Pedal displacement sensor circuit and assembly
By designing a pedal displacement sensor circuit containing wake-up variable circuit, the problem of lack of wake-up circuits and the risk of single point failure in the traditional system is solved, and a high-reliability and low-cost pedal displacement sensor system is realized.
Patent Information
- Application Number
- CN202510269706.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-06-10
AI Technical Summary
In the existing intelligent braking systems of automobiles, the traditional pedal displacement sensor circuit lacks a wake-up circuit, resulting in the system relying on mechanical rotation devices, which is cost-effective and large in size; the wake-up circuit of another solution is independent of the sensor circuit, and has a risk of single point failure, which cannot meet the system's functional safety needs, and has low product reliability.
A pedal displacement sensor circuit including an electronic control unit module, a pedal displacement sensor module and a pedal acquisition compatible wake-up variable circuit is designed. By combining the wake-up source input variable resistor, the working power supply variable resistor and the wake-up signal output variable diode, the acquisition of the pedal displacement signal and the identification of the wake-up signal are realized.
It effectively improves the reliability of the wake-up signal of the pedal displacement sensor, reduces product production costs, simplifies mechanical structure design, and improves product maintenance and manufacturability.
Smart Images
Figure CN120116899A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of automotive intelligent braking system controllers, and particularly to an assembly of a pedal displacement sensor. Background Art
[0002] A pedal travel sensor (PTS), also known as a throttle pedal position sensor, is installed near the brake pedal. By collecting the stroke and displacement of the pedal, it judges the driving intention. For new energy electric vehicles, when the driver operates the throttle pedal, the sensor captures the input and transmits it to the vehicle's electronic control unit (ECU). Subsequently, by combining the data of other sensors, these signals are processed through algorithms to precisely control the power output of the motor, thereby affecting the vehicle's dynamic performance.
[0003] In the prior art, a traditional PTS circuit does not include a wake-up circuit. That is, when the pedal is pressed under the system sleep state, the pedal and the internal magnet rotate synchronously, and the switch circuit rotates simultaneously, causing the magnetic field intensity inside the switch circuit to change. Subsequently, the change in the magnetic field intensity of the rotating magnet is recognized to output a wake-up signal. This solution is extremely dependent on the mechanical rotation device of the pedal, with a high usage cost and a relatively large overall volume. Another solution is that the wake-up circuit is independent of the PTS circuit and there is only one wake-up line. When the vehicle's brake pedal is stepped on, the brake switch closes, and then the brake switch sends a closed input signal to the ECU. After receiving the closed input signal from the brake switch, the ECU continuously outputs an activation signal to the electronic hydraulic braking system to control the activation and wake-up of the electronic hydraulic braking system. When affected by external magnetic field interference, it cannot be guaranteed whether the wake-up source is real (there is a risk of single-point failure and it cannot meet the system functional safety requirements), resulting in relatively low product reliability. Summary of the Invention
[0004] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an assembly of a pedal displacement sensor.
[0006] To achieve the above purpose, in a first aspect, the present invention provides a pedal displacement sensor circuit, including:
[0007] An electronic control unit module, a pedal displacement sensor module, and a pedal acquisition compatible wake-up variable circuit. The electronic control unit module and the displacement sensor module are electrically connected through the pedal acquisition compatible wake-up variable circuit;
[0008] The electronic control unit module includes a power supply module and a microcontroller module. The power supply module is provided with a power supply network port, a power activation port, and a regulated power source output port. The microcontroller module is provided with a wake-up source identification port and a pedal displacement signal input port;
[0009] The pedal displacement sensor module is provided with a wake-up source input port, a wake-up signal output port, a working induction port, and a pedal displacement signal output port;
[0010] The pedal acquisition compatible wake-up variable circuit includes a wake-up source input variable resistor, a working power supply variable resistor, and a wake-up signal output variable diode. The pedal acquisition compatible wake-up variable circuit is used to acquire pedal displacement signals and compatibly identify pedal wake-up signals;
[0011] Among them, multiple groups of pedal displacement signals are set, and one or more groups of pedal wake-up signals are set. The pedal acquisition signal circuit and the pedal wake-up signal circuit are configured by combining the selection and pasting schemes of the wake-up source input variable resistor, the working power supply variable resistor, and the wake-up signal output variable diode.
[0012] In some embodiments, the power supply network port includes a VPWR port, the VPWR port is electrically connected to the power supply network, the power activation port includes a WAKE port, the WAKE port is electrically connected to the wake-up signal output port, the regulated power source output ports include a VCC1 port and a VCC2 port, and the VCC1 port and the VCC2 port are electrically connected to the working induction port.
[0013] In some embodiments, the wake-up source identification port includes an ADC1 port and an ADC2 port, the ADC1 port and the ADC2 port are electrically connected to the wake-up signal output port, the pedal displacement signal input port includes an IN1 port and an IN2 port, and the IN1 port and the IN2 port are electrically connected to the pedal displacement signal output port.
[0014] In some of these embodiments, the wake-up source input port includes a VSUP1 port and a VSUP2 port. The VSUP1 port is electrically connected to a VCC1 port and a power supply network. The VSUP2 port is electrically connected to a VCC2 port and a power supply network. The wake-up signal output port includes a WAU1 port and a WAU2 port. The WAU1 port is electrically connected to a WAKE port and an ADC1 port. The WAU2 port is electrically connected to a WAKE port and an ADC2 port. The working induction port includes a WKUP1 port and a WKUP2 port. The WKUP1 port is electrically connected to the VCC1 port. The WKUP2 port is electrically connected to the VCC2 port. The pedal displacement signal output port includes an OUT1 port and an OUT2 port. The OUT1 port is electrically connected to an IN1 port. The OUT2 port is electrically connected to an IN2 port.
[0015] In some of these embodiments, the wake-up source input variable resistors include a resistor R1, a resistor R2, a resistor R3, and a resistor R4. The VSUP1 port is electrically connected to the VCC1 port through the resistor R3, and the VSUP1 port is electrically connected to the power supply network through the resistor R4. The VSUP2 port is electrically connected to the VCC2 port through the resistor R1, and the VSUP2 port is electrically connected to the power supply network through the resistor R2.
[0016] In some of these embodiments, the working power supply variable resistors include a resistor R5 and a resistor R6. The WKUP1 port is electrically connected to the VCC1 port through the resistor R5, and the WKUP2 port is electrically connected to the VCC2 port through the resistor R6.
[0017] In some of these embodiments, the wake-up signal output variable diodes include a diode D2 and a diode D3. The WAU1 port is electrically connected to the WAKE port through the diode D2, and the WAU2 port is electrically connected to the WAKE port through the diode D3.
[0018] In a second aspect, the present invention also provides a pedal displacement sensor assembly, including:
[0019] A valve body, on one side of which a master cylinder is assembled, on one side of the master cylinder a pedal displacement sensor magnet assembly is assembled, and on the top of the valve body a pedal displacement sensor stator assembly is assembled.
[0020] In some of these embodiments, the master cylinder and the pedal are connected by a connecting rod. A piston ring is sleeved at the end of the master cylinder. The pedal displacement sensor magnet assembly is detachably connected to the master cylinder through the piston ring. Magnets are symmetrically arranged inside the pedal displacement sensor magnet assembly, and the axes of the magnets and the master cylinder are parallel to each other.
[0021] In some of these embodiments, the stator assembly of the pedal displacement sensor is vertically disposed on the top of the valve body, and a magnetic field induction chip is provided inside the stator assembly of the pedal displacement sensor.
[0022] The present invention has the following beneficial effects:
[0023] 1. In the present invention, by combining the wake-up source input variable resistor, the working power supply variable resistor, and the wake-up signal output variable diode selection and pasting scheme to configure the pedal acquisition signal circuit and the pedal wake-up signal circuit, it is possible to simultaneously collect normal multi-channel pedal displacement signals and be compatible with identifying multi-channel pedal wake-up signals, effectively improving the reliability of the pedal displacement sensor wake-up signal;
[0024] 2. In the present invention, the master cylinder and the pedal are connected by a connecting rod. Inside the magnet assembly of the pedal displacement sensor, magnetic steels are symmetrically arranged, and a magnetic field induction chip is provided inside the stator assembly of the pedal displacement sensor. It is only necessary to detect the forward or backward movement of the pedal to realize the identification of the pedal displacement wake-up signal, without the need to additionally increase a rotating pedal, effectively reducing the production cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is the electrical principle of the pedal displacement sensor circuit proposed by the present invention Figure 1 ;
[0026] Figure 2 is the electrical principle of the pedal displacement sensor circuit proposed by the present invention Figure 2 ;
[0027] Figure 3 is the structural schematic diagram of the pedal displacement sensor assembly proposed by the present invention;
[0028] Figure 4 is the schematic diagram of the magnetic steel arrangement test principle;
[0029] Figure 5 is the schematic diagram of the moving distance - magnetic field intensity when the magnetic field induction chip detects the movement of the magnetic steel.
[0030] Legend Explanation:
[0031] 1. Electronic control unit module; 11. Power supply module; 12. Microcontroller module; 2. Pedal displacement sensor module; 3. Pedal acquisition compatible wake-up variable circuit; 4. Valve body; 5. Master cylinder; 51. Piston ring; 6. Pedal displacement sensor magnet assembly; 7. Pedal displacement sensor stator assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0033] The embodiment of the present application provides a pedal displacement sensor circuit and an assembly. It solves the problems in the prior art that the traditional PTS circuit does not include a wake-up circuit and extremely relies on the mechanical rotation device of the pedal, resulting in a relatively high use cost and a relatively large overall volume. Another solution is that the wake-up circuit is independent of the PTS circuit, and it cannot ensure whether the wake-up source is real when the external is affected by magnetic field interference (there is a risk of single-point failure and it cannot meet the system functional safety requirements), making the product reliability relatively low. And the present application configures the pedal acquisition signal circuit and the pedal wake-up signal circuit by combining the wake-up source input variable resistor, the working power supply variable resistor, and the wake-up signal output variable diode selection and pasting scheme, realizing the compatibility of identifying multiple pedal wake-up signals while collecting normal multiple-channel pedal displacement signals, effectively improving the reliability of the pedal displacement sensor wake-up signal. It only needs to detect the forward or backward movement of the pedal to realize the identification of the pedal displacement wake-up signal, without adding an additional rotating pedal, effectively reducing the production cost of the product.
[0034] Please refer to the following embodiments specifically:
[0035] Refer to Figure 1 - Figure 2 , an embodiment of a pedal displacement sensor circuit provided by the present invention, the specific structure includes: an Electronic Control Unit (ECU) module, a Pedal Travel Sensor (PTS) module, and a pedal acquisition compatible wake-up variable circuit 3. The electronic control unit module 1 and the displacement sensor module are electrically connected through the pedal acquisition compatible wake-up variable circuit 3;
[0036] Among them, multiple groups of pedal displacement signals are set, and one group or multiple groups of pedal wake-up signals are set. By configuring the pedal acquisition signal circuit through the selection and pasting scheme of resistors and diodes, and selecting not to activate or activate one group / multiple groups of pedal wake-up signal circuits, while collecting normal multiple-channel pedal displacement signals, multiple-channel pedal wake-up signals can be compatibly identified according to the usage scenario and usage requirements.
[0037] Please continue to refer to Figure 1 - Figure 2, in this embodiment, the electronic control unit module 1 includes a power supply module 11 and a microcontroller unit (MCU) module. Among them, the power supply module 11 is provided with a power supply network port, a power activation port, and a regulated power source output port, while the microcontroller module 12 is provided with a wake-up source identification port and a pedal displacement signal input port.
[0038] Exemplarily, the power supply network port includes a VPWR port, and the VPWR port is electrically connected to the power supply network ( Figure 1 which is the HBL power supply herein) to supply power to the power supply module 11;
[0039] The power activation port includes a WAKE port, and the WAKE port is electrically connected to the wake-up signal output port, and can activate the power supply module 11 when the pedal displacement sensor is awakened from the sleep state;
[0040] The regulated power source output port includes a VCC1 port and a VCC2 port, and the VCC1 port and the VCC2 port are electrically connected to the working sensing port, and supply power to the pedal displacement sensor as a regulated power source when the displacement sensor wake-up function is not used;
[0041] The wake-up source identification port includes an ADC1 port and an ADC2 port, and the ADC1 port and the ADC2 port are electrically connected to the wake-up signal output port for identifying the wake-up source;
[0042] The pedal displacement signal input port includes an IN1 port and an IN2 port, and the IN1 port and the IN2 port are electrically connected to the pedal displacement signal output port for receiving the configured displacement signal.
[0043] Please continue to refer to Figure 1 - Figure 2 , in this embodiment, the pedal displacement sensor module 2 is provided with a wake-up source input port, a wake-up signal output port, a working sensing port, and a pedal displacement signal output port.
[0044] Exemplarily, the wake-up source input port includes a VSUP1 port and a VSUP2 port. The VSUP1 port is electrically connected to the VCC1 port and the power supply network ( Figure 1 which is the HBL power supply herein), and the VSUP2 port is electrically connected to the VCC2 port and the power supply network for receiving the wake-up source signal;
[0045] The wake-up signal output port includes a WAU1 port and a WAU2 port. The WAU1 port is electrically connected to the WAKE port and the ADC1 port, and the WAU2 port is electrically connected to the WAKE port and the ADC2 port, and is used to output two redundant WAKE1 and WAKE2 wake-up levels to the WAKE port of the power supply module 11 to activate the power supply module 11;
[0046] The working induction ports include the WKUP1 port and the WKUP2 port. The WKUP1 port is electrically connected to the VCC1 port, and the WKUP2 port is electrically connected to the VCC2 port, so that after the power module 11 is awakened and activated, the pedal displacement sensor can be powered by the power module 11.
[0047] Correspondingly, the pedal displacement signal output ports include the OUT1 port and the OUT2 port. The OUT1 port is electrically connected to the IN1 port, and the OUT2 port is electrically connected to the IN2 port, for outputting the configured displacement signal.
[0048] Please continue to refer to Figure 1 - Figure 2 , in this embodiment, the pedal acquisition compatible wake-up variable circuit 3 includes a wake-up source input variable resistor, a working power supply variable resistor, and a wake-up signal output variable diode, for acquiring the pedal displacement signal and compatibly identifying the pedal wake-up signal.
[0049] Exemplarily, the wake-up source input variable resistors include resistor R1, resistor R2, resistor R3, and resistor R4. The VSUP1 port is electrically connected to the VCC1 port through resistor R3, the VSUP1 port is electrically connected to the power supply network through resistor R4, the VSUP2 port is electrically connected to the VCC2 port through resistor R1, and the VSUP2 port is electrically connected to the power supply network through resistor R2;
[0050] Correspondingly, the working power supply variable resistors include resistor R5 and resistor R6. The WKUP1 port is electrically connected to the VCC1 port through resistor R5, and the WKUP2 port is electrically connected to the VCC2 port through resistor R6. The wake-up signal output variable diodes include diode D2 and diode D3. The WAU1 port is electrically connected to the WAKE port through diode D2, and the WAU2 port is electrically connected to the WAKE port through diode D3.
[0051] It can be understood that when selecting and pasting resistors and diodes, according to the usage scenario and requirements, by combining the selection and pasting schemes of pairwise wake-up source input variable resistors with the corresponding working power supply variable resistors and wake-up signal output variable diodes, the pedal acquisition signal circuit and the pedal wake-up signal circuit can be configured to realize the acquisition of normal multi-channel pedal displacement signals while compatibly identifying multi-channel pedal wake-up signals, effectively improving the reliability of the pedal displacement sensor wake-up signal.
[0052] Operating principle:
[0053] The VBL power supply serves as the power supply network for the VPWR port of the ECU and the VSUP port of the PTS. Correspondingly, on the vehicle, it is the power supply network after the positive pole of the battery ( Figure 1 is KL30 in , that is, the Vbat power supply) passes through the anti-reverse diode D1;
[0054] When the PTS wake-up function is used, the VBL power supply provides a pedal wake-up voltage source for the VSUP port of the PTS module; when the PTS wake-up function is not used, the power supply module 11 supplies power to the VSUP port of the PTS module from the VCC1 port and the VCC2 port;
[0055] After the PTS pedal wake-up function is activated, the PTS module can output one or two redundant wake-up level signals (WAKE1 signal and / or WAKE2 signal) through the WAU1 port and / or the WAU2 port to the WAKE port of the power supply module 11 to wake up and activate the power supply module 11. After the power supply module 11 is woken up and activated, it serves as a voltage stabilizer source and supplies power to the corresponding WKUP1 port and WKUP2 port of the independent magnetic field induction chip inside the PTS module through the VCC1 port and the VCC2 port respectively; at the same time, the ADC acquisition module inside the MCU module acquires the wake-up level signals (WAKE1 signal and / or WAKE2 signal) through the ADC1 port and / or the ADC2 port to judge the specific wake-up source;
[0056] After the WKUP port of the PTS module is powered, the PTS module will switch from the sleep mode to the normal mode, and output two redundant pedal displacement signal identification signals to the MCU module in the ECU module through the OUT1 port and / or the OUT2 port. The signal type is compatible with the Single Edge Nibble Transmission (SENT) signal and the Pulse Width Modulation (PWM) signal, and then the pedal displacement signal of the PTS module is identified;
[0057] (1) Resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, diode D2 and diode D3 are connected to form the pedal acquisition compatible wake-up variable circuit 3. By combining and selectively soldering the above variables, it is possible to configure whether to use the PTS wake-up function and how many pedal wake-up signals to use, so as to realize the functions of compatible pedal wake-up and normal pedal displacement signal acquisition; when the vehicle is in the sleep state, after stepping on the pedal, the pedal drives the pedal connecting rod to move forward and backward, and then drives the permanent magnet in the detection component to move forward and backward, causing the magnetic field strength to change:
[0058] (1)Exemplarily, when resistors R2, R4, R5, R6, diodes D2 and D3 remain surface-mounted while resistors R1 and R3 do not, the VSUP1 and VSUP2 ports of the PTS module are powered by the VBL power supply as the wake-up source. During the further advancement of the magnetic steel, when the magnetic field intensity on the Z-axis reaches the magnetic field intensity at the PTS wake-up moment, the PTS module is awakened from the sleep state. The WAU1 and WAU2 ports will output the WAKE1 and WAKE2 wake-up signals at a high level for CrossCheck (cross-check, using two independent wake-up signal sources for cross-check can avoid false wake-up of the system caused by single-signal interference or errors, thereby improving reliability and accuracy), and then input them to the power supply module 11 for wake-up, and input them to the ADC1 and ADC2 ports of the MCU module for identification of the wake-up source; the specific steps include: signal synchronization, the two signals WAKE1 and WAKE2 need to be at a high level simultaneously to ensure their synchronization in time; cross-verification, the system checks the states of the two signals, and only when both are at a high level will the wake-up process be triggered; wake-up power supply, after the verification passes, the power supply module 11 is awakened to enter the normal working state; wake-up source identification, after wake-up, the MCU module reads the signals through the ADC1 and ADC2 ports to identify the specific wake-up source.
[0059] (2)When the power supply module 11 of the ECU module is activated and supplies power as a voltage regulator from the VCC1 and VCC2 ports, the VCC1 port supplies power to the WKUP1 port and / or the WKUP2 port of the PTS module. The PTS module will switch from the sleep mode to the normal working mode. Subsequently, the internal magnetic field induction chip of the PTS module, based on the Hall effect, calculates the magnetic field direction and magnetic field intensity at the detection point internally, and converts them into corresponding magnetic field angle electrical signals. Then, two independent pedal displacement signals sensed are output in the form of Single Edge Nibble Transmission (SENT) signals or Pulse Width Modulation (PWM) signals for CrossCheck, and then enter the ECU module for identification;
[0060] (2) The acquisition logic for compatible pedal wake-up and pedal signals is as follows:
[0061] (1) When the PTS module needs to normally output two pedal displacement signals and be compatible with two independent and redundant pedal wake-up signals (applied to braking products, some high-level intelligent driving applications require the PTS module wake-up function, and at this time, two independent PTS module wake-up signals need to be output), the VSUP1 port and VSUP2 port of the PTS module need to be powered by the VBL power supply, the WKUP1 port needs to be powered by the VCC1 port, and the WKUP2 port needs to be powered by the VCC2 port. At this time, the resistors R2, R4, R5, R6, diodes D2 and D3 need to retain the SMT, while the resistors R1 and R3 do not need to retain the SMT;
[0062] (2) When the PTS module needs to normally output two pedal displacement signals and be compatible with one pedal wake-up signal (applied to the e-Peda electronic pedal product, enabling the driver to complete operations such as vehicle start, acceleration, deceleration, and braking by only operating the accelerator pedal. Therefore, only one PTS output signal is required, and the pedal wake-up function is not essential), taking the WAU1 port as an example, at this time, the VSUP1 port of the PTS module needs to be powered by the VBL power supply, the WKUP1 port needs to be powered by the VCC1 port, while the VSUP2 port is powered by the VCC2 port (does not require the VBL power supply), and the WKUP2 port does not require the VCC2 port for power supply. At this time, the resistors R1, R4, R5 and diode D2 need to retain the SMT, and the resistors R2, R6 and diode D3 do not need to retain the SMT;
[0063] (3) When the PTS module only needs to normally output two pedal displacement signals and does not require a pedal wake-up signal, at this time, the VSUP1 port of the PTS module is powered by the VCC1 port, and the VSUP2 port is powered by the VCC2 port. The WKUP1 port does not require the VCC1 port for power supply (does not need to output the WAKE1 signal), and the WKUP2 port does not require the VCC2 port for power supply (does not need to output the WAKE2 signal). At this time, the resistors R1, R3 need to retain the SMT, and the resistors R2, R4, R5, R6 and diodes D2, D3 do not require SMT;
[0064] (4) When it is necessary to output the pedal displacement signals of the SENT or PWM type from the OUT1 port and / or OUT2 port to the MCU module, when selecting and pasting resistors and diodes, according to the usage scenario and requirements, by combining the selection and pasting schemes of the wake-up source input variable resistors (resistors R1 / R2 / R3 / R4) in pairs with the corresponding working power supply variable resistors (resistors R5 / R6) and the wake-up signal output variable diodes (diodes D2 / D3), the pedal acquisition signal circuit and the pedal wake-up signal circuit can be configured, and up to two-way pedal wake-up signals can be transmitted to the ECU module, realizing the compatibility of the output of two independent pedal wake-up signals on the basis of normally acquiring and outputting two-way pedal displacement signals;
[0065] Referring to Figure 3 - Figure 5 , the present invention also provides an embodiment of a pedal displacement sensor assembly, including: a valve body 4, a master cylinder 5 is assembled on one side of the valve body 4, a pedal displacement sensor magnet assembly 6 is assembled on one side of the master cylinder 5, and a pedal displacement sensor stator assembly 7 is assembled on the top of the valve body 4.
[0066] Among them, the master cylinder 5 and the pedal are connected by a connecting rod, a piston ring 51 is sleeved at the end of the master cylinder 5, the pedal displacement sensor magnet assembly 6 is detachably connected to the master cylinder 5 through the piston ring 51, magnetic steels are symmetrically arranged inside the pedal displacement sensor magnet assembly 6, and the axes of the magnetic steels and the master cylinder 5 are parallel to each other; the pedal displacement sensor stator assembly 7 is vertically arranged on the top of the valve body 4, and a magnetic field induction chip is arranged inside the pedal displacement sensor stator assembly 7.
[0067] Working principle:
[0068] When the driver steps on the pedal, pressure will be applied to the pedal, the pedal drives the pedal connecting rod to move forward and backward, and then drives the magnetic steel in the detection component to move back and forth, causing the magnetic field strength to change:
[0069] The N poles and S poles of the symmetrically arranged magnetic steels form an induction magnetic field. When the pedal drives the magnetic steel to move forward together, the internal magnetic field induction chip (including a three-axis Hall induction unit) of the PTS module respectively detects the magnetic field components in three directions of the magnetic field at the same point based on the Hall effect. When the magnetic steel moves a certain distance from the chip, the magnetic field direction and magnetic field strength of the detection point are calculated through the internal operation of the chip, and are converted into corresponding magnetic field angle electrical signals and two independent pedal displacement signals are output, which are output in the form of Single Edge Nibble Transmission (SENT) signals or Pulse Width Modulation (PWM) signals, facilitating CrossCheck between the two-way pedal displacement signals; when the magnetic field strength of the Z axis reaches the magnetic field strength at the PTS wake-up moment ( Figure 5At the position indicated by the arrow in the figure), the PTS module is awakened from the sleep state, outputs two independent wake-up signals, and transmits the wake-up signals to the ECU module, realizing the acquisition of normal pedal displacement signals and being compatible with the output of two-way pedal wake-up signals.
[0070] Through the above technical solutions, in terms of circuit design, the present application configures the pedal acquisition signal circuit and the pedal wake-up signal circuit by combining the wake-up source input variable resistor, the working power supply variable resistor, and the wake-up signal output variable diode selection and pasting scheme, realizing the acquisition of normal multi-channel pedal displacement signals while being compatible with the identification of multi-channel pedal wake-up signals, effectively improving the anti-interference ability and reliability of the pedal displacement sensor wake-up signal; in terms of mechanical structure design, the master cylinder 5 and the pedal are connected by a connecting rod, the pedal displacement sensor magnet assembly 6 is symmetrically provided with magnetic steel inside, and the pedal displacement sensor stator assembly 7 is provided with a magnetic field induction chip inside. Only by detecting the forward or backward movement of the pedal can the identification of the pedal displacement wake-up signal be realized, without the need to additionally increase a rotating pedal, simplifying the mechanical structure design, reducing the system assembly complexity and production cost, and improving the maintainability and manufacturability of the product.
[0071] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A pedal displacement sensor circuit, characterized in that: include: An electronic control unit module (1), a pedal displacement sensor module (2) and a pedal acquisition compatible wake-up variable circuit (3), wherein the electronic control unit module (1) and the displacement sensor module are electrically connected via the pedal acquisition compatible wake-up variable circuit (3); The electronic control unit module (1) comprises a power supply module (11) and a microcontroller module (12); the power supply module (11) is provided with a power supply network port, a power activation port and a voltage stabilization source output port; the microcontroller module (12) is provided with a wake-up source identification port and a pedal displacement signal input port; The pedal displacement sensor module (2) is provided with a wake-up source input port, a wake-up signal output port, a working sensing port and a pedal displacement signal output port; The pedal acquisition compatible wake-up variable circuit (3) comprises a wake-up source input variable resistor, a working power supply variable resistor and a wake-up signal output variable diode, and the pedal acquisition compatible wake-up variable circuit (3) is used to acquire a pedal displacement signal and a compatible identification pedal wake-up signal; Among them, multiple groups of pedal displacement signals are set, and one or more groups of pedal wake-up signals are set. The pedal signal collection circuit and the pedal wake-up signal circuit are configured by combining the wake-up source input variable resistor, the working power supply variable resistor, and the wake-up signal output variable diode selection scheme.
2. The pedal displacement sensor circuit according to claim 1, characterized in that: The power supply network port includes a VPWR port, which is electrically connected to the power supply network; the power activation port includes a WAKE port, which is electrically connected to the wake-up signal output port; the voltage stabilization source output port includes a VCC1 port and a VCC2 port, which are electrically connected to the working sensing port.
3. The pedal displacement sensor circuit according to claim 1, characterized in that: The wake-up source identification port includes an ADC1 port and an ADC2 port, and the ADC1 port and the ADC2 port are electrically connected to the wake-up signal output port. The pedal displacement signal input port includes an IN1 port and an IN2 port, and the IN1 port and the IN2 port are electrically connected to the pedal displacement signal output port.
4. The pedal displacement sensor circuit according to claim 1, characterized in that: The wake-up source input port includes a VSUP1 port and a VSUP2 port, the VSUP1 port is electrically connected to the VCC1 port and the power supply network, the VSUP2 port is electrically connected to the VCC2 port and the power supply network, the wake-up signal output port includes a WAU1 port and a WAU2 port, the WAU1 port is electrically connected to the WAKE port and the ADC1 port, the WAU2 port is electrically connected to the WAKE port and the ADC2 port, the working sensing port includes a WKUP1 port and a WKUP2 port, the WKUP1 port is electrically connected to the VCC1 port, the WKUP2 port is electrically connected to the VCC2 port, the pedal displacement signal output port includes an OUT1 port and an OUT2 port, the OUT1 port is electrically connected to the IN1 port, and the OUT2 port is electrically connected to the IN2 port.
5. The pedal displacement sensor circuit according to claim 1, characterized in that: The wake-up source input variable resistor includes resistor R1, resistor R2, resistor R3 and resistor R4, the VSUP1 port is electrically connected to the VCC1 port through the resistor R3, the VSUP1 port is electrically connected to the power supply network through the resistor R4, the VSUP2 port is electrically connected to the VCC2 port through the resistor R1, and the VSUP2 port is electrically connected to the power supply network through the resistor R2.
6. The pedal displacement sensor circuit according to claim 1, characterized in that: The working power supply variable resistor includes a resistor R5 and a resistor R6, the WKUP1 port is electrically connected to the VCC1 port through the resistor R5, and the WKUP2 port is electrically connected to the VCC2 port through the resistor R6.
7. The pedal displacement sensor circuit according to claim 1, characterized in that: The wake-up signal output variable diode includes a diode D2 and a diode D3, the WAU1 port is electrically connected to the WAKE port through the diode D2, and the WAU2 port is electrically connected to the WAKE port through the diode D3.
8. A pedal displacement sensor assembly, characterized in that: include: A valve body (4), one side of the valve body (4) is equipped with a master cylinder (5), one side of the master cylinder (5) is equipped with a pedal displacement sensor magnet assembly (6), and the top of the valve body (4) is equipped with a pedal displacement sensor stator assembly (7).
9. The pedal displacement sensor assembly according to claim 8, characterized in that: The master cylinder (5) and the pedal are connected via a connecting rod, a piston ring (51) is sleeved on the end of the master cylinder (5), the pedal displacement sensor magnet assembly (6) is detachably connected to the master cylinder (5) via the piston ring (51), magnetic steel is symmetrically arranged inside the pedal displacement sensor magnet assembly (6), and the axes of the magnetic steel and the master cylinder (5) are parallel to each other.
10. The pedal displacement sensor assembly according to claim 8, characterized in that: The pedal displacement sensor stator assembly (7) is vertically arranged on the top of the valve body (4), and a magnetic field sensing chip is arranged inside the pedal displacement sensor stator assembly (7).