signal is output.
- the start position signal output means 72 assigns a tooth number for identification to each tooth, so that a position where the tooth is missing or is provided at intervals shorter than usual is a start position signal. Is output with a pilot pulse or the like. If this start position signal is detected, it is possible to calculate the number of rotations and the number of rotations (speed) by simply assigning the tooth number to each tooth sequentially. Will be sent and used as needed.
- the time interval between the tooth detection signal of a certain tooth and the tooth detection signal of an adjacent (immediately or immediately following) tooth is an angular resolution (for example, tooth 60 resolution is 6 degrees). Therefore, the tooth detection signal is used as a reference signal for measuring data necessary for the ECU 8 and for controlling the engine ignition timing.
- output characteristic data such as output torque 'rotation speed and rotation speed' are measured corresponding to each rotation angle triggered by the output of the reference signal, and if you want to perform fuel ignition control at a certain rotation angle, An ignition command is issued in response to the output of a reference signal corresponding to the angle. That is, the reference signal is a signal output corresponding to an arbitrary rotation angle for measurement and control in the rotation state of the rotating object.
- crankshaft rotation speed (angular velocity) can also be calculated by measuring the time interval between two adjacent tooth detection signals with a counter or the like. Noh.
- the rotation angle detection mechanism of the rotating object is configured by the gear-shaped disk 5, the angle sensor 7, the tooth detection signal output means 70, and the start position signal output means 72.
- the configuration is conventionally known. However, when trying to achieve even higher resolution with such a gear-shaped disk 5, there are problems in manufacturing and physical limits, and it is not practical to increase the number of teeth indefinitely. Measurement 'Control is not possible.
- the rotational output of the engine always changes depending on the movement and stroke of the piston, even if the average output is controlled in advance. For example, the number of revolutions is slow near the top dead center, fast near the bottom dead center, slows in the compression stroke, and fast in the combustion'explosion stroke. In addition, the change in the rotational speed is greater at low speed than at high speed. Furthermore, in the case of a multi-cylinder engine, the rotational speed also changes due to variations among cylinders.
- the present invention predicts the time interval between teeth mounted on a rotating object whose rotation state is not always constant, and uses a reference signal necessary for measurement and control as a conventional rotation angle.
- the detection mechanism is used as it is, and it is generated with high resolution.
- the first feature of the reference signal generator of the present invention is the n-k period (n, k:
- FIG. 1 An example for explaining the basic concept of the present invention is shown in FIG. In Fig. 2, consider the case where a disk is attached to the crankshaft of the engine to be measured and controlled, and the crankshaft is controlled to rotate at a constant speed from the initial speed of 600 rpm to the final speed of 6000 rpm in one second.
- the four strokes (one cycle) of the engine intake, “compression” and “combustion” are defined as one cycle (two crankshaft rotations).
- teeth continuously provided at arbitrary positions on the disk at intervals of 6 degrees are sequentially referred to as A, B, and C, and teeth detected by the angle sensor in the n period are referred to as A, B, and C.
- the tooth detection signal output means When the engine starts rotating and the angle sensor detects teeth, the tooth detection signal output means outputs a pulsed tooth detection signal as shown in FIG. In the upper part of Fig. 2, the tooth detection signal output when passing through the vicinity of the angle sensor in the order of teeth A, B, and C in the (n-1) cycle of the engine and a certain tooth detection signal are output. The result of measuring the time until the next tooth detection signal is output is shown. In the (n-1) period, the time interval between tooth A and tooth B was 1654 s, and the time interval between tooth B and tooth C was 1630 s.
- the measured time interval varies depending on the number of revolutions unless the rotational motion is constant, and in this example, the measured time interval is Is short! /, Ru (1654> 1630) t, so the rotation speed (or speed) tends to increase It can be said.
- the time interval between the teeth immediately before the predicted teeth is determined as the rotational tendency of the rotating object when the same tooth in the past (combustion stroke in the combustion stroke) is detected by the angle sensor. Therefore, the prediction accuracy is improved by adding the tooth characteristics and rotation tendency to the previous time interval data. For example, even if the tooth processing accuracy is low or there are missing teeth, etc., the relationship between the same tooth past cycles is applied. It will be offset when predicting the time interval.
- the time interval between tooth B and tooth C previously predicted by extrapolation is divided (interpolated) to have a desired resolution.
- the reference signal can be generated (see the lower part of Fig. 2). For example, if you want to perform ECU control etc. with a resolution of 0.1 degree, with a tooth spacing of 6 degrees, that is 1Z60, divide the previously calculated 969 s into 60 equal parts, and the angle sensor At the same time when B is detected, the reference signal every 60 equally divided times may be generated 60 times (60 pulses) continuously until 969 ⁇ s elapses. this This enables real-time ECU measurement and control.
- the rotational tendency to be taken into account is obtained by the same tooth force one cycle before, but it may be two cycles or three cycles before.
- the accuracy of resolution deteriorates as the period older than the period of prediction is used.
- the rotation speed is Because the value and tendency (increase / decrease) differ depending on the stroke of intake 'compression' and 'combustion' exhaust, it is desirable to reflect the same stroke trend. Rather, the trend before 1Z2 cycle becomes the trend of another stroke Therefore, it should not be reflected.
- FIG. 3 is a schematic block diagram of the reference signal generator 10.
- the reference signal generator 10 includes a tooth number / period output means 12, a clock means 14, a storage means 16, a rotation tendency calculation means 18, a rotation time estimate. Measuring means 20 and reference signal generating means 22.
- the tooth number 'cycle output means 12 is based on the start position signal output from the start position signal output means 72 and the tooth detection signal output from the tooth detection signal output means 70. It outputs the tooth number of the tooth of the disk attached to and the engine rotation cycle. After ECU8 starts measuring and controlling (after engine rotation starts), the tooth number is given to the teeth that have passed through the angle sensor 7 in sequence when the start position signal is output. The period is obtained by counting the start position signal (in the case of a 4-cycle engine, it is one period each time the start position signal is detected twice).
- the number of teeth is 58 every 6 degrees (two missing teeth), but since the 4-cycle engine is used, tooth numbers from 0 to 117 are assigned. In other words, even for the same tooth, the tooth number for the second rotation in the first period is the tooth number for the first rotation +58.
- the time measuring means 14 is a means for measuring time triggered by the tooth detection signal output from the tooth detection signal output means 70. The time is measured until the next tooth detection signal is output, that is, the time interval between adjacent teeth is measured. The measured time is hereinafter referred to as measured rotation time data.
- An example of the time measuring means 14 is a counter that counts up every reference time (for example, 1 s).
- the storage means 16 is a means for storing the tooth number 'cycle from the tooth number / period output means 12 and the rotation time actual measurement data measured by the time measuring means 14 in association with each other. As long as the storage means 16 has a capacity capable of storing data for at least the past one cycle (two cycles in total), the stored data may be overwritten and updated every time the cycle changes. Further, the storage means 16 is not limited to the RAM, and may be a nota.
- the rotation tendency calculating means 18 is based on the tooth number stored in the storage means 16 and the rotation time actual measurement data! /, And the engine 1 when the tooth having the tooth number is detected by the angle sensor 7 is detected. This is a means to calculate the rotational tendency of the rise in the number of revolutions and the fall.
- This rotational tendency is stored in the storage means 16.
- the rotation time of tooth number 1 (the time from when angle sensor 7 detects tooth number 1 until force tooth number 2 is detected) is the force ⁇ 200 ⁇ s
- the rotation time predicting means 20 calculates an unknown rotation time (the time from when the angle sensor 7 detects a tooth with a certain period until the angle sensor 7 detects the next tooth of the tooth). This is a means of prediction by reflecting the rotational tendency of the same tooth in the past period in the measured rotation time data of the tooth immediately before the detected tooth.
- the rotation time predicting means 20 uses the section B—C (n: period) as the tooth section for which the rotation time is to be predicted, and knows the section AB and the section B-C. By applying this relationship to the relationship between section A-B and section B-C (the time of section A-B is known), the rotation time of section B-C is predicted.
- the reference signal generation means 22 rotates the reference signal obtained by increasing the rotation angle within the rotation time predicted by the rotation time prediction means 20 until the angle sensor 7 detects the next tooth. It is a means to generate according to an angle. Furthermore, the reference signal generating means 22 of the present embodiment generates a reference signal with high accuracy (high follow-up and correlation between the rotation angle and the rotation time) in consideration of the rotation tendency of the same tooth in the past period. There is a feature in making it.
- the reference signal generating means 22 improves (subdivides) the physical angular resolution obtained by the teeth when dividing the rotation time calculated by the rotation time predicting means 20 Z fraction lZa (fraction) And divide the estimated rotation time by (1Z rate).
- the quotient X and remainder Y are calculated, and Y reference signals are generated every (X + 1) seconds and (a- Y) reference signals are generated every X seconds. .
- the generation mode of the reference signal that is, which of the two types of reference signals is to be generated first depends on the rotational tendency of the same tooth in the past period. To decide.
- the reference signal of (X + 1) seconds is generated first, and conversely if the downward trend is downward, the reference signal of X seconds is first applied. To generate.
- the reference signal of (X + 1) seconds is generated first, and conversely if the downward trend is downward, the reference signal of X seconds is first applied.
- the reference signal of X seconds is first applied.
- the accuracy of the angular resolution is improved. It is expected.
- the reference signal generation device 10 of the present embodiment predicts an unmeasured rotation time in real time and provides high resolution until the next tooth is detected.
- the purpose is to generate a reference signal corresponding to the rotation angle of the ECU and perform ECU measurement and control with high accuracy. Since the rotation time prediction means 20 uses the actual rotation time data of the tooth immediately before the predicted tooth for the prediction, it is necessary to immediately perform the calculation for the prediction and the generation of the reference signal to generate the reference signal.
- Real-time performance is particularly required for ECU measurement and control because fuel injection and exhaust gas emissions have a significant impact on fuel injection when the time is low (the speed is low and the change in speed is large).
- ⁇ It is the timing of ignition, and if this control is performed after the rotation state has changed, it makes no sense to predict the rotation time and generate a reference signal with high angular resolution.
- “real time” in this specification means that the rotation time is predicted and the reference signal is already calculated before the output of the reference signal for measurement and control.
- Count up to 9 Since the next overflow occurs after counting up to 59, the incremented value is stored in the storage means 16 or the internal buffer of the counter. This operation is repeated until an arbitrary tooth is detected and the force next tooth is detected.When the next tooth is detected, the overflow count (quotient X) and the counter are detected when the next tooth is detected. The last counted value (remainder ⁇ ) is stored in the storage means 16 in association with the tooth number and period.
- the rotation time measurement data of each tooth is stored as a quotient divided by a and a remainder without using division according to the output value of the counter. Since the rotation time is predicted using the remainder, and the reference signal can be generated immediately only by adding and subtracting the predicted quotient and the remainder, real-time measurement and control of the ECU is realized.
- FIG. 1 a disk 5 having teeth 6 spaced 6 degrees is attached to the crankshaft 3 of the engine 1 to be tested, and the teeth 6 are sequentially detected by the angle sensor 7. It is assumed that the rotation angle is detected, and that the start position signal output means 72 and the tooth detection signal output means 70 are connected to the reference signal generator 10 and the reference signal generator 10 is connected to the ECU 8. .
- the engine speed is set as the engine test condition.
- the final rotation number m is set (S110), and this is used as the condition for the end of the test (engine drive stop).
- the engine 1 starts to rotate (S120).
- the tooth number / cycle output means 12 sequentially measures the tooth number and the period n based on signals from the start position signal output means 72 and the tooth detection signal output means 70 (S 130).
- the time measuring means 14 detects the tooth number and measures time until the next tooth number is detected. Then, the measured rotation time measurement data is stored in the storage means 16 in correspondence with the tooth number measured in S130 and the cycle n (S140). At this time, it is desirable to calculate and store the number of rotations based on the actual rotation time data and the period n.
- the time measuring means 14 is a 60-digit counter that measures time every 1 ⁇ s, and a numerical value obtained by adding 1 to the rotation time measurement data every time the 60-counter overflows (quotient) And the value (remainder) in the middle of counting when the next tooth is detected, and this is stored in the storage means 16.
- the reason why the 60-degree counter is used is that the resolution of the rotation angle is changed from 6 degrees between the current teeth to 0.1 degree of 1Z60 later, and 60 is used when generating the reference signal. This is to omit the division process.
- a rotational speed of 1 means that the rotational speed is decreasing, and a rotational tendency of 1 means that the rotational speed is increasing.
- the rotation time cannot be predicted, and the process returns to S130.
- the time predicting means 20 predicts the rotation time of the next tooth after the tooth stored in the storage means 16 immediately before in S140 (S160).
- N-1 -N force is less than SO
- subtract 1 from the calculated commercial power and add 60 to the quotient, which can be classified as a quotient obtained by dividing the rotation time by 60.
- the surplus force exceeds S60
- 1 is added to the obtained quotient, and the surplus force is also subtracted by 60, so that the rotation time can be classified as a quotient divided by 60.
- the reference signal generator 22 Based on the rotation time of the tooth T predicted in S 160, the reference signal generator 22 subdivides the rotation angle between the tooth T and the next tooth T so as to have a predetermined resolution. -N ⁇ + 1 ' ⁇
- the mode for generating the number is determined (S170).
- a total of 60 reference signal generation memories assigned numbers 1 to 60 are prepared in the storage means 16, and the reference signal generation means 22 stores the value of the quotient of the tooth T in the memory. Store in 1 ⁇ 60 respectively. Note that the number of reference signal generating memories is the same as the decimal number of the counter of the time measuring means 14 (numerical value a obtained based on the resolution).
- rotation tendency is 1 (that is, an upward tendency)
- 1 is added to the value of the quotient stored from memory 1 to memory (remainder value).
- rotation tendency is 0 (that is, the downward tendency)
- 1 is added to the quotient value stored in memory (60—the remainder value + 1) to memory 60.
- the reference signal generating means 22 starts outputting the reference signal to the ECU 8 immediately after the tooth T is detected and the force (S180).
- the stored value of memory 1 is read first, and the count is continued until the counter value counted every 1 ⁇ s reaches the stored value. To output a reference signal.
- the memory number counter is incremented and the stored value in the memory 2 is read.
- the reference signal is output. This is repeated until the memory number counter reaches 60 (until the last memory 60).
- the number is young !, stored in memory, and the count time is short Stores information related to the reference signal.
- the angular resolution obtained from the reference signal can also be given a gradient of a rising tendency of rotation, and the followability and correlation between the rotation angle and the rotation time are increased.
- the reference signal generator 10 described above is configured only by hardware such as addition / subtraction, comparison, and force counter without using multiplication / division, the prediction of the rotation time of the next tooth, and the reference signal generation mode Decisions can be made in real time, and reference signals required for measurement and control can be generated immediately, and real-time measurement 'control is realized.
- FIG. 6 shows a graph of the error between and in percentage.
- Fig. 6 (a) is a graph showing the errors for tooth numbers 1 to 60 in the second cycle
- Fig. 6 (b) is an average of errors for tooth numbers 1 to 60 for each cycle. It is a graph.
- the reference signal generating apparatus and method of the present invention include the reference signal generating apparatus and method having all of the configuration requirements described in the above embodiments.
- Various changes and modifications other than those described above are possible. It goes without saying that significant changes and modifications also belong to the scope of the claims of the present invention.
- the remaining value of the predicted rotation time is used as a reference in accordance with the two states of the rotation tendency of the past period being 0 or 1. Deciding whether to store in the first half of the signal generation memory (young or numbered memory) or in the second half, the reference signal was given a gradient according to the rotation tendency.
- the reference signal generation mode can be determined by the following method so that the accuracy of the angular resolution of 0.1 degree is further improved.
- the reference signal generation means 22 stores the numerical values in the reference signal generation memories 1 to 60, and then executes the flowchart of FIG.
- the reference signal generating memories 1 to 60 are based on the quotient, the remainder and the rotation tendency. Number of -N -N -N-1
- the rotation time predicting means 20 and the reference signal generating means 22 can be simultaneously predicted using the reference signal generating memory. (In other words, S170 and S180 in the flowchart of FIG. 4 are executed simultaneously).
- the rotation time predicting means 20 (and the reference signal generating means 22) detects the count value (the number of overflows) of the tooth T immediately before the tooth T from the time measuring means 14 (60-digit counter). ⁇ -1 ⁇
- the rotation time can be predicted and the reference signal generation mode can be determined at a time.
- FIG. 1 is a diagram showing a schematic configuration of an engine and an engine rotation angle detection mechanism.
- FIG. 2 is a diagram showing an example for explaining the basic concept of the present invention.
- FIG. 3 is a schematic block diagram of a reference signal generator of the present invention.
- FIG. 4 is a flowchart showing an example of the operation of the reference signal generator of the present invention.
- FIG. 5 is a diagram showing an example of a specific method for predicting rotation time and generating a reference signal.
- FIG. 6 is a graph showing the error between the predicted rotation time result and the actual measurement result as a percentage.
- FIG. 7 is a flowchart showing another example of determination of a reference signal generation mode.
- FIG. 8 is a diagram showing an image of addition / subtraction of a stored value in a memory.
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US11/887,217 US7844386B2 (en) | 2005-03-28 | 2005-03-28 | Reference signal generator and method |
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Cited By (3)
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JP2013083590A (ja) * | 2011-10-12 | 2013-05-09 | Canon Inc | エンコーダシステム |
CN103185603A (zh) * | 2011-12-29 | 2013-07-03 | 苏州汇川技术有限公司 | 增量编码器信号处理系统及方法 |
CN103807036A (zh) * | 2012-11-12 | 2014-05-21 | 第一拖拉机股份有限公司 | 高适用性电控柴油机信号发生器软件系统 |
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DE102005047922B4 (de) * | 2005-10-06 | 2016-10-20 | Robert Bosch Gmbh | Umrechnung Zeitsegment in Winkelsegment mittels vergangenem Drehzahlverlauf |
JP4820461B2 (ja) * | 2009-12-10 | 2011-11-24 | パナソニック株式会社 | 分散型電源システム |
US9817085B2 (en) * | 2012-03-15 | 2017-11-14 | Infineon Technologies Ag | Frequency doubling of xMR signals |
DE102014206715A1 (de) * | 2014-04-08 | 2015-10-08 | Zf Friedrichshafen Ag | Verfahren und Vorrichtung zur Lagebestimmung eines Maschinenteils, Regelverfahren zum Regeln eines Betriebs einer elektrischen Maschine und elektrische Maschine |
US10100570B1 (en) * | 2017-03-27 | 2018-10-16 | Tejas Specialty Group, Inc. | Threshold gasket assembly |
JP2020122659A (ja) * | 2019-01-29 | 2020-08-13 | 日本電産株式会社 | 位置検出装置、モータシステム及び位置検出方法 |
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- 2005-03-28 JP JP2007510260A patent/JP4533430B2/ja not_active Expired - Fee Related
- 2005-03-28 US US11/887,217 patent/US7844386B2/en not_active Expired - Fee Related
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JPH08261794A (ja) * | 1995-03-24 | 1996-10-11 | Mitsubishi Electric Corp | エンコーダ装置及びサーボモーター制御装置 |
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JP2013083590A (ja) * | 2011-10-12 | 2013-05-09 | Canon Inc | エンコーダシステム |
CN103185603A (zh) * | 2011-12-29 | 2013-07-03 | 苏州汇川技术有限公司 | 增量编码器信号处理系统及方法 |
CN103807036A (zh) * | 2012-11-12 | 2014-05-21 | 第一拖拉机股份有限公司 | 高适用性电控柴油机信号发生器软件系统 |
Also Published As
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JPWO2006103730A1 (ja) | 2008-09-04 |
US7844386B2 (en) | 2010-11-30 |
US20090271089A1 (en) | 2009-10-29 |
JP4533430B2 (ja) | 2010-09-01 |
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