Abstract

A method for digital wireless communication through a barrier (6) made of a conductive material, preferably metal, consisting in transmission of an encoded digital information using a transmitter (1), by generation of a static magnetic field with a stepwise variable spatial orientation of the magnetic induction vector on a first side of the barrier (6), then reading a resulting spatial orientation of the magnetic induction vector on a second side of the barrier (6) using an at least one spatial orientation sensor of the magnetic induction vector located in a receiver (3), and subsequently decoding the digital information from the stepwise variable spatial orientation of the magnetic induction vector by means of a reading system (4) connected to the receiver (3). The invention comprises also a system for performing digital wireless communication through a barrier and a system for monitoring the level of fluid content in a metal air-tight container.

IPC Classes  ?

• H04B 5/26 - using coils
• H04B 5/77 - for interrogation
• H04B 5/79 - for data transfer in combination with power transfer

Abstract

According to the present invention there is provided a container (1) for pressurized liquid gas, such as LPG or LNG, having an opening (2) leading from outside to inside of the container (1) and having a microwave fluid level sensor (4) mounted on the outside of the container (1) over the opening (2) and configured to emit a microwave beam towards the inside of the container (1) and to receive a microwave beam reflected from the surface of the liquid inside the container (1). Between the microwave fluid level sensor (4) and the inside of the container (1) there is a lid (3) closing the opening (2), wherein said lid (3) is made of plastic material capable of transmitting at least a part of said microwave beams.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive loop type
• H04B 5/02 - Near-field transmission systems, e.g. inductive loop type using transceiver
• G06K 7/10 - Methods or arrangements for sensing record carriers by corpuscular radiation
• G01F 23/284 - Electromagnetic waves
• G01S 7/02 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group

Abstract

A method for digital wireless communication through a barrier (6) made of a conductive material, preferably metal, consisting in transmission of an encoded digital information using a transmitter (1), by generation of a static magnetic field with a stepwise variable spatial orientation of the magnetic induction vector on a first side of the barrier (6), then reading a resulting spatial orientation of the magnetic induction vector on a second side of the barrier (6) using an at least one spatial orientation sensor of the magnetic induction vector located in a receiver (3), and subsequently decoding the digital information from the stepwise variable spatial orientation of the magnetic induction vector by means of a reading system (4) connected to the receiver (3). The invention comprises also a system for performing digital wireless communication through a barrier (6) and a system for monitoring the level of fluid content in a metal air-tight container.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive loop type
• H04B 5/02 - Near-field transmission systems, e.g. inductive loop type using transceiver
• G06K 7/10 - Methods or arrangements for sensing record carriers by corpuscular radiation
• G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code

Abstract

The invention relates to an electric circuit of a generator of oscillations, comprising an enhancement-mode field transistor T1, inductance L1 and resistance R1 connected to the source or the drain of the transistor T1, characterized in that the inductance L1 is connected directly between the gate and the drain of the transistor T1 or to an electric circuit of a generator of oscillations, comprising an depletion-mode field transistor T1, inductance L1 and resistance R1 connected with its one end to the source of the transistor T1, characterized in that the inductance L1 is connected directly between the gate of the transistor T1 and the other end of the resistance R1.

IPC Classes  ?

• H03B 5/12 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
• H03B 5/24 - Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device