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Breath alcohol content measurement device

A measuring instrument, content technology, applied in the direction of measuring device, diagnostic record/measurement, instrument, etc., can solve the problem of slow heating of the flow channel, and achieve the effect of rapid heating

Active Publication Date: 2013-01-02
DRAGER SAFETY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of the known breath alcohol content meters is that the heating of the flow channel is relatively slow due to the point-by-point heat input into the base body by means of the helical wire

Method used

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Experimental program
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Embodiment Construction

[0046] The breath alcohol meter 1 can be designed as a mobile meter for alcohol monitoring in road traffic or as a stationary device installed permanently in a motor vehicle ("interlock" device).

[0047] Measuring device 1 has a base body 2 with a flow channel 3 for guiding a flow of breathing air emitted by a person. At the upstream end of the flow channel 3 , the base body 2 is connected to an exchangeable nozzle 4 through which a person can blow his breathing air stream. Arranged in the flow channel 3 is a flow partition 5 with a circular cross section and a diameter of 3 mm to 4 mm, by means of which a pressure drop of the breathing air flow is brought about. The pressure drop is measured by means of a pressure sensor 6 which provides pressure measurement data for the control unit 7 .

[0048] The temperature sensor unit comprises at least one temperature measuring resistor 11 which is embedded in the base body 2 to determine the temperature of the breathing air flow and...

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Abstract

The invention relates to a breath alcohol content measurement device, which comprises a basal body comprising a flow channel for breath air flow, a replaceable nozzle which is used for absorbing the breath air flow from a person and is connected, at an upstream end portion of the flow channel, with the basal body, an alcohol sensor unit which is associated with the basal body and is used for measuring the alcohol content in the breath air flow, a temperature sensor unit for measuring the temperature of the breath air flow, a heating unit for heating the flow channel, ad a control unit which is used to process a measurement signal provided by the temperature sensor unit and to control the heating unit. The basal body and / or the alcohol content sensor unit are / is formed by conductive polymer materials at least in an area adjacent to the flow channel. Multiple contact electrodes are contacted at the basal body and / or the alcohol content sensor unit. Correspondingly, current flows through the contact electrodes via electric wires.

Description

technical field [0001] The invention relates to a breath alcohol content measuring instrument (Atemalkoholgehaltmessgeröt) with: a base body (Grundkörper) comprising a flow channel (Durchflusskanal) for a breath air flow (Atemluftstrom); A replaceable nozzle (Mundstueck) for the air flow, which is connected to the base body at the upstream end of the flow channel; with an alcohol sensor unit associated with the base body for measuring the alcohol content of the breathing air flow and with A temperature sensor unit for measuring the temperature of the breathing air flow; with a heating unit for heating the flow channel; with a control unit for processing the measurement signal provided by the temperature sensor unit and for controlling the heating unit. Background technique [0002] A breath alcohol content meter is known from DE 198 11 177 C2, which has a base body with a flow channel through which a flow of breathing air is guided and the alcohol content is measured by mean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/497
CPCG01N21/3504A61B2562/0271A61B5/082G01N33/0016G01N21/05G01N33/4972G01N21/0332A61B5/4845
Inventor B.施托克
Owner DRAGER SAFETY
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