A servo driver non-polarity pulse input filter circuit
By designing a non-polar pulse input filter circuit for a servo driver, the problem of pulse input polarity limitation was solved, enabling arbitrary polarity input and flexible pulse filtering control, thus improving the reliability and applicability of the circuit.
Patent Information
- Application Number
- CN202423182144.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing servo drivers require distinguishing the pulse output direction from the pulse input, and different connection methods for photoelectric sensors can lead to problems such as circuit burnout if the connection is reversed.
Design a servo driver non-polar pulse input filtering circuit, including a bridge rectifier circuit, an isolation and level conversion module, a primary pulse shaping logic flipping module, a primary filtering module, a secondary controllable filtering module, a secondary pulse shaping logic flipping module, and an MCU pulse acquisition and filtering control module. Arbitrary polarity input can be achieved through the series connection and combination of these modules.
It enables pulse signal input without polarity restrictions, allowing NPN and PNP sensors to be connected arbitrarily, and improves the reliability and flexibility of the circuit by controlling the filtering effect through software.
Smart Images
Figure CN223599831U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to servo driver technical field especially relates to a servo driver non -polarity pulse input filter circuit. BACKGROUND
[0002] Servo driver, also known as "servo controller" or "servo amplifier", is a kind of controller used to control servo motor, its function is similar to the function of frequency converter to ordinary ac motor, and it is an important component of servo system.
[0003] The pulse input of the existing servo driver needs to distinguish the pulse output direction, and the commonly used photoelectric sensor is mostly NPN and PNP, PNP and NPN are photoelectric sensors, usually have three lead-out wires: power line VCC, GND (0V line) and OUT signal output line, when PNP type sensor has signal triggering, signal output line OUT and GND are connected, which is equivalent to the low level output of OUT, i.e. current flows into the triode from the emitter E. NPN type sensor is equivalent to the high level output of the power line of OUT, and the main function is current amplification and switching function. Due to the significant difference in structure and function of the above two photoelectric sensors, the NPN and PNP connection mode in the circuit cannot be reversed, otherwise the circuit will be burned out. INVENTION CONTENTS
[0004] The utility model discloses a kind of servo driver non -polarity pulse input filter circuit, mainly solve the problem of the limited polarity of the pulse signal input of current traditional servo driver.
[0005] To achieve the purpose, the utility model provides a kind of servo driver non -polarity pulse input filter circuit, the circuit includes pulse input module, isolation and level conversion module, primary pulse shaping logic flip module, primary filter module, secondary controllable filter module, secondary pulse shaping logic flip module and MCU pulse acquisition and filter control module, the pulse input module includes bridge rectifier circuit, the pulse input module, isolation and level conversion module, primary pulse shaping logic flip module, primary filter module, secondary controllable filter module, secondary pulse shaping logic flip module are connected in turn, and the MCU pulse acquisition and filter control module are connected with secondary controllable filter module and secondary pulse shaping logic flip module respectively.
[0006] Preferably, the bridge rectifier circuit comprises a D1 diode and a D2 diode, both of which are compound diodes, and the bridge rectifier circuit is provided with a first input end, a second input end, and a first output end and a second output end, wherein the first input end of the bridge rectifier circuit is connected to one end of a second resistor, the other end of the second resistor is connected to a first resistor, the second input end of the bridge rectifier circuit is connected to a third resistor, the first output end of the bridge rectifier circuit is connected to one end of a fourth resistor, one end of a first capacitor, and one end of an optocoupler, and the second output end of the bridge rectifier circuit is connected to the other end of the fourth resistor, the other end of the first capacitor, and the other end of the optocoupler, and the first resistor is connected in parallel with the first capacitor and the optocoupler.
[0007] Preferably, the secondary side of the optocoupler is electrically connected to an isolation and level conversion module.
[0008] Preferably, the isolation and level conversion module comprises a NAND gate having a first input end, a second input end, and an output end, the first input end of the NAND gate is connected to one end of a first power supply voltage, the other end of the first power supply voltage is connected to a sixth resistor, the second input end of the NAND gate is grounded, and the output end of the NAND gate is connected to one end of a second capacitor, and the other end of the second capacitor is grounded.
[0009] Preferably, the primary pulse shaping logic inversion module comprises a first operational amplifier having a first input end, a second input end, and an output end, the first input end is connected to a second power supply voltage, the second input end is grounded, and the output end of the first operational amplifier is connected to a primary filter module.
[0010] Preferably, the primary filter module comprises a fifth resistor and a third capacitor connected to one end of the fifth resistor, and the other end of the third capacitor is connected to a ground terminal.
[0011] Preferably, the secondary controllable filter module comprises a second operational amplifier having a first input end, a second input end, and an output end, the output end is connected to one end of a fourth capacitor, the other end of the fourth capacitor is connected to a sixth resistor, the first input end is connected to an output end of an MCU pulse acquisition and filter control module, and the second input end is connected to a ground terminal.
[0012] Preferably, the secondary pulse shaping logic inversion module comprises a third operational amplifier, the input end of the third operational amplifier is connected to the secondary controllable filter module, and the output end of the third operational amplifier is connected to an input end of the MCU pulse acquisition and filter control module.
[0013] Preferably, the MCU pulse acquisition and filtering control module comprises an MCU controller, the MCU controller comprises a pulse receiving signal end and a control output signal end, the pulse receiving signal end is connected with the secondary pulse shaping logic flip module, and the control output signal end is connected with the secondary controllable filtering module.
[0014] The technical scheme provided by the utility model has at least the following technical effects:
[0015] The bridge rectifier circuit is arranged, so that the circuit does not limit the polarity of signal input, and the effect of arbitrary polarity input is achieved.
[0016] The filtering circuit and the MCU pulse acquisition and filtering control module are arranged, so that the circuit controllable pulse filtering can be realized, and the filtering effect can be controlled through software according to pulse input. DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor.
[0018] Figure 1 The flowchart of the embodiment of the utility model is shown in the figure.
[0019] Figure 2 The circuit structure schematic diagram of the embodiment of the utility model is shown in the figure.
[0020] Figure 3 The partial circuit structure schematic diagram of the embodiment of the utility model is shown in the figure.
[0021] Figure 4 The other partial circuit structure schematic diagram of the embodiment of the utility model is shown in the figure.
[0022] Figure 5 The working principle schematic diagram of the embodiment of the utility model is shown in the figure.
[0023] Figure 6 The other working principle schematic diagram of the embodiment of the utility model is shown in the figure.
[0024] Main drawing mark explanation: 1, pulse input module;2, isolation and level conversion module;3, primary pulse shaping logic flip module;4, primary filtering module;5, secondary controllable filtering module;6, secondary pulse shaping logic flip module;7, MCU pulse acquisition and filtering control module. DETAILED DESCRIPTION
[0025] The embodiments of the present application are described below in detail, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.
[0026] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0027] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified.
[0028] Please refer to Figures 1-6 The present application provides a kind of servo driver non-polar pulse input filter circuit, the circuit includes pulse input module 1, isolation and level conversion module 2, first pulse shaping logic flip module 3, first filter module 4, second controllable filter module 5, second pulse shaping logic flip module 6 and MCU pulse acquisition and filter control module 7, the MCU is microcontroller, also called Single Chip Microcomputer or single-chip microcomputer.
[0029] The pulse input module includes a bridge rectifier circuit, the pulse input module, an isolation and level conversion module, a primary pulse shaping logic flip module, a primary filter module, a secondary controllable filter module, a secondary pulse shaping logic flip module are connected in series, and the MCU pulse acquisition and filter control module is connected with the secondary controllable filter module and the secondary pulse shaping logic flip module respectively. The bridge rectifier circuit includes a first input end, a second input end and a first output end, a second output end, wherein the first input end of the bridge rectifier circuit is connected with one end of the second resistor, the other end of the second resistor is connected with the first resistor, the second input end of the bridge rectifier circuit is connected with the third resistor, the first output end of the bridge rectifier circuit is connected with one end of the fourth resistor, one end of the first capacitor and one end of the optocoupler, the second output end of the bridge rectifier circuit is connected with the other end of the fourth resistor, the other end of the first capacitor and the other end of the optocoupler, the first resistor is connected with the first capacitor and the optocoupler in parallel, the isolation and level conversion module includes a NAND gate, the NAND gate has a first input end, a second input end and an output end, the first input end of the NAND gate is connected with one end of the first power supply voltage, the other end of the first power supply voltage is connected with the sixth resistor, the second input end of the NAND gate is grounded, the output end of the NAND gate is connected with one end of the second capacitor, the other end of the second capacitor is grounded, the primary pulse shaping logic flip module includes a first operational amplifier, the first operational amplifier has a first input end, a second input end and an output end, the first input end is connected with the second power supply voltage, the second input end is grounded, the output end of the first operational amplifier is connected with the primary filter module, the primary filter module includes a fifth resistor and a third capacitor connected with the fifth resistor, the other end of the third capacitor is connected with the ground end, the secondary controllable filter module includes a second operational amplifier, the second operational amplifier includes a first input end, a second input end and an output end, the output end is connected with one end of the fourth capacitor, the other end of the fourth capacitor is connected with the sixth resistor, the first input end is connected with the output end of the MCU pulse acquisition and filter control module, the second input end is connected with the ground end, the secondary pulse shaping logic flip module includes a third operational amplifier, the input end of the third operational amplifier is connected with the secondary controllable filter module, the output end of the third operational amplifier is connected with the input end of the MCU pulse acquisition and filter control module, the MCU pulse acquisition and filter control module includes a MCU controller, the MCU controller includes a pulse receiving signal end and a control output signal end, the pulse receiving signal end is connected with the secondary pulse shaping logic flip module, and the control output signal end is connected with the secondary controllable filter module.
[0030] Working principle:
[0031] The utility model discloses an input includes three terminals, is PPI, IN1 and IN2 respectively, all as the one end of input signal.
[0032] Please refer to Figure 5 , below with input signal is 24V level as example (5V level working principle is same) : when PPI input is signal positive polarity, IN2 is negative polarity, and the current flow direction is as shown in the arrow in the drawing, because SIG+ level is higher than SIG-, when signal flows through D1 diode (D1, D2 is compound diode, and 2 diodes are connected in series and encapsulated in the inside), the upper tube of D1 diode is on, and the lower tube is cut off, and the upper tube of D2 diode is cut off, and the lower tube is on, so that the diode of primary side of optocoupler PC5 is on, and signal conduction reaches the secondary side of optocoupler.
[0033] Please refer to Figure 6 , when PPI input signal is negative polarity, and IN2 is positive polarity, the current flow direction is as shown in the arrow in the drawing, because SIG+ level is higher than SIG-, when signal flows through D2 diode (D1, D2 is compound diode, and 2 diodes are connected in series and encapsulated in the inside), the lower tube of D2 diode is on, and the upper tube is cut off, and the upper tube of D2 diode is cut off, and the lower tube is on, so that the diode of primary side of optocoupler PC5 is on, and signal conduction reaches the secondary side of optocoupler.
[0034] Therefore, the utility model embodiment can normally open the optocoupler no matter how signal polarity connects, thereby realizing the non-polarity input conduction function.
[0035] The utility model at least has following beneficial effects:
[0036] 1, the utility model discloses circuit to input pulse signal input non-polarity requirement, arbitrary polarity input;
[0037] 2, the utility model discloses NPN and PNP can be non-polarity limit, and arbitrary access;
[0038] 3, the utility model discloses the pulse filter can be controlled, and can be according to pulse input, and the filtering effect is controlled through software.
[0039] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A servo driver non-polarity pulse input filter circuit, characterized by, The circuit comprises a pulse input module (1), an isolation and level conversion module (2), a primary pulse shaping logic flip module (3), a primary filter module (4), a secondary controllable filter module (5), a secondary pulse shaping logic flip module (6) and an MCU pulse acquisition and filter control module (7), the pulse input module comprises a bridge rectifier circuit, the bridge rectifier circuit is electrically connected with the isolation and level conversion module, the pulse input module (1), the isolation and level conversion module (2), the primary pulse shaping logic flip module (3), the primary filter module (4), the secondary controllable filter module (5), the secondary pulse shaping logic flip module (6) are connected in series, and the MCU pulse acquisition and filter control module (7) is connected with the secondary controllable filter module (5) and the secondary pulse shaping logic flip module (6) respectively.
2. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The bridge rectifier circuit comprises a D1 diode and a D2 diode, the D1 diode and the D2 diode are both compound diodes, the bridge rectifier circuit is provided with a first input end, a second input end and a first output end and a second output end, wherein the first input end of the bridge rectifier circuit is connected with one end of a second resistor, the other end of the second resistor is connected with a first resistor, the second input end of the bridge rectifier circuit is connected with a third resistor, the first output end of the bridge rectifier circuit is connected with one end of a fourth resistor, one end of a first capacitor and one end of an optical coupler, the second output end of the bridge rectifier circuit is connected with the other end of the fourth resistor, the other end of the first capacitor and the other end of the optical coupler, and the first resistor is connected with the first capacitor and the optical coupler in parallel.
3. A non-polarity pulse input filter circuit for a servo driver according to claim 2, wherein The secondary side of the optical coupler is electrically connected with the isolation and level conversion module.
4. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The isolation and level conversion module comprises a NAND gate, the NAND gate has a first input end, a second input end and an output end, one end of the first input end of the NAND gate is connected with a first power supply voltage, the other end of the first power supply voltage is connected with a sixth resistor, the second input end of the NAND gate is grounded, and one end of the output end of the NAND gate is connected with a second capacitor.
5. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The primary pulse shaping logic flip module comprises a first operational amplifier, the first operational amplifier has a first input end, a second input end and an output end, the first input end is connected with a second power supply voltage, the second input end is grounded, and the output end of the first operational amplifier is connected with the primary filter module.
6. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The primary filter module comprises a fifth resistor and a third capacitor connected with the fifth resistor at one end, and the other end of the third capacitor is connected with a grounding end.
7. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The secondary controllable filter module comprises a second operational amplifier, the second operational amplifier comprises a first input end, a second input end and an output end, the output end is connected with one end of a fourth capacitor, the other end of the fourth capacitor is connected with a sixth resistor, the first input end is connected with the output end of the MCU pulse acquisition and filter control module (7), and the second input end is connected with a grounding end.
8. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The secondary pulse shaping logic flip module comprises a third operational amplifier, an input end of the third operational amplifier is connected with the secondary controllable filter module, and an output end of the third operational amplifier is connected with an input end of the MCU pulse acquisition and filter control module (7).
9. A non-polarity pulse input filter circuit for a servo driver according to claim 1, wherein The MCU pulse acquisition and filter control module (7) comprises an MCU controller, the MCU controller comprises a pulse receiving signal end and a control output signal end, the pulse receiving signal end is connected with the secondary pulse shaping logic flip module, and the control output signal end is connected with the secondary controllable filter module.