CN103883194A

CN103883194A - Automatic car window anti-pinch device based on FPGA

Info

Publication number: CN103883194A
Application number: CN201410087453.2A
Authority: CN
Inventors: 赵剑毅; 梁柱; 卢毅
Original assignee: 赵剑毅
Priority date: 2014-03-11
Filing date: 2014-03-11
Publication date: 2014-06-25

Abstract

The invention discloses an automatic car window anti-pinch device based on an FPGA. An FPGA processor which is small in size, low in power consumption and cost, high in performance, flexible and simple in addressing mode and high in execution efficiency is introduced into an saloon car window anti-pinch system, the FPGA processor is taken as a control center of the anti-pinch system, coordinating work among an optoelectronic isolation chip, a sensor, a power module, a memorizer, a driver and a motor is controlled by the control center, and a common embedded controller is replaced by the field programmable gata array (FPGA), so that the problem that when pinching an obstacle, an saloon car window can not be braked and descend, and meanwhile the problem the saloon car window anti-pinch system is large in shake and noise in the ascending and descending process is solved; the automatic car window anti-pinch device has the advantages of being simple in structure, safe and reliable.

Description

The automatic anti-jamming device of vehicle window based on FPGA

Technical field

The present invention relates to vehicle glazing control system, especially anti-pinching car window device.

Background technology

Today of auto industry fast development, the raising that the use of electronic control system is automotive performance is laid a good foundation, and the lifting of automobile window glass is developed into the electronic control of today from the crank handle operation in past.At present, about the matching way of pinch resistant functionality parameter, according to principle difference, can be divided into two kinds: a kind of is based on Hall element, mainly by hand dipping distance, another kind is based on current detecting, is mainly to be gathered electric current or taked distinct program to realize the collection to electric current according to particular hardware by hand dipping.The realization of electronic control has alleviated driver and crew's labour intensity greatly, also for the safety of driving process provides guarantee, but existing electronic control lifting window is jammed because there is obstruction suddenly in lifting process sometimes, particularly driver and crew's hand, first-class, has brought hidden danger to driver and crew's safety.In order to solve problem above, have now technician that embedded system is introduced in vehicle window clipping prevention system, but the work of embedded system is not very stable yet, noise is also larger.

Some open source literatures about vehicle window clipping prevention system as follows:

1, [title] Intelligent vehicle window anti-clamping device, [application number] CN201020178548.2[publication number] patent documentation of CN201695848U discloses a kind of Intelligent vehicle window anti-clamping device, in this device vehicle window, microcontroller is housed, described microcontroller, the first relay, the second relay and power supply are linked to be a circuit by wire; The 1st, 3 pin of described the first relay J 1, the 1st, 3 pin of the second relay J 2 are connected with the positive pole of power supply respectively; The 4th pin of described the first relay J 1, the 4th pin of the second relay J 2 are connected with the motor M bipod of each vehicle window respectively; The 5th pin of described the first relay J 1 and the 1st pin of microcontroller are connected, and the 5th pin of the second relay J 2 and the 3rd pin of microcontroller are connected; The 2nd pin of described the first relay J 1 and the 2nd pin of the second relay J 2 meet at A point, are then connected with the 2nd pin of microcontroller; The negative pole of described power supply is connected with A point by wire.

2, [title] a kind of power window clamp prevention sensor, [patent No.] CN201220023284.2, the patent documentation of [publication number] CN202417144U discloses a kind of power window clamp prevention sensor, it is included on glass for vehicle window, along surface, at least two electric capacity and sensor detection circuit is set, the electric capacity that is wherein positioned at topmost forms main Detection capacitance C1, the electric capacity that is positioned at bottom forms auxiliary detection capacitor C 2, whether described main Detection capacitance C1 and described auxiliary detection capacitor C 2 have the limbs of human body near to or in contact with the upper edge of glass for vehicle window as sensing element with measurement, described main Detection capacitance C1 and described auxiliary detection capacitor C 2 are because the electric capacitance change signal that human body proximity produces is transferred to described sensor detection circuit, described sensor detection circuit produces according to the variable signal of the described main Detection capacitance detecting and described auxiliary detection electric capacity the control signal of controlling electric power window lifting motor action.

3, [title] a kind of power window clamp prevention sensor and method, [application number] CN201210015662.7, the patent documentation of [publication number] CN103174355A discloses a kind of power window clamp prevention sensor and method, be included on glass for vehicle window, along surface, at least two electric capacity and sensor detection circuit be set, the electric capacity that is wherein positioned at topmost forms main Detection capacitance C1, the electric capacity that is positioned at bottom forms auxiliary detection capacitor C 2, whether described main Detection capacitance C1 and described auxiliary detection capacitor C 2 have the limbs of human body near to or in contact with the upper edge of glass for vehicle window as sensing element with measurement, described main Detection capacitance C1 and described auxiliary detection capacitor C 2 are because the electric capacitance change signal that human body proximity produces is transferred to described sensor detection circuit, described sensor detection circuit produces according to the variable signal of the described main Detection capacitance detecting and described auxiliary detection electric capacity the control signal of controlling electric power window lifting motor action.

4, [title] a kind of vehicle window clipping prevention system based on LIN bus, [patent No.] CN200710195895.9, the patent documentation of [publication number] CN101182748 discloses a kind of vehicle window clipping prevention system based on LIN bus, this system couples together a LIN network of composition by LIN bus car body control module and anti-pinch module, car body control module is the host node of LIN network, anti-pinch module be LIN network from node, when car body control module receives after switch input signal, car body control module sends control command by LIN bus cycles property to anti-pinch module, anti-pinch module receives to be controlled motor after control command and turns round, and periodically send vehicle window motion state by LIN bus to car body control module, vehicle window position signalling.

Above four patent documentations have all been described the improvement to car car window anti-clipping system from different angles, thereby realize different object, reach certain Expected Results, but these car car window anti-clipping systems are because only use theory of mechanics or general embedded controller to control vehicle window, cause to run into vehicle window and clamp in the situation of obstruction and can not make in time vehicle window braking then decline.Listed above to car car window anti-clipping system do not solve vehicle window yet and in lifting process, shake too large problem, noise is still larger.

Summary of the invention

The invention provides the automatic anti-jamming device of a kind of vehicle window based on FPGA, solve that vehicle window jittering noise in lifting process is large, sensitivity is lower problem.

The automatic anti-jamming device of vehicle window that the present invention is based on FPGA comprises power module, sensor, memory, driver, photoelectric isolated chip and motor, adopt FPGA processor to control the work of all modules as the control centre of whole system, between FPGA processor and memory, the pattern of transfer of data is full-duplex mode.Photoelectric isolated chip, sensor, FPGA processor, memory, the same power module of the common use of five modules of driver; The output of current sensor and photoelectric isolated chip is directly received the input of FPGA processor without A/D converter, the output of FPGA processor connects driver, and driver is connected with motor.

The described FPGA of control centre processor model is EP1C6Q240C8, and what driver used is L298N DC motor driver.

The automatic anti-jamming device of vehicle window that the present invention is based on FPGA is little volume, low-power consumption, low cost, high-performance, addressing system is simple flexibly, the FPGA processor that execution efficiency is high is introduced car car window anti-clipping system, allow FPGA processor become the control centre of anti-clipping system, control centre is by controlling photoelectric isolated chip, sensor, power module, memory, driver, the work of coordinating between motor, replace general embedded controller with programmable gate array (FPGA), solve the problem that vehicle window can not make in time vehicle window braking then decline in the situation that occurring clamping obstruction, also solved car car window anti-clipping system shakes too large simultaneously in lifting process, the problem that noise ratio is larger, have simple in structure, safe and reliable advantage.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

In figure: 1-power module, 2-sensor, 3-memory, 4-driver, 5-FPGA processor, 6-photoelectric isolated chip, 7-motor.

The specific embodiment

As shown in Figure 1, the automatic anti-jamming device of vehicle window that the present invention is based on FPGA adopts the control centre of FPGA processor 5 as whole system, controls the work of all modules; Between FPGA processor 5 and memory 3, the pattern of transfer of data is full-duplex mode; The output of sensor 2 and photoelectric isolated chip 6 need not directly be received through A/D converter the input of FPGA processor 5; Photoelectric isolated chip 6, sensor 2, FPGA processor 5, memory 3, common same power supply, the i.e. power module 4 of using of 4 five modules of driver; The output of FPGA processor 5 connects driver 4; Driver 4 is connected with motor 7.Its operating principle is: car car window glass in automatic-ascending process, the driver module drive motors main story described in described FPGA processor control, current sensor detects the electric current of described motor, and the result detecting is sent back to FPGA processor.Current value when FPGA processor is processed rear and motor stabilizing to the real-time current signal receiving compares, judge whether difference is greater than certain certain value and judged result is stored in memory, meanwhile whether photoelectric isolated chip is blocked and is detected, and send detection signal to FPGA processor and process.When result is, when light is kept off and difference is above greater than certain certain value, to illustrate that there is obstruction at vehicle window place, now, described FPGA processor will be controlled the reversion of driver module drive motors.Motor reversal, automobile window glass declines at once.

That driver 4 uses is L298N.L298N is that a kind of high voltage, the large-current electric machine that ST company produces drives chip.This chip adopts 15 pin encapsulation.Main feature is that operating voltage is high, maximum operating voltage can reach 46V, output current is large, instantaneous peak current can reach 3A, continuous firing electric current is 2A, rated power 25W, includes the high-voltage large current full-bridge type driver of two H bridges, can be used for driving the inductive load such as dc motor and stepping motor, relay coil.Adopt the control of standard logic level signal, there are two and enable control end, in the situation that not affected by input signal, allow or forbid that device work has a logic power input, internal logic circuit part is worked under low-voltage, can external detection resistance, variable quantity is fed back to control circuit.Use L298N chip drives motor, can drive a two-phase stepping motor or four phase step motor, also can drive two direct current generators.

FPGA development platform is according to the direction of hyundai electronics development, integrate the comprehensive experiment development system of EDA and SOPC system development, except meet colleges and universities specially, the SOPC education experiment exploitation of undergraduate and graduate, be also the ideal tools of Electronic Design and electronic item exploitation.Whole development system is made up of core board EP1C6, SOPC development platform and expansion board, is configured to different development systems according to the different demand of user.

In sum, the automatic anti-jamming device of a kind of vehicle window based on FPGA of the present invention is simple in structure, is easy to realize, and functional strong, result of use is good, safe and reliable, solved car car window anti-clipping system in lifting process, shake too large, the problem that noise ratio is larger.

Claims

1. the automatic anti-jamming device of the vehicle window based on FPGA, comprise power module (1), sensor (2), memory (3), driver (4), photoelectric isolated chip (6) and motor (7), it is characterized in that: adopt FPGA processor (5) to control the work of all modules as the control centre of whole system, between FPGA processor (5) and memory (3), the pattern of transfer of data is full-duplex mode; Photoelectric isolated chip (6), sensor (2), FPGA processor (5), memory (3), the common same power module (1) that uses of (4) five modules of driver; The output of current sensor and photoelectric isolated chip (6) is directly received the input of FPGA processor (5) without A/D converter, the output of FPGA processor (5) connects driver (4), and driver (4) is connected with motor (7).

2. according to the automatic anti-jamming device of the vehicle window based on FPGA described in claim 1, it is characterized in that: the model of the FPGA of control centre processor (5) is EP1C6Q240C8.

3. according to the automatic anti-jamming device of the vehicle window based on FPGA described in claim 1, it is characterized in that: what driver (4) used is L298N DC motor driver.