JP3161065B2 - Alcohol concentration storage device and alcohol concentration prediction time display device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alcohol concentration storage device for storing the concentration of alcohol in exhaled breath, and to an alcohol concentration prediction time display device for displaying a predicted time at which a predetermined concentration is reached by using the device.

[0002]

2. Description of the Related Art Conventionally, as a device for displaying the alcohol concentration in breath, those disclosed in Japanese Patent Application Laid-Open Nos. 56-125686 and 60-114951 have been proposed. In the former method, the relationship between the elapsed time and the alcohol concentration in the breath is determined in advance by experiment and stored in a memory, and the alcohol concentration stored in this memory is compared with the alcohol concentration of the detected subject. I do. Then, based on the comparison result, the time when the alcohol concentration in the breath of the subject becomes a safe concentration is predicted and displayed.

[0003] On the other hand, in the latter, the limit of alcohol intake obtained by the subject through experience of drinking is preset as an alcohol concentration. Is displayed to indicate the current degree of sickness.

[0004]

However, the relationship between the concentration of alcohol contained in exhaled breath and time differs depending on the individual's ability to digest alcohol. In other words, the alcohol concentration in expiration decreases in a short time for those who have excellent alcohol digestion ability, whereas the alcohol concentration in expiration decreases for those who have poor alcohol digestion ability for a long time. Cost. Therefore, in the above-described conventional apparatus, if the time at which the concentration becomes a safe concentration is predicted based on the relationship between the elapsed time and the alcohol concentration obtained in the experiment as in the former case, the error due to the difference in the alcohol digestibility of each individual is remarkable. Will happen. Also, in the latter case, you can only know the current state of sickness,
It is not possible to know how the alcohol concentration of oneself changes in relation to the time after drinking, and predicts when safe driving becomes possible, for example, when driving after drinking It was impossible to do.

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems, and an alcohol concentration storage device suitable for calculating a predicted time such as a safe concentration or a maximum concentration according to individual differences, and a method of using the same. It is an object of the present invention to provide a predicted alcohol concentration time display device.

[0006]

According to the first aspect of the present invention, there is provided an alcohol concentration detecting means for detecting an alcohol concentration in exhaled breath, and an alcohol concentration detecting means for detecting the alcohol concentration. A concentration storage means for storing concentration data indicating the alcohol concentration and time data indicating the detection time or detection time in a paired relationship.

In the invention according to a second aspect, an alcohol concentration detecting means for detecting an alcohol concentration in breath, a mode selecting means for selectively setting a concentration registration mode and a concentration detection mode, When a concentration registration mode is set, concentration storage means for storing concentration data indicating the alcohol concentration detected by the alcohol concentration detection means and time data indicating the detection time or detection time in a paired relationship, In the state where the concentration detection mode is set, the alcohol concentration detected by the alcohol concentration detection means at any detection time or detection time is compared with the alcohol concentration at the corresponding detection time or detection time stored in the concentration storage means. Calculating a maximum concentration prediction time or a safe concentration prediction time based on a comparison result obtained by the comparison unit. A calculation unit that, and a display means for displaying the calculated result by the calculated detection means.

[0008]

According to the first aspect of the present invention, when the alcohol concentration detecting means detects the alcohol concentration in the breath, the concentration storing means stores the concentration data indicating the detected alcohol concentration and the time data indicating the detection time or the detection time. And are stored in pairs. Therefore, by detecting the alcohol concentration at a plurality of times by the alcohol concentration detecting means and storing the detected alcohol concentration in the concentration storage means, it is possible to calculate the predicted time such as the safe concentration or the maximum concentration according to the individual difference.

According to the second aspect of the present invention, a concentration registration mode is first set, and in this concentration registration mode, the alcohol concentration in breath at a plurality of time points is detected by an alcohol concentration detecting means. Concentration data indicating the detected alcohol concentration and time data indicating the detection time or the detection time are stored in the concentration storage means in a paired relationship.

Next, a concentration detection mode is set, and the alcohol concentration in the breath is detected by the alcohol concentration detection means at an arbitrary detection time or detection time. Then, the comparison unit compares the alcohol concentration with the alcohol concentration at the corresponding detection time or detection time stored in the concentration storage unit. If the detected alcohol concentration and the stored alcohol concentration are the same, for example, as a result of the comparison by the comparison means, the alcohol concentration of the subject is determined by the detection time or detection time stored in the storage means in advance. Is expected to change with a change characteristic similar to the alcohol concentration corresponding to.

Therefore, the calculating means calculates the maximum concentration prediction time at which the alcohol concentration in the breath will be the maximum based on the comparison result of the comparison means, or the safety concentration prediction time at which the alcohol concentration in the breath becomes equal to or less than a predetermined value. Is calculated, and the calculated estimated times are displayed by the display means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. That is, in this embodiment, the present invention is applied to an electronic wristwatch. As shown in FIG. 1, a watch case 1 is mounted on an arm band 2 and a display unit 3 made of an LCD is provided on the upper surface thereof. Have been. On one side of the watch case 1 orthogonal to the wrist band 2, a registration start / end switch 4 operated when instructing start and end of a registration mode, which will be described later, is operated when starting the measurement mode. Measurement switch 5, clock mode each time it is operated →
There are provided a mode setting switch 6 for setting each mode in the order of the registration mode → the measurement mode, and another switch 7 operated when instructing execution of other processing such as time change.

A wedge 8 is provided on one side of the watch case 1 along the wrist band 2. The wedge 8 has a unit of one cup (about 200 cc). A number of cups switch 9 for inputting the number of drinks and a gas sensor 10 are provided. The gas sensor 10
Is a known semiconductor gas sensor using a thin film of tin oxide. The alcohol concentration in the breath is detected by a change in electric resistance when alcohol molecules in the blown breath are adsorbed without tin oxide. It is to be noted that, when the above-described number-of-cups switch 9 is turned on in the state of the registration mode or the measurement mode, the on-state is maintained until the mode ends.

FIG. 2 is a block diagram showing a circuit configuration of the electronic wristwatch.
2 is a central processing unit that controls various units based on a microprogram stored in the ROM 13 in advance and performs various processes such as a clock process, a registration mode process, a measurement mode process, and a display process. Registration RAM 14 and display R
The AM 15 is a memory for storing various data, details of which will be described later. The key input unit 16 includes the switches shown in FIG. 1, and inputs an input signal corresponding to a switch operation to the control unit 1.
Output to 1. A detection signal from the gas sensor 10, that is, a change in electric resistance according to the alcohol concentration is represented by A
The control unit 11 receives the alcohol concentration from the digital data indicating the change in the electric resistance value, which is input to the control unit 11 via the / D conversion unit 17.

The decoder / driver 18 decodes the display decoder output from the control unit 11 and supplies a display drive signal to the display unit 3. The display unit 3 displays various data by the display drive of the decoder / driver 18. . The oscillation circuit 19 oscillates a clock signal of a predetermined frequency and inputs the clock signal to the frequency dividing / timing circuit 20. Frequency divider / timing circuit 20
Divides the clock signal input from the oscillation circuit 19, generates various timing signals such as a clock signal, and supplies it to the control unit 11.

FIG. 3 is a diagram showing a memory configuration provided in the registration RAM 14. In each of a plurality of continuous addresses, each storage area group for one cup, two cups,. Is provided. The storage area for each address constituting each storage area group is divided into a density data storage area and a timer value storage area. The alcohol concentration (ppm) in the breath, such as 10, 30, 50, etc., is stored in the concentration data storage area in the order of detection according to the address, and the timer value data storage area is stored at each measurement time point. Timer value data, which is the value of the timer 12, is stored.

FIG. 4 is a diagram showing a memory configuration provided in the display RAM 15. An interpolated value data storage area and a timer value data storage area are provided for each of a plurality of continuous addresses. The timer value data storage area stores sequentially changing timer values such as 0, 1, 2, 3, 4, 5, 6,... For each address, and the interpolation value data storage area stores each timer value. An interpolation value corresponding to the value is stored. Here, the interpolation value is a value that complements the value of each alcohol concentration registered between a certain time and the next time when displaying the alcohol concentration in a graph.

That is, as shown in FIG.
In the storage area for one cup of M14, density data 1 is stored in correspondence with t ₁ , t ₂ , t ₃ ,.
If 0, 30, 50,... Are stored, 0 to 30,
_{t 1, t 1 ~t 2,} t 2 ~t 3, unless interpolating density data in., can not be displayed graphically registered concentrations (one cup) as shown in FIG. 5 . For this reason, after the timer value data and the density data are stored in the registration RAM 14, for example, the timer value of t ₁ becomes 6
When was (min), the timer value 1 between 0 to t _1,
The interpolation values corresponding to 2, 3, 4, and 5 are calculated, and the interpolation values between the respective timer value data are stored in the display RAM 15.

In FIG. 5, AN represents the safe concentration (2
0 ppm), and the safe concentration AN is the display RAM 1
5 in a predetermined storage area. Also, the display RAM 15 is provided with a group of storage areas corresponding to the number-of-cups switch 9 of 1 cup, 2 cups,..., Similarly to the registration RAM 14.

Next, the operation of this embodiment according to the above configuration will be described. When the clock mode is set by operating the mode setting switch 6, the current time data is updated and displayed on the display unit 3 every time a clock signal is input from the frequency divider / timing circuit 20. You. In the clock mode, the key input unit 16
Waiting for key input at.

When the user operates the mode setting switch 6 after drinking, the mode is switched from the clock mode to the registration mode, and the registration mode is started according to the flowchart shown in FIG. That is, first, it is determined whether or not the registration start / end switch 4 has been operated (step A1). If the registration start / end switch 4 is operated, after the timer 12 is started (step A2), it is determined whether or not there is an alcohol concentration input based on the input value from the gas sensor 10 (step A2). A3). At this time, the user
If there is no alcohol concentration or the alcohol concentration is not higher than the set value (for example, 1 ppm or more) without blowing exhalation to 0, the standby state is maintained without proceeding to the next step, and during this time, the timer 12 The aging value is counted up.

Then, for example, after a lapse of t ₁ from the start of the timer 12, the user sends an exhalation to the gas sensor 1.
When it blows to 0, the alcohol concentration equal to or greater than the set value is input from the gas sensor 10 and the control unit 11
Based on the change in electrical resistance according to the alcohol concentration input via the, an alcohol concentration equal to or greater than a set value is detected (step A4). Continue to switch on the number of cups 9
It is determined whether or not any of these is in the ON state (step A5). When the user starts this registration mode, the user operates the number of cups switch 9 in advance to set the number of cups he or she drinks. If so, the process proceeds from step A5 to step A6, and the time interval between the timer start value or the previous timer value and the current timer value is calculated.

Subsequently, the current timer value data and the concentration data indicating the detected alcohol concentration are stored in an area of the registration RAM 14 corresponding to the cup number switch 9 (step A7). By the processing in step A7,
As shown in FIG. 3, the density data and the timer value data are stored in one of the areas for one cup, two cups,... And are stored in a pair relationship.

Next, after the address is incremented (step A9), the registration start / end switch 4
Is turned on again (step A).
9) Unless the registration start / end switch is turned on again, the loop of steps A3 to A9 is repeatedly executed. Therefore, by repeatedly executing the loop of steps A3 to A9, if the user blows out the gas on the gas sensor 10 at an arbitrary time, the timer value data and the concentration data at that time are converted to the values in step A8.
Are sequentially stored in the storage area of the address incremented by.

When the registration start / end switch 4 is pressed again, the interpolation value data corresponding to the elapsed time is calculated based on the timer value and the density data stored in the registration RAM 14, and the calculated complement is calculated. The value data and the density data are stored in the display RAM 15 in order of elapse of time (step A10). That is, as shown in FIG. 3, the timer value t ₁ of the density data "10" is stored in the registration RAM 14, the timer value t ₁ is to be had been "6", change the concentration per unit timer value , 10 /
6, which is about 1.67. The interpolated values corresponding to the elapsed times 1, 2, 3, 4, and 5 between 0 and t ₁ can be calculated by multiplying the change density by each elapsed time. Further, by truncating the calculated value below the decimal point, as shown in FIG. 4, the interpolation value 1 and the interpolation value 1 correspond to each timer value data (elapsed time).
3, 5, 6, and 8 can be obtained. Therefore, by executing the processing in step A10 described above, not only the interpolated value data but also the density data of t1 indicated by oblique lines are stored in the display RAM 15, and this display RAM ₁ is stored.
With the data stored in 5, the relationship between the elapsed time and the alcohol concentration can be graphically displayed as described later.

If the user drinks one of the registration modes described above after obtaining the electronic timepiece,
When two drinks are consumed, the density data is stored for each storage area group of the registration RAM 14 for one cup, two cups,.
Correspondingly, the interpolated value data in each case is stored in the display RAM 15 together with the density data.

After the density data and the interpolated value data are stored in advance as described above, when there is a chance to drink, when the drinking is started and the mode setting switch 6 is operated to set the measurement mode, According to the flowchart shown in FIG. 7, the measurement mode is started, and it is first determined whether or not the measurement switch 5 has been operated (step B).
1). When the measurement switch 5 is operated, after the timer 12 is started (step B2), it is determined whether or not there is an alcohol concentration input based on the input value from the gas sensor 10 (step B3). At this time, if the user does not breathe on the gas sensor 10 and there is no alcohol concentration, or if the concentration is very low even after blowing, the standby state is maintained without proceeding to the next step. The value is counting up.

When, for example, the user blows expiration on the gas sensor 10 at a point in time after an arbitrary timer has elapsed since the timer 12 was started (for example, at a point in time t _{3 in} FIG. 5), the gas sensor 10 The alcohol concentration is input, and the control unit 11 controls the B / D conversion unit 1
7, the alcohol concentration is detected based on a change in electric resistance corresponding to the alcohol concentration input through the controller 7 (step B).
4). Subsequently, it is determined whether or not any of the cup number switches 9 is in the ON state (step B5). When the user starts this measurement mode, it is determined in advance that
If the number of cups that the user has drunk has been set by operating the number of cups 9 of the user, the process proceeds from step B5 to step B6, where the detected concentration data and the number of cups corresponding to 9 are set in the operated number of cups switch. The numerical data and the current timer value are stored in a predetermined work area (step B).
6).

Subsequently, the timer value data in the display RAM 15 corresponding to the current timer value data is searched (step B7). That is, the display RAM 15 stores the timer values at all time points and the corresponding interpolated value data or density data, such as 0, 1, 2, 3,.... Therefore, in the measurement mode state, even if the user blows on the gas sensor 10 at any time from the start of the timer, the timer value data at this arbitrary time is present in the display RAM 15. Therefore, after the corresponding timer value data is searched in the display RAM 15 by the search processing in step B7, the searched interpolation value data or density data is read out from the display RAM 15 (step B8).

Further, the read-out interpolated value data or measured value data is compared with the detected current density data (step B9), and it is determined whether or not the compared values are the same or within the allowable range. (Step B10). For example, as shown by the broken line in FIG. 5, the drinking amount is one, the current timer value data is t ₃ , and the value of the currently detected concentration data is the value at the point P (40 ppm). , The value of the concentration data at point P (40 ppm)
Is determined to be the same as the density data value (48 ppm) corresponding to t ₃ of the registered density (for one cup) or within the allowable range. As a result of this determination, if the value (40 ppm) of the density data at the point P is not the same as the density data (48 ppm) corresponding to t ₃ or not within the allowable range, one alcoholic drink When the density data is registered, the current physical condition is remarkably different from that of the registered density data, and it is difficult to calculate a safe concentration prediction time described later with the registered density data. Therefore, in this case, “miss display” is displayed on the display unit 3 without calculating and displaying the safe concentration prediction time (step B13).

On the other hand, when the value of the density data at the point P is the same as the value of the density data corresponding to t ₃ or within the allowable range, the safe density predicted time until the safe density is reached is stored in the display RAM 15. Calculate from data (step B1
1). The calculation of the safety concentration prediction time, as shown in FIG. 5, by subtracting the current timer value data t ₃ from the timer value data t ₈ when registered concentrations (one cup) reaches the safe concentration AN it can be obtained by the value T _O. After calculating the safe concentration predicted time T _O , the current concentration and the safe concentration predicted time are displayed on the display unit 3 (step B12).

Thus, the user can not only know the current degree of sickness based on the current concentration, but also determine when the driving of the car becomes safe when driving after drinking, for example, based on the safe concentration prediction time. It is also possible to know. Moreover, since the safety concentration prediction time is calculated based on the concentration data of the user registered in advance,
An error due to individual differences in alcohol digestion ability does not occur, and an accurate safe concentration prediction time can be displayed.

When the current density and the estimated safe density time are displayed on the display unit 3 in step B12, as shown in FIG. 5, the currently detected density P and the estimated safe density time T _O are used. May be displayed as it is, or as shown in FIG.
The predicted time may be numerically displayed as shown in FIG. Also,
In this embodiment, the safety concentration prediction time is calculated and displayed. However, similarly to the case where the above-described safety concentration prediction time is calculated, the current timer is calculated from the timer value data of the registered maximum concentration. It is also possible to calculate the maximum density prediction time from the value obtained by subtracting the value data, and the maximum density prediction time may be calculated and displayed.

[0034]

As described above, according to the present invention, the alcohol concentration in the breath is detected, and the concentration data indicating the detected alcohol concentration and the time data indicating the detection time or the detection time are paired. To memorize it. Therefore, by detecting the alcohol concentration at a plurality of time points and storing it in the concentration storage means as concentration data,
It is possible to calculate a predicted time such as a safe concentration or a maximum concentration according to individual differences.

Further, the concentration data indicating the alcohol concentration detected in advance and the time data indicating the detection time or the detection time are stored in a paired relationship, and the alcohol concentration detected at an arbitrary detection time or the detection time is stored in the memory. The calculated alcohol concentration at the corresponding detection time or detection time is compared, and based on the comparison result, the maximum concentration prediction time and the safe concentration prediction time are calculated and displayed. Accordingly, an error due to individual differences in alcohol digestion ability does not occur in the calculated value, and an accurate maximum concentration prediction time and a safe concentration prediction time can be displayed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external configuration of an electronic wristwatch to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a circuit configuration of the electronic wristwatch.

FIG. 3 is a diagram showing a configuration of a memory provided in a registration RAM of the embodiment and an example of data stored in the memory.

FIG. 4 is a diagram showing a configuration of a memory provided in a display RAM of the embodiment and an example of data stored in the memory.

FIG. 5 is a diagram showing an example of a form displayed on a display unit in the embodiment.

FIG. 6 is a flowchart showing processing contents in a registration mode of the embodiment.

FIG. 7 is a flowchart showing processing contents in a measurement mode of the embodiment.

[Description of Signs] 3 Display unit 4 Registration start / end switch 5 Measurement switch 6 Mode setting switch 10 Gas sensor 11 Control unit 12 Timer 13 ROM 14 Registration RAM 15 Display RAM 16 Key input unit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 27/12 G01N 27/00

Claims (2)

(57) [Claims] An alcohol concentration detecting means for detecting the alcohol concentration in breath, concentration data indicating the alcohol concentration detected by the alcohol concentration detecting means, and time data indicating the detection time or detection time are paired. An alcohol concentration storage device, comprising: concentration storage means for storing in a relationship. 2. An alcohol concentration detecting means for detecting an alcohol concentration in the breath, a mode selecting means for selectively setting a concentration registration mode and a concentration detection mode, and wherein the concentration registration mode is set. Concentration storage means for storing concentration data indicating the alcohol concentration detected by the alcohol concentration detection means and time data indicating the detection time or the detection time in a paired relationship, with the concentration detection mode being set, Comparing means for comparing the alcohol concentration detected by the alcohol concentration detecting means at an arbitrary detection time or detection time with the alcohol concentration at the corresponding detection time or detection time stored in the concentration storage means; Calculating means for calculating a maximum concentration predicted time or a safe concentration predicted time based on the comparison result; Alcohol concentration estimated time display device characterized by comprising display means for displaying the calculation result by the.