CN211375379U - Full-automatic one-key type vehicle control erecting system - Google Patents

Abstract

The utility model relates to a full-automatic one-key type vehicle control erecting system, which comprises a control part, a detection part and a display control part; the control part comprises a core control module, a control panel, a power supply, a proportional valve driver and a proportional valve; the detection part comprises a vertical angle sensor, a pressure sensor, a protection circuit and an alarm circuit; the display and control part comprises an LED display screen. The utility model discloses when the vehicle carries out relevant leveling and measures, no matter what environment is in to the vehicle, no matter what state is in at present to the system, as long as each part does not report the trouble, each supporting leg state of system automated inspection reads level sensor's positional information, transfers the system to the horizontality according to the fastest speed.

Description

Full-automatic one-key type vehicle control erecting system

Technical Field

The utility model belongs to the technical field of automatic control, concretely relates to full-automatic one-key formula car accuse erects system.

Background

The wheel centers of four tires of a whole vehicle are frequently leveled in the early stage of the vehicle, parameter measurement and calibration are carried out, and subsequent operations such as erecting and the like are carried out. However, in the prior art, the vehicle often needs to be placed in a special leveling environment for relevant measurement, and the accuracy of the leveling result cannot be guaranteed, so that the wheel centers of four tires are not on the same horizontal line, and then the subsequent erecting process is directly influenced.

The utility model provides a full-automatic key formula car accuse is played and is erected system and overcome above-mentioned defect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a full-automatic key formula car accuse erects system for solve one of the technical problem that exists among the above-mentioned prior art, if: in the prior art, a vehicle is often required to be placed in a special leveling environment for relevant measurement, the accuracy of a leveling result cannot be guaranteed, wheel centers of four tires are easily caused to be not on the same horizontal line, and then the subsequent erecting process is directly influenced.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a full-automatic one-button type vehicle control erecting system comprises a control part, a detection part and a display control part;

the control part comprises a core control module, a control panel, a power supply, a proportional valve driver, a proportional valve, a vertical driver, a vertical proportional valve and a vertical electric cylinder;

the detection part comprises a vertical angle sensor, a pressure sensor, a horizontal sensor, a protection circuit and an alarm circuit;

the display control part comprises an LED display screen;

the control panel is connected with the core control module;

the power supply is connected with the core control module;

the core control module, the proportional valve driver and the proportional valve are sequentially connected; a DA conversion circuit is connected between the core control module and the proportional valve driver;

the core control module connection, the erecting driver, the erecting proportional valve and the erecting electric cylinder are sequentially connected; a DA conversion circuit is connected between the core control module and the erecting driver;

the rising vertical angle sensor is connected with the core control module through an AD conversion circuit;

the pressure sensor is connected with the core control module through an AD conversion circuit;

the level sensor is connected with the core control module through an AD conversion circuit;

the protection circuit is connected with the core control module;

the alarm circuit is connected with the core control module;

the LED display screen is connected with the core control module.

Preferably, the core control module adopts STM32 series 32-bit flash memory microcontroller.

Preferably, the AD conversion circuit is MCP3208-CI/SL of Microchip company.

Preferably, the DA conversion circuit adopts MCP4822-E/SN of Microchip company.

Preferably, the photoelectric isolation module and the power amplification module are connected in sequence between the core control module and the LED display screen.

Preferably, the system further comprises a network communication interface, and the network communication interface is connected with the core control module.

Preferably, the system further comprises an I/O interface, and the I/O interface is connected with the core control module.

Preferably, the system further comprises a system debugging interface, and the system debugging interface is connected with the core control module.

Compared with the prior art, the utility model discloses the beneficial effect who has does: due to the particularity of the leveling system, the safety of the spare vehicle is ensured, and the requirements of high precision and rapidness of leveling indexes are met; when the vehicle carries out related leveling measurement, no matter what environment the vehicle is in and no matter what state the system is in at present, as long as all parts do not report faults, the system automatically detects the states of all supporting legs, reads the position information of a level sensor and adjusts the system to the level state at the highest speed; the erecting control is carried out on the premise that the integral leveling is finished, the stability of the action is guaranteed, the starting speed is limited, and when the angle reaches a specified angle, the rigid impact is reduced through deceleration.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an AD sampling and input filtering processing circuit according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of digital-to-analog conversion principle according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a CAN bus interface circuit according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of an RS485 bus interface circuit according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of an SPI interface processing circuit according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a digital input processing circuit according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of a digital output processing circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1 to 8 of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1, a fully automatic one-button vehicle control erecting system comprises a control part, a detection part and a display control part;

the control part comprises a core control module, a control panel, a power supply, a proportional valve driver, a proportional valve, a vertical driver, a vertical proportional valve and a vertical electric cylinder; the device is mainly used for various driving controls and power controls of the leveling system;

the detection part comprises a vertical angle sensor, a pressure sensor, a horizontal sensor, a protection circuit and an alarm circuit; the method is mainly used for data acquisition, abnormal protection and abnormal alarm of the leveling system;

the display control part comprises an LED display screen; process displays mainly for levelling systems, such as: the display device is used for displaying the working state of the supporting leg, the working state of the proportional valve, the working state of the drive amplifier, the completion condition of each action and the like;

the control panel is connected with the core control module; the output end of the control panel is connected with one input end of the core control module and is mainly used for inputting various operation signals to the core control module;

the power supply is connected with the core control module; the power supply output end of the power supply is connected with the power supply access end of the core control module and used for supplying power to the core control module;

the core control module, the proportional valve driver and the proportional valve are sequentially connected; one output end of the core control module is connected with the input end of the proportional valve driver, the output end of the proportional valve driver is connected with the input end of the proportional valve, the core control module sends an action signal of the proportional valve to the proportional valve driver, and the proportional valve driver drives the proportional valve according to the action signal; a DA conversion circuit is connected between the core control module and the proportional valve driver;

the core control module, the erecting driver, the erecting proportional valve and the erecting electric cylinder are sequentially connected; used for finishing the erecting action; a DA conversion circuit is connected between the core control module and the erecting driver;

the rising vertical angle sensor is connected with the core control module through an AD conversion circuit; the output end of the rising vertical angle sensor is connected with one input end of the core controller and used for sending a rising vertical angle signal to the core control module;

the pressure sensor is connected with the core control module through an AD conversion circuit; the output end of the pressure sensor is connected with one input end of the core controller and used for sending the pressure signal to the core control module;

the level sensor is connected with the core control module through an AD conversion circuit; the output end of the level sensor is connected with one input end of the core controller and used for sending a signal whether the level is reached to the core control module;

the protection circuit is connected with the core control module; the input end of the protection circuit is connected with one output end of the core control module and used for starting the protection of the leveling system;

the alarm circuit is connected with the core control module; the input end of the alarm circuit is connected with one output end of the core control module and is used for alarming abnormal conditions in the leveling process;

the LED display screen is connected with the core control module; the input end of the LED display screen is connected with one output end of the core control module and used for displaying the working state of the supporting leg, the working state of the proportional valve, the working state of the drive amplifier, the completion condition of each action and the like.

Preferably, the core control module adopts STM32 series 32-bit flash memory microcontroller.

The core control module is a core component of the whole system, is responsible for multiple functions such as information processing, control, system detection, communication, fault detection and processing and is also a key component capable of realizing system performance indexes. The controller must have high reliability, real-time performance and complete functions, and therefore must be designed carefully.

At present, with the wide application of computer technology, computer control technology has become the mainstream technology of controller design. According to different scales and configurations of adopted computers, the system mainly comprises various types such as an industrial personal computer, a single chip microcomputer, a PLC (programmable logic controller), an embedded computer and the like. The industrial personal computer is used as a special application of the PC in industrial control, and has most of the advantages of the PC, such as rich resources, complete interfaces, good expandability and the like; but its size and power consumption are difficult to adapt to the needs of small systems. A Micro Controller Unit (MCU), also called a single chip microcomputer, generally refers to a micro processor formed by using 8/16 bit word length microprocessor as a core and matching with various peripheral functional components, and has the advantages of small size, low power consumption, high reliability, low cost, etc., but the micro processor unit has the disadvantage of limited processing capability and is difficult to satisfy calculation and information processing with large load. PLC (programmable logic controller) uses a type of programmable memory for storing programs therein, executing instructions for user-oriented operations such as logic operations, sequence control, timing, counting and arithmetic operations, and controlling various types of machinery or manufacturing processes through digital or analog input/output.

The embedded system is a special computer system which takes application as a center, is based on computer technology, can cut software and hardware and is suitable for strict requirements of application systems on functions, reliability, cost, volume, power consumption and the like. At present, embedded systems have become the mainstream technology in the field of special purpose computers, and are also the main direction of development in the future. The embedded system takes a 32-bit embedded microprocessor/Digital Signal Processor (DSP)/System On Chip (SOC)/multi-core processor on Chip (CMP) as a core, is far higher than 8/16 in terms of hardware configuration and computing power and is a single chip microcomputer, and can meet the real-time requirements of more complex data computing and control algorithms.

By comprehensively comparing the advantages and the disadvantages of the mainstream technology and combining the specific requirement analysis of the system, the core control module takes an STM32 series 32-bit flash memory microcontroller as a core on the basis of an embedded system technology to form a hardware platform and system software. The STM32 series 32-bit flash microcontroller is specially designed to meet the requirements of an embedded field integrating high performance, low power consumption, real-time application and competitive price, and uses a breakthrough Cortex-M3 kernel from ARM company.

As shown in FIG. 2, the AD conversion circuit preferably employs MCP3208-CI/SL available from Microchip corporation.

As the chip integration degree and the process level are improved, serial AD (especially, high-precision serial AD) conversion chips are being widely adopted. Serial AD conversion chips are gradually replacing parallel AD conversion chips with a series of advantages of small pin count (usually 8 pins or less), high integration level (basically no need of external connection of other devices), low price, easy digital isolation, easy chip upgrade, low price, etc., at the cost of only slightly reducing speed (mainly the speed of data serial bit-by-bit transmission, not conversion speed).

MCP3208-CI/SL from Microchip company is selected according to the actual needs of the scheme. The MCP3208 is a low power, 8-channel, 12-bit successive approximation sampling chip, and the MCP3208 device of the Microchip is a 12-bit successive approximation type Analog-to-Digital (a/D) converter with an on-chip sample and hold circuit.

MCP3208 may be programmed to provide 4 sets of differential input pairs or 8 single-ended inputs. The Differential Nonlinearity (DNL) specification is ± 1LSB, and the Integral Nonlinearity (INL) is ± 1 LSB. It communicates with the device using a simple serial port compatible with the SPI protocol. The slew rate of the device may be as high as 100 ksps. MCP3208 devices have a wide voltage operating range of 2.7V to 5.5V. The low current design makes it consume only 500nA and 320 μ a of typical standby and operating current. MCP3208 is provided in a 16 pin PDIP and SOIC package.

For multi-channel analog signals input by a pressure sensor or a vertical angle sensor, firstly, sampling is carried out through a high-precision resistor, then, second-order filtering is carried out on voltage signals output by sampling, high-frequency interference components in the filtered signals are sent to the input end of an AD sampling chip. Since the 8 channel circuits are identical, the description will not be repeated here.

MCP3208A/D converter uses a conventional SAR architecture. Under the structure, after the start bit is received, the signal is collected by the internal sampling holding capacitor for 1.5 clock cycles at the fourth rising edge of the serial clock. After sampling is completed, the input switch of the converter is opened, and the device uses the charges collected by the internal sample-and-hold capacitor to generate a serial digital output code of 12 bits. The conversion rate of MCP3204/3208 may reach 100 ksps.

The data sampling is event-driven by a timing interruption signal in the MCU, and when the timing interruption is reached, the MCU starts a cyclic scanning from the AD sampling to finish the data acquisition of 8 channels.

As shown in FIG. 3, the DA conversion circuit preferably employs MCP4822-E/SN of Microchip corporation.

The analog-to-digital conversion here is of Microchip corporationMCP4822-E/SN, device 2.7V-5.5V, low power consumption, low DNL 12-bit Digital-to-Analog Converter (DAC), with internal bandgap voltage reference, selectable 2x buffer output and Serial Peripheral Interface (SPI)^TM). The MCP482X device has the advantages of low DNL error, low proportional temperature coefficient and fast set-up time by adopting a resistor string structure. The MCP482X series contains double buffer registers that allow simultaneous updates using the LDAC pins, and the device also contains Power-On Reset (POR) circuitry to ensure reliable Power-up. The main technical parameters of the device are as follows:

1)12 bit resolution

2) + -0.2 LSb DNL (typical value)

3) +/-2 LSb INL (typical value)

4) Double channel

5) Rail to rail output

6)SPI^TMInterface supporting 20MHz clock

7) LDAC pin for simultaneous latching of dual-channel DAC

8) Fast set time of 4.5 mus

9) Selectable unity gain or 2x gain output

10)2.048V internal bandgap voltage reference

11) Temperature coefficient of VREF of 50 ppm/DEG C

12)2.7V to 5.5V single power supply work

13) Working temperature range: -40 ℃ to +125 DEG C

The system totally adopts 4 MCP4822-E/SN digital-to-analog alternating chips, and each chip completes the conversion of 2 channels, so that the digital-to-analog alternating of 8 channels in the system is completed. Since the 4 sets of conversion circuits are identical, only one set will be described here.

The MCP4822 is hung on an SPI bus of the MCU, each chip is gated through a chip selection signal generated by the logic processing circuit, and Schmitt triggers are added during input and output of clock signals, the chip selection signals and data for improving the reliability of the system. After the digital-to-analog conversion is output, because the chip can only provide unipolar output, bipolar conditioning and conversion are needed to be carried out on the circuit, firstly, bipolar conversion is carried out, and then, filtering and driving capability amplification are carried out.

Preferably, the system further comprises a network communication interface, and the network communication interface is connected with the core control module.

The network communication interface adopts the modularized design, all modules are connected with a core module through buses, the core board is mainly provided with a CAN bus for communicating with an upper computer, an RS485 bus for reading data of the level sensor and communicating with other daughter cards, an SPI bus for communicating with the daughter cards, and an RS232 bus interface for standby is preset on the board. The design of each bus interface is described separately below.

As shown in fig. 4, the CAN bus is used for communicating with an upper computer, since the MCU integrates a CAN bus interface, only an interface chip needs to be configured, the interface chip selects TJA1050, in order to suppress interference introduced by a communication line, especially during long-distance transmission, and during working or debugging of a product, an impact signal is also introduced by unintentional hot plugging of an operator, so that a corresponding suppression circuit is connected in parallel to the interface, that is, V3 and V4 in the figure complete interference suppression and circuit protection together, and simultaneously, in order to perform impedance matching, a 120 ohm resistor is connected in parallel between the interfaces CANH and CANL.

As shown in fig. 5, RS-485 implements communication by using balanced transmission and differential reception: the transmitting end converts TTL level signals of the serial port into differential signals a and b for output, and the differential signals are restored into the TTL level signals at the receiving end after cable transmission. Because the transmission line usually uses twisted pair, and is differential transmission, so the ability of resisting common mode interference is extremely strong, and the sensitivity of the bus transceiver is extremely high, and the voltage can be detected to be as low as 200 mv. The transmitted signal can be recovered even out of kilometers. The maximum communication distance of the RS-485 is about 1200m, and the maximum transmission rate is 10 mb/s.

RS-485 adopts half-duplex working mode, supports the communication of multiple spot data. The RS-485 bus network topology generally adopts a bus type structure with matched terminals. That is, a bus is adopted to connect all the nodes in series, and the ring-shaped or star-shaped network is not supported. The RS-485 bus generally supports a maximum of 32 nodes, and if a special 485 chip is used, 128 or 256 nodes can be achieved, and a maximum of 400 nodes can be supported.

At this time, an SP485EN chip produced by SIPEX is selected as an interface processing main chip, and interference suppression and impedance matching processing are carried out on the interface in the same way as the processing mode of the CAN bus.

As shown in fig. 6, the MCU integrates a high-speed SPI bus, and here, only one schmitt trigger is added from the viewpoint of increasing the driving capability and improving the anti-interference performance, and the specific circuit is as follows, and simultaneously, two chip selection signals are extended through the GPIO port of the MCU for extending multiple daughter cards.

Preferably, the system further comprises an I/O interface, and the I/O interface is connected with the core control module.

As shown in fig. 7 and 8, for various digital input, there are key information (at least 6) of the panel, there are switch information in place, including 4 proximity switch signals on the hydraulic support leg, 6 switches in place in the vertical part, the total digital input signal is greater than 16, in order to avoid temporarily increasing the IO expansion port, 24-channel digital output interface is considered during product design, in order to save the IO interface of the MCU, the digital input is serial data input through shift register conversion after being shaped and level-converted, thus greatly simplifying design, and simultaneously realizing modularization and improving reliability.

As shown in the figure, when the PI1 in the figure is switched on or is output to a power supply voltage by other interfaces, the MOS tube is conducted, the I1 outputs low level, and other digital quantity inputs are similar. When the controller reads data through the SPI bus in a fixed period, the state information of each switch can be read into the MCU through the bus, and the SPI of the MCU is 8-bit word length, so that all the state information of the switches can be read out after 3 times of reading operation.

The system also has numerous digital quantity output information, such as driving signals of a switch electromagnetic valve, LED indicator light information and the like, and according to the principle of saving IO ports, the digital quantity output is moved to an output port of a register through an SPI bus and a shift register in the same manner of adopting an SPI bus, in order to improve the anti-interference capacity, a first-stage Schmitt trigger circuit is specially added, and finally power amplification is carried out through a power MOS (metal oxide semiconductor) so as to drive each execution unit, and a driving stage has 4A current driving capacity.

Preferably, the system further comprises a system debugging interface, and the system debugging interface is connected with the core control module.

The system debugging interface is used for accessing the debugging control equipment of the leveling system.

Wherein, the rising angle sensor selects an NG4I inclination angle sensor of German Seika, and the main parameters are as follows:

1) the model is as follows: NG4I

2) Measurement range: minus 80 to plus 80 DEG

3) Measuring a shaft: single shaft

4) Absolute accuracy: 0.01 degree

5) Long-term stability: 0.01 degree

6) Zero point temperature coefficient: 0.001 °/°C

7) Outputting a signal: 4-20mA

8) Working temperature: minus 40 ℃ to plus 85 DEG C

9) Storage temperature: minus 40 ℃ to plus 90 DEG C

Wherein, the level sensor selects SST460 series inclination angle sensors produced by Shanghai Huigang, and has the following advantages:

1) which can be set to continuous output and command output

2) Filtering parameter setting can be carried out according to the field environment

3) Can input local gravity acceleration value into the sensor to ensure the accuracy of the measured data in the local

4) The measurement precision at normal temperature reaches +/-20

5) Error of the horizontal axis is less than or equal to +/-0.2 percent FS

6) The zero repeatability under any range reaches +/-9

7) Reference implements nearly 50 domestic and foreign industry/military standards

The selected model parameters are as follows:

1) the model is as follows: SST460-10-C0

2) Measuring a shaft: x-axis and Y-axis

3) Product range: plus or minus 5 degree

4) Resolution ratio: 0.001 °

5) Absolute accuracy: 0.003 °

6) Long-term stability: 0.01

7) Zero point temperature coefficient: +/-0.0008 deg./deg.C

8) Temperature coefficient of sensitivity: less than or equal to 50 ppm/DEG C

9) Power-on start time: 0.5s

10) Response time 0.02s

11) Outputting a signal: RS485

12) MTBF: 50000 hours/time

13) Insulation resistance: greater than 100M omega

14) Protection grade: IP67

The pressure sensor selects MBS1250 series pressure sensor produced by Danfoss, 4-20mA output, and the related parameters are as follows:

1) the product model is as follows: MBS1250-36-1-1C1-GB04

2) Measuring a medium: liquids or gases

3) The whole material is as follows: diaphragm 316S stainless steel, process connection 314 stainless steel

4) Pressure range: -0.1MPa to 0-25 MPa

5) Outputting a signal: 4-20mA, two-wire system

6) Ambient temperature: 40 ℃ below zero to 85 DEG C

7) Protection grade: IP66

8) Supply voltage: DC8-32V

9) Product precision: 0.25% FS

10) Overload capacity: 200% FS

11) Electrical interface: m12 × 1.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims (8)

1. A full-automatic one-button type vehicle control erecting system is characterized by comprising a control part, a detection part and a display control part;

the control part comprises a core control module, a control panel, a power supply, a proportional valve driver, a proportional valve, a vertical driver, a vertical proportional valve and a vertical electric cylinder;

the detection part comprises a vertical angle sensor, a pressure sensor, a horizontal sensor, a protection circuit and an alarm circuit;

the display control part comprises an LED display screen;

the control panel is connected with the core control module;

the power supply is connected with the core control module;

the core control module, the proportional valve driver and the proportional valve are sequentially connected; a DA conversion circuit is connected between the core control module and the proportional valve driver;

the core control module connection, the erecting driver, the erecting proportional valve and the erecting electric cylinder are sequentially connected; a DA conversion circuit is connected between the core control module and the erecting driver;

the rising vertical angle sensor is connected with the core control module through an AD conversion circuit;

the pressure sensor is connected with the core control module through an AD conversion circuit;

the level sensor is connected with the core control module through an AD conversion circuit;

the protection circuit is connected with the core control module;

the alarm circuit is connected with the core control module;

the LED display screen is connected with the core control module.

2. The fully automatic one-button vehicle control erecting system of claim 1 wherein said core control module employs an STM32 series 32-bit flash memory microcontroller.

3. The system of claim 1, wherein the AD conversion circuitry is MCP3208-CI/SL from Microchip.

4. The system of claim 1, wherein the DA conversion circuit is implemented using MCP4822-E/SN available from Microchip.

5. The full-automatic one-button vehicle control erecting system according to claim 1, wherein a photoelectric isolation module and a power amplification module are connected between the core control module and the LED display screen in sequence.

6. The system of claim 1, further comprising a network communication interface, wherein the network communication interface is coupled to the core control module.

7. The system of claim 1, further comprising an I/O interface, the I/O interface being coupled to the core control module.

8. The fully automatic one-button vehicle control erecting system of claim 1 further comprising a system debugging interface, wherein said system debugging interface is connected with said core control module.

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