SU1053006A2 - Transmitter of shaft angle position and shaft rotation rate - Google Patents

Abstract

SENSOR OF ANGULAR POSITION AND SPEED OF ROTATION OF THE SHAFT on the bus. St. No. 934382, about t h and -. This is due to the fact that, with a higher accuracy of the measurement, the second count and the second perHcT f, besides, the digital and symbolic bits tl are equipped with secondary auxiliary bits, the composition of the sensor additionally includes the frequency multiplication and division unit variable factor, block yy .. tani frequencies, second null-organ and 6po & switching ranges, the content of two comparing codes, a dual circuit, two inverters, a reversible counter, and a decoder, the outputs of the auxiliary high-order bits of the second register are connected to the inputs of the first comparison circuit xoaoev-i whose output is connected to the upstream input of the reversible counter On the input is the first frost of the rotor, the output of which is connected to the first input of the coincidence circuit, the second input of which is connected to the output of the second code comparison circuit, the third input to the output of the second inverter, and the output to the sum {; j (to the reversible counter input, jtoTopcvo outputs: connected to the decoder inputs, the last output of which is connected to the input of the second inverter, and all outputs to the frequency division and frequency division control inputs, other inputs (L connectors with the output of the first counter and output the pulse generator, and the output with the input of the frequency subtraction unit, the other input of which is connected to the output of the phase divider, and the bsr through the second null organ to the input of the delayer pulse former, while the outputs of the two most senior and most advanced bits torogo soediso Nena register to the inputs of the second circuit sravneQ audio codes. about 0D

Description

110 The invention relates to a meter; but the technique can also be used as a positioner of the angular position and instantaneous speed of rotation of the shaft in precise digital systems of automatic control and regulation. Known is the angle and position of the speed generator, which contains a pulse generator, the output of which is connected to the counting input of the counter, the output of which is higher than the output signal through the driver, the reference signals of the spinner, which was connected to the output of the zero-body, the output of the zero-body connected to the entrance

enabling the recording of the first register, the information inputs of which are connected to the outputs of the corresponding bits of the first counter, the output of the pulse generator is also connected to the counting input of the second counter via a key whose control input is connected to the output of the additional trigger; the reset input of this trigger is connected to the zero output; organ, the output of which is also connected to the input of the delayed pulses foiiruvatel,. controlling the resolution of recording in the second register, as well as presets of the second counter and setting in one state an additional trigger, information inputs of the second register are connected to the corresponding outputs of the counter jjl

The disadvantage of this device is the impossibility of simultaneous provision in a wide range of changes in the rotational speed of the viewpoint of measuring the accuracy of both the angular field and the speed of the turnaround of VAPA. This is because in order to achieve the minimum error in determining the angular position, the frequency of the phase rotation signal is necessary. ZychTG; t is luy larger than the frequency of the reference signal, at which the minimum error of determining the speed of the turnaround is achieved. The minimum value of the relative error in the measurement of the rate of rise is achieved by optimizing the ratio between the measured speed and the frequency of the reference signal of the phase array.

 The relative accuracy of determining the speed decreases with decreasing speed of rotation if the frequency of the reference voltage simultaneously decreases. But ; Reducing the frequency of the reference voltage leads to an increase in the error condition of the error error in determining the current value of the rotation speed).

The purpose of the invention is to improve accuracy by automating a stable selection of the range for measuring the speed of rotation.

The goal is achieved by the fact that in the angular position sensor and

5 speeds of vrasheni shaft, the second counter and the second register, besides AND digital and sign bits, are equipped with 2 auxiliary high bits, the sensor also includes

0 a multiplying and dividing frequency unit with a variable coefficient, a frequency subtraction unit, a second null organ, and a range switching unit, containing two code comparison schemes, a coincidence circuit, two inverters, a reversible counter, and a decoder, and outputs (I auxiliary higher and the sign bits of the second register are connected to the inputs of the first comparison circuit

0 codes, the output of which is connected to the subtractor input of the reversible counter and to the input of the first inverter, the output of which is connected to the input of the matching circuit, the second input of which is connected

5 to enter the second code comparison circuit, the third input to the output of the second inverter, and the output to the summing input of the reversible counter, the outputs of which are connected to the inputs of the decryptor Q of the torus, the last output of which is connected to the input of the second and 1 inverter, and all outputs are to control inputs of a frequency multiplying and dividing unit, the other inputs of which are connected to the output of the first counter and the output of a pulse generator, and the output to the input of a frequency subtraction unit, another input of which is connected to the output of the phase shifter, and output through the second zero -orga 6 STI determine angular position. The relative error of determining the angular position has ave components. The first component is determined by the change in the angular position during the time between two adjacent measurements. The frequency of the reference signal of the phase shifter is selected by nocTOHHHCrfi (based on the minimum of the detection of the angular position at the maximum speed of rotation), and the output frequency of the phase converter is npeo6pia3OBaHHe before it is fed to the input of the velocity measurement unit (based on the generator, it is set to the speed of the phase shifter, then it is sent to the speed generator (proceeding from the generator of the speed generator). the sign bits of the second register are connected to the inputs of the second coa comparison circuit. In Fig. 1, a functional diagram of the sensor is shown; Fig. 2 is a diagram of a smart unit and division of the clock contains a pulse generator 1, the output of which is connected to the counting input of the first counter 2. The output of the higher discharge of the counter 2 through the former 3 reference voltages is connected to the input of the phase shifter 4 connected by its output to the input of the null organ 5. Output of the zero-organ 5 is connected to the recording resolution input of the first register 6, the information inputs of which are connected to the outputs of the corresponding triggers of the first counter 2, also connected to the inputs of the frequency multiplication and division unit 7, the other input of which is connected to the output g Generator 1, the output of the frequency multiplication and division unit 7 is connected to the input of the frequency reading unit 8, the other input {of which is connected to the output of the phasing of the tel. The output of the frequency subtraction unit 8 is connected. Through the second null organ 9 To the reset input of the additional trigger 10 and the driver 11 delayed pulses, the third output of which is connected to the installation input to the unit, the state of the trigger 1O. The output of the latter is connected to the control input of the key 12. The output of the key 12 is connected to the counting input of the second counter 13, the preset inputs of which are connected to the second output of the driver 11,: the first output of which is connected to the recording enable input of the second register 14, the information inputs of which are connected to the outputs of the second counter 13. In the interaction, the elements lOt 14 14 form a unit 15 measuring the speed of rotation. The range switching unit 16 contains in its composition the first comparing circuit 17 of cbts connected by its inputs to the outputs of the high and sign bits of the second register 14. The output of the comparing circuit 17 is connected to the BEd4HTai6i input of the reversing counter 18 and the input of the first inverter 19. The inverter biDxod is connected to the input of a matching circuit 20. The last input is connected to the output of the second code comparison circuit 21, the inputs of which are connected to the outputs of two digital and sign digits of the second register 14. The third input of the 2O circuit coincides jailH eH with the output of the second inverter 22. Bbixoa 2O circuit is connected to the sum of the reverse input counter 18, the outputs of which are connected to the inputs of the decoder 23. The outputs of the decoder 23 are connected to the control inputs of the frequency multiplication and division unit 7. The last output of the decoder 23 is also connected with. the input of the second inverter 22. The device operates as follows.,. The first counter 2 performs the function; dividing the frequency of the oscillator 1. The shaper 3 generates from the output periodic signals of the first counter 2 the reference voltages of the phase shifter 4. .. The zero-body 5 forms from the output sinusoidal signals of the phase shifter 4 rectangular periodic, on the leading edge of which the code of the first counter 2 is written to the first register 6. The output signals of the first counter 2 together with the pulses of the generator 1 are fed to the information inputs of the frequency multiplication and division unit 7, the control inputs of which affect the output deshifratsura signals 23. The output frequency f 1} d multiplying unit 7 and the frequency dividing - () / l:. ,, if where FO - reference frequency fazovrashatel 1 - integer dependent on the selected present rotational speed measurement range. Signals with frequency Rc from the output of block 7 multiplying and dividing the frequency are fed to the input of block 8 of the subtraction of cleanliness, to the second input of which they receive the code signals of the phase of the rotator with a frequency H "equal to foi ept. where fgn is the frequency of rotation of the shaft of the phase shifter $ 1 | plus and minus signs correspond to two opposite directions of rotation. At the output of the frequency subtraction unit 8, a differential frequency signal Fp equal to Fo | 2 is formed. The second zero-organ 9 of the output sinusoidal signals of the frequency subtraction unit 8 forms rectangular pulses arriving at the rotation speed calculating unit 15, the images of the focal trigger 1O, form 11 delayed pulses, key 12, the second counter 13 and the second register 14 in the above described interconnection. From the expression it is clear that the input to the input unit of the speed calculator of the difference frequency FP is equivalent to the input of the phase shifter of the converted reference frequency p associated with the true frequency value of the HR-EOR ratio of the speed calculation determines the increment of the period Tr of the difference signal GF (° back to the period The transformed signal Tffp (TTsv / pr) works as follows: On the leading edge of the output signal of the null organ 9, the complementary trigger 10 goes to the zero state and, affecting the control inputs key 12, will stop the flow of generator 1 pulses to the counting input of the second counter 13. The leading edge of the output signal of the zero-organ 9 will also start the delayed pulses 11, which outputs a pulse at its first output after a sufficient time to complete the propagation of transfers to the second counter 13 The pulse rewrites the counter code 13 into the second register 14. The second pulse of the delayed pulses of the driver 11, will act on the inputs of the preset WTO. The first counter 13 will write a code into it, corresponding to the time interval between the leading edge of the zero-shift pulse 9 and the beginning of the pulse at the third output of the driver 11 delayed pulses. This pulse arrives at the set-up input of the trigger 1O and translates it into a single state, as a result of which the key 12 is opened, and the pulses of the generator 1 are again fed to the counting input of the second counter 13. Thus, in register 13b of each next period, the output of the zero sign is Authority 9 fixes the difference code bTp equal. To ensure the minimum value of the error B Q, it is necessary for each measured rotational speed to set the converted frequency value and the corresponding value of the parameter 1. However, the immutability of the structure of the measuring unit of rotational speed is ensured only if the parameter i takes integer values, i.e. one value of parameter 4 corresponds to a certain range of intention of rotational speed. The bit size: the increment of & TP will increase at the same time - with a decrease in the rotation frequency vp, which follows from the expression. For a post-discharge bit, the rotation speed is determined by the formula. fepW b where AA is m. So .. Thus, the criterion for the selection of a range is that the constant lTp is maintained unchanged. If the bit increases with the rotation speed (CGS exceeds the target value, then it is necessary to move to a range with a smaller one unit value of parameter 4). Conversely, if Afp decreases, it is necessary to increase the value of parameter 4. The measurement speed of rotation speed will decrease with increasing Minimum value of turide jJaBHoe is determined by ensuring in the first range the best accuracy of measuring the rotational speed. Then the following ranges, corresponding to large values of the parameter i, are A speed measurement rate of 8C} will fall. The value of parameter 4, corresponding to the first speed measurement range, can be found from the ratio AND It 1 IOgz, np 0 The maximum increment ptnoiXi on the range at the maximum rotational speed p and the number of W and F bits The second counter 13 and the second register 14 are determined by the expressions pmoiM epmax. waxf The resulting expression is rounded to the nearest larger integer. In addition to the digital bits, the second counter 13 and the second register 14 are from the auxiliary high and the digit bit. The auxiliary high bits are intended for organizing the analysis of the output of &Tr; beyond the range of the discharge grid, i.e. for performance analysis °. -: A sign that the grid is full is a mismatch of the code in the auxiliary bits with the code of the sign bit. This provision is valid when the condition is fulfilled, - .5 When the signal is on the first and on all subsequent ranges at the end of the period, all f) bits of the second counter 13 are reset to zero. If bTn Q lt MOT from the moment of resetting to zero until the time when the code of the code of LTP in is fixed, register 14 on the counting input of the second counter 13 post n t less than 2 pulses, i.e. only the main bits will change their state and the auxiliary will remain in the zero state. When rtr, any of the auxiliary bits will go to a single state. It’s possible to show that if & Tr is fulfilled with the condition lTR / i, then at the moment of fixation, the auxiliary and sign bits of the second counter 13 will be in a single state, and if this condition is violated, any of the auxiliary bits Dov will go to zero state. Thus, the criterion for switching to a range with alternating "rolling parameter I is the mismatch of the ZEG bit code of the second register 14 with the code of auxiliary bits. Since for each next range, with a constant value of P8, it is accompanied by an increase in discharge by Tr by two bits, then for. obtaining a single (aerial representation at the last range). The number of two letters 5 must be associated with the Komnecti BOM auxiliary bits of the cooiHO 72 (5-0. The criterion for switching to the range with a large value of the parameter i is the coincidence of the code in the two old diffracted bits of the second register 14 with the code of its sign digit Yes. Let 1 06. 8 for example, HpV O, i.e., in the sign-paired de - zero, and, moreover, the two digital digits of the D.RT code are also zeros. Increasing the values of 4 by one will lead to filling in the two higher digit bits, however, no repetition of the bit grid will occur. | Principle p The range switching unit bots are as follows. Checking that the content of the sign bit matches the content of the E auxiliary p 1 bp. If they do not match, then go to the range with a smaller one unit value of the parameter 4. If the contents of the sign and auxiliary bits match , then the matching of the contents of the sign and two high-order digital bits takes place. If there is a match, the transition to the range of the zone with a larger one unit value of the Bloch range switch parameter that implements the reduced algorithm as follows. The first comparison circuit 17 generates a single signal at the output if the contents of the sign and the auxiliary high-order do not match. This single signal is fed to the Bbi4Hta- the second input of the reversible counter 18, respectively, reducing its code by one. The output of the comparison circuit 17 is connected via inverter 19 to the input of the three-input 2O coincidence circuit, the second input of which receives single signals from the output of the second comparison circuit 21 when the sign bit code coincides with the code of the two higher order bits)) connected to the output of the inverter 22. In the absence of a ground potential zero at the output of the inverters 19, 22, the unit potential from the output of the comparison circuit 21 when the sign bit code coincides with the code of the two higher digit bits, and the third input of the circuit 20 is connected output of the inverter 22. In the absence of prohibiting the zero potential at the output of inverter 19, the potential of the unit 22 from the output circuit 21 sryvn "{and in a coincidence circuit 20 goes to a summing input of down counter 18 and will increase the code by one. The counter code 18 is decoded by the decoder 2.3, so that each excited measuring range corresponds to one excited decoder ras. Setting the last range

with the maximum value (corresponding to the measurements of the minimum frequencies in): external, the zero potential from the output of the inverter 22, after its conclusion to the last output of the decoder 23, 5, closes the coincidence circuit 2O. and a further increase in the counter code 17 will be blocked.

Operation 7 is based on the exclusion of the scientific research institutes of each pulse with the number 2 in 10 series of impulses of the generator 1. For this (Fig. 2), the coA 24 “mutator 24 is connected by its information inputs to: the trigger 2 of the counter, and on the inputs to the m“ "Mutator 24 filed you- 15 in

output signals from the decoder 23. If there is a single potential at the i-th output of the decoder 23, the output signal 1 - “south trigger of the counter 2 through the commutator 24 is fed to the input of the for- mator 20 foi 25 short pulses, the output signal of which will forbid the passage

/ foff corner of 1

the next pulse generator 1 through the circuit 26 of the ban. Thus, at the output of the prohibition circuit 26 there will be signals with an average frequency equal to

LSR Pulses with frequency are fed to the input of auxiliary counter 27, which has a conversion factor equal to the conversion factor of counter 2, so that the output of counter 27 will be signals with a frequency of T beats.

Frequency subtraction unit 8 includes

low frequencies.

Thus, the proposed device allows with acceptable for most practical applications accuracy to measure both the angular position and the speed of rotation of the shaft in a wide range of rotational frequencies. The balance modulator and filter itself

fvi.f

fae. 2

Claims (1)

CORRECT POSITION SENSOR -. NII AND SPEEDS OF ROTATION OF THE SHAFT by ed. St. No. 934382, due to the fact that, in order to increase the accuracy of measurement, the second counter and the second register, in addition to the digital and sign digits, are equipped with auxiliary auxiliary digits, an additional block is added to the sensor multiplying and healing frequencies with a variable coefficient, a frequency subtracting unit, a second null organ and a range switching unit containing two code comparison circuits, a coincidence circuit, two inverters, a reversible counter, and a decoder, with outputs of auxiliary auxiliary and signed digits second about the register are connected to the inputs of the first code comparison circuit., the output of which is connected to the subtracting input of the reverse counter and the input of the first inverter, the output of which is connected to the first input of the matching circuit, the second input of which is connected to the output of the second code comparison circuit, the third input is to the output of the second inverter, and the output to the summing input of the reversible counter, the outputs of which are connected to the inputs of the decoder, the last output of which is connected to the input of the second inverter, and all outputs to the control inputs of the multiplication unit and frequency, other inputs of which | They are connected to the output of the first counter and the output of the pulse generator, and the output to the input of the frequency subtraction unit, the other input of which is connected to the output of the phase shifter, and the output through the second zero-organ is connected to the input of the delayed pulse shaper, while the outputs of the two most significant and significant bits the second register connected to the inputs of the second code comparison circuit. 1 1053006