CN103217592A

CN103217592A - Electronic recording system

Info

Publication number: CN103217592A
Application number: CN2012100182405A
Authority: CN
Inventors: 唐喜宝; 单永志; 蔡德宇; 韩旭东; 董涛; 朱凯; 董立刚; 徐振宇
Original assignee: Harbin Jiancheng Group Co Ltd
Current assignee: Harbin Jiancheng Group Co Ltd
Priority date: 2012-01-20
Filing date: 2012-01-20
Publication date: 2013-07-24

Abstract

The invention relates to an electronic recording system and belongs to the electronic technical field. The electronic recording system comprises a secondary power circuit, a main control circuit, a storage circuit, a FiFo asynchronous communication circuit, a universal serial bus (USB) communication circuit and a modulation sampling circuit. The secondary power circuit is connected with an external power source and connected with other circuits through power lines. The main control circuit, the storage circuit, the FiFo asynchronous communication circuit, the USB communication circuit and the modulation sampling circuit are connected through address data buses. The modulation sampling circuit is connected to analog quantity of a tested product system, and the FiFo asynchronous communication circuit is connected to digital quantity of the tested product system. The USB communication circuit is connected to an upper computer through a USB bus. The electronic recording system provides a new testing measure of a product system, can measure the product system and store data fast and conveniently and is beneficial to joint debugging of the product system.

Description

A kind of electronic recording system

Technical field

The present invention relates to a kind of electronic recording system, belong to electronic technology field.

Background technology

Product systems all need to carry out a large amount of test missions in typing as last, with every function of checking product systems.Because the complicacy of product systems is accompanied by lot of data and measures the interpretation task in process of the test.Present stage, the work of DATA REASONING, interpretation, record is mainly finished by manual, and manual mode more and more can't satisfy the demand of increasingly sophisticated product systems.

Summary of the invention

The objective of the invention is defective, a kind of electronic surveying fast, easily, register system are provided at prior art.

A kind of electronic recording system provided by the invention, comprise secondary power supply circuit, main control circuit, memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, modulation sample circuit, wherein the secondary power supply circuit is connected to external power supply, and with other each circuit between be connected by power lead; Be connected by address data bus between main control circuit and memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, the modulation sample circuit; The modulation sample circuit is connected to the analog quantity of test products system of institute by data line; FiFo asynchronous communication circuit is connected to the digital quantity of test products system of institute by data line; The USB communicating circuit is connected to host computer by usb bus.

Beneficial effect

The present invention provides a kind of new means of testing for product systems, and the measurement of carrying out product systems and data storage that can be easily and fast help the uniting and adjustment debugging of product systems.

Description of drawings

Fig. 1 is electronic recording system modular structure figure.

Fig. 2 is the memory circuitry structural drawing among the embodiment.

Fig. 3 is the FIFO asynchronous communication circuit structure diagram among the embodiment.

Fig. 4 is the USB communicating circuit structural drawing among the embodiment.

Fig. 5 is the electronic recording system workflow diagram among the embodiment.

Embodiment

Below in conjunction with drawings and Examples the present invention is described in further details.

Present embodiment is a kind of electronic recorder of realizing according to the present invention.As shown in Figure 1, electronic recorder comprises secondary power supply circuit, main control circuit, memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, modulation sample circuit, wherein the secondary power supply circuit is connected to external power supply, and with other each circuit between be connected by power lead; Be connected by address data bus between main control circuit and memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, the modulation sample circuit; The modulation sample circuit is connected to the analog quantity of test products system of institute; FiFo asynchronous communication circuit is connected to the digital quantity of test products system of institute; The USB communicating circuit is connected to host computer by usb bus.

Among the embodiment, analog quantity adopts the analog channel of 48 tunnel 10 bit resolutions; Operating voltage is 28.5V ± 3.5V, adopts 3.7V lithium battery parallel powering simultaneously; The digital quantity communication interface is an intelligence interface, and communication interface adopts the RS422 interface of band protection and quarantine measures, speed 204.8kbps.Electronic recording system is provided with two RS422 interfaces, can write down the data that two-way is sent here by the RS422 port simultaneously, every road band 256 byte datas buffering; Registering instrument and host computer interface adopt usb bus, the memory capacity 1G byte of registering instrument; Registering instrument can be gathered the analog quantity and the digital quantity of product test system, and can store, understands internal data, and offers host computer, finally analyzes with form or graphics mode.

The function of secondary power supply circuit is: the power supply of product systems power supply needs the 5V supply voltage for 28V voltage electronic recording system, electronic recorder inside can connect lithium battery power supply simultaneously, and the secondary power supply circuit adopts the insulating power supply power supply simultaneously of direct current DC module converts supply voltage.Give core CPU for two-way power supply parallel powering, the secondary power supply circuit has been selected the power management chip of low pressure reduction for use, possesses the power down warning function simultaneously, and the power supply of assurance system is normal.Around CPU, designed simultaneously a large amount of lotus root electric capacity that move back, guaranteed that chip power supply is reliable and stable.

The main control circuit of electronic recording system is selected the LPC2478 chip of the Arm structure of NXP company for use, the LPC2478 microcontroller has high speed Flash storer in the 512kB sheet, this Flash storer has the memory interface and the accelerator architecture of 128 special bit widths, can make CPU to carry out the instruction of Flash storer in order up to the system clock speed of 72MHz.This chip has a large amount of peripheral interfaces and contains the address space of a 4GB, 4 low-power consumption modes simultaneously: free time, sleep, power down and degree of depth power down, power consumption can be dropped to very lowly, and increase System production time.

The memory circuit of electronic recording system adopts high capacity Flash circuit, and capacity can reach the 1G byte, and electronic recording system adopts the algorithm of CRC (cyclic redundancy check (CRC) code) to guarantee that data storage reads correctly.4 hours digital quantity of product systems 2 tunnel 422 interfaces is not more than the data capacity of 100M byte, and 4 hours digital quantity of analog quantity sampling also is not more than the 100M byte.The Flash that selects for use among the embodiment is the k9k8G08 chip of 1G byte Samsung, and the every byte of this chip-stored speed is n level second, and volume is little in light weight, and control is convenient.Among the embodiment, this chip is received on the CS1 space on the main control chip external memory controller (EMC) of main control circuit, the concrete connection seen accompanying drawing 2.

The FIFO asynchronous communication circuit of electronic recording system adopts the SC28L202 chip, because registering instrument adopts the information of two-way 422, if, work as two paths of signals so and arrive CPU simultaneously with common asynchronous serial port, a large amount of resources will be taken, and not drop-out can not be guaranteed.The SC28L202 chip is a chip that has 8 full duplex asynchronous passage UART, and the receiver of each UART passage and transmitter all have the FIFO of the 256 byte degree of depth.Each UART passage of chip is except basic asynchronous communication function, also can realize software flow control (in-band flow control), hardware flow control (out-of-band flow control) and multiple spot pattern (awakening mode or RS-485 pattern) etc., each UART has 4 I/O pins that extend out simultaneously, and each extends out the I/O pin all is multiplexing functions.

Chip provides 22 selectable baud rates for transmitter and the receiver of each passage UART, and transmitter and receiver also can be selected any baud rate by Baud rate generator generation able to programme.Receiver can be selected different baud rates independently with transmitter, and this makes chip be particularly suitable for the application of dual rate full-duplex channel.The FIFO of 256 bytes, and the software flow of chip is controlled and hardware flow control makes the overflow error of receiver significantly reduce.Because main control computer and integrated navigation are 422 buses, increase by 2 SP3490E chips for translation-protocol is special.The concrete connection seen accompanying drawing 3.

Data are read for convenience, the USB communicating circuit of electronic recorder has adopted the cy7c68013 chip of Cypress company, and main control chip has a USB interface, but through actual test proof, the USB interface of main control chip is the full speed interface, does not reach designing requirement.The cy7c68013 chip is supported high-speed interface, meets the demands through actual measurement speed.This chip also has simultaneously, and interface is convenient, built-in agreement.To the kit that the software development of USB has adopted Cypress company to provide, the interface that has adopted kit to provide drives, and host computer has been developed application program on the basis that interface drives.The concrete connection seen accompanying drawing 4.

The modulation sample circuit of registering instrument adopts 10 ADC, and by the analog switch switching channel, analog channel has been selected 3 ADG506 chips, amounts to 48 tunnel analog channels, and front end adopts the TL0641 modulating input signal in 3V simultaneously.The analog channel sampling is a periodic sampling with 5ms.

The major function of electronic recorder is the numeral and the analog information of record product system.Total system is divided into two stages, and in first record stage in stage, electronic recording system mainly is responsible for record in this stage.Second stage mainly is responsible for reading the data that are stored in the chip.In first stage, after the product systems power supply, electronic recorder is judged, if be system's power supply, then begin with 30 milliseconds be the periodic sampling analog information, receive digital information simultaneously, in one-period, product simulation amount and digital quantity are combined into a package informatin and store in the storage chip, the register system maximum can write down four hours data, and process flow diagram is seen accompanying drawing 5.Second stage, host computer is given power devices by usb bus, logging recorder system waits for that host computer provides read instruction, when logging recorder system is received the instruction that host computer provides, read the information of storage chip, be transferred to host computer by usb bus, by storing in the host computer hard disk after the algorithm decoding and showing, process flow diagram is seen Fig. 5 to upper computer software data message.

The above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement; perhaps part technical characterictic wherein is equal to replacement, these improvement and replace and also should be considered as protection scope of the present invention.

Claims

1. electronic recording system, it is characterized in that, comprise secondary power supply circuit, main control circuit, memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, modulation sample circuit, wherein the secondary power supply circuit is connected to external power supply, and with other each circuit between be connected by power lead; Be connected by address data bus between main control circuit and memory circuit, FiFo asynchronous communication circuit, USB communicating circuit, the modulation sample circuit; The modulation sample circuit is connected to the analog quantity of test products system of institute by data line; FiFo asynchronous communication circuit is connected to the digital quantity of test products system of institute by data line; The USB communicating circuit is connected to host computer by usb bus.

2. a kind of electronic recording system according to claim 1 is characterized in that, the communication interface between the digital quantity of FiFo asynchronous communication circuit and test products system of institute is two RS422 interfaces.

3. a kind of electronic recording system according to claim 2, it is characterized in that, main control circuit is selected the LPC2478 chip of the Arm structure of NXP company for use, memory circuit adopts the k9k8G08 chip of 1G byte Samsung, FIFO asynchronous communication circuit adopts the SC28L202 chip, and the USB communicating circuit has adopted the cy7c68013 chip of Cypress company.