Interactive alcometry

A technology of accuracy and alcohol concentration, applied in sensors, diagnosis, applications, etc., can solve problems such as wasting time, technical troubles of drunkenness meters, and increasing costs

Active Publication Date: 2010-01-20
HOK INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Changing the mouthpiece for every measurement is time consuming and costly
The total time taken for one test in cold weather can be several minutes which is unacceptable e.g.
[0012] In conclusion, it can be concluded that the state of the existing intoxication meter technology is plagued by several problems, the central issues touched upon are related to accuracy, time consumption, convenience, reliability and cost

Method used

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  • Interactive alcometry
  • Interactive alcometry
  • Interactive alcometry

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0051] figure 1 The flowchart of contains multiple steps corresponding to the state of the device. Begins with device-started start position 1 generation and transitions directly to standby mode 2. Activation can be performed manually via an on / off button, or automatically by some other device connected to the device. During waiting mode 2, a stability test of the sensor signal corresponding to the alcohol concentration and the degree of dilution is carried out, respectively. If the sensor signal is disturbed in any way, the waiting process continues until stability is achieved.

[0052] When the above-mentioned criterion that the variation of the signal over time does not exceed a certain threshold S is met, the device transfers to measurement mode 3 . In this mode the tester can be commanded to exhale into the device's sensors, which are optionally positioned near his / her respiratory organs without the tester's active cooperation. Continue to perform the analysis of the...

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Abstract

The invention relates to method and apparatus for the determination of alcohol concentration of expired air. By visualising current or accumulated measuring value and error in real time during ongoing measurement, interactive control of alcohol determination is enabled with respect to accuracy and time lapse. Preferably the measurement is performed without contact with compensation for the dilution of the breath sample, which is performed by simultaneous measurement of temperature, concentration of water vapour or carbon dioxide. The method is divided into a stepwise procedure based on the dependence of the measuring error on the dilution of the expired air, and accumulated time, both being possible to influence by the test person or operator. Special advantages are being obtained at measurements relative to a concentration limit. The alcohol determination is preferably performed by means of absorption spectroscopy within the infrared wavelength range. The apparatus according to the invention includes sensors for the abovementioned entities, an electronic unit for signal and data processing, a presentation unit, and is embedded in a compact housing for handheld use or integration. The response time of the sensors should not exceed 0,5 seconds in order to fulfil the requirement of real time operation. The housing is controllably openable at measurement, and includes a measuring cell illuminated with collimated infrared radiation and means for active air flow.

Description

technical field [0001] The present invention relates to the determination of breath alcohol concentration and addresses the main aspects concerning measurement accuracy, response time and interaction between the measurement object or operator on the one hand and the measurement device on the other. Background technique [0002] Various methods and devices for alcometry, ie determination of the alcohol concentration in breath, are described in the literature. Some of these methods and devices are already in widespread use, both as measuring instruments and as control devices. Alcohol locks are an example of the latter, preventing the driver of a vehicle from starting the vehicle without a safe breath sample - i.e. an alcohol concentration not exceeding the prevailing concentration limit. [0003] In the alcohol meter, there are mainly two measurement principles, using the physical and chemical properties of alcohol. The latter category is mainly based on combustion mediated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/083G01N33/497G01N21/35G01N21/3577
CPCA61B5/0836A61B5/097G01N21/031G01N33/4972A61B5/082B60K28/06A61B5/0878G01N21/3504G01N21/15B60K28/063A61B5/4845A61B5/083G01N21/3577G01N33/497G01N21/35
Inventor B·赫克
Owner HOK INSTR
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