Hall acquisition circuit and control circuit
By designing a Hall acquisition circuit that uses Hall sensor to output carrier signals inversely, the existing Hall detection circuit is solved, and the problems of mistriggering, high power consumption and inaccurate detection are achieved, and higher reliability and anti-interference ability are achieved.
Patent Information
- Application Number
- CN202421004589.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-10
AI Technical Summary
Existing Hall detection circuits are prone to problems such as false triggering, high power consumption and inaccurate detection, resulting in low reliability.
A Hall acquisition circuit is designed to form a reverse carrier signal by receiving external carrier signals and using the characteristics of the Hall sensor to reverse output to determine the working condition of the Hall sensor. The circuit includes a target input terminal, a first current limit decoupling circuit, a Hall sensor, a second current limit decoupling circuit, a pull-up resistor, and a target output terminal.
By converting static levels into dynamic signals, the dynamic signals reflect the working conditions of the Hall sensor, improving the reliability and anti-interference ability of the Hall detection circuit.
Smart Images
Figure CN222636280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of integrated circuits, in particular to a Hall acquisition circuit and a control circuit. Background Art
[0002] The typical circuit of the Hall sensor is composed of a Hall element, a power supply, an output circuit, and a signal processing circuit. The Hall element is responsible for converting the magnetic field signal into a voltage signal, the power supply provides the working voltage for the Hall element, the output circuit amplifies and processes the voltage signal, and the signal processing circuit further processes and interprets the output signal. Such a circuit structure can achieve accurate measurement and control of the magnetic field and is widely used in industrial automation, electronic equipment, and automobiles.
[0003] Traditional Hall acquisition circuits are prone to false triggering due to the use of level detection for level signal processing. In addition, existing Hall detection circuits often have high power consumption and inaccurate detection. Therefore, how to improve the reliability of Hall detection circuits is a technical issue that needs to be studied urgently in the industry. Utility Model Content
[0004] The utility model provides a Hall acquisition circuit and a control circuit to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0005] Provided is a Hall acquisition circuit, comprising a target input terminal, a first current limiting decoupling circuit, a Hall sensor, a second current limiting decoupling circuit, a pull-up resistor and a target output terminal.
[0006] Furthermore, the target input end is connected to the input end of the Hall sensor through a first current limiting decoupling circuit; the output end of the Hall sensor is connected to the target output end through a second current limiting decoupling circuit; one end of the pull-up resistor is connected to the output end of the Hall sensor, and the other end of the pull-up resistor is connected to an external pull-up power supply; the target input end is used to receive a carrier signal; the carrier signal is acted on the input end of the Hall sensor after being current limited and decoupled by the first current limiting decoupling circuit; the Hall sensor is used to reversely output the carrier signal to obtain a reverse carrier signal, and the reverse carrier signal acts on the target output end through the second current limiting decoupling circuit.
[0007] Further, the first current limiting decoupling circuit includes a first resistor and a first capacitor; one end of the first resistor is connected to the target input terminal, the other end of the first resistor is respectively connected to one end of the first capacitor and the input terminal of the Hall sensor, and the other end of the first capacitor is respectively connected to the ground terminal of the Hall sensor and the ground.
[0008] Furthermore, the second current limiting decoupling circuit includes a third resistor and a second capacitor; one end of the third resistor is respectively connected to one end of the pull-up resistor, the output end of the Hall sensor and one end of the second capacitor, the other end of the third resistor is connected to the target output end, and one end of the second capacitor is connected to the ground.
[0009] Furthermore, the Hall sensor model is AT253.
[0010] Furthermore, the resistance of the first resistor is 100Ω to 200Ω.
[0011] Furthermore, the resistance of the third resistor is 100Ω to 200Ω.
[0012] Furthermore, the resistance of the pull-up resistor is 10KΩ to 20KΩ.
[0013] Furthermore, the capacitance of the first capacitor is 0.1 μF to 0.01 μF.
[0014] Furthermore, the capacitance of the second capacitor is 1nF to 10nF.
[0015] Furthermore, the external pull-up power supply is 5V.
[0016] On the other hand, a control circuit is provided, comprising a single chip microcomputer and a Hall acquisition circuit according to any one of the above technical solutions.
[0017] The single-chip microcomputer is provided with a first input terminal, a first output terminal and a second output terminal; the first output terminal of the single-chip microcomputer is connected to the target input terminal, and the first input terminal of the single-chip microcomputer is connected to the target output terminal; the single-chip microcomputer is used to output a carrier signal through the first output terminal, and when the first input terminal of the single-chip microcomputer receives the reverse carrier signal, the second output terminal of the single-chip microcomputer is an output control signal.
[0018] Among them, preferably, the model of the single chip microcomputer is C32F7062AOM.
[0019] The beneficial effect of the utility model is that the Hall acquisition circuit receives an external carrier signal and utilizes the characteristics of the Hall sensor to reverse the carrier signal when it is working. Thus, a reverse carrier signal is formed, and the working condition of the Hall sensor is determined by judging the reverse carrier signal. Compared with the prior art, the present application converts the static level into a dynamic signal and utilizes the dynamic signal to reflect the working condition of the Hall sensor, so that the entire Hall acquisition circuit has higher reliability and anti-interference ability. On the other hand, the present application also provides a control circuit, which has similar beneficial effects to the Hall acquisition circuit, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.
[0021] Figure 1 This is a schematic diagram of the Hall acquisition circuit structure;
[0022] Figure 2 This is a schematic diagram of the connection structure between the Hall acquisition circuit and the microcontroller pins;
[0023] Figure 3 This is a timing diagram of the carrier signal and the reverse carrier signal. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
[0025] The working principle of Hall sensor is based on Hall effect, which is a magnetoelectric effect. The Hall effect describes that when the carriers (such as electrons or holes) in a conductor or semiconductor move in a magnetic field perpendicular to the direction of the current, a voltage difference will be generated inside the conductor. This voltage difference is called Hall voltage. Hall sensor uses this phenomenon to detect the presence and strength of the magnetic field, which can then be converted into an electrical signal for measurement and control.
[0026] refer to Figure 1 , Figure 2 and Figure 3 . Figure 1 It is a schematic diagram of the structure of a Hall acquisition circuit; Figure 2 This is a schematic diagram of the connection structure between the Hall acquisition circuit and the microcontroller pins; Figure 3 It is a timing diagram of the carrier signal and the reverse carrier signal. The upper part of the figure is the carrier signal, and the lower part is the reverse carrier signal. A represents a high level and B represents a low level.
[0027] A Hall acquisition circuit comprises a target input terminal S1, a first current limiting decoupling circuit 100, a Hall sensor H1, a second current limiting decoupling circuit 200, a pull-up resistor R2 and a target output terminal S2.
[0028] The target input terminal S1 is connected to the input terminal of the Hall sensor H1 through the first current limiting decoupling circuit 100, and the output terminal of the Hall sensor H1 is connected to the target output terminal S2 through the second current limiting decoupling circuit 200. One end of the pull-up resistor R2 is connected to the output terminal of the Hall sensor H1, and the other end of the pull-up resistor R2 is connected to an external pull-up power supply.
[0029] The target input terminal S1 is used to receive a carrier signal, and the carrier signal acts on the input terminal of the Hall sensor H1 after being current limited and decoupled by the first current limiting decoupling circuit 100. The Hall sensor H1 is used to reversely output the carrier signal to obtain a reverse carrier signal, and the reverse carrier signal acts on the target output terminal S2 through the second current limiting decoupling circuit 200.
[0030] This Hall acquisition circuit receives an external carrier signal and utilizes the characteristics of the Hall sensor H1. When it is working, it can reverse the carrier signal to form a reverse carrier signal. The working condition of the Hall sensor H1 is determined by judging the reverse carrier signal. Compared with the prior art, this application converts the static level into a dynamic signal and uses the dynamic signal to reflect the working condition of the Hall sensor H1. This makes the entire Hall acquisition circuit have higher reliability and anti-interference ability.
[0031] In order to maintain the integrity of the carrier signal, in some further specific examples, the first current limiting decoupling circuit 100 includes: a first resistor R1 and a first capacitor C1. One end of the first resistor R1 is connected to the target input terminal S1, the other end of the first resistor R1 is respectively connected to one end of the first capacitor R1 and the input terminal of the Hall sensor H1, and the other end of the first capacitor R1 is respectively connected to the ground terminal of the Hall sensor H1 and the ground.
[0032] In order to maintain the integrity of the carrier signal, in some further specific examples, the second current limiting decoupling circuit 200 includes: a third resistor R3 and a second capacitor C2. One end of the third resistor R3 is respectively connected to one end of the pull-up resistor R2, the output end of the Hall sensor H1, and one end of the second capacitor C2, the other end of the third resistor R3 is connected to the target output end S2, and one end of the second capacitor C2 is connected to the ground.
[0033] As for the model of the Hall sensor H1, in some further specific examples, the Hall sensor model is AT253.
[0034] The optional range of the resistance of the first resistor R1 and the third resistor R3 is 100Ω to 200Ω, and the specific embodiment adopts 100Ω.
[0035] The resistance value of the pull-up resistor can be selected in the range of 10KΩ to 20KΩ, and this specific embodiment adopts 10KΩ.
[0036] The optional range of the capacitance of the first capacitor is 0.1 μF to 0.01 μF, and the capacitance of the first capacitor is 0.1 μF in this specific embodiment.
[0037] The optional range of the capacitance of the second capacitor is 1 nF to 10 nF, and 1 nF is used in this specific embodiment.
[0038] On the other hand, the present application further provides a control circuit, which includes a single chip microcomputer 300 and a Hall acquisition circuit described in any one of the above specific embodiments.
[0039] The single-chip microcomputer 300 is provided with a first input terminal, a first output terminal and a second output terminal. The first output terminal of the single-chip microcomputer 300 is connected to the target input terminal S1, and the first input terminal of the single-chip microcomputer 300 is connected to the target output terminal S2. The single-chip microcomputer 300 is used to output a carrier signal through the first output terminal. After the first input terminal of the single-chip microcomputer 300 receives the reverse carrier signal, the second output terminal of the single-chip microcomputer 300 outputs a control signal.
[0040] One end of the first resistor R1 is connected to the first output end of the single-chip microcomputer 300, and the first output end outputs a carrier signal, which is decoupled by the current limiting current limiting circuit 100 and output to the input end of the Hall sensor H1. When the Hall sensor H1 senses a magnetic field signal, it will output a reverse carrier signal through the output end, which is output to the first input end of the single-chip microcomputer 300 through the current limiting current limiting circuit 200. At this time, a dynamic carrier signal is received. When there is no magnetic field signal, the external pull-up power supply outputs a high-level signal, which is output to the first input end of the single-chip microcomputer 300 through the second current limiting circuit 200. At this time, a static level signal is received. After receiving the output signal, the single-chip microcomputer 300 performs a calculation comparison. If the obtained signal is a reverse carrier signal of the carrier signal, the single-chip microcomputer 300 will control the load circuit to work through the second output end.
[0041] At the same time, the single-chip microcomputer 300 outputs a carrier signal, which is output to the Hall sensor H1 through the first current limiting decoupling circuit 100. When the Hall sensor H1 has been in a state of no magnetic field signal for a certain period of time, the single-chip microcomputer 300 continues to receive a high-level signal, and will change from continuously outputting the carrier signal to outputting it once every certain period of time, ensuring that it will not be in a long-term working state, generating a resistance voltage drop, thereby causing power consumption problems.
[0042] Although the description of the present application has been quite detailed and particularly describes the embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims by reference to the attached claims, taking into account the prior art, so as to effectively cover the intended scope of the present application. In addition, the above description of the present application is based on the embodiments foreseeable by the inventor, and its purpose is to provide a useful description, and those non-substantial changes to the present application that have not yet been foreseen may still represent equivalent changes to the present application.
Claims
1. A Hall acquisition circuit, characterized in that: It includes a target input end, a first current limiting decoupling circuit, a Hall sensor, a second current limiting decoupling circuit, a pull-up resistor and a target output end; the target input end is connected to the input end of the Hall sensor through the first current limiting decoupling circuit; the output end of the Hall sensor is connected to the target output end through the second current limiting decoupling circuit; one end of the pull-up resistor is connected to the output end of the Hall sensor, and the other end of the pull-up resistor is connected to an external pull-up power supply; the target input end is used to receive a carrier signal; the carrier signal acts on the input end of the Hall sensor after being current limited and decoupled by the first current limiting decoupling circuit; the Hall sensor is used to reversely output the carrier signal to obtain a reverse carrier signal, and the reverse carrier signal acts on the target output end through the second current limiting decoupling circuit.
2. A Hall acquisition circuit according to claim 1, characterized in that: The first current limiting decoupling circuit includes a first resistor and a first capacitor; one end of the first resistor is connected to the target input end, the other end of the first resistor is respectively connected to one end of the first capacitor and the input end of the Hall sensor, and the other end of the first capacitor is respectively connected to the ground end of the Hall sensor and the ground.
3. A Hall acquisition circuit according to claim 1, characterized in that: The second current limiting decoupling circuit includes a third resistor and a second capacitor; one end of the third resistor is respectively connected to one end of the pull-up resistor, the output end of the Hall sensor and one end of the second capacitor, the other end of the third resistor is connected to the target output end, and one end of the second capacitor is connected to the ground.
4. A Hall acquisition circuit according to claim 1, characterized in that: The Hall sensor model is AT253.
5. A Hall acquisition circuit according to claim 1, characterized in that: The resistance of the pull-up resistor is 10KΩ to 20KΩ.
6. A Hall acquisition circuit according to claim 2, characterized in that: The capacitance of the first capacitor is 0.1 μF to 0.01 μF.
7. A Hall acquisition circuit according to claim 2, characterized in that: The resistance of the first resistor is 100Ω to 200Ω.
8. A Hall acquisition circuit according to claim 3, characterized in that: The resistance of the third resistor is 100Ω to 200Ω.
9. A Hall acquisition circuit according to claim 3, characterized in that: The capacitance of the second capacitor is 1nF to 10nF.
10. A control circuit, characterized in that: It comprises a single chip microcomputer and the Hall acquisition circuit according to any one of claims 1 to 9; the single chip microcomputer is provided with a first input terminal, a first output terminal and a second output terminal; the first output terminal of the single chip microcomputer is connected to the target input terminal, and the first input terminal of the single chip microcomputer is connected to the target output terminal; the single chip microcomputer is used to output a carrier signal through the first output terminal, and when the first input terminal of the single chip microcomputer receives the reverse carrier signal, the second output terminal of the single chip microcomputer outputs a control signal.