WO2023074358A1 - 自動分析装置及びその異常判定方法 - Google Patents
自動分析装置及びその異常判定方法 Download PDFInfo
- Publication number
- WO2023074358A1 WO2023074358A1 PCT/JP2022/037922 JP2022037922W WO2023074358A1 WO 2023074358 A1 WO2023074358 A1 WO 2023074358A1 JP 2022037922 W JP2022037922 W JP 2022037922W WO 2023074358 A1 WO2023074358 A1 WO 2023074358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stirring
- unit
- automatic analyzer
- constant temperature
- impedance
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000005856 abnormality Effects 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 70
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 40
- 238000002847 impedance measurement Methods 0.000 claims description 27
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 230000007246 mechanism Effects 0.000 description 8
- 238000012886 linear function Methods 0.000 description 6
- 239000012295 chemical reaction liquid Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009795 derivation Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 238000011481 absorbance measurement Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- -1 specimen Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N35/02—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
Definitions
- the present invention relates to an automatic analyzer and its abnormality determination method.
- Patent Literature 1 discloses an automatic analyzer in which a plurality of electrodes that generate ultrasonic waves are arranged and the position of the liquid surface is detected from the difference in impedance measured by each electrode.
- Patent Document 2 discloses an automatic analyzer that detects the presence or absence of a reaction liquid by measuring the impedance of a piezoelectric element in a stirring section.
- An object of the present invention is to provide a highly reliable automatic analyzer and its abnormality determination method.
- the automatic analyzer of the present invention comprises a stirring section for stirring a specimen and a reagent by irradiating a reaction container with ultrasonic waves, and a power amplifier for applying a voltage to a piezoelectric element of the stirring section.
- an impedance measuring unit that measures the electrical impedance of the piezoelectric element of the stirring unit; an analysis unit that analyzes components of a reaction liquid of the sample and the reagent; the stirring unit, the power amplifier, the impedance measuring unit, and the analysis and a control unit for controlling a unit, comprising a plurality of the stirring units, wherein the control unit measures the electrical impedance of the plurality of stirring units by the impedance measurement unit, A connection state between the stirring section and the power amplifier or the impedance measuring section, or a tilt state of the automatic analyzer is determined.
- the abnormality determination method of the present invention includes: a stirring unit for stirring a sample and a reagent by irradiating a reaction container with ultrasonic waves; a power amplifier for applying a voltage to a piezoelectric element of the stirring unit;
- An abnormality determination method for an automatic analyzer comprising: an impedance measurement unit that measures the electrical impedance of an element; and an analysis unit that analyzes components of a reaction solution of the specimen and the reagent, Based on the electrical impedances measured by the impedance measuring section for at least two stirring sections, the connection state between the stirring section and the power amplifier or the impedance measuring section, or the tilt state of the automatic analyzer is determined.
- FIG. 1 is a schematic configuration diagram of an automatic analyzer according to this embodiment
- FIG. FIG. 4 is a diagram showing the configuration of a stirring section, a power amplifier connected thereto, and an impedance measuring section
- FIG. 4 is a diagram showing details of the configuration of an impedance measurement circuit
- FIG. 4 is a diagram showing the influence of standing waves between the reaction container and the piezoelectric element
- 5 is a graph showing frequency characteristics of electrical impedance when liquid is present at the position of the split electrode and when liquid is not present.
- FIG. 4 is a schematic diagram showing a case where the stirring section is normally connected to the relay board;
- FIG. 4 is a schematic diagram showing a case where the stirring section is not normally connected to the relay board;
- Part of the flowchart (first half) showing a method of determining whether the connector is correctly inserted into the stirring unit.
- the remaining portion (second half) of the flow chart showing how to determine if the connector is correctly inserted into the stirrer.
- Graph showing the liquid level height of constant temperature water in each stirring section.
- FIG. 1 is a schematic configuration diagram of an automatic analyzer according to this embodiment.
- the automatic analyzer includes a sample storage unit 101, a reagent storage unit 102, a reaction unit 103, stirring units 104 to 109, an analysis unit 110, a washing unit 111, and a sample dispensing mechanism. 113 and a reagent dispensing mechanism 115 .
- the automatic analyzer further includes a control unit (host computer) composed of an electronic circuit and a storage device, and the control unit controls the operation of each unit and each mechanism. be done.
- a control unit host computer
- a sample container such as a test tube is stored in the sample storage unit 101, and a sample 112 is placed in the sample container.
- the reaction section 103 is composed of a rotatable reaction disk, and reaction containers 114 (reaction cells) are arranged circumferentially on the reaction disk.
- the reaction disk has a constant temperature bath that holds constant temperature water at a specified temperature, and the constant temperature water circulating in the constant temperature bath comes into contact with the reaction vessel 114, so that the reaction vessel 114 reaches a predetermined temperature. kept.
- the specimen dispensing mechanism 113 aspirates the specimen 112 in the amount required for analysis from the specimen container, and discharges the aspirated specimen 112 into the reaction container 114 on the reaction section 103 .
- the reagent dispensing mechanism 115 aspirates a required amount of reagent 116 for analysis from the reagent storage unit 102 and discharges the aspirated reagent 116 into the reaction container 114 .
- a plurality of stirring sections 104 to 109 are arranged side by side on the outer peripheral side of the reaction disk, and stir the sample 112 and the reagent 116 discharged into the reaction container 114, respectively.
- the analysis unit 110 analyzes the components of the reaction liquid of the specimen 112 and the reagent 116 in which the reaction has been accelerated by measuring the absorbance.
- the cleaning unit 111 cleans the reaction container 114 for which the absorbance measurement has been completed.
- the next specimen 112 is dispensed by the specimen dispensing mechanism 113 into the reaction container 114 washed by the washing section 111, and the same sequence is repeated thereafter.
- the stirring units 104 to 109 irradiate the reaction container 114 with ultrasonic waves, and use vibration, acoustic flow, acoustic radiation pressure, and the like to achieve non-contact stirring of the specimen 112 and the reagent 116 .
- the sample 112 and the reagent 116 are efficiently stirred, and high processing capacity is realized.
- constant-temperature water is used as the liquid that mediates sound waves, but water other than constant-temperature water may be used, and liquids other than water may be used.
- sound waves other than ultrasonic waves may be used.
- FIG. 2 is a diagram showing the configuration of a stirring section, a power amplifier connected thereto, and an impedance measuring section.
- the stirrer 104 shows a vertical cross section along the radial direction of the sample storage unit 101, and the electrical circuit arranged on the host computer side with respect to the connector 201 has a schematic configuration. showing.
- the stirring unit 104 will be described below as an example, the same applies to the stirring units 105 to 109 as well.
- the stirring unit 104 includes a piezoelectric element 202 that generates ultrasonic waves, a jig 203 for attaching the piezoelectric element 202 to the thermostat 117, and reacts the ultrasonic waves transmitted through the reaction vessel 114 and the like.
- a reflector 223 for reflecting light toward the container 114 and a connector 201 for electrically connecting the piezoelectric element 202 and the host computer are provided.
- the piezoelectric element 202 includes split electrodes 204 and 209 provided on one side (air side) and in contact with the air, and a constant temperature water side provided on the other side (constant temperature water side) and in contact with the constant temperature water 208 . and an electrode 205 .
- a part of the constant temperature water side electrode 205 is folded back along the lower end surface of the piezoelectric element 202 toward the air side surface.
- the split electrodes 204 and 209 are split as a plurality of electrodes at different height positions. In this embodiment, an example in which 13 split electrodes are provided (only some of them are shown in FIG. 2 and the like) will be described, but the number of split electrodes is not limited to 13. The dimensions and shape of each split electrode can be individually designed arbitrarily. Only the th (bottom) split electrode 209 is formed slightly longer than the other split electrodes 204 . Each split electrode is connected to each pin of the connector 201 in a one-to-one manner.
- the power amplifier 206 drives the piezoelectric element 202 by applying voltage to the split electrodes to generate ultrasonic waves.
- the power amplifier 206 specifically includes a function generation circuit 210 that generates a drive waveform, a final amplifier circuit 211 that amplifies the waveform to desired power, and a piezoelectric element 211 that amplifies the waveform to desired power. and a current monitor 212 that measures the current flowing through 202 .
- the current monitor 212 can be configured using, for example, electromagnetic coupling.
- the impedance measurement circuit 207 measures the frequency characteristic of the electrical impedance of the piezoelectric element 202 (hereinafter sometimes abbreviated as “ImpS”).
- the ImpS of the piezoelectric element 202 is represented, for example, by a set of ImpS applied to each split electrode (that is, ImpS between each split electrode 204, 209 and the constant temperature water electrode 205).
- the power amplifier 206 is provided with a first interface section 221 that connects with the host computer, and the host computer controls the power amplifier 206 via this first interface section 221 .
- the impedance measurement circuit 207 is provided with a second interface section 222 that connects with the host computer, and the host computer controls the impedance measurement circuit 207 via this second interface section 222 . Also, the impedance measurement circuit 207 transmits the ImpS measurement result to the host computer via the second interface section 222 .
- the power amplifier 206 and the impedance measurement circuit 207 are connected to the stirring section 104 via the connector 201. Furthermore, a relay group 213 is arranged between the power amplifier 206 and the impedance measurement circuit 207 and the connector 201 .
- the relay group 213 has a plurality of switches, and opening and closing of each switch is controlled by commands from the host computer. That is, the relay group 213 functions as a switching device that switches connections between the power amplifier 206 and the impedance measurement circuit 207 and the split electrodes 204 and 209 .
- the host computer detects the liquid level position (liquid level height) in the reaction vessel 114 (a specific example of the detection method will be described later). Furthermore, the host computer selects one or more split electrodes 204 and 209 at appropriate positions according to the liquid surface position, and controls the relay group 213 to apply voltage to the selected split electrodes 204 and 209 . In this manner, the ultrasonic irradiation position to the reaction vessel 114 is adjusted.
- a first switching circuit for switching whether the piezoelectric element 202 is connected to the power amplifier 206 or the piezoelectric element 202 is connected to the impedance measurement circuit 207.
- a changeover switch 215 is installed.
- a second switch 214 is installed between the impedance measuring circuit 207 and the connector 201 to switch between connecting the impedance measuring circuit 207 to the piezoelectric element 202 and connecting the impedance measuring circuit 207 to the ground.
- the first changeover switch 215 is connected to the terminal 216 of the power amplifier 206, and the second changeover switch 214 is connected to the terminal 219 (finally connected to the ground 220).
- the first changeover switch 215 is connected to the output terminal 217 of the impedance measurement circuit 207 and the second changeover switch 214 is connected to the input terminal 218 of the impedance measurement circuit 207 .
- the host computer of this embodiment applies voltages to the divided electrodes 204 and 209 via the power amplifier 206 and measures ImpS of the piezoelectric element 202 via the impedance measurement circuit 207 .
- the impedance measurement circuit 207 does not need to be configured independently from the host computer as shown in FIG. 2, and may be configured by a single electronic circuit in which the impedance measurement circuit 207 and the host computer are integrated.
- FIG. 3 is a diagram showing the details of the configuration of the impedance measurement circuit 207.
- a direct digital synthesizer Direct A Digital Synthesizer (hereinafter abbreviated as “DDS”) 301 generates a sinusoidal waveform voltage with an arbitrary frequency.
- a sinusoidal voltage generated by the DDS 301 is amplified by the amplifier 302 and output from the output terminal 217 .
- the output terminal 217 is connected to the split electrode 204 via the first selector switch 215 and the relay group 213 , and the split electrode 204 applies a sinusoidal waveform voltage to the piezoelectric element 202 .
- DDS Direct A Digital Synthesizer
- the magnitude of the applied voltage can be appropriately designed according to the characteristics of the piezoelectric element 202, etc.
- the voltage is smaller than that during the stirring operation (for example, a voltage called a weak voltage).
- the piezoelectric element 202 can be prevented from being damaged.
- a current that flows through the piezoelectric element 202 when a voltage is applied flows into the input terminal 218 via the constant temperature water electrode 205 and the relay group 213 and is detected as a voltage value by the detection resistor 305 .
- the voltage signal detected by the detection resistor 305 is further amplified by a logarithmic amplifier 307 (LogAmp) via an operational amplifier 306 that is linearly amplified with an appropriate gain.
- a voltage applied to the piezoelectric element 202 from the output terminal 217 is input to a micro control unit (hereinafter abbreviated as “MCU”) 310 via wiring 308 .
- MCU micro control unit
- a voltage amplified by the logarithmic amplifier 307 is also input to the MCU 310 via the wiring 309 .
- the resolution of the A/D converter built in the MCU 310 is about 8 to 10 bits, so the logarithmic amplifier 307 is used. If MCU 310 with a converter is employed, linear amplifiers may be used instead of logarithmic amplifiers.
- the voltage signal input to the MCU 310 is A/D converted.
- the MCU 310 sends a control signal 311 to the DDS 301 to sweep the frequency of the generated sine wave over a desired frequency range.
- the frequency at this time, the applied voltage from the output terminal 217, and the measured voltage corresponding to the current flowing through the piezoelectric element 202 are stored in the memory within the MCU 310 and sent to the host computer via the second interface section 222 for ImpS measurement. sent as a result.
- FIG. 4A shows an example of the results of measuring ImpS of the piezoelectric element 202 in air
- FIG. 4B shows an example of the results of measuring ImpS with one side of the same piezoelectric element 202 in contact with constant temperature water.
- the horizontal axis represents the drive frequency
- the vertical axis represents the absolute value
- the phase difference at resonant frequency 403 is approximately zero, which means the point at which piezoelectric element 202 changes from capacitive to inductive.
- the piezoelectric element 202 vibrates more than when it is driven at other frequencies, and it is considered that the piezoelectric element 202 is in a resonance state in the thickness direction.
- the resonance frequency 406 is almost the same as the resonance frequency 403.
- of the electrical impedance at the resonance frequency in FIG. 4B that is, the minimum value 405 of the absolute value
- the specific acoustic impedance of water is 3000 times or more that of air, and the higher the acoustic impedance, the higher the acoustic load, so the electrical impedance rises accordingly. That is, in the case of FIG. 4B, it is considered that the vibration of the surface of the piezoelectric element 202 on the side in contact with the constant temperature water propagates to the constant temperature water, and the ultrasonic wave is emitted from the surface of the piezoelectric element 202. .
- FIG. 5 shows the effect of standing waves between the reaction container 114 and the piezoelectric element 202.
- An ultrasonic wave generated by applying a voltage to the piezoelectric element 202 propagates through the constant temperature water 208 and propagates as a traveling wave 501 to the reaction vessel 114 .
- the ultrasonic waves reaching the reaction container 114 are almost totally reflected by the inner surface 502 of the reaction container 114 when no liquid is present in the reaction container 114, and a reflected wave 503 is generated. That is, between the inner surface 502 of the reaction container 114 and the piezoelectric element 202, the traveling wave 501 and the reflected wave 503 are combined to generate the standing wave 504.
- Ultrasonic waves have the property that they do not reflect inside a uniform substance, in other words, they reflect at material boundaries between different substances. Therefore, ultrasonic waves are almost totally reflected at material boundaries such as water and air that have greatly different acoustic impedances.
- the ultrasonic waves reach the reaction vessel 114 via constant temperature water, which is liquid, so the magnitude of the standing wave 504 varies greatly depending on whether or not liquid exists in the reaction vessel 114 .
- the effect of standing waves is reduced because the difference in acoustic impedance at material boundaries is small.
- the difference in acoustic impedance at the material boundary increases, so the influence of the standing wave increases.
- the ID numbers of the split electrodes 204 and 209 of the piezoelectric element 202 are set to 1, 2, .
- FIG. 6 shows the frequency characteristics of electrical impedance with and without liquid present at the position of the split electrodes.
- the horizontal axis is the frequency
- the vertical axis is the absolute value of the electrical impedance.
- the frequency characteristic Z(f) of the electrical impedance of a specific segmented electrode (eg, ID number 1) is measured.
- the range of frequencies to be swept should be larger than the range of f1 and f2 used in the above (Equation 1).
- the waveform is smoothed in the control section, and there are various smoothing methods such as a moving average method.
- the frequency characteristic of the electrical impedance to which the smoothing filter is applied is Zflt(f), and the difference between Z(f) and Zflt(f) is quantified by performing definite integration as shown in (Equation 1). . That is, the difference between the frequency characteristics of the electrical impedance before and after the smoothing filter processing in the split electrodes is quantified, and the influence of the standing wave at the position of each split electrode is quantified by this difference.
- FIG. 7 is a graph showing the relationship between Esw and the ID number of each split electrode when different amounts of water (0 ⁇ L, 45 ⁇ L, 90 ⁇ L, 135 ⁇ L, 180 ⁇ L, 225 ⁇ L) are put into the reaction vessel 114.
- Esw draws different curves depending on the amount of water present in reaction vessel 114 .
- a predetermined threshold X is determined in advance according to the relationship between the Esw of each split electrode and the amount of water in the reaction vessel 114, and it is assumed that water does not exist at the height of the split electrode where the Esw exceeds the threshold X. , the height of the liquid level in the reaction container 114 can be detected.
- the connection state between the stirring units 104 to 109 and the power amplifier 206 or the impedance measurement circuit 207 is determined based on whether or not the liquid in the reaction vessel 114 has been detected. It is.
- FIG. 8 is a schematic diagram showing a case where stirring units 104 and 105 are normally connected to relay boards 802 and 804, and
- FIG. 10 is a schematic diagram showing a case where the device is not installed;
- a relay board 802 provided with a relay group corresponding to the stirring section 104 is normally connected to the stirring section 104 via wiring 803 .
- a relay board 804 provided with a relay group corresponding to the stirring section 105 is normally connected to the stirring section 105 via wiring 805 .
- each connector 201 has the same shape, a wiring connection error or the like during device assembly may cause a relay board 802 provided with a group of relays corresponding to the stirring section 104 to be displaced via a wiring 803 as shown in FIG. Therefore, it may be connected to the stirring unit 105 by mistake.
- the ultrasonic stirring operation set by the dispensing parameters and the like may not be performed during the desired stirring of the reaction vessel 114, and insufficient stirring may adversely affect the analysis results.
- a strong voltage is applied even though the specimen 112 and the reagent 116 are not present, there is a possibility that the stirrer 104 may be damaged due to blank firing.
- control unit uses the cleaning unit 111 to discharge pure water into a specific reaction container 114 (hereinafter, the reaction container is referred to as a reference cell 801). At this time, it is necessary to ensure that no liquid such as pure water, specimen, or reagent exists in the reaction container 114 other than the reference cell 801 .
- control unit rotates the reaction disk 810 to move the reference cell 801 to the stirring position of the stirring unit 104 .
- the control unit confirms the liquid level in the reference cell 801 by the method described above.
- the connector 201 is not erroneously inserted and the relay board 802 and the stirring section 104 are correctly connected by the wiring 803, the liquid level can be detected.
- the connector 201 is erroneously inserted, the liquid level is not detected.
- the liquid level is similarly verified at the stirring positions of the stirring sections 105-109. If the height of pure water in the reference cell 801 can be determined without using all of the split electrodes, the determination may be performed using only some of the split electrodes. Further, the reference cell 801 may contain a liquid other than pure water. Furthermore, a method of detecting only the presence or absence of the liquid instead of the liquid level may be used.
- FIGS. 10 and 11 are flowcharts showing a method of determining whether the connector 201 is correctly inserted into the stirring units 104 to 109.
- FIG. 10 is a part (first half) and FIG. 11 is the remaining part. (Second half).
- the control unit of the automatic analyzer starts an abnormality determination operation (step S101).
- the controller checks the water level of the constant temperature bath 117 (step S102). The water level can be confirmed by using the water level sensor installed in the automatic analyzer, or by detecting the liquid level based on the ImpS measured by the impedance measurement circuit 207 as described above.
- the control unit If the water level of the constant temperature bath 117 has not reached the predetermined level, the control unit outputs a system alarm and terminates the abnormality determination operation (step S103). On the other hand, if the constant temperature bath 117 has reached the predetermined water level, the control unit uses the cleaning unit 111 to discharge pure water into the reference cell 801 (step S104). Dispensing parameters for discharging pure water into the reference cell 801 are stored in the control unit. The amount of pure water discharged to the reference cell 801 can be arbitrarily set as long as it can be measured by each stirring unit.
- control unit rotates the reaction disk 810 to a preset predetermined angle in order to move the reference cell 801 to the stirring position of the stirring unit 104 (step S105).
- the reaction disk 810 is assumed to rotate counterclockwise.
- the control unit attempts to derive Esw of the reference cell 801 using each divided electrode of the stirring unit 104 (step S106).
- Esw is derived from all of the split electrodes (ID numbers 1 to 13) of the piezoelectric element 202, but Esw may be derived using only some of the split electrodes. If Esw cannot be derived due to incorrect insertion of the connector 201 or the like, the control unit outputs a system alarm and terminates the abnormality determination operation (step S107). On the other hand, if Esw can be derived, the control unit stores the derived Esw (step S108), and then determines whether or not Esw derivation has been completed in all stirring units (step S109). At this stage, derivation of Esw other than the stirring unit 104 has not been completed, so the process returns to step S105. Rotate to a set angle.
- the control unit causes the Esw measured at the stirring positions of the stirring units 104 to 109 (assumed to be Esw1, Esw2, Esw3, Esw4, Esw5, and Esw6, respectively) to It is checked whether or not there is a value exceeding the value (threshold value Z) (step S110). If there is no stirring unit satisfying Esw>Z, the level of pure water in the reference cell 801 can be normally detected at the stirring positions of all the stirring units, so the abnormality determination operation ends normally. (step S111).
- the control section outputs a system error (step S112), displays a stirring section where Esw>Z, and terminates the determination operation (step S113).
- Example 2 the inclination state of the automatic analyzer is determined based on the liquid level height of the constant temperature water detected in each stirring section.
- an automatic analyzer has its own weight biased, so the floor corresponding to the heavy portion of the installation location of the automatic analyzer may sink, causing the automatic analyzer to tilt. If the automatic analyzer is tilted, the height of the liquid level in the constant temperature bath 117 or the reaction container 114 varies depending on the location, and liquid leakage may occur or the stirring operation may not be performed according to the set parameters.
- the liquid level of the constant temperature water at each location is detected depending on whether or not the plurality of divided electrodes 204 and 209 provided in the piezoelectric element 202 of each stirrer can detect the constant temperature water. If the constant temperature bath 117 is tilted, there is a possibility that the water level of the constant temperature water varies depending on the location. Therefore, the control unit of this embodiment detects the water level of the constant temperature water at several different locations, and determines the inclination of the constant temperature bath 117 based on whether the difference in water level at each location is within a certain range. judge.
- FIG. 12 is a diagram showing the water level of the constant temperature water when judging the inclination of the constant temperature bath 117.
- the water level of the constant temperature water is set to a level lower than that during the component analysis, for example, one-third the water level at the time of the component analysis.
- the control unit derives Esw at this time using the divided electrodes 204 and 209 of the stirring units 104-109. Furthermore, the control unit compares the derived Esw with the threshold value X by the method described above, and detects the liquid level in each stirring unit.
- FIG. 13 is a graph showing the liquid level height of constant temperature water in each stirring section.
- the relationship between the position of the stirrer and the liquid level of constant temperature water can be approximated by a linear function. If the slope of the linear function is within a preset range, that is, if the lower limit ⁇ the slope of the linear function ⁇ the upper limit, the slope of the constant temperature bath 117 is within the tolerance. , is determined to be no problem. On the other hand, if the slope of the linear function is outside this range, that is, if the slope of the linear function ⁇ the lower limit value or the upper limit value ⁇ the slope of the linear function, the slope of the constant temperature bath 117 is outside the tolerance. part outputs a system alarm.
- the abnormality detection described in Examples 1 and 2 is assumed to be performed at the time of installation of the automatic analyzer, at the time of replacement of the stirring unit, at the time of periodic maintenance, etc. It may be performed every time the analyzer is started up.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- each of the embodiments described above has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the configurations described.
- 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.
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
Description
Digital Synthesizer、以下「DDS」と略記する)301は、任意の周波数の正弦波形電圧を発生させる。DDS301で発生した正弦波形電圧は、アンプ302で増幅され、出力端子217から出力される。出力端子217は、第1切替スイッチ215及びリレー群213を介して分割電極204に接続されており、分割電極204によって、圧電素子202に正弦波形電圧が印加される。
なお、実施例1及び実施例2で説明した異常検知は、自動分析装置の据付時、攪拌部の交換時、定期的に行われるメンテナンス時など、に行われることを想定しているが、自動分析装置を立ち上げる度に行われるようにしても良い。
Claims (8)
- 反応容器へ超音波を照射することにより検体と試薬を攪拌する攪拌部と、
前記攪拌部の圧電素子に電圧を印加する電力増幅器と、
前記攪拌部の圧電素子の電気インピーダンスを測定するインピーダンス測定部と、
前記検体と前記試薬の反応液の成分分析を行う分析部と、
前記攪拌部、前記電力増幅器、前記インピーダンス測定部及び前記分析部を制御する制御部と、を備えた自動分析装置であって、
前記攪拌部を複数有し、
前記制御部は、複数の前記攪拌部について前記インピーダンス測定部で測定した電気インピータンスに基づき、前記攪拌部と前記電力増幅器若しくは前記インピーダンス測定部の接続状態、又は、自動分析装置の傾き状態、を判定する自動分析装置。 - 請求項1に記載の自動分析装置において、
前記反応容器が円周状に配置されて回転可能な反応ディスクをさらに備え、
前記制御部は、前記反応ディスクを回転させることで、純水が吐出された前記反応容器を各前記攪拌部の攪拌位置に移動させ、各前記攪拌部について純水を検知できたか否かによって、接続状態を判定する自動分析装置。 - 請求項2に記載の自動分析装置において、
前記制御部は、前記インピーダンス測定部で測定した電気インピーダンスの周波数特性の揺らぎの大きさによって、前記純水の有無を検知する自動分析装置。 - 請求項3に記載の自動分析装置において、
前記制御部は、前記揺らぎの大きさを導出できない前記攪拌部が存在する場合、または、前記揺らぎの大きさが所定値を超える前記攪拌部が存在する場合、アラームを出力する自動分析装置。 - 請求項1に記載の自動分析装置において、
前記反応容器を所定の温度に保つ恒温水を保持する恒温槽をさらに備え、
前記制御部は、各前記攪拌部において検知された前記恒温水の液面高さによって、前記恒温槽の傾き状態を判定する自動分析装置。 - 請求項5に記載の自動分析装置において、
前記圧電素子は、異なる高さ位置に複数の電極を有し、
前記制御部は、各前記電極が恒温水を検知できたか否かによって、前記恒温水の液面高さを検知する自動分析装置。 - 請求項5に記載の自動分析装置において、
前記制御部が前記恒温槽の傾き状態を判定する時、前記恒温水の水位が成分分析時よりも低い自動分析装置。 - 反応容器へ超音波を照射することにより検体と試薬を攪拌する攪拌部と、
前記攪拌部の圧電素子に電圧を印加する電力増幅器と、
前記攪拌部の圧電素子の電気インピーダンスを測定するインピーダンス測定部と、
前記検体と前記試薬の反応液の成分分析を行う分析部と、を備えた自動分析装置の異常判定方法であって、
複数の前記攪拌部のうち少なくとも2以上の前記攪拌部について前記インピーダンス測定部で測定した電気インピータンスに基づき、前記攪拌部と前記電力増幅器若しくは前記インピーダンス測定部の接続状態、又は、自動分析装置の傾き状態、を判定する異常判定方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023556292A JPWO2023074358A1 (ja) | 2021-10-27 | 2022-10-11 | |
CN202280064976.8A CN118043673A (zh) | 2021-10-27 | 2022-10-11 | 自动分析装置及其异常判定方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-175576 | 2021-10-27 | ||
JP2021175576 | 2021-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023074358A1 true WO2023074358A1 (ja) | 2023-05-04 |
Family
ID=86157922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/037922 WO2023074358A1 (ja) | 2021-10-27 | 2022-10-11 | 自動分析装置及びその異常判定方法 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPWO2023074358A1 (ja) |
CN (1) | CN118043673A (ja) |
WO (1) | WO2023074358A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007040843A (ja) * | 2005-08-03 | 2007-02-15 | Hitachi High-Technologies Corp | 自動分析装置 |
JP2007248413A (ja) * | 2006-03-20 | 2007-09-27 | Toshiba Corp | 自動分析装置及びその水平出し方法 |
JP2010096638A (ja) * | 2008-10-17 | 2010-04-30 | Hitachi High-Technologies Corp | 自動分析装置 |
WO2021256027A1 (ja) * | 2020-06-18 | 2021-12-23 | 株式会社日立ハイテク | 自動化学分析装置および電気インピーダンススペクトル測定器 |
JP2022177414A (ja) * | 2021-05-18 | 2022-12-01 | 株式会社日立ハイテク | 自動化学分析装置、自動化学分析装置用メンテナンスキット、及び自動化学分析装置のメンテナンス方法 |
-
2022
- 2022-10-11 WO PCT/JP2022/037922 patent/WO2023074358A1/ja active Application Filing
- 2022-10-11 JP JP2023556292A patent/JPWO2023074358A1/ja active Pending
- 2022-10-11 CN CN202280064976.8A patent/CN118043673A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007040843A (ja) * | 2005-08-03 | 2007-02-15 | Hitachi High-Technologies Corp | 自動分析装置 |
JP2007248413A (ja) * | 2006-03-20 | 2007-09-27 | Toshiba Corp | 自動分析装置及びその水平出し方法 |
JP2010096638A (ja) * | 2008-10-17 | 2010-04-30 | Hitachi High-Technologies Corp | 自動分析装置 |
WO2021256027A1 (ja) * | 2020-06-18 | 2021-12-23 | 株式会社日立ハイテク | 自動化学分析装置および電気インピーダンススペクトル測定器 |
JP2022177414A (ja) * | 2021-05-18 | 2022-12-01 | 株式会社日立ハイテク | 自動化学分析装置、自動化学分析装置用メンテナンスキット、及び自動化学分析装置のメンテナンス方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2023074358A1 (ja) | 2023-05-04 |
CN118043673A (zh) | 2024-05-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2021256027A1 (ja) | 自動化学分析装置および電気インピーダンススペクトル測定器 | |
JP5140497B2 (ja) | 分析装置及び分析方法 | |
US8252231B2 (en) | Analyzer and its abnormality coping method | |
WO2022244376A1 (ja) | 自動化学分析装置、自動化学分析装置用メンテナンスキット、及び自動化学分析装置のメンテナンス方法 | |
US20210270707A1 (en) | Chemical Analysis Device | |
WO2023074358A1 (ja) | 自動分析装置及びその異常判定方法 | |
EP0694784A1 (en) | Liquid sampling apparatus | |
JP6224371B2 (ja) | 自動分析装置 | |
WO2010032507A1 (ja) | 分注装置、自動分析装置および分注不良確認方法 | |
US7802479B2 (en) | Stirring apparatus, abnormality determining method of same, and analyzer | |
JP2010096638A (ja) | 自動分析装置 | |
JP2009031203A (ja) | 自動分析装置 | |
CN114761811A (zh) | 化学分析装置 | |
WO2023112575A1 (ja) | 自動分析装置 | |
JP6430172B2 (ja) | 臨床検査装置 | |
CN118302673A (zh) | 化学分析装置、化学分析方法 | |
US20240230693A1 (en) | Automatic chemical analyzer, automatic chemical analyzer maintenance kit, and automatic chemical analyzer maintenance method | |
WO2023203925A1 (ja) | 自動分析装置 | |
CN117805027A (zh) | 一种样本分析仪及超声清洗方法 | |
JP2009042048A (ja) | 自動分析装置および自動分析装置の攪拌良否判定方法 | |
JP2010085274A (ja) | 自動分析装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22886687 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023556292 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022886687 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022886687 Country of ref document: EP Effective date: 20240527 |