CN105652727A

CN105652727A - Low-cost data acquisition system and acquisition method for station building environment monitoring system

Info

Publication number: CN105652727A
Application number: CN201410640577.9A
Authority: CN
Inventors: 王宁; 李秋霞; 张镝; 周晓磊; 陈海洋; 李论; 南佳龙; 刘卫萍; 王丽丽
Original assignee: Shenyang Institute of Computing Technology of CAS
Current assignee: Shenyang Institute of Computing Technology of CAS
Priority date: 2014-11-13
Filing date: 2014-11-13
Publication date: 2016-06-08

Abstract

The invention relates to a low-cost data acquisition system for a station building environment monitoring system. The low-cost data acquisition system comprises a master control chip, and an RS232 data module, a sensor acquisition module, an alarm circuit and a reset circuit which are connected with the master control chip. The output end of a power supply module is connected with and supplies power to the master control chip, the alarm circuit, the reset circuit, the RS232 data module and the sensor acquisition module, and the input end of the power supply module is connected with a power supply pin in a PCI slot of an industrial control computer. According to the invention, the cost for data acquisition can be decreased, the safety is high, during power drawing through a PCI, a gold finger of the PCI only consumes +12V and +5V, the safety is higher in such a way, and at the same time, the design of two 9-needle interfaces employed by a sensor interface also helps to improve the safety.

Description

Towards low-cost data acquisition system and the collection method of station environmental monitoring system

Technical field

The present invention relates to station environment real time monitoring field, mainly it is used for realizing a kind of method carrying out low cost in data gathering and transmittance process between sensor and master control chip.

Background technology

Existing environmental monitoring website major part is all arranged on machine room unmanned on duty, the running status of equipment must lean on staff regularly to check to scene, so not only waste a large amount of manpowers and material resources, and because adopting and making regular check on the running status that cannot obtain equipment in real time, once equipment breaks down, could find when must wait until that staff reaches the spot, the work mistake that some are unnecessary certainly will be caused.

Therefore having a temperature that can grasp in station in real time, humidity, leak and the system of switch state becomes particularly important, therefore just can be put in industrial computer by collection plates and collect data, industrial computer timing data is uploaded. Industrial computer can only accept the plate card of a kind of PCI formula, and the words cost according to PCI board will improve greatly, and the demand that therefore how can realize this kind of Real-Time Monitoring when low cost is exactly the new problem faced.

Summary of the invention

For solving the problem, it is an object of the invention to provide a kind of system that can carry out data gathering, to humiture, smog, leak, the situation such as light switch carries out data gathering and transmits, the collecting method reduced costs in whole process.

The technical scheme of the present invention is as follows: towards the low-cost data acquisition system of station environmental monitoring system, comprises master control chip and connected RS232 data module, sensor acquisition module, warning circuit, reset circuit; The output terminal of described power supply module is connected with master control chip, warning circuit, reset circuit, RS232 data module, sensor acquisition module and powers, and input terminus is connected with power pins in the PCI slot of industrial computer.

Described RS232 data module is connected with upper computer.

Described sensor acquisition module comprise be connected with master control chip humiture monitoring modular, smoke monitoring module, water leakage monitoring module, light switch control module, and be connected with humiture sensor, smoke transducer, leakage sensor, head light respectively.

Employing PCI slot is powered, it may also be useful to RS232 data module carries out the transfer with upper computer.

Described use RS232 data module carries out the transfer with upper computer and receives the order of upper computer specifically by RS232 data module and the sensing data of collection is transferred to upper computer.

The present invention has following useful effect and advantage:

1. low cost, cost when the main object of the present invention is exactly reduce data gathering, and effective combination of PCI form plate and RS232 transmission data mode just solves these problems.

2. security height, when PCI power taking, the golden finger of PCI only employs+12V and+5V, safer like this, and the design of two 9 needle interfaces that sensor interface adopts simultaneously too increases security.

3. stability is strong, and the selection of humiture, cigarette sense, leakage inductance sensor and signal are all take into account stability in inputting.

4. extensibility is strong, also has two-way switching value sensor circuit for subsequent use, it is possible to expand as required in follow-up work in RS232.

Accompanying drawing explanation

Fig. 1 is the structure principle chart of collection plates of the present invention;

Fig. 2 is transfer schematic circuit of the present invention;

Fig. 3 is inventive sensor interface schema one;

Fig. 4 is inventive sensor interface schema two;

Embodiment

The working order that the present invention mainly realizes the on-the-spot equipment to environmental monitoring sites reflect in real time the staff to environmental monitoring center understanding the humiture of website, leak, smog, light switch situation, thus observe whether equipment can normally run. Can be put in industrial computer by collection plates image data to realize demand, and industrial computer can only accept PCI formula collection plates, if directly using PCI board will greatly increase cost, the present invention just be used to solve realize in the too high problem of cost that runs into.

On sensor is selected, humiture sensor have employed AM2301, there is the signal transmission distance of overlength, adopt numeral input, cigarette sense sensor and leakage inductance sensor adopt relay input to have higher stability, lighting power switch is output control relay module, and each sensor all have employed light-coupled isolation, safer. The interface of outer sensor is adopted two 9 needle interfaces, it is possible to stable be fixed in industrial computer by it, also improve security.

The main purpose of the present invention is the cost reduced in data gathering process, collection plates is drawn as the form of PCI board card when designing, and can directly be inserted in the PCI slot of industrial computer like this, but hardware transport adopts RS232 form, this addresses the problem all problems, and cost also reduces greatly.

As shown in Figure 1, for the functional block diagram of collection plates, data acquisition board has Temperature and Humidity module, smoke monitoring module, water leakage monitoring module, light switch control module, PCI power taking, warning circuit, reset circuit, RS232 data module, they are connected with master control chip, meanwhile, Temperature and Humidity module, smoke monitoring module, water leakage monitoring module, light switch control module by sensor interface respectively with response sensor is connected realize data gathering transmit. .

As shown in Figure 2, according to the interface mode that the distance of industrial computer and collection plates and industrial computer have, in industrial computer, there is built-in RS232, select RS232 interface shape transmission data.

Collection plates adopts 12v to power, and from industrial computer by the power pins of PCI, is connected on this collection plates. Power supply module adopts power supply chip, its input terminus, ground terminal are connected with the power pins of industrial computer PCI, it is parallel with diode and three electric capacity between its input and ground terminal, also it is parallel with two electric capacity between output terminal and ground terminal, between electric capacity and ground, is also connected with inductance.The power supply of cigarette sense sensor and the power requirement of leakage sensor are all+12v, are powered by collection plates. The power requirement of the module of humiture one is 5V, is also that collection plates is powered, and therefore to be added several electric capacity filtering at the supplying unit gathered; safety fuse and direction protection is wanted collection plates and industrial computer to be protected; avoiding because external circuit short circuit, electric current is excessive, burns out control chip.

As shown in Figure 3, for sensor interface, 1,4,9 pins are used for connecing 12V voltage, and 2 pins are used for connecing module of leaking, namely to external leakage sensor, internally connect the process circuit of leakage sensor, 3 pins are as reserved pin, and 7 pins are used for connecing cigarette sense module, to external cigarette sense sensor, internally connecing the process circuit of cigarette sense sensor, 5,6,8 pins are used for connecing in analog. What cigarette sense sensor and leakage sensor exported is all switching value, is a high level signal, after signal is come in, inventive design TLP521 light-coupled isolation device is isolated, and makes it to gather front end completely isolated with collection plates, and object is increase security, reduce circuit interference, simplify circuit layout. The control pin PD6 of control lamp, adds pull-up resistor, avoids big voltage to damage control chip.

As shown in Figure 4, being equally also 9 needle interfaces in sensor interface, 1 pin is used for connection+12V, at this, 2 pins is set to spare interface, can for expanding afterwards, 3 pins connect PB5,7 pin and meet PD6,4,9 pins meet VCC, and 5,8 pins connect digitally, and 6 pins are used for connecing in analog.

Claims

1., towards the low-cost data acquisition system of station environmental monitoring system, comprise master control chip and connected RS232 data module, sensor acquisition module, warning circuit, reset circuit; It is characterized in that: the output terminal of described power supply module is connected with master control chip, warning circuit, reset circuit, RS232 data module, sensor acquisition module and powers, and input terminus is connected with power pins in the PCI slot of industrial computer.

2. by the low-cost data acquisition system towards station environmental monitoring system according to claim 1, it is characterised in that described RS232 data module is connected with upper computer.

3. by the low-cost data acquisition system towards station environmental monitoring system according to claim 1, it is characterized in that described sensor acquisition module comprise be connected with master control chip humiture monitoring modular, smoke monitoring module, water leakage monitoring module, light switch control module, and be connected with humiture sensor, smoke transducer, leakage sensor, head light respectively.

4. towards the low-cost data collection method of station environmental monitoring system, it is characterised in that adopt PCI slot to power, it may also be useful to RS232 data module carries out the transfer with upper computer.

5. towards the low-cost data collection method of station environmental monitoring system, it is characterised in that described use RS232 data module carries out the transfer with upper computer and receives the order of upper computer specifically by RS232 data module and the sensing data of collection is transferred to upper computer.