CN212459706U

CN212459706U - Calibration circuit for absorbance sampling point of biochemical analyzer

Info

Publication number: CN212459706U
Application number: CN202020617866.8U
Authority: CN
Inventors: 赵嘉东; 孙生; 梁贵强
Original assignee: Changchun Bulaze Medical Technology Co ltd
Current assignee: Changchun Bulaze Medical Technology Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-02-02
Anticipated expiration: 2030-04-23

Abstract

The utility model relates to a calibration circuit for absorbance sampling points of a biochemical analyzer, a main control board is connected with an upper computer through a network port, the main control board is connected with an optical plate through a CAN bus, the main control board drives a reaction disc to rotate through a stepping motor, a groove-shaped optical coupler and a photoelectric converter transmit detected optical couplers and signals to the optical plate, the optical plate converts received light intensity signals into absorbance values and transmits the absorbance values to the main control board together with the optical coupler signals through the CAN bus, the main control board transmits the group of data to the upper computer through the network port, the upper computer obtains the offset sampling times of the optimal absorbance sampling points of each cup position relative to the falling edge of the optical coupler signals through mathematical calculation, and transmitting the obtained offset sampling times to a main control board through a network port, converting the offset times into the step number of the stepping motor by the main control board for storage, and determining the sampling point of the absorbance when the formal test is carried out. Compared with the traditional calibration method, the calibration circuit has the advantages that the absorbance sampling point is more accurately and stably selected.

Description

Calibration circuit for absorbance sampling point of biochemical analyzer

Technical Field

The utility model belongs to electronic equipment is a calibration circuit of medical treatment detects with electronic equipment's absorbance check point.

Background

At present, in the related testing process of a biochemical analyzer used in the medical field, the condition that the absorbance detection value on a reaction disc is unstable often occurs, and no corresponding device or method is provided for accurately detecting the absorbance value, so that the problem of deviation of the testing result caused by abnormal absorbance value in the testing and analyzing process of the biochemical analyzer is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a calibration circuit of biochemical analyzer absorbance check point can be fast accurate to the position of reaction cup absorbance sampling point and calibrate.

A biochemical analyzer absorbance sampling point's calibration circuit as follows:

as shown in fig. 1, the main control board is connected with the upper computer through a network port, the main control board is connected with the optical plate through a CAN bus, the main control board drives the reaction disc to rotate through a stepping motor, the slot type optical coupler and the photoelectric converter transmit detected optical coupler signals and light intensity signals to the optical plate, the optical plate converts the received light intensity signals into absorbance values and transmits the absorbance values and the optical coupler signals to the main control board through the CAN bus, the main control board transmits the data of the data to the upper computer through the network port, the upper computer obtains the offset sampling times of the optimal absorbance sampling point of each cup position relative to the optical coupler signal falling edge through mathematical calculation, and transmits the obtained offset sampling times to the main control board through the network port, the main control board converts the offset times into stepping motor step numbers to be stored, and the sampling points of the absorbance are.

The utility model has the advantages that:

biochemical analysis appearance absorbance sampling point's calibration circuit can be fast accurate the absorbance sampling point of reaction cup to avoided biochemical analysis appearance in the test analysis process, the problem of deviation appears in the test result because of the absorbance value causes unusually.

Drawings

FIG. 1 is a schematic diagram of a calibration circuit for absorbance detection points.

FIG. 2 is a schematic diagram of relative positions of the reaction cup, the code wheel, the stepping motor and the optical coupler.

Fig. 3 is a schematic diagram of relative positions of a falling edge of the calibrated optocoupler signal and an absorbance sampling point.

Description of reference numerals:

1. a main control board; 2. a reaction disc; 3. an upper computer; 4. an optical plate; 5. an optical coupler; 6. a photoelectric converter; 7. a stepping motor; 8. code disc; 9. a reaction cup.

Detailed Description

The first step is as follows: adjusting the installation positions of the groove-shaped optical coupler 5 and the photoelectric converter 6;

as shown in figure 2, the mechanical structure is adjusted, the sampling center of the groove-shaped optical coupler 5 is opposite to the falling edge position of the coded disc 8, the optical axis of the photoelectric converter 6 is opposite to the cup edge position of the reaction cup 9, and the purpose of doing so is to enable the reaction disc 2 to rotate about half cup position after the falling edge of the optical coupler is triggered after the sampling point is calibrated, and then the sampling point can be reached.

The second step is that: adding a sodium nitrite solution into the reaction cup 9;

300ul of a 0.5mol/L sodium nitrite solution was added to all the reaction cups 9 of the reaction tray 2.

The third step: collecting the absorbance value of the reaction cup 9;

as shown in fig. 1, the main control board 1 drives the stepping motor 7 to rotate the reaction disk 2 at a constant speed, so that all the reaction cups 9 sequentially pass through the photoelectric converter 6, and the obtained optical coupling signal and the light intensity signal are converted into combined data of absorbance and the optical coupling signal through the processing of the optical board 4.

The fourth step: transmitting the absorbance sampling value to an upper computer;

in the third step, the optical plate 4 transmits the converted combined data to the main control board 1 through the CAN bus every 5ms, and the main control board 1 transmits the combined data to the upper computer 3 through the network port.

The fifth step: calculating the position of a sampling point by upper computer software;

the absorbance data received by the upper computer 3 is a group of square wave data, and through mathematical operation, the offset sampling times of each optical coupler falling edge relative to the square wave midpoint position is calculated, that is, the optimal absorbance sampling point corresponding to each reaction cup 9 is the relative position deviation of the absorbance sampling point and the optical coupler signal falling edge after calibration as shown in fig. 3.

And a sixth step: processing and storing data;

and the upper computer 3 transmits the position offset sampling times of each calculated optocoupler falling edge relative to the middle point of the square wave to the main control board 1 through a network port, and finally the main control board 1 converts the position offset sampling times into an offset value of the running steps of the stepping motor 7 for storage, and the offset value is determined by a detection point of absorbance during formal testing.

Claims

1. The utility model provides a calibration circuit of biochemical analysis appearance absorbance sampling point which characterized in that: the main control board (1) is connected with the upper computer (3) through a network port, the main control board (1) is connected with the optical plate (4) through a CAN bus, the main control board (1) drives the reaction disc (2) to rotate through a stepping motor (7), the groove type optical coupler (5) and the photoelectric converter (6) transmit detected optical coupler signals and light intensity signals to the optical plate (4), the optical plate (4) converts the received light intensity signals into absorbance values and transmits the absorbance values and the optical coupler signals to the main control board (1) through the CAN bus, the main control board (1) transmits the group of data to the upper computer (3) through the network port, the upper computer (3) obtains the offset sampling times of the optimal absorbance sampling point of each cup position relative to the optical coupler signal falling edge through mathematical calculation and transmits the obtained offset sampling times to the main control board (1) through the network port, and the main control board (1) converts the offset times into the step number of the stepping motor (7), and (5) determining the sampling point of the absorbance when the test is to be carried out formally.