DE2325400A1 - MODULATION CONTROLLED SYSTEM TO PREVENT BREAKING THE RESPIRATORY DEVICE - Google Patents

Description

DIPL.-ING. R. SPLANEMANN dipl-chem. dr. B. REITZNER - dn => l.-ing. J, JUDGE

MUNICH HAMBURG

«Ti« JU- 18 ■ »May 1973

Borg-Warner Corporation _β00 ο munchen ₂

200 South Michigan Avenue ■ τϊόίΐη toen). 22 «207/226209

, __. «Telegrams: Inventius Munich

Chicago ₉ Illinois (V.StoAo *

1314-I- 8248

Patent application

f ^for prevention

circumvention of

The invention relates to a system for preventing the circumvention or deception of Alicohoi breath test devices o

The invention is particularly suitable for the breath testing devices described in patent application P 22 18 166ο4 ~ 52 2 218 166 is intended as a rope of the present description are valid"

The general state of the ffechnikp on which the invention is based is given in the above-mentioned Offen = - legendsschrift stated "The special task of the Yorliegendsn invention is to a bypass of the unsupervised breathing apparatus? ZoB. a breath tester according to the patent application P 22 18 166ο4 - = - 52 (, by "that a person has a

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Bellows or an air bag used ₉ instead of your AtsiTi in the tester jsu blow ,, au ¥ erhindern

? Sin such a system for use with a Atemprüfgerät contains e: finäungsge $ AAESS a Energieumwaadler ₉ of the fin of the tester Ateiaeingangseinheit '"receiveserzeugten.'Schallwellen and this into an electrical"-'"Signal converts _p devices (e» Bo a filter) f dio connected to the energy converter "are the sindj Md able to Anweaenheit or absence vqw requenaen Audi of about _erlcennen? and Koßtrollctm'ierungenj, who in the absence of Fi ^ isuehsea chose a pass of the exam

Further advantageous® embodiments of the invention are described below using the ■ drawing », The same elements are shown in the individual figures. the same Besugsaalileh beseichneto.

Figo T shows a perspective view of an Ateraeiiigangs * unit sines Atefeprüfgeräta according to the invention ^ some TGi3.e vreg broken down to Inner su

fig. 2 shows a block diagram of the system according to the invention? and

3 shows a diagram of details of part of the system according to FIGS. 1 and 2 _P, partly in block form and partly in circuit form.

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In Figure 1, a breathing input unit TO is shown "downstream of the Ateiaeingangsöffnuag 1,2 contains a Sehallumwandler 14 according to the invention / which is connected by the wires 16 to the remaining elements of the system according to the invention." This system is explained in Figure 2 and with the general Basugsaahl 20 Teraehen. Ba3 Ausgangesignal of Umvrandlers H is amplified by an amplifier 18 and passed to a filter 22 ,, dss a3, e means öieate to Syrian the presence or absence of the required frequencies au differ ₀ For example, the PiIter Audiofrequenaolgnale under hall) 50 Hz and above 500 Hss practically suppressed, so that the user of the responder has to emit a weak buzzing tone "In this pail, the absence of such a suram tone would mean" that practically no signal is allowed to pass through the filter. The signals which have passed through the filter 22 are amplified by the amplifier 24- ^ - ^p and passed to a control or control circuit 26- which prevents the person being examined from generating a "beatand" signal.

The circuit 26 optionally contains a display element 28 ₉ s _o Bo a lamp _? which indicates whether the correct son is available ο

For the general system in which system 20 operates, see the patent application P 22 18 166 <»4 = 52 referenced. This system contains a pressure switch and a timer "- A part von Pigur 5 of said patent application is in Figure 5 of the present application shown. the end

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Figure 5 gives 8I ₉ that the timer 62 are unchanged for the blowing and the Brückeehalter 60, but that the mass of that switch is grounded via the circuit according to the invention 26 _P namely via the collector-emitter circuit of transistor eißaa 26A. The collector of the transistor 26A is also connected to one connection of the liarape 28, the other connection of which is connected via a line 260 to the connection line between IC4B and K2 (a convenient positive potential source) ",

The base of the transistor 26Λ is parallel via a switched resistor 26B and a capacitor 26C grounded and connected to the signal through a diode 26D dom amplifier 24 connected »

About the rest of the circuit and how the execution form works according to the patent application P 22 .18 166 «4-52 can remain unchanged5 also the description of this Embodiment is intended to be part of the present Form registration <,

It is maintained (5 seconds s.Bo) a suitable Pruck over a sufficiently long period of time, au win a deep ausgeatiaeto breath sample of the subject "In the present system, the further condition hinau _r is the output signal from the circuit 26 _p, the circumvention the system is intended to prevent _c over the specified period is also present. If both signals are not present during this period, the test is considered to have failed and no "passed ^!" Signal can be obtained.

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Although freezing just a simple .Filter "is tert Xäu-j can also koiaplisierter © Eisnriefetungea and -plJLssiertere- äicuBtisclie signals ang oh ^ s that the general Erfiiidungsgedaratee will be ver" bsis ^ ielsweis © feöanoa _ρ over predetermined intervals u.ie duroli Another signal lamp can be sawn ""

DOS 2 218

309860 / M

Claims (1)

f 1 oj system for reducing dej? Bypassing Ätemprüf- ^ - ^ advised with a breathing input unit, _{P is} introduced into the breath by a BnergleuiHviaiidlsr (14)? the dia receives acoustic signals emitted at the respiratory output unit of the device and these signals are converted into electrical signals © imwanöelti devices (22) to distinguish between the signal _β which are connected to the energy converter for receiving the electrical signal and which are able to do so * Detect the presence or absence of certain signals coming from the energy converter5 and control devices (2S) ₉ that are connected to the subdivision unit (22) and prevent the preselected signals from the subdivision unit in the absence of 9TOYi from passing the test, 2ο system according to claim 1, characterized in that _p that the ünterschsidungseinriohtung (22) represents a filter circuit and that the system to the signals', that pass through the Pilterkreis, über.eine predetermined © period responsive ₉ when the breath test to be passed " R / hi 303850/11