JPS589048A - Calibrating method for reader of chemical color test paper - Google Patents

Abstract

PURPOSE:To permit checking of the presence or absence of any damage in a detecting head and the calibration of its sensitivity without using standard test pieces by calibrating the sensitivity by the use of the reflected light from a part of the surface of a test paper table of a reader for chemical color test paper. CONSTITUTION:The operator sets chemical color test paper 1 immersed in a test soln. on a test paper table 2 then pushes a switch for starting of reading. At this time, the part of the leading end 2a of the table 2 is under a detecting head 4 for reading. The head 4 reads the reflected light in this part and detects this as sensitivity characteristics. The table 2 is moved by a table driving screw 5 and when a position detecting block 3 detects the location of prescribed test paper pieces 11, 12, 13- to right under the head 4, their coloration is read, and the characteristics thereof are measured. True value characteristics are determined by integration of these characteristics. Thus the costs for addition and sticking of the test pieces are omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of calibrating the output of a read detection head of a color test paper reader prior to color reading by the color test paper reader.

The color test paper reading device referred to here is a device that detects the hue and degree of color development by the test liquid on the color test paper, and the color test paper can detect one color depending on the components and concentration of the test liquid. It is made by pasting several pieces of test paper with different degrees of strength onto a strip of composite material, and is used to measure the components and concentration of a test liquid. The reading detection head is a place for reading the above-mentioned color development, and is composed of a light source lamp, a spectroscope for the wavelength of the color to be detected, such as a filter, a light receiving element, and an electric circuit that makes them function. These components are damaged,
Before performing reading detection, it is impossible to avoid a decrease in passage rate due to dirt, drift, etc.
It is necessary to determine whether there is any loss of function due to damage and to understand the read sensitivity characteristics. That is, before the reading operation, the color reading detection head learns the reading sensitivity characteristics with respect to the reference reflected light.

Calibrate the reading of the test strip using that value as the reference value.

For this reason, in the past, a standard reflective strip was added to the color test paper (Japanese Patent Publication No. 56-12814), or a standard reflector was placed on the table on which the color test paper was set and fed under the color test detection head. Attach a reflective piece (1976)
0-86595) and other measures were taken.

The present invention checks whether the detection head is damaged or not and calibrates the sensitivity without using these standard reflective pieces, thereby eliminating the cost of adding or pasting the standard reflective pieces as described above. This will be explained with reference to the embodiment shown in FIG.

The figure is a partial side view of a test strip reading device (some models have a moving reading detection head) when the table 2 on which the colored test strip 1 is set is movable. Elements 11, 12, 18, . . . are positioned below the reading/sensing head 4, and 5 is a table drive screw. Color test paper 1 immersed in test liquid as shown in the figure
is set on the test paper table 2, and a switch (not shown) to start reading is pressed. At this time, the tip 2a of the test paper table 2 is under the reading detection head 4,
The head 4 reads the reflected light from this portion and grasps this as a sensitivity characteristic. Next, the test paper table is moved, a predetermined test paper piece is positioned directly below the reading detection head 4, color reading is performed, its characteristics are measured, and these characteristics are combined to obtain true value characteristics.

In this way, in the present invention, by utilizing the reflected light from a portion of the test strip table of the color test strip reader, the output of the reading detection head can be calibrated without the need for a standard reflective strip, etc., as in the past. It is something that grows.

[Brief explanation of drawings]

FIG. 1 is a partial side view of the test strip reading device of the present invention when the table on which the colored test strips are placed moves. 1, color test paper 2, table 8, position detection block 4, reading detection head 5, table drive screw 11, 12.18. Test paper strip applicant Mitsui Engineering & Shipbuilding Co., Ltd. Yanagimoto Seisakusho Co., Ltd. Agent Shigeo Kawata

Claims (1)

[Claims] A method of utilizing reflected light from a part of a surface of a test strip table of a color test strip reading device as an output calibration means for a color reading detection head of the device.