CN103941595A - Vehicle data acquisition simulation system and method - Google Patents

Vehicle data acquisition simulation system and method Download PDF

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CN103941595A
CN103941595A CN201410205552.6A CN201410205552A CN103941595A CN 103941595 A CN103941595 A CN 103941595A CN 201410205552 A CN201410205552 A CN 201410205552A CN 103941595 A CN103941595 A CN 103941595A
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interface
signal
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ecu
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CN103941595B (en
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郭超
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Wuhu Bethel Electronic Control Systems Co Ltd
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Wuhu Bethel Electronic Control Systems Co Ltd
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Abstract

The invention relates to a vehicle data acquisition simulation system and a vehicle data acquisition simulation method. The simulation system comprises a power supply module, a data interface conversion module, a computer system, a signal acquisition module and a system rack module, wherein the data interface conversion module is respectively connected with the computer system and the signal acquisition module, the power supply module powers the data interface conversion module and the signal acquisition module, and the system rack module is respectively connected with the data interface conversion module and the signal acquisition module. According to the simulation system, a circuit adopts a modular design, all modules are relatively independent, the integral performance is more reliable, and the work of the other modules can not be influenced by the upgrading of single module; furthermore, components and parts selected by the circuit are good in electrical performance and low in price; meanwhile, the vehicle data acquisition simulation system has the functions of data real-time memory and data error detection, so that the error rate of the finally received data can be reduced at the utmost; in addition, the output of a wheel speed sensor can be truly simulated by a high-side signal monitoring function, and the switching between driving and driven wheel speed output modes can be realized by an interface.

Description

A kind of vehicle data collection analogue system and method
Technical field
The invention belongs to data collecting field, specifically it relates to a kind of vehicle data collection analogue system.
Background technology
When automobile is born, the data acquisition emulation test system of vehicle is in the exploitation of vehicle, test, and vital role is just being played the part of in demarcation aspect, right.In recent years, along with the progress of vehicle technology and the raising of automobile driving speed, this importance shows more and more obviously.Numerous automobile engineers is pouring into a large amount of painstaking effort aspect improvement and optimization automobile analogue system.Existing analogue system is by following deficiency: 1 circuit aspect does not adopt modular design, and data-interface is reserved the shortage property prepared, and sampled signal type lacks dirigibility.Although each circuit contact closely, as long as there is a part of circuit to go wrong, just can affect circuit other parts, the reliability of hardware circuit reduces; 2 hardware and softwares are relatively independent, do not go detection hardware fault with software program.Circuit is more complicated, and integrated degree is not high enough, and cost is high.3 system softwares can not answer actual demand to change, and more by force but also therefore specific aim deficiency of data reading displayed versatility, shows not directly perceived.The transmission speed of 4 image data is limited, and stability deficiency is gathering, and easily losing and make mistakes in transmitting procedure.5 can not wheel speed emulation can not simulate the true output of wheel speed sensors.
Summary of the invention
For the shortcoming of above prior art, the invention provides a kind of overall performance reliably and can contact closely, the compatibility between modules is strong, and hardware and software industry is relatively independent, also has the analogue system that each signal is provided by true device simultaneously.
To achieve these goals, the technical solution used in the present invention is: a kind of vehicle data collection analogue system, comprise power module, data-interface modular converter, computer system, signal acquisition module, system rack module, data-interface modular converter is connected with the department of computer science signal acquisition module of unifying respectively, and power module 1 is connected to respectively data-interface modular converter and signal acquisition module for data-interface modular converter and signal acquisition module power supply, system rack module.
Described power module comprises power input interface, power module, power output interface, insulating power supply output interface; General supply input interface connects power module, and it is the power supply of data-interface modular converter that power module connects power output interface, and insulating power supply output interface is signal acquisition module power supply.
Described data conversion module comprises data handling system, and data handling system is connected with CAN communication interface, analog input mouth, digital input port, simulation delivery outlet, digital output, FSC high-speed data acquisition interface respectively, realizes collection and the output of data; Data handling system is connected to LAN communication interface and realizes the exchange of data and computer system.
Signal acquisition module comprises controllable current source module, wheel speed flash interface, differential conversion module, force samples module, digital quantity sampling module, ECU interface, pressure acquisition module is connected to the Gather and input of analog input Interface realization oil circuit pressure signal, ECU interface is connected to controllable current source by flash interface and realizes the wheel speed output signal that enable and receive controllable current source of ECU flash signal to controllable current source output, and controllable current source is connected to digital output, and to realize wheel speed current signal output-controlled; ECU interface is connected to the CAN signal conversion of CAN Interface realization ECU and data conversion module; The differential conversion module that is connected to ECU interface realizes ECU SPI signal and converts differential signal transmission to and increased the reliability of high speed data transfer; Differential conversion module is connected to the FSC data acquisition of FSC high-speed data acquisition Interface realization ECU.
Described system rack module comprises car load oil circuit and wheel cylinder, user input signal module, pressure sensor interface, user input signal module is connected to voltage transformation module, and voltage transformation module is connected to data-interface modular converter and realizes user control signal collection; Car load oil circuit and wheel cylinder are connected to pressure transducer, and pressure transducer is connected to pressure acquisition module.
A kind of vehicle data collection emulation mode, its feature exists: the method comprises the following steps: step 1, system are powered to pressure transducer to system power supply with by insulating power supply by power module to power input interface by mains-supplied.Step 2, car load oil circuit and wheel cylinder are sent to data forwarding module by pressure transducer sampling module pressure signal, change into lan signal issue computer system by data handling system; Step 3, user input signal module are connected to voltage transformation module and become signal that digital input port can be identified to change into lan signal by data handling system control signal voltage transitions to issue computer system.The fsc signal of step 4, ECU forwards into differential signal through difference block and changes into lan signal by data handling system and issue computer system.The CAN signal of step 5, ECU interface is direct-connected to be changed into lan signal to data handling system and issues computer system.Step 6, ECU interface wheel speed flash signal are connected to the output enable control of current source module, in the time that ECU flash is worked, electric current output module could be exported and simulate real wheel speed sensors duty, and digital output connects the low limit of wheel speed of the size supply ECU interface of current source module control electric current output.
Beneficial effect of the present invention is: 1, circuit adopts modular design, and relatively independent between modules, overall performance is more reliable, and the upgrading of separate modular can not affect the work of other modules.2, the selected components and parts good electric property of circuit, price is low.3, circuit adopts 4 laminate PCB designs, uses sticking-element, two-sided paster, and more compact structure, integrated level is high, and system miniaturization is easier.4, there is data real-time storage and data error detection function, can maximum possible reduce the error rate that finally receives data.5, can export by real simulation wheel speed sensors with flash signal monitoring function, also can pass through Interface realization active/passive wheel speed output mode switching 6, real CAN bus data transport module, can simulated automotive CAN exchanges data.7, real vehicle body user input signal (igniting, brake pedal, car load oil circuit and wheel cylinder, vacuum booster, master cylinder).
Brief description of the drawings
Mark in content and the figure below Figure of description of the present invention being expressed is briefly described:
Fig. 1 is the system architecture diagram of the specific embodiment of the invention;
Fig. 2 is the system operating structure figure of the specific embodiment of the invention.
Wherein 1. power modules, 2. data-interface modular converter, 3. computer system, 4. signal acquisition module, 5. system rack module, 6. electronic control unit, 11. general supply input interfaces, 12. power modules, 13. power output interfaces, 14. insulating power supply output interfaces, 21.LAN communication interface, 22.CAN communication interface, 23. analog input mouths, 24. digital input ports, 25 simulation delivery outlets, 26. digital outputs, 27.FSC high-speed data acquisition interface, 28. data handling systems, 41. controllable current source modules, 42. wheel speed flash interfaces, 43. differential conversion modules, 44. force samples modules, 45. digital quantity sampling modules, 46.ECU interface, 51. car load oil circuit and wheel cylinders, 52. user input signal modules, 53. pressure sensor interfaces.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of related each member, structure, each several part and annexation, each several part and principle of work, manufacturing process and operation using method etc., be described in further detail, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technical scheme.
As shown in Figure 1, a kind of vehicle data collection analogue system, this system comprises: power module 1, data-interface modular converter 2, computer system 3, signal acquisition module 4, system rack module 5, data-interface modular converter 2 is connected with computer system 3 and signal acquisition module 4 respectively, and power module 1 is powered for data-interface modular converter 2 and signal acquisition module 4; System rack module 5 is connected to respectively data-interface modular converter 2 and signal acquisition module 4, be connected to signal acquisition module 4 for the electronic control unit (ECU) of testing, circuit of the present invention adopts modular design, relatively independent between modules, overall performance is more reliable, and the upgrading of separate modular can not affect the work of other modules.
As shown in Figure 2, power module 1 comprises power input interface 11, power module 12, power output interface 13, insulating power supply output interface 14; Described system power supply module 1 is connecting power module 12 by general supply input interface 11, and power module 12 connects power output interface 13 powers for data-interface modular converter 2, and insulating power supply output interface 14 is powered for signal acquisition module 4.
Data conversion module 2 comprises data handling system 28, data handling system 28 connects respectively at LAN communication interface 21, CAN communication interface 22, analog input mouth 23, digital input port 24, simulation delivery outlet 25, digital output 26, the FSC high-speed data acquisition interface 27 of computer system 3, realizes collection and the output of data; Data handling system is connected to LAN communication interface 21 and realizes the exchange of data and PC.The interior digital output 26 of described data conversion module 2 connects 41 to be realized the control of wheel speed output enable and receives the low limit of wheel speed signal.Simulation output interface 25 is as analog output spare interface.CAN communication interface 22 is connected to ECU by ECU interface 46 CAN signal is connected to ECU.FSC high-speed data acquisition interface 27 is connected to differential conversion module 43 and receives ECU and send over the FSC data after differential transformation.Analog input interface 23 receives by force samples module 44 pressure that pressure transducer 53 sends.Digital signal input interface 24 receives user input signal module 52 control signal input by level switch module 45, realizes the data-signal exchange between ECU and MCU.
Signal acquisition module 4 comprises controllable current source module 41, wheel speed flash interface 42, differential conversion module 43, force samples module 44, digital quantity sampling module 45, ECU interface 46, power module 12 connects insulating power supply output interface 14 powers for force samples module 44, and signal acquisition module 4 internal pressure acquisition modules 44 are connected to pressure transducer 53.Pressure acquisition module 44 is connected to analog input interface 23 and realizes the Gather and input of oil circuit pressure signal, the interior ECU interface 46 of signal acquisition module 4 is connected to controllable current source 41 by flash interface 42 and realizes the wheel speed output signal that enable and receive controllable current source 41 of ECU flash signal to controllable current source output, and controllable current source 41 is connected to digital output 26, and to realize wheel speed current signal output-controlled; ECU interface 46 is connected to CAN interface 22 realizes the CAN signal conversion of ECU and data conversion module; The differential conversion module 43 that is connected to ECU interface 46 realizes ECU SPI signal and converts differential signal transmission to and increased the reliability of high speed data transfer; Differential conversion module 43 is connected to FSC high-speed data acquisition interface 27 and realizes the FSC data acquisition of ECU; Data handling system 28 is carried out redundancy check to collected data in real time, abandons number of non-compliances certificate, guarantees the validity and reliability of institute's image data.
System rack module 5 includes car load oil circuit and wheel cylinder 51, user input signal module 52, pressure sensor interface 53, user input signal module 52 is connected to voltage transformation module 45, and voltage transformation module 45 is connected to digital quantity input module 24 and realizes user control signal collection; Stand module 5 car load oil circuits and wheel cylinder 51 are connected to pressure transducer 53.
The present invention adopts following methods to control, and step 1, system are exported 1 road 12V power supply to power input interface 11 by power module 12 by mains-supplied and powered to pressure transducer to system power supply and insulating power supply 14.
Car load oil circuit on step 2, stand and wheel cylinder 51 are sent to data forwarding module 2 by pressure transducer sampling module 44 pressure signal and change into lan signal by data handling system 28 and issue computer system 3.
User input signal module 52 on step 3, stand is connected to voltage transformation module 45 and becomes signal that digital input port 24 can be identified to change into lan signal by data handling system 28 control signal voltage transitions to issue computer system 3.
The fsc signal of step 4, ECU forwards into differential signal through difference block 43 and changes into lan signal by data handling system 28 and issue computer system 3.
The CAN signal of step 5, ECU interface 46 is direct-connected to be changed into lan signal to data handling system 28 and issues computer system 3.
Step 6, ECU interface 46 wheel speed flash signals are connected to the output enable control of current source module 41, in the time that ECU flash is worked, electric current output module could be exported and simulate real wheel speed sensors duty, complete the flash monitoring function of wheel speed signal, digital output 26 connects current source module 41 controls the size of electric current output and supplies with the low limit of wheel speed of ECU interface 46 simultaneously.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.

Claims (6)

1. a vehicle data collection analogue system, it is characterized in that: this system comprises power module (1), data-interface modular converter (2), computer system (3), signal acquisition module (4), system rack module (5), data-interface modular converter (2) is connected with computer system (3) and signal acquisition module (4) respectively, power module 1 is data-interface modular converter (2) and signal acquisition module (4) power supply, system rack module (5) is connected to respectively data-interface modular converter (2) and signal acquisition module (4).
2. according to the analogue system shown in claim 1, it is characterized in that: described power module (1) comprises power input interface (11), power module (12), power output interface (13), insulating power supply output interface (14); General supply input interface (11) connects power module (12), it is data-interface modular converter (2) power supply that power module (12) connects power output interface (13), and insulating power supply output interface (14) is signal acquisition module (4) power supply.
3. according to the analogue system shown in claim 1, it is characterized in that: described data conversion module (2) comprises data handling system (28), data handling system (28) is connected with CAN communication interface (22), analog input mouth (23), digital input port (24), simulation delivery outlet (25), digital output (26), FSC high-speed data acquisition interface (27) respectively, realizes collection and the output of data; Data handling system (28) is connected to LAN communication interface (21) and realizes the exchange of data and computer system (3).
4. according to the analogue system shown in claim 3, it is characterized in that: signal acquisition module (4) comprises controllable current source module (41), wheel speed flash interface (42), differential conversion module (43), force samples module (44), digital quantity sampling module (45), ECU interface (46), pressure acquisition module (44) is connected to analog input interface (23) and realizes the Gather and input of oil circuit pressure signal, ECU interface (46) is connected to controllable current source (41) by flash interface (42) and realizes the wheel speed output signal that enable and receive controllable current source (41) of ECU flash signal to controllable current source output, controllable current source (41) is connected to digital output (26), and to realize wheel speed current signal output-controlled, ECU interface (46) is connected to CAN interface (22) realizes the CAN signal conversion of ECU and data conversion module, the differential conversion module (43) that is connected to ECU interface (46) realizes ECU SPI signal and converts differential signal transmission to and increased the reliability of high speed data transfer, differential conversion module (43) is connected to FSC high-speed data acquisition interface (27) and realizes the FSC data acquisition of ECU.
5. analogue system according to claim 4, it is characterized in that: described system rack module (5) comprises car load oil circuit and wheel cylinder (51), user input signal module (52), pressure sensor interface (53), user input signal module (52) is connected to voltage transformation module (45), and voltage transformation module (45) is connected to data-interface modular converter (2) and realizes user control signal collection; Car load oil circuit and wheel cylinder (51) are connected to pressure transducer (53), and pressure transducer (53) is connected to pressure acquisition module (44).
6. according to a kind of vehicle data collection emulation mode described in claim 1-5 any one, its feature exists: the method comprises the following steps:
Step 1, system are given system power supply to power input interface (11) by power module (12) by mains-supplied and are powered to pressure transducer by insulating power supply (14).
Step 2, car load oil circuit and wheel cylinder (51) are sent to data forwarding module (2) by pressure transducer sampling module (44) pressure signal, change into lan signal issue computer system (3) by data handling system (28).
Step 3, user input signal module (52) are connected to voltage transformation module (45) and become signal that digital input port (24) can be identified to change into lan signal by data handling system (28) control signal voltage transitions to issue computer system (3).
The fsc signal of step 4, ECU forwards into differential signal through difference block (43) and changes into lan signal by data handling system (28) and issue computer system (3).
The CAN signal of step 5, ECU interface (46) is direct-connected to be changed into lan signal to data handling system (28) and issues computer system (3).
Step 6, ECU interface (46) wheel speed flash signal are connected to the output enable control of current source module (41), in the time that ECU flash is worked electric current output module could work simulation real wheel speed sensors duty complete the monitoring function to flash signal simultaneously, digital output (26) connects current source module (41) controls the size of electric current output and supplies with the low limit of wheel speed of ECU interface (46).
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CN113093567A (en) * 2021-03-24 2021-07-09 一汽奔腾轿车有限公司 Simulation system and simulation method of AK protocol wheel speed sensor

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