Denso Corporation

Seiji Totsuka

Hiroshi Inou

Minoru Okada

Mamoru Sawada

Takehito Fujii

Hiroyuki Mishima

Teppei Miyake

Kenji Kudou

Mamuro Sawada

An acoustic apparatus mounted on a vehicle driven by a driver includes: acquiring unit for acquiring a gaze point at which the driver gazes while driving the vehicle, reflecting parameters including a location of the vehicle, a running state of the vehicle and a running environment of the vehicle; generation unit for generating a sound image in the vehicle; and localization unit for localizing the sound image to be at the gaze point.

Apparatus and method for localizing sound image for vehicle's driver

In a structure of an in-vehicle audio device, the audio system has an audio signal supplying section, an audio signal processing section, a balance adjustment section and an audio signal output section. A right audio signal processing section and a left audio signal processing section in the audio signal processing section perform a process of filtering audio signals supplied from the audio signal supplying section on the basis of a transfer function. The transfer function contains a head related transfer function H(s), a space transmission compensation function G0(s)and a vehicle height compensation function G1(s). The space transmission compensation function G0(s)is an inverse function of a space transfer function G0(s). A filtering process for the audio signal is performed by using the transfer function to guide a driver's visual line to be decreased when a vehicle height is high, and increased when the vehicle height is low.

In-vehicle audio device

In an obtainer for obtaining speed feeling of a driver of a movable object, a gaze point setter sets a gaze point of the driver, and a motion detector detects relative motion of an environmental field around the mobile object with respect to the mobile object. A divergent component calculator projects the relative motion of the environmental field in a coordinate system. The coordinate system is formed by modeling a retina sphere of the driver of the mobile object. The divergent calculator calculates each of divergent components of the projected relative motion of the environmental field radially expanding from the gaze point. A speed feeling calculator calculates speed feeling of the driver based on the divergent components of the projected relative motion of the environmental field radially expanding from the gaze point calculated by the divergent component calculator.

Apparatus for controlling speed of mobile object

In an apparatus for supporting drive of a mobile object, a curl component calculator projects relative motion of a environmental field in a coordinate system formed by modeling a retina sphere of a driver of the mobile object. The curl component calculator calculates each of rotational components of the projected relative motion of the environmental field around a corresponding driver's eye direction to the gaze point. A target trajectory setter sets, as a target trajectory of the mobile object, an equal-magnitude line connecting a part of the rotational components of the projected relative motion of the environmental field, the part of the rotational components having a same magnitude.

Apparatus for supporting drive of mobile object based on target locus thereof

An acceleration control system stores a target acceleration calculation equation acquired by transforming an equation that expresses that a product of the differentiation of the square power of the speed and the environmental factor &#x3b1;represents a sensed value &#x3b5; of acceleration. A surrounding environment monitor device detects surrounding bodies present in the forward periphery of the vehicle, and an environmental factor calculation unit calculates the environmental factor &#x3b1;by using the detected positions of the surrounding bodies. A target acceleration setting unit successively sets target accelerations ain compliance with the target acceleration calculation equation by using the environmental factor &#x3b1;. The acceleration is executed to match the driver's feeling.

Acceleration control system

An acceleration control system controls acceleration of a vehicle to match the driver's feeling. In this control, the vehicle is controlled so that acceleration remains constant at the initial stage and then a differentiated value of a square power of a vehicle speed remains constant. This control is based on the finding of a normal acceleration operation attained by a driver. A linear relation exists between the acceleration in the initial stage of acceleration and the differentiated value of the square power of the speed. Switching of control from the constant acceleration to the constant differentiated value of the square power of the speed is made at a change-over speed determined by the linear relation.

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Tokai, Japan

Seiji Totsuka