WO2022196346A1 - 自動分析装置 - Google Patents
自動分析装置 Download PDFInfo
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- WO2022196346A1 WO2022196346A1 PCT/JP2022/008632 JP2022008632W WO2022196346A1 WO 2022196346 A1 WO2022196346 A1 WO 2022196346A1 JP 2022008632 W JP2022008632 W JP 2022008632W WO 2022196346 A1 WO2022196346 A1 WO 2022196346A1
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- Prior art keywords
- current
- automatic analyzer
- amount
- light source
- analysis
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Classifications
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- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/00584—Control arrangements for automatic analysers
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- G01N35/02—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
- G01N35/025—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations having a carousel or turntable for reaction cells or cuvettes
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/251—Colorimeters; Construction thereof
- G01N21/253—Colorimeters; Construction thereof for batch operation, i.e. multisample apparatus
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- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
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Definitions
- the present invention relates to an automatic analyzer.
- the light source is one of the important parts that affect the analysis performance.
- the light emitted from the light source passes through a reaction solution in which reagents and specimens are mixed, is dispersed into a specific number of wavelengths by a spectroscope, and is detected by a detector.
- a halogen lamp has been used as a light source, but an automatic analyzer using an LED as a new light source has been proposed.
- Patent Document 1 discloses that a plurality of LED light sources with different wavelengths are periodically caused to emit light in order during measurement (analysis), and that a plurality of LED light sources are periodically emitted in order even during non-measurement such as in a standby state.
- this patent document 1 also discloses that an LED light source with a short wavelength does not emit light when not measuring because the time required for the light amount to stabilize is shorter than that of LED light sources with other wavelengths ( paragraph 0094, etc.).
- the object of the present invention is to provide an automatic analyzer that can stabilize the amount of light in a short time before measurement while extending the life of the light source.
- the present invention provides an automatic analyzer, a light source having two or more LED elements with different wavelengths, an analysis unit that performs analysis based on the light irradiated to the reaction vessel, and and a current adjustment unit that adjusts the amount of current supplied to each LED element, wherein the current adjustment unit individually reduces the amount of current for each LED element in the non-analysis state with respect to the amount of current in the analysis state. value.
- an automatic analyzer capable of stabilizing the amount of light in a short time before measurement while extending the life of the light source.
- FIG. 1 is an overall configuration diagram of an automatic analyzer according to an embodiment
- FIG. The figure which shows the module connection example of the automatic analyzer which concerns on embodiment.
- 5 is a graph showing the transition of the current value supplied to the light source after the start of analysis by the current adjustment unit according to the first embodiment
- 4 is a flow chart showing the processing from the start of the automatic analyzer according to the first embodiment to the transition to the rack reception mode
- 5 is a flow chart showing processing in a rack reception mode immediately after the end of analysis of the automatic analyzer according to the first embodiment
- 5 is a graph showing the transition of the current value supplied from the current adjustment unit to the light source from the power-off state of the automatic analyzer according to Example 1.
- FIG. 4 is a graph showing the transition of the amount of light from the power-off state of the automatic analyzer according to Example 1.
- FIG. 6 is a flow chart showing processing of light amount monitoring in the first embodiment.
- 9 is a graph showing changes in current value supplied to the light source by the current adjustment unit according to the second embodiment; 9 is a graph showing changes in current values supplied to LED elements A and B by a current adjusting unit according to Example 2;
- the configuration and operation of the automatic analyzer 100 according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
- the automatic analyzer 100 performs colorimetric analysis using biochemical reactions as described below.
- FIG. 1 is an overall configuration diagram of an automatic analyzer 100 according to an embodiment.
- the automatic analyzer 100 includes a transport line 101, a rotor 102, a reagent disk 103, a reaction disk 104, a dispensing mechanism 105, a stirring mechanism 106, a spectroscope 107, a reaction cell cleaning mechanism 108, a nozzle cleaning mechanism 109, a controller 115, an input It is composed of a unit 123, a display unit 124, and the like.
- the transport line 101 transports the sample rack 111 holding the sample container 110 containing the sample to the sample dispensing position 121 by the required amount.
- the dispensing mechanism 105 dispenses the sample from the sample container 110 to the reaction cell 112 (reaction container) at the sample dispensing position 121 .
- the conveying line 101 is further connected with the rotor 102 . By rotating the rotor 102 , sample racks 111 are exchanged with other transport lines 101 .
- the reagent disk 103 holds a reagent container 113 containing a reagent, and rotates and transfers the reagent container 113 to a position where the dispensing mechanism 105 can perform a dispensing operation.
- the dispensing mechanism 105 dispenses the reagent from the reagent container 113 to the reaction cell 112 at the reagent dispensing position 122 .
- the reagent is dispensed into the reaction cell 112 in an amount required for colorimetric analysis, and reacts with the component in the sample to be analyzed.
- the reaction disk 104 holds the reaction cell 112, and the reaction cell 112 which is the object of each operation up to the operation position indicating the position where the spectroscope 107 for colorimetric analysis, the stirring mechanism 106, the reaction cell cleaning mechanism 108, etc. operates respectively. is rotated. Note that the reaction cell 112 is kept warm by a constant temperature medium such as water. This promotes the chemical reaction between the components in the specimen and the reagent in the reaction liquid, which is a mixture of the specimen and the reagent.
- the dispensing mechanism 105 aspirates the sample to be colorimetrically analyzed from the sample container 110 and discharges it into the reaction cell 112 .
- the dispensing mechanism 105 aspirates a reagent corresponding to an object to be analyzed from the reagent container 113 and discharges it into the reaction cell 112 .
- the dispensing mechanism 105 includes an arm 118 , a nozzle 116 and a dispensing mechanism motor 119 .
- Arm 118 holds nozzle 116 and liquid level sensor 117 .
- Nozzle 116 is connected to liquid level sensor 117 .
- the liquid level sensor 117 detects the presence or absence of liquid based on changes in capacitance.
- a shield part 114 is installed in the vicinity of the position where the dispensing mechanism 105 performs the dispensing operation.
- the dispensing mechanism motor 119 moves the dispensing mechanism 105 vertically or in a rotational direction.
- Agitation mechanism 106 stirs the reaction in reaction cell 112 in order to promote the reaction between the component to be analyzed in the sample discharged from sample container 110 into reaction cell 112 and the reagent discharged from reagent container 113 into reaction cell 112 . Stir the liquid.
- the light source 120 irradiates the reaction liquid, which is stirred by the stirring mechanism 106 and chemically reacted, with output light.
- a spectrometer 107 spectroscopically separates the transmitted light that has passed through the reaction liquid. Based on the spectrally transmitted light, a colorimetric analysis by absorbance measurement is performed.
- the reaction cell cleaning mechanism 108 sucks the reaction liquid from the reaction cell 112 for which the colorimetric analysis has been completed, discharges detergent and the like, and cleans the reaction cell 112 .
- the nozzle cleaning mechanism 109 cleans the tip of the nozzle 116 of the dispensing mechanism 105 that has dispensed the sample or reagent. This removes the residue adhering to the nozzle 116 and does not affect the next analysis target.
- the control unit 115 is composed of a processor, memory, etc., and controls each mechanism, device, and the like.
- the input unit 123 is composed of a keyboard, mouse, touch panel, etc., and inputs instructions from the user to the control unit 115 .
- the display unit 124 is configured by an LCD (Liquid Crystal Display) or the like, and displays an operation screen or the like.
- FIG. 2 is a diagram showing an example of module connection of the automatic analyzer 100 according to the embodiment.
- the automatic analyzer 100 includes an input/storage unit 201 , an ISE unit 202 (electrolyte measurement unit), a sample transport unit 203 , and a colorimetric analysis unit 204 .
- the loading/storage unit 201 is used to load and store the sample rack 111 .
- the sample rack 111 loaded into the loading/storage unit 201 is moved to the sample transport unit 203 .
- the sample rack 111 is transported to the ISE section 202 via the rotor 102 (not shown in FIG. 2).
- ISE section 202 only measures items that do not use light source 120 .
- the sample rack 111 is returned to the sample transport section 203 via the rotor 102 .
- the sample rack 111 returned to the sample transport section 203 is transported to the sample dispensing position 121 of the colorimetric analysis section 204 .
- the dispensing mechanism 105 After the reaction cell 112 is washed and cell blank measurement is performed, the dispensing mechanism 105 performs a dispensing operation. The colorimetric analysis unit 204 then performs colorimetric analysis using the light source 120 . Details of the cell blank measurement will be described later with reference to FIG.
- FIG. 3 is a diagram showing an optical system used in the automatic analyzer 100 according to the embodiment and devices arranged therearound.
- the light source 120 is composed of two or more LED elements with different wavelengths.
- Automatic biochemical analysis has a plurality of measurement items, and the wavelengths of light used for each measurement item are different, and 12 wavelengths of light in the range of 340 to 800 nm are used for measurement.
- Conventionally used halogen lamps can output light of 12 wavelengths in one unit, but LED elements must use two or more LED elements capable of outputting light of different wavelengths. The current value supplied to each LED element is individually set.
- the light in the absorption region corresponding to the photometric target substance is absorbed by the photometric target substance.
- the light transmitted through the reaction liquid is incident on the concave diffraction grating 304 .
- the diffraction grating 304 splits the incident light into wavelengths and outputs the split light to the photodetector 305 .
- the photodetector 305 converts the amount of light into an electrical signal and outputs the electrical signal to the absorbance calculator 306 .
- the absorbance calculator 306 calculates the absorbance based on the electrical signal output from the photodetector 305 and outputs the calculated absorbance to the controller 115 .
- the controller 115 performs colorimetric analysis based on the absorbance output from the absorbance calculator 306 .
- cell blank water is dispensed to all reaction cells 112, and the absorbance of light at each wavelength of 340 to 800 nm is measured (cell blank measurement).
- the control unit 115 holds (stores) this measurement result as a cell blank value.
- the control unit 115 compares the cell blank value and the absorbance of the mixed liquid to be analyzed, corrects the absorbance, and outputs the corrected absorbance as measurement data to the user interface (screen displayed on the display unit 124, etc.).
- the current detection unit 307 monitors (measures) the current flowing through the light source 120 .
- the current adjustment unit 308 has a circuit that reduces the amount of current supplied to the light source 120 or turns off the power of the light source 120 at timing that does not affect analysis.
- the automatic analyzer 100 of the present embodiment adjusts the current supplied to the light source 120 by the current adjustment unit 308, and continues the control of supplying a low current and the pulse control without completely turning it off. It has a function to maintain an idle state so that it can immediately shift to the measured light amount of .
- Example 1 is an example in which the current adjusting unit 308 controls to supply a low current (a value that is reduced with respect to the amount of current in the analysis state) when the light source 120 is in an idle state.
- FIG. 4 is a graph showing changes in current values supplied to the light source 120 by the current adjusting unit 308 according to the first embodiment after the start of analysis.
- the automated analyzer 100 is in the measurement state (measurement mode) from time T0 to time T1, and transitions to the rack reception mode from time T1.
- the first standby mode is a sleep mode in which not only the dispensing mechanism 105 but also the cleaning mechanism and reaction disk 104 are stopped.
- the second standby mode is a rack reception mode in which the dispensing mechanism 105 is stopped but the washing mechanism and reaction disk 104 are not stopped. Therefore, in the rack reception mode, when receiving a measurement request from the user, the pre-analysis preparatory operation can be omitted and the measurement can be started.
- two LED elements are used as the light source 120 .
- the LED element A takes longer than the LED element B to stabilize at the light amount at the time of measurement when the current value at the time of measurement (first current value) is supplied from the power off state.
- the LED element A emits visible light and the LED element B emits ultraviolet light having a shorter wavelength than that of the LED element A. Therefore, when the automatic analyzer 100 transitions to the rack reception mode (second standby mode) at time T1, the measured current value I A1 of the LED element A changes to the idle state current value (fourth current value) I A2 is set smaller than the rate of decrease from the measured current value I B1 in the LED element B to the idle state current value (fourth current value) I B1 . As a result, two types of LED elements with different stabilization times can be stabilized at the same timing when transitioning to the measurement mode.
- the automatic analyzer 100 stops the analysis operation and transitions to sleep mode (first standby mode).
- the current values supplied to the respective LED elements are changed to idle current values (second current values) I A3 and I B3 used in the sleep mode.
- the values of I A3 and I B3 are set so that the rate of decrease from the measured current values I A1 and I B1 is greater than that of I A2 and I B2 .
- the sleep mode since the measurement operation of the automatic analyzer 100 is stopped as described above, it takes longer than the rack reception mode to transition from the execution instruction by the user to the measurement state. As a result, in the sleep mode, a longer time margin can be obtained until the light source 120 is stabilized than in the rack reception mode. load can be reduced. With such control, in the automatic analyzer 100 of the present embodiment, it is possible to extend the life of the light source 120 while stabilizing the amount of light in a short period of time before measurement.
- FIG. 5 is a flow chart showing the processing from the startup of the automatic analyzer 100 according to the first embodiment to the transition to the rack reception mode.
- the control unit 115 executes the initialization mode (step S500), and simultaneously activates the light source 120 (step S510). ).
- the initialization mode performs the minimum necessary initialization and preparation for measurement, and operations in the initialization mode include resetting of the dispensing mechanism 105, cell blank measurement, and the like.
- the control unit 115 causes the light source 120 to light up by causing the amount of current used during measurement to flow (supplying the current value during measurement). Even in the initialization mode in which no measurement is performed, the light source 120 is lit with the same level of current as in the measurement mode, so the LED elements are warmed and the light intensity can be stabilized during the initialization mode. At this time, it is monitored whether or not the amount of light has reached the amount at the time of measurement (step S511). Detailed processing of light amount monitoring will be described later. When the amount of light reaches the amount of light used for measurement, the initialization mode ends.
- the control unit 115 transitions to the sleep mode (step S501), and at the same time transitions the light source 120 to the idle state (step S512).
- the current adjustment unit 308 sets the amount of current for each LED element to a value obtained by individually decreasing the amount of current at the time of measurement (analysis state). Specifically, the current adjuster 308 makes the rate of decrease in the amount of current for the LED element B with the short wavelength greater than the rate of decrease in the amount of current for the LED element A with the long wavelength.
- the control unit 115 starts the pre-colorimetric analysis operation (step S502), and supplies a current exceeding the current value at the time of measurement to the light source 120 (step S513).
- the pre-analysis operation rack transportation, cell blank measurement, and the like are performed.
- the control unit 115 reduces the current amount to the current value at measurement (step S514), and again reduces the amount of light at the time of measurement. is reached (step S515).
- the control section 115 starts the analysis operation (measurement mode) (step S503).
- the colorimetric analysis unit 204 analyzes (measures) based on the light with which the reaction cell 112 is irradiated.
- the control section 115 determines whether or not the rack reception mode is set (step S520), and if it is set, causes the automatic analyzer 100 to transition to the rack reception mode.
- the time to shift from the analysis request to the analysis state in the mode is short, and the time margin to stabilize the light source 120 is short.
- the rate of decrease in the amount of current supplied to 120 is set smaller than in the normal idle state.
- FIG. 6 is a flow chart showing the processing in the rack reception mode immediately after the analysis of the automatic analyzer 100 according to the first embodiment. Note that the user can select enable/disable of the rack reception mode.
- the control unit 115 shifts the automatic analyzer 100 to the rack reception mode (step S600), and also shifts the light source 120 to the idle state (step S610).
- the control unit 115 causes the automatic analyzer 100 to start the pre-analysis operation (step S601), and supplies the current value at measurement to the light source 120 (step S611).
- the control unit 115 monitors whether or not the light from the light source 120 has reached the light intensity at the time of measurement (step S612).
- the control unit 115 shifts the light source 120 to the measurement state (step S613) and causes the automatic analyzer 100 to start the analysis operation (step S602).
- the control unit 115 causes the measurement mode to transition again to the rack representation mode (step S600).
- FIG. 7A is a graph showing the transition of the current value supplied from the current adjustment unit 308 to the light source 120 from the power OFF state of the automatic analyzer 100 according to the first embodiment.
- the vertical axis indicates current I supplied to light source 120
- the horizontal axis indicates time T.
- the solid line shows the transition when the light source is previously idled before the start of measurement as in this embodiment
- the dashed line shows the transition when the light source is turned off until the start of measurement as a comparative example. Show transition.
- time t0 be the time when the automatic analyzer 100 is powered on.
- the current adjustment unit 308 sets the amount of current supplied to the light source 120 to the measurement current value (first current value) i1.
- the current adjustment unit 308 reduces the current amount to the second current value i2 used in the idle state.
- the rate of decrease in the amount of current may be set differently for each LED element (eg, 50% decrease for LED element A and 30% decrease for LED element B).
- the period from time t ⁇ b>2 to time t ⁇ b>3 corresponds to the sleep mode, but the duration of the sleep mode varies depending on the usage conditions of the automatic analyzer 100 .
- the amount of current supplied to the light source 120 is maintained at the second current value i2 in the idle state.
- the current adjustment unit 308 sets the amount of current supplied to the light source 120 to a current value (third current value) i3 higher than the current value at the time of measurement. As a result, the temperature of the LED element rises, shortening the time until the amount of light stabilizes. Further, at time t4, the current adjustment unit 308 reduces the amount of current to the measurement current value i1, and maintains that value while the analysis operation is being performed. Then, at time t5, the analysis operation ends, the automatic analyzer 100 transitions to the rack reception mode, and the light source 120 transitions to the idle state.
- the current value (fourth current value) i4 that is higher than that in the normal idle state is set in order to enable the transition to the analysis state in a shorter time than in the normal standby mode (sleep mode). is supplied to the light source 120 .
- the automatic analyzer 100 After transitioning to the rack reception mode, when the next analysis request is made at a certain time (time t6 in FIG. 7A) within the time specified in advance by the user, the automatic analyzer 100 quickly transitions to the measurement mode. Accordingly, the current value supplied to the light source 120 is also changed to the measurement current value i1. On the other hand, after the transition to the rack reception mode, if the next analysis request is not made within the time specified in advance by the user, the automatic analyzer 100 transitions to the normal standby mode (sleep mode), and accordingly the current The value is also changed to the idle second current value i2.
- FIG. 7B is a graph showing the transition of the amount of light from the power off state of the automatic analyzer 100 according to Example 1.
- the vertical axis indicates the amount of light L from the light source 120 measured by the photodetector 305
- the horizontal axis indicates the time T.
- the solid line shows the transition when the light source is previously idled before the start of measurement as in this embodiment
- the dashed line shows the transition when the light source is turned off until the start of measurement as a comparative example. Show transition.
- the light intensity of the light source 120 gradually increases and eventually reaches l1, which is the light intensity at the time of measurement.
- l1 which is the light intensity at the time of measurement.
- the light amount also decreases to l2. This amount of light is maintained until the standby mode transitions to the measurement mode in response to an analysis request from the user.
- the third current value i3 larger than the current value at the time of measurement is supplied to the light source 120, and the light intensity rises to l3.
- the amount of light is stabilized by temporarily supplying a current amount exceeding the current value i1 at the time of measurement. After that, at time t4, the current value decreases to the measurement current value i1, the light intensity also changes to l1, and this light intensity is maintained during the analysis operation. If the rack reception mode is set at time t5 when the analysis operation ends, the supply current value decreases to the fourth current value i4 and the light intensity decreases to l4.
- FIG. 8 is a flow chart showing processing for light quantity monitoring in the first embodiment.
- control unit 115 of this embodiment has a function of controlling the current detection unit 307 and the absorbance calculation unit 306 to check whether the amount of light from the light source 120 is stable.
- the current detection unit 307 monitors the current by detecting the current value of the light source 120, and the absorbance calculation unit 306 calculates the absorbance based on the light transmitted through the reaction cell 112 to obtain the absorbance. monitor. Then, the control unit 115 uses the current value detected by the current detection unit 307 and the absorbance calculated by the absorbance calculation unit 306 to monitor whether there is an abnormality in the stabilization of the light amount.
- the current detection unit 307 monitors the current
- the absorbance calculation unit 306 monitors the absorbance of all wavelengths.
- the current value of the light source 120 detected by the current detector 307 and the absorbance calculated by the absorbance calculator 306 are sent to the controller 115 .
- the control unit 115 determines that the current monitoring value is within a certain range with respect to the setting value of the current adjustment unit 308 (for example, within ⁇ 1% of the setting current value), and the difference between the absorbance monitoring value and the previous value is It is determined whether or not it is within a certain range (step S801-1).
- the previous value to be compared with the monitored absorbance value the latest absorbance value calculated before the current value at the time of measurement is changed to another current value is used.
- the last cell blank value calculated before the power of the automatic analyzer 100 is turned off is used as the previous value. .
- step S801-1 when both the current monitoring value and the absorbance monitoring value satisfy the conditions, the control unit 115 determines whether the standard deviation of the absorbance at all wavelengths in the cell blank is within a certain range. (Step S802).
- step S802 when the standard deviation of the absorbance of all wavelengths in the cell blank is within a certain range, there is little variation in absorbance. and transition to sleep mode. Further, when the automatic analyzer 100 is in the pre-analysis operation, the control unit 115 ends the pre-analysis operation and starts the analysis operation.
- the control unit 115 determines whether or not a certain period of time has elapsed since the measurement current value was supplied (step S801-2). In the initialization mode, the time required for the amount of light to stabilize is longer than in the transition from the idle state to the measurement state. set longer than the
- step S801-1 If the condition of step S801-1 is not satisfied, the control unit 115 returns to step S800 to continue current monitoring and absorbance monitoring.
- step S801-1 if the condition of step S801-1 is satisfied, the control unit 115 indicates that there is an abnormality in the stabilization of the light source and displays a system alarm on the display unit 124 (step S801-3).
- the life of the light source 120 is calculated based on the total period when it is lit with the current value i1 at the time of measurement in FIG. 7A.
- the current value supplied to the light source 120 is not always the current value i1 at the time of measurement. desirable. Therefore, the control unit 115 of the present embodiment corrects the total lighting period in consideration of the period during which the light source 120 is supplied with the amount of current that is decreased from the measured state and the rate of decrease thereof. Therefore, the control unit 115 records the time during which the current is supplied to the light source 120 and the amount of current.
- the control unit 115 considers the reduction rate and corrects 50% of the actual lighting period. Record as lighting period. Then, the control unit 115 predicts the life of the light source 120 based on the recorded lighting period, and displays the light source replacement timing on the display unit 124, thereby providing the timing of providing the replacement service for the light source 120, which is difficult for the user. It is possible to comprehend.
- the second embodiment is an example in which the current adjustment unit 308 performs pulse control (alternately repeating the current value during measurement and the current value during OFF) when the light source 120 is in an idle state.
- FIG. 9A is a graph showing changes in current value supplied to the light source 120 by the current adjustment unit 308 according to the second embodiment. 9A, the vertical axis indicates the current I supplied to the light source 120, and the horizontal axis indicates the time T. In FIG.
- time t0 be the time when the automatic analyzer 100 is powered on.
- Light source 120 is in the OFF state from time t0 to time t1, and the current value supplied to light source 120 at this time is assumed to be OFF current value i0.
- the current adjustment unit 308 supplies the light source 120 with the current value i1 during measurement.
- the control unit 115 shifts the light source 120 to the idle state.
- the current adjustment unit 308 alternately switches the current value to be supplied to the light source 120 between the OFF time current value i0 and the measurement time current value i1 to perform pulse control.
- it takes five minutes or more to restore the light source 120 from the completely off state. Therefore, by not creating a complete OFF state by pulse control as in this embodiment, it is possible to shorten the recovery time.
- the life of the LED element depends on the temperature during operation, and the lower the temperature, the longer the life. Therefore, pulse control increases the OFF time of the light source 120 rather than continuously supplying the current value at the time of measurement.
- pulse control in which the duration of OFF is longer than the duration of ON reduces the temperature further, so that the life of the light source 120 is further extended. can.
- the pulse control period TI is set to a value that allows the light amount to stabilize before the analysis and that the life of the light source 120 can be extended as much as possible.
- the automatic analyzer 100 is in sleep mode, and the current adjustment unit 308 maintains pulse control.
- the automatic analyzer 100 transitions to measurement mode.
- the current adjustment unit 308 terminates the pulse control and supplies the current value i1 at measurement to the light source 120 .
- the automatic analyzer 100 is in the measurement mode, and the current adjustment unit 308 maintains the current value supplied to the light source 120 at the measurement current value i1.
- the control unit 115 transitions to the rack reception mode, and the current adjustment unit 308 starts pulse control at period TII .
- period T II is set to a value shorter than T I . It should be noted that instead of changing the pulse cycle between the rack reception mode and the sleep mode, the OFF duration of the pulse may be changed.
- the automatic analyzer 100 is in the rack reception mode, and the current adjustment section 308 maintains pulse control.
- the current adjustment unit 308 ends the pulse control and supplies the light source 120 with the measurement current value i1.
- the light source 120 is caused to emit light continuously without periodically emitting light during measurement. It can also be applied to an automatic analyzer with a short photometric time, such as a post-spectroscopic automatic analyzer.
- FIG. 9B is a graph showing changes in current values supplied to the LED elements A and B by the current adjusting unit 308 according to the second embodiment. 9B, the vertical axis indicates the current I supplied to the light source 120, and the horizontal axis indicates the time T. In FIG. 9B, the vertical axis indicates the current I supplied to the light source 120, and the horizontal axis indicates the time T.
- the light source 120 has two LED elements, and the LED element A takes longer than the LED element B to stabilize at the light amount at the time of measurement when the current value at the time of measurement is supplied from the power off state. and I A1 is the current value supplied to the LED element A by the current adjusting section 308, and I B1 is the current value supplied to the LED element B by the current adjusting section 308.
- the current regulator 308 pulse-controls the current supplied to each of the LED elements A and B.
- T A be the cycle of the pulse control performed on the LED element A
- T B be the cycle of the pulse control performed on the LED element B.
- FIG. As described above, LED element A has a longer stabilization time than LED element B.
- period T A is set to a value shorter than period T B .
- the function of monitoring the amount of light can prevent measurement due to an abnormal amount of light. Also, by monitoring the life of the light source under usage conditions, it is possible to provide an optimal replacement service.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- the above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not necessarily limited to those having all the described configurations.
- a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.
- Sample container 111 Sample rack 112 Reaction cell 113 Reagent container 114 Shield part 115 Control part 116 Nozzle 117 Liquid level sensor 118 Arm 119 Dispensing mechanism motor 120 Light source 121 Specimen dispensing position 122 Reagent dispensing position 123 Input unit 124 Display unit 201 Input/storage unit 202 ISE unit 203 Specimen transportation unit 204 Colorimetry Analysis unit 303 Reaction chamber 304 Diffraction grating 305 Photodetector 306 Absorbance calculation unit 307 Current detection unit 308 Current adjustment unit
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Abstract
Description
Claims (13)
- 波長の異なる2つ以上のLED素子を有する光源と、
反応容器に照射された光に基づいて分析を行う分析部と、
前記LED素子ごとに供給する電流量を調整する電流調整部と、を備え、
前記電流調整部は、非分析状態における前記LED素子ごとの電流量を、分析状態での電流量に対して個別に減少させた値とする自動分析装置。 - 請求項1に記載の自動分析装置において、
前記電流調整部は、波長の短い前記LED素子の電流量の減少割合を、波長の長い前記LED素子の電流量の減少割合よりも大きくすることを特徴とする自動分析装置。 - 請求項1に記載の自動分析装置において、
非分析状態のモードとして、第1スタンバイモードと、前記第1スタンバイモードより短い時間で分析状態に移行可能な第2スタンバイモードと、を有し、
前記電流調整部は、前記第2スタンバイモードにおける前記LED素子の電流量の減少割合を、前記第1スタンバイモードにおける前記LED素子の電流量の減少割合よりも小さくすることを特徴とする自動分析装置。 - 請求項3に記載の自動分析装置において、
前記反応容器の洗浄を行う洗浄機構と、前記反応容器を保持して所定の位置まで移動させる反応ディスクと、検体または試薬を分注する分注機構と、を備え、
前記第1スタンバイモードは、前記分注機構だけでなく、前記洗浄機構および前記反応ディスクも停止するモードであり、
前記第2スタンバイモードは、前記分注機構は停止するものの、前記洗浄機構および前記反応ディスクは停止しないモードであることを特徴とする自動分析装置。 - 請求項1に記載の自動分析装置において、
自動分析装置の電源がONになると、イニシャライズモードが実行された後、スタンバイモードを経て分析状態に至るものであって、
前記電流調整部は、前記イニシャライズモードにおける前記LED素子の電流量を、前記スタンバイモードにおける前記LED素子の電流量より大きくすることを特徴とする自動分析装置。 - 請求項5に記載の自動分析装置において、
前記電流調整部は、前記イニシャライズモードにおける前記LED素子の電流量を、分析状態での電流量とすることを特徴とする自動分析装置。 - 請求項5に記載の自動分析装置において、
前記電流調整部は、前記スタンバイモードから分析状態に至る途中で、前記LED素子の電流量を、一時的に、分析状態よりも大きな電流量とすることを特徴とする自動分析装置。 - 請求項1に記載の自動分析装置において、
前記光源の電流値を検出する電流検出部と、
前記反応容器を透過した光に基づいて吸光度を算出する吸光度算出部と、
前記電流検出部で検出された電流値と、前記吸光度算出部で算出された吸光度を用いて、光量の安定化に異常があるかを監視する制御部と、を備えたことを特徴とする自動分析装置。 - 請求項8に記載の自動分析装置において、
前記制御部は、分析状態での電流量を供給してから一定時間が経過しても、前記電流検出部で検出された電流値が前記電流調整部の設定値に対して一定範囲内でない場合、または、前記吸光度算出部で算出された吸光度の前回値との差分が一定範囲内でない場合、光量の安定化に異常があるとしてアラームを出力することを特徴とする自動分析装置。 - 請求項8に記載の自動分析装置において、
前記制御部は、分析状態での電流量を供給してから一定時間が経過しても、前記吸光度算出部で算出された吸光度の標準偏差が一定範囲内でない場合、光量の安定化に異常があるとしてアラームを出力することを特徴とする自動分析装置。 - 請求項1に記載の自動分析装置において、
分析状態よりも減少させた値の電流量を前記LED素子に供給した期間およびその減少割合を考慮して、前記光源の交換時期を予測する制御部と、
前記制御部で予測された前記光源の交換時期を表示する表示部と、を備えたことを特徴とする自動分析装置。 - 波長の異なる2つ以上のLED素子を有する光源と、
反応容器に照射された光に基づいて分析を行う分析部と、
前記LED素子ごとに供給する電流量を調整する電流調整部と、を備え、
前記電流調整部は、非分析状態には、パルスで電流を供給するものであって、波長の短い前記LED素子の場合、波長の長い前記LED素子の場合と比べて、OFFの継続時間を長くする自動分析装置。 - 請求項12に記載の自動分析装置において、
非分析状態のモードとして、第1スタンバイモードと、前記第1スタンバイモードより短い時間で分析状態に移行可能な第2スタンバイモードと、を有し、
前記電流調整部は、前記第2スタンバイモードにおけるパルスのOFFの継続時間を、前記第1スタンバイモードにおけるパルスのOFFの継続時間よりも短くすることを特徴とする自動分析装置。
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