摘要:
A membrane-electrode assembly 1 having an anode catalyst layer 20 and cathode catalyst layer 30 that are mutually opposing and a polymer electrolyte membrane 10 formed between the anode catalyst layer 20 and cathode catalyst layer 30, wherein the anode catalyst layer 20 is composed of a plurality of ion-exchange layers 20a and 20b with different layer ion-exchange capacities, and of the plurality of ion-exchange layers 20a and 20b, ion-exchange layer A (20a) having the smallest layer ion-exchange capacity is situated more toward the polymer electrolyte membrane 10 side than ion-exchange layer B (20b) having the largest layer ion-exchange capacity, and the ratio of the layer ion-exchange capacity of the ion-exchange layer B (20b) with respect to the layer ion-exchange capacity of the ion-exchange layer A (20a) is 1.7 or greater.
摘要:
In a millimeter waveband transceiver using an antenna and a waveguide for a connection line, it is necessary to perform transmission mode line conversion between TEM waves of a microstrip line and VTE01 mode waves of the waveguide. There is a limit to reducing the conversion loss using only a matching box for connecting the microstrip line with the waveguide. In a transmission mode line transducer for converting between the TEM waves of the microstrip line and the VTE01 mode waves of the waveguide, if the cross-sections are substantially the same size, in the case of a 50Ω microstrip line when the characteristic impedance of the waveguide is about 80%, i.e., 40Ω, the line conversion loss can be optimized. Therefore, the microstrip line is connected with the waveguide using a λ/4 matching box via a ridged waveguide having a low impedance and a length of λ/16 or less.
摘要:
A small, light and low-cost on-vehicle radar which reduces noise caused by a road surface, own car and radar itself, prevents road clutter and improves detection performance is provided. The on-vehicle radar includes an antenna having one or a plurality of radiation elements which radiate linearly polarized waves, a slit plate provided with a plurality of slits on a metal plate disposed in front of this antenna surface and a foamed material provided between the antenna and slit plate. Side lobes whose principal component is a cross polarized wave from a feeder line of the antenna can be reduced and road clutter can be prevented. Resonance of slits whose characteristic frequency becomes equal to or smaller than the frequency of vehicle can be reduced and noise can be suppressed. Therefore, it is possible to obtain excellent detection performance as the radar apparatus.
摘要:
An electromagnetic wave propagation medium 1 extends in the propagation direction of an electromagnetic wave and has an electromagnetic wave propagation space sandwiched between conductors in the direction perpendicular to the electromagnetic wave propagation direction. A base unit 2 and multiple terminals 3 are placed on the electromagnetic wave propagation medium 1. When the position of a terminal 3 is detected, the base unit 2 transmits a position detection signal through the electromagnetic wave propagation medium 1 to the terminal 3. This position detection signal is attenuated more heavily during its propagation through the electromagnetic wave propagation medium 1 than a communication signal for use in normal communication is. The signal strength of the position detection signal drops as it moves away from the base unit 2. Hence the position of each terminal 3 can be detected based on the signal strength of the position detection signal received by each terminal 3.
摘要:
In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying of an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented.
摘要:
A wireless power transmission system includes a receiver and a transmitter. The transmitter includes: a power transmission unit that transmits power; a power adjustment unit that adjusts power to be transmitted; and a communication unit. The receiver includes: a power receiving unit that receives power; a power detection unit that detects the received power; a power storage unit that stores the received power; and a communication unit. The power to be transmitted is adjusted on the basis of power transmission efficiency and the remaining energy storage level. The power transmission efficiency is the ratio between the transmitted power and the received power.
摘要:
When a microstrip line is connected with a waveguide, there is a limit to reducing the connection loss by using only a matching box. We have discovered that in a transmission mode line transducer for converting between the TEM waves of the microstrip line and the TE01 waves of the waveguide, if the cross-sections of the microstrip line and the waveguide are substantially the same size, in the case of a 50Ω microstrip line when the characteristic impedance of the waveguide is about 80%, i.e., 40Ω, the line conversion loss can be optimized. Therefore, according to the present invention, the microstrip line is connected with the waveguide using a λ/4 matching box by means of a ridged waveguide having a low impedance and a length of λ/16 or less.
摘要:
A polymer electrolyte composition comprising a component (A) defined below, and at least one kind of a component (B) selected from the group consisting of a component (B1) defined below and a component (B2) defined below: (A) a polymer electrolyte; (B1) a compound having a degree of affinity for platinum of 10% or more; and (B2) a compound having at least two kinds of atoms having an unshared electron pair, selected from the group consisting of a nitrogen atom, a phosphorus atom, and a sulfur atom in the molecule.
摘要:
A membrane-electrode assembly, containing an electrode catalyst containing a base metal complex, in which exchange current density i0 obtained from a Tafel plot, which is related to current density and voltage, is 5.0×10−4 Acm−2 or more, and in which a Tafel slope obtained from the Tafel plot is 450 mV/decade or less; anda membrane-electrode assembly, containing catalyst layers each containing an electrode catalyst on both sides of an electrolyte membrane, in which at least one of the catalyst layers comprises a non-noble metal-based electrode catalyst, and in which the electrolyte membrane is a hydrocarbon-based electrolyte membrane.
摘要:
In a needle bar transfer device for a multi-needle sewing machine, a depressing member is secured to a needle bar descending lever for aligning entire needle bars in an equal height at the time of transferring the needle bars, while a needle bar holding member is extended from the needle bar descending lever. Holding portions which are engageable with recessed portions provided at the upper ends of inoperative needle bars and an escape portion which receives an operative needle bar in an interference preventing manner are provided in the needle bar holding member.