CN201116934Y

CN201116934Y - Meteorological sensor data acquisition system

Info

Publication number: CN201116934Y
Application number: CNU2007201572592U
Authority: CN
Inventors: 宋文杰; 漆随平; 王平; 于慧彬; 李小峰; 石彦平; 初伟先; 王东明
Original assignee: Oceanographic Instrumentation Research Institute Shandong Academy of Sciences
Current assignee: Oceanographic Instrumentation Research Institute Shandong Academy of Sciences
Priority date: 2007-11-13
Filing date: 2007-11-13
Publication date: 2008-09-17
Anticipated expiration: 2017-11-13

Abstract

The utility model relates to a meteorological sensor data acquisition system, which comprises a meteorological sensor and a main processor. The meteorological sensor data acquisition system is characterized in that a sensor which outputs analog signals is connected with an analogue/digital conversion pathway through a voltage or current selective circuit in the meteorological sensor, the analogue/digital conversion pathway transforms the analog signals into digital signals and then is connected with the main processor through a data bus, the main processer is connected with a CAN bus control transmitting and receiving circuit, the digital signals which are received are transformed into CAN bus data through the CAN bus control transmitting and receiving circuit, and thereby the main processer is communicated with an upper industrial control computer through a CNA bus, and the sensor which outputs serial digital signals processes the pathway through a serial data interface and thereby is connected with the main processer through the data bus. The utility model realizes the compatibility of different signal sensors, the system is little disturbed and affected by scenes and can be used in complex and hostile environment, and the system has the characteristic of reliable data transmission.

Description

The meteorological sensor data acquisition system (DAS)

Technical field

The utility model belongs to meteorological field, specifically, relates to a kind of meteorological sensor signal data acquisition disposal system.

Background technology

About the rainfall measurement mechanism many relevant patents are arranged at home; although these patent structures are different; but ultimate principle all only be tipping bucket type, hydrocone type and on this basis of two kinds at the improved procedure of aspects such as structure or control mode; there is following defective in the rainfall amount measurement mechanism in the above-mentioned patent: at sea on buoy, naval vessel or the sea base station; because the fluctuation of wave; be very easy to make tipping bucket mistake upset, and strong wind or when raining heavyly tipping bucket cause measuring inaccurate easily because of having little time to overturn.Though siphon rainfall recorder can be used on buoy, naval vessel, but also there is following deficiency: in strong wind, be not vertical landing or make rainwater accept face to be in non-standard state, to cause a considerable amount of rainwater not collected effectively in the rain trap because of buoy rocks because of raindrop; Siphonic process needs the time, and the rainfall in siphonic process is run off in the lump, produces the loss error of precipitation, and precipitation intensity is big more, and error is big more; At sea in the hot environment, the rain of collecting can be evaporated in a large number, causes than mistake; The measurement range is little, generally at 0～4mm/min, all can not monitor heavy rain and heavy rain; Often be mistakened as quantity of precipitation when having wave to hit sensor and quote data; Be easy to generate rain trap overflow or U trap and block, influence is normally measured.

For solving these deficiencies, marine environmental monitoring, the marine quantity of precipitation novel sensor that climatic elements Study of Monitoring person meet the demands in exploitation always, maritime meteorology key element area monitoring sensor is in basic technical indicator contentedly under the condition, to microminiaturization, intelligent, digitizing, integrated, low-power consumption and multifunction direction develop, and exploitation has high sensitivity, high precision, high response speed, high s/n ratio, high reliability, the multi-parameter sensor of atomic small size of high tenable environment ability and weight has become the inexorable trend in detection and automated arm field thereof.In the maritime meteorology sensing system, data acquisition system (DAS) plays crucial effects, there is following defective in existing data acquisition system (DAS): 1, poor compatibility, gather different signal demands and change different acquisition systems, improved use cost on the one hand, made troubles to the user on the other hand; 2, anti-interference is poor, and the test site strong in some interference can't shield it specially, thereby can cause the data distortion gathered.

Summary of the invention

Goal of the invention of the present utility model is to provide a cover compatible strong data acquisition system (DAS) for the meteorological sensor device that measures the amount of rainfall.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:

A kind of meteorological sensor data acquisition system (DAS), comprise meteorological sensor and primary processor, it is characterized in that: in the described meteorological sensor, the sensor of output simulating signal is selected circuit connection mode number conversion path by voltage/current, is to connect described primary processor by data bus after the digital signal with analog signal conversion; Described primary processor connects the total line traffic control transmission circuit of CAN, converts the digital signal that receives to the CAN bus data by the total line traffic control transmission circuit of described CAN, and then communicates through CAN bus and upper industrial computer; The sensor of output serial digital signal is handled path by serial data interface, and then connects described primary processor through data bus.

Simply, the output of the sensor of described output simulating signal is joined with the analog to digital conversion path on the one hand by exclusion, on the other hand by resistance grounded behind the switching device.

Further, in described analog to digital conversion path, include analog switching circuit, A/D change-over circuit, photoelectric isolating circuit and signal latch circuit; Wherein, after the simulating signal of sensor output is carried out the passage switching by analog switch, the input end that connects the A/D change-over circuit through signal adjustment circuit, analog signal conversion become after the digital signal connect photoelectric isolating circuit by its output terminal, and then after by signal latch circuit digital signal being latched, output in the described primary processor by data bus; Described primary processor sends control signal connects described A/D change-over circuit and analog switching circuit by control bus control end.

Described signal adjustment circuit comprises one or four operational amplification circuits, and the input end of described amplifying circuit links to each other with the analog switch output circuit, and output terminal connects the input end of A/D change-over circuit.

In order to eliminate interference, in described serial data interface treatment circuit, include the high speed optoelectronic buffer circuit, sensor is carried out the photoelectricity isolation processing by the serial data of serial ports input after, output in the described primary processor by data bus.

In order to select flexibly the serial data treatment circuit, described serial data treatment circuit comprises one tunnel described treatment circuit at least, and described each road treatment circuit is selected to be connected or to disconnect by wire jumper between sensor and primary processor.

In order to increase the reliability of the total line traffic control transmission circuit output of CAN, the total line traffic control transmission circuit of described CAN comprises the total line traffic control transmission circuit of two-way CAN, the data transmission terminal of described primary processor connects the single output data port of many inputs of CAN transceiver, the CAN bus port of described CAN converter connects upper industrial computer by the CAN bus, realizes the conversion between Transistor-Transistor Logic level data and the CAN bus data.

In order to improve system performance and processing speed, described primary processor is the ARM9 flush bonding processor, its address signal end and data-signal end respectively with corresponding connection of respective pin of program storage and data-carrier store.

Compared with prior art, advantage of the present utility model and good effect are as follows: 1, is connected voltage/current selection circuit between meteorological sensor output and the ground, when the meteorological sensor output voltage signal, do not select this circuit, when the meteorological sensor output current signal, foregoing circuit is converted to voltage signal with current signal, has effectively realized the compatibility of unlike signal sensor; 2, CAN bus transmission circuit adopts two Redundancy Design, when the total line traffic control transmission circuit of one road CAN breaks down, automatically switches to another road output, increases the reliability of the total line traffic control transmission circuit output of CAN; 3, select to be connected or to disconnect by wire jumper between the multichannel treatment circuit of serial data treatment circuit and the primary processor, realized the purpose of flexible selection serial data circuit; 4, be subjected to on-the-spot disturbing effect little, can be used for having the data transmission reliable characteristics in the complicated rugged surroundings.

Description of drawings

Fig. 1 is the utility model data acquisition system (DAS) theory diagram;

Fig. 2 is the main processor circuit structure principle chart;

Fig. 3 is the data acquisition circuit schematic diagram;

Fig. 4 is the total line traffic control transmission circuit of a CAN schematic diagram;

Fig. 5 is a serial data treatment circuit schematic diagram;

Fig. 6 is the memory circuit schematic diagram.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

As shown in Figure 1, a kind of meteorological sensor data acquisition system (DAS), comprise meteorological sensor and primary processor, it is characterized in that: in the described meteorological sensor, the sensor of output simulating signal connects voltage/current and selects circuit, if the signal from sensor is a current signal, then connect and select circuit, convert current signal to voltage signal through change-over circuit, be connected to the analog to digital conversion path then, if be voltage signal, then without above-mentioned selection circuit from the signal of sensor, but being directly connected to the analog to digital conversion path, the analog to digital conversion path is to connect described primary processor by data bus after the digital signal with analog signal conversion; Described primary processor connects the total line traffic control transmission circuit of CAN, converts the digital signal that receives to the CAN bus data by the total line traffic control transmission circuit of described CAN, and then communicates through CAN bus and upper industrial computer; The sensor of output serial digital signal is handled path by serial data interface, and then connects described primary processor through data bus.

As Fig. 2-shown in Figure 6, for the sensor to various output signals is realized versatility, the sensor output of output simulating signal is joined with the analog to digital conversion path on the one hand by exclusion, on the other hand by resistance grounded behind the switching device.

The analog to digital conversion path comprises analog switching circuit, signal adjustment circuit, A/D change-over circuit, photoelectric isolating circuit and signal latch circuit; Wherein, after the simulating signal of sensor output is carried out the passage switching by analog switch, and then connect the input end of A/D change-over circuit through signal adjustment circuit, analog signal conversion become after the digital signal connect photoelectric isolating circuit by its output terminal, and then after by signal latch circuit digital signal being latched, output in the described primary processor by data bus; Described primary processor sends control signal and connects the control end of described A/D change-over circuit and analog switching circuit by control bus, controls its work schedule.Described primary processor is ARM9 flush bonding processor AT91RM9200, and its address signal end A0～A25 and data-signal end PC0～PC15, D17～D31 are respectively by address bus A[0...25] with data bus D[0...31] with respective pin corresponding be connected of program storage FLASH chip HY57V561620 with data-carrier store SDRAM chip SST39VF6401-70-4C-EK.

In the serial line interface data processing circuit, include the high speed optoelectronic buffer circuit, primary processor is carried out the photoelectricity isolation processing by the serial data of serial ports input after, by data bus and upper industrial computer communication.The serial data treatment circuit can comprise multichannel interface treatment circuit, as RS422 interface, RS232 interface, RS485 interface, each interface can be chosen in being connected or disconnection between peripheral hardware and the primary processor by wire jumper, as for how to arrange and select wire jumper is those skilled in the art's common practise, thereby do not describe in detail herein, in addition, Fig. 5 only shows RS422 interface principle figure, and other are not shown.

As shown in Figure 4, the total line traffic control transmission circuit of CAN comprises two groups of transmission circuits, the clock end SCK of each group CAN transceiver, sheet choosing end/CS, the single output data port SO of many inputs imports multi-output data port SI by the data transmission terminal PA[0...31 of bus with the ARM9 flush bonding processor with list] link to each other, the ARM9 flush bonding processor is by data line PC[0...15] to each group CAN transceiver /IN end output look-at-me, the two-way CAN bus port CANH of CAN converter, CANL connects upper industrial computer by the CAN bus, realizes the conversion between Transistor-Transistor Logic level data and the CAN bus data.When one road CAN bus transmission circuit breaks down, under the control of internal processes, automatically switch to another road CAN bus transmission circuit, above-mentioned pair of Redundancy Design increased the reliability of circuit greatly.

Claims

1, a kind of meteorological sensor data acquisition system (DAS), comprise meteorological sensor and primary processor, it is characterized in that: in the described meteorological sensor, the sensor of output simulating signal is selected circuit connection mode number conversion path by voltage/current, is to connect described primary processor by data bus after the digital signal with analog signal conversion; Described primary processor connects the total line traffic control transmission circuit of CAN, converts the digital signal that receives to the CAN bus data by the total line traffic control transmission circuit of described CAN, and then communicates through CAN bus and upper industrial computer; The sensor of output serial digital signal is handled path by serial data interface, and then connects described primary processor through data bus.

2. meteorological sensor data acquisition system (DAS) according to claim 1 is characterized in that: the sensor output of described output simulating signal is joined with the analog to digital conversion path on the one hand by exclusion, on the other hand by resistance grounded behind the switching device.

3. meteorological sensor data acquisition system (DAS) according to claim 1 and 2 is characterized in that: include analog switching circuit, A/D change-over circuit, photoelectric isolating circuit and signal latch circuit in described analog to digital conversion path; Wherein, after the simulating signal of sensor output is carried out the passage switching by analog switch, the input end that connects the A/D change-over circuit through signal adjustment circuit, analog signal conversion become after the digital signal connect photoelectric isolating circuit by its output terminal, and then after by signal latch circuit digital signal being latched, by data, bus outputs in the described primary processor; Described primary processor sends control signal connects described A/D change-over circuit and analog switching circuit by control bus control end.

4. meteorological sensor data acquisition system (DAS) according to claim 3, it is characterized in that: described signal adjustment circuit comprises one or four operational amplification circuits, the input end of described amplifying circuit links to each other with the analog switch output circuit, and output terminal connects the input end of A/D change-over circuit.

5. according to claim 1,2 or 3 described meteorological sensor data acquisition system (DAS)s, it is characterized in that: in described serial data interface treatment circuit, include the high speed optoelectronic buffer circuit, after sensor carried out the photoelectricity isolation processing by the serial data of serial ports input, output in the described primary processor by data bus.

6, meteorological sensor data acquisition system (DAS) according to claim 5, it is characterized in that: described serial data treatment circuit comprises one tunnel described treatment circuit at least, and described each road treatment circuit is selected to be connected or to disconnect by wire jumper between sensor and primary processor.

7. meteorological sensor data acquisition system (DAS) according to claim 6, it is characterized in that: the total line traffic control transmission circuit of described CAN comprises two-way CAN, total line traffic control transmission circuit, the data transmission terminal of described primary processor connects the single output data port of many inputs of CAN transceiver, the CAN bus port of described CAN converter connects upper industrial computer by the CAN bus, realizes the conversion between Transistor-Transistor Logic level data and the CAN bus data.

8. meteorological sensor data acquisition system (DAS) according to claim 7 is characterized in that: described primary processor is the ARM9 flush bonding processor, its address signal end and data-signal end respectively with corresponding connection of respective pin of program storage and data-carrier store.