CN208254526U - Oil-field oil pumper multi-functional measurement instrument based on ZigBee - Google Patents

Oil-field oil pumper multi-functional measurement instrument based on ZigBee Download PDF

Info

Publication number
CN208254526U
CN208254526U CN201820077199.1U CN201820077199U CN208254526U CN 208254526 U CN208254526 U CN 208254526U CN 201820077199 U CN201820077199 U CN 201820077199U CN 208254526 U CN208254526 U CN 208254526U
Authority
CN
China
Prior art keywords
oil
zigbee
master control
measurement instrument
control borad
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201820077199.1U
Other languages
Chinese (zh)
Inventor
张新刚
王达
刘妍
孙晓林
王保平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanyang Normal University
Original Assignee
Nanyang Normal University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanyang Normal University filed Critical Nanyang Normal University
Priority to CN201820077199.1U priority Critical patent/CN208254526U/en
Application granted granted Critical
Publication of CN208254526U publication Critical patent/CN208254526U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses the oil-field oil pumper multi-functional measurement instruments based on ZigBee, specifically include that power backplane, master control borad, display board and host computer, the master control borad is folded to be inserted on the power backplane, the display board is folded insert in the master control borad perhaps extracted by DB15 line be set in control cabinet door the host computer pass through it is wired or wirelessly communicated with the master control borad.Real-time dynamic acquisition data, data precision height and safe and reliable advantage may be implemented in the oil pumping in oil fields motor multifunctional measuring instrumentss based on ZigBee of the utility model.

Description

Oil-field oil pumper multi-functional measurement instrument based on ZigBee
Technical field
The utility model relates to oil pumping in oil fields motor multifunctional field of measuring technique, and in particular, to based on ZigBee's Oil pumping in oil fields motor multifunctional measuring instrumentss.
Background technique
Pumping unit is the capital equipment in oil field operation, and in oil recovery process, be driven by a motor chain makes to kowtow pumping unit Machine maintains to move up and down continually to pump petroleum, this process pumping unit converts electric energy to kowtowing machine work Mechanical energy.The transfer efficiency of pumping unit electric energy to mechanical energy is directly related to oilfield exploitation power consumption cost and overall economic effect Benefit, however, since the influence of various factors and the limitation of technical conditions lead to motor utilization rate of electrical not in real oil producing operation Height, a large amount of electric energy are consumed.Currently, common power instrument has had more universal application in residential area, still Usually only have electrical energy measurement and over-current over-voltage protection function, have a single function, internal structure is simple, and electricity handles chip operation speed Degree is slow, and precision is not high, is not suitable in oil field operation.
ZigBee is built upon a kind of low-power consumption LAN protocol on IEEE802.15.4 standard, is a kind of short distance Wireless communication technique from, low-power consumption, its main feature is that short distance, low complex degree, self-organizing, low-power consumption, low data rate. ZigBee technology is mainly used for automatic control and remote control field, can incorporate each electronic product, application range is across the whole world The markets such as civilian, commercial, public and industrial.
The multi-functional pumping motor energy-saving protective control method of existing utility model and the controller (patent No. 201510878378.6) solution party of a kind of disposable energy conservation for solving pumping motor and safe operation problems is provided Case devises sensor and single chip circuit built in wide scope current measurement circuit and device, realize motor voltage, The measurement of electric current.
With anti-pushing manipulation, advantage according to the present utility model looks for corresponding disadvantage;The shortcomings that existing utility model is that do not have Standby wireless transmission function, does not also have motor protection function.Oil field operation site environment is severe, and existing utility model can not Facilitate the long-term in-site measurement of staff to obtain relevant electrical parameter information.
Utility model content
The purpose of this utility model is that in view of the above-mentioned problems, proposing the oil pumping in oil fields motor multifunctional based on ZigBee Measuring instrumentss, to realize the high and safe and reliable advantage of real-time dynamic acquisition data, data precision.
In order to achieve the above purposes, the technical solution adopted by the utility model is:, and the oil pumping in oil fields motor based on ZigBee is more Functional measurement instrument, specifically includes that
Power backplane, master control borad, display board and host computer, the master control borad is folded to be inserted on the power backplane, described aobvious Show plate it is folded insert in the master control borad or extracted by DB15 line be set in control cabinet door, the host computer by wired or Person wirelessly communicates with the master control borad.
Further, the power backplane includes power conversion module, voltage transformer, 3 road outputting circuit for relay and 3 Railway digital amount input circuit.
Further, the 3 railway digital amount input circuits and 3 road outputting circuit for relay be all made of PC817 optocoupler every From, external input terminals are powered with 12V, internal output terminal 3.3V voltage through 10K pull-up resistor with
The connection of STM32F103VET6 single-chip microcontroller pin, protects CPU not by external interference.
Further, the power backplane is also connected with external current transformer.
Further, the master control borad includes processor, electric quantity signal Acquisition Circuit, A/D conversion circuit, RS485, ether Net and ZigBee.
Further, the processor uses STM32F103VET6 single-chip microcontroller.
Further, the electricity chip that the electric quantity signal Acquisition Circuit uses is suitable for phase three-wire three for ATT7022EU The three-phase electric energy metering of mode and three-phase and four-line mode supports the calibration of pure software, provides and regards including RMS view in mode and PQS In two kinds of power of mode, energy meter mode, spi bus all the way is provided and processor carries out the friendship of calibration and measurement data Mutually.
Further, the A/D conversion circuit uses MCP3204, and oil pumping motor needs to acquire well mouth of oil well when working Temperature and pressure signal is alarmed according to the setting safety value of temperature and pressure, plays the role of protecting motor.
Further, the ZigBee receives the temperature and pressure value that oil pumping scene is sent, or with it is described upper Machine is communicated.
Further, the host computer passes through wired or wirelessly communicated with the master control borad;
Wired mode is communicated using the RS485 and Ethernet, and wireless mode mainly passes through ZigBee mould Block carries out the reception of transmission and the instruction of data.
The advantageous effects of the utility model:
1, the utility model uses the communication of IEEE802.15.4, can quickly realize the dynamic transmission of data It is protected with oil pumping motor, the variation of electricity is observed by computer capacity dynamic.It is simple, short with low biography rate, low-power consumption, agreement The major advantages such as delay, network capacity be big and safe and reliable, are the effective ways of current oil pumping in oil fields motor electrical measurement, for oil The production of well highly effective and safe provides advantage;
2, the utility model uses ATT7022EU electricity chip, and measurement accuracy is high, easy to use, interlock circuit installation letter It is single, three-phase current, voltage, power factor and frequency etc. can be easily measured, while supporting the calibration of pure software, provided all the way Spi bus and processor carry out the interaction of calibration and measurement data;Measurement accuracy is improved, can effectively reflect oil well oil-pumping electricity The electrical parameter of machine provides safeguard for oil security operation;
3, the utility model structure is simple, easy for installation, and cost performance is high, and equipment routine safety maintenance and inspection are convenient, The accuracy of installation effect and data is not influenced;
4, operating personnel can scene or remote reviewing oil pumping motor charge condition, and dynamic monitoring pumping well head Temperature and pressure, be able to achieve the functions such as electric quantity acquisition, electric motor protecting, long-range monitoring and data storage, not only easy for installation, function Can be complete, and data transmission is efficient and convenient.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification In become apparent, or understood and implementing the utility model.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is that the theory structure of the oil pumping in oil fields motor multifunctional measuring instrumentss described in the utility model based on ZigBee shows It is intended to;
Fig. 2 is the current effective value of the oil pumping in oil fields motor multifunctional measuring instrumentss described in the utility model based on ZigBee Ic and voltage effective value Ua numeral method figure;
Fig. 3 is the line voltage and conjunction of the oil pumping in oil fields motor multifunctional measuring instrumentss described in the utility model based on ZigBee Phase power liquid crystal display figure.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
The utility model mainly includes power backplane, four part of master control borad, display board and host computer, as shown in Figure 1.
The power backplane includes that power conversion module, voltage transformer, No. 3 relays output and 3 railway digital amounts are defeated Enter circuit.
The power conversion module includes DC/DC power conversion chip LM2596-12 and LM2596-5, and control voltage turns 5V direct current supply needed for A/D conversion circuit in 12VDC power supply power supply and the master control borad needed for changing supply circuit.
The voltage transformer is used to power to measuring instrumentss and protective relaying device, for measuring the electricity of oil pumping motor Pressure, power and electric energy, and can also oil pumping motor in line failure in protection circuit.
The input of 3 railway digital amounts and No. 3 relays output uses PC817 light-coupled isolation, external input terminals 12V Power supply, internal output terminal 3.3V voltage are connect through 10K pull-up resistor with the STM32F103VET6 single-chip microcontroller pin, are protected CPU is not by external interference.
The external current transformer is connected with power backplane.The external current transformer is in running current In range, the current information of power grid is provided to power instrument.Under grid failure state, power grid is provided to devices such as relay protections Fault current information.
The master control borad include processor, electric quantity signal Acquisition Circuit, A/D conversion circuit, RS485, Ethernet and ZigBee。
The processor uses STM32F103VET6 single-chip microcontroller.
The electricity chip that the electric quantity signal Acquisition Circuit uses for ATT7022EU, be suitable for phase three-wire three mode and The three-phase electric energy metering of three-phase and four-line mode supports the calibration of pure software, can provide and exist including RMS view in mode and PQS view Two kinds of power of mode, energy meter mode, provide spi bus all the way and processor carries out the interaction of calibration and measurement data
The A/D conversion circuit uses MCP3204, and oil pumping motor needs to acquire the temperature and pressure of well mouth of oil well when working Force signal is alarmed according to the setting safety value of temperature and pressure, plays the role of protecting motor.
The described RS485 communication uses ADM2587E, the utility model can by 485 communicating remotes to oil pumping motor into Row starting operation, the operation such as out of service, can setting operation warning note, and can be protected with remote setting and various adjustings Value.
The Ethernet uses ENC28J60, can be communicated with host computer.
The RS485 communication and the Ethernet, which exist simultaneously, makes the utility model have preferably compatibility, can To select suitable communication modes according to application environment.
The ZigBee can receive the temperature and pressure value that oil pumping scene is sent.Oil pumping scene, which uses, to be had The temperature and pressure transmitter of ZigBee function can acquire the temperature and pressure signal at oil pumping scene, will be electric without using cable Stream signal is transmitted to the ZigBee module on multifunction electric meter.It can also be communicated with the host computer.
The display board includes 8 Digital sum pipe display boards and LCD panel.Wherein, the 8 Digital sum pipes are shown Plate selects HT1632C drive digital tube to show.The LCD panel selects the JLX12864G liquid crystal display of small size.
The display board is made of four keys, 17 LED lights and 8 Digital sum pipes.
Four key arrangements are that failure hand-reset key is " multiple respectively from left to right in the lower zone of display board Position ", Menu key " Menu ", increasing key " ▲ ", enter key
The display board uses LG3641AH common cathode charactron for core, is auxiliary with LED display lamp, utilizes 10 Charactron and 17 LED light realize the display of the parameters such as oil pumping motor three-phase voltage, three-phase current respectively.
The host computer can be by wired or wirelessly communicated with the master control borad.Wired side Formula can use the RS485 and ethernet communication, and mainly pass through ZigBee module carries out data to the wireless mode Transmission and instruction reception.
The utility model is got up to work by the power backplane and folded insert of the master control borad.The display board can To select on master control borad described in folded be inserted in, it can also be come on control cabinet door and be shown by the extraction of DB15 line.
The course of work of the utility model:
Master control borad electricity chip ATT7022EU measure the current effective value of oil pumping motor three-phase, voltage effective value, power because Number, frequency, and the parameters such as active power, reactive power, apparent energy, active energy and reactive energy that can calculate each phase, Data exchange is carried out by spi bus and STM32F103VET6 single-chip microcontroller.
Meanwhile the temperature and pressure transmitter with ZigBee function by collection in worksite to temperature and pressure signal pass through Zigbee communication module is transmitted to the Zigbee module on multifunction electric meter master control borad, the A/D conversion chip on master control borad MCP3204 is converted to the temperature and pressure for the pumping well head that Zigbee module receives on voltage signal by spi bus It is transmitted to STM32 single-chip microcontroller, and electric quantity signal is stored in the address distributed in advance.
The various charge values of the collected oil pumping motor of master control borad can be shown by LCD panel, and can be with It is selected by four keys.When host computer is wanted to obtain some information about power, reading order first is sent to power instrument, Power instrument by wired mode is or corresponding information about power is transmitted to host computer by Zigbee module.
The electricity chip ATT7022EU needs to carry out before normal work calibration behavior, and calibration is i.e. according to some The collection value of electric quantity signal electricity chip and the actual value of the electric quantity signal calculate calibration parameter, this calibration parameter is write Enter into register corresponding with this electric quantity signal, the value for reading again this electric quantity signal from electricity chip will approximation etc. In actual value.
Under the configuration step of parameter is:
(1) 0XB9FE is written to mode configuration register w_ModeCfg, opening Vref Chopper can be promoted with reference to electricity The performance of pressure, configuration EMU are 921.6Khz, close zero passage.
(2) 0XF804 is written to w_EMUCfgEMU register, closes fundamental wave pin output function and opens simultaneously electrical energy measurement Function, configuration use PQS apparent energy energy balane.
(3) 0X3427 is written toward w_ModuleCFG module configuration register, opens the high-pass filtering function in seven channels A/D BOR power detecting function can be opened simultaneously.
(4) 0X0000 is written toward the idle phasing register of w_QPhscal, is exactly to correspond under the register default conditions FEMU is the setting value of 921.6Khz, and the frequency that the first step has been set EMU is 921.6Khz, therefore does not need to correct.
(5) it calculates and to HFConst assignment, shown in the calculation formula of HFConst such as formula (1):.
It is 0.367 that wherein Vu, which is the voltage value calculated result in the channel three-phase voltage A/D,;Vi is the channel three-phase current A/D Voltage value calculated result is 0.033;EC is that the value of meter constant this project is 3200;Un is voltage rating, value 220; Ib is rated current, value 30.HFConst calculated result is 16.7.
ATT7022EU calibration data subprogram:
It is embodied through the above technical solution:
The calibration effect of electric current is measured by JYM-3B three-phase electric energy meter calibration equipment.JYM-3B three-phase electric energy meter school The output voltage and electric current of experiment device are the rule controls according to percentage, before use need that rated current is arranged after powering With single-phase voltage rating over the ground, simultaneous selection rated current is 30A, and single-phase voltage rating over the ground is 220V.Carrying out calibration examination Voltage and current standard value is varied multiple times when testing to realize calibration.The mode for changing output voltage is first to press electrical energy meter calibration The U key of device, then inputs ratio.The calibration effect of electric current is as shown in table 1 under three-phase and four-line mode, unit A.
Table 1
The results show that the basic function of the Multifunctional power energy meter of the utility model can be realized and on sampling precision There is certain guarantee.
After the measurement, current effective value Ic and voltage effective value Ua can be found out from the numeral method on display board As a result, as shown in Figure 2.And the line voltage of liquid crystal screen display and close phase power, as shown in Figure 3.
At least can achieve it is following the utility model has the advantages that
1, the utility model uses the communication of IEEE802.15.4, can quickly realize the dynamic transmission of data It is protected with oil pumping motor, the variation of electricity is observed by computer capacity dynamic.It is simple, short with low biography rate, low-power consumption, agreement The major advantages such as delay, network capacity be big and safe and reliable, are the effective ways of current oil pumping in oil fields motor electrical measurement, for oil The production of well highly effective and safe provides advantage;
2, the utility model uses ATT7022EU electricity chip, and measurement accuracy is high, easy to use, interlock circuit installation letter It is single, three-phase current, voltage, power factor and frequency etc. can be easily measured, while supporting the calibration of pure software, provided all the way Spi bus and processor carry out the interaction of calibration and measurement data;Measurement accuracy is improved, can effectively reflect oil well oil-pumping electricity The electrical parameter of machine provides safeguard for oil security operation;
3, the utility model structure is simple, easy for installation, and cost performance is high, and equipment routine safety maintenance and inspection are convenient, The accuracy of installation effect and data is not influenced;
4, operating personnel can scene or remote reviewing oil pumping motor charge condition, and dynamic monitoring pumping well head Temperature and pressure, be able to achieve the functions such as electric quantity acquisition, electric motor protecting, long-range monitoring and data storage, not only easy for installation, function Can be complete, and data transmission is efficient and convenient.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims (10)

1. the oil-field oil pumper multi-functional measurement instrument based on ZigBee, which is characterized in that specifically include that
Power backplane, master control borad, display board and host computer, the master control borad is folded to be inserted on the power backplane, the display board It is folded insert in the master control borad and perhaps extracted by DB15 line be set to the host computer in control cabinet door and pass through wired or nothing The mode of line and the master control borad are communicated.
2. the oil-field oil pumper multi-functional measurement instrument according to claim 1 based on ZigBee, which is characterized in that described Power backplane includes power conversion module, voltage transformer, 3 road outputting circuit for relay and 3 railway digital amount input circuits.
3. the oil-field oil pumper multi-functional measurement instrument according to claim 2 based on ZigBee, which is characterized in that described 3 railway digital amount input circuits and 3 road outputting circuit for relay be all made of PC817 light-coupled isolation, external input terminals are supplied with 12V Electricity, internal output terminal 3.3V voltage are connect through 10K pull-up resistor with STM32F103VET6 single-chip microcontroller pin, protect CPU not by outer Boundary's interference.
4. the oil-field oil pumper multi-functional measurement instrument according to claim 2 based on ZigBee, which is characterized in that described Power backplane is also connected with external current transformer.
5. the oil-field oil pumper multi-functional measurement instrument according to claim 1 based on ZigBee, which is characterized in that described Master control borad includes processor, electric quantity signal Acquisition Circuit, A/D conversion circuit, RS485, Ethernet and ZigBee.
6. the oil-field oil pumper multi-functional measurement instrument according to claim 5 based on ZigBee, which is characterized in that described Processor uses STM32F103VET6 single-chip microcontroller.
7. the oil-field oil pumper multi-functional measurement instrument according to claim 5 based on ZigBee, which is characterized in that described The electricity chip that electric quantity signal Acquisition Circuit uses is ATT7022EU, suitable for phase three-wire three mode and three-phase and four-line mode Three-phase electric energy metering supports the calibration of pure software, provides and regards two kinds of power, energy in mode in mode and PQS including RMS view Metering method, provides spi bus all the way and processor carries out the interaction of calibration and measurement data.
8. the oil-field oil pumper multi-functional measurement instrument according to claim 5 based on ZigBee, which is characterized in that described A/D conversion circuit uses MCP3204, and oil pumping motor needs to acquire the temperature and pressure signal of well mouth of oil well when working, according to temperature The setting safety value with pressure is spent to alarm, and plays the role of protecting motor.
9. the oil-field oil pumper multi-functional measurement instrument according to claim 5 based on ZigBee, which is characterized in that described ZigBee receives the temperature and pressure value that oil pumping scene is sent, or is communicated with the host computer.
10. the oil-field oil pumper multi-functional measurement instrument according to claim 5 based on ZigBee, which is characterized in that institute State host computer pass through it is wired or wirelessly communicated with the master control borad;
Wired mode is communicated using the RS485 and Ethernet, wireless mode mainly pass through ZigBee module into The reception of transmission and the instruction of row data.
CN201820077199.1U 2018-01-17 2018-01-17 Oil-field oil pumper multi-functional measurement instrument based on ZigBee Expired - Fee Related CN208254526U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820077199.1U CN208254526U (en) 2018-01-17 2018-01-17 Oil-field oil pumper multi-functional measurement instrument based on ZigBee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820077199.1U CN208254526U (en) 2018-01-17 2018-01-17 Oil-field oil pumper multi-functional measurement instrument based on ZigBee

Publications (1)

Publication Number Publication Date
CN208254526U true CN208254526U (en) 2018-12-18

Family

ID=64620227

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820077199.1U Expired - Fee Related CN208254526U (en) 2018-01-17 2018-01-17 Oil-field oil pumper multi-functional measurement instrument based on ZigBee

Country Status (1)

Country Link
CN (1) CN208254526U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108020267A (en) * 2018-01-17 2018-05-11 南阳师范学院 Oil-field oil pumper multi-functional measurement instrument and method based on ZigBee
CN110501944A (en) * 2019-08-21 2019-11-26 东北大学秦皇岛分校 Production of hydrocarbons intelligent monitor system and method based on NB-IoT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108020267A (en) * 2018-01-17 2018-05-11 南阳师范学院 Oil-field oil pumper multi-functional measurement instrument and method based on ZigBee
CN110501944A (en) * 2019-08-21 2019-11-26 东北大学秦皇岛分校 Production of hydrocarbons intelligent monitor system and method based on NB-IoT

Similar Documents

Publication Publication Date Title
CN205544597U (en) Multi -functional three -phase power monitoring device
CN103105796B (en) Intellectual PT automatic Synchronization off-the-line switching device shifter
CN201518049U (en) Distribution transformer monitoring metering terminal
CN208254526U (en) Oil-field oil pumper multi-functional measurement instrument based on ZigBee
CN108415338A (en) A kind of students' dormitory safety monitoring system and method
CN201066448Y (en) Remote teaching measurement and control device for GSM oil field
CN203405518U (en) Data acquisition sensor system for intelligent transformer
CN110190672A (en) A kind of intelligent power detection device based on LoRa communication
CN204167883U (en) A kind of 10kV line short fault microcomputer protective relay device
CN207963960U (en) A kind of wireless multipoint humiture monitoring device
CN207817949U (en) A kind of electricity consumption data acquisition wireless communication device based on LoRa
CN204389614U (en) A kind of portable multi-function energy efficiency monitor
CN206054186U (en) A kind of protection supervisory equipment for photovoltaic wind power station
CN209103478U (en) Electric wiring safety intelligence monitoring and controlling instrument
CN108020267A (en) Oil-field oil pumper multi-functional measurement instrument and method based on ZigBee
CN111510360A (en) Remote multi-channel signal comprehensive acquisition system for electrical facilities
CN207686712U (en) A kind of oil well electrical parameter measuring device
CN203775473U (en) Power-saving control cabinet of intelligent street lamp
CN203225585U (en) Low voltage intelligent power distribution system
CN108693395A (en) A kind of distributing alternating-current charging pile monitoring system based on WSN
CN205265358U (en) Integrated monitoring system that photovoltaic case becomes
CN204391759U (en) A kind of power distribution station intelligent controlling device
CN203660953U (en) Submersible ground control apparatus
CN207924000U (en) A kind of distributing alternating-current charging pile monitoring system based on WSN
CN202929067U (en) Multipath guide rail type ammeter

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181218