Pulse width output handle rocker switch sensor circuit

Abstract

The utility model discloses a handle rocker switch sensor circuit with pulse width output, which comprises a handle rocker switch, a magnet, a power supply module, a Hall module and an output protection circuit, the magnet moves along with the handle rocker switch, the Hall module and the output protection circuit are both connected with the power supply module, the Hall module is connected with the output protection circuit, and the output protection circuit is connected with the Hall module. The Hall module is arranged in the magnetic field range of the magnet and can generate a voltage signal according to the change of the magnetic field, so that various different input voltage conditions can be better coped with, different application scenes can be adapted, PWM signals can be output, accurate control on the output signals can be realized by adjusting the duty ratio of the PWM signals, and the control precision is improved. Therefore, requirements of different applications are met, influence of factors such as environmental interference is avoided, and the control effect is stable.

Description

Technical Field

[0001] The utility model relates to a handle rocker switch sensor circuit with pulse width output. Background Art

[0002] The existing joysticks on the market are sensors for controlling the operation of mechanical mechanisms. They are mainly composed of a handle and a device for detecting the state of the handle. The existing joysticks cannot meet a wide range of functional states to better control aerial work booms in the field of engineering machinery. They have low reliability and safety. The power supply can only be a single solid power supply, so the power supply range is narrow and the applicability is poor. They cannot meet people's needs for different applications and are easily affected by factors such as environmental interference. The control effect is unstable. Utility Model Content

[0003] The purpose of the present invention is to solve the problems raised in the above background technology and to provide a handle rocker switch sensor circuit with pulse width output. The utility model can adjust the duty cycle of the PWM signal, thereby achieving precise control of the output signal.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A handle rocker switch sensor circuit with pulse width output includes a handle rocker switch and a magnet. The magnet is arranged on the handle rocker switch and can follow the movement of the handle rocker switch. The circuit also includes a power module, a Hall module, and an output protection circuit. The Hall module and the output protection circuit are both connected to the power module, and the Hall module is connected to the output protection circuit. The Hall module is arranged within the magnetic field range of the magnet and can generate a voltage signal according to changes in the magnetic field.

[0006] Preferably, the power supply module includes an input power supply, a protection circuit, an anti-interference filtering module, and a voltage conversion module. The input power supply is connected to the protection circuit, and the protection circuit is connected to the voltage conversion module through the anti-interference filtering module. The input power supply adopts a power supply with a wide voltage range.

[0007] Preferably, the protection circuit includes a transient voltage suppressor diode TVS1 and a diode D1, the input power supply is connected to the ground terminal GND0 through the transient voltage suppressor diode TVS1, the input power supply is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected to the anti-interference filter module.

[0008] Preferably, the anti-interference filtering module includes capacitor C1, capacitor C2, capacitor C3, magnetic bead FB1, magnetic bead FB2 and resistor R1. The negative pole of diode D1 is connected to one end of resistor R1 through magnetic bead FB1, and the other end of resistor R1 is connected to analog ground AGND through capacitor C1. Magnetic bead FB2 is connected between ground terminal GND0 and analog ground AGND, and capacitor C2 and capacitor C3 are both connected in parallel with capacitor C1.

[0009] Preferably, the voltage conversion module includes a capacitor C4, a capacitor C5 and a linear regulator U1, the capacitor C4 is connected in parallel with the capacitor C3, the input terminal VIN of the linear regulator U1 is connected to the analog ground AGND through the capacitor C4, the input terminal VIN of the linear regulator U1 is connected to the enable terminal CE of the linear regulator U1, the enable terminal VSS of the linear regulator U1 is connected to the analog ground AGND, the output terminal VOUT of the linear regulator U1 outputs the stepped-down DC power supply VCC, and the output terminal VOUT of the linear regulator U1 is connected to the analog ground AGND through the capacitor C5.

[0010] Preferably, the model of the linear regulator U1 is XC6702D501PR-G.

[0011] Preferably, the Hall module includes a Hall chip U2 and a capacitor C6. The power input terminal of the Hall chip U2 is connected to the DC power supply VCC, the power input terminal VSUP of the Hall chip U2 is connected to the analog ground AGND through the capacitor C6, the ground terminal GND and the test terminal TEST of the Hall chip U2 are both connected to the analog ground AGND, and the output terminal OUT1 of the Hall chip U2 is connected to the output protection circuit.

[0012] Preferably, the model of the Hall chip U2 is HAR3930DJ-A.

[0013] Preferably, the output protection circuit includes capacitor C7, capacitor C8, resistor R2, resistor R3, diode D2, diode D3 and transient voltage suppression diode TVS2. The output end OUT1 of the Hall chip U2 is connected to the analog ground AGND through capacitor C7, capacitor C8 is connected in parallel with capacitor C7, the output end OUT1 of the Hall chip U2 is connected to the positive electrode of diode D2 through resistor R2, the negative electrode of diode D2 is connected to the negative electrode of diode D1 through diode D3, the negative electrode of diode D2 is connected to the DC power supply VCC, the positive electrode of diode D2 is connected to one end of resistor R3, the other end of resistor R3 is connected to the ground end GND0 through transient voltage suppression diode TVS2, and the other end of resistor R3 outputs a PWM signal with adjustable duty cycle and stability.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The power module adopts a wide voltage range input, which can better cope with various input voltage conditions to adapt to different application scenarios;

[0016] 2. A protection circuit is installed at the input interface of the power module. The transient voltage suppressor diode TVS1 is used to protect the power input port to prevent the instantaneous voltage surge at the port from damaging the subsequent circuit. In addition, an anti-reverse polarity diode D1 is added to prevent reverse polarity of the power supply and protect the circuit from damage caused by reverse current.

[0017] 3. The magnetic beads used in the power module are mainly used to suppress high-frequency noise and spike interference on the power line, making the power supply voltage more stable;

[0018] 4. The output protection circuit outputs PWM signal. By adjusting the duty cycle of the PWM signal, the output signal can be precisely controlled to meet the needs of different applications. It is not affected by environmental interference and other factors, and the control effect is stable.

[0019] 5. The main function of the output protection circuit is to absorb the spike pulses caused by the unstable voltage of the power supply circuit, so as to make the output PWM signal more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a pulse width output handle rocker switch sensor circuit according to an embodiment of the present invention;

[0021] Figure 2 This is a circuit diagram of a power module according to an embodiment of the present invention;

[0022] Figure 3 This is a circuit diagram of a Hall module according to an embodiment of the present invention;

[0023] Figure 4 This is a circuit diagram of an output protection circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings:

[0025] like Figure 1 As shown, a pulse width output handle rocker switch sensor circuit includes a handle rocker switch, a magnet 2, which is mounted on the handle rocker switch and can follow the movement of the handle rocker switch. It also includes a power module 1, a Hall module 3, and an output protection module 4. The Hall module 3 and the output protection module 4 are both connected to the power module 1, and the Hall module 3 is connected to the output protection module 4. The Hall module 3 is positioned within the magnetic field of the magnet 2 and can generate a voltage signal based on changes in the magnetic field. When the handle rocker switch is pressed, the magnet's field strength changes. The Hall chip senses this change in magnet field strength and outputs a signal.

[0026] like Figure 2 As shown, the power supply module 1 includes an input power supply, a protection circuit 11, an anti-interference filtering module 12, and a voltage conversion module 13. The input power supply is connected to the protection circuit 11, and the protection circuit 11 is connected to the voltage conversion module 13 through the anti-interference filtering module 12. The input power supply adopts a power supply with a wide voltage range.

[0027] like Figure 2 As shown, the protection circuit 11 includes a transient voltage suppressor diode TVS1 and a diode D1. The input power supply is connected to the ground terminal GND0 through the transient voltage suppressor diode TVS1. The input power supply is connected to the anode of the diode D1. The cathode of the diode D1 is connected to the anti-interference filter module 12.

[0028] like Figure 2 As shown, the anti-interference filtering module 12 includes a capacitor C1, a capacitor C2, a capacitor C3, a magnetic bead FB1, a magnetic bead FB2 and a resistor R1. The cathode of the diode D1 is connected to one end of the resistor R1 through the magnetic bead FB1, and the other end of the resistor R1 is connected to the analog ground AGND through the capacitor C1. The magnetic bead FB2 is connected between the ground terminal GND0 and the analog ground AGND, and the capacitor C2 and the capacitor C3 are both connected in parallel with the capacitor C1.

[0029] like Figure 2 As shown, the voltage conversion module 13 includes capacitors C4 and C5, and a linear regulator U1. Capacitor C4 is connected in parallel with capacitor C3. The input terminal VIN of the linear regulator U1 is connected to the analog ground AGND via capacitor C4. The input terminal VIN of the linear regulator U1 is connected to the enable terminal CE of the linear regulator U1. The enable terminal VSS of the linear regulator U1 is connected to the analog ground AGND. The output terminal VOUT of the linear regulator U1 outputs the stepped-down DC power supply VCC. The output terminal VOUT of the linear regulator U1 is connected to the analog ground AGND via capacitor C5. The model of the linear regulator U1 is XC6702D501PR-G.

[0030] like Figure 2 As shown, the Hall module 3 includes a Hall chip U2 and a capacitor C6. The power input terminal of the Hall chip U2 is connected to the DC power supply VCC, and the power input terminal VSUP of the Hall chip U2 is connected to the analog ground AGND through the capacitor C6. The ground terminal GND and the test terminal TEST of the Hall chip U2 are both connected to the analog ground AGND. The output terminal OUT1 of the Hall chip U2 is connected to the output protection module 4. The model of the Hall chip U2 is HAR3930DJ-A.

[0031] like Figure 3As shown, the output protection module 4 includes a capacitor C7, a capacitor C8, a resistor R2, a resistor R3, a diode D2, a diode D3 and a transient voltage suppressor diode TVS2. The output end OUT1 of the Hall chip U2 is connected to the analog ground AGND through the capacitor C7, the capacitor C8 is connected in parallel with the capacitor C7, the output end OUT1 of the Hall chip U2 is connected to the positive electrode of the diode D2 through the resistor R2, the negative electrode of the diode D2 is connected to the negative electrode of the diode D1 through the diode D3, the negative electrode of the diode D2 is connected to the DC power supply VCC, the positive electrode of the diode D2 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the ground end GND0 through the transient voltage suppressor diode TVS2, and the other end of the resistor R3 outputs a PWM signal with adjustable duty cycle and stability.

[0032] Here’s how it works:

[0033] like Figure 2 As shown in the figure, the transient voltage suppression diode TVS1 is used at the power input interface of the power module. Its main function is to protect the power input port to prevent the instantaneous voltage shock at the port from causing damage to the subsequent circuit. In addition, an anti-reverse polarity diode D1 is added to prevent the power supply from being reversed due to misoperation and protect the circuit from damage by reverse current. Among them, FB1 and FB2 are magnetic beads mainly used to suppress high-frequency noise and spike interference on the power line. R1 is a current-limiting resistor to prevent excessive current from damaging components on the circuit board. C1, C2, and C3 are filter capacitors to make the power supply voltage more stable. U1 is a linear regulator LDO, among which C4 is the linear regulator input filter capacitor to make the U1 input voltage more stable. C5 is the linear regulator output voltage filter capacitor to make the U1 output voltage more stable.

[0034] like Figure 3 As shown in the figure, U2 in the Hall module is the Hall chip, and C6 is the power input filter capacitor, which makes the power supply voltage of the Hall chip more stable.

[0035] like Figure 4 As shown in the output protection module, C7 and C8 are output filter capacitors, which stabilize the Hall effect chip's output signal. A transient voltage suppressor diode (TVS2) is added to the output PWM signal, effectively protecting precision components in the circuit from surge damage and reducing output signal instability. D2 is a switching diode. The output protection circuit primarily absorbs spikes caused by unstable power supply circuit voltage, thereby stabilizing the output PWM signal. The PWM signal output by this utility model has an adjustable duty cycle.

[0036] The utility model adds a rocker switch sensor circuit as a joystick, which provides a wider range of functional states to better control the aerial work arm vehicle in the field of engineering machinery, so that the reliability and safety of the joystick are improved. The utility model adopts a wide voltage input range in circuit design, which can better adapt to different power input requirements. A transient voltage suppression diode TVS1 protection device is added to the power input interface to prevent electrostatic surges from damaging the subsequent circuit. Similarly, a protection device is added to the output signal to effectively protect the precision components in the circuit from damage by surge pulses, reduce the instability of the output signal, and output a PWM duty cycle signal. By adjusting the duty cycle of the PWM signal, the output signal can be accurately controlled, thereby meeting the needs of different applications, and is not affected by factors such as environmental interference, and the control effect is stable.

[0037] It should be noted that the above is only one specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiment and may be subject to many variations. In short, all variations that can be directly derived or associated with the content of the present invention by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. A pulse width output handle rocker switch sensor circuit, comprising a handle rocker switch and a magnet (2), wherein the magnet (2) is arranged on the handle rocker switch and can follow the movement of the handle rocker switch, characterized in that: The device further comprises a power supply module (1), a Hall module (3), and an output protection module (4); the Hall module (3) and the output protection module (4) are both connected to the power supply module (1); the Hall module (3) is connected to the output protection module (4); the Hall module (3) is arranged within the magnetic field range of the magnet (2) and can generate a voltage signal according to changes in the magnetic field.

2. The handle rocker switch sensor circuit with pulse width output according to claim 1, characterized in that: The power supply module (1) comprises an input power supply, a protection circuit (11), an anti-interference filtering module (12), and a voltage conversion module (13); the input power supply is connected to the protection circuit (11); and the protection circuit (11) is connected to the voltage conversion module (13) via the anti-interference filtering module (12).

3. The handle rocker switch sensor circuit with pulse width output according to claim 2, characterized in that: The protection circuit (11) comprises a transient voltage suppressor diode TVS1 and a diode D1, the input power supply is connected to the ground terminal GND0 via the transient voltage suppressor diode TVS1, the input power supply is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is connected to the anti-interference filter module (12).

4. The pulse width output handle rocker switch sensor circuit according to claim 3, characterized in that: The anti-interference filter module (12) comprises a capacitor C1, a capacitor C2, a capacitor C3, a magnetic bead FB1, a magnetic bead FB2 and a resistor R1; the cathode of the diode D1 is connected to one end of the resistor R1 via the magnetic bead FB1; the other end of the resistor R1 is connected to the analog ground AGND via the capacitor C1; the magnetic bead FB2 is connected between the ground terminal GND0 and the analog ground AGND; the capacitor C2 and the capacitor C3 are both connected in parallel with the capacitor C1.

5. The handle rocker switch sensor circuit with pulse width output according to claim 4, characterized in that: The voltage conversion module (13) comprises a capacitor C4, a capacitor C5, and a linear regulator U1. The capacitor C4 is connected in parallel with the capacitor C3. The input terminal VIN of the linear regulator U1 is connected to the analog ground AGND via the capacitor C4. The input terminal VIN of the linear regulator U1 is connected to the enable terminal CE of the linear regulator U1. The enable terminal VSS of the linear regulator U1 is connected to the analog ground AGND. The output terminal VOUT of the linear regulator U1 outputs a stepped-down DC power supply VCC. The output terminal VOUT of the linear regulator U1 is connected to the analog ground AGND via the capacitor C5.

6. The handle rocker switch sensor circuit with pulse width output according to claim 5, characterized in that: The model of the linear voltage regulator U1 is XC6702D501PR-G.

7. The handle rocker switch sensor circuit with pulse width output according to claim 5, characterized in that: The Hall module (3) comprises a Hall chip U2 and a capacitor C6, wherein the power input terminal of the Hall chip U2 is connected to a DC power supply VCC, the power input terminal VSUP of the Hall chip U2 is connected to an analog ground AGND via the capacitor C6, the ground terminal GND and the test terminal TEST of the Hall chip U2 are both connected to the analog ground AGND, and the output terminal OUT1 of the Hall chip U2 is connected to an output protection module (4).

8. The handle rocker switch sensor circuit with pulse width output according to claim 7, characterized in that: The model of the Hall chip U2 is HAR3930DJ-A.

9. The pulse width output handle rocker switch sensor circuit according to claim 7, characterized in that: The output protection module (4) comprises a capacitor C7, a capacitor C8, a resistor R2, a resistor R3, a diode D2, a diode D3 and a transient voltage suppressor diode TVS2; the output end OUT1 of the Hall chip U2 is connected to the analog ground AGND via the capacitor C7; the capacitor C8 is connected in parallel with the capacitor C7; the output end OUT1 of the Hall chip U2 is connected to the positive electrode of the diode D2 via the resistor R2; the negative electrode of the diode D2 is connected to the negative electrode of the diode D1 via the diode D3; the negative electrode of the diode D2 is connected to a DC power supply VCC; the positive electrode of the diode D2 is connected to one end of the resistor R3; the other end of the resistor R3 is connected to the ground end GND0 via the transient voltage suppressor diode TVS2; and the other end of the resistor R3 outputs a PWM signal with adjustable duty cycle and stability.

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