摘要:
In order to detect microwaves from radar type speed measurement devices and microwaves leaking out of reverse detectors without being detected by such reverse detectors, a microwave detector is provided with a super-heterodyne type reception circuit for cyclically performing reception operations to receive target microwave frequencies of prescribed microwave bands, the reception circuit including a first local oscillator which can carry out a fixed oscillation at a prescribed frequency or a sweep of a prescribed frequency range established slightly outside the frequency range of the local oscillator of a reverse detector, and a plurality of second local oscillators having different oscillation frequencies, whereby the reception circuit is able to receive microwaves in the target bands and microwaves leaking out of the local oscillator of a reverse detector.
摘要:
A microwave detector includes a horn antenna and cavity formed by covering a metallic film of a printed substrate with an opened bottom microwave circuit component, and further includes a mixer diode which is positioned at the feeding point of the horn antenna and sandwiched between the microwave circuit component and the printed substrate, the mixer diode including a mixer diode substrate having a first protruding portion at a first end of the mixer diode substrate and a second protruding portion at a second end of the mixer diode substrate, separate anode and cathode electrode patterns formed on a surface of the substrate which includes the protruding portions, and a beam-lead-type or flip-chip-type diode which is mounted to a surface of the mixer diode substrate near the center thereof, the beam-lead-type or flip-chip-type diode having an anode and a cathode which are surface mounted to the anode and cathode electrode patterns to form electrically conducting pathways therewith, wherein the first and second protruding portions are directly or indirectly connected respectively to the microwave circuit component and the printed substrate.
摘要:
A microwave detector for detecting faint detection target microwave signals is constructed from a heterodyne-type reception portion equipped with an antenna for picking up microwave signals, a local oscillator for repeatedly carrying out a sweep operation, and a mixer for frequency mixing the output from the antenna with the output from the local oscillator, wherein the heterodyne reception portion outputs detected wave signals based on the output from the mixer; a digital processing portion which receives the detected wave signals outputted from the reception portion, wherein the digital processing portion is designed to output a High pulse when the level of the detected wave signals reaches or exceeds a prescribed reference level, and a Low pulse when the level of the detected wave signals is below the reference level; a sweep control portion for controlling the sweep operation of the local oscillator based on the High and Low pulses outputted from the digital processing portion; and a judgement portion for judging whether or not a detection target microwave signal has been detected based on at least one measured or calculated quantity such as the total time High pulses are outputted by the digital processing portion, the total time a sweep stop is carried out by the sweep control portion, the total time required to complete a sweep, or a relationship between the total time High pulses are outputted and the total time Low pulses are outputted (e.g., the duty thereof). Further, a separate judgement-use digital signal generating portion may be provided to enable sweep control and detection judgements to be carried out by separately generated digital signals, and the detection accuracy can be further improved by dividing each sweep into a plurality of sampling regions and by providing a signal discrimination portion or signal discrimination function.
摘要:
A polymer composition which comprises a polymer, a phosphorus compound (a), and a phenol compound (b). The phosphorus compound (a) is, e.g., at least one member selected from compounds represented by the following formula (1). The phenol compound (b) is, e.g., at least one member selected from compounds represented by the following general formula (4), wherein in the general formula (1), the R1 represents C1-20 alkyl, allyl, cycloalkyl, phenyl, or alkoxyalkyl and n is 1 or 2, provided that when two R1's are present, then the R1's may be the same or different, wherein in the general formula (4), the R4's each independently represents C1-20 alkyl, allyl, cycloalkyl, phenyl, alkoxy, or alkylthiomethyl.
摘要:
An aqueous dispersion of polymer particles each consisting essentially of (a) a syndiotactic 1,2-polybutadiene having 70% or more of unsaturated hydrocarbon groups in the side chains and having a melting point of 70.degree. C. or higher, (b) a polymer mixture of said polybutadiene (a) and other polymer in the form that (a) and (b) co-exist in the same particle, or (c) a copolymer obtained by graft-polymerizing a conjugated diene and/or other polymerizable monomer on said polybutadiene (a), each of said particles having an average diameter of 10 .mu.m or less. Said aqueous dispersion can be produced by a process comprising steps of adding, to an aqueous dispersion of a first catalyst component solution, a conjugated diene monomer and a second catalyst component and polymerizing said conjugated diene monomer, characterized in that the first catalyst component solution contains (A) a cobalt compound, (B) at least one member selected from the group consisting of alkali metals, organometallic compounds of metals of Groups I to III of the Periodic Table and hydrides of metals of Groups I to III of the Periodic Table, and (C) 1 to 1,000 moles, per mole of the cobalt compound (A), of a conjugated diene compound and then the second catalyst component is at least one compound selected from the group consisting of carbon disulfide, phenylisothiocyanic acid and a xanthogen compound.
摘要:
A conjugated diene sulfonation product represented by the formula (I): ##STR1## wherein R.sup.1 to R.sup.6, which may be the same or different represent hydrogen atoms, alkyl groups having 1 to 8 carbon atoms, aryl groups having 6 to 20 carbon atoms or --SO.sub.3 X groups (X represents a hydrogen atom, a metal atom, an ammonium group or a quaternary ammonium group), at least one of said R.sup.1 to R.sup.6 being the --SO.sub.3 X group, a polymer of the conjugated diene sulfonation product or a copolymer of the conjugated diene sulfonation product with a monomer copolymerizable therewith. The sulfonation product, the polymer and the copolymer are useful as a dispersing agent for preparing a solid fuel dispersion, a cement dispersion, a dye and/or pigment dispersion or a metal oxide dispersion or as a water-treating agent, a fiber-treating agent, a plating bath additive and an excavation-muddy water-viscosity-adjusting agent.
摘要:
A vibration sensor is secured to an object whose vibrations are to be sensed, and includes a vibration plate capable of resonating at one of first resonance frequencies within a specific high frequency region of the frequencies at which the object can vibrate. A vibration element capable of resonating at one of second resonance frequencies within a specific low frequency region of the frequencies at which the object can vibrate is connected to the vibration plate so that the vibration resulting from the resonance of the vibration element is transmitted to the vibration plate. Further, a piezoelectric transducer element is fixed to the vibration plate, and is able to generate an electric signal in response to the stress applied by the vibration plate when this plate vibrates. Thus, it is possible, with a single sensor, to sense both vibrations composed of relatively high frequency components and vibrations composed of relatively low frequency components.
摘要:
A toner cartridge employed in an electrophotographic printer and capable of attachment to or detachment from the electrophotographic printer. The toner cartridge includes a stirring member (4) which touches the inner wall of the cartridge (100) to reliably stir the toner contained in the cartridge (100). The stirring member (4) is rotatable and is interlocked with a gear (5) which is rotated by an external drive force.
摘要:
A diene polymer produced by polymerizing a conjugated diene monomer in a solvent solution of an active lithium-terminated polymer in the presence of a catalyst consisting of (A) a cobalt compound and (B) carbon disulfide and/or phenylisothiocyanic acid. The diene polymer comprises a 1,2-polybutadiene portion having a high percentage of vinyl conformation. The diene polymer has substantially no mercaptan compound.