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RU98100234A - LEVEL TRANSMITTER - Google Patents

LEVEL TRANSMITTER

Info

Publication number
RU98100234A
RU98100234A RU98100234/28A RU98100234A RU98100234A RU 98100234 A RU98100234 A RU 98100234A RU 98100234/28 A RU98100234/28 A RU 98100234/28A RU 98100234 A RU98100234 A RU 98100234A RU 98100234 A RU98100234 A RU 98100234A
Authority
RU
Russia
Prior art keywords
level transmitter
signal
microwave
microwave range
transmitter according
Prior art date
Application number
RU98100234/28A
Other languages
Russian (ru)
Other versions
RU2166737C2 (en
Inventor
А.Килб Джон
Л.Нельсон Ричард
Д.Мейникор Скотт
Original Assignee
Роузмаунт Инк.
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
Priority claimed from US08/486,649 external-priority patent/US5672975A/en
Application filed by Роузмаунт Инк. filed Critical Роузмаунт Инк.
Publication of RU98100234A publication Critical patent/RU98100234A/en
Application granted granted Critical
Publication of RU2166737C2 publication Critical patent/RU2166737C2/en

Links

Claims (11)

1. Передатчик уровня, выполненный с возможностью соединения с двухпроводной замкнутой системой автоматического управления процессом, предназначенный для измерения высоты продукта в резервуаре, содержащий антенну диапазона сверхвысоких частот, направленную к резервуару, источник сигналов диапазона сверхвысоких частот с пониженной мощностью для направления сигнала диапазона сверхвысоких частот через антенну диапазона сверхвысоких частот в резервуар, приемник сигналов диапазона сверхвысоких частот с пониженной мощностью для приема сигнала диапазона сверхвысоких частот, отраженного от резервуара, блок измерения, связанный с источником и приемником, для инициирования передачи сигнала диапазона сверхвысоких частот и определения высоты продукта на основе принимаемого сигнала, выходной блок, связанный с двухпроводной замкнутой системой автоматического управления процессом, для передачи информации, относящейся к высоте продукта, по замкнутой системе, и блок питания, связанный с двухпроводной замкнутой системой автоматического управления процессом, для приема энергии от замкнутой системы для питания передатчика уровня.1. The level transmitter, configured to connect with a two-wire closed system of automatic process control, designed to measure the height of the product in the tank, containing an antenna of the microwave range, directed to the tank, a signal source of a microwave range with reduced power to direct the microwave signal through a microwave range antenna to the reservoir; a low power microwave range signal receiver for receiving a signal of the microwave range reflected from the reservoir, a measurement unit associated with the source and receiver to initiate the transmission of the signal of the microwave range and determine the height of the product based on the received signal, the output unit associated with a two-wire closed-loop automatic process control system for transmitting information, related to the height of the product, in a closed system, and a power supply connected to a two-wire closed system for automatic process control, for receiving energy and from a closed system to power the level transmitter. 2. Передатчик уровня по п. 1, отличающийся тем, что блок измерения измеряет временную задержку между передачей сигнала диапазона сверхвысоких частот и приемом отраженного сигнала диапазона сверхвысоких частот. 2. The level transmitter according to claim 1, characterized in that the measuring unit measures the time delay between the transmission of the microwave signal and the reception of the reflected microwave signal. 3. Передатчик уровня по п. 1, отличающийся тем, что блок измерения содержит первый генератор тактовых импульсов, связанный с источником, для периодического инициирования сигнала диапазона сверхвысоких частот на первой частоте тактовых импульсов. 3. The level transmitter according to claim 1, characterized in that the measuring unit comprises a first clock generator associated with the source for periodically triggering a microwave signal at the first clock frequency. 4. Передатчик уровня по п. 3, отличающийся тем, что блок измерения также содержит второй генератор тактовых импульсов, связанный с приемником, для периодического стробирования принимаемого сигнала, на второй частоте тактовых импульсов, при этом блок измерения определяет высоту продукта на основе приема принимаемого сигнала и разности между первой и второй частотами тактовых импульсов. 4. The level transmitter according to claim 3, characterized in that the measurement unit also comprises a second clock generator associated with the receiver for periodically gating the received signal at a second clock frequency, wherein the measurement unit determines the height of the product based on the reception of the received signal and the difference between the first and second clock frequencies. 5. Передатчик уровня по п. 4, отличающийся тем, что вторая частота тактовых импульсов генерируется на основе первой частоты тактовых импульсов плюс разность частот. 5. The level transmitter according to claim 4, characterized in that the second clock frequency is generated based on the first clock frequency plus the frequency difference. 6. Передатчик уровня по п. 4, отличающийся тем, что первая частота тактовых импульсов находится между около 1,0 МГц и около 4,0 МГц, и разность между первой и второй частотами тактовых импульсов находится между около 10 Гц и около 40 Гц. 6. The level transmitter according to claim 4, characterized in that the first clock frequency is between about 1.0 MHz and about 4.0 MHz, and the difference between the first and second clock frequencies is between about 10 Hz and about 40 Hz. 7. Передатчик уровня п.1, отличающийся тем, что замкнутая система автоматического управления процессом является замкнутой системой автоматического управления процессом, работающим при токе 4-20 мА. 7. The level transmitter of claim 1, characterized in that the closed-loop automatic process control system is a closed-loop automatic process control system operating at a current of 4-20 mA. 8. Передатчик уровня по п. 1, отличающийся тем, что содержит вторую антенну диапазона сверхвысоких частот, связанную с приемником сигнала диапазона сверхвысоких частот. 8. The level transmitter according to claim 1, characterized in that it contains a second antenna of the microwave range associated with the receiver of the microwave signal. 9. Передатчик уровня по п. 4, отличающийся тем, что содержит приемник импульсов, принимающий сигнал диапазона сверхвысоких частот и обеспечивающий стробированный выходной сигнал при реагировании на вторую частоту тактовых импульсов. 9. The level transmitter according to claim 4, characterized in that it comprises a pulse receiver that receives a signal of the microwave range and provides a gated output signal when responding to a second clock frequency. 10. Передатчик уровня по п. 1, отличающийся тем, что содержит корпус взрывобезопасного исполнения, который содержит блок передатчика уровня. 10. The level transmitter according to claim 1, characterized in that it contains an explosion-proof housing, which contains a level transmitter unit. 11. Передатчик уровня по п. 1, отличающийся тем, что антенна диапазона сверхвысоких частот содержит удлиненный зонд диапазона сверхвысоких частот, проходящий в резервуар, для передачи по нему сигнала диапазона сверхвысоких частот. 11. The level transmitter according to claim 1, characterized in that the microwave range antenna comprises an elongated microwave range probe extending into the reservoir for transmitting a microwave range signal thereon.
RU98100234/28A 1995-06-07 1996-05-31 Level meter and transmitter RU2166737C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/486,649 US5672975A (en) 1995-06-07 1995-06-07 Two-wire level transmitter
US08/486,649 1995-06-07

Publications (2)

Publication Number Publication Date
RU98100234A true RU98100234A (en) 1999-10-10
RU2166737C2 RU2166737C2 (en) 2001-05-10

Family

ID=23932723

Family Applications (1)

Application Number Title Priority Date Filing Date
RU98100234/28A RU2166737C2 (en) 1995-06-07 1996-05-31 Level meter and transmitter

Country Status (10)

Country Link
US (2) US5672975A (en)
EP (1) EP0830574A1 (en)
JP (1) JP3839056B2 (en)
CN (1) CN1087423C (en)
BR (1) BR9608434A (en)
CA (1) CA2223151A1 (en)
DE (1) DE29623918U1 (en)
MX (1) MX9709323A (en)
RU (1) RU2166737C2 (en)
WO (1) WO1996041135A1 (en)

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