Electric control supporting leg balancing system for travel trailer

Abstract

The invention discloses an electric control landing leg balancing system for a trailer, which consists of an automatic balancing system main control board, an acceleration sensor data acquisition board, a remote controller, landing leg lead screw motors and mechanical landing legs, wherein the landing leg lead screw motors are arranged at four corners of the bottom surface of the trailer; the automatic balancing system main control board is placed on the bottom plane of the motor home in a rigid connection mode. A traditional hand-cranking supporting leg is changed into the electric control supporting legs, when the touring car is separated from a front car and needs to be parked, the four electric control supporting legs at the four corners of the plane of the bottom of the touring car stretch out, and it is guaranteed that the touring car lands safely and reliably; meanwhile, an acceleration sensor is carried, vehicle body posture information can be detected in real time, when a vehicle body inclines, the electrically-controlled supporting legs act to level the bottom plane of the vehicle body, and the comfortable experience of a user is guaranteed; in addition, lifting and descending of the motor home can be controlled only through keys, and compared with a traditional hand-operated supporting leg, more time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of trailer caravans, and in particular to an electric-controlled outrigger balancing system for trailer caravans. Background Art

[0002] The RVs currently sold on the market are equipped with manual outrigger devices at the four corners of the RV chassis. Users turn the rocker to make the outriggers touch the ground to park the RV stably and reliably. When the RV needs to be moved, the user needs to turn the rocker again to make the four outriggers leave the ground. When the user has little experience or is physically disabled and finds it difficult to prop up the entire RV with the manual rocker, it will be difficult for the user to rest safely and stably inside the RV. The manual outrigger system is time-consuming and laborious, and it is difficult to meet the user's needs for convenience and speed. Based on this, we propose an electronically controlled outrigger balancing system for trailer RVs. Summary of the invention

[0003] The object of the present invention is to provide an electronically controlled outrigger balancing system for a trailer caravan to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric-controlled outrigger balancing system for a trailer RV, comprising an automatic balancing system main control board, an acceleration sensor data acquisition board, a remote control, outrigger lead screw motors installed at the four corners of the bottom surface of the RV, and mechanical outriggers; the automatic balancing system main control board is placed on the bottom plane of the RV in a rigid connection manner; the automatic balancing system main control board comprises a main control chip, a voltage detection circuit, a 12V to 5V power supply circuit, a 5V to 3.3V power supply circuit, a four-way H-bridge drive circuit, a current detection circuit, a buzzer circuit, an indicator light circuit, and a wireless decoding circuit; the voltage detection circuit The 12V to 5V power supply circuit is connected to the same 12V battery, the 12V to 5V power supply circuit is connected to the 5V to 3.3V power supply circuit, the 5V to 3.3V power supply circuit is connected to the main control chip, the main control chip is electrically connected to the buzzer circuit and the indicator light circuit, the main control chip and the remote control are connected through a wireless decoding circuit, the four H-bridge drive circuits are all electrically connected to the main control chip, and the four H-bridge drive circuits are respectively electrically connected to the control ends of the corresponding leg screw motors, the input end of the current detection circuit is electrically connected to the current detection end of the leg screw motor, and the current detection circuit sends the detected data to the main control chip.

[0005] Preferably, the model of the main control chip is STM32F103RCT6, and its operating frequency is 72MHz, which can meet the computing power requirements of the automatic balancing system. The Flash capacity of the main control chip is 256K, which can meet the software storage requirements.

[0006] Preferably, the voltage detection circuit is composed of a voltage-dividing resistor and an analog-to-digital conversion module. The voltage detection circuit reduces the input power supply voltage by 10 times and inputs it into the ADC pin of the main control chip. The main control chip obtains the current input power supply voltage value through calculation.

[0007] Preferably, the 12V to 5V power supply circuit converts the 12V voltage into 5V, and provides 5V voltage to the automatic balancing system main control board for power supply, and the 5V to 3.3V power supply circuit converts the 5V voltage into 3.3V, and provides 3.3V voltage to the automatic balancing system main control board for power supply.

[0008] Preferably, a four-way H-bridge drive circuit is used to control the four leg screw motors located at the four corners of the bottom of the RV. A single H-bridge drive circuit is composed of four NCE6050KA model MOS tubes and an H-bridge driver chip. The maximum withstand voltage of the MOS tube is 60V, and the maximum flow rate is 50A, which can meet the voltage and current requirements of the screw motor. The H-bridge driver chip can drive the two MOS tubes under the same bridge arm of the H-bridge. The H-bridge driver chip has its own logic locking function, which can prevent the upper and lower tubes from passing directly, effectively reducing the risk of MOS tube explosion. The main control chip outputs PWM to control the opening and closing of the H-bridge, thereby controlling the speed of the screw motor.

[0009] Preferably, the current detection circuit is composed of a 10Ω sampling resistor and an operational amplifier LM358. The current detection circuit generates a voltage drop through the sampling resistor. The sampled voltage is amplified 20 times by a differential amplifier circuit composed of the operational amplifier LM358 and input into the ADC pin of the main control chip. The main control chip calculates the current value for logical judgment.

[0010] Preferably, the buzzer circuit is composed of a 12V passive buzzer and its driving circuit. The internal timer of the main control chip outputs a 2KHz waveform to control the driving circuit of the buzzer to ensure that the buzzer has maximum loudness. The indicator light circuit is composed of red, green and yellow three-color indicator lights for alarm and status indication.

[0011] Preferably, the wireless decoding circuit is composed of a SYN480R wireless decoding chip and its peripheral circuits. The wireless decoding chip can decode a 433M carrier signal, obtain the data sent by the remote control and transmit it to the main control chip. The main control chip performs corresponding operations according to the received data.

[0012] Preferably, the acceleration sensor data acquisition board is composed of an SC7A20TR model acceleration sensor and its peripheral circuits. The acceleration sensor can sample XYZ three-axis acceleration. The acceleration sensor is connected to the main control chip through an IIC communication bus. The communication rate between the two is 400KHz, so that the main control chip can obtain the RV posture in real time.

[0013] Compared with the prior art, the present invention transforms the traditional hand-cranked outriggers into electric-controlled outriggers. When the RV is separated from the vehicle in front and needs to be parked, the four electric-controlled outriggers at the four corners of the bottom plane of the RV can be extended to ensure the safe and reliable landing of the RV. At the same time, it is equipped with an acceleration sensor, which can detect the body posture information in real time. When the body is tilted, the electric-controlled outriggers will move to level the bottom plane of the body to ensure the user's comfortable experience. In addition, the lifting and lowering of the RV can be controlled by buttons, which saves time and effort compared to traditional hand-cranked outriggers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a connection block diagram of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1As shown, the electric control outrigger balancing system for a trailer RV proposed in this embodiment is composed of an automatic balancing system main control board, an acceleration sensor data acquisition board, a remote control, outrigger lead screw motors installed at the four corners of the bottom surface of the RV and mechanical outriggers. The automatic balancing system main control board is placed on the bottom plane of the RV in a rigid connection manner. The automatic balancing system main control board is composed of a main control chip, a voltage detection circuit, a 12V to 5V power supply circuit, a 5V to 3.3V power supply circuit, a four-way H-bridge drive circuit, a current detection circuit, a buzzer circuit, an indicator light circuit and a wireless decoding circuit. The main control chip model is STM32F103RCT6, which runs at 72MHz and can meet the computing power requirements of the automatic balancing system. The Flash capacity of the main control chip is 256K, which can meet the software storage requirements. The 12V to 5V power supply circuit converts the 12V voltage into 5V and provides 5V voltage to the main control board of the automatic balancing system for power supply. The 5V to 3.3V power supply circuit converts the 5V voltage into 3.3V and provides 3.3V voltage to the main control board of the automatic balancing system for power supply. The voltage detection circuit and the 12V The 5V to 5V power supply circuit is connected to the same 12V battery, the 12V to 5V power supply circuit is connected to the 5V to 3.3V power supply circuit, the 5V to 3.3V power supply circuit is connected to the main control chip, the main control chip is electrically connected to the buzzer circuit and the indicator light circuit, the main control chip and the remote control are connected through a wireless decoding circuit, the four H-bridge drive circuits are all electrically connected to the main control chip, and the four H-bridge drive circuits are respectively electrically connected to the control ends of the corresponding leg screw motors, the input end of the current detection circuit is electrically connected to the current detection end of the leg screw motor, The current detection circuit sends the detected data to the main control chip. The present invention transforms the traditional hand-cranked outriggers into electric-controlled outriggers. When the RV is separated from the vehicle in front and needs to be parked, the four electric-controlled outriggers at the four corners of the bottom plane of the RV can be extended to ensure the safe and reliable landing of the RV. At the same time, it is equipped with an acceleration sensor, which can detect the body posture information in real time. When the body is tilted, the electric-controlled outriggers will move to level the bottom plane of the body to ensure the user's comfortable experience. In addition, the lifting and lowering of the RV can be controlled by buttons, which saves time and effort compared to traditional hand-cranked outriggers.

[0017] Specifically, the voltage detection circuit is composed of a voltage-dividing resistor and an analog-to-digital conversion module. The voltage detection circuit reduces the input power supply voltage by 10 times and inputs it into the ADC pin of the main control chip. The main control chip calculates the current input power supply voltage value. The four-way H-bridge drive circuit is used to control the four leg screw motors located at the four corners of the bottom of the RV. A single H-bridge drive circuit is composed of four NCE6050KA MOS tubes and an H-bridge drive chip. The maximum withstand voltage of the MOS tube is 60V and the maximum flow rate is 50A, which can meet the voltage and current requirements of the screw motor. The H-bridge drive chip can drive The two MOS tubes under the same bridge arm of the H-bridge, the H-bridge driver chip has a built-in logic locking function, which can prevent the upper and lower tubes from being directly connected, effectively reducing the risk of MOS tube explosion. The main control chip outputs PWM to control the opening and closing of the H-bridge, thereby controlling the speed of the screw motor. The current detection circuit is composed of a 10Ω sampling resistor and an operational amplifier LM358. The current detection circuit generates a voltage drop through the sampling resistor. The sampled voltage is amplified 20 times by the differential amplifier circuit composed of the operational amplifier LM358 and input into the ADC pin of the main control chip. The main control chip calculates the current value for logical judgment.

[0018] Furthermore, the buzzer circuit is composed of a 12V passive buzzer and its driving circuit. The internal timer of the main control chip outputs a 2KHz waveform to control the driving circuit of the buzzer to ensure that the buzzer has the maximum loudness. The indicator light circuit is composed of red, green and yellow three-color indicator lights, which are used for alarm and status indication. The wireless decoding circuit is composed of a SYN480R wireless decoding chip and its peripheral circuits. The wireless decoding chip can decode the 433M carrier signal, obtain the data sent by the remote control and transmit it to the main control chip. The main control chip performs corresponding operations according to the received data. The acceleration sensor data acquisition board is composed of an SC7A20TR model acceleration sensor and its peripheral circuits. The acceleration sensor can sample XYZ three-axis acceleration. The acceleration sensor is connected to the main control chip through the IIC communication bus. The communication rate of the two is 400KHz, so that the main control chip can obtain the RV posture in real time.

[0019] The method of using this embodiment is as follows: the voltage detection circuit reduces the input power supply voltage by 10 times and then inputs it into the ADC pin of the main control chip. The main control chip obtains the current input power supply voltage value through calculation. The current detection circuit generates a voltage drop through the sampling resistor. The sampled voltage is amplified by 20 times through the differential amplifier circuit composed of the operational amplifier LM358 and then input into the ADC pin of the main control chip. The main control chip obtains the current value through calculation for logic judgment. The main control chip outputs PWM to control the opening and closing of the H bridge, thereby controlling the four leg screw motors. At the same time, the main control chip can also communicate wirelessly with the remote control, so that the mechanical legs at the bottom of the RV can be operated accordingly. Compared with the traditional hand-cranked legs, it is more time-saving and labor-saving. In addition, the acceleration sensor can sample the XYZ three-axis acceleration. The acceleration sensor is connected to the main control chip through the IIC communication bus, so that the main control chip can obtain the RV posture in real time and adjust the mechanical legs in real time according to the obtained RV posture.

[0020] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric control outrigger balancing system for trailer RVs, comprising an automatic balancing system main control board, an acceleration sensor data acquisition board, a remote controller, outrigger lead screw motors installed at the four corners of the bottom surface of the RV, and mechanical outriggers. The automatic balancing system main control board is placed on the bottom plane of the RV in a rigid connection manner, and is characterized in that: The main control board of the automatic balancing system is composed of a main control chip, a voltage detection circuit, a 12V to 5V power supply circuit, a 5V to 3.3V power supply circuit, a four-way H-bridge drive circuit, a current detection circuit, a buzzer circuit, an indicator light circuit and a wireless decoding circuit. The voltage detection circuit and the 12V to 5V power supply circuit are connected to the same 12V battery, the 12V to 5V power supply circuit is connected to the 5V to 3.3V power supply circuit, the 5V to 3.3V power supply circuit is connected to the main control chip, the main control chip is electrically connected to the buzzer circuit and the indicator light circuit, the main control chip and the remote control are connected through a wireless decoding circuit, the four-way H-bridge drive circuits are all electrically connected to the main control chip, and the four-way H-bridge drive circuits are respectively electrically connected to the control ends of the corresponding leg screw motors, the input end of the current detection circuit is electrically connected to the current detection end of the leg screw motor, and the current detection circuit sends the detected data to the main control chip.

2. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The model of the main control chip is STM32F103RCT6, the operating frequency is 72MHz, and the Flash capacity of the main control chip is 256K.

3. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The voltage detection circuit is composed of a voltage-dividing resistor and an analog-to-digital conversion module. The voltage detection circuit reduces the input power supply voltage by 10 times and then inputs it into the ADC pin of the main control chip. The main control chip obtains the current input power supply voltage value through calculation.

4. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The 12V to 5V power supply circuit converts the 12V voltage into 5V and provides 5V voltage to the automatic balancing system main control board for power supply. The 5V to 3.3V power supply circuit converts the 5V voltage into 3.3V and provides 3.3V voltage to the automatic balancing system main control board for power supply.

5. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The four-way H-bridge drive circuit is used to control the four leg screw motors located at the four corners of the bottom of the RV. A single H-bridge drive circuit consists of four NCE6050KA MOS tubes and an H-bridge drive chip. The main control chip outputs PWM to control the opening and closing of the H-bridge, thereby controlling the speed of the screw motor.

6. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The current detection circuit is composed of a 10Ω sampling resistor and an operational amplifier LM358. The current detection circuit generates a voltage drop through the sampling resistor. The sampled voltage is amplified 20 times by a differential amplifier circuit composed of the operational amplifier LM358 and input into the ADC pin of the main control chip. The main control chip obtains the current value through calculation.

7. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The buzzer circuit is composed of a 12V passive buzzer and its driving circuit. The internal timer of the main control chip outputs a 2KHz waveform to control the driving circuit of the buzzer to ensure that the buzzer has the maximum loudness. The indicator light circuit is composed of red, green and yellow three-color indicator lights for alarm and status indication.

8. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The wireless decoding circuit is composed of a SYN480R wireless decoding chip and its peripheral circuits. The wireless decoding chip can decode a 433M carrier signal, obtain the data sent by the remote control and transmit it to the main control chip. The main control chip performs corresponding operations according to the received data.

9. The electronically controlled outrigger balancing system for a trailer caravan according to claim 1, characterized in that: The acceleration sensor data acquisition board is composed of an acceleration sensor of the SC7A20TR model and its peripheral circuits. The acceleration sensor can sample XYZ three-axis acceleration. The acceleration sensor is connected to the main control chip through an IIC communication bus.

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