CN213813753U - Multipoint zero-magnetic-flux current sensor - Google Patents
Multipoint zero-magnetic-flux current sensor Download PDFInfo
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- CN213813753U CN213813753U CN202022817565.2U CN202022817565U CN213813753U CN 213813753 U CN213813753 U CN 213813753U CN 202022817565 U CN202022817565 U CN 202022817565U CN 213813753 U CN213813753 U CN 213813753U
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Abstract
The utility model relates to a current sensor of zero magnetic flux of multiple spot belongs to the sensor field, and this current sensor includes detection circuitry, subtraction circuit, amplifier circuit and the signal processing circuit that once connects, and the electric current signal that awaits measuring turns into the voltage difference behind detection circuitry, handles the back through subtraction circuit and amplifier circuit, turns into the electric current and shows with the voltage difference by the signal processing circuit. The utility model discloses a current sensor, the reaction is rapid, and the measurement is accurate to circuit structure is simple, can reduce industrial manufacturing cost.
Description
Technical Field
The utility model relates to a sensor field especially relates to a current sensor of zero magnetic flux of multiple spot.
Background
The current sensor is a detection device which can sense the information of the current to be detected and convert the detected information into an electric signal meeting certain standard requirements or information in other required forms according to a certain rule and output the electric signal or the information in other required forms so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
In the existing zero-flux current sensor technology, a hall element is used as a sensing element and is used as the most part, when a current-carrying conductor is detected, a magnetic induction line on the current-carrying conductor is in small contact with the hall element, so that the hall element has poor amplification effect on the detected current, low response speed and poor detection effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a current sensor of zero magnetic flux of multiple spot, the reaction is rapid, measures the accuracy.
In order to achieve the above object, the utility model provides a following scheme:
a multipoint zero-flux current sensor comprises a detection circuit, a subtraction circuit, an amplification circuit and a signal processing circuit;
the detection circuit, the subtraction circuit, the amplification circuit and the signal processing circuit are connected in sequence.
Optionally, the current sensor further includes: and the voltage stabilizing circuit is respectively connected with the detection circuit, the subtraction circuit, the amplifying circuit and the signal processing circuit.
Optionally, the detection circuit is a tenth resistor, two ends of the tenth resistor are respectively connected to the current signals to be detected, and two ends of the tenth resistor are further connected to the subtraction circuit.
Optionally, the subtraction circuit includes: the second operational amplifier, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the second capacitor and the third capacitor;
the fifth resistor is connected in series between the pin 1 of the second operational amplifier and one end of the tenth resistor; the seventh resistor is connected in series between the pin 1 of the second operational amplifier and the pin 3 of the second operational amplifier, and the second capacitor is connected in parallel with the seventh resistor;
the sixth resistor is connected in series between the pin 2 of the second operational amplifier and the other end of the tenth resistor;
the pin 3 of the second operational amplifier is connected with the amplifying circuit;
the eighth resistor is connected with the third capacitor in parallel; the anode of the third capacitor is connected with the 2 pin of the second operational amplifier, and the cathode of the third capacitor is connected with the voltage stabilizing circuit;
the 4 pins of the second operational amplifier are grounded;
and the 5 pins of the second operational amplifier are connected with the signal processing circuit.
Optionally, the amplifying circuit includes: the third operational amplifier, a third resistor, a fourth resistor, a ninth resistor and a fourth capacitor;
the ninth resistor is connected between the 1 pin of the third operational amplifier and the subtraction circuit in series; the fourth capacitor is connected in series between the pin 1 of the third operational amplifier and the pin 3 of the third operational amplifier, and the fourth resistor is connected in parallel with the fourth capacitor;
the pin 2 of the third operational amplifier is connected with the voltage stabilizing circuit;
the third resistor is connected in series between the pin 3 of the third operational amplifier and the signal processing circuit;
the 4 pins of the third operational amplifier are grounded;
and the pin 5 of the third operational amplifier is connected with the signal processing circuit.
Optionally, the signal processing circuit includes a single chip microcomputer, a display and a first capacitor;
the 6 pins of the single chip microcomputer are respectively connected with the subtraction circuit and the amplification circuit;
a 19 pin of the single chip microcomputer is connected with a 7 pin of the display, and a 20 pin of the single chip microcomputer is connected with a 6 pin of the display;
the 4 pins of the single chip microcomputer are grounded;
the pin 1 of the display is connected with the pin 6 of the singlechip through an inductor;
the positive pole of the first capacitor is connected with the 6 pins of the single chip microcomputer, and the negative pole of the first capacitor is grounded.
Optionally, the voltage stabilizing circuit includes: the circuit comprises a first operational amplifier, a first resistor and a second resistor;
a pin 1 of the first operational amplifier is connected with a pin 3 of the first operational amplifier, and the pin 3 of the first operational amplifier is respectively connected with the subtraction circuit and the amplification circuit;
the pin 2 of the first operational amplifier is connected with the second resistor in series and then grounded; the first resistor is connected in series between the pin 2 of the first operational amplifier and the signal processing circuit;
the 4 pins of the first operational amplifier are grounded;
and the 5 pins of the first operational amplifier are connected with the signal processing circuit.
Optionally, the model of the single chip microcomputer is STM8S003F3U 6.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect: the multi-point zero-flux current sensor of the utility model connects the detection circuit, the subtraction circuit, the amplifying circuit and the signal processing circuit in sequence, can accurately measure the current to be measured, and has rapid response; the current sensor has simple circuit and can reduce the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of the multipoint zero-flux current sensor provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In this patent document, the drawings discussed below and the various embodiments used to describe the principles of the present disclosure are by way of illustration only and should not be construed in a limiting sense. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concepts. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of the features, integers, steps, acts, or combinations thereof disclosed in the specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
The utility model aims at providing a current sensor of zero magnetic flux of multiple spot, the reaction is rapid, measures the accuracy.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
A multipoint zero-flux current sensor comprises a detection circuit, a subtraction circuit, an amplification circuit and a signal processing circuit.
The detection circuit, the subtraction circuit, the amplification circuit and the signal processing circuit are sequentially connected and provide working voltage through the voltage stabilizing circuit.
The detection circuit is a tenth resistor R10, two ends of the tenth resistor R10 are respectively connected with the current signal to be detected, and two ends of the tenth resistor R10 are also connected with the subtraction circuit. The current to be measured flows through the tenth resistor R10 and is converted into a voltage difference for processing by the following circuit.
The subtraction circuit includes: the circuit comprises a second operational amplifier U2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second capacitor C2 and a third capacitor.
A fifth resistor R5 is connected in series between the pin 1 of the second operational amplifier U2 and one end of the tenth resistor R10; a seventh resistor R7 is connected in series between the pin 1 of the second operational amplifier U2 and the pin 3 of the second operational amplifier U2, and the second capacitor C2 is connected in parallel with the seventh resistor R7. A sixth resistor R6 is connected in series between the pin 2 of the second operational amplifier U2 and the other end of the tenth resistor R10; a pin 3 of the second operational amplifier U2 is connected with the amplifying circuit; the output terminal of the second op-amp U2 outputs the voltage difference across the tenth resistor R10.
The eighth resistor R8 is connected with the third capacitor in parallel; the anode of the third capacitor is connected with the 2 pin of the second operational amplifier U2, and the cathode of the third capacitor is connected with the voltage stabilizing circuit.
The 4 pins of the second operational amplifier U2 are grounded; and the 5 pins of the second operational amplifier U2 are connected with the signal processing circuit.
The amplifying circuit includes: the circuit comprises a third operational amplifier U3, a third resistor R3, a fourth resistor R4, a ninth resistor R9 and a fourth capacitor C4.
A ninth resistor R9 is connected between the pin 1 of the third operational amplifier U3 and the subtraction circuit in series; a fourth capacitor C4 is connected in series between the pin 1 of the third operational amplifier U3 and the pin 3 of the third operational amplifier U3, and a fourth resistor R4 is connected in parallel with the fourth capacitor C4.
A pin 2 of the third operational amplifier U3 is connected with a voltage stabilizing circuit; a third resistor R3 is connected between the pin 3 of the third operational amplifier U3 and the signal processing circuit in series; the 4 pins of the third operational amplifier U3 are grounded; and a pin 5 of the third operational amplifier U3 is connected with the signal processing circuit.
The signal processing circuit comprises a singlechip A1, a display J1 and a first capacitor C1; the amplified voltage signal input by the singlechip A1 is converted into current number which is displayed through a display J1 value.
The model of the single chip microcomputer A1 in the utility model is STM8S003F3U 6.
The pin 6 of the singlechip A1 is respectively connected with the subtraction circuit and the amplifying circuit.
A pin 19 of the singlechip A1 is connected with a pin 7 of the display J1, and a pin 20 of the singlechip A1 is connected with a pin 6 of the display J1; the 4 pins of the singlechip A1 are grounded.
The 1 pin of the display J1 is connected with the 6 pin of the singlechip A1 through an inductor.
The positive pole of the first capacitor C1 is connected with the 6 pins of the singlechip A1, and the negative pole of the first capacitor C1 is grounded.
The voltage stabilizing circuit includes: the circuit comprises a first operational amplifier U1, a first resistor RI and a second resistor R2.
The 1 pin of the first operational amplifier U1 is connected with the 3 pin of the first operational amplifier U1, and the 3 pin of the first operational amplifier U1 is respectively connected with the 2 pin of the second operational amplifier U2 and the negative electrode of the third capacitor.
The 2 pin of the first operational amplifier U1 is connected with the second resistor R2 in series and then grounded; a first resistor R1 is connected between the pin 2 of the first operational amplifier U1 and the signal processing circuit in series; the 4 pins of the first operational amplifier U1 are grounded; the 5 pins of the first operational amplifier U1 are connected with the 1 pin of the display J1 through an inductor.
The multi-point zero-flux current sensor of the utility model connects the detection circuit, the subtraction circuit, the amplifying circuit and the signal processing circuit in sequence, can accurately measure the current to be measured, and has rapid response; the current sensor has simple circuit and can reduce the production cost.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. A multipoint zero-flux current sensor is characterized by comprising a detection circuit, a subtraction circuit, an amplification circuit and a signal processing circuit;
the detection circuit, the subtraction circuit, the amplification circuit and the signal processing circuit are connected in sequence.
2. The multipoint zero flux current sensor according to claim 1, further comprising: and the voltage stabilizing circuit is respectively connected with the detection circuit, the subtraction circuit, the amplifying circuit and the signal processing circuit.
3. The multipoint zero-flux current sensor according to claim 2, wherein the detection circuit is a tenth resistor, two ends of the tenth resistor are respectively connected to the current signals to be detected, and two ends of the tenth resistor are further connected to the subtraction circuit.
4. The multipoint zero flux current sensor of claim 3, wherein said subtraction circuit comprises: the second operational amplifier, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the second capacitor and the third capacitor;
the fifth resistor is connected in series between the pin 1 of the second operational amplifier and one end of the tenth resistor; the seventh resistor is connected in series between the pin 1 of the second operational amplifier and the pin 3 of the second operational amplifier, and the second capacitor is connected in parallel with the seventh resistor;
the sixth resistor is connected in series between the pin 2 of the second operational amplifier and the other end of the tenth resistor;
the pin 3 of the second operational amplifier is connected with the amplifying circuit;
the eighth resistor is connected with the third capacitor in parallel; the anode of the third capacitor is connected with the 2 pin of the second operational amplifier, and the cathode of the third capacitor is connected with the voltage stabilizing circuit;
the 4 pins of the second operational amplifier are grounded;
and the 5 pins of the second operational amplifier are connected with the signal processing circuit.
5. The multipoint zero flux current sensor of claim 2, wherein said amplifying circuit comprises: the third operational amplifier, a third resistor, a fourth resistor, a ninth resistor and a fourth capacitor;
the ninth resistor is connected between the 1 pin of the third operational amplifier and the subtraction circuit in series; the fourth capacitor is connected in series between the pin 1 of the third operational amplifier and the pin 3 of the third operational amplifier, and the fourth resistor is connected in parallel with the fourth capacitor;
the pin 2 of the third operational amplifier is connected with the voltage stabilizing circuit;
the third resistor is connected in series between the pin 3 of the third operational amplifier and the signal processing circuit;
the 4 pins of the third operational amplifier are grounded;
and the pin 5 of the third operational amplifier is connected with the signal processing circuit.
6. The multipoint zero flux current sensor according to claim 2, wherein said signal processing circuit comprises a single chip, a display and a first capacitor;
the 6 pins of the single chip microcomputer are respectively connected with the subtraction circuit and the amplification circuit;
a 19 pin of the single chip microcomputer is connected with a 7 pin of the display, and a 20 pin of the single chip microcomputer is connected with a 6 pin of the display;
the 4 pins of the single chip microcomputer are grounded;
the pin 1 of the display is connected with the pin 6 of the singlechip through an inductor;
the positive pole of the first capacitor is connected with the 6 pins of the single chip microcomputer, and the negative pole of the first capacitor is grounded.
7. The multipoint zero flux current sensor of claim 3, wherein said regulation circuit comprises: the circuit comprises a first operational amplifier, a first resistor and a second resistor;
a pin 1 of the first operational amplifier is connected with a pin 3 of the first operational amplifier, and the pin 3 of the first operational amplifier is respectively connected with the subtraction circuit and the amplification circuit;
the pin 2 of the first operational amplifier is connected with the second resistor in series and then grounded; the first resistor is connected in series between the pin 2 of the first operational amplifier and the signal processing circuit;
the 4 pins of the first operational amplifier are grounded;
and the 5 pins of the first operational amplifier are connected with the signal processing circuit.
8. The multipoint zero-flux current sensor according to claim 6, wherein said single chip microcomputer is model STM8S003F3U 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022817565.2U CN213813753U (en) | 2020-11-30 | 2020-11-30 | Multipoint zero-magnetic-flux current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022817565.2U CN213813753U (en) | 2020-11-30 | 2020-11-30 | Multipoint zero-magnetic-flux current sensor |
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| Publication Number | Publication Date |
|---|---|
| CN213813753U true CN213813753U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022817565.2U Active CN213813753U (en) | 2020-11-30 | 2020-11-30 | Multipoint zero-magnetic-flux current sensor |
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| CN (1) | CN213813753U (en) |
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- 2020-11-30 CN CN202022817565.2U patent/CN213813753U/en active Active
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