WO2021249100A1 - Multi-functional mutual-induction vehicle power window anti-pinch controller and control method - Google Patents
Multi-functional mutual-induction vehicle power window anti-pinch controller and control method Download PDFInfo
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- WO2021249100A1 WO2021249100A1 PCT/CN2021/093502 CN2021093502W WO2021249100A1 WO 2021249100 A1 WO2021249100 A1 WO 2021249100A1 CN 2021093502 W CN2021093502 W CN 2021093502W WO 2021249100 A1 WO2021249100 A1 WO 2021249100A1
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- window
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- pinch
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- 238000004804 winding Methods 0.000 claims abstract description 48
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- 229910001006 Constantan Inorganic materials 0.000 claims description 6
- 241000282414 Homo sapiens Species 0.000 abstract description 7
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/689—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings specially adapted for vehicle windows
- E05F15/695—Control circuits therefor
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/70—Power-operated mechanisms for wings with automatic actuation
- E05F15/79—Power-operated mechanisms for wings with automatic actuation using time control
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/53—Type of wing
- E05Y2900/55—Windows
Definitions
- the invention relates to the technical field of motor control, in particular to a multifunctional mutual inductance type electric window anti-pinch controller and a control method.
- the technical problem to be solved by the present invention is to provide a multifunctional mutual inductance type electric window anti-pinch controller and control method to realize the anti-pinch function of the window.
- Multifunctional mutual inductance type power window anti-pinch controller including a control circuit and an armature BEM signal transformer T1, the control circuit includes a main control chip U1, and the armature BEM signal transformer T1 includes a primary winding and a secondary winding ;
- One end of the primary winding and one end of the secondary winding are grounded at the same time, the other end of the primary winding is used to connect the BEM ripple signal, and the other end of the secondary winding is connected to one end of the main control chip U1 Electrical connection
- the main control chip U1 is used to generate an anti-pinch control signal that can control the operation of the window motor M according to the pulse width deformation of the BEM ripple signal.
- a mutual inductance type electric window anti-pinch control method includes the steps:
- the beneficial effects of the present invention are: the multifunctional mutual inductance type electric window anti-pinch controller and control method, through the armature BEM signal transformer T1 to sample the BEM ripple signal when the window motor M rotates, and the main control chip U1 Monitor the pulse width change of the motor BEM signal, so as to accurately determine whether the power window is pinching an object during the ascent process, and when encountering an obstacle, timely control the window motor M to prevent the object or human body from being pinched. So as to realize the anti-pinch function of the window.
- FIG. 1 is a schematic circuit diagram of a multifunctional mutual inductance type electric window anti-pinch controller according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of the structure of an armature BEM signal transformer according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of the structure of the anti-pinch area involved in an embodiment of the present invention.
- FIG. 7 is a schematic flowchart of a mutual inductance type electric window anti-pinch control method according to an embodiment of the present invention.
- FIG. 8 is a schematic flowchart of a specific flow chart of a mutual inductance type power window anti-pinch control method according to an embodiment of the present invention.
- T1 armature BEM signal transformer; U1, main control chip; U2, operational amplifier; U3, three-terminal power supply regulator chip; U4, drive chip; U5, Schmitt trigger; D1, diode; M, car window Motor; K1, relay; R1-R17, resistance; C1-C8 and C12-C16, capacitor.
- a multifunctional mutual inductance type electric window anti-pinch controller including a control circuit and an armature BEM signal transformer T1, the control circuit includes a main control chip U1, the armature BEM signal
- the transformer T1 includes a primary winding and a secondary winding;
- One end of the primary winding and one end of the secondary winding are grounded at the same time, the other end of the primary winding is used to connect the BEM ripple signal, and the other end of the secondary winding is connected to one end of the main control chip U1 Electrical connection
- the main control chip U1 is used to generate an anti-pinch control signal that can control the operation of the window motor M according to the pulse width deformation of the BEM ripple signal.
- the beneficial effect of the present invention is that the BEM ripple signal of the window motor M is sampled through the armature BEM signal transformer T1 when the window motor M is rotating, and the main control chip U1 monitors the pulse width change of the motor BEM signal, Therefore, it can be accurately judged whether the power window is clamping an object during the ascent process, and when an obstacle is encountered, the window motor M is controlled in time to prevent the object or the human body from being pinched, thereby realizing the window anti-clamping function.
- control circuit further includes an operational amplifier U2, a Schmitt trigger U5 and a driving chip U4;
- the other end of the secondary winding is electrically connected to the sixth pin of the operational amplifier U2, and the seventh pin of the operational amplifier U2 is electrically connected to the first pin of the Schmitt trigger U5 after passing through an RC filter circuit.
- the twelfth pin of the Schmitt trigger U5 is electrically connected to the second pin of the main control chip U1;
- the tenth pin of the main control chip U1 is electrically connected to the first pin of the drive chip U4, and the eleventh pin of the main control chip U1 is electrically connected to the second and third pins of the drive chip U4 ,
- the seventh pin and the eighth pin of the driving chip U4 generate driving signals that can drive the relay K1 to control the operation of the window motor M.
- the BEM ripple signal is collected by the armature BEM signal transformer T1 and amplified by the operational amplifier U2, and then converted into a digital pulse signal after passing through the Schmitt trigger U5. Therefore, the main control chip U1 is the conversion of the BEM ripple signal The pulse width change of the subsequent digital pulse signal is processed.
- the signal is amplified by the operational amplifier U2, and the analog signal is converted into a digital pulse signal through the Schmitt trigger U5, which is provided to the main control chip U1 to determine whether an obstacle is encountered.
- the main control chip U1 determines whether an obstacle is encountered.
- resistor R13 one end of the resistor R13 is electrically connected to one end of the primary winding and the other end is electrically connected to the fourteenth pin of the main control chip U1.
- a resistor R13 is connected to one end of the primary winding to detect the change in the armature current of the motor, and send the change in the armature current of the motor to the main control chip U1 to implement overcurrent protection when the motor is locked.
- One end of the capacitor C12 is connected to the input voltage signal and the other end is simultaneously electrically connected to the second pin of the operational amplifier U2, one end of the resistor R15, and one end of the capacitor C6.
- the other end of the resistor R15 is electrically connected to the
- the other end of the capacitor C6 is simultaneously electrically connected to the first pin of the operational amplifier U2, and the first pin of the operational amplifier U2 is electrically connected to the eighteenth pin of the main control chip U1.
- the primary winding includes a primary magnetic ring and a constantan wire winding 1-2 turns of the primary magnetic ring.
- the constantan wire has a diameter of 1.5 mm and a resistance value of 5-10 milliohms.
- the secondary winding includes a secondary magnetic ring and an enameled wire winding 500-1000 turns of the secondary magnetic ring, and the diameter of the enameled wire is 0.1 mm.
- the primary coil and the secondary coil of the armature BEM signal transformer T1 are 1:500, and the BEM ripple signal when the window motor M is rotating is sampled by the transformer T1 and increased to a sufficient voltage amplitude (1:500 ), then connect to the sixth pin of the operational amplifier U2 for amplification.
- a voltage stabilizing circuit which includes a three-terminal power supply voltage stabilizing chip U3, a diode D1, a capacitor C7, and a capacitor C8;
- the anode of the diode D1 is connected to the input voltage signal and the cathode is simultaneously electrically connected to the first pin of the three-terminal power supply regulator chip U3 and one end of the capacitor C7, and the third terminal of the three-terminal power supply regulator chip U3
- the pin is electrically connected to the first pin of the main control chip U1, the eighth pin of the operational amplifier U2, the fourteenth pin of the Schmitt trigger U5, and one end of the capacitor C8 at the same time.
- the second pin of the terminal power supply regulator chip U3, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded.
- the input voltage signal is 12V
- the output voltage signal of the third pin of the three-terminal power supply regulator chip U3 is 5V.
- the three-terminal power supply regulator chip U3 regulates the input voltage of 12V into an output voltage of 5V to supply power to the main control chip U1, the operational amplifier U2 and the Schmitt trigger U5 for normal operation.
- the beneficial effect of the present invention is that the BEM ripple signal of the window motor M is sampled through the armature BEM signal transformer T1 when the window motor M is rotating, and the main control chip U1 monitors the pulse width change of the motor BEM signal, Therefore, it can be accurately judged whether the power window is clamping an object during the ascent process, and when an obstacle is encountered, the window motor M is controlled in time to prevent the object or the human body from being pinched, thereby realizing the window anti-clamping function.
- step S2 specifically includes the following steps:
- step S2 specifically includes the following steps:
- the key input signal is a window lift signal
- the window lift signal is a window lift signal
- the BEM pulse signal is counted up to obtain the real-time position of the car window
- the window lift signal is a window down signal
- the BEM pulse signal is counted down to obtain the real-time position of the car window
- the BEM pulse signal is a digital pulse signal obtained after the Schmitt trigger U5 converts the BEM ripple signal;
- the anti-pinch area is between the minimum value of the window rise and the maximum value of the window rise, and the range of the minimum value of the window rise is between 30mm and 80mm when the window rises from the bottom end, and the window rises The highest value ranges from 3mm to 5mm from the top of the car window.
- the rotation of the window motor M will drive the movement of the wire rope, thereby controlling the up and down movement of the window.
- the number of rotations of the motor is proportional to the distance of the window.
- the rotation of the motor rotor will cause the transformer to induce a pulse signal.
- the pulse signal output by the armature BEM signal transformer T1 can be counted through the main control chip U1 and recorded in the memory.
- the software controls the window to start running from the bottom end position, the window runs to the top end, the motor is blocked, and the counting starts from zero.
- the rising process is performed according to the current count value
- the falling process is performed according to the current count value.
- Count down Therefore, the current position of the window can be determined in real time through the pulse output of the armature BEM signal transformer T1 and the counting scheme, and the anti-pinch function of the window can be determined according to the above-determined anti-pinch area.
- the first embodiment of the present invention is:
- a multifunctional mutual inductance type electric window anti-pinch controller including a control circuit, a voltage stabilizing circuit, and an armature BEM signal transformer T1, wherein the control circuit includes a main control chip U1, an operational amplifier U2, and a Schmitt trigger U5 And the driving chip U4, the armature BEM signal transformer T1 includes a primary winding and a secondary winding; the voltage stabilizing circuit includes a three-terminal power supply voltage stabilizing chip U3, a diode D1, a capacitor C7 and a capacitor C8.
- one end of the primary winding and one end of the secondary winding are grounded at the same time, and the other end of the primary winding is connected to the third and seventh pins of the relay K1 to access the BEM ripple signal.
- the other end is electrically connected to the sixth pin of the operational amplifier U2, the seventh pin of the operational amplifier U2 is electrically connected to the first pin of the Schmitt trigger U5 after an RC filter circuit, and the twelfth pin of the Schmitt trigger U5
- the pin is electrically connected to the second pin of the main control chip U1 through a resistor R8, the tenth pin of the main control chip U1 is electrically connected to the first pin of the drive chip U4, and the eleventh pin of the main control chip U1 is electrically connected to the drive chip U4.
- the second pin and the third pin are electrically connected, and the seventh pin and the eighth pin of the driving chip U4 are respectively connected to the tenth pin and the fourth pin of the relay K1, thereby driving the relay K1 to control the driving signal of the
- the armature BEM signal transformer T1 is used to sample the BEM ripple signal of the window motor M when it is rotating, the signal is amplified by the operational amplifier U2, and the analog signal is converted into a digital pulse through the Schmitt trigger U5.
- the main control chip U1 monitors the pulse width change of the motor BEM signal to determine whether an obstacle is encountered, so as to accurately determine whether the power window is clamping an object during the ascent process, and output the corresponding output when encountering an obstacle
- the switch signal is sent to the driver chip U4, and then the relay K1 is driven by the output of the corresponding channel of the driver chip U4 to control the reverse of the window motor M, so that the window is lowered to prevent objects or human beings from being pinched, thereby realizing the window anti-pinch Features.
- the anode of the diode D1 is connected to the 12V input voltage signal and the cathode is simultaneously electrically connected to the first pin of the three-terminal power supply regulator chip U3 and one end of the capacitor C7, and the third terminal of the three-terminal power supply regulator chip U3
- the output voltage signal of the pin is 5V, and it is electrically connected to the first pin of the main control chip U1, the eighth pin of the operational amplifier U2, the fourteenth pin of the Schmitt trigger U5 and one end of the capacitor C8 at the same time, a three-terminal power supply
- the second pin of the voltage stabilizing chip U3, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded to supply power to the main control chip U1, the operational amplifier U2 and the Schmitt trigger U5 for normal operation.
- the RC filter circuit includes a resistor R17 and a capacitor C13, both of which are electrically connected to the seventh pin of the operational amplifier U2.
- the other end of the resistor R17 is electrically connected to the first pin of the Schmitt trigger U5.
- the capacitor The other end of C13 is grounded.
- the resistor R13 is further included.
- One end of the resistor R13 is electrically connected to one end of the primary winding and the other end is electrically connected to the fourteenth pin of the main control chip U1, so as to implement overcurrent protection when the motor is locked.
- it also includes a capacitor C12, a resistor R15, and a capacitor C6.
- One end of the capacitor C12 is connected to the input voltage signal and the other end is simultaneously electrically connected to the second pin of the operational amplifier U2, one end of the resistor R15, and one end of the capacitor C6.
- the other end of the resistor R15 and the other end of the capacitor C6 are simultaneously electrically connected to the first pin of the operational amplifier U2, and the first pin of the operational amplifier U2 is electrically connected to the eighteenth pin of the main control chip U1 via the resistor R12 to realize automatic parking Window closing function.
- the primary winding includes a primary magnetic ring and constantan wire winding 1-2 turns of the primary magnetic ring.
- the diameter of the constantan wire is 1.5mm and the resistance is 5-10 milliohms.
- the secondary winding includes a secondary magnetic ring and an enameled wire winding 500-1000 turns of the secondary magnetic ring, the diameter of the enameled wire is 0.1mm.
- this embodiment also includes a window up button and a down button, which are respectively connected to the 5th and 7th pins of the main control chip through a resistor R4 and a resistor R5, and a resistor R6 is respectively connected in parallel And resistor R7.
- the peripheral circuit of each chip is for the better work of the chip, and the electronic components are not described further, such as the resistor R9 and resistor R10 connected to the first pin and the second pin of the driving chip U4.
- the capacitor C4 connected between the fourth pin and the fifth pin and so on.
- the multifunctional mutual-inductance power window anti-pinch controller is a module.
- a “general distributed, local centralized” control scheme or a separate control scheme is adopted.
- the control of four windows is used as an ECU module, or the control of two windows as shown in Figure 5 is used as an ECU module, or a single window is used as an ECU module as shown in Figure 6. .
- the specific process of realizing the anti-pinch function refers to the second embodiment below.
- the second embodiment of the present invention is:
- a mutual inductance type electric window anti-pinch control method includes the steps:
- step S1 is to collect the BEM ripple signal by the armature BEM signal transformer T1, and the following step S2 is processed by the main control chip U1.
- step S2 specifically includes the following steps:
- the switch signal is output to drive the window motor M to move up and down. If the window lift signal is a window lift signal, the BEM The pulse signal is counted up to get the real-time position of the car window. If the window lift signal is a window down signal, the BEM pulse signal is counted down to get the real-time position of the car window. Among them, the BEM pulse signal is Schmitt trigger The digital pulse signal obtained by the converter U5 after converting the BEM ripple signal;
- the preset delay time is between 40ms-60ms. As shown in FIG. 8, the preset delay time is 50ms to avoid the influence of the instantaneous overshoot of the motor at the initial stage of starting the anti-pinch threshold.
- the minimum value range of the window rise is between 30mm and 80mm from the bottom of the window, and the maximum value range of the window rise is between 3mm and 5mm from the top, as shown in Figure 3.
- the minimum value range of the window rise is 50mm from the bottom of the window, and the maximum value of the window rise is 4mm from the top, that is, only the middle is the anti-pinch area, and both sides are non-anti-pinch Area.
- the present invention provides a multifunctional mutual inductance type electric window anti-pinch controller and control method, through the armature BEM signal transformer T1 to sample the BEM ripple signal of the window motor M when it is rotating,
- the three-terminal power supply regulator chip U3 stabilizes the 12V input voltage into 5V output voltage to supply power to the main control chip U1, operational amplifier U2 and Schmitt trigger U5 for normal operation, and signal amplification through operational amplifier U2 , And through Schmitt trigger U5 to convert the analog signal into a digital pulse signal, to provide the main control chip U1 to determine whether it encounters obstacles, when encountering obstacles, output the corresponding switch signal to the drive chip U4, and then
- the relay K1 is driven by the output of the corresponding channel of the driving chip U4 to control the reversal of the window motor M, so that the window is lowered to prevent the object or the human body from being pinched, thereby realizing the window anti-pinch function.
- a resistor R13 is connected to one end of the primary winding to detect the change in the armature current of the motor, and send the change in the armature current of the motor to the main control chip U1 to implement over-current protection when the motor is locked.
- the ripple signal of the motor running is collected by the capacitor C12.
- the signal is amplified by the internal unit of the resistor R15, capacitor C6 and operational amplifier U2 and then output to the main control chip U1 through the first pin of the operational amplifier U2 to realize the automatic window closing function when parking. .
- the window motor M is started with an appropriate delay, and then the BEM ripple signal is detected, which can avoid the influence of the instantaneous overshoot of the motor at the initial stage of the anti-pinch threshold setting; through the armature BEM signal transformer T1
- the pulse output and counting scheme can determine the current position of the window in real time, and determine whether the window is enabled with the anti-pinch function according to the above-determined anti-pinch area.
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Abstract
Disclosed are a multi-functional mutual-induction vehicle power window anti-pinch controller and control method. The multi-functional mutual-induction vehicle power window anti-pinch controller comprises a control circuit and an armature BEM signal transducer T1, wherein the control circuit comprises a main control chip U1, and the armature BEM signal transducer T1 comprises a primary winding and a secondary winding; one end of the primary winding and one end of the secondary winding are simultaneously grounded, the other end of the primary winding is used for connecting to BEM ripple signals, and the other end of the secondary winding is electrically connected to one end of the main control chip U1. In the present invention, BEM ripple signals of a vehicle window electric motor M when rotating are sampled by means of the armature BEM signal transducer T1, and pulse width change of electric motor BEM signals is monitored by the main control chip U1, such that whether an object is pinched by the vehicle power window during rising is accurately determined, and when there is an obstacle, the vehicle window electric motor M is controlled in a timely manner to prevent an object or a human body from being pinched, thereby realizing an anti-pinch function of the vehicle window.
Description
本发明涉及电机控制技术领域,特别涉及一种多功能互感式电动车窗防夹控制器和控制方法。The invention relates to the technical field of motor control, in particular to a multifunctional mutual inductance type electric window anti-pinch controller and a control method.
随着现代汽车电子技术的进步,汽车内传统的零部件及总成也在向机电一体化发展。其中,在汽车中大量应用电子设备,有利于提高汽车的舒适性和简便性,但有些电子设备在使用过程中存在着一定的安全风险,而随着人们对于安全性的要求越来越高,如何保证汽车的舒适性和简便性的情况下,提高电子设备在汽车中的安全性能,也成为了当下汽车发展的一个趋势。With the advancement of modern automobile electronic technology, traditional parts and assemblies in automobiles are also developing towards mechatronics. Among them, a large number of electronic devices are used in automobiles, which is conducive to improving the comfort and convenience of automobiles. However, some electronic devices have certain safety risks during the use process, and as people's requirements for safety become higher and higher, How to ensure the comfort and simplicity of the car and improve the safety performance of electronic equipment in the car has also become a trend in the current car development.
在现有技术中,为了方便驾驶员和乘客,大量汽车采用电动车窗,但许多电动车窗都不具有以下全部功能于一体:玻璃防夹功能、一键关窗功能、一键开窗功能以及停车自动关窗功能等等。特别是防夹功能,它更容易造成对乘客尤其是儿童的伤害。因此,为了安全起见,开发具有多功能的车窗防夹控制模块是完全必要的。In the prior art, for the convenience of drivers and passengers, a large number of cars use electric windows, but many electric windows do not have all the following functions in one: glass anti-pinch function, one-key window closing function, one-key window opening function And the automatic window closing function when parking and so on. Especially the anti-pinch function, it is more likely to cause injury to passengers, especially children. Therefore, for the sake of safety, it is absolutely necessary to develop a multi-functional window anti-pinch control module.
本发明所要解决的技术问题是:提供一种多功能互感式电动车窗防夹控制器和控制方法,以实现车窗防夹功能。The technical problem to be solved by the present invention is to provide a multifunctional mutual inductance type electric window anti-pinch controller and control method to realize the anti-pinch function of the window.
为了解决上述技术问题,本发明采用的技术方案为:In order to solve the above technical problems, the technical solutions adopted by the present invention are:
多功能互感式电动车窗防夹控制器,包括控制电路和电枢BEM信号互感器T1,所述控制电路包括主控芯片U1,所述电枢BEM信号互感器T1包括初级绕组和次级绕组;Multifunctional mutual inductance type power window anti-pinch controller, including a control circuit and an armature BEM signal transformer T1, the control circuit includes a main control chip U1, and the armature BEM signal transformer T1 includes a primary winding and a secondary winding ;
所述初级绕组的一端和所述次级绕组的一端同时接地,所述初级绕组的另一端用于接入BEM纹波信号,所述次级绕组的另一端与所述主控芯片U1的一端电连接;One end of the primary winding and one end of the secondary winding are grounded at the same time, the other end of the primary winding is used to connect the BEM ripple signal, and the other end of the secondary winding is connected to one end of the main control chip U1 Electrical connection
所述主控芯片U1用于根据所述BEM纹波信号的脉宽形变来生成能控制车窗电机M运行的防夹控制信号。The main control chip U1 is used to generate an anti-pinch control signal that can control the operation of the window motor M according to the pulse width deformation of the BEM ripple signal.
为了解决上述技术问题,本发明采用的另一种技术方案为:In order to solve the above technical problems, another technical solution adopted by the present invention is:
互感式电动车窗防夹控制方法,包括步骤:A mutual inductance type electric window anti-pinch control method includes the steps:
S1、采集车窗电机M的BEM纹波信号;S1. Collect the BEM ripple signal of the window motor M;
S2、判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行。S2. Determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if so, generate an anti-pinch control signal to control the operation of the window motor M.
本发明的有益效果在于:多功能互感式电动车窗防夹控制器和控制方法,通过电枢BEM信号互感器T1来采样车窗电机M在转动时的BEM纹波信号,由主控芯片U1监测电机BEM信号的脉宽变化情况,从而精确判断出电动车窗在上升过程中是否夹住物体,并在遇到障碍物时,及时控制车窗电机M,以防止物体或人体被夹伤,从而实现车窗防夹功能。The beneficial effects of the present invention are: the multifunctional mutual inductance type electric window anti-pinch controller and control method, through the armature BEM signal transformer T1 to sample the BEM ripple signal when the window motor M rotates, and the main control chip U1 Monitor the pulse width change of the motor BEM signal, so as to accurately determine whether the power window is pinching an object during the ascent process, and when encountering an obstacle, timely control the window motor M to prevent the object or human body from being pinched. So as to realize the anti-pinch function of the window.
图1为本发明实施例的多功能互感式电动车窗防夹控制器的电路示意图;1 is a schematic circuit diagram of a multifunctional mutual inductance type electric window anti-pinch controller according to an embodiment of the present invention;
图2为本发明实施例涉及的电枢BEM信号互感器的结构示意图;2 is a schematic diagram of the structure of an armature BEM signal transformer according to an embodiment of the present invention;
图3为本发明实施例涉及的防夹区域的结构示意图;3 is a schematic diagram of the structure of the anti-pinch area involved in an embodiment of the present invention;
图4至图6为本发明实施例涉及的ECU模块和车窗在不同实施方式下的对应示意图;4 to 6 are corresponding schematic diagrams of the ECU module and the vehicle window involved in the embodiment of the present invention in different implementation manners;
图7为本发明实施例的互感式电动车窗防夹控制方法的流程示意图;FIG. 7 is a schematic flowchart of a mutual inductance type electric window anti-pinch control method according to an embodiment of the present invention;
图8为本发明实施例的互感式电动车窗防夹控制方法的具体流程示意图。FIG. 8 is a schematic flowchart of a specific flow chart of a mutual inductance type power window anti-pinch control method according to an embodiment of the present invention.
标号说明:Label description:
T1、电枢BEM信号互感器;U1、主控芯片;U2、运算放大器;U3、三端电源稳压芯片;U4、驱动芯片;U5、斯密特触发器;D1、二极管;M、车窗电机;K1、继电器;R1-R17、电阻;C1-C8以及C12-C16、电容。T1, armature BEM signal transformer; U1, main control chip; U2, operational amplifier; U3, three-terminal power supply regulator chip; U4, drive chip; U5, Schmitt trigger; D1, diode; M, car window Motor; K1, relay; R1-R17, resistance; C1-C8 and C12-C16, capacitor.
为详细说明本发明的技术内容、所实现目的及效果,以下结合实施方式并配合附图予以说明。In order to describe in detail the technical content, the achieved objectives and effects of the present invention, the following description will be given in conjunction with the embodiments and the accompanying drawings.
请参照图1至图8,一种多功能互感式电动车窗防夹控制器,包括控制电路和电枢BEM信号互感器T1,所述控制电路包括主控芯片U1,所述电枢BEM信号互感器T1包括初级绕组和次级绕组;1 to 8, a multifunctional mutual inductance type electric window anti-pinch controller, including a control circuit and an armature BEM signal transformer T1, the control circuit includes a main control chip U1, the armature BEM signal The transformer T1 includes a primary winding and a secondary winding;
所述初级绕组的一端和所述次级绕组的一端同时接地,所述初级绕组的另一端用于接入BEM纹波信号,所述次级绕组的另一端与所述主控芯片U1的一端电连接;One end of the primary winding and one end of the secondary winding are grounded at the same time, the other end of the primary winding is used to connect the BEM ripple signal, and the other end of the secondary winding is connected to one end of the main control chip U1 Electrical connection
所述主控芯片U1用于根据所述BEM纹波信号的脉宽形变来生成能控制车窗电机M运行的防夹控制信号。The main control chip U1 is used to generate an anti-pinch control signal that can control the operation of the window motor M according to the pulse width deformation of the BEM ripple signal.
从上述描述可知,本发明的有益效果在于:通过电枢BEM信号互感器T1来采样车窗电机M在转动时的BEM纹波信号,由主控芯片U1监测电机BEM信号的脉宽变化情况,从而精确判断出电动车窗在上升过程中是否夹住物体,并在遇到障碍物时,及时控制车窗电机M,以防止物体或人体被夹伤,从而实现车窗防夹功能。From the above description, the beneficial effect of the present invention is that the BEM ripple signal of the window motor M is sampled through the armature BEM signal transformer T1 when the window motor M is rotating, and the main control chip U1 monitors the pulse width change of the motor BEM signal, Therefore, it can be accurately judged whether the power window is clamping an object during the ascent process, and when an obstacle is encountered, the window motor M is controlled in time to prevent the object or the human body from being pinched, thereby realizing the window anti-clamping function.
进一步地,所述控制电路还包括运算放大器U2、斯密特触发器U5和驱动芯片U4;Further, the control circuit further includes an operational amplifier U2, a Schmitt trigger U5 and a driving chip U4;
所述次级绕组的另一端与所述运算放大器U2的第六脚电连接,所述运算放大器U2的第七脚经过一个RC滤波电路后与所述斯密特触发器U5的第一脚电连接,所述斯密特触发器U5的第十二脚与所述主控芯片U1的第二脚电连接;The other end of the secondary winding is electrically connected to the sixth pin of the operational amplifier U2, and the seventh pin of the operational amplifier U2 is electrically connected to the first pin of the Schmitt trigger U5 after passing through an RC filter circuit. Connected, the twelfth pin of the Schmitt trigger U5 is electrically connected to the second pin of the main control chip U1;
所述主控芯片U1的第十脚与所述驱动芯片U4的第一脚电连接,所述主控芯片U1的第十一脚与所述驱动芯片U4的第二脚、第三脚电连接,所述驱动芯片U4的第七脚和第八脚生成能驱动继电器K1来控制车窗电机M运行的驱动信号。The tenth pin of the main control chip U1 is electrically connected to the first pin of the drive chip U4, and the eleventh pin of the main control chip U1 is electrically connected to the second and third pins of the drive chip U4 , The seventh pin and the eighth pin of the driving chip U4 generate driving signals that can drive the relay K1 to control the operation of the window motor M.
其中,BEM纹波信号经过电枢BEM信号互感器T1采集和运算放大器U2放大之后,通过斯密特触发器U5之后转换成数字脉冲信号,因此,主控芯片U1是对BEM纹波信号所转换后的数字脉冲信号的脉宽变化情况来进行处理。Among them, the BEM ripple signal is collected by the armature BEM signal transformer T1 and amplified by the operational amplifier U2, and then converted into a digital pulse signal after passing through the Schmitt trigger U5. Therefore, the main control chip U1 is the conversion of the BEM ripple signal The pulse width change of the subsequent digital pulse signal is processed.
从上述描述可知,通过运算放大器U2进行信号放大,并经过斯密特触发器U5将模拟信号转换成数字脉冲信号,以提供给主控芯片U1判断是否遇到障碍物,在遇到障碍物时,输出对应的开关信号至驱动芯片U4,然后通过驱动芯片U4相应通道的输出来驱动继电器K1以控制车窗电机M反转,使得车窗下降,以防止物体或人体被夹伤,从而实现车窗防夹功能。From the above description, it can be seen that the signal is amplified by the operational amplifier U2, and the analog signal is converted into a digital pulse signal through the Schmitt trigger U5, which is provided to the main control chip U1 to determine whether an obstacle is encountered. When an obstacle is encountered , Output the corresponding switch signal to the drive chip U4, and then drive the relay K1 through the output of the corresponding channel of the drive chip U4 to control the reverse of the window motor M, so that the window is lowered to prevent the object or the human body from being pinched, so as to realize the vehicle Window anti-pinch function.
进一步地,还包括电阻R13,所述电阻R13的一端与所述初级绕组的一端电连接且另一端与所述主控芯片U1的第十四脚电连接。Further, it further includes a resistor R13, one end of the resistor R13 is electrically connected to one end of the primary winding and the other end is electrically connected to the fourteenth pin of the main control chip U1.
从上述描述可知,在初级绕组的一端上接一个电阻R13来检测电机电枢电流变化,并将该电机电枢电流变化发送至主控芯片U1,以实现电机堵转时执行过流保护。It can be seen from the above description that a resistor R13 is connected to one end of the primary winding to detect the change in the armature current of the motor, and send the change in the armature current of the motor to the main control chip U1 to implement overcurrent protection when the motor is locked.
进一步地,还包括电容C12、电阻R15和电容C6;Further, it also includes a capacitor C12, a resistor R15 and a capacitor C6;
所述电容C12的一端接输入电压信号且另一端同时与所述运算放大器U2的第二脚、所述电阻R15的一端和所述电容C6的一端电连接,所述电阻R15的另一端和所述电容C6的另一端同时与所述运算放大器U2的第一脚电连接,所述运算放大器U2的第一脚与所述主控芯片U1的第十八脚电连接。One end of the capacitor C12 is connected to the input voltage signal and the other end is simultaneously electrically connected to the second pin of the operational amplifier U2, one end of the resistor R15, and one end of the capacitor C6. The other end of the resistor R15 is electrically connected to the The other end of the capacitor C6 is simultaneously electrically connected to the first pin of the operational amplifier U2, and the first pin of the operational amplifier U2 is electrically connected to the eighteenth pin of the main control chip U1.
从上述描述可知,由电容C12 采集到电机运转的纹波信号,该信号经电阻R15、电容C6及运算放大器U2的内部单元放大后通过运算放大器U2的第一脚输出到主控芯片U1来实现停车自动关窗功能。It can be seen from the above description that the ripple signal of the motor operation is collected by the capacitor C12. The signal is amplified by the internal unit of the resistor R15, the capacitor C6 and the operational amplifier U2 and then output to the main control chip U1 through the first pin of the operational amplifier U2. Automatic window closing function when parking.
进一步地,所述初级绕组包括初级磁环以及绕制所述初级磁环1-2圈的康铜丝,所述康铜丝的直径为1.5mm且阻值为5-10毫欧,所述次级绕组包括次级磁环以及绕制所述次级磁环500-1000圈的漆包线,所述漆包线的直径为0.1mm。Further, the primary winding includes a primary magnetic ring and a constantan wire winding 1-2 turns of the primary magnetic ring. The constantan wire has a diameter of 1.5 mm and a resistance value of 5-10 milliohms. The secondary winding includes a secondary magnetic ring and an enameled wire winding 500-1000 turns of the secondary magnetic ring, and the diameter of the enameled wire is 0.1 mm.
从上述描述可知,电枢BEM信号互感器T1的初级线圈与次级线圈是1:500,车窗电机M在转动时的BEM纹波信号经互感器T1采样提升到足够电压幅度(1:500),再接入运算放大器U2第六脚进行放大。It can be seen from the above description that the primary coil and the secondary coil of the armature BEM signal transformer T1 are 1:500, and the BEM ripple signal when the window motor M is rotating is sampled by the transformer T1 and increased to a sufficient voltage amplitude (1:500 ), then connect to the sixth pin of the operational amplifier U2 for amplification.
进一步地,还包括稳压电路,所述稳压电路包括三端电源稳压芯片U3、二极管D1、电容C7和电容C8;Further, it also includes a voltage stabilizing circuit, which includes a three-terminal power supply voltage stabilizing chip U3, a diode D1, a capacitor C7, and a capacitor C8;
所述二极管D1的阳极接入输入电压信号且阴极同时与所述三端电源稳压芯片U3的第一脚、所述电容C7的一端电连接,所述三端电源稳压芯片U3的第三脚同时与所述主控芯片U1的第一脚、所述运算放大器U2的第八脚、所述斯密特触发器U5的第十四脚以及所述电容C8的一端电连接,所述三端电源稳压芯片U3的第二脚、所述电容C7的另一端以及所述电容C8的另一端接地。The anode of the diode D1 is connected to the input voltage signal and the cathode is simultaneously electrically connected to the first pin of the three-terminal power supply regulator chip U3 and one end of the capacitor C7, and the third terminal of the three-terminal power supply regulator chip U3 The pin is electrically connected to the first pin of the main control chip U1, the eighth pin of the operational amplifier U2, the fourteenth pin of the Schmitt trigger U5, and one end of the capacitor C8 at the same time. The second pin of the terminal power supply regulator chip U3, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded.
进一步地,所述输入电压信号为12V,所述三端电源稳压芯片U3的第三脚的输出电压信号为5V。Further, the input voltage signal is 12V, and the output voltage signal of the third pin of the three-terminal power supply regulator chip U3 is 5V.
从上述描述可知,由三端电源稳压芯片U3来将12V的输入电压稳压成5V的输出电压,以供电给主控芯片U1、运算放大器U2和斯密特触发器U5进行正常工作。It can be seen from the above description that the three-terminal power supply regulator chip U3 regulates the input voltage of 12V into an output voltage of 5V to supply power to the main control chip U1, the operational amplifier U2 and the Schmitt trigger U5 for normal operation.
请参照图1至图8,互感式电动车窗防夹控制方法,包括步骤:Please refer to Figure 1 to Figure 8, the mutual inductance type electric window anti-pinch control method, including the steps:
S1、采集车窗电机M的BEM纹波信号;S1. Collect the BEM ripple signal of the window motor M;
S2、判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行。S2. Determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if so, generate an anti-pinch control signal to control the operation of the window motor M.
从上述描述可知,本发明的有益效果在于:通过电枢BEM信号互感器T1来采样车窗电机M在转动时的BEM纹波信号,由主控芯片U1监测电机BEM信号的脉宽变化情况,从而精确判断出电动车窗在上升过程中是否夹住物体,并在遇到障碍物时,及时控制车窗电机M,以防止物体或人体被夹伤,从而实现车窗防夹功能。From the above description, the beneficial effect of the present invention is that the BEM ripple signal of the window motor M is sampled through the armature BEM signal transformer T1 when the window motor M is rotating, and the main control chip U1 monitors the pulse width change of the motor BEM signal, Therefore, it can be accurately judged whether the power window is clamping an object during the ascent process, and when an obstacle is encountered, the window motor M is controlled in time to prevent the object or the human body from being pinched, thereby realizing the window anti-clamping function.
进一步地,所述步骤S2具体包括以下步骤:Further, the step S2 specifically includes the following steps:
判断所述车窗电机M启动后的时间是否到达预设延时时长,若是,则判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行,所述预设延时时长为40ms-60ms之间。It is determined whether the time after the start of the window motor M has reached the preset delay time, and if it is, it is determined whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if it is, an anti-pinch control signal is generated to control The window motor M runs, and the preset delay time is between 40ms-60ms.
从上述描述可知,车窗电机M刚刚启动时,由于电机的反电动势还没有建立,因而电流会有短时间的较大幅值,这时的电流幅值往往比所设定的过流保护电流阈值还要大,需要将这种电流幅值较大的状态和在车窗上升过程中遇到障碍物区分开来。所以车窗电机M启动后进行适当的延时,再进行BEM纹波信号的检测,这样可以避免电机启动初期瞬时过冲对过流阈值设定和防夹阈值设定的影响。It can be seen from the above description that when the window motor M is just started, since the back electromotive force of the motor has not been established, the current will have a relatively large value for a short time, and the current amplitude at this time is often greater than the set overcurrent protection current threshold. It is even larger, and it is necessary to distinguish this state with a large current amplitude from obstacles encountered during the ascent of the window. Therefore, after starting the window motor M, perform an appropriate delay and then perform the detection of the BEM ripple signal, so as to avoid the influence of the instantaneous overshoot in the initial stage of the motor start on the overcurrent threshold setting and the anti-pinch threshold setting.
进一步地,所述步骤S2具体包括以下步骤:Further, the step S2 specifically includes the following steps:
读取车窗当前位置和按键输入信号,若所述按键输入信号为车窗升降信号,则输出开关信号来驱动车窗电机M进行上下升降运动,若所述车窗升降信号为车窗上升信号,则对所述BEM脉冲信号进行加计数,以得到车窗实时位置,若所述车窗升降信号为车窗下降信号,则对所述BEM脉冲信号进行减计数,以得到车窗实时位置,所述BEM脉冲信号为斯密特触发器U5转换所述BEM纹波信号后所得到的数字脉冲信号;Read the current position of the car window and the key input signal. If the key input signal is a window lift signal, output a switch signal to drive the window motor M to move up and down. If the window lift signal is a window lift signal , The BEM pulse signal is counted up to obtain the real-time position of the car window, if the window lift signal is a window down signal, the BEM pulse signal is counted down to obtain the real-time position of the car window, The BEM pulse signal is a digital pulse signal obtained after the Schmitt trigger U5 converts the BEM ripple signal;
判断所述车窗实时位置是否处于防夹区域,若是,则判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M反转,所述防夹区域在车窗上升最低值和车窗上升最高值之间,所述车窗上升最低值的取值范围为车窗从底端上升30mm至80mm之间,所述车窗上升最高值的取值范围为车窗上升到离顶端3mm至5mm之间。Determine whether the real-time position of the vehicle window is in the anti-pinch area, if so, determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if it is, generate an anti-pinch control signal to control the reverse rotation of the window motor M , The anti-pinch area is between the minimum value of the window rise and the maximum value of the window rise, and the range of the minimum value of the window rise is between 30mm and 80mm when the window rises from the bottom end, and the window rises The highest value ranges from 3mm to 5mm from the top of the car window.
从上述描述可知,车窗电机M的转动会带动钢丝绳的运动,从而控制车窗的上下移动。在车窗移动过程中,电机转动的圈数和车窗的运动距离成正比,电机转子转动会使互感器感应出脉冲信号。当车窗从最低位置升到顶部过程中,可以通过主控芯片U1对电枢BEM信号互感器T1输出的脉冲信号进行计数,并记录在存储器中。之后,软件控制车窗从最底端位置开始运行,车窗运行到最顶端电机堵转停止,且计数从零开始,上升过程根据当前的计数值进行加计数,下降过程根据当前的计数值进行减计数。因此,通过电枢BEM信号互感器T1的脉冲输出及计数方案可实时确定车窗的当前位置,并根据上述确定的防夹区域确定车窗是否启用防夹功能。It can be seen from the above description that the rotation of the window motor M will drive the movement of the wire rope, thereby controlling the up and down movement of the window. During the movement of the window, the number of rotations of the motor is proportional to the distance of the window. The rotation of the motor rotor will cause the transformer to induce a pulse signal. When the window is raised from the lowest position to the top, the pulse signal output by the armature BEM signal transformer T1 can be counted through the main control chip U1 and recorded in the memory. After that, the software controls the window to start running from the bottom end position, the window runs to the top end, the motor is blocked, and the counting starts from zero. The rising process is performed according to the current count value, and the falling process is performed according to the current count value. Count down. Therefore, the current position of the window can be determined in real time through the pulse output of the armature BEM signal transformer T1 and the counting scheme, and the anti-pinch function of the window can be determined according to the above-determined anti-pinch area.
请参照图1至图8,本发明的实施例一为:Please refer to FIG. 1 to FIG. 8, the first embodiment of the present invention is:
一种多功能互感式电动车窗防夹控制器,包括控制电路、稳压电路和电枢BEM信号互感器T1,其中,控制电路包括主控芯片U1、运算放大器U2、斯密特触发器U5和驱动芯片U4,电枢BEM信号互感器T1包括初级绕组和次级绕组;稳压电路包括三端电源稳压芯片U3、二极管D1、电容C7和电容C8。A multifunctional mutual inductance type electric window anti-pinch controller, including a control circuit, a voltage stabilizing circuit, and an armature BEM signal transformer T1, wherein the control circuit includes a main control chip U1, an operational amplifier U2, and a Schmitt trigger U5 And the driving chip U4, the armature BEM signal transformer T1 includes a primary winding and a secondary winding; the voltage stabilizing circuit includes a three-terminal power supply voltage stabilizing chip U3, a diode D1, a capacitor C7 and a capacitor C8.
如图1所示,初级绕组的一端和次级绕组的一端同时接地,初级绕组的另一端通过与继电器K1的第三脚和第七脚连接,以接入BEM纹波信号,次级绕组的另一端与运算放大器U2的第六脚电连接,运算放大器U2的第七脚经过一个RC滤波电路后与斯密特触发器U5的第一脚电连接,斯密特触发器U5的第十二脚通过一个电阻R8与主控芯片U1的第二脚电连接,主控芯片U1的第十脚与驱动芯片U4的第一脚电连接,主控芯片U1的第十一脚与驱动芯片U4的第二脚、第三脚电连接,驱动芯片U4的第七脚和第八脚分别与继电器K1的第十脚和第四脚连接,从而驱动继电器K1来控制车窗电机M运行的驱动信号。As shown in Figure 1, one end of the primary winding and one end of the secondary winding are grounded at the same time, and the other end of the primary winding is connected to the third and seventh pins of the relay K1 to access the BEM ripple signal. The other end is electrically connected to the sixth pin of the operational amplifier U2, the seventh pin of the operational amplifier U2 is electrically connected to the first pin of the Schmitt trigger U5 after an RC filter circuit, and the twelfth pin of the Schmitt trigger U5 The pin is electrically connected to the second pin of the main control chip U1 through a resistor R8, the tenth pin of the main control chip U1 is electrically connected to the first pin of the drive chip U4, and the eleventh pin of the main control chip U1 is electrically connected to the drive chip U4. The second pin and the third pin are electrically connected, and the seventh pin and the eighth pin of the driving chip U4 are respectively connected to the tenth pin and the fourth pin of the relay K1, thereby driving the relay K1 to control the driving signal of the window motor M operation.
即本实施例通过电枢BEM信号互感器T1来采样车窗电机M在转动时的BEM纹波信号,通过运算放大器U2进行信号放大,并经过斯密特触发器U5将模拟信号转换成数字脉冲信号,由主控芯片U1监测电机BEM信号的脉宽变化情况来判断是否遇到障碍物,从而精确判断出电动车窗在上升过程中是否夹住物体,并在遇到障碍物时,输出对应的开关信号至驱动芯片U4,然后通过驱动芯片U4相应通道的输出来驱动继电器K1以控制车窗电机M反转,使得车窗下降,以防止物体或人体被夹伤,从而实现车窗防夹功能。That is, in this embodiment, the armature BEM signal transformer T1 is used to sample the BEM ripple signal of the window motor M when it is rotating, the signal is amplified by the operational amplifier U2, and the analog signal is converted into a digital pulse through the Schmitt trigger U5. Signal, the main control chip U1 monitors the pulse width change of the motor BEM signal to determine whether an obstacle is encountered, so as to accurately determine whether the power window is clamping an object during the ascent process, and output the corresponding output when encountering an obstacle The switch signal is sent to the driver chip U4, and then the relay K1 is driven by the output of the corresponding channel of the driver chip U4 to control the reverse of the window motor M, so that the window is lowered to prevent objects or human beings from being pinched, thereby realizing the window anti-pinch Features.
如图1所示,二极管D1的阳极接入12V的输入电压信号且阴极同时与三端电源稳压芯片U3的第一脚、电容C7的一端电连接,三端电源稳压芯片U3的第三脚的输出电压信号为5V,它同时与主控芯片U1的第一脚、运算放大器U2的第八脚、斯密特触发器U5的第十四脚以及电容C8的一端电连接,三端电源稳压芯片U3的第二脚、电容C7的另一端以及电容C8的另一端接地,以供电给主控芯片U1、运算放大器U2和斯密特触发器U5进行正常工作。As shown in Figure 1, the anode of the diode D1 is connected to the 12V input voltage signal and the cathode is simultaneously electrically connected to the first pin of the three-terminal power supply regulator chip U3 and one end of the capacitor C7, and the third terminal of the three-terminal power supply regulator chip U3 The output voltage signal of the pin is 5V, and it is electrically connected to the first pin of the main control chip U1, the eighth pin of the operational amplifier U2, the fourteenth pin of the Schmitt trigger U5 and one end of the capacitor C8 at the same time, a three-terminal power supply The second pin of the voltage stabilizing chip U3, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded to supply power to the main control chip U1, the operational amplifier U2 and the Schmitt trigger U5 for normal operation.
如图1所示,RC滤波电路包括电阻R17和电容C13,两者同时与运算放大器U2的第七脚电连接,电阻R17的另一端与斯密特触发器U5的第一脚电连接,电容C13的另一端接地。As shown in Figure 1, the RC filter circuit includes a resistor R17 and a capacitor C13, both of which are electrically connected to the seventh pin of the operational amplifier U2. The other end of the resistor R17 is electrically connected to the first pin of the Schmitt trigger U5. The capacitor The other end of C13 is grounded.
在本实施例中,还包括电阻R13,电阻R13的一端与初级绕组的一端电连接且另一端与主控芯片U1的第十四脚电连接,以实现电机堵转时执行过流保护。In this embodiment, the resistor R13 is further included. One end of the resistor R13 is electrically connected to one end of the primary winding and the other end is electrically connected to the fourteenth pin of the main control chip U1, so as to implement overcurrent protection when the motor is locked.
在本实施例中,还包括电容C12、电阻R15和电容C6,电容C12的一端接输入电压信号且另一端同时与运算放大器U2的第二脚、电阻R15的一端和电容C6的一端电连接,电阻R15的另一端和电容C6的另一端同时与运算放大器U2的第一脚电连接,运算放大器U2的第一脚经电阻R12与主控芯片U1的第十八脚电连接,以实现停车自动关窗功能。In this embodiment, it also includes a capacitor C12, a resistor R15, and a capacitor C6. One end of the capacitor C12 is connected to the input voltage signal and the other end is simultaneously electrically connected to the second pin of the operational amplifier U2, one end of the resistor R15, and one end of the capacitor C6. The other end of the resistor R15 and the other end of the capacitor C6 are simultaneously electrically connected to the first pin of the operational amplifier U2, and the first pin of the operational amplifier U2 is electrically connected to the eighteenth pin of the main control chip U1 via the resistor R12 to realize automatic parking Window closing function.
如图2所示,在本实施例中,初级绕组包括初级磁环以及绕制初级磁环1-2圈的康铜丝,康铜丝的直径为1.5mm且阻值为5-10毫欧,次级绕组包括次级磁环以及绕制次级磁环500-1000圈的漆包线,漆包线的直径为0.1mm。As shown in Figure 2, in this embodiment, the primary winding includes a primary magnetic ring and constantan wire winding 1-2 turns of the primary magnetic ring. The diameter of the constantan wire is 1.5mm and the resistance is 5-10 milliohms. , The secondary winding includes a secondary magnetic ring and an enameled wire winding 500-1000 turns of the secondary magnetic ring, the diameter of the enameled wire is 0.1mm.
如图1所述,本实施例中还包括车窗上升键和下降键,其分别通过一个电阻R4和一个电阻R5与主控芯片的第5脚和第七脚连接,并且分别并联一个电阻R6和电阻R7。另外对于每个芯片的外围电路是为了芯片的更好的工作,不对此对电子元器件做进一步的描述说明,比如驱动芯片U4的第一脚、第二脚上连接的电阻R9、电阻R10,第四脚和第五脚之间连接的电容C4等等。As shown in Figure 1, this embodiment also includes a window up button and a down button, which are respectively connected to the 5th and 7th pins of the main control chip through a resistor R4 and a resistor R5, and a resistor R6 is respectively connected in parallel And resistor R7. In addition, the peripheral circuit of each chip is for the better work of the chip, and the electronic components are not described further, such as the resistor R9 and resistor R10 connected to the first pin and the second pin of the driving chip U4. The capacitor C4 connected between the fourth pin and the fifth pin and so on.
在本实施例中,多功能互感式电动车窗防夹控制器是一个模块,在整个车窗控制系统中,采用了一种“总体分布,局部集中式”的控制方案或单独控制方案。比如,如图4所示,四个车窗的控制作为一个ECU模块,或如图5所示将两个车窗的控制作为一个ECU模块,或如图6所示单个车窗作为一个ECU模块。In this embodiment, the multifunctional mutual-inductance power window anti-pinch controller is a module. In the entire window control system, a “general distributed, local centralized” control scheme or a separate control scheme is adopted. For example, as shown in Figure 4, the control of four windows is used as an ECU module, or the control of two windows as shown in Figure 5 is used as an ECU module, or a single window is used as an ECU module as shown in Figure 6. .
其中,在本实施例一的基础上,实现防夹功能的具体过程参照下述实施例二。Among them, on the basis of the first embodiment, the specific process of realizing the anti-pinch function refers to the second embodiment below.
请参照图1至图8,本发明的实施例二为:Please refer to FIG. 1 to FIG. 8, the second embodiment of the present invention is:
互感式电动车窗防夹控制方法,包括步骤:A mutual inductance type electric window anti-pinch control method includes the steps:
S1、采集车窗电机M的BEM纹波信号;S1. Collect the BEM ripple signal of the window motor M;
在本实施例中,步骤S1是由电枢BEM信号互感器T1进行BEM纹波信号的采集,而下述的步骤S2是由主控芯片U1进行处理。In this embodiment, step S1 is to collect the BEM ripple signal by the armature BEM signal transformer T1, and the following step S2 is processed by the main control chip U1.
S2、判断BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行。S2. Determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if so, generate an anti-pinch control signal to control the operation of the window motor M.
在本实施例中,步骤S2具体包括以下步骤:In this embodiment, step S2 specifically includes the following steps:
读取车窗当前位置和按键输入信号,若按键输入信号为车窗升降信号,则输出开关信号来驱动车窗电机M进行上下升降运动,若车窗升降信号为车窗上升信号,则对BEM脉冲信号进行加计数,以得到车窗实时位置,若车窗升降信号为车窗下降信号,则对BEM脉冲信号进行减计数,以得到车窗实时位置,其中,BEM脉冲信号为斯密特触发器U5转换所述BEM纹波信号后所得到的数字脉冲信号;Read the current position of the window and the key input signal. If the key input signal is a window lift signal, the switch signal is output to drive the window motor M to move up and down. If the window lift signal is a window lift signal, the BEM The pulse signal is counted up to get the real-time position of the car window. If the window lift signal is a window down signal, the BEM pulse signal is counted down to get the real-time position of the car window. Among them, the BEM pulse signal is Schmitt trigger The digital pulse signal obtained by the converter U5 after converting the BEM ripple signal;
判断车窗电机M启动后的时间是否到达预设延时时长,若是,通过主控芯片U1判断车窗实时位置是否处于防夹区域,若是,则判断BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M反转,防夹区域在车窗上升最低值和车窗上升最高值之间。Judge whether the time after the start of the window motor M reaches the preset delay time, if it is, judge whether the real-time position of the window is in the anti-pinch area through the main control chip U1, if it is, judge whether the pulse width deformation of the BEM ripple signal is greater than the preset Set the threshold, and if yes, generate an anti-pinch control signal to control the reverse of the window motor M, and the anti-pinch area is between the lowest value of the window rise and the highest value of the window rise.
在本实施例中,预设延时时长为40ms-60ms之间,如图8所示,预设延时时长为50ms,以避免电机启动初期瞬时过冲对防夹阈值设定的影响。车窗上升最低值的取值范围为车窗从底端上升30mm至80mm之间,车窗上升最高值的取值范围为车窗上升到离顶端3mm至5mm之间,如图3所示,车窗上升最低值的取值范围为车窗从底端上升50mm,车窗上升最高值的取值范围为车窗上升到离顶端4mm,即只有中间为防夹区域,两边均为非防夹区。In this embodiment, the preset delay time is between 40ms-60ms. As shown in FIG. 8, the preset delay time is 50ms to avoid the influence of the instantaneous overshoot of the motor at the initial stage of starting the anti-pinch threshold. The minimum value range of the window rise is between 30mm and 80mm from the bottom of the window, and the maximum value range of the window rise is between 3mm and 5mm from the top, as shown in Figure 3. The minimum value range of the window rise is 50mm from the bottom of the window, and the maximum value of the window rise is 4mm from the top, that is, only the middle is the anti-pinch area, and both sides are non-anti-pinch Area.
综上所述,本发明提供的一种多功能互感式电动车窗防夹控制器和控制方法,通过电枢BEM信号互感器T1来采样车窗电机M在转动时的BEM纹波信号,由三端电源稳压芯片U3来将12V的输入电压稳压成5V的输出电压,以供电给主控芯片U1、运算放大器U2和斯密特触发器U5进行正常工作,通过运算放大器U2进行信号放大,并经过斯密特触发器U5将模拟信号转换成数字脉冲信号,以提供给主控芯片U1判断是否遇到障碍物,在遇到障碍物时,输出对应的开关信号至驱动芯片U4,然后通过驱动芯片U4相应通道的输出来驱动继电器K1以控制车窗电机M反转,使得车窗下降,以防止物体或人体被夹伤,从而实现车窗防夹功能。在初级绕组的一端上接一个电阻R13来检测电机电枢电流变化,并将该电机电枢电流变化发送至主控芯片U1,以实现电机堵转时执行过流保护。由电容C12 采集到电机运转的纹波信号,该信号经电阻R15、电容C6及运算放大器U2的内部单元放大后通过运算放大器U2的第一脚输出到主控芯片U1来实现停车自动关窗功能。同时,车窗电机M启动后进行适当的延时,再进行BEM纹波信号的检测,这样可以避免电机启动初期瞬时过冲对防夹阈值设定的影响;通过电枢BEM信号互感器T1的脉冲输出及计数方案可实时确定车窗的当前位置,并根据上述确定的防夹区域确定车窗是否启用防夹功能。In summary, the present invention provides a multifunctional mutual inductance type electric window anti-pinch controller and control method, through the armature BEM signal transformer T1 to sample the BEM ripple signal of the window motor M when it is rotating, The three-terminal power supply regulator chip U3 stabilizes the 12V input voltage into 5V output voltage to supply power to the main control chip U1, operational amplifier U2 and Schmitt trigger U5 for normal operation, and signal amplification through operational amplifier U2 , And through Schmitt trigger U5 to convert the analog signal into a digital pulse signal, to provide the main control chip U1 to determine whether it encounters obstacles, when encountering obstacles, output the corresponding switch signal to the drive chip U4, and then The relay K1 is driven by the output of the corresponding channel of the driving chip U4 to control the reversal of the window motor M, so that the window is lowered to prevent the object or the human body from being pinched, thereby realizing the window anti-pinch function. A resistor R13 is connected to one end of the primary winding to detect the change in the armature current of the motor, and send the change in the armature current of the motor to the main control chip U1 to implement over-current protection when the motor is locked. The ripple signal of the motor running is collected by the capacitor C12. The signal is amplified by the internal unit of the resistor R15, capacitor C6 and operational amplifier U2 and then output to the main control chip U1 through the first pin of the operational amplifier U2 to realize the automatic window closing function when parking. . At the same time, the window motor M is started with an appropriate delay, and then the BEM ripple signal is detected, which can avoid the influence of the instantaneous overshoot of the motor at the initial stage of the anti-pinch threshold setting; through the armature BEM signal transformer T1 The pulse output and counting scheme can determine the current position of the window in real time, and determine whether the window is enabled with the anti-pinch function according to the above-determined anti-pinch area.
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等同变换,或直接或间接运用在相关的技术领域,均同理包括在本发明的专利保护范围内。The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent transformations made using the content of the description and drawings of the present invention, or directly or indirectly applied in related technical fields, are included in the same reasoning. Within the scope of patent protection of the present invention.
Claims (10)
- 一种多功能互感式电动车窗防夹控制器,其特征在于:包括控制电路和电枢BEM信号互感器T1,所述控制电路包括主控芯片U1,所述电枢BEM信号互感器T1包括初级绕组和次级绕组;A multifunctional mutual inductance type electric window anti-pinch controller, which is characterized in that it includes a control circuit and an armature BEM signal transformer T1, the control circuit includes a main control chip U1, and the armature BEM signal transformer T1 includes Primary winding and secondary winding;所述初级绕组的一端和所述次级绕组的一端同时接地,所述初级绕组的另一端用于接入BEM纹波信号,所述次级绕组的另一端与所述主控芯片U1的一端电连接;One end of the primary winding and one end of the secondary winding are grounded at the same time, the other end of the primary winding is used to connect the BEM ripple signal, and the other end of the secondary winding is connected to one end of the main control chip U1 Electrical connection所述主控芯片U1用于根据所述BEM纹波信号的脉宽形变来生成能控制车窗电机M运行的防夹控制信号。The main control chip U1 is used to generate an anti-pinch control signal that can control the operation of the window motor M according to the pulse width deformation of the BEM ripple signal.
- 根据权利要求1所述的多功能互感式电动车窗防夹控制器,其特征在于:所述控制电路还包括运算放大器U2、斯密特触发器U5和驱动芯片U4;The multifunctional mutual inductance type power window anti-pinch controller according to claim 1, wherein the control circuit further comprises an operational amplifier U2, a Schmitt trigger U5 and a driving chip U4;所述次级绕组的另一端与所述运算放大器U2的第六脚电连接,所述运算放大器U2的第七脚经过一个RC滤波电路后与所述斯密特触发器U5的第一脚电连接,所述斯密特触发器U5的第十二脚与所述主控芯片U1的第二脚电连接;The other end of the secondary winding is electrically connected to the sixth pin of the operational amplifier U2, and the seventh pin of the operational amplifier U2 is electrically connected to the first pin of the Schmitt trigger U5 after passing through an RC filter circuit. Connected, the twelfth pin of the Schmitt trigger U5 is electrically connected to the second pin of the main control chip U1;所述主控芯片U1的第十脚与所述驱动芯片U4的第一脚电连接,所述主控芯片U1的第十一脚与所述驱动芯片U4的第二脚、第三脚电连接,所述驱动芯片U4的第七脚和第八脚生成能驱动继电器K1来控制车窗电机M运行的驱动信号。The tenth pin of the main control chip U1 is electrically connected to the first pin of the drive chip U4, and the eleventh pin of the main control chip U1 is electrically connected to the second and third pins of the drive chip U4 , The seventh pin and the eighth pin of the driving chip U4 generate a driving signal capable of driving the relay K1 to control the operation of the window motor M.
- 根据权利要求2所述的多功能互感式电动车窗防夹控制器,其特征在于:还包括电阻R13,所述电阻R13的一端与所述初级绕组的一端电连接且另一端与所述主控芯片U1的第十四脚电连接。The multifunctional mutual inductance power window anti-pinch controller according to claim 2, characterized in that it further comprises a resistor R13, one end of the resistor R13 is electrically connected to one end of the primary winding and the other end is connected to the main winding. The fourteenth pin of the control chip U1 is electrically connected.
- 根据权利要求2所述的多功能互感式电动车窗防夹控制器,其特征在于:还包括电容C12、电阻R15和电容C6;The multifunctional mutual inductance type power window anti-pinch controller according to claim 2, characterized in that it further comprises a capacitor C12, a resistor R15 and a capacitor C6;所述电容C12的一端接输入电压信号且另一端同时与所述运算放大器U2的第二脚、所述电阻R15的一端和所述电容C6的一端电连接,所述电阻R15的另一端和所述电容C6的另一端同时与所述运算放大器U2的第一脚电连接,所述运算放大器U2的第一脚与所述主控芯片U1的第十八脚电连接。One end of the capacitor C12 is connected to the input voltage signal and the other end is simultaneously electrically connected to the second pin of the operational amplifier U2, one end of the resistor R15, and one end of the capacitor C6. The other end of the resistor R15 is electrically connected to the The other end of the capacitor C6 is simultaneously electrically connected to the first pin of the operational amplifier U2, and the first pin of the operational amplifier U2 is electrically connected to the eighteenth pin of the main control chip U1.
- 根据权利要求1至4任一所述的多功能互感式电动车窗防夹控制器,其特征在于:所述初级绕组包括初级磁环以及绕制所述初级磁环1-2圈的康铜丝,所述康铜丝的直径为1.5mm且阻值为5-10毫欧,所述次级绕组包括次级磁环以及绕制所述次级磁环500-1000圈的漆包线,所述漆包线的直径为0.1mm。The multifunctional mutual inductance type power window anti-pinch controller according to any one of claims 1 to 4, wherein the primary winding includes a primary magnetic ring and constantan for winding the primary magnetic ring 1-2 turns The constantan wire has a diameter of 1.5mm and a resistance value of 5-10 milliohms, the secondary winding includes a secondary magnetic ring and an enameled wire wound around the secondary magnetic ring 500-1000 times, the The diameter of the enameled wire is 0.1mm.
- 根据权利要求2至4任一所述的多功能互感式电动车窗防夹控制器,其特征在于:还包括稳压电路,所述稳压电路包括三端电源稳压芯片U3、二极管D1、电容C7和电容C8;The multifunctional mutual inductance type electric window anti-pinch controller according to any one of claims 2 to 4, characterized in that it further comprises a voltage stabilizing circuit, and the voltage stabilizing circuit includes a three-terminal power supply voltage stabilizing chip U3, a diode D1, and a voltage stabilizing circuit. Capacitor C7 and capacitor C8;所述二极管D1的阳极接入输入电压信号且阴极同时与所述三端电源稳压芯片U3的第一脚、所述电容C7的一端电连接,所述三端电源稳压芯片U3的第三脚同时与所述主控芯片U1的第一脚、所述运算放大器U2的第八脚、所述斯密特触发器U5的第十四脚以及所述电容C8的一端电连接,所述三端电源稳压芯片U3的第二脚、所述电容C7的另一端以及所述电容C8的另一端接地。The anode of the diode D1 is connected to the input voltage signal and the cathode is simultaneously electrically connected to the first pin of the three-terminal power supply regulator chip U3 and one end of the capacitor C7, and the third terminal of the three-terminal power supply regulator chip U3 The pin is electrically connected to the first pin of the main control chip U1, the eighth pin of the operational amplifier U2, the fourteenth pin of the Schmitt trigger U5, and one end of the capacitor C8 at the same time. The second pin of the terminal power supply regulator chip U3, the other end of the capacitor C7 and the other end of the capacitor C8 are grounded.
- 根据权利要求6所述的多功能互感式电动车窗防夹控制器,其特征在于:所述输入电压信号为12V,所述三端电源稳压芯片U3的第三脚的输出电压信号为5V。The multifunctional mutual inductance type electric window anti-pinch controller according to claim 6, wherein the input voltage signal is 12V, and the output voltage signal of the third pin of the three-terminal power supply regulator chip U3 is 5V .
- 一种互感式电动车窗防夹控制方法,其特征在于,包括步骤:A mutual inductance type electric window anti-pinch control method is characterized in that it comprises the following steps:S1、采集车窗电机M的BEM纹波信号;S1. Collect the BEM ripple signal of the window motor M;S2、判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行。S2. Determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if so, generate an anti-pinch control signal to control the operation of the window motor M.
- 根据权利要求8所述的互感式电动车窗防夹控制方法,其特征在于,所述步骤S2具体包括以下步骤:The mutual inductance type power window anti-pinch control method according to claim 8, wherein the step S2 specifically includes the following steps:判断所述车窗电机M启动后的时间是否到达预设延时时长,若是,则判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M运行,所述预设延时时长为40ms-60ms之间。It is judged whether the time after the start of the window motor M reaches the preset delay time, if it is, it is judged whether the pulse width deformation of the BEM ripple signal is greater than the preset threshold, and if it is, an anti-pinch control signal is generated to control The window motor M runs, and the preset delay time is between 40ms-60ms.
- 根据权利要求8所述的互感式电动车窗防夹控制方法,其特征在于,所述步骤S2具体包括以下步骤:The mutual inductance type power window anti-pinch control method according to claim 8, wherein the step S2 specifically includes the following steps:读取车窗当前位置和按键输入信号,若所述按键输入信号为车窗升降信号,则输出开关信号来驱动车窗电机M进行上下升降运动,若所述车窗升降信号为车窗上升信号,则对所述BEM脉冲信号进行加计数,以得到车窗实时位置,若所述车窗升降信号为车窗下降信号,则对所述BEM脉冲信号进行减计数,以得到车窗实时位置,所述BEM脉冲信号为斯密特触发器U5转换所述BEM纹波信号后所得到的数字脉冲信号;Read the current position of the car window and the key input signal. If the key input signal is a window lift signal, output a switch signal to drive the window motor M to move up and down. If the window lift signal is a window lift signal , The BEM pulse signal is counted up to obtain the real-time position of the car window, if the window lift signal is a window down signal, the BEM pulse signal is counted down to obtain the real-time position of the car window, The BEM pulse signal is a digital pulse signal obtained after the Schmitt trigger U5 converts the BEM ripple signal;判断所述车窗实时位置是否处于防夹区域,若是,则判断所述BEM纹波信号的脉宽形变是否大于预设阈值,若是,则生成防夹控制信号,以控制车窗电机M反转,所述防夹区域在车窗上升最低值和车窗上升最高值之间,所述车窗上升最低值的取值范围为车窗从底端上升30mm至80mm之间,所述车窗上升最高值的取值范围为车窗上升到离顶端3mm至5mm之间。Determine whether the real-time position of the car window is in the anti-pinch area, if so, determine whether the pulse width deformation of the BEM ripple signal is greater than a preset threshold, and if so, generate an anti-pinch control signal to control the reverse rotation of the window motor M , The anti-pinch area is between the minimum value of the window rise and the maximum value of the window rise, and the range of the minimum value of the window rise is between 30mm and 80mm when the window rises from the bottom end, and the window rises The highest value ranges from 3mm to 5mm from the top of the car window.
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CN117878839A (en) * | 2023-12-29 | 2024-04-12 | 浙江康信电器集团有限公司 | Automobile glass lifting switch circuit with locked rotor protection and control method thereof |
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