CN216595275U - Hall current sensor and detection circuit special for automobile - Google Patents
Hall current sensor and detection circuit special for automobile Download PDFInfo
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- CN216595275U CN216595275U CN202122409545.6U CN202122409545U CN216595275U CN 216595275 U CN216595275 U CN 216595275U CN 202122409545 U CN202122409545 U CN 202122409545U CN 216595275 U CN216595275 U CN 216595275U
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Abstract
The utility model discloses a Hall current sensor and a detection circuit special for an automobile, and relates to the technical field of sensors; the power supply comprises a Hall drive circuit, an amplifying circuit and a power supply voltage stabilizing circuit; the Hall drive circuit is provided with a signal input end and a signal output end, the signal input end is connected to the Hall element, and the Hall drive circuit is used for collecting an initial current signal and generating an initial voltage signal; the amplifying circuit is electrically connected with the Hall driving circuit and is used for amplifying the initial voltage signal to the required voltage amplitude; the power supply voltage stabilizing circuit is respectively electrically connected with the Hall drive circuit and the amplifying circuit and is used for providing voltage required by the Hall drive circuit and the amplifying circuit during working; the beneficial effects of the utility model are: the detection of direct current, alternating current and pulse current can be realized, the shell is an openable mode, the design is simplified, the structure is small and exquisite, and the signal output selects the special lead wire for the automobile grade, so that the device has the characteristics of dust prevention, water prevention, shock prevention, acid mist prevention, corrosion prevention and the like.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to a Hall current sensor special for an automobile and a detection circuit.
Background
The current sensor is an electronic component with wide application, and is widely applied to various current transformation technologies, alternating current numerical control devices and other automatic control fields which take current as a control object. The non-contact measurement and monitoring methods for the current are many, and the Hall current sensor is widely applied due to the excellent cost performance to form industrialization; and a full PCB-mounted closed loop type hall current sensor is generally used for measuring and monitoring currents below 100A.
Current sensors in the prior art generally have the defects of large size and complex structure, and detection circuits of the current sensors cannot be simultaneously suitable for detecting direct current, alternating current and pulse current, and have the defects of small application range and high power consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the technology and provides the special Hall current sensor and the detection circuit for the automobile, which can realize the detection of direct current, alternating current and pulse current and have the characteristics of small structure and low power consumption.
The technical scheme of the utility model is realized as follows: the improved detection circuit of the Hall current sensor special for the automobile is characterized by comprising a Hall drive circuit, an amplifying circuit and a power supply voltage stabilizing circuit;
the Hall drive circuit is provided with a signal input end and a signal output end, the signal input end is connected to the Hall element, and the Hall drive circuit is used for collecting an initial current signal and generating an initial voltage signal;
the amplifying circuit is electrically connected with the Hall driving circuit and is used for amplifying the initial voltage signal to a required voltage amplitude;
the power supply voltage stabilizing circuit is respectively electrically connected with the Hall drive circuit and the amplifying circuit and is used for providing voltage required by the Hall drive circuit and the amplifying circuit during working.
In the above structure, the initial current signal is a dc signal, an ac signal, or a pulse signal.
In the above structure, the power supply voltage stabilizing circuit includes a zener diode D2, a PNP type triode Q1, and an adjustable resistor GIN;
the adjustable resistor GIN is arranged between an emitting electrode of the PNP type triode Q1 and a power supply end V +, and the power supply end V + is connected with an adjusting pin of the adjustable resistor GIN; a collector of the PNP type triode Q1 is connected to a first pin of the Hall element, a base of the PNP type triode Q1 is connected with the anode of the voltage stabilizing diode D2, and the voltage stabilizing diode D2 is connected to a power supply end V +;
a resistor R3 is arranged between the base electrode of the PNP type triode Q1 and the grounding end, and a resistor R1 and a resistor R2 which are connected in series are arranged between the base electrode of the PNP type triode Q1 and the power supply end.
In the above structure, the zener diode D2 has three pins, the anode and the cathode of the zener diode D2 are respectively a third pin and a second pin, a capacitor C3 is disposed between the third pin of the zener diode D2 and the power supply terminal V +, and the third pin of the zener diode D2 is connected between the resistors R1 and R2.
In the above structure, the amplifying circuit includes an operational amplifier U1A and an adjustable resistor DFS;
the same-direction input end of the operational amplifier U1A is connected with the fourth pin of the Hall element, the reverse-direction input end of the operational amplifier U1A is connected with the second pin of the Hall element, the reverse-direction input end of the operational amplifier U1A is also connected to the adjusting pin of the adjustable resistor DFS, one end of the adjustable resistor DFS is grounded, and the other end of the adjustable resistor DFS is connected to the first pin of the Hall element;
in the above structure, a capacitor C4 is disposed between the fourth pin of the hall element and the ground, a capacitor C5 is disposed between the second pin of the hall element and the ground, and the third pin of the hall element is connected to the ground;
a resistor R9 is arranged between the equidirectional input end of the operational amplifier U1A and the fourth pin of the Hall element, and a resistor R7 is arranged between the opposite input end of the operational amplifier U1A and the second pin of the Hall element.
In the above structure, a resistor R14 and a capacitor C6 which are connected in parallel are arranged between the inverting input end and the output end of the operational amplifier U1A, the amplifying circuit further includes a standard signal output end OUT, a resistor R15 and a resistor R16 which are connected in series are arranged between the output end of the operational amplifier U1A and the standard signal output end OUT, and a capacitor C7 is arranged between a common end of the resistor R15 and the resistor R16 and a ground end.
In the above structure, the hall driving circuit includes a zener diode D3 and an operational amplifier U1B;
the negative end of the voltage-stabilizing diode D3, the operational amplifier U1B and the homodromous input end are connected to the power supply end V +, the reverse input end of the operational amplifier U1B is connected with the output end of the operational amplifier U1B, and a capacitor C10 and a resistor R10 which are connected in parallel are arranged between the output end of the operational amplifier U1B and the homodromous input end of the operational amplifier U1A;
the positive terminal of the zener diode D3 is grounded, the zener diode D3 has three pins, the positive terminal and the negative terminal of the zener diode D3 are respectively a third pin and a second pin, a resistor R10 is arranged between the first pin of the zener diode D3 and the ground terminal, and a resistor R12 is arranged between the first pin of the zener diode D3 and the negative terminal of the zener diode D3.
The utility model also discloses a special Hall current sensor for the automobile, which is improved in that the sensor comprises a first shell, a second shell, an annular magnetic core and a PCB;
the first shell is provided with a circular groove, the circular magnetic core and the PCB are both arranged in the groove, the Hall element is positioned in a gap of the circular magnetic core, and the second shell cover is arranged at an opening of the groove to seal the circular magnetic core and the PCB in the groove;
the PCB is integrated with the Hall current sensor detection circuit special for the automobile.
Furthermore, the Hall current sensor special for the automobile further comprises a lead wire, a JST 04T-JWPF-VSLE-S rubber shell is selected as a lead wire port, and one end of the lead wire is connected to the PCB.
The utility model has the beneficial effects that: the detection circuit of the Hall current sensor special for the automobile can detect direct current, alternating current and pulse current, and has the characteristics of small shell size and low power consumption.
Drawings
Fig. 1 is a schematic block diagram of a detection circuit of a hall current sensor for an automobile according to the present invention.
Fig. 2 is a schematic circuit diagram of a detection circuit of a hall current sensor for an automobile according to the present invention.
Fig. 3 is a schematic three-dimensional structure diagram of the hall current sensor special for the automobile.
Fig. 4 is an exploded schematic view of a hall current sensor for an automobile according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 and 2, the utility model discloses a detection circuit of a hall current sensor special for an automobile, which comprises a hall driving circuit 10, an amplifying circuit 20 and a power supply voltage stabilizing circuit 30; the Hall drive circuit 10 is provided with a signal input end and a signal output end, the signal input end is connected to the Hall element 40, and the Hall drive circuit 10 is used for collecting an initial current signal and generating an initial voltage signal; the initial current signal is a direct current signal, an alternating current signal or a pulse signal. The amplifying circuit 20 is electrically connected with the hall driving circuit 10 and is used for amplifying the initial voltage signal to a required voltage amplitude; the power voltage stabilizing circuit 30 is electrically connected to the hall driving circuit 10 and the amplifying circuit 20, respectively, and is configured to provide a voltage required by the hall driving circuit 10 and the amplifying circuit 20 during operation.
Referring to fig. 2, for the power supply voltage stabilizing circuit 30, a specific embodiment of the present invention is provided, in which the power supply voltage stabilizing circuit 30 includes a zener diode D2, a PNP-type triode Q1, and an adjustable resistor GIN; the adjustable resistor GIN is arranged between an emitting electrode of the PNP type triode Q1 and a power supply end V +, and the power supply end V + is connected with an adjusting pin of the adjustable resistor GIN; a collector of the PNP type triode Q1 is connected to a first pin of the Hall element 40, a base of the PNP type triode Q1 is connected with the anode of the voltage stabilizing diode D2, and the voltage stabilizing diode D2 is connected to a power supply end V +; a resistor R3 is arranged between the base electrode of the PNP type triode Q1 and the grounding end, and a resistor R1 and a resistor R2 which are connected in series are arranged between the base electrode of the PNP type triode Q1 and the power supply end. The zener diode D2 has three pins, the anode and the cathode of the zener diode D2 are respectively a third pin and a second pin, a capacitor C3 is disposed between the third pin of the zener diode D2 and the power supply terminal V +, and the third pin of the zener diode D2 is connected between the resistors R1 and R2.
With continued reference to fig. 2, for the amplifying circuit 20, the present invention provides a specific embodiment, where the amplifying circuit 20 includes an operational amplifier U1A and an adjustable resistor DFS; the same-direction input end of the operational amplifier U1A is connected with the fourth pin of the Hall element 40, the reverse input end of the operational amplifier U1A is connected with the second pin of the Hall element 40, the reverse input end of the operational amplifier U1A is also connected to the adjusting pin of the adjustable resistor DFS, one end of the adjustable resistor DFS is grounded, and the other end of the adjustable resistor DFS is connected to the first pin of the Hall element 40; a capacitor C4 is arranged between the fourth pin of the hall element 40 and the ground terminal, a capacitor C5 is arranged between the second pin of the hall element 40 and the ground terminal, and the third pin of the hall element 40 is connected with the ground terminal; a resistor R9 is arranged between the equidirectional input end of the operational amplifier U1A and the fourth pin of the Hall element 40, and a resistor R7 is arranged between the inverting input end of the operational amplifier U1A and the second pin of the Hall element 40.
Furthermore, a resistor R14 and a capacitor C6 which are connected in parallel are arranged between the inverting input end and the output end of the operational amplifier U1A, the amplifying circuit 20 further includes a standard signal output end OUT, a resistor R15 and a resistor R16 which are connected in series are arranged between the output end of the operational amplifier U1A and the standard signal output end OUT, and a capacitor C7 is arranged between a common end of the resistor R15 and the resistor R16 and a ground end.
In the above embodiment, for the hall driving circuit 10, the utility model provides a specific embodiment, the hall driving circuit 10 includes a zener diode D3 and an operational amplifier U1B; the negative end of the voltage-stabilizing diode D3, the operational amplifier U1B and the homodromous input end are connected to the power supply end V +, the reverse input end of the operational amplifier U1B is connected with the output end of the operational amplifier U1B, and a capacitor C10 and a resistor R10 which are connected in parallel are arranged between the output end of the operational amplifier U1B and the homodromous input end of the operational amplifier U1A; the positive terminal of the zener diode D3 is grounded, the zener diode D3 has three pins, the positive terminal and the negative terminal of the zener diode D3 are respectively a third pin and a second pin, a resistor R10 is arranged between the first pin of the zener diode D3 and the ground terminal, and a resistor R12 is arranged between the first pin of the zener diode D3 and the negative terminal of the zener diode D3.
Through the structure, the sensor detection circuit utilizes the principles of electromagnetic induction and the Hall effect, when primary side current (Ip) passes through one wire, a magnetic field is generated around the wire, the size of the magnetic field is in direct proportion to the current flowing through the wire, the Hall effect chip senses signals through magnetic core aggregation and directly outputs the signals after amplification by operational amplifier, and the signals output by the Hall device accurately reflect the output condition of the primary side current. Therefore, the Hall current sensor detection circuit special for the automobile can detect direct current, alternating current and pulse current, and has the characteristics of high precision, high linearity, low power consumption and the like.
In addition, the utility model also provides a special Hall current sensor for the automobile, which comprises a first shell 101, a second shell 102, an annular magnetic core 103 and a PCB 104; the first shell 101 is provided with a circular groove, the annular magnetic core 103 and the PCB 104 are both arranged in the groove, the Hall element 40 is positioned in a gap of the annular magnetic core 103, the second shell 102 covers an opening of the groove, and the annular magnetic core 103 and the PCB 104 are sealed in the groove; the detection circuit of the hall current sensor special for the automobile is integrated on the PCB 104. In addition, the Hall current sensor special for the automobile further comprises a lead 105, the port of the lead 105 is made of JST 04T-JWPF-VSLE-S rubber casing, and one end of the lead is connected to the PCB. The Hall current sensor special for the automobile has the advantages of openable structural design, small shell size and convenience in installation.
The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Various modifications and alterations may occur to those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and alterations should be accorded the broadest interpretation so as to encompass all such modifications and alterations.
Claims (10)
1. A detection circuit of a Hall current sensor special for an automobile is characterized by comprising a Hall driving circuit, an amplifying circuit and a power supply voltage stabilizing circuit;
the Hall drive circuit is provided with a signal input end and a signal output end, the signal input end is connected to the Hall element, and the Hall drive circuit is used for collecting an initial current signal and generating an initial voltage signal;
the amplifying circuit is electrically connected with the Hall driving circuit and is used for amplifying the initial voltage signal to the required voltage amplitude;
the power supply voltage stabilizing circuit is respectively electrically connected with the Hall drive circuit and the amplifying circuit and is used for providing voltage required by the Hall drive circuit and the amplifying circuit during working.
2. The Hall current sensor detection circuit for automobile according to claim 1, wherein said initial current signal is a DC signal, an AC signal or a pulse signal.
3. The Hall current sensor detection circuit for automobile according to claim 1, wherein said power supply voltage regulator circuit comprises a zener diode D2, a PNP type triode Q1 and an adjustable resistor GIN;
the adjustable resistor GIN is arranged between an emitting electrode of the PNP type triode Q1 and a power supply end V +, and the power supply end V + is connected with an adjusting pin of the adjustable resistor GIN; a collector of the PNP type triode Q1 is connected to a first pin of the Hall element, a base of the PNP type triode Q1 is connected with the anode of the voltage stabilizing diode D2, and the voltage stabilizing diode D2 is connected to a power supply end V +;
a resistor R3 is arranged between the base electrode of the PNP type triode Q1 and the grounding end, and a resistor R1 and a resistor R2 which are connected in series are arranged between the base electrode of the PNP type triode Q1 and the power supply end.
4. The Hall current sensor detection circuit for automobile according to claim 3, wherein said Zener diode D2 has three pins, the anode and cathode of Zener diode D2 are the third pin and the second pin respectively, a capacitor C3 is disposed between the third pin of Zener diode D2 and the power supply terminal V +, and the third pin of Zener diode D2 is connected between resistors R1 and R2.
5. The Hall current sensor detection circuit for automobile use according to claim 3, wherein said amplification circuit comprises an operational amplifier U1A and an adjustable resistor DFS;
the same-direction input end of the operational amplifier U1A is connected with the fourth pin of the Hall element, the reverse-direction input end of the operational amplifier U1A is connected with the second pin of the Hall element, the reverse-direction input end of the operational amplifier U1A is also connected to the adjusting pin of the adjustable resistor DFS, one end of the adjustable resistor DFS is grounded, and the other end of the adjustable resistor DFS is connected to the first pin of the Hall element.
6. The automotive Hall current sensor detection circuit according to claim 5, wherein a capacitor C4 is disposed between the fourth pin of the Hall element and the ground, a capacitor C5 is disposed between the second pin of the Hall element and the ground, and the third pin of the Hall element is connected to the ground;
a resistor R9 is arranged between the equidirectional input end of the operational amplifier U1A and the fourth pin of the Hall element, and a resistor R7 is arranged between the opposite input end of the operational amplifier U1A and the second pin of the Hall element.
7. The automotive Hall current sensor detection circuit according to claim 5, wherein a resistor R14 and a capacitor C6 are provided in parallel between the inverting input terminal and the output terminal of the operational amplifier U1A, the amplification circuit further comprises a standard signal output terminal OUT, a resistor R15 and a resistor R16 which are connected in series are provided between the output terminal of the operational amplifier U1A and the standard signal output terminal OUT, and a capacitor C7 is provided between a common terminal of the resistor R15 and the resistor R16 and a ground terminal.
8. The Hall current sensor detecting circuit for automobile according to claim 5, wherein said Hall driving circuit comprises a Zener diode D3 and an operational amplifier U1B;
the negative end of the voltage-stabilizing diode D3, the operational amplifier U1B and the homodromous input end are connected to the power supply end V +, the reverse input end of the operational amplifier U1B is connected with the output end of the operational amplifier U1B, and a capacitor C10 and a resistor R10 which are connected in parallel are arranged between the output end of the operational amplifier U1B and the homodromous input end of the operational amplifier U1A;
the positive terminal of the zener diode D3 is grounded, the zener diode D3 has three pins, the positive terminal and the negative terminal of the zener diode D3 are respectively a third pin and a second pin, a resistor R10 is arranged between the first pin of the zener diode D3 and the ground terminal, and a resistor R12 is arranged between the first pin of the zener diode D3 and the negative terminal of the zener diode D3.
9. A Hall current sensor special for an automobile is characterized by comprising a first shell, a second shell, an annular magnetic core and a PCB (printed circuit board);
the first shell is provided with a circular groove, the circular magnetic core and the PCB are both arranged in the groove, the Hall element is positioned in a gap of the circular magnetic core, the second shell covers the opening of the groove, and the circular magnetic core and the PCB are sealed in the groove;
the PCB is integrated with the detection circuit of the Hall current sensor special for the automobile as claimed in any one of claims 1-8.
10. The hall current sensor of claim 9, further comprising a lead wire, wherein the lead wire port is made of JST 04T-JWPF-VSLE-S rubber casing, and one end of the lead wire is connected to the PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122409545.6U CN216595275U (en) | 2021-09-30 | 2021-09-30 | Hall current sensor and detection circuit special for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122409545.6U CN216595275U (en) | 2021-09-30 | 2021-09-30 | Hall current sensor and detection circuit special for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216595275U true CN216595275U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122409545.6U Active CN216595275U (en) | 2021-09-30 | 2021-09-30 | Hall current sensor and detection circuit special for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216595275U (en) |
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2021
- 2021-09-30 CN CN202122409545.6U patent/CN216595275U/en active Active
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