JPS61254836A - Biochemical measurement instrument - Google Patents

Abstract

PURPOSE:To enable a measuring person to know the kind and content of errors by displaying the case in which a measured value exceeds the lower limit of a measuring range and the case in which the value exceeds the upper limit in different modes when the measured value exceeding the measuring range is obtd. thereby making possible the discrimination of both errors. CONSTITUTION:A light projecting and detecting part 11 is constituted of a light emitting element 12 and a photodetector 13. Light from the element 12 is projected to test paper 15 of a stick 14 and is reflected thereby. The reflected light is detected by the photodetector 13. The element 12 is driven by an LED driver 16 which is commanded by a CPU17. The photodetecting current flowing in the element 13 is taken into the CPU17 through a current/voltage converter 18 and an A/D converter 19. The CPU17 discriminates whether the measured value is on the side lower than the lower limit value of the measuring range or on the side higher than the upper limit value or within the measuring range. The result thereof is displayed on a display device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a biochemical measuring device such as a urine sugar measuring device or a blood glucose measuring device, and particularly to a biochemical measuring device having a feature of error display.

(b) Conventional technology For example, in a urine sugar measuring device, a test paper attached to the tip of a stick is impregnated with urine and colored, and the degree of coloration is read by a photoelectric device. A substance is being quantified. This measurement value is within a predetermined range, and if the measurement value is outside the range, it is an error, but with conventional urine sugar measurement devices,
Even if it went out of range, nothing in particular was displayed, or an error was simply displayed.

(C) Problems to be Solved by the Invention When the conventional urine sugar measuring device described above does not display anything even if the measured value exceeds a predetermined range, it is too late to realize that there is an error; Furthermore, there is a problem in that simply displaying an error makes it difficult to understand the content and type of the error.

In view of the above, when a measured value exceeds a predetermined range, that is, when an error occurs, it is possible to distinguish whether the measured value has deviated to the low value side or to the high value side, and to identify the content and type of the error. The purpose of the present invention is to provide a biochemical measurement device that allows easy understanding of the

(d) Means and action for solving the problem The biochemical measuring device of the present invention determines whether the measured value obtained from the photoelectric conversion means is lower than the lower limit of the measurement range or higher than the upper limit. It is characteristically equipped with an error determining means and an error indicator that displays the lower limit error and the upper limit error in different manners based on the output of the error determining means to distinguish between the lower limit error and the upper limit error.

In this biochemical measuring device, a lower limit error is displayed in the first display mode (see FIG. 2), and an upper limit error is displayed in the second display mode (see FIG. 1). Therefore, the measurer can judge which type of error has occurred by looking at the display mode.

(E) Examples The present invention will be explained in more detail with reference to Examples below.

FIG. 3 is a perspective view of a urine sugar measuring device in which the present invention is implemented. This urine sugar measuring device 1 has a display 3, a power key switch 4, and a measuring key switch 5 on the outer surface of a case 2. In addition, a stick holder 6 is provided at the tip of the case 2, and a button is provided. When 7 is pushed downward, the lid 8 is opened, and the stick is inserted into the stick insertion part 9 from above, and when the lid 8 is closed, the stick is held vertically. Further, inside the case 2, a light emitting/receiving section, an electronic circuit section, a battery, etc. are housed.

FIG. 4 is a circuit block diagram of the urine sugar measuring device 1.

The light emitting/receiving section 11 is composed of a light emitting element 12 and a light receiving element 13, and the light emitting/receiving section 11 includes a light emitting element 12 and a light receiving element 13.
Light from the light emitting element 12 is projected onto the test paper 15 of No. 4, is reflected, and is received by the light receiving element 13.

The light emitting element 12 is driven by the LED driver 16 according to a command from the CPU 17 . Further, the light-receiving current flowing through the light-receiving element 13 is converted into a voltage signal by a current/voltage converter 18, converted into a digital signal by an A/D converter 19, and then taken into the CPUI 7.

The CPU 17 has a function of reading a signal from the light receiving element 13 when the test paper 15 is not impregnated with urine, a function of reading a signal from the light receiving element 13 when the test paper 15 is impregnated with urine, and a function of reading a signal from the light receiving element 13 when the test paper 15 is impregnated with urine. The function also determines the ratio value and determines the urine sugar value from this ratio value, and determines whether this quantitative value, that is, the measured value, is on the lower side of the lower limit of the measurement range, on the higher side than the upper limit, or whether the measurement It has a function to determine whether it is within the range.

The measurement results obtained by the CPU 17 are displayed on the display 3. When the measured value is within the measurement range, the upper part 3a of the display 3 displays the semi-quantitative value (-1±, +, ++,...
etc.), and the representative values (0, 50, 100, . . . ) of the semi-quantitative range are displayed in the lower section 3b.

Next, for example, if the measured value exceeds the upper limit value, an error message "ErrH" is displayed on the lower part 3b of the display 3, as shown in FIG. Such an error may occur, for example, when the lid 8 of the stick holder 6 is removed.

Furthermore, for example, if the measured value is lower than the lower limit value, the second
As shown in the figure, an error message ErrL is displayed on the lower part 3b of the display 3. Such an error may occur, for example, when the stick is inserted only halfway into the stick holder 6.

In the above embodiment, the error display is shown as Err) (, ErrL) on the display 3, but it is simply EH.

It may also be displayed as EL characters. Alternatively, ErrHs ErrL may be engraved on the case surrounding the display 3, and the display 3 may display a symbol such as a ma that indicates ErrH when an upper limit error occurs, or indicates ErrL when a lower limit error occurs. You can do without it.

Although the above embodiments have been described using a urine sugar measuring device as an example, the present invention is not limited to this, and can be applied to blood sugar measuring devices, etc.
It can also be widely applied to other biochemical measurement devices.

(f) Effects of the Invention According to this invention, when a measured value is obtained beyond the measurement range, the case where the lower limit of the measurement range is exceeded and the case where the upper limit of the measurement range is exceeded are displayed in different B formats, so both errors can be displayed. The operator can easily understand the type and content of the error, and easily eliminate the cause.

[Brief explanation of drawings]

Fig. 1 shows an example of an error display on the upper limit side of the measurement range of a urine sugar measuring device according to an embodiment of the present invention, and Fig. 2 shows an example of an error display on the lower limit side of the measurement range of the urine sugar measuring device. FIG. 3 is an external perspective view of the urinary sugar measuring device, and FIG. 4 is a circuit block diagram of the urinary sugar measuring device. 1: Urine sugar measuring device, 3: Display, 12: Light-emitting element, 13: Light-receiving element, 14 Sticker, 15: Test paper, 17: CPU patent applicant Tateishi Electric Co., Ltd. agent
Patent Attorney Shigeru Nakamura Figure 1 Figure 3

Claims (1)

[Claims] (1) Light is projected onto a test strip containing the biochemical substance to be measured, the amount of light received through the test strip is converted into an electrical signal by a photoelectric conversion means, and a value corresponding to this electrical signal is displayed on a display. In the biochemical measuring device, the error determining means distinguishes and determines whether the measured value obtained by the photoelectric conversion means is lower than the lower limit of the measurement range or higher than the upper limit, and the error determining means detects the lower limit error or A biochemical measurement device comprising an error indicator that displays a lower limit error and an upper limit error in different manners by outputting the upper limit error.