IP Library › Granted Patent US 12,241,879
Granted Patent B2
US 12,241,879 · App. 17/129,432 · Granted Mar 4, 2025

Reference gas management in a breath alcohol calibration station

Inventors: Douglas Edward DeVries (Johnston, IA); Scott Ruland (Kansas City, MO)
Assignee: Consumer Safety Technology, LLC
G01N33/0006G01N33/4972
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Quick Facts
Patent No.
US 12,241,879
App. No.
17/129,432
Granted
Mar 4, 2025
Kind
B2
Abstract

A breath alcohol device calibration system includes a computerized calibration module operable to calibrate a candidate breath alcohol device using a reference gas of known alcohol concentration, and a reference gas tank identification module operable to identify a reference gas tank that is coupled to the breath alcohol device calibration system. Identification is performed using at least one distinguishing characteristic of the coupled tank, the distinguishing characteristic providing reference gas tank information including at least the known alcohol concentration of gas in the reference gas tank. The reference gas tank identification module is further operable to read a temperature history of the tank from an electronic device coupled to the tank, and to indicate an error condition if the temperature history of the tank indicates temperatures below a first temperature threshold over the tank's recent temperature history to potentially result in incomplete mixing of the reference gas.

Claims (42)

1. A breath alcohol device calibration system, comprising:

a receptacle configured to receive a reference gas having a reference alcohol concentration from a cylindrical reference gas tank and to couple to the reference gas tank, wherein the reference gas tank is operable to hold the reference gas at a pressure greater than atmospheric pressure;

an electronic label device coupled to the reference gas tank, the electronic label device comprising a memory, the electronic label device further comprising a temperature measurement device thermally coupled to a body of the reference gas tank, the electronic label device configured to measure temperature history data about a temperature history of the body of the reference gas tank via the temperature measurement device and to electronically store the temperature history data in the memory, wherein the temperature history data comprises a series of temperature measurements over time;

a reader device to read the temperature history from the electronic label device;

a sealed gas interface configured to attach to a sampling port of a candidate breath alcohol device for calibration;

a valve in fluid communication with the receptacle to control a flow of the reference gas from the reference gas tank to the sealed gas interface;

a computer controller operating to:

control the reader device to read the temperature history data of the reference gas from the electronic label device coupled to the reference gas tank;

calibrate an alcohol detection element of the candidate breath alcohol device using the reference gas; and

determine whether a tank temperature is above a warm temperature threshold and has a rate of temperature change less than a threshold rate of temperature change.

2. The breath alcohol device calibration system of claim 1 , wherein a threaded valve portion of the reference gas tank threads onto the receptacle as the reference gas tank is rotated into a coupled position, wherein the reader device reads the electronic label device as the reference gas tank is rotated into the coupled position with the receptacle or after the reader device is in the coupled position.

3. The breath alcohol device calibration system of claim 1 , further comprising a tank mount configured to support the reference gas tank when the reference gas tank is coupled to the receptacle.

4. The breath alcohol device calibration system of claim 3 , wherein the reader device is positioned on the tank mount.

5. The breath alcohol device calibration system of claim 1 , wherein the valve is an electrically-actuated valve, wherein the computer controller is operable to open and close the electrically-actuated valve to control the flow of the reference gas from the reference gas tank to the candidate breath alcohol device via the sealed gas interface, thereby delivering the reference gas to the candidate breath alcohol device during calibration, wherein the computer controller is programmed not to open the valve until the reference gas tank temperature has been above a temperature threshold for a sufficiently long time for any condensed ethanol to re-evaporate into the reference gas.

6. The breath alcohol device calibration system of claim 1 , wherein the reader device comprises at least one of a camera, a radio frequency antenna, or an optical scanner to read the electronic label device coupled to the reference gas tank.

7. The breath alcohol device calibration system of claim 1 , wherein the computer controller is operable to read the temperature history from the electronic label device through at least one of radio frequency coupling or conductive coupling between the reader device and the electronic label device.

8. The breath alcohol device calibration system of claim 1 , wherein the computer controller is further operable to report an error condition associated with the temperature history data of the reference gas.

9. The breath alcohol device calibration system of claim 8 , wherein the computer controller reports the error condition based on whether the temperature history data indicates a temperature below a cold temperature threshold.

10. The breath alcohol device calibration system of claim 1 , wherein the computer controller is further operable to measure a pressure of the reference gas in the reference gas tank, and to use the temperature history data read from the electronic label device and the measured pressure compared to an expected pressure for the reference gas tank to determine whether the reference gas tank may have been opened while a temperature of the reference gas tank was impermissibly low.

11. The breath alcohol device calibration system of claim 1 , the computer controller further configured to indicate whether the temperature history of the reference gas tank permits safely opening the reference gas tank without potentially altering the reference alcohol concentration of the reference gas.

12. A method of operating a breath alcohol device calibration system, comprising:

providing a reference gas tank containing a reference gas having a reference alcohol concentration, wherein the reference gas tank comprises an electronic label device coupled to the reference gas tank, the electronic label device storing the reference alcohol concentration, the electronic label device configured to measure temperature history data about a temperature history of a body of the reference gas tank and to electronically store the temperature history data in a memory of the electronic label device, wherein the temperature history data comprises a series of measurements over time;

coupling the reference gas tank with a receptacle of the breath alcohol device calibration system such that the receptacle can receive the reference gas from the reference gas tank through a valve;

reading, using a computer controller, the temperature history data from the electronic label device;

determining, by the computer controller of the breath alcohol device calibration system, whether the temperature history data of the reference gas tank indicates temperatures below a first temperature threshold over the temperature history of the reference gas tank;

reporting, by the computer controller, an error condition based on whether the temperature history data of the reference gas indicates a temperature below the first temperature threshold in the temperature history data; and

indicating, by the computer controller, whether the temperature history data of the reference gas tank permits safely opening the reference gas tank without potentially altering the reference alcohol concentration of the reference gas.

13. The method of operating a breath alcohol device calibration system of claim 12 , comprising:

coupling a candidate breath alcohol device to the breath alcohol device calibration system such that a sampling port of the candidate breath alcohol device interfaces with a sealed gas interface of the breath alcohol device calibration system; and

calibrating an alcohol detection element of a candidate breath alcohol device using the reference gas.

14. The method of operating a breath alcohol device calibration system of claim 12 , further comprising determining, by the computer controller, whether the reference gas tank temperature is above a warm temperature threshold and has a rate of temperature change less than a threshold rate of temperature change to indicate complete mixing of the reference gas.

15. The method of operating a breath alcohol device calibration system of claim 12 , wherein coupling the reference gas tank with the receptacle comprises rotating a threaded valve portion of the reference gas tank into the coupled position with the receptacle, wherein reading of the electronic label device takes place as the reference gas tank is rotated into the coupled position with the receptacle or after the reference gas tank is in the coupled position.

16. A breath alcohol device calibration system, comprising:

a receptacle configured to receive a reference gas having a reference alcohol concentration from a cylindrical reference gas tank and to couple to the reference gas tank, wherein the reference gas tank is operable to hold the reference gas at a pressure greater than atmospheric pressure;

an electronic label device coupled to the reference gas tank, the electronic label device comprising a memory, the electronic label device further comprising a temperature measurement device thermally coupled to a body of the reference gas tank, the electronic label device configured to measure temperature history data about a temperature history of the body of the reference gas tank via the temperature measurement device and to electronically store the temperature history data in the memory, wherein the temperature history data comprises a series of temperature measurements over time;

a reader device to read the temperature history from the electronic label device;

a sealed gas interface configured to attach to a sampling port of a candidate breath alcohol device for calibration;

a valve in fluid communication with the receptacle to control a flow of the reference gas from the reference gas tank to the sealed gas interface;

a computer controller operating to:

control the reader device to read the temperature history data of the reference gas from the electronic label device coupled to the reference gas tank;

calibrate an alcohol detection element of the candidate breath alcohol device using the reference gas; and

measure a pressure of the reference gas in the reference gas tank, and to use the temperature history data read from the electronic label device and the measured pressure compared to an expected pressure for the reference gas tank to determine whether the reference gas tank may have been opened while a temperature of the reference gas tank was impermissibly low.

Assignments (2)
SECURITY INTEREST Recorded Nov 1, 2022
From: CONSUMER SAFETY TECHNOLOGY, LLC; ALCOHOL DETECTION SYSTEMS TECHNOLOGY, LLC
To: ARES CAPITAL CORPORATION
Reel/Frame 061617/0407 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 26, 2021
From: DEVRIES, DOUGLAS EDWARD; RULAND, SCOTT
To: CONSUMER SAFETY TECHNOLOGY, LLC
Reel/Frame 055435/0361 →
Continuity (2)
Continuation 15261231 · Sep 9, 2016
Related Publication 20210109072A1 · Apr 15, 2021
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