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Object detection apparatus and method

An object detection and signal technology, applied in measurement devices, radio wave measurement systems, sound wave re-radiation, etc., can solve the problems of non-alarming and inconsistency of objects, improve robustness, simple structure, and reduce implementation costs and complexity. Effect

Active Publication Date: 2016-02-10
HYUNDAI MOBIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] that is, Figure 4 As shown, the time of flight (TimeofFlight; ToF) 1 of the first signal transmission is inconsistent with the ToF2 of the second signal transmission, so it often happens that there are objects but no alarm

Method used

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  • Object detection apparatus and method
  • Object detection apparatus and method
  • Object detection apparatus and method

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Embodiment Construction

[0050] The advantages, features and implementation methods of the present invention can be clarified with reference to the accompanying drawings and the embodiments described below. However, the present invention is not limited to the embodiments disclosed below, but is realized in different forms. This embodiment only makes the disclosure of the present invention more complete, so that those of ordinary skill in the technical field of the present invention can easily understand the principles of the present invention Category, the present invention is defined by the category of technical solutions. In addition, the terminology used in this specification is for describing an Example, and does not limit this invention. Unless otherwise mentioned in the sentences of this specification, the singular also includes the plural. The term "comprises" and / or "comprising" used in the specification means that the described constituent elements, steps, actions and / or elements do not excl...

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Abstract

Provided are an object detection apparatus and method. The object detection apparatus includes an amplifier configured to amplify a reflected ultrasonic wave signal with a variable gain, a gain controller configured to set the variable gain such that the reflected ultrasonic wave signal received in at least one predetermined time zone is amplified with a high gain, compared to in other time zones, a comparator configured to compare a signal on an envelope corresponding to the signal amplified by the amplifier with a predetermined threshold and output the signal on the envelope when the signal is greater than the threshold, a calculator configured to calculate an absolute value of a first-order differential value of the signal on the envelope, and a time at which a maximum of the absolute value of the first-order differential value is calculated, and a detector configured to detect an object using a third time, the third time being a time at which the maximum is calculated, before a second time, the second time being a time at which the signal greater than the threshold is output.

Description

technical field [0001] The invention relates to an object detection device and its method, in particular to an object detection device and its method which use variable gain to amplify reflected waves to detect objects. Background technique [0002] Ultrasonic devices for existing vehicles such as figure 1 As shown, the electronic signal generated by the pulse generating device is converted into an ultrasonic wave by a transducer (Transducer), and the ultrasonic wave sent by the transducer is reflected by the surface of the object and then converted into an electronic signal in the transducer. [0003] In addition, the electronic signal at the level of several uV converted by the converter is amplified to a signal at the level of several V by an amplifier (Amp) before being converted into a digital signal. However, the ultrasonic signal for vehicles is 20 kHz to 100 kHz, which is above the audible frequency, so the signal amplified to improve the signal-to-noise ratio of th...

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Application Information

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IPC IPC(8): G01S15/42G01S15/931
CPCG01S15/42G01S7/527G01S15/10G01S7/529G01S15/931G01S15/08
Inventor 李在永
Owner HYUNDAI MOBIS CO LTD