System for improving relay sound when window glass ascends and descends to bottom, control method and automobile

Abstract

The invention provides a system for improving relay sound when car window glass ascends and descends to the bottom, a control method and a car, and belongs to the technical field of car window glass ascending and descending control. The system comprises a car window glass ascending and descending switch, a control module, a relay, a current sampling module and a car window glass lifter; a user outputs a vehicle window glass lifting signal to the control module through the vehicle window glass lifting switch, the control module controls the relay to be closed, the vehicle window glass lifter starts to work, the current collection module outputs collected information of current of a motor in the vehicle window glass lifter to the control module, and when vehicle window glass ascends to the top or descends to the bottom, the vehicle window glass lifter starts to work. And when the motor in the window glass lifter is locked, the control module receives the locked-rotor information of the motor, and the control module controls the relay to be switched off. The relay is switched off immediately when the window glass ascends to the top or descends to the bottom, generated noise is reduced, and user experience is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile window glass lifting control, and in particular to a system, a control method and an automobile for improving the sound of a relay when the window glass is fully lifted. Background Art

[0002] Automotive relays are mainly composed of an electromagnetic system (iron core, coil, etc.) and a contact system (moving contact, static contact, etc.). When the coil is energized, a magnetic field is generated, attracting the iron core to move, which in turn drives the contacts to close or open, thereby achieving on-off control of the circuit. In this process, the mechanical parts inside the relay will produce a certain amount of sound (the sound produced by the friction and collision between the iron core and the surrounding structure during movement, etc.), which is a normal working phenomenon for the relay, but the "clicking" sound emitted by the disconnection of the relay affects the user's car experience.

[0003] Chinese Patent No. 103786667A discloses a window opening automatic control system, which is used to automatically adjust the window opening when the car is driving with the window open to achieve control of wind noise. The control system includes a rainfall detection unit, a vehicle speed detection unit, a window opening detection unit, a window controller, a window lifting and lowering execution unit, and a window; the rainfall detection unit is used to detect rainfall information outside the car; the vehicle speed detection unit is used to detect vehicle speed information of the car; the window opening detection unit is used to detect current window opening information; the window controller is used to receive rainfall information, vehicle speed information and current window opening information, and derive a target window opening when controlling wind noise according to the rainfall information and vehicle speed information, and output window lifting and lowering control information to the window lifting and lowering execution unit after comparing the target window opening with the current window opening information; the window lifting and lowering execution unit automatically lifts and lowers the window according to the window lifting and lowering control information, so that the window is lifted and lowered to the target window opening.

[0004] The prior art does not consider the disturbance caused by the sound of the relay disconnection to the user, which will affect the user experience. Summary of the invention

[0005] The present invention aims to provide a system, a control method and a car for improving the sound of a relay when the car window glass is fully raised or lowered, so as to achieve the technical purpose of synchronizing the sound of the relay disconnecting with the sound of the motor controlling the glass lifter, thereby improving the user's sensory experience.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a system for improving the sound of a relay when a vehicle window glass is fully raised or lowered. The system comprises a vehicle window glass lifting switch, a control module, a relay, a current sampling module and a vehicle window glass lifter. The output end of the vehicle window glass lifting switch is connected to the input end of the control module, the output end of the control module is connected to the input end of the relay, the output end of the relay is connected to the input end of the vehicle window glass lifter, the output end of the vehicle window glass lifter is connected to the input end of the current sampling module, and the output end of the current sampling module is connected to the input end of the control module.

[0008] The window glass lift switch outputs a window glass lift signal to the control module, the control module outputs a relay closing instruction to the relay, and the current sampling module collects current information of the window glass lifter to the control module.

[0009] The control module adopts a microcontroller.

[0010] The relay includes a first relay and a second relay.

[0011] The output end of the control module is connected to the input end of the vehicle window glass lifter through a first relay, and the output end of the control module is connected to the input end of the vehicle window glass lifter through a second relay.

[0012] The current sampling module adopts a current sampling circuit.

[0013] The output end of the vehicle window glass lifter is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the control module.

[0014] The present invention provides a control method for a system that improves the sound of a relay when a vehicle window glass is fully raised or lowered, and the method is characterized in that:

[0015] Step 1: The user outputs a window glass lifting signal to the control module through the window glass lifting switch;

[0016] Step 2: The control module controls the relay to close, and the window lifter starts to work;

[0017] Step 3: The current acquisition module outputs the collected information of the current of the motor in the window glass lifter to the control module. When the window glass rises to the top or falls to the bottom, the motor in the window glass lifter is blocked. At this time, the control module receives the information that the motor is blocked, and the control module controls the relay to disconnect.

[0018] The invention provides a car, comprising a system for improving the sound of a relay when the car window glass is fully raised or lowered and a control method thereof.

[0019] The technical effects of the present invention are:

[0020] (1) The present invention immediately disconnects the relay when the vehicle window glass rises to the top or falls to the bottom. The disconnection sound of the relay is synchronized with the working sound of the vehicle window glass lifter, thereby reducing the noise generated and preventing the disconnection sound of the relay from being mistaken for an abnormal fault sound, thereby improving the user experience.

[0021] (2) The present invention controls the lifting and lowering of the vehicle window glass through two relays, and the control structure is simple and effective with a low failure rate.

[0022] (3) The present invention determines whether the vehicle window glass is raised to the top or lowered to the bottom through a current sampling circuit, and disconnects the circuit when the vehicle window glass is raised to the top or lowered to the bottom, thereby protecting the safety of the vehicle.

[0023] (4) The present invention tests the locked-rotor current of the motor of the window glass lifter to determine the specific range of the locked-rotor current of the motor of the window glass lifter, thereby improving the control accuracy of the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] This specification includes the following drawings, which show the following contents:

[0025] Figure 1 A system, a control method and a logic structure block diagram of a vehicle for improving the sound of a relay when the vehicle window glass is fully raised or lowered according to the present invention;

[0026] Figure 2 The present invention provides a system, a control method and a current sampling circuit for a vehicle to improve the sound of a relay when the vehicle window glass is fully raised or lowered.

[0027] Figure 1 The markings are: 1. Window glass lift switch; 2. Control module; 3. Relay; 4. Current sampling module; 5. Window glass lifter. DETAILED DESCRIPTION

[0028] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0029] The present invention provides a system for improving the sound of a relay when a vehicle window glass is fully raised or lowered, comprising a vehicle window glass lifting switch 1, a control module 2, a relay 3, a current sampling module 4 and a vehicle window glass lifter 5, wherein the output end of the vehicle window glass lifting switch 1 is connected to the input end of the control module 2, the output end of the control module 2 is connected to the input end of the relay 3, the output end of the relay 3 is connected to the input end of the vehicle window glass lifter, the output end of the vehicle window glass lifter is connected to the input end of the current sampling module 4, and the output end of the current sampling module 4 is connected to the input end of the control module 2.

[0030] The window glass lift switch 1 outputs a window glass lift signal to the control module 2 , the control module 2 outputs a relay 3 closing instruction to the relay 3 , and the current sampling module 4 collects current information of the window glass lifter to the control module 2 .

[0031] The control module 2 adopts a microcontroller.

[0032] The relay 3 includes a first relay and a second relay.

[0033] The output end of the control module 2 is connected to the input end of the vehicle window glass lifter through a first relay, and the output end of the control module 2 is connected to the input end of the vehicle window glass lifter through a second relay.

[0034] The current sampling module 4 adopts a current sampling circuit.

[0035] The output end of the window glass lifter is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the control module 2 .

[0036] The present invention provides a control method for a system for improving the sound of a relay when a vehicle window glass is fully raised or lowered, the method comprising:

[0037] Step 1: The user outputs a window glass lifting signal to the control module 2 through the window glass lifting switch 1;

[0038] Step 2: The control module 2 controls the relay 3 to close, and the window glass lifter starts to work;

[0039] Step 3: The current acquisition module outputs the collected information of the current of the motor in the window glass lifter to the control module 2. When the window glass rises to the top or falls to the bottom, the motor in the window glass lifter is blocked. At this time, the control module 2 receives the information that the motor is blocked, and the control module 2 controls the relay 3 to disconnect.

[0040] The invention provides a car, comprising a system for improving the sound of a relay when the car window glass is fully raised or lowered and a control method thereof.

[0041] The following is a detailed description of a system, a control method and a vehicle of the present invention for improving the sound of a relay when the vehicle window glass is fully raised or lowered.

[0042] The present invention discloses a system for improving the relay sound when a vehicle window glass is fully raised or lowered, comprising a vehicle window glass lift switch 1, a control module 2, a relay 3, a current sampling module 4 and a vehicle window glass lifter. The vehicle window glass lift switch 1 is used to send a control signal for raising or lowering the vehicle window glass to the control module 2. The vehicle window glass lift switch 1 adopts an electronic vehicle window glass lift switch 1. In new energy vehicles, a touch-type vehicle window glass lift switch 1 is gradually becoming popular.

[0043] The control module 2 uses a microcontroller, which is used to control the closing of the relay 3 to control the window glass lifter to start working after receiving the window glass lifting or lowering control signal sent by the window glass lifting switch 1. According to the control signal, the window glass lifter controls the window glass to rise or fall. The model of the microcontroller in the embodiment of the present invention is MCUZ20K144MCMHLT.

[0044] After receiving the control signal input by the control module 2, the relay 3 is closed, and the window glass lifter works. There are two relays 3 in the present invention, namely the first relay and the second relay. The first relay is used to control the rise of the window glass, and the second relay is used to control the fall of the window glass. The relay 3 can be selected as a normally open relay or a normally closed relay. The two types of relays 3 have different control strategies. The normally open relay is normally open when not powered and closed when powered; the normally closed relay is closed when not powered and disconnected when powered. The present invention uses two relays to control the lifting of the window glass, and the control structure is simple and effective, with a low failure rate.

[0045] The current sampling module 4 uses a current sampling circuit to collect the current of the motor in the window glass lifter. The control module 2 collects the current of the motor in the window glass lifter through the current sampling circuit. When the current is too large, the motor is in a stalled state, and the control module 2 controls the relay 3 to disconnect. The present invention determines whether the window glass is raised to the top or lowered to the bottom through the current sampling circuit, and disconnects the circuit when the window glass is raised to the top or lowered to the bottom, thereby protecting the safety of the car.

[0046] The window lifter is used to control the lifting and lowering of the window glass. Specifically, the motor in the window lifter drives the window glass to move up and down along the guide rail through a transmission mechanism (such as a gear set or a worm gear) to achieve the raising or lowering of the window.

[0047] The specific connection relationships of the present invention are described in detail below.

[0048] The output end of the window glass lift switch 1 is connected to the input end of the microcontroller through the vehicle bus, the output end of the microcontroller is connected to the relay 3, the relay 3 is connected to the input end of the window glass lifter, the output end of the window glass lifter is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the microcontroller.

[0049] The detailed circuit structure of the current sampling circuit is:

[0050] The first input terminal WIN_LF_UP_AN is connected to the inverting input terminal of the operational amplifier A through a resistor R414, the second input terminal WIN_LF_DOWN_AN is connected to the non-inverting input terminal of the operational amplifier A through a resistor R418, the power input terminal VREF is connected to the non-inverting input terminal of the operational amplifier A through a resistor R420, the power input terminal VREF is connected to the non-inverting input terminal of the operational amplifier A through a capacitor C380, the middle node of the resistor R414 and the operational amplifier A is connected to the output terminal of the operational amplifier A through a capacitor C373, the middle node of the resistor R414 and the operational amplifier A is connected to the output terminal of the operational amplifier A through a resistor R412, one end of the operational amplifier A is connected to the power input terminal V OP, and one end is grounded; the output terminal of the operational amplifier A is connected to the first output terminal WIN_LF_DC_AN, the output terminal of the operational amplifier A is connected to the second output terminal WIN_LF_DIAG_AN through a resistor R416, and the second output terminal WIN_LF_DIAG_AN is grounded through a capacitor C378. The resistance values ​​of the resistor R414 and the resistor R418 are 4.7 kΩ, the resistance values ​​of the resistor R420, the resistor R412, and the resistor R416 are 33 kΩ, the capacitance values ​​of the capacitor C380 and the capacitor C373 are 100 pF, and the capacitance value of the capacitor C378 is 100 nF.

[0051] The following describes in detail a control method for a system for improving the sound of a relay when a vehicle window glass is fully raised or lowered according to the present invention in conjunction with an embodiment.

[0052] The user outputs the window glass lifting signal to the control module 2 through the window glass lifting switch 1. After receiving the window glass lifting signal, the control module 2 controls the relay 3 to close. Specifically, the relay 3 adopts a normally open relay. When it is not powered on, the relay 3 is in an open state, and the window glass lifter does not work. When the control module 2 outputs a high level, the relay 3 is powered on, and the window glass lifter works. There are two relays 3 in the present invention, namely the first relay and the second relay. The first relay is used to control the motor in the window glass lifter to rotate forward to realize the lifting of the window glass, and the second relay is used to control the motor in the window glass lifter to rotate reversely to realize the lowering of the window glass.

[0053] When the first relay is closed, the motor in the window lifter rotates forward, and the window lifter controls the window glass to rise; when the second relay is closed, the motor in the window lifter rotates reversely, and the window lifter controls the window glass to fall.

[0054] The current acquisition module outputs the acquired information of the current of the motor in the window glass lifter to the control module 2. When the window glass rises to the top or falls to the bottom, the motor in the window glass lifter is blocked. At this time, after the control module 2 receives the information of the motor blocking, the control module 2 controls the relay 3 to disconnect. Specifically, when the window glass rises to the top, the control module 2 controls the first relay to disconnect, and when the window glass falls to the bottom, the control module 2 controls the second relay to disconnect.

[0055] The present invention can determine the range of the stall current by limiting the motor of the window glass lifter. After determining the stall current of the motor of the window glass lifter, the developer writes it into the control module 2. In the embodiment of the present invention, the working current of the motor of the window glass lifter is 10A. When the working current of the window glass lifter exceeds 30A, the motor of the window glass lifter is in a stall state.

[0056] The effects of the present invention are described below in conjunction with embodiments.

[0057] The present invention immediately disconnects the relay 3 when the vehicle window glass rises to the top or falls to the bottom. The disconnection sound of the relay 3 is synchronized with the working sound of the vehicle window glass lifter, which reduces the noise generated and avoids the disconnection sound of the relay 3 being mistaken for a fault sound, thereby improving the user experience.

[0058] The present invention determines whether the window glass is raised to the top or lowered to the bottom by real-time acquisition of the current of the window glass lifter. When the window glass is raised to the top or lowered to the bottom, the control module 2 controls the relay 3 to be disconnected, thereby protecting the safety of the car.

[0059] The present invention tests the locked-rotor current of the motor of the vehicle window glass lifter, determines the specific range of the locked-rotor current of the motor of the vehicle window glass lifter, and improves the control accuracy of the control module 2.

[0060] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A system for improving the sound of a relay when a car window glass is fully raised or lowered, characterized in that: The invention comprises a window glass lifting switch, a control module, a relay, a current sampling module and a window glass lifter, wherein the output end of the window glass lifting switch is connected to the input end of the control module, the output end of the control module is connected to the input end of the relay, the output end of the relay is connected to the input end of the window glass lifter, the output end of the window glass lifter is connected to the input end of the current sampling module, and the output end of the current sampling module is connected to the input end of the control module.

2. A system for improving the sound of a relay when the window glass is fully raised or lowered as claimed in claim 1, characterized in that: The window glass lift switch outputs a window glass lift signal to the control module, the control module outputs a relay closing instruction to the relay, and the current sampling module collects current information of the window glass lifter to the control module.

3. A system for improving the sound of a relay when the window glass is fully raised or lowered as claimed in claim 1, characterized in that: The control module adopts a microcontroller.

4. A system for improving the sound of a relay when the window glass is fully raised or lowered as claimed in claim 1, characterized in that: The relay includes a first relay and a second relay.

5. A system for improving the sound of a relay when the window glass is fully raised or lowered as claimed in claim 1 or 4, characterized in that: The output end of the control module is connected to the input end of the vehicle window glass lifter through a first relay, and the output end of the control module is connected to the input end of the vehicle window glass lifter through a second relay.

6. A system for improving the sound of a relay when the window glass is fully raised or lowered as claimed in claim 1, characterized in that: The current sampling module adopts a current sampling circuit.

7. A system for improving the sound of a relay when a vehicle window glass is fully raised or lowered as claimed in claim 1 or 6, characterized in that: The output end of the vehicle window glass lifter is connected to the input end of the current sampling circuit, and the output end of the current sampling circuit is connected to the input end of the control module.

8. A control method for a system for improving the sound of a relay when a vehicle window glass is fully raised or lowered as claimed in any one of claims 1 to 7, characterized in that: Step 1: The user outputs a window glass lifting signal to the control module through the window glass lifting switch; Step 2: The control module controls the relay to close, and the window lifter starts to work; Step 3: The current acquisition module outputs the collected information of the current of the motor in the window glass lifter to the control module. When the window glass rises to the top or falls to the bottom, the motor in the window glass lifter is blocked. At this time, the control module receives the information that the motor is blocked, and the control module controls the relay to disconnect.

9. A car, characterized in that: It comprises a system and a control method thereof for improving the sound of a relay when a vehicle window glass is fully raised or lowered as described in any one of claims 1 to 8.

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