Abstract: A wiper control method and a wiper control device which can stabilize wiping rhythm of a wiper while ensuring required wiping and smoothly respond to change of a rainfall situation are provided. An adhesion cycle of a raindrop adhering on a detection surface is detected, a current adhesion cycle to be the basis when determining an intermittence time of a wiper is determined based on the detected raindrop adhesion cycle, the wiper intermittence time is determined based on the current adhesion cycle, a raindrop adhesion cycle shorter than the current adhesion cycle is detected, and when the raindrop adhesion cycle shorter than the current adhesion cycle is detected a predetermined number of times, the current adhesion cycle is changed to a shorter adhesion cycle and the wiper intermittence time is determined based on the changed current adhesion cycle.

Abstract: A wiper controlling apparatus capable of discriminating between a signal change at the time of a wiper blade passage and that at the time of a raindrop impact so as to allow a wiper control promptly responding to the change in the condition of the sensing surface is provided.

Abstract: A wiper controlling apparatus capable of discriminating between a signal change at the time of a wiper blade passage and that at the time of a raindrop impact so as to allow a wiper control promptly responding to the change in the condition of the sensing surface is provided.

Abstract: A signal processing circuit provided with an outside-light component reducing circuit capable of reducing an outside light component in the frequency separation method is provided. This is a signal detecting circuit which irradiates a pulse light from an LED to a windshield of a vehicle, receives a reflected light by a PD, processes the pulse signal from the PD and inputs it to a processing unit in order to automatically control a wiper for eliminating raindrops on the windshield of the vehicle. This is provided with a current—voltage converter circuit for converting the pulse signal from the LED to a voltage signal, an outside-light component reducing circuit provided in parallel with the current—voltage converter circuit for reducing the outside light component included in the output signal of the current—voltage converter circuit and a band-pass filter circuit/amplifier circuit for reducing the noise in the output signal of the current—voltage converter circuit and amplifying the output signal.

Abstract: A wiper control method and a wiper control device are provided which can smoothly respond to rapid change of a rainfall situation at passage of a rainfall shutoff environment such as a tunnel. A wiping state control part 42 determines entry of a vehicle into the rainfall shutoff environment, sets a wiping level low for the low level of rainfall less than a predetermined rainfall level in response to this determination or sets the wiping level high for the high level rainfall at the predetermined rainfall level or more. A rainfall level generation part 32 detects adhesion of raindrops and determines the rainfall level. A wiper driving signal generation part 48 determines wiper operation based on the rainfall level determined by the rainfall level generation part 32 and the wiping level set by the wiping state control part 42.

Abstract: A wiper control method and a wiper control device which can stabilize wiping rhythm of a wiper while ensuring required wiping and smoothly respond to change of a rainfall situation are provided. An adhesion cycle of a raindrop adhering on a detection surface is detected, a current adhesion cycle to be the basis when determining an intermittence time of a wiper is determined based on the detected raindrop adhesion cycle, the wiper intermittence time is determined based on the current adhesion cycle, a raindrop adhesion cycle shorter than the current adhesion cycle is detected, and when the raindrop adhesion cycle shorter than the current adhesion cycle is detected a predetermined number of times, the current adhesion cycle is changed to a shorter adhesion cycle and the wiper intermittence time is determined based on the changed current adhesion cycle.

Abstract: A signal processing circuit provided with an outside-light component reducing circuit capable of reducing an outside light component in the frequency separation method is provided. This is a signal detecting circuit which irradiates a pulse light from an LED to a windshield of a vehicle, receives a reflected light by a PD, processes the pulse signal from the PD and inputs it to a processing unit in order to automatically control a wiper for eliminating raindrops on the windshield of the vehicle. This is provided with a current-voltage converter circuit for converting the pulse signal from the LED to a voltage signal, an outside-light component reducing circuit provided in parallel with the current-voltage converter circuit for reducing the outside light component included in the output signal of the current-voltage converter circuit and a band-pass filter circuit/amplifier circuit for reducing the noise in the output signal of the current-voltage converter circuit and amplifying the output signal.

Abstract: A wiper control method and a wiper control device are provided which can smoothly respond to rapid change of a rainfall situation at passage of a rainfall shutoff environment such as a tunnel. A wiping state control part 42 determines entry of a vehicle into the rainfall shutoff environment, sets a wiping level low for the low level of rainfall less than a predetermined rainfall level in response to this determination or sets the wiping level high for the high level rainfall at the predetermined rainfall level or more. A rainfall level generation part 32 detects adhesion of raindrops and determines the rainfall level. A wiper driving signal generation part 48 determines wiper operation based on the rainfall level determined by the rainfall level generation part 32 and the wiping level set by the wiping state control part 42.

Abstract: A wiper control method and a wiper control device which adjusts a wiping determining condition for determining the wiping state of a wiper according to a driving scene are provided. The driving scene is determined based on comprehensive situation determination from vehicle state information such as driving, stop, etc. and driving environment information such as rainfall state. According to the determined driving scene, the wiping determining conditions for determining the wiping state of the wiper is adjusted. Such wiping determining conditions include detection sensitivity of raindrops adhering on the detection surface, correspondence between the rainfall level and the wiping level, etc.

Abstract: A process for the preparation of lower olefins which comprises the step (A) of separating in a high-pressure state a mixed fluid (I) containing dimethyl ether (DME) and methanol at a specified ratio into a gas component (II) and a liquid component (III), separating the gas component (II) into an off-gas and DME, and then making this DME join the liquid component (III) to obtain a liquid component (IV) containing DME and methanol at a specified ratio and the step (B) of subjecting the liquid component (IV) to depressurization and then introducing it into a reactor for the preparation of olefins to form a lower olefin fraction (V). Lower olefins are prepared from a mixed fluid (I) containing DME and methanol at a specified ratio.

Abstract: Disclosed is a process for producing lower olefins, comprising: