CN210109590U - Data acquisition and recording device for vehicle - Google Patents
Data acquisition and recording device for vehicle Download PDFInfo
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- CN210109590U CN210109590U CN201920697635.XU CN201920697635U CN210109590U CN 210109590 U CN210109590 U CN 210109590U CN 201920697635 U CN201920697635 U CN 201920697635U CN 210109590 U CN210109590 U CN 210109590U
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Abstract
The demand to automobile-used data acquisition, the utility model provides an automobile-used data acquisition recorder for regularly gather the data on sensor signal and the CAN bus, save FLASH memory, download the server from the USB interface when needing data, like the PC, supply the PC to carry out data analysis, provide support for the failure analysis and the maintenance of vehicle.
Description
Technical Field
The utility model belongs to the technical field of information communication uses, a vehicle data acquisition recorder is related to, vehicle information management system who is particularly useful for new energy automobile.
Background
The data acquisition application is very wide, and the sensor data and the bus data need to be acquired and recorded in a vehicle information management system and then downloaded for analysis. Therefore, it is necessary to develop a data acquisition and recording device for vehicles.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an automobile-used data acquisition recorder for regularly gather and save sensor data and CAN bus data, and in good time will data download to the server, its characterized in that, this automobile-used data acquisition recorder includes following hardware circuit part: microcontroller, power supply circuit, USB interface circuit, CAN drive circuit, PT1000 temperature signal conditioning acquisition circuit, current signal conditioning acquisition circuit, pulse input conditioning acquisition circuit, NANDFLASH memory circuit, ferroelectric memory circuit, real-time clock circuit and watchdog circuit, wherein
The microcontroller is used for controlling the power supply circuit, the USB interface circuit, the CAN drive circuit, the PT1000 temperature signal conditioning and collecting circuit, the current signal conditioning and collecting circuit, the pulse input conditioning and collecting circuit, the NANDFLASH storage circuit, the ferroelectric storage circuit, the real-time clock circuit and the watchdog circuit;
the power supply circuit is used for providing power required by normal work of the microcontroller, the USB interface circuit, the CAN drive circuit, the PT1000 temperature signal conditioning and acquiring circuit, the current signal conditioning and acquiring circuit, the pulse input conditioning and acquiring circuit, the NANDFLASH storage circuit, the ferroelectric storage circuit, the real-time clock circuit and the watchdog circuit;
the USB interface circuit is used for being connected with the server to realize a communication interface between the vehicle data acquisition and recording device and the server;
the CAN driving circuit is used for being connected with a CAN bus to realize a communication interface between the vehicle data acquisition and recording device and the CAN bus;
the PT1000 temperature signal conditioning and collecting circuit is used for being externally connected with a temperature sensor, providing working voltage for the temperature sensor, amplifying a temperature signal from the temperature sensor, performing AD conversion, and collecting the temperature signal by the microcontroller through an SPI (serial peripheral interface);
the current signal conditioning and collecting circuit is used for being externally connected with the pressure sensor, carrying out current-voltage conversion on a current signal from the pressure sensor, then carrying out AD conversion on the current signal, and collecting the current signal by the microcontroller through the SPI interface;
the pulse input conditioning acquisition circuit is used for being externally connected with the mileage sensor, filtering and isolating a pulse input signal from the mileage sensor and entering the input end of the microcontroller;
the NANDFLASH storage circuit is used for storing the acquired sensor data and CAN bus data;
the ferroelectric storage circuit is used for storing various operation parameter data and caching other data;
the real-time clock circuit is used for generating system time so as to be used for time marking of data recording;
the watchdog circuit is used for monitoring the system, and when an abnormality occurs, the system is restored to a normal working state through resetting.
Preferably, the vehicle data acquisition and recording device further comprises a software part, wherein the software part comprises upper computer software and single chip microcomputer embedded software, the upper computer software comprises a driving program and data downloading software, and the single chip microcomputer embedded software is used for completing control and data processing of the hardware circuit part.
Preferably, the data acquisition and recording device for the vehicle further comprises a shell, and the shell is used for installing and protecting the hardware circuit part.
Preferably, the CAN drive circuit further comprises an isolation chip, and the isolation chip is used for isolating signals on two sides of the CAN drive circuit and improving the anti-interference capability.
Preferably, the real-time clock circuit also maintains its clock through a battery backup.
Preferably, the microcontroller is implemented by an MC9S12XEP100 single chip microcomputer of FreeScale corporation, a parallel bus interface of the single chip microcomputer is connected with the USB interface circuit, the NandFlash storage circuit and the ferroelectric storage circuit, an SPI interface of the single chip microcomputer is connected with the PT1000 temperature signal conditioning and collecting circuit and the AD converter of the current signal conditioning and collecting circuit, and an I2C interface of the single chip microcomputer is connected with the real-time clock circuit.
The utility model provides a data on automobile-used data acquisition recorder CAN regularly gather sensor signal and the CAN bus, saves FLASH memory, downloads the server from the USB interface when needing data, like the PC, supplies the PC to carry out data analysis, provides support for the failure analysis and the maintenance of vehicle.
Drawings
Fig. 1 shows that the utility model provides a vehicle data acquisition recorder's hardware circuit structure schematic diagram.
Detailed Description
The data acquisition application is very wide, and the sensor data and the bus data need to be acquired and recorded in a vehicle information management system and then downloaded for analysis. The utility model provides a data acquisition recorder main function for vehicle is the data of regularly gathering sensor signal and CAN bus, saves FLASH memory, downloads the server from the USB interface when needing data, like the PC for data analysis. The data acquisition and recording device for the vehicle comprises a hardware circuit, software and a shell.
As shown in fig. 1, the hardware circuit portion of the data collecting and recording device for vehicles includes a microcontroller, a power supply circuit, a USB interface circuit, a CAN driving circuit, a PT1000 temperature signal conditioning and collecting circuit, a current signal conditioning and collecting circuit, a pulse input conditioning and collecting circuit, a NANDFLASH memory circuit, a ferroelectric memory circuit, a real-time clock circuit, and a watchdog circuit.
A microcontroller: each functional circuit is controlled.
The power supply circuit comprises: and the power supply required by the normal operation of each functional circuit is provided.
The USB interface circuit: and the vehicle data acquisition and recording device is connected with a server, such as a PC (personal computer), so that a communication interface between the vehicle data acquisition and recording device and the server is realized. The communication between the PC and the microcontroller can be completed, commands and data from the PC are sent to the microcontroller, and the data of the microcontroller is uploaded to the PC.
CAN drive circuit: and the communication interface is connected with a CAN bus to realize the communication interface between the vehicle data acquisition and recording device and the CAN bus. The CAN interface signal of the microcontroller is converted into a standard CAN bus signal, and the signal is isolated by adopting an isolation chip, so that the anti-interference capability is improved.
PT1000 temperature signal conditioning acquisition circuit: the temperature sensor is externally connected, working voltage is provided for the temperature sensor, the temperature signal from the temperature sensor is amplified and then subjected to AD conversion, and the temperature signal is collected by the microcontroller through the SPI interface.
The current signal conditioning and collecting circuit comprises: the external connection pressure sensor carries out current-voltage conversion on current signals from the pressure sensor, then carries out AD conversion, and is collected by the microcontroller through the SPI interface.
Pulse input conditioning acquisition circuit: and the external connection mileage sensor is used for filtering and isolating the pulse input signal from the mileage sensor and entering the input end of the microcontroller.
NANDFLASH memory circuit: and storing the acquired sensor data and CAN bus data.
A ferroelectric memory circuit: storing various operation parameter data and caching other data.
Real-time clock circuit: for generating a system time and thus a time stamp for the data recording. In a preferred embodiment, the real time clock circuit also maintains its clock through a battery backup.
Watchdog circuit: the system is used for monitoring the system, and when the abnormity occurs, the system is restored to the normal working state through resetting.
In a preferred embodiment, the microcontroller is implemented by an MC9S12XEP100 single chip microcomputer of FreeScale, a parallel bus interface of the single chip microcomputer is connected with the USB interface circuit, the NandFlash storage circuit and the ferroelectric storage circuit, an SPI interface of the single chip microcomputer is connected with the PT1000 temperature signal conditioning and collecting circuit and the AD converter of the current signal conditioning and collecting circuit, and an I2C interface of the single chip microcomputer is connected with the real-time clock circuit.
The software part of the vehicle data acquisition and recording device comprises two parts of upper computer software and singlechip embedded software. The upper computer software mainly comprises a driving program and data downloading software, the data downloading software is used for downloading data to a PC, and the downloaded data is stored in a file and used for data analysis. The embedded software of the single chip mainly completes the control and data processing of each module.
The shell part of the vehicle data acquisition and recording device is used for mounting and protecting a circuit board and is formed by processing an aluminum alloy material. The maximum external dimension of the shell is as follows: length: 258 mm; width: 145 mm; height 65 mm.
In a preferred embodiment, the main parameters of the vehicle data acquisition and recording device are as follows.
Temperature signal acquisition: 12-way, PT1000 temperature sensor
Pressure signal acquisition: 4-path, 4-20 mA signal
Pulse signal acquisition: 1 channel, signal 0-24V.
CAN communication bus: 2 paths, and CAN meet the CAN 2.0A/B protocol.
A FLASH memory: 512M bytes.
Ferroelectric memory: 128K bytes.
A data downloading interface: full-speed USB, compatible USB 2.0.
A system clock: real time clock + battery backup.
And (3) system monitoring: a separate watchdog.
The utility model provides an automobile-used data acquisition recorder can gather sensor signal, receive bus data and save these data, can follow the USB interface and download data to the PC when needs data, can seek vehicle fault reason through the analysis data, provides fine support for the maintenance of equipment.
Finally, it should be noted that: the above embodiment only illustrates one technical solution of the present disclosure, and although the present disclosure is described in detail by the accompanying drawings and the like, it should be understood by those of ordinary skill in the art that: modifications of some embodiments or equivalents of some of the technical features of the present disclosure may be made without departing from the design concept of the present disclosure, and similar solutions may still fall within the scope of the present disclosure.
Claims (5)
1. A data acquisition recording device for a vehicle is used for acquiring and storing sensor data and CAN bus data at regular time and downloading the data to a server at proper time, and is characterized by comprising the following hardware circuit parts: microcontroller, power supply circuit, USB interface circuit, CAN drive circuit, PT1000 temperature signal conditioning acquisition circuit, current signal conditioning acquisition circuit, pulse input conditioning acquisition circuit, NANDFLASH memory circuit, ferroelectric memory circuit, real-time clock circuit and watchdog circuit, wherein
The microcontroller is used for controlling the power supply circuit, the USB interface circuit, the CAN drive circuit, the PT1000 temperature signal conditioning and collecting circuit, the current signal conditioning and collecting circuit, the pulse input conditioning and collecting circuit, the NANDFLASH storage circuit, the ferroelectric storage circuit, the real-time clock circuit and the watchdog circuit;
the power supply circuit is used for providing power required by normal work of the microcontroller, the USB interface circuit, the CAN drive circuit, the PT1000 temperature signal conditioning and acquiring circuit, the current signal conditioning and acquiring circuit, the pulse input conditioning and acquiring circuit, the NANDFLASH storage circuit, the ferroelectric storage circuit, the real-time clock circuit and the watchdog circuit;
the USB interface circuit is used for being connected with the server to realize a communication interface between the vehicle data acquisition and recording device and the server;
the CAN driving circuit is used for being connected with a CAN bus to realize a communication interface between the vehicle data acquisition and recording device and the CAN bus;
the PT1000 temperature signal conditioning and collecting circuit is used for being externally connected with a temperature sensor, providing working voltage for the temperature sensor, amplifying a temperature signal from the temperature sensor, performing AD conversion, and collecting the temperature signal by the microcontroller through an SPI (serial peripheral interface);
the current signal conditioning and collecting circuit is used for being externally connected with the pressure sensor, carrying out current-voltage conversion on a current signal from the pressure sensor, then carrying out AD conversion on the current signal, and collecting the current signal by the microcontroller through the SPI interface;
the pulse input conditioning acquisition circuit is used for being externally connected with the mileage sensor, filtering and isolating a pulse input signal from the mileage sensor and entering the input end of the microcontroller;
the NANDFLASH storage circuit is used for storing the acquired sensor data and CAN bus data;
the ferroelectric storage circuit is used for storing various operation parameter data and caching the data;
the real-time clock circuit is used for generating system time so as to be used for time marking of data recording;
the watchdog circuit is used for monitoring the system, and when an abnormality occurs, the system is restored to a normal working state through resetting.
2. The data acquisition and recording device for the vehicle as claimed in claim 1, further comprising a housing for mounting and protecting said hardware circuit portion.
3. The vehicle data acquisition and recording device according to claim 1, wherein the CAN driving circuit further comprises an isolation chip for isolating signals on both sides of the CAN driving circuit to improve anti-interference capability.
4. The data acquisition and recording device for the vehicle as claimed in claim 1, wherein the real-time clock circuit also maintains its clock through a battery backup.
5. The data acquisition and recording device according to claim 1, wherein said microcontroller is implemented by a single-chip microcomputer MC9S12XEP100 of FreeScale, a parallel bus interface of which is connected to said USB interface circuit, NandFlash memory circuit and ferroelectric memory circuit, an SPI interface of which is connected to said PT1000 temperature signal conditioning and acquisition circuit and AD converter of said current signal conditioning and acquisition circuit, and an I2C interface of which is connected to said real-time clock circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697635.XU CN210109590U (en) | 2019-05-15 | 2019-05-15 | Data acquisition and recording device for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920697635.XU CN210109590U (en) | 2019-05-15 | 2019-05-15 | Data acquisition and recording device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210109590U true CN210109590U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920697635.XU Active CN210109590U (en) | 2019-05-15 | 2019-05-15 | Data acquisition and recording device for vehicle |
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|---|---|
| CN (1) | CN210109590U (en) |
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2019
- 2019-05-15 CN CN201920697635.XU patent/CN210109590U/en active Active
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