CN201837606U - Online monitor for dew point and density of sulfur hexafluoride - Google Patents
Online monitor for dew point and density of sulfur hexafluoride Download PDFInfo
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- CN201837606U CN201837606U CN2010205899919U CN201020589991U CN201837606U CN 201837606 U CN201837606 U CN 201837606U CN 2010205899919 U CN2010205899919 U CN 2010205899919U CN 201020589991 U CN201020589991 U CN 201020589991U CN 201837606 U CN201837606 U CN 201837606U
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- microprocessor
- density
- sulfur hexafluoride
- dew point
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Abstract
The utility model provides an online monitor for dew point and density of sulfur hexafluoride. The online monitor is characterized in that: the online monitor comprises a microprocessor, a power supply module, a temperature and humidity sensor, a pressure sensor, a clock module and a display, wherein the power supply module is connected with the power ports of all the other modules; the temperature and humidity sensor, the pressure sensor and the clock module are connected with an I/O interface of the microprocessor, and the display is connected with the microprocessor by a man-machine interface circuit. The microprocessor sends out a data acquisition command, the temperature and humidity sensor and the pressure sensor are used for acquiring the current temperature, humidity and pressure value of the sulfur hexafluoride, after the microprocessor sends out a data reading command, the sensors transmit the acquired data to the microprocessor, and the microprocessor acquires the time of the clock module and records the time of acquiring the data simultaneously, and then the dew point and density value can be calculated after the data are processed by the microprocessor, and the relevant data are displayed by a liquid crystal display.
Description
Technical field
The utility model relates to the on-line monitoring instrument, relates in particular to a kind of sulfur hexafluoride dew point and density on-line monitoring instrument.
Background technology
Along with sulfur hexafluoride (hereinafter to be referred as SF6) high voltage electric equipment is increasing in the use amount of China, in order to guarantee the stability of electrical equipment, the equipment that prevents breaks down because of SF6 gas contains impurity, needs the dew point and the density of monitoring SF6 gas in real time.
Pure SF6 gas is one of indispensable insulating medium in the electric system because of it has good insulating property and stable arc quenching characteristic.As electrical equipment being used the regulation of insulating oil and being required, electrical system has also been made strict regulation and requirement for the SF6 gas in the electrical equipment, and the water cut in the new gas of China regulation SF6 must not be higher than 8 * 10
-6(mass ratio).Gas water content can represent that to a certain extent dew point is a special temperature value with gas dew point, is the minimum temperature that gas keeps certain certain humidity to reach.When the temperature of gas was lower than dew point, gas did not hold too much moisture, and these moisture can become mist, dew or frost.Therefore, just can learn the water cut of gas by the dew point of monitoring gas.
At present, mostly the monitoring method of SF6 gas density is to adopt the mechanical type density monitor to realize that the mechanical type density monitor can't be monitored in real time to change procedure.In engineering is used, the direct monitoring of density is not easy to realize, normally be converted to monitoring to pressure, even but given volume, pressure also is can be along with temperature variation.
The utility model content
The technical problems to be solved in the utility model is: at the deficiencies in the prior art, provide that a kind of measuring speed is fast, stability and good reproducibility, make things convenient for on-line monitoring and portable type measuring sulfur hexafluoride dew point and density on-line monitoring instrument.
The technical scheme that the utility model on-line monitoring instrument is adopted is: a kind of sulfur hexafluoride dew point and density on-line monitoring instrument is characterized in that: it comprises microprocessor, supply module, Temperature Humidity Sensor, pressure transducer, clock module and display; Wherein the power end of all modules of supply module and other connects; Temperature Humidity Sensor, pressure transducer and clock module connect with the I/O interface of microprocessor; Display connects by the man-machine interface circuit with microprocessor.
Press such scheme, it also comprises the input equipment that connects with the I/O interface of described microprocessor.Input equipment is used to be provided with the correlation parameter of this on-line monitoring instrument, and can switch the running status of online monitor.
Press such scheme, described input equipment is 5 independent buttons, connects with 5 I/O interfaces of described microprocessor respectively.
Press such scheme, it also comprises the communication module that connects with microprocessor, and described communication module is the CAN bus interface.Realize communicating by letter between slave computer and the host computer, when the user selected to upload measurement data, host computer was subjected to measurement data by the CAN bus interface and is saved in the database.
Press such scheme, described supply module is accumulator and voltage transformation module, and described voltage transformation module comprises exchanging changes direct current module and direct current DC/DC transducer.
Press such scheme, described warm and humid sensor is digital Temperature Humidity Sensor, connects with the I/O interface of microprocessor.
Press such scheme, described pressure transducer is digital pressure transducer, connects with the I/O interface of microprocessor after described direct current DC/DC transducer switching levels.
The course of work of the present utility model is: microprocessor sends the image data instruction, Temperature Humidity Sensor and pressure transducer are gathered sulfur hexafluoride (hereinafter to be referred as SF6) temperature, humidity and force value at that time, after microprocessor sends the read data instruction, sensor advances microprocessor with the data delivery that collects, microprocessor is gathered the time of clock module simultaneously, the time of these data of record acquisition, after microprocessor processes, calculate dew point and density value, related data is shown on LCDs.
The principle that the utility model relates to has: the SF6 gas dew point is measured and can be calculated according to the rh value and the temperature value of current gas.
Wherein, t is the temperature value of current gas, and unit is ℃; H is the rh value of current gas; Dp is the dew point value of current gas.
The SF6 manoscopy adopts beattie-Bridgeman equation graceful (JA.Beattie-O.C.Bridgeman) state equation to calculate.
P＝56.2×10
-6γT[1+2.51×10
-3γ(1-0.846×10
-3γ)]-74.9×10
-6γ
2(1-0.727×10
-3γ) (2)
Wherein, P is a force value, and unit is MPa; γ is a density value, and unit is Kg/m
3T is a temperature value, and unit is K.By gas temperature value and the force value that records, utilize Newton iteration method to calculate the density value γ of current SF6 gas, make the temperature T=20+273.15 in the formula (2) then, the γ substitution is calculated the force value of current SF6 gas 20 ℃ the time, and this force value has reflected the density situation of SF6 gas indirectly.
The beneficial effects of the utility model are: 1, can inquire about, calibrate automatically deviation in real time, while displays temperature, humidity, dew point, volume ratio, pressure, density and real-time time are for follow-up safeguard procedures are done previous work; 2, intellectuality simple to operate, easy to carry, complete; 3, integrated level height does not allow to be subject to outside contamination and interference; 3, can adopt two kinds of power supply modes of alternating current and accumulator.
Description of drawings
Fig. 1 is the structured flowchart of the utility model one embodiment
Embodiment
Fig. 1 is the structured flowchart of the utility model one embodiment, and it comprises microprocessor, supply module, Temperature Humidity Sensor, pressure transducer, clock module, display, input equipment and communication module.
Supply module is accumulator and voltage transformation module, and described voltage transformation module comprises exchanging changes direct current module and direct current DC/DC transducer.The 220V alternating current obtains 15V through exchange changeing the direct current module, then through direct current DC/DC transducer obtain systems control division divides and printing portion is required 5V power supply and each sensor need the 3.3V power supply; During no alternating current, adopt standby 12V lead-acid accumulator, obtain 5V and 3.3V power supply through direct current DC/DC transducer.
Temperature Humidity Sensor is digital Temperature Humidity Sensor, and pressure transducer is digital pressure transducer.Temperature Humidity Sensor is connected with the I/O interface of microprocessor, carries out exchanges data and processing.And needing to carry out the level conversion of 3.3V between pressure transducer and the microprocessor to 5V, this is to be realized by the electric resistance partial pressure of 1.8K and 3.3K.Pressure transducer is connected with the I/O interface of microprocessor, carries out exchanges data and processing.
Described clock module, mode with serial is carried out the transmission of data with microprocessor: directly 3 control lines with clock chip are connected with 3 I/O interfaces of microprocessor, mode by serial transmits multibyte clock signal, in microprocessor, real-time time is associated with the data of test, and stores.
Described display connects by the man-machine interface circuit with microprocessor, and display adopts the LCD LCDs of 320*240, and LCDs will show the current time of temperature, humidity, dew point, volume ratio, pressure, density and the system of SF6 in real time.
Described input equipment is a form of taking independent button, by external 5 the independent buttons of 5 I/O interfaces of microcontroller, and button has been carried out the anti-shake measure of delaying time in shunt capacitance and the program.The button input is used to be provided with the correlation parameter of this on-line monitoring instrument, and can switch the running status of online monitor.
Described communication module is the CAN bus interface that connects with microprocessor, and to realize communicating by letter between slave computer and the host computer, when the user selected to upload measurement data, host computer was subjected to measurement data by the CAN bus interface and is saved in the database.
This monitor is core with the microprocessor, send the image data instruction through microprocessor, Temperature Humidity Sensor and pressure transducer are gathered SF6 temperature, humidity and force value at that time, after microprocessor sends the read data instruction, sensor advances microprocessor with the data delivery that collects, after microprocessor processes, the related data that monitors shows on LCDs.If in 10 seconds, do not have button operation, the microprocessor above-mentioned action that will circulate; If button operation is arranged, then enter the feature operation interface, carry out operations such as time set, data query, data printing, realize on-line monitoring to SF6 dew point and density, guarantee the stability of electrical equipment.
Claims (7)
1. sulfur hexafluoride dew point and density on-line monitoring instrument, it is characterized in that: it comprises microprocessor, supply module, Temperature Humidity Sensor, pressure transducer, clock module and display; Wherein the power end of all modules of supply module and other connects; Temperature Humidity Sensor, pressure transducer and clock module connect with microprocessor; Display connects by the man-machine interface circuit with microprocessor.
2. sulfur hexafluoride dew point according to claim 1 and density on-line monitoring instrument is characterized in that: it also comprises the input equipment that connects with the I/O interface of described microprocessor.
3. sulfur hexafluoride dew point according to claim 2 and density on-line monitoring instrument is characterized in that: described input equipment is 5 independent buttons, connects with 5 I/O interfaces of described microprocessor respectively.
4. according to claim 1 or 2 or 3 described sulfur hexafluoride dew points and density on-line monitoring instrument, it is characterized in that: it also comprises the communication module that connects with microprocessor, and described communication module is the CAN bus interface.
5. according to claim 1 or 2 or 3 described sulfur hexafluoride dew points and density on-line monitoring instrument, it is characterized in that: described supply module is accumulator and voltage transformation module, and described voltage transformation module comprises exchanging changes direct current module and direct current DC/DC transducer.
6. according to claim 1 or 2 or 3 described sulfur hexafluoride dew points and density on-line monitoring instrument, it is characterized in that: described warm and humid sensor is digital Temperature Humidity Sensor, connects with the I/O interface of microprocessor.
7. sulfur hexafluoride dew point according to claim 5 and density on-line monitoring instrument is characterized in that: described pressure transducer is digital pressure transducer, connects with the I/O interface of microprocessor after described direct current DC/DC transducer switching levels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205899919U CN201837606U (en) | 2010-11-03 | 2010-11-03 | Online monitor for dew point and density of sulfur hexafluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205899919U CN201837606U (en) | 2010-11-03 | 2010-11-03 | Online monitor for dew point and density of sulfur hexafluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201837606U true CN201837606U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205899919U Expired - Fee Related CN201837606U (en) | 2010-11-03 | 2010-11-03 | Online monitor for dew point and density of sulfur hexafluoride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201837606U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907570A (en) * | 2017-11-23 | 2018-04-13 | 华能沁北发电有限责任公司 | A kind of compressed air pressure dew point on-line measuring device and its computational methods |
| CN109358091A (en) * | 2018-09-25 | 2019-02-19 | 四川泰兰德科技有限公司 | A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device |
| CN109540966A (en) * | 2018-12-27 | 2019-03-29 | 上海伦仕智能科技有限公司 | Dew point transmitter |
| CN110441681A (en) * | 2019-09-04 | 2019-11-12 | 上海乐研电气有限公司 | A kind of accurate teletransmission gas density relay of high, middle pressure and gas density monitor system |
| CN111830213A (en) * | 2020-08-17 | 2020-10-27 | 江苏利得智能监测科技有限公司 | Sulfur hexafluoride gas wireless micro-water density on-line monitoring method, system and device |
-
2010
- 2010-11-03 CN CN2010205899919U patent/CN201837606U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907570A (en) * | 2017-11-23 | 2018-04-13 | 华能沁北发电有限责任公司 | A kind of compressed air pressure dew point on-line measuring device and its computational methods |
| CN107907570B (en) * | 2017-11-23 | 2020-11-13 | 华能国际电力股份有限公司河南分公司 | Compressed air pressure dew point online detection device and calculation method thereof |
| CN109358091A (en) * | 2018-09-25 | 2019-02-19 | 四川泰兰德科技有限公司 | A kind of α-Al2O3-SiO2 capacitance sensor dew point measurement device |
| CN109540966A (en) * | 2018-12-27 | 2019-03-29 | 上海伦仕智能科技有限公司 | Dew point transmitter |
| CN110441681A (en) * | 2019-09-04 | 2019-11-12 | 上海乐研电气有限公司 | A kind of accurate teletransmission gas density relay of high, middle pressure and gas density monitor system |
| CN110441681B (en) * | 2019-09-04 | 2023-08-29 | 上海乐研电气有限公司 | High-medium-voltage precise remote gas density relay and gas density monitoring system |
| CN111830213A (en) * | 2020-08-17 | 2020-10-27 | 江苏利得智能监测科技有限公司 | Sulfur hexafluoride gas wireless micro-water density on-line monitoring method, system and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20121103 |