JPS61110034A - Measuring apparatus - Google Patents

Abstract

PURPOSE:To achieve a higher accuracy along with saving labor, by providing a light emitting element body and a light receiving element body on both sides of a body. CONSTITUTION:A measuring apparatus A is made up of a body section 1 made of transparent material such as quartz glass, a pipe-shaped passage 2 opened in the center of the body section 1 and a light emitting element body (a) and light receiving body (b) so arranged to face each other sandwiching the passage 2. A light with the wavelength converted into about 455nm, for instance, is supplied to the element body (a) of the apparatus A while an amplifier 10 is connected to the element body (b) and data amplified with the amplifier 10 is sent to a data processor (CPU). In this manner, when the wavelength is set at about 455nm, the absorption peak of serum is about 455nm whereas with respect to air (bubble), a greater absorbance is given because the measuring light will not focus scattering. Thus, it is possible to determine whether bubbles flow through a fluid passage B or not by comparing the photoelectric conversion voltage with a CPU corresponding to the absorbance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) This invention relates to various devices having a liquid flow path, for checking whether or not a liquid has flowed through the flow path, and for measuring the flow rate.
Or related to measuring instruments that use optical means to check for air bubbles, etc., especially for biochemical and immunological measurements.
This invention relates to a measuring instrument suitable for ULL.

(Technical Background of the Invention) As is well known, in various devices that handle liquids, such as automatic analyzers, it is necessary for accuracy control to measure the amount of liquid and check the state of inclusion of air bubbles, etc. Various devices have been developed for this purpose.

However, most of these conventional devices are integrated into the main body of the device, such as an automatic analyzer, and as a result, the devices become complicated and difficult to handle. This has the problem of high cost.

(Object of the Invention) This invention was devised in view of the current situation, and its purpose is to provide a small and easy-to-handle measuring instrument for measuring the amount of liquid, checking air bubbles, etc. This is what we are trying to provide.

(Structure of the Invention) In order to achieve the above object, in the present invention, a measuring instrument that is interposed in a liquid flow path and optically measures the flow rate of the liquid, the presence of bubbles, etc. is made of a transparent material. The main body is formed integrally with a flow path formed in the main body, and a light emitting element body and a light receiving element body are disposed opposite to each other on both sides of the main body part with the flow passage interposed therebetween. It is configured to check the amount of fluid and bubbles by processing the photoelectric conversion voltage difference of the liquid or bubbles passing through the flow path with a data processing device such as a computer.

(Embodiment of the Invention) The present invention will be described in detail below based on an embodiment shown in the accompanying drawings.

As shown in FIG. 1, the measuring instrument A according to this embodiment includes a main body part 1 made of a transparent material such as quartz glass, hard glass, or ceramic, and a main body part 1 formed in the center of the main body part l. It is composed of a pipe-shaped flow path 2, and a light emitting element body a and a light receiving element body arranged opposite to each other so as to sandwich the flow path 2, and these elements are attached to respective holders 3 and 4.

Of course, it is desirable that the holders 3 and 4 are not only made of a transparent material, but also made of a material, color, or other means that prevents light of wavelengths other than a predetermined wavelength from entering.

The light-emitting element body a and the light-receiving element body A are integrally connected to the main body part using appropriate mounting means, such as fitting means or fasteners, so that a plurality of light-emitting element bodies a and light-receiving element bodies are arranged on each optical axis. It is attached or is formed integrally with the main body part 1 in advance.

That is, if six light-emitting element bodies a and six light-receiving element bodies are placed opposite each other at predetermined intervals, the light-emitting element bodies a
As shown in Fig. 2, the measurement light of the required wavelength emitted from the main unit crosses the main body part and the flow path 2 to the corresponding light-receiving element bx, and the light-emitting element body a2 is transmitted to the corresponding light-receiving element body b2, and so on. a3 to b3, a4 to b4, a5 to b5, and a6
is arranged in the main body part 1 so that the light is received by b6.

In addition, connection ports 5 and 6 are protruded from the upper and lower ends of the flow path 2 formed in the main body portion I.
A liquid channel body connection end is connected to the liquid channel body.

An example of how the measuring instrument A configured as described above is used will be shown below.

FIG. 2 shows a case where this measuring instrument A is used as a measuring instrument for checking air bubbles in an automatic analyzer, and the measuring instrument A is placed in a liquid flow path B (for example, a serum suction flow path). is interposed.

For example, the light emitting element a of this measuring instrument A has a wavelength of 455 nm.
The wavelength light sensitivity converted back and forth is supplied, and an amplifier IO is connected to the light receiving element body, and this amplifier I
The data amplified by O is processed by a known data processing device (CPU
) will be sent to.

When the wavelength light beam is set to around 455 nm in this way, the absorption peak of serum is 455 nm, whereas in the case of air (bubbles), the measurement light is diffusely reflected and cannot be focused, so the absorbance is very low. Become.

Therefore, by comparing and processing the photoelectric conversion voltages corresponding to this absorbance using a data processing unit (CPU), it is possible to determine whether or not bubbles have flowed into the liquid flow path B.

FIG. 3 shows another embodiment of the present invention, in which the lower end of the flow path 2 of the measuring instrument A is closed with a stopper C, and the connection port end 5°6 is cut off. The main body part is formed into a rectangular shape and configured as a cell. In this case, each holder 3.4 and the main body 1 are provided with a measurement horizontal hole 7 through which the reaction measurement light passes, and other structures and functions are the same as in the previous embodiment, so the drawings are the same. The detailed explanation thereof will be omitted here.

When measuring instrument A is used as a cell in this way, the amount of liquid contained can be determined relative to the height of the light emitting element body a and the light receiving element body A.

(Effects of the Invention) Since the present invention includes the above-described configuration, it is possible to easily and accurately check the measurement of liquid and the state of air bubbles with a simple and small measuring instrument, and is particularly useful in the field of automatic analysis. It is possible to achieve extremely excellent effects in terms of labor saving and quality control.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view showing the configuration of the measuring instrument, Fig. 2 is an explanatory diagram showing an example of its use, and Fig. 3 is a sectional view showing the configuration of the measuring instrument. It is a sectional view showing a side composition. A...Measuring instrument B...Liquid flow path■...Main body 2...Flow path a...Light emitting element body
b... Light-receiving element weight... Measuring light patent applicant Nippon Tektron Co., Ltd.

Claims (1)

[Claims] A measuring instrument that is installed in a liquid flow path and optically measures the flow rate of the liquid, the presence of bubbles, etc., and the instrument includes a main body made of a transparent material and a main body formed on the main body. A measurement instrument comprising a flow path, and a light emitting element body and a light receiving element body which are integrally arranged on both sides of the main body part and are opposed to each other across the flow path.