摘要:
Disclosed is a solid-state imaging device capable of calculating the difference in charge obtained by photoelectric conversion, and capable of a high level of integration. A solid-state imaging device is provided with an AD converter which is provided with: a first comparator which outputs a signal corresponding to a first analogue signal of a first pixel by comparing said first analogue signal with a reference voltage supplied from the reference voltage generation unit which generates a reference voltage which gradually changes; a second comparator which outputs a signal corresponding to a second analogue signal of a second pixel by comparing said second analogue signal with the reference voltage supplied by the reference voltage generation unit; a difference circuit which finds the difference between the signal corresponding to said first analogue signal and the signal corresponding to said second analogue signal and outputs a difference signal; and a counter circuit which counts the number of pulses in a pulse sequence corresponding to the aforementioned difference signal and converts said difference signal into a digital signal.
摘要:
An optical device ensuring projection of light over a wide range as well as reduction in size, and a mobile apparatus mounted with the optical device are provided. The optical device (100) includes a light-projecting unit (110) and a light-receiving unit (120). The light-projecting unit (110) has a projector (114) and a lenticular sheet (112) arranged in layers. First and second cylindrical lens arrays having their generatrices orthogonal to each other are formed on the respective surfaces of the sheet (112). The light-receiving unit (120) has a light-receiver (124). The light-projecting unit (110) and the light-receiving unit (120) are arranged adjacent to each other in an integrated manner so that the light-receiver (124) can sense the light emitted from the projector (114) via the sheet (112) and then reflected from an object.
摘要:
A cylinder-by-cylinder air-fuel ratio-estimating system for an internal combustion engine includes an air-fuel ratio sensor arranged in the exhaust system of the engine, at a confluent portion of the exhaust system. The air-fuel ratio of a mixture supplied to each of the cylinders is estimated based the output from the air-fuel ratio sensor, by using an observer for observing the internal operative state of the exhaust system based on a model representative of the behavior of the exhaust system. The air-fuel ratio at the confluent portion is estimated by using a delay parameter representative of the response delay of the air-fuel ratio sensor, and the air-fuel ratio of the mixture supplied to each of the cylinders is estimated by using the estimated air-fuel ratio at the confluent portion. The estimated air-fuel ratio of the mixture supplied to each of the cylinders is subsequently used for estimating a value of the air-fuel ratio at the confluent portion of the exhaust system.
摘要:
A fuel metering control system for an internal combustion engine including feedback loop having an adaptive controller and an adaptation mechanism that estimates a controller parameters .theta.. The adaptive controller corrects the quantity of fuel injection to bring a controlled variable at least obtained based on an output of said air/fuel ratio sensor to a desired value. The adaptation mechanism is input with the controlled variable once per prescribed crank angle such as a TDC of a certain cylinder of a four-cylinder engine and estimates the controller parameters (vector) such that the adaptive controller is operated to synchronize with every 4 prescribed crank angle such as every TDC of all cylinders of the internal combustion engine, or with every prescribed crank angle such as every TDC. With the arrangement, the system enables adaptive control of a commercially practical internal combustion engine without degrading control performance.
摘要:
A fuel injection control system for an internal combustion engine calculates an amount of fuel to be injected in a manner carrying out fuel transfer delay-dependent correction based on a delay of transfer of fuel injected from the time the fuel is injected into the intake passage of the engine to the time the fuel is drawn into a corresponding one of an at least one cylinder of the engine, with a predetermined calculating repetition period, and causes fuel injection to be carried out based on a result of the calculation. The amount of fuel to be injected is corrected during execution of the fuel injection based on a newest value of the result of the calculation.
摘要:
According to the present invention, a catalyst composition for use in cracking hydrocarbon can be prepared by spray drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide with a hot air of 350.degree.-700.degree. C. in a short time within 5 seconds, kaolin, a precursor substance of a silica-system matrix and a crystalline aluminosilicate. Since this catalyst composition contains the flash calcined alumina and kaolin in addition to the siliceous matrix and the crystalline aluminosilicate, it can exhibit an excellent selectivity for production of intermediate fractions such as kerosene, gas oil and the like, when used for catalytic cracking of hydrocarbon.
摘要:
A two-stage process for hydrotreating asphaltenes and metallic contaminants-containing heavy hydrocarbon oils which comprises a demetallization step using a catalyst composition which is smaller in pore size and less in active metal amount than the conventional demetallization catalysts, and a hydrotreating step using a catalyst composition which is larger in pore size and more in active metal amount than the conventional hydrodesulfurization catalysts or hydrocracking catalysts, said hydrotreating step being located downstream of said demetallization step.
摘要:
Provided is a walking assist device including a seat member, a leg link having a joint portion, and a driving source for the joint portion. The walking assist device allows a user to rest by sitting on the seat member. Accordingly, the walking assist device further includes a lock mechanism disposed in the joint portion and an operation unit for the lock mechanism. When the operation unit is switched on, the driving source is controlled to increase an up-pushing force on the seat member. A variation rate on the up-pushing force is increased with time to a given value where the lock mechanism is initiated.
摘要:
Provided is a catalyst composition for the isomerization of n-paraffin which comprises a β-zeolite having been synthesized according to a dry gel process and contains cerium, the β-zeolite being characterized in that it has an average particle diameter of 0.01˜0.1 μm and the proportion of the cerium in the β-zeolite is within the range of 0.001˜0.2 in terms of the atomic ratio of the silicon atom in the β-zeolite to the cerium atom, i.e. [Ce]/[Si] as well as a process for isomerizing n-paraffin which comprises bringing n-paraffin into contact with the catalyst composition as set forth above.
摘要:
A landing shock absorbing device 18 provided in a foot mechanism 6 of a leg of a robot comprises an inflatable and compressible bag-like member 19 (a variable capacity element) on a bottom face side of the foot mechanism 6. The bag-like member 19 is constructed of an elastic material such as rubber. Air in the atmosphere can flow into and out of the bag-like member 19 by inflow/outflow means 20 provided with a solenoid valve 27 and the like. In a landing state of the foot mechanism 6 and in a state immediately after the foot mechanism shifts from the landing state to a lifting state, the solenoid valve 27 is closed to maintain the bag-like member 19 in a compressed state. Furthermore, during the bag-like member 19 in the inflating state during the lifting state of the foot mechanism 6, by controlling timing when the solenoid valve 27 is switched from a valve opening state to a valve closing state, a height of the bag-like member 19 in a compression direction is controlled to be a height suitable for a gait type of the robot. Thereby, posture stability of the robot can be secured easily while reducing a impact load in the landing motion of the leg of the legged mobile robot, and further, a lightweight configuration can be achieved.