Electronic control system with braking signal output function

Abstract

The present invention discloses a braking signal output control system, which includes a sensing unit and a signal processing and output unit. The sensing unit is connected to the signal processing and output unit. The sensing unit is used to detect the displacement or pressure signal of the master cylinder, and the signal processing and output unit outputs a braking signal according to the received displacement or pressure signal of the master cylinder. The advantages of the present invention are as follows: the output of the braking signal is controlled by the change of the displacement or pressure of the master cylinder, with high braking signal control accuracy, fast response speed, good product consistency, and being safe and reliable; the traditional brake pedal switch and its wiring harness are cancelled, improving the working reliability and safety of the braking system, and having a low material cost; the system has redundant settings, and the microcontroller performs redundant functions such as verification, monitoring, protection, and alarm output; the microcontroller can be in a sleep state and be activated by the wake-up source signal to participate in work.

Description

Technical Field

[0001] The present invention relates to the field of automotive braking, and particularly to an electronic control system with a braking signal output function. Background Art

[0002] In the prior art, the output of automotive braking signals is achieved by using a braking switch. When the traditional braking pedal switch is installed and arranged, the consistency control of the assembly gap between the pedal switch and the pedal is poor, resulting in the signal triggering of the pedal switch being advanced or delayed, so the safety is relatively low; the traditional braking pedal switch adopts a mechanical contact structure, which is prone to poor contact of the contacts, has low working reliability, high failure rate, and frequent recall events; the wiring harness of the traditional braking pedal switch is prone to wear, resulting in open circuit and short circuit faults, and the fault detection rate is low; moreover, the traditional braking pedal switch has a certain material cost.

[0003] With the gradual development of automotive electronic control systems, an electronic control system with a braking signal output function can completely replace the traditional braking pedal switch, which will be a future development trend. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an electronic control system with a braking signal output function, which outputs a braking signal by collecting the displacement or pressure signal of the master cylinder.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: an electronic control system with a braking signal output function, including a sensing unit and a signal processing and output unit, the sensing unit is connected to the signal processing and output unit, the sensing unit is used to detect the displacement or pressure signal of the master cylinder, and the signal processing and output unit outputs a braking signal according to the received displacement or pressure signal of the master cylinder.

[0006] The data processing and output unit pre-sets a braking signal opening threshold and a braking signal closing threshold. When the displacement or pressure of the master cylinder detected by the sensing unit changes from 0 to reach the braking signal opening threshold, a braking signal opening signal is output; when the displacement or pressure of the master cylinder detected by the sensing unit gradually decreases to the braking signal closing threshold, a braking signal cut-off signal is output.

[0007] The control system further includes a power management unit, an external power supply is input to the power management unit, and the power management unit is respectively connected to the signal processing and output unit and the sensing unit.

[0008] The electronic control signal further includes a microcontroller, and the microcontroller respectively collects the level signals of the two output terminals of the sensing unit through a collection circuit. When the level signals are inconsistent, the microcontroller issues an alarm signal.

[0009] One output terminal of the described sensing unit is connected to the signal processing and output unit to achieve the output of the braking signal. Both output terminals of the sensing unit are connected to the microcontroller unit to enable the microcontroller to monitor and verify the two-way output signals of the sensor. When the microcontroller finds that the two-way output signals of the sensing unit are inconsistent, the microcontroller issues a fault signal.

[0010] The microcontroller is connected to the fault display module. When the microcontroller finds that the two-way output signals of the sensing unit are inconsistent, the microcontroller issues a fault signal and requests the fault display module to work.

[0011] The microprocessor outputs a control signal to the power management unit to control the power management unit to stop supplying power to the sensing unit and / or the signal processing and output unit when a fault occurs in the output of the sensing unit. After receiving the stop work instruction from the microcontroller, the signal processing and output unit stops working.

[0012] The microcontroller has a wake-up function. The signal processing and output unit sends a wake-up signal to the microcontroller through the power management unit to provide a wake-up source to activate the microcontroller to work.

[0013] The signal processing and output unit is electrically connected to external devices through a connector; an external power supply device is electrically connected to the power management unit through a connector.

[0014] The signal processing and output unit detects the working current data through a working current detection module. When the current is greater than the set working current, the signal processing and output unit sends a control signal to the power management unit to control the power management unit to stop supplying power to the signal processing and output unit.

[0015] The power management unit has overvoltage, overcurrent, undervoltage, and overtemperature protection.

[0016] The advantages of the present invention are as follows: The output of the braking signal is controlled by the change of the master cylinder displacement or pressure, with high braking signal control accuracy, fast response speed, good product consistency, and being safe and reliable; the traditional brake pedal switch and its wiring harness are cancelled, improving the working reliability and safety of the braking system and having a low material cost; the system has redundant settings, and the microcontroller is set to perform redundant functions such as verification, monitoring, protection, and alarm output; the microcontroller can be in a sleep state and be activated to participate in work through the wake-up source signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following briefly describes the content expressed in each drawing of the present invention specification and the marks in the drawings:

[0018] Figure 1It is the structural schematic diagram of the braking signal output control system of the present invention;

[0019] Figure 2 It is the schematic diagram of the relationship between the braking signal output and the acquisition signal of the present invention.

[0020] The marks in the above figures are all: 1. Connector; 2. Power management unit; 3. Sensing unit; 4. Signal processing and output unit; 5. Microcontroller. Detailed implementation manners

[0021] Next, with reference to the accompanying drawings, through the description of the optimal embodiments, the specific implementation manners of the present invention will be further described in detail.

[0022] An electronic control system with a braking signal output function includes a sensing unit and a signal processing and output unit, which outputs a braking signal by detecting the master cylinder displacement or pressure change generated by the displacement of the brake pedal. The sensing unit is connected to the signal processing and output unit. The sensing unit is used to detect the master cylinder displacement or pressure signal, and the signal processing and output unit outputs a braking signal according to the received master cylinder displacement or pressure signal.

[0023] The data processing and output unit pre-sets a braking signal opening threshold and a braking signal closing threshold. When the master cylinder displacement or pressure detected by the sensing unit changes from 0 to reach the braking signal opening threshold, a braking signal opening signal is output; when the master cylinder displacement or pressure detected by the sensing unit gradually decreases to the braking signal closing threshold, a braking signal cut-off signal is output.

[0024] As Figure 2 shown, taking the process of the master cylinder displacement or pressure signal changing from 0 to P and then from P to 0 as an example, with P2 as the braking signal opening threshold and P1 as the braking signal closing threshold; using the master cylinder displacement or pressure change generated by the pedal displacement and converting it into a braking on / off limit signal for output. When the sensing unit detects that the master cylinder displacement or pressure changes from 0 to P and reaches P2, a braking signal on (ON) signal is output. When the sensing unit detects that the master cylinder displacement or pressure changes from P to 0 and reaches P1, a braking signal off (OFF) signal is output.

[0025] The power management unit is used for power supply management of the entire system. The external power supply is input to the power management unit, which is respectively connected to the signal processing and output unit and the sensing unit, and is used to supply power to the signal processing and output unit and the sensing unit respectively. The external power supply device is electrically connected to the power management unit through a connector. The device inside the external power supply supplies power to the power management unit through the connector, and the power management unit outputs power to the sensing unit. When the displacement or pressure of the master brake cylinder changes, the sensing unit converts it into an electrical signal. After being processed by the signal processing and output unit, the brake signal is output through the connector. The magnitude of the brake signal can calibrate the relationship between the acquisition signal of the sensing unit and the output brake signal according to actual experiments, and finally output correspondingly according to the calibrated corresponding relationship when starting.

[0026] In addition, the signal processing and output unit also has a control output function for the power management unit. The microprocessor outputs a control signal to the power management unit, which is used to control the power management unit to stop supplying power to the sensing unit and / or the signal processing and output unit when a fault occurs in the output of the sensing unit.

[0027] The power management unit supplies power to the microcontroller, and the microcontroller can be used as a redundant design for verifying the output signal of the sensing unit. The implementation principle of the system function is simple and the operation is reliable. The brake signal output function can be realized by using the minimum system of the electronic control system. The minimum system of the electronic control system includes a connector, a power management unit, a sensing unit, and a signal processing and output unit. Therefore, in general, by using the minimum system of the electronic control system, the system can realize the brake signal output function without the participation of the microcontroller.

[0028] Redundant design is carried out on the system function. In general, the microcontroller does not need to participate in the operation. When the microcontroller participates in the operation, it can verify the output signal of the sensing unit, so that the system has redundant functions such as verification, monitoring, protection, and alarm output, improving the reliability and safety of the system.

[0029] The redundant design includes that the two output terminals of the sensing unit respectively collect their output level signals through the acquisition unit, and the level signals of the two output terminals are sent into the microcontroller. The microcontroller compares whether the level signals of the two output terminals are consistent. When the level signals of the two output terminals are inconsistent, the microcontroller issues an alarm signal. Thus, redundant functions such as verification, monitoring, protection, and alarm output of the output signal of the sensing unit are realized. One output terminal of the sensing unit is connected to the signal processing and output unit to realize the output of the brake signal. Both output terminals of the sensing unit are connected to the microcontroller unit to realize the monitoring and verification of the two-way output signals of the sensor by the microcontroller. When the microcontroller finds that the two-way output signals of the sensing unit are inconsistent, the microcontroller issues a fault signal.

[0030] The monitoring and alarming of the microcontroller include: The microcontroller is connected to the fault display module, and an alarm signal is given through the alarm; or the microcontroller is connected to the host computer, and the alarm signal is uploaded to the host computer for alarm data uploading and alarm display.

[0031] The system has a wake-up function. When the microcontroller is in a sleep state, the signal processing and output unit can provide a wake-up source to the power management unit to activate the microcontroller to participate in work. Therefore, the system has the characteristic of a wake-up function. The microcontroller has a wake-up function. The signal processing and output unit sends a wake-up signal to the microcontroller through the power management unit to provide a wake-up source to activate the microcontroller to work.

[0032] The installation and layout of the sensing unit are flexible. It can be integrated inside the electronic control system and integrated with other components, or it can be separated from the electronic control system controller and exist on an independent board. The two are electrically connected through a connector.

[0033] The signal processing and output unit has an overcurrent safety protection design. The signal processing and output unit has a control output to the power management unit. At the same time, the power management unit itself also has safety protection designs such as overvoltage, overcurrent, undervoltage, and overtemperature.

[0034] The signal processing and output unit detects the working current data through the working current detection module. When the current is greater than the set working current, the signal processing and output unit sends a control signal to the power management unit to control the power management unit to stop supplying power to the signal processing and output unit, or the signal processing and output unit stops working through software power-off protection. The power management unit has overvoltage, overcurrent, undervoltage, and overtemperature protection functions. Through the data detected by the voltage detection module, current detection module, and temperature detection module for analysis and comparison, when overvoltage, overcurrent, undervoltage, overtemperature and other states occur, it automatically stops working, and the power management unit chip automatically cuts off the power and stops working.

[0035] The advantages of this system are as follows: The trigger position point of the brake pedal is completely adjusted by the system circuit; The brake signal control has high precision, fast response speed, good product consistency, is safe and reliable. At the same time, the system has safety protection designs such as overvoltage, undervoltage, overcurrent, and overtemperature; The traditional brake pedal switch and its wiring harness on the vehicle are cancelled, improving the working reliability and safety of the braking system and reducing the material cost; Under normal circumstances, the microcontroller in the system does not need to participate in work. When the microcontroller participates in work, the system has redundant functions such as verification, monitoring, protection, and alarm output, thereby improving the reliability and safety of the system; In special cases, when the microcontroller is in a sleep state, the brake signal is used as a wake-up source to activate the microcontroller to participate in work. Therefore, the system has the characteristic of a wake-up function.

[0036] Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. An electronic control system with a braking signal output function, characterized in that: It includes a sensing unit, a signal processing and output unit. The sensing unit is connected to the signal processing and output unit. The sensing unit is used to detect the displacement or pressure signal of the master cylinder. The signal processing and output unit outputs a braking signal according to the received displacement or pressure signal of the master cylinder; The signal processing and output unit pre-sets a braking signal opening threshold and a braking signal closing threshold. When the displacement or pressure of the master cylinder detected by the sensing unit changes from 0 and reaches the braking signal opening threshold, a braking signal opening signal is output; when the displacement or pressure of the master cylinder detected by the sensing unit gradually decreases to the braking signal closing threshold, a braking signal cut-off signal is output; The signal processing and output unit detects the working current data through a working current detection module. When the current is greater than the set working current, the signal processing and output unit sends a control signal to the power management unit to control the power management unit to stop supplying power to the signal processing and output unit; the power management unit has overvoltage, overcurrent, undervoltage, and overtemperature protection functions. Through the data detected by the voltage detection module, current detection module, and temperature detection module for analysis and comparison, when overvoltage, overcurrent, undervoltage, and overtemperature states occur, it automatically stops working, and the power management unit chip automatically cuts off the power and stops working; the electronic control system also includes a power management unit. The external power supply is input to the power management unit, and the power management unit is respectively connected to the signal processing and output unit and the sensing unit; the electronic control system also includes a microcontroller. The microcontroller respectively collects the level signals at the two output ends of the sensing unit through a collection circuit. When the level signals are inconsistent, the microcontroller issues an alarm signal; the microcontroller is connected to a fault display module. When a fault occurs in the output data, the microcontroller issues a fault signal to request the fault display module to work; The microcontroller outputs a control signal to the power management unit to control the power management unit to stop supplying power to the sensing unit and / or the signal processing and output unit when a fault occurs in the output of the sensing unit; The microcontroller has a wake-up function. The signal processing and output unit sends a wake-up signal to the microcontroller through the power management unit to provide a wake-up source to activate the microcontroller to work.

2. An electronic control system with a braking signal output function according to claim 1, characterized in that: The signal processing and output unit is electrically connected to external devices through a connector; the external power supply device is electrically connected to the power management unit through a connector.

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