摘要:
A communication system for vehicles, which obtains exact communication processing with responders mounted on vehicles running on a road having a plurality of traffic lanes, is disclosed. An expressway has three traffic lanes. A gantry is disposed in a specified position on the expressway. On the gantry are disposed antenna units to counter the traffic lanes respectively. The antenna units are provided with communication areas by means of a pair of antenna elements respectively. The antenna element is composed of a microstrip array antenna disposed with eight pieces of patches laid out in two rows with four pieces in each row. The antenna units controls communication processing to communicate with vehicles adjoining each other. When response signals are sent from a vehicle mounted responder, the vehicle mounted responder is fixed and communication processing for toll collection is performed. As a result, communication processing with responders mounted on vehicles respectively which are running in the respective traffic lanes can exactly be performed.
摘要:
A semiconductor integrated circuit, which can precisely measure the sleep time of a CPU by using a built-in oscillation circuit which does not utilize an oscillator to automatically activate the CPU, is disclosed. A communication control part of a responder mounted on a vehicle, which composes a toll road charging system, is composed of an LSI having a built-in CPU with a sleep function for automatically stopping operation clocks. The CPU is held in the sleep state for a certain time period from the time when the responder completes data communications with a ground station until the time when the responder exits the communication area of the ground station. The sleep time is measured by having a dividing counter downcount oscillation signals from a CR oscillation circuit built in the LSI. However, as the oscillation frequency of the CR oscillation circuit varies according to the operational environment, such as temperature, the CPU obtains the frequency error of the second clock pulses and correct the count value for sleep time measurement based on the reference clock pulses from a quartz oscillator, which becomes the operation clocks of its own, immediately before entering the sleep state.
摘要:
To enable communications between a vehicle-installed device and an antenna unit even when the vehicle-installed device passes through an area where neighboring communication areas overlap each other, a toll collection point of a multiple-lane express road is provided with a gantry having antenna units provided corresponding to the lanes. The antenna units are controlled so that neighboring units alternately transmit signals. The antenna units transmit signals according to a predetermined cycle and transmit an unmodulated carrier wave. Upon receiving a signal, a vehicle-installed device generates a response signal by using a control circuit and transmits a signal by reflection, fixes a communication party for further communications and assumes a status of waiting for an interrogation signal. If the vehicle-installed device receives pilot signals repeatedly from a single antenna unit, the device determines that the communications have failed, and cancels the fixation of communication party and invalidates the party to become able to communicate with other antenna units. The vehicle-installed device will communicate with one of the antenna units without a failure even if the device passes through an overlapping area, thus performing tolling processing without a failure.
摘要:
A synchrotron radiation source and a method of making the same. As assembly of a beam absorber for absorbing synchrotron radiation beams and a piping for cooling the beam absorber is mounted in a charged particle beam duct of a bending section of the synchrotron radiation source for bending a charged particle beam. Fixed to at least one straight duct that is connectable to either of the opposite ends of the charged particle beam duch is a piping guide duct through which the beam absorber cooling piping is drawn to the outside, so that the assembly of the beam absorber and the beam absorber cooling piping can readily be mounted in the synchrotron radiation source.
摘要:
A grommet (10) according to an embodiment of the present invention includes a wire harness connecting part (11) which is liquid-tightly connected to a wire harness (20), a panel connecting part (13) which can be liquid-tightly connected to a panel opening (31), an extending part (12) shape-changeably extending between the wire harness connecting part (11) and the panel connecting part (13), and an extending-part-shape maintaining part (12a) which maintains a shape of the extending part (12) in a state where a distance between the wire harness connecting part (11) and the panel connecting part (13) in a length direction of the wire harness (20) is shorter than that of the case where the panel connecting part (13) is liquid-tightly connected to the panel opening (31).
摘要:
The present invention aims to provide an interlayer film for a laminated glass providing excellent overall sound insulation at temperatures in the wide range of from 10 to 60° C.The present invention is an interlayer film for a laminated glass, including: a sound insulation layer 1; a middle layer; and a sound insulation layer 2, the layers each containing a polyvinyl acetal resin and a plasticizer and being laminated in the stated order, wherein the amount of the plasticizer per 100 parts by weight of the polyvinyl acetal resin in the sound insulation layer 1 is different by from 5 to 60 parts by weight from the amount of the plasticizer per 100 parts by weight of the polyvinyl acetal resin in the sound insulation layer 2, and the amounts of acetyl groups in the polyvinyl acetal resin contained in the sound insulation layer 1 and the sound insulation layer 2 each are larger than the amount of acetyl groups in the polyvinyl acetal resin contained in the middle layer.
摘要:
An electrical connecting box suitable to widely-ranging temperature conditions from high temperature to low temperature inside the engine room of a vehicle is described, having a printed circuit board 300 and a first protecting member 100 and a second protecting member 200 housing the printed circuit board in a sandwich state. In this electrical connecting box an extended portion 310 being a part of electrical parts is formed upon a board surface 301 on the side of the first protecting member of the printed circuit board. Additionally, first pillar portions 110 and a second pillar portion 120 are formed upon the inside surface of the first protecting member facing one side of the board surfaces, and a tip 111 and a tip 121 of these pillar portions, according to bending of the first protecting member, can be in either a contacted state or a spaced state with respect to the board surface 301 or, alternatively, a projecting body 321 fixed to the board surface. When the first pillar portions are contacting the one side of the board surfaces, there is a gap between the extended portion and the inside surface of the first protecting member such that they do not interfere with each other.