Vehicle sobriety interlock device
First Claim
1. A sobriety interlock device having an output coupled to a starter mechanism of a motorized vehicle for detecting the presence of alcohol in a breath sample introduced into the device and for controlling the device output in response to a predetermined threshold level being exceeded, the sobriety interlock device comprising:
- a) a handset having a gas intake channel for receiving the breath sample, b) a breath sampling housing enclosed within the handset and having a gas sampling channel in axial alignment with the handset gas intake channel, c) a fuel cell positioned along the gas sampling channel of the breath sampling housing for measuring an alcohol vapor value of the breath sample, d) a pressure transducer located within the handset in fluid communication with the gas sampling channel of the breath sampling housing for measuring a pressure value of the breath sample, e) a microprocessor located within the handset in electrical communication with the fuel cell and the pressure transducer, the microprocessor containing an executable algorithm for determining a measured blood alcohol content of the breath sample through an offset adjustment of the measured alcohol vapor value in relation to the measured breath sample pressure value, the microprocessor applying a signal to the output of the interlock device dependent on the results of the measured blood alcohol content as compared to the predetermined threshold level; and
f) a power source coupled to the handset.
9 Assignments
0 Petitions
Accused Products
Abstract
An interlock device for measuring the sobriety of a potential vehicle operator is coupled to the starting mechanism of the vehicle. The interlock device includes a microprocessor controlled handset and base unit. The base unit encloses relays to preclude the starting mechanism from engaging if a predetermined acceptable threshold level of blood alcohol content has been exceeded. The relays receive a signal, through the base unit microprocessor, from the handset microprocessor which has calculated the blood alcohol content of a breath sample introduced into the handset by the vehicle operator. A breath sampling housing is enclosed within the handset in axial alignment with an intake port of the handset. A water filter and valve are positioned upstream from an electrochemical fuel cell. The fuel cell is coupled to the microprocessor. A pressure transducer measures the pressure of the breath sample. The handset microprocessor calculates a pressure offset through an algorithmic equation and applies the offset to the variable reading across the fuel cell to provide a normalized blood alcohol content measurement.
85 Citations
40 Claims
-
1. A sobriety interlock device having an output coupled to a starter mechanism of a motorized vehicle for detecting the presence of alcohol in a breath sample introduced into the device and for controlling the device output in response to a predetermined threshold level being exceeded, the sobriety interlock device comprising:
-
a) a handset having a gas intake channel for receiving the breath sample, b) a breath sampling housing enclosed within the handset and having a gas sampling channel in axial alignment with the handset gas intake channel, c) a fuel cell positioned along the gas sampling channel of the breath sampling housing for measuring an alcohol vapor value of the breath sample, d) a pressure transducer located within the handset in fluid communication with the gas sampling channel of the breath sampling housing for measuring a pressure value of the breath sample, e) a microprocessor located within the handset in electrical communication with the fuel cell and the pressure transducer, the microprocessor containing an executable algorithm for determining a measured blood alcohol content of the breath sample through an offset adjustment of the measured alcohol vapor value in relation to the measured breath sample pressure value, the microprocessor applying a signal to the output of the interlock device dependent on the results of the measured blood alcohol content as compared to the predetermined threshold level; and
f) a power source coupled to the handset. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
4. The sobriety interlock device of claim 4, wherein the predetermined period of time that the solenoid valve opens is in the range of 100 to 700 mS, the microprocessor sending a control signal to open and close the solenoid valve.
-
19. A sobriety interlock device having an output coupled to a starter mechanism of a motorized vehicle having a power source, the interlock device measuring the blood alcohol content of a vehicle operator by detecting the presence of alcohol in a breath sample introduced into the device by the operator, the interlock device output effected in response to a predetermined threshold level being exceeded, the interlock device coupled to the vehicle power source, the sobriety interlock device comprising:
-
a) a handset having a gas intake channel for receiving the breath sample of the vehicle operator, the gas intake channel having an entrance port and an exhaust port formed through the handset, b) a breath sampling housing enclosed within the handset and having a gas sampling channel in axial alignment with the handset gas intake channel positioned intermediate the handset gas intake channel entrance and exhaust ports, c) a fuel cell positioned along the gas sampling channel within the breath sampling housing for measuring an alcohol vapor value of the breath sample of the vehicle operator, d) a pressure transducer in fluid communication with the gas sampling channel of the breath sampling housing for measuring a pressure value of the breath sample of the vehicle operator, the pressure transducer having an air entrance port, e) a microprocessor coupled to the fuel cell and the pressure transducer, the microprocessor containing an executable algorithm for determining the blood alcohol content of the vehicle operator from the breath sample introduced into the interlock device wherein an offset adjustment is made to the measured alcohol vapor value in response to the measured breath sample pressure value, the microprocessor applying a signal to the output of the interlock device dependent on the results of the measured blood alcohol content as compared to the predetermined threshold level; and
f) a base unit enclosing the interlock device output coupled to the handset. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A vehicle sobriety interlock device for measuring the blood alcohol content of a vehicle operator by detecting the presence of alcohol in a breath sample introduced into the device by the operator, the interlock device mounted within close proximity of a driver'"'"'s seat of a vehicle, the interlock device comprising:
-
a) a handset having a gas intake channel for receiving the breath sample of the vehicle operator, the gas intake channel having an entrance port and an exhaust port formed through the handset, b) a breath sampling housing enclosed within the handset and having a gas sampling channel in axial alignment with the handset gas intake channel positioned intermediate the handset gas intake channel entrance and exhaust ports, c) an electrochemical fuel cell positioned along the gas sampling channel within the breath sampling housing for measuring an alcohol vapor value of the breath sample of the vehicle operator, d) a pressure transducer connected along the gas sampling channel of the breath sampling housing by a capillary tube, the pressure transducer measuring a pressure value of the breath sample of the vehicle operator, e) a solenoid valve positioned upstream from the fuel cell in fluid communication with the gas sampling channel of the breath sampling housing, the solenoid valve limiting the size of the breath sample across the fuel cell by remaining open for a predetermined amount of time, f) a microprocessor coupled to the fuel cell, the pressure transducer and solenoid valve, the microprocessor containing an executable algorithm for determining the blood alcohol content of the vehicle operator from the breath sample introduced into the interlock device wherein an offset adjustment is made to the measured alcohol vapor value in response to the measured breath sample pressure value, the microprocessor enclosed within the handset, g) a base unit enclosing an output of the interlock device, the base unit communicating with the microprocessor within the handset, the output precluding a starter mechanism of the vehicle from engaging if a signal received from the handset microprocessor has determined that the blood alcohol content of the breath sample of the vehicle operator exceeds a predetermined threshold level; and
h) a power source coupled to the handset and the base unit. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
-
-
40. A sobriety interlock device having an output coupled to a computing device, the sobriety interlock device detecting the presence of alcohol in a breath sample introduced into the device and for controlling the device output in response to a predetermined threshold level being exceeded, the sobriety interlock device comprising:
-
a) a handset having a gas intake channel for receiving the breath sample, b) a breath sampling housing enclosed within the handset and having a gas sampling channel in axial alignment with the handset gas intake channel, c) a fuel cell positioned along the gas sampling channel of the breath sampling housing for measuring an alcohol vapor value of the breath sample, d) a pressure transducer located within the handset in fluid communication with the gas sampling channel of the breath sampling housing for measuring a pressure value of the breath sample, e) a microprocessor located within the handset in electrical communication with the fuel cell and the pressure transducer, the microprocessor containing an executable algorithm for determining a measured blood alcohol content of the breath sample through an offset adjustment of the measured alcohol vapor value in relation to the measured breath sample pressure value, the microprocessor applying a signal to the output of the interlock device dependent on the results of the measured blood alcohol content as compared to the predetermined threshold level; and
f) a power source coupled to the handset.
-
Specification