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Lie-detecting device and method

An ultrasonic and transceiver technology, applied in the field of lie detection devices, can solve problems such as complex structure and inconvenient use, and achieve the effect of simplifying structure and ensuring reliability

Inactive Publication Date: 2011-03-30
蔺彬涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When in use, sensors need to be installed in multiple parts such as the chest and arms of the tested person, the structure is very complicated, and it is also very inconvenient to use

Method used

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  • Lie-detecting device and method
  • Lie-detecting device and method

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Embodiment Construction

[0013] The invention discloses a polygraph device, as shown in the accompanying drawings, comprising:

[0014] Ultrasonic transceiver, the ultrasonic transceiver sends ultrasonic signals and receives reflected ultrasonic signals;

[0015] The signal processing unit first processes the ultrasonic signal received by the ultrasonic transceiver to obtain heart beat frequency, respiratory rate and blood pressure change information.

[0016] The signal processing unit is a PC, and the ultrasonic transceiver is connected to the PC through a USB interface.

[0017] The frequency of the ultrasonic wave sent by the ultrasonic transceiver is 50KHz.

[0018] The present invention also discloses a lie detection method implemented by the above lie detection device,

[0019] The ultrasonic transceiver is arranged at the chest cavity of the person under test, and the ultrasonic transceiver sends ultrasonic signals to the heart and lungs of the person under test, receives the reflected ultra...

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Abstract

The invention discloses a lie-detecting device which comprises an ultrasonic transceiver and a signal processing unit, wherein the ultrasonic transceiver sends out ultrasonic signals and receives reflected ultrasonic signals; and the signal processing unit processes the ultrasonic signals received by the ultrasonic transceiver to obtain heartbeat frequency, respiratory frequency and information of blood pressure change. The invention also discloses a lie-detecting method for the device, which comprises the following steps: arranging the ultrasonic transceiver at the thoracic cavity of a testee to send out ultrasonic signals to the heart and the lungs of the testee and receive reflected ultrasonic signals; and using the signal processing unit to filter the received signals to obtain the lower respiratory frequency and the higher heartbeat frequency and further obtain information of blood pressure change based on the amplitude variation of heartbeat-frequency vibration. By using one ultrasonic transceiver to simultaneously acquire information of respiration, heartbeat and blood pressure of the testee, the invention ensures the information acquisition reliability, simultaneously the structure of the lie-detecting device is greatly simplified, and the operation is convenient and simple in use.

Description

technical field [0001] The invention relates to a polygraph device. The invention also relates to a lie detection method realized by using the lie detection device. Background technique [0002] What the respiration sensor of existing multi-channel psychological testing instrument (polygraph) adopts is " pulling sensitive resistance " principle, and some pulse sensors adopt " piezoresistance " principle and cuff type sphygmomanometer, and finger pulse infrared principle. . When in use, sensors need to be arranged in multiple parts such as the chest and arms of the person to be tested, and the structure is very complicated, and it is also very inconvenient to use. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a polygraph device and the polygraph method adopted by this polygraph device, which can adopt a simple structure to effectively collect various information required for polygraph detection, and it is very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/02A61B8/04A61B8/08A61B8/00A61B5/16
Inventor 蔺彬涛
Owner 蔺彬涛