CN215528993U - Shaft angle converter module - Google Patents
Shaft angle converter module Download PDFInfo
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- CN215528993U CN215528993U CN202120889556.6U CN202120889556U CN215528993U CN 215528993 U CN215528993 U CN 215528993U CN 202120889556 U CN202120889556 U CN 202120889556U CN 215528993 U CN215528993 U CN 215528993U
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Abstract
The utility model discloses an axial angle converter module, which relates to the field of axial angle conversion and comprises a voltage conversion unit, an axial angle continuous tracking unit and a digital signal conversion unit, wherein the voltage conversion unit is used for converting an axial angle signal into a sine and cosine voltage signal, the axial angle continuous tracking unit is used for processing the sine and cosine voltage signal converted by the voltage conversion unit so as to continuously track the axial angle signal and obtain a tracking value of the axial angle signal, and the digital signal conversion unit is used for converting the tracking value of the axial angle signal into a digital signal and outputting the digital signal. The utility model can solve the problems that the existing shaft-angle converter has generally low conversion precision, can not realize continuous tracking and has poor anti-interference capability.
Description
Technical Field
The utility model relates to the field of shaft angle conversion, in particular to a shaft angle converter module.
Background
In modern weaponry systems, computers have been used in various fields of automatic control, and shaft angle converters have been used as shaft angle measuring elements to provide low-cost and high-precision position sensing for servo control applications, and are widely used in servo systems. The shaft angle converter is a standard electronic conversion module, mainly realizes the conversion between an analog signal and a digital signal of a synchro or a rotary transformer, and is a key component of a computer interface in various control systems. The high-power high-voltage power supply is widely applied to military equipment such as aviation, aerospace, satellite navigation, ships and weapons and is a core device of various follow-up systems.
Shaft-angle converters can be classified according to the type of angle sensor: the four main categories of the synchro-digital converter (SDC converter), the resolver-digital converter (RDC converter), the digital-synchro (DSC converter), and the digital-resolver converter (DRC converter). Each product type has different resolutions such as 10 bits, 12 bits, 14 bits, 16 bits and the like according to the difference of output (or input) digital values. Meanwhile, different excitation frequencies and voltages of the angle sensor motor form the same series of different varieties.
The currently used shaft-angle converter is generally low in conversion precision, incapable of realizing continuous tracking and poor in anti-interference capability.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an axial angle converter module, and solves the problems that the existing axial angle converter is generally low in conversion precision, cannot realize continuous tracking and is poor in anti-interference capability.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an axial angle converter module, includes voltage conversion unit, continuous tracking unit of axial angle and digital signal conversion unit, voltage conversion unit is used for converting the axial angle signal into sine and cosine voltage signal, the continuous tracking unit of axial angle is used for handling the sine and cosine voltage signal that voltage conversion unit converted with continuous tracking axial angle signal and obtain the tracking value of axial angle signal, the digital signal conversion unit is used for converting the tracking value of axial angle signal into digital signal and output.
Furthermore, the voltage conversion unit comprises a micro Scott transformer, the shaft angle continuous tracking unit comprises a high-speed sine and cosine function multiplier, an error amplifier, a phase sensitive demodulator, an integrator, a voltage controlled oscillator and a reversible counter, the digital signal conversion unit comprises a three-state latch and a three-state trigger, three input interfaces S1, S2 and S3 of the micro Scott transformer are connected with an output interface of an external auto-angle machine, RH and RL input interfaces of the micro Scott transformer are respectively connected with a high end and a low end of an external excitation signal, a sine voltage signal output interface and a cosine voltage signal output interface of the micro Scott transformer are respectively connected with an input interface corresponding to the high-speed sine and cosine function multiplier, a reference voltage output interface of the micro Scott transformer is connected with a corresponding input interface of the phase sensitive demodulator, an output interface of the high-speed sine and cosine function multiplier is connected with an input interface of the error amplifier, the output interface of the error amplifier is connected with the corresponding input interface of the phase-sensitive demodulator, the output interface of the phase-sensitive demodulator is connected with the input interface of the integrator, the output interface of the integrator is connected with the input interface of the voltage-controlled oscillator, the output interface of the voltage-controlled oscillator is connected with the input interface of the reversible counter, one output interface of the reversible counter is connected with the corresponding input interface of the high-speed sine and cosine function multiplier, the other output interface of the reversible counter is connected with the input interface of the three-state latch, the output interface of the three-state latch is connected with the input interface of the three-state trigger, and the output interface of the three-state trigger outputs digital signals.
Further, the output interface of the tri-state flip-flop outputs a 12-bit digital signal.
Further, the digital signal conversion unit further comprises an and gate, a first monostable flip-flop and a second monostable flip-flop, one input interface of the and gate is connected with the output interface of the voltage-controlled oscillator, the other input interface of the and gate is connected with the input-disabled terminal INH, the output interface of the and gate is connected with the input interfaces of the first monostable flip-flop and the second monostable flip-flop, the output interface of the first monostable flip-flop is connected with the other input interface of the tristate latch, the output interface of the second monostable flip-flop is connected with the BUSY pulse output terminal BUSY, and the other input interface of the tristate flip-flop is connected with the enable terminal EN.
The utility model has the following beneficial effects:
the high-precision anti-interference continuous tracking type shaft angle converter comprises a voltage conversion unit, a shaft angle continuous tracking unit and a digital signal conversion unit, wherein the voltage conversion unit is used for converting a shaft angle signal into a sine and cosine voltage signal, the shaft angle continuous tracking unit is used for processing the sine and cosine voltage signal converted by the voltage conversion unit so as to continuously track the shaft angle signal and obtain a tracking value of the shaft angle signal, and the digital signal conversion unit is used for converting the tracking value of the shaft angle signal into a digital signal and outputting the digital signal. The high-precision anti-interference continuous tracking type shaft angle converter disclosed by the utility model realizes the continuous tracking of shaft angle signals by forming a closed loop through the phase-sensitive demodulator, the integrator, the voltage-controlled oscillator, the reversible counter and the like, and the conversion precision and the anti-interference capability are greatly improved.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention.
Detailed Description
Example 1:
as shown in fig. 1, an axial angle converter module includes a voltage conversion unit, an axial angle continuous tracking unit, and a digital signal conversion unit, where the voltage conversion unit is configured to convert an axial angle signal into a sine and cosine voltage signal, the axial angle continuous tracking unit is configured to process the sine and cosine voltage signal converted by the voltage conversion unit to continuously track the axial angle signal and obtain a tracking value of the axial angle signal, and the digital signal conversion unit is configured to convert the tracking value of the axial angle signal into a digital signal and output the digital signal.
The voltage conversion unit comprises a micro Scott transformer 1, the shaft angle continuous tracking unit comprises a high-speed sine and cosine function multiplier 2, an error amplifier 3, a phase sensitive demodulator 4, an integrator 5, a voltage controlled oscillator 6 and a reversible counter 7, the digital signal conversion unit comprises a three-state latch 10 and a three-state trigger 12, three input interfaces S1, S2 and S3 of the micro Scott transformer 1 are connected with an output interface of an external auto-scaler, an RH input interface and an RL input interface of the micro Scott transformer 1 are respectively connected with a high end and a low end of an external excitation signal, a sine voltage signal output interface and a cosine voltage signal output interface of the micro Scott transformer 1 are respectively connected with an input interface corresponding to the high-speed sine function multiplier 2, a reference voltage output interface of the cosine of the micro Scott transformer 1 is connected with a corresponding input interface of the phase sensitive demodulator 4, the output interface of the high-speed sine and cosine function multiplier 2 is connected with the input interface of the error amplifier 3, the output interface of the error amplifier 3 is connected with the corresponding input interface of the phase sensitive demodulator 4, the output interface of the phase sensitive demodulator 4 is connected with the input interface of the integrator 5, the output interface of the integrator 5 is connected with the input interface of the voltage-controlled oscillator 6, the output interface of the voltage-controlled oscillator 6 is connected with the input interface of the reversible counter 7, one output interface of the reversible counter 7 is connected with the corresponding input interface of the high-speed sine and cosine function multiplier 2, the other output interface of the reversible counter 7 is connected with the input interface of the tristate latch 10, and the output interface of the tristate latch 10 is connected with the input interface of the tristate flip-flop 12, the output interface of the tri-state flip-flop 12 outputs a digital signal.
The output interface of the tri-state flip-flop 12 outputs a 12-bit digital signal.
The digital signal conversion unit further comprises an and gate 8, a first monostable flip-flop 9 and a second monostable flip-flop 11, wherein one input interface of the and gate 8 is connected with the output interface of the voltage-controlled oscillator 6, the other input interface of the and gate is connected with the input-disabled terminal INH, the output interface of the and gate 8 is connected with the input interfaces of the first monostable flip-flop 9 and the second monostable flip-flop 11, the output interface of the first monostable flip-flop 9 is connected with the other input interface of the tristate latch 10, the output interface of the second monostable flip-flop 11 is connected with the BUSY pulse output terminal y, and the other input interface of the tristate flip-flop 12 is connected with the enable terminal EN.
The high-precision anti-interference continuous tracking type shaft angle converter comprises a voltage conversion unit, a shaft angle continuous tracking unit and a digital signal conversion unit, wherein the voltage conversion unit is used for converting a shaft angle signal into a sine and cosine voltage signal, the shaft angle continuous tracking unit is used for processing the sine and cosine voltage signal converted by the voltage conversion unit so as to continuously track the shaft angle signal and obtain a tracking value of the shaft angle signal, and the digital signal conversion unit is used for converting the tracking value of the shaft angle signal into a digital signal and outputting the digital signal. The high-precision anti-interference continuous tracking type shaft angle converter disclosed by the utility model realizes the continuous tracking of shaft angle signals by forming a closed loop through the phase-sensitive demodulator, the integrator, the voltage-controlled oscillator, the reversible counter and the like, and the conversion precision and the anti-interference capability are greatly improved.
The working principle is as follows:
1. the three-wire output signal of the external synchrotron is connected to three input interfaces S1, S2 and S3 of the micro Scott transformer 1, and the micro Scott transformer converts the three-wire output signal of the external synchrotron into sine and cosine forms: i.e. V1=Ksinωtsinθ，V2= Ksin ω tcos θ. (wherein, Ksin ω t is the excitation signal and the reference signal output by the micro Scott transformer, and θ is the axial angle signal)
2. Assuming that the current word state of the up-down counter 7 is phi, V is set1And V2The digital angle phi of the up-down counter is multiplied by the high-speed sine-cosine function multiplier 2, namely V1 is multiplied by cos phi, V2 is multiplied by sin phi to obtain Ksin omega tsin theta cos phi and Ksin omega tcos theta sin phi.
3. The Ksin omega tsin theta cos phi and Ksin omega tcos theta sin phi are subjected to subtraction processing by an error amplifier 3 to obtain Ksin omega t (sin theta cos phi-cos theta sin phi), namely Ksin omega tsin (theta-phi).
And 4, the Ksin omega tsin (theta-phi) is amplified by the error amplifier 3, phase-detected by the phase-sensitive demodulator 4, subjected to phase detection and integration filtering by the integrator 5 and then enters the voltage-controlled oscillator 6.
5. If theta is not equal to phi, the voltage-controlled oscillator changes the output pulse to change the data in the up-down counter until theta is equal to phi, and a closed loop circuit formed by the phase-sensitive demodulator, the integrator, the voltage-controlled oscillator and the up-down counter leads sin (theta-phi) to be close to zero.
6. When this is done, the word state of the up-down counter is equal to the signal input angle θ, within the nominal accuracy of the converter, where φ represents the output digital angle, during which the converter always tracks the change in the input angle.
7. When the inhibit input INH is a logic high then after the up-down counter has been updated its digital angle phi will be gated into the tristate latch.
8. When the enable terminal EN is a logic low level, then phi will appear at the data output pin of the module.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various changes and modifications to the equivalent embodiments without departing from the scope of the present invention, and all such changes, modifications, equivalents and improvements that can be made to the above embodiments without departing from the technical spirit of the present invention are within the spirit and principle of the present invention.
Claims (4)
1. The axial angle converter module is characterized by comprising a voltage conversion unit, an axial angle continuous tracking unit and a digital signal conversion unit, wherein the voltage conversion unit is used for converting an axial angle signal into a sine and cosine voltage signal, the axial angle continuous tracking unit is used for processing the sine and cosine voltage signal converted by the voltage conversion unit so as to continuously track the axial angle signal and obtain a tracking value of the axial angle signal, and the digital signal conversion unit is used for converting the tracking value of the axial angle signal into a digital signal and outputting the digital signal.
2. The shaft angle converter module as claimed in claim 1, wherein the voltage conversion unit is a micro Scott transformer (1), the shaft angle continuous tracking unit includes a high-speed sine and cosine function multiplier (2), an error amplifier (3), a phase sensitive demodulator (4), an integrator (5), a voltage controlled oscillator (6), and a reversible counter (7), the digital signal conversion unit includes a three-state latch (10) and a three-state flip-flop (12), three input interfaces S1, S2, and S3 of the micro Scott transformer (1) are connected to an output interface of an external self-angle machine, RH and RL input interfaces of the micro Scott transformer (1) are connected to a high end and a low end of an external excitation signal, respectively, a sine voltage signal output interface and a cosine voltage signal output interface of the micro Scott transformer (1) are connected to corresponding input interfaces of the high-speed sine and cosine function multiplier (2), respectively, the reference voltage output interface of the micro Scott transformer (1) is connected with the corresponding input interface of the phase-sensitive demodulator (4), the output interface of the high-speed sine and cosine function multiplier (2) is connected with the input interface of the error amplifier (3), the output interface of the error amplifier (3) is connected with the corresponding input interface of the phase-sensitive demodulator (4), the output interface of the phase-sensitive demodulator (4) is connected with the input interface of the integrator (5), the output interface of the integrator (5) is connected with the input interface of the voltage-controlled oscillator (6), the output interface of the voltage-controlled oscillator (6) is connected with the input interface of the reversible counter (7), one output interface of the reversible counter (7) is connected with the corresponding input interface of the high-speed sine and cosine function multiplier (2), the other output interface of the reversible counter (7) is connected with the input interface of the tristate latch (10), the output interface of the tristate latch (10) is connected with the input interface of the tristate trigger (12), and the output interface of the tristate trigger (12) outputs a digital signal.
3. A shaft angle converter module as claimed in claim 2, characterized in that the output interface of the three-state flip-flop (12) outputs a 12-bit digital signal.
4. An axial angle converter module according to claim 2, characterized in that the digital signal conversion unit further comprises an AND gate (8), a first monostable flip-flop (9) and a second monostable flip-flop (11), one input interface of the AND gate (8) is connected with the output interface of the voltage-controlled oscillator (6), the other input interface is connected with the input inhibiting end INH, the output interface of the AND gate (8) is connected with the input interfaces of the first monostable trigger (9) and the second monostable trigger (11), the output interface of the first monostable flip-flop (9) is connected to the other input interface of the tristate latch (10), the output interface of the second monostable flip-flop (11) is connected with a BUSY pulse output terminal BUSY, the other input interface of the tri-state trigger (12) is connected with an enabling terminal EN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120889556.6U CN215528993U (en) | 2021-04-23 | 2021-04-23 | Shaft angle converter module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120889556.6U CN215528993U (en) | 2021-04-23 | 2021-04-23 | Shaft angle converter module |
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| CN215528993U true CN215528993U (en) | 2022-01-14 |
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| CN202120889556.6U Active CN215528993U (en) | 2021-04-23 | 2021-04-23 | Shaft angle converter module |
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- 2021-04-23 CN CN202120889556.6U patent/CN215528993U/en active Active
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