CN106441502A - Device and method for noncontact measuring of remaining reagent amount - Google Patents

Abstract

The invention relates to a device and a method for noncontact measuring of remaining reagent amount and belongs to detection methods of remaining liquid amount. A liquid level electrode, a base electrode and a base reference electrode are identical in material, width L and thickness T, the base electrode and the base reference electrode are completely identical in shape and size, and a capacitance detection module is connected with the liquid level electrode, the base electrode and the base reference electrode respectively. Three detection electrodes: the liquid level electrode, the base electrode and the base reference electrode respectively measure a capacitance value CL between the liquid level electrode and reagent liquid, a capacitance value CR between the base electrode and the reagent liquid and a capacitance value CRB between the base reference electrode and the reagent liquid; liquid level can be acquired through calculating. The device is novel in structure and can measure liquid level without contact with the liquid.

Description

The apparatus and method of non-cpntact measurement reagent surplus

Technical field

The present invention relates to the detection method of residual liquid quantity, especially for amount of reagent in reagent barrel in Biochemical Analyzer Detection method.

Background technology

Whether Biochemical Analyzer need to use reagent when analysing body fluid, so needing clear and definite reagent surplus full before test The needs of foot test, this is accomplished by carrying out reagent surplus detection.The level detection technology of existing Medical Instruments is mainly floating Subtype level detection and probe-type detection mode.

Float-type level detection is to use a kind of relatively widely reagent surplus detection mode, but the inspection of float-type liquid level Survey can only export reagent with and without two states, it is impossible to the surplus of detection reagent, therefore be not suitable for the essence of reagent surplus Really detection.

Probe examination detection method is that probe declines from reagent bung, the electric capacity of detection probe, after probe contact liquid level Electric capacity increases, and the capacitance sudden change during being declined by detection probe and dropping distance calculate liquid level, and this method is surveyed Accuracy of measurement is higher；But this measuring method structure is complicated, needs space big；And measuring probe contacts with reagent, easily Reagent is polluted, thus affects the precision of reagent.

Content of the invention

The present invention provides the apparatus and method of a kind of non-cpntact measurement reagent surplus, with solve presently, there are can not essence The problems such as true detection, big, the easy cross pollution of method space requirement, the formula that can avoid contact with is measured the pollution causing reagent and again may be used To ensure the certainty of measurement of liquid level.

The present invention adopts the technical scheme that：The material of level electrode, reference electrode and reference electrode, width L and Thickness T is consistent, and reference electrode is identical with size with reference electrode shape, and capacitive detection module is electric with liquid level respectively Pole, reference electrode and reference electrode connect, level electrode, reference electrode, three electrode mounting means of reference electrode As follows：

Level electrode, is close to install outside reagent barrel bucket wall, highly can accommodate maximum reagent height with reagent barrel identical, produce The raw electric capacity producing to reagent liquid in bucket with the proportional relation of liquid level；

Reference electrode, is close to reagent barrel bucket wall lateral surface bottom and installs, produce electric capacity with reagent barrel lower liquid；

Reference electrode, is close to install at the no liquid of reagent barrel top, herein the maximum height higher than liquid level, produces electricity Electric capacity between pole and bucket wall；

Electric capacity is converted to the data signal being directly proportional to capacitance by capacitive detection module, processes data signal, And calculate liquid level.

A kind of method of non-cpntact measurement reagent surplus, comprises the following steps：

(1) three detecting electrodes are passed through：Level electrode, reference electrode, reference electrode is measured respectively by level electrode And capacitance C between reagent liquid_L, capacitance C between reference electrode and reagent liquid_R, reference electrode and reagent barrel produce Raw capacitance C_RB；

(2) by measuring level electrode capacitance C drawing_L, reference electrode capacitance C_R, reference electrode capacitance value C_RB, and the height of known three kinds of electrodes, can be calculated liquid level by the following method；

When in reagent barrel, liquid level is L, now capacitance C of reference electrode_YFor the threshold value of level gauging, when benchmark electricity The capacitance of pole is less than C_YWhen, now capacitive detection module Water free alarming；

When the capacitance of reference electrode is more than or equal to C_YWhen, the height H of liquid level₃Calculated by below equation：

H₃：Tested liquid level；

H₁：Reference electrode height；

N：H₂/H₁, wherein H₂For level electrode height；

C_L：Level electrode capacitance；

C_R：Reference electrode capacitance；

C_RB：Reference electrode capacitance value.

It is an advantage of the invention that novel structure, contact liq i.e. not can accurately measure liquid level.

Brief description

Fig. 1 is the structural representation of the present invention.

Fig. 2 is the side structure schematic diagram of the present invention.

Detailed description of the invention

Level electrode the 1st, reference electrode 2 is consistent with thickness T with the material of reference electrode 3, width L, reference electrode 2 He Reference electrode 3 shapes and sizes are identical, capacitive detection module 4 respectively with level electrode the 1st, reference electrode 2 and benchmark Reference electrode 3 connects, and level electrode the 1st, reference electrode the 2nd, 3 three electrode mounting means of reference electrode are as follows：

Level electrode 1, is close to install outside 5 barrels of walls of reagent barrel, highly can accommodate maximum reagent height with reagent barrel identical, Produce and produce the electric capacity with the proportional relation of liquid level to reagent liquid in bucket；

Reference electrode 2, is close to 5 barrels of wall lateral surface bottoms of reagent barrel and installs, produce electric capacity with reagent barrel lower liquid；

Reference electrode 3, is close to install at the no liquid of reagent barrel 5 top, herein the maximum height higher than liquid level, produces Electric capacity between electrode and bucket wall；

Electric capacity is converted to the data signal being directly proportional to capacitance by capacitive detection module 4, processes data signal, And calculate liquid level.

A kind of method of non-cpntact measurement reagent surplus, comprises the following steps：

(1) three detecting electrodes are passed through：Level electrode 1, reference electrode 2, reference electrode 3 is measured respectively by liquid level Capacitance C between electrode and reagent liquid_L, capacitance C between reference electrode and reagent liquid_R, reference electrode and reagent Capacitance C that bucket produces_RB；

(2) by measuring level electrode capacitance C drawing_L, reference electrode capacitance C_R, reference electrode capacitance value C_RB, and the height of known three kinds of electrodes, can be calculated liquid level by the following method；

When in reagent barrel, liquid level is L, now capacitance C of reference electrode 2_YFor the threshold value of level gauging, work as benchmark The capacitance of electrode 2 is less than C_YWhen, now capacitive detection module Water free alarming；

When the capacitance of reference electrode 2 is more than or equal to C_YWhen, the height H of liquid level₃Calculated by below equation：

H₃：Tested liquid level；

H₁：Reference electrode height；

N：H₂/H₁, wherein H₂For level electrode height；

C_L：Level electrode capacitance；

C_R：Reference electrode capacitance；

C_RB：Reference electrode capacitance value.

Claims (2)

1. the device of a non-cpntact measurement reagent surplus, it is characterised in that：Level electrode, reference electrode and reference electricity The material of pole, width L are consistent with thickness T, and reference electrode is identical with size with reference electrode shape, capacitance detecting mould Block is connected with level electrode, reference electrode and reference electrode respectively, level electrode, reference electrode, reference electrode three Individual electrode mounting means is as follows：

Level electrode, is close to install outside reagent barrel bucket wall, and it is identical that height and reagent barrel can accommodate maximum reagent height, produce with Reagent liquid in bucket produces the electric capacity of relation proportional to liquid level；

Reference electrode, is close to reagent barrel bucket wall lateral surface bottom and installs, produce electric capacity with reagent barrel lower liquid；

Reference electrode, is close to install at the no liquid of reagent barrel top, herein higher than the maximum height of liquid level, produce electrode with Electric capacity between bucket wall；

Electric capacity is converted to the data signal being directly proportional to capacitance by capacitive detection module, processes data signal, and counts Calculate liquid level.

2. use the non-cpntact measurement reagent surplus of the device of non-cpntact measurement reagent surplus as claimed in claim 1 Method, comprises the following steps：

(1) three detecting electrodes are passed through：Level electrode, reference electrode, reference electrode is measured respectively by level electrode and examination Capacitance C between agent liquid_L, capacitance C between reference electrode and reagent liquid_R, reference electrode and reagent barrel produce Capacitance C_RB；

(2) by measuring level electrode capacitance C drawing_L, reference electrode capacitance C_R, reference electrode capacitance value C_RB, And the height of known three kinds of electrodes, can be calculated liquid level by the following method；

When in reagent barrel, liquid level is L, now capacitance C of reference electrode_YFor the threshold value of level gauging, when reference electrode Capacitance is less than C_YWhen, now capacitive detection module Water free alarming；

When the capacitance of reference electrode is more than or equal to C_YWhen, the height H of liquid level₃Calculated by below equation：

$H_3=H_1\frac{C_L-N*C_{RB}}{C_R-C_{RB}}$

H₃：Tested liquid level；

H₁：Reference electrode height；

N：H₂/H₁, wherein H₂For level electrode height；

C_L：Level electrode capacitance；

C_R：Reference electrode capacitance；

C_RB：Reference electrode capacitance value.