CN204515159U

CN204515159U - Offshore shooting instrument data acquisition node multi-channel data acquisition unit

Info

Publication number: CN204515159U
Application number: CN201520065496.0U
Authority: CN
Inventors: 张志利; 张莹; 万钧; 郭肖鹏; 张建新; 朱尚远; 窦红兵
Original assignee: Tianjin Sino German Vocational Technical College
Current assignee: Tianjin Sino German Vocational Technical College
Priority date: 2015-01-30
Filing date: 2015-01-30
Publication date: 2015-07-29
Anticipated expiration: 2025-01-30

Abstract

The utility model relates to the detection field of optical signal power, in particular to a kind of offshore shooting instrument data acquisition node multi-channel data acquisition unit, comprise main control chip and data acquisition chip, described main control chip is connected by spi bus with described data acquisition chip, the EP4CE22 chip that described main control chip adopts ALTERA company to produce, the ADS1282 chip that described data acquisition chip adopts TI company to produce, described EP4CE22 chip controls ADS1282 chip described in 24 tunnels by SPI interface simultaneously.Adopt FPGA as main control chip, inside can integrated multiple SPI interface, and all SPI interfaces share same clock line, can realize the synchronous acquisition of multi-channel data.Adopt the ADS1282 of TI company production as data acquisition chip, reduce quantity and the power consumption of acquisition chip, be beneficial to the miniaturization realizing data acquisition node.

Description

Offshore shooting instrument data acquisition node multi-channel data acquisition unit

Technical field

The utility model relates to offshore shooting device technique field, particularly a kind of offshore shooting instrument data acquisition node multi-channel data acquisition unit.

Background technology

Data acquisition node is the ingredient of the most critical of offshore shooting instrument, and the volume of data acquisition node directly affects the diameter of towing cable, and the power consumption of data acquisition node directly affects the parameter index of electric power system.Data acquisition node is made up of data collector and data transmission device, the responsible geology seismic signal gathering and transmit the inner nautical receiving set of oil-filled cable and receive.

At present, 24 earthquake data acquisition nest plates that the offshore shooting instrument data collector of domestic and international main flow adopts Cirrus Logic company of the U.S. to produce mostly, comprise prime amplifier CS3301A, 24 A/D converter CS5372A and digital filtering chip CS5376A.Be characterized in that specificity is good, the construction cycle is short.Its shortcoming: one is that number of chips is many, volume is large, is unfavorable for instrument miniaturization; Two is that power consumption is higher, and large ocean seismic prospecting instrument requires higher to electric power system.

Utility model content

The purpose of this utility model is the deficiency overcoming above-mentioned technology, and provides a kind of offshore shooting instrument data acquisition node multi-channel data acquisition unit, reduces volume and the power consumption of data acquisition node data collector.

The utility model for achieving the above object, by the following technical solutions:

A kind of offshore shooting instrument data acquisition node multi-channel data acquisition unit, it is characterized in that: comprise main control chip and data acquisition chip, described main control chip is connected by spi bus with described data acquisition chip, the EP4CE22 chip that described main control chip adopts ALTERA company to produce, the ADS1282 chip that described data acquisition chip adopts TI company to produce, described EP4CE22 chip controls ADS1282 chip described in 24 tunnels by SPI interface simultaneously.

Preferably, described main control chip comprises synchronous clock processing module, command reception processing module, data cache module and data acquisition module, described synchronous clock processing module receives the clock information that host computer sends, recover 4.096MHz, be supplied to described ADS1282 chip as work clock simultaneously; Described command reception processing module receives the instruction that host computer sends over, and by the sample frequency of ADS1282 described in SPI Interface Controller, programming amplifying multiple, extracts interval, synchronous reset; Described data acquisition module, by the data of ADS1282 chip described in SPI module acquires 24 tunnel, forms the word of 32 according to the order that time rule is good, be stored in described data cache module according to the order of regulation; Described data cache module adopts ping pong scheme, and 2 pieces of storage spaces use in turn, waits for that data transmission device transfers to host computer by after digital independent.

The beneficial effects of the utility model are: 1, adopt FPGA as main control chip, inside can integrated multiple SPI interface, and all SPI interfaces share same clock line, can realize the synchronous acquisition of multi-channel data.2, the ADS1282 adopting TI company to produce, as data acquisition chip, reduces quantity and the power consumption of acquisition chip, is beneficial to the miniaturization realizing data acquisition node.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the inner structure schematic diagram of main control chip;

Fig. 3 offshore shooting instrument connection diagram.

Embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Fig. 1 Fig. 2 Fig. 3.The utility model embodiment is as follows:

1, as shown in Figure 1, a kind of offshore shooting instrument data acquisition node multi-channel data acquisition unit, it is characterized in that: comprise main control chip and data acquisition chip, described main control chip is connected by spi bus with described data acquisition chip, the EP4CE22 chip that described main control chip adopts ALTERA company to produce, the ADS1282 chip that described data acquisition chip adopts TI company to produce, described EP4CE22 chip controls ADS1282 chip described in 24 tunnels by SPI interface simultaneously.24 road SPI interfaces share 1 clock line, ensure 24 road ADS1282 synchronous workings.

As shown in Figure 2, main control chip inter-sync clock processing module receives the clock information that host computer sends, and recovers 4.096MHz, is supplied to 24 road ADS1282 as work clock simultaneously.Command reception processing module receives the instruction that host computer sends over, and by the sample frequency of SPI Interface Controller ADS1282, programming amplifying multiple, extracts interval, synchronous reset etc.Data acquisition and control module, by the data of SPI module acquires 24 road ADS1282, forms the word of 32 according to the order that time rule is good, be stored in data cache module according to the order of regulation.Data cache module adopts ping pong scheme, and 2 pieces of storage spaces use in turn, waits for that data transmission device transfers to host computer by after digital independent.

As shown in Figure 3, system is composed in series by host computer, data acquisition node, and data acquisition node contains data transmission device and data collector.

The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. an offshore shooting instrument data acquisition node multi-channel data acquisition unit, it is characterized in that: comprise main control chip and data acquisition chip, described main control chip is connected by spi bus with described data acquisition chip, the EP4CE22 chip that described main control chip adopts ALTERA company to produce, the ADS1282 chip that described data acquisition chip adopts TI company to produce, described EP4CE22 chip controls ADS1282 chip described in 24 tunnels by SPI interface simultaneously.

2. offshore shooting instrument data acquisition node multi-channel data acquisition unit according to claim 1, it is characterized in that: described main control chip comprises synchronous clock processing module, command reception processing module, data cache module and data acquisition module, described synchronous clock processing module receives the clock information that host computer sends, recover 4.096MHz, be supplied to described ADS1282 chip as work clock simultaneously; Described command reception processing module receives the instruction that host computer sends over, and by the sample frequency of ADS1282 described in SPI Interface Controller, programming amplifying multiple, extracts interval, synchronous reset; Described data acquisition module, by the data of ADS1282 chip described in SPI module acquires 24 tunnel, forms the word of 32 according to the order that time rule is good, be stored in described data cache module according to the order of regulation; Described data cache module adopts ping pong scheme, and 2 pieces of storage spaces use in turn, waits for that data transmission device transfers to host computer by after digital independent.