CN220914943U - Reverse connection prevention circuit and valve actuator - Google Patents
Reverse connection prevention circuit and valve actuator Download PDFInfo
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- CN220914943U CN220914943U CN202322479767.4U CN202322479767U CN220914943U CN 220914943 U CN220914943 U CN 220914943U CN 202322479767 U CN202322479767 U CN 202322479767U CN 220914943 U CN220914943 U CN 220914943U
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Abstract
The application provides an anti-reverse connection circuit and a valve actuator, which belong to the technical field of valve actuators and comprise: the device comprises a micro control unit, a filtering module and an operation module; the micro control unit is electrically connected with the first end of the filtering module; the operation module comprises an operational amplifier, a negative feedback unit and an anti-reverse connection unit; the filtering module is electrically connected with the non-inverting input end of the operational amplifier; the inverting input end of the operational amplifier is electrically connected with the first end of the negative feedback unit; the first end of the reverse connection preventing unit is electrically connected with the output end of the operational amplifier; the connection point of the second end of the negative feedback unit and the second end of the reverse connection preventing unit is electrically connected with the angle signal feedback output end; the analog voltage signal output by the micro control unit is filtered by a filtering module to obtain a filtered signal, and the filtered signal is input to an operational amplifier; the amplifying information is input to the anti-reverse connection unit by the operational amplifier, and then is output to the angle signal feedback output end by the anti-reverse connection unit. In this way, damage to the actuator can be avoided.
Description
Technical Field
The application relates to the field of valve actuators, in particular to an anti-reverse connection circuit and a valve actuator.
Background
At present, an analog voltage of 2-10V is generally used for feeding back the opening angle of an actuator valve, a valve actuator with an interface of 4 wires is provided with two power input wires, an angle control signal input wire and an actual angle feedback signal wire, the signal wire and the power wire of the existing valve actuator are connected with one cable, and the problem that the power wire is connected with the angle signal feedback wire, so that internal elements are burnt and the actuator is damaged can occur.
Disclosure of utility model
In order to solve the technical problems, the embodiment of the application provides an anti-reverse connection circuit and a valve actuator.
In a first aspect, an embodiment of the present application provides an anti-reverse connection circuit, including: the device comprises a micro control unit, a filtering module and an operation module;
The micro control unit comprises a power input end and an output end; the output end of the micro control unit is grounded; the micro control unit is also electrically connected with the first end of the filtering module; the operation module comprises an operational amplifier, a negative feedback unit and an anti-reverse connection unit; the second end of the filtering module is electrically connected with the non-inverting input end of the operational amplifier; the inverting input end of the operational amplifier is electrically connected with the first end of the negative feedback unit; the first end of the reverse connection preventing unit is electrically connected with the output end of the operational amplifier; the connection point of the second end of the negative feedback unit and the second end of the reverse connection preventing unit is electrically connected with the angle signal feedback output end; the analog voltage signal output by the micro control unit is filtered by the filtering module to obtain a filtered signal, and the filtered signal is input to the operational amplifier; the filtered signal is amplified by the operational amplifier, and the output end of the operational amplifier inputs amplified information to the anti-reverse connection unit and then is output to the angle signal feedback output end by the anti-reverse connection unit.
In an embodiment, the micro control unit further comprises: the digital-to-analog converter comprises a digital-to-analog conversion pin, and the digital-to-analog conversion pin is electrically connected with the first end of the filtering module and is used for outputting the analog voltage signal to the filtering module.
In one embodiment, the filtering module includes: a third resistor and a second capacitor; the first end of the third resistor is electrically connected with the digital-to-analog conversion pin; the connection point of the second end of the third resistor and the first end of the second capacitor is electrically connected with the non-inverting input end of the operational amplifier; the second end of the second capacitor is grounded.
In one embodiment, the negative feedback unit includes: a first resistor and a second resistor; the first end of the first resistor is electrically connected with a connection point of the first end of the second resistor and the inverting input end of the operational amplifier; the second end of the first resistor is grounded; the second end of the second resistor is electrically connected with the angle signal feedback output end.
In one embodiment, the anti-reverse unit is: an anti-reverse diode; the first end of the reverse connection preventing unit is the anode of the reverse connection preventing diode; the second end of the reverse connection preventing unit is the cathode of the reverse connection preventing diode; the anode of the reverse connection preventing diode is electrically connected with the output end of the operational amplifier; and the cathode of the reverse connection preventing diode is electrically connected with the angle signal feedback output end.
In an embodiment, the operation module further includes; a filtering unit; the first end of the filtering unit is electrically connected with the output end of the operational amplifier; the second end of the filtering unit is electrically connected with the anode of the anti-reverse diode.
In one embodiment, the filtering unit includes; a fourth resistor and a first capacitor; the first end of the fourth resistor is electrically connected with the output end of the operational amplifier; the connection point of the second end of the fourth resistor and the first end of the first capacitor is electrically connected with the anode of the anti-reverse diode; the second end of the first capacitor is grounded.
In one embodiment, the operational amplifier is TL-022C or TL-060C.
In one embodiment, the micro control unit is ARM Cortex-M or RISC-V.
In a second aspect, embodiments of the present application provide a valve actuator comprising the anti-reverse circuit provided in the first aspect.
Embodiments of the present utility model have the following advantages:
The analog voltage signal output by the micro control unit of the anti-reverse connection circuit is filtered by the filtering module to obtain a filtered signal, the filtered signal is input to the operational amplifier, the filtered signal is amplified by the operational amplifier, the amplified information is input to the anti-reverse connection unit by the output end of the operational amplifier, and then the amplified information is output to the angle signal feedback output end by the anti-reverse connection unit. Because the output voltage is 2V-10V, the operational amplifier cannot be burnt out even if the feedback output end of the angle signal is short-circuited, so that the valve actuator is protected.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are required for the embodiments will be briefly described, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application. Like elements are numbered alike in the various figures.
Fig. 1 is a schematic structural diagram of an anti-reverse circuit according to an embodiment of the present application;
Fig. 2 is another schematic structural diagram of an anti-reverse circuit according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
The terms "comprises," "comprising," "including," or any other variation thereof, are intended to cover a specific feature, number, step, operation, element, component, or combination of the foregoing, which may be used in various embodiments of the present application, and are not intended to first exclude the presence of or increase the likelihood of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in connection with the various embodiments of the application.
Example 1
The embodiment of the application provides an anti-reverse connection circuit, which obtains a filtered signal through a filtering module by an analog voltage signal output by a micro control unit and inputs the filtered signal to an operational amplifier; the filtered signal is amplified by an operational amplifier, and the amplified information is input to the anti-reverse unit by the output end of the operational amplifier and then is output to the angle signal feedback output end by the anti-reverse unit. Thus, if the signal line and the power line of the valve actuator are in the same cable, the function of protecting the internal element can be achieved even when the user connects the power line to the angle signal feedback output end, and the valve actuator is prevented from being damaged.
Referring to fig. 1, the present embodiment provides an anti-reverse connection circuit, which includes: the micro-control unit 110, the filtering module 120 and the operation module 130; the micro control unit 110 includes a power input terminal and an output terminal; the output end of the micro control unit 110 is grounded; the micro control unit 110 is further electrically connected to the first end of the filtering module 120; the operation module 130 comprises an operation amplifier 1303, a negative feedback unit 1301 and an anti-reverse connection unit 1302; a second end of the filtering module 120 is electrically connected with a non-inverting input end of the operational amplifier 1303; an inverting input terminal of the operational amplifier 1303 is electrically connected to a first terminal of the negative feedback unit 1301; a first end of the reverse connection preventing unit 1302 is electrically connected with an output end of the operational amplifier 1303; a connection point of the second end of the negative feedback unit 1301 and the second end of the reverse connection preventing unit 1302 is electrically connected with an angle signal feedback output end; the analog voltage signal output by the micro control unit 110 is filtered by the filtering module 120 to obtain a filtered signal, and the filtered signal is input to the operational amplifier 1303; the filtered signal is amplified by the operational amplifier 1303, and the output end of the operational amplifier 1303 inputs the amplified information to the anti-reverse connection unit 1302, and then is output to the angle signal feedback output end by the anti-reverse connection unit 1302.
The anti-reverse connection circuit provided by the utility model is characterized in that a filtered signal is input to the operational amplifier 1303, the operational amplifier 1303 amplifies the filtered signal, and the output end of the operational amplifier 1303 inputs amplified information to the anti-reverse connection unit 1302 and then outputs the amplified information to the angle signal feedback output end through the anti-reverse connection unit 1302. The external voltage backflow can be prevented, so that the output end of the operational amplifier 1303 cannot be damaged, and meanwhile, the output voltage feedback point of the operational amplifier 1303 is taken at the output end of the anti-reverse connection unit 1302, so that the inaccuracy of the angle feedback signal caused by voltage drop after the anti-reverse connection circuit is added to the angle signal feedback output end can be prevented.
It should be noted that, the operational amplifier 1303 is a high-gain direct coupling voltage amplifying unit having a signal output end, a non-inverting input end, and an inverting input end, and two high-impedance input ends, so that the non-inverting, and differential amplifiers can be manufactured by using operational amplifiers.
Referring to fig. 2, the micro control unit 110 includes: the digital-to-analog converter 1101 includes a digital-to-analog conversion pin, and is electrically connected to the first end of the filtering module 120 through the digital-to-analog conversion pin, so as to output the analog voltage signal to the filtering module 120.
The digital-to-analog converter 1101 is a device that converts a continuous analog signal into a discrete digital signal.
The filtering module 120 includes: a third resistor R3 and a second capacitor C2; the first end of the third resistor R3 is electrically connected with the digital-to-analog conversion pin; the connection point between the second end of the third resistor R3 and the first end of the second capacitor C2 is electrically connected to the non-inverting input end of the operational amplifier 1303; the second end of the second capacitor C2 is grounded.
The negative feedback unit 1301 includes: a first resistor R1 and a second resistor R2; a connection point of the first end of the first resistor R1 and the first end of the second resistor R2 is electrically connected with an inverting input end of the operational amplifier 1303; the second end of the first resistor R1 is grounded; the second end of the second resistor R2 is electrically connected with the angle signal feedback output end.
The reverse connection preventing unit 1302 is: an anti-reverse diode D1; the first end of the anti-reverse connection unit 1302 is the anode of the anti-reverse connection diode D1; the second end of the anti-reverse connection unit 1302 is the cathode of the anti-reverse connection diode D1; the anode of the reverse connection preventing diode D1 is electrically connected with the output end of the operational amplifier 1303; and the cathode of the reverse connection preventing diode D1 is electrically connected with the angle signal feedback output end.
The anti-reverse diode D1 has two electrodes, an anode and a cathode, and is turned on when a forward voltage is applied between the two stages of the anti-reverse diode D1, and turned off when a reverse voltage is applied. The on and off of the diode is equivalent to the on and off of a switch, the anti-reverse diode D1 has unidirectional conduction performance, and the current direction flows from the anode to the cathode through the pipe during the on, so that the anti-reverse diode has unidirectional conduction characteristic, and internal components cannot be burnt out even if the power line is reversely connected with the feedback output end of the angle signal.
The operation module 130 further includes; a filtering unit 1304; a first end of the filtering unit 1304 is electrically connected with an output end of the operational amplifier 1303; a second terminal of the filtering unit 1304 is electrically connected to an anode of the anti-reverse diode D1.
The filtering unit 1304 includes; a fourth resistor R4 and a first capacitor C1; the first end of the fourth resistor R4 is electrically connected with the output end of the operational amplifier 1303; the connection point of the second end of the fourth resistor R4 and the first end of the first capacitor C1 is electrically connected with the anode of the anti-reverse diode D1; the second end of the first capacitor C1 is grounded.
The operational amplifier 1303 is TL-022C or TL-060C.
It should be noted that other types of operational amplifiers are also possible, and are not limited herein.
The micro control unit 110 is ARM Cortex-M or RISC-V.
It should be noted that other types of micro control units are also possible, and the present invention is not limited thereto.
The analog voltage signal output by the micro control unit of the anti-reverse connection circuit provided by the embodiment is filtered by the filtering module to obtain a filtered signal, the filtered signal is input to the operational amplifier, the filtered signal is amplified by the operational amplifier, the amplified information is input to the anti-reverse connection unit by the output end of the operational amplifier, and then the amplified information is output to the angle signal feedback output end by the anti-reverse connection unit. Because the output voltage is 2V-10V, the operational amplifier cannot be burnt out due to the short circuit of the angle signal feedback output end, and therefore the valve actuator is protected.
Example 2
The present embodiment provides a valve actuator, including the anti-reverse circuit provided in embodiment 1, the anti-reverse circuit includes: the device comprises a micro control unit, a filtering module and an operation module; the micro control unit comprises a power input end and an output end; the output end of the micro control unit is grounded; the micro control unit is also electrically connected with the first end of the filtering module; the operation module comprises an operational amplifier, a negative feedback unit and an anti-reverse connection unit; the second end of the filtering module is electrically connected with the non-inverting input end of the operational amplifier; the inverting input end of the operational amplifier is electrically connected with the first end of the negative feedback unit; the first end of the reverse connection preventing unit is electrically connected with the output end of the operational amplifier; the connection point of the second end of the negative feedback unit and the second end of the reverse connection preventing unit is electrically connected with the angle signal feedback output end; the analog voltage signal output by the micro control unit is filtered by the filtering module to obtain a filtered signal, and the filtered signal is input to the operational amplifier; the filtered signal is amplified by the operational amplifier, and the output end of the operational amplifier inputs amplified information to the anti-reverse connection unit and then is output to the angle signal feedback output end by the anti-reverse connection unit.
In an embodiment, the micro control unit further comprises:
The digital-to-analog converter comprises a digital-to-analog conversion pin, and the digital-to-analog conversion pin is electrically connected with the first end of the filtering module and is used for outputting the analog voltage signal to the filtering module.
In one embodiment, the filtering module includes: a third resistor and a second capacitor;
the first end of the third resistor is electrically connected with the digital-to-analog conversion pin;
The connection point of the second end of the third resistor and the first end of the second capacitor is electrically connected with the non-inverting input end of the operational amplifier;
the second end of the second capacitor is grounded.
In one embodiment, the negative feedback unit includes: a first resistor and a second resistor;
The first end of the first resistor is electrically connected with a connection point of the first end of the second resistor and the inverting input end of the operational amplifier;
The second end of the first resistor is grounded;
the second end of the second resistor is electrically connected with the angle signal feedback output end.
In one embodiment, the anti-reverse unit is: an anti-reverse diode;
The first end of the reverse connection preventing unit is the anode of the reverse connection preventing diode;
The second end of the reverse connection preventing unit is the cathode of the reverse connection preventing diode;
the anode of the reverse connection preventing diode is electrically connected with the output end of the operational amplifier;
and the cathode of the reverse connection preventing diode is electrically connected with the angle signal feedback output end.
In an embodiment, the operation module further includes; a filtering unit;
The first end of the filtering unit is electrically connected with the output end of the operational amplifier;
the second end of the filtering unit is electrically connected with the anode of the anti-reverse diode.
In one embodiment, the filtering unit includes; a fourth resistor and a first capacitor;
The first end of the fourth resistor is electrically connected with the output end of the operational amplifier;
The connection point of the second end of the fourth resistor and the first end of the first capacitor is electrically connected with the anode of the anti-reverse diode;
The second end of the first capacitor is grounded.
In one embodiment, the operational amplifier is TL-022C or TL-060C.
In one embodiment, the micro control unit is ARM Cortex-M or RISC-V.
The utility model outputs the anti-analog voltage signal through the micro control unit and obtains a filtered signal through the filtering module, and the filtered signal is input to the operational amplifier; the filtered signal is amplified by the operational amplifier, the output end of the operational amplifier inputs amplified information to the anti-reverse connection unit and then is output to the angle signal feedback output end by the anti-reverse connection unit, meanwhile, the first end of the negative feedback unit is connected to the inverting input end of the operational amplifier, and the second end of the negative feedback unit is connected to the output end of the anti-reverse connection diode, so that the angle signal feedback output end can be prevented from having voltage drop after the anti-reverse connection circuit is added, and the angle feedback signal on the angle signal feedback output end is inaccurate.
The valve actuator provided in this embodiment can implement the reverse connection preventing circuit provided in embodiment 1, and in order to avoid repetition, a description thereof will be omitted.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. An anti-reverse connection circuit, comprising: the device comprises a micro control unit, a filtering module and an operation module;
The micro control unit comprises a power input end and an output end;
The output end of the micro control unit is grounded;
the micro control unit is also electrically connected with the first end of the filtering module;
the operation module comprises an operational amplifier, a negative feedback unit and an anti-reverse connection unit;
the second end of the filtering module is electrically connected with the non-inverting input end of the operational amplifier;
The inverting input end of the operational amplifier is electrically connected with the first end of the negative feedback unit;
The first end of the reverse connection preventing unit is electrically connected with the output end of the operational amplifier;
The connection point of the second end of the negative feedback unit and the second end of the reverse connection preventing unit is electrically connected with the angle signal feedback output end;
The analog voltage signal output by the micro control unit is filtered by the filtering module to obtain a filtered signal, and the filtered signal is input to the operational amplifier; the filtered signal is amplified by the operational amplifier, and the output end of the operational amplifier inputs amplified information to the anti-reverse connection unit and then is output to the angle signal feedback output end by the anti-reverse connection unit.
2. The anti-reverse circuit of claim 1, wherein the micro control unit further comprises:
The digital-to-analog converter comprises a digital-to-analog conversion pin, and the digital-to-analog conversion pin is electrically connected with the first end of the filtering module and is used for outputting the analog voltage signal to the filtering module.
3. The anti-reverse circuit of claim 2, wherein the filtering module comprises: a third resistor and a second capacitor;
the first end of the third resistor is electrically connected with the digital-to-analog conversion pin;
The connection point of the second end of the third resistor and the first end of the second capacitor is electrically connected with the non-inverting input end of the operational amplifier;
the second end of the second capacitor is grounded.
4. The reverse connection prevention circuit according to claim 1, wherein the negative feedback unit comprises: a first resistor and a second resistor;
The first end of the first resistor is electrically connected with a connection point of the first end of the second resistor and the inverting input end of the operational amplifier;
The second end of the first resistor is grounded;
the second end of the second resistor is electrically connected with the angle signal feedback output end.
5. The anti-reverse connection circuit according to claim 1, wherein the anti-reverse connection unit is: an anti-reverse diode;
The first end of the reverse connection preventing unit is the anode of the reverse connection preventing diode;
The second end of the reverse connection preventing unit is the cathode of the reverse connection preventing diode;
the anode of the reverse connection preventing diode is electrically connected with the output end of the operational amplifier;
and the cathode of the reverse connection preventing diode is electrically connected with the angle signal feedback output end.
6. The anti-reverse circuit of claim 5, wherein the operation module further comprises; a filtering unit;
The first end of the filtering unit is electrically connected with the output end of the operational amplifier;
the second end of the filtering unit is electrically connected with the anode of the anti-reverse diode.
7. The reverse connection preventing circuit according to claim 6, wherein the filter unit includes; a fourth resistor and a first capacitor;
The first end of the fourth resistor is electrically connected with the output end of the operational amplifier;
The connection point of the second end of the fourth resistor and the first end of the first capacitor is electrically connected with the anode of the anti-reverse diode;
The second end of the first capacitor is grounded.
8. The anti-reverse circuit of claim 1, wherein the operational amplifier is TL-022C or TL-060C.
9. The anti-reverse circuit according to claim 1, wherein the micro control unit is ARM Cortex-M or RISC-V.
10. A valve actuator comprising an anti-reverse circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322479767.4U CN220914943U (en) | 2023-09-12 | 2023-09-12 | Reverse connection prevention circuit and valve actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322479767.4U CN220914943U (en) | 2023-09-12 | 2023-09-12 | Reverse connection prevention circuit and valve actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220914943U true CN220914943U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322479767.4U Active CN220914943U (en) | 2023-09-12 | 2023-09-12 | Reverse connection prevention circuit and valve actuator |
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|---|---|
| CN (1) | CN220914943U (en) |
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2023
- 2023-09-12 CN CN202322479767.4U patent/CN220914943U/en active Active
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