JP2011215012A - Automatic analyzer and ac motor monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve monitoring accuracy of operating state of an AC motor without using a mechanical sensor.SOLUTION: An automatic analyzer includes: an AC motor included in a pump for supplying pure water for washing a nozzle; a detection section for repeating with a predetermined detection period the detection of at least the one of the voltage and the current of AC supplied to the AC motor; a state determination section for repeatedly determining the stable state or unstable state of the AC motor with a detection period on the basis of the combination of a plurality of detection results by the detection section; and a display section for displaying a warning when the state determination section determines the unstable state.

Description

  The present invention relates to an automatic analyzer that optically or electrically measures the concentration or activity value of a component contained in a sample such as blood or urine using a chemical reaction of a test reagent, and an AC motor of the automatic analyzer. The present invention relates to an AC motor monitoring device to be monitored.

  Conventionally, in an automatic analyzer, an AC motor may be used as a power source for a pump (hereinafter referred to as a pure water supply pump) that supplies pure water for washing the dispensing nozzle and the stirring nozzle to the nozzle. . A pump using an AC motor as a power source is characterized in that a large flow rate can be easily realized and the cost is low. The rotational speed of an AC motor varies due to variations in voltage, current, frequency, etc. in a commercial power source. Due to fluctuations in the rotational speed of the AC motor, the flow rate of pure water discharged from a pump using the AC motor as a power source becomes unstable. The instability of the flow rate in the pure water supply pump affects the cleaning result of the nozzle. That is, there is a possibility that contamination or carryover may occur with respect to the specimen sample due to insufficient washing. In order to prevent the lack of cleaning, a sensor that mechanically monitors whether the AC motor is operating stably (for example, the number of revolutions, etc.) is an automatic analyzer having a pump powered by the AC motor. Installed in the cleaning unit.

  However, there is a cleaning unit in which the mechanical sensor cannot be installed because of its structure.

JP-A-57-182621

  An object of the present invention is to improve the monitoring accuracy of the operating state of an AC motor without using a mechanical sensor.

  According to the first aspect of the present invention, detection of at least one of an AC motor included in a pump that supplies pure water for nozzle cleaning to the nozzle and an AC voltage and current supplied to the AC motor is performed in a predetermined manner. A detection unit that repeats at a detection cycle, a state determination unit that repeatedly determines a stable state or an unstable state of the AC motor at the detection cycle based on a combination of a plurality of detection results by the detection unit, and the state determination unit And a display unit that displays a warning when it is determined that the state is unstable by the automatic analysis device.

  According to a third aspect of the present invention, detection of at least one of an AC voltage and current supplied to an AC motor included in a pump that supplies pure water for nozzle cleaning to the nozzle is repeated at a predetermined detection cycle. Based on a combination of a detection unit and a plurality of detection results by the detection unit, a state determination unit that repeatedly determines a stable state or an unstable state of the AC motor at the detection period, and an unstable state by the state determination unit. An AC motor monitoring device comprising: a warning display unit that displays a warning when determined.

  According to a fourth aspect of the present invention, there is provided an automatic analyzer having an AC motor, wherein the detection unit repeats at least one of an AC voltage and a current supplied to the AC motor at a predetermined detection cycle, and the detection Based on a combination of a plurality of detection results by the unit, a state determination unit that repeatedly determines a stable state or an unstable state of the AC motor at the detection cycle, and a warning when the state determination unit determines that the state is an unstable state An automatic analyzer characterized by comprising: a display unit for displaying.

  According to the present invention, it is possible to improve the monitoring accuracy of the operating state of the AC motor without using a mechanical sensor.

FIG. 1 is a diagram showing an example of the configuration of an automatic analyzer according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a detailed configuration of the detection unit and the state determination unit in FIG. 1. FIG. 3 is a diagram illustrating an example of the circuit of the current detection unit and the circuit of the voltage detection unit in FIG. FIG. 4 is a perspective view showing the appearance of the reaction mechanism of the automatic analyzer shown in FIG. FIG. 5 is a flowchart showing a procedure for monitoring the operating state of the AC motor in the first embodiment. FIG. 6 is a diagram showing an example of the relationship between the output of the photocoupler of the current detection unit in FIG. 4 and the output of the comparator corresponding to the output of the photocoupler belonging to a predetermined current range. FIG. 7 is a diagram illustrating an example of the relationship between the output of the photocoupler of the voltage detection unit in FIG. 4 and the output of the comparator corresponding to the output of the photocoupler belonging to a predetermined voltage range. FIG. 8 is a diagram illustrating the output of the AC state determination processing unit with respect to the output of the current detection unit and the output of the voltage detection unit in FIG. 1. FIG. 9 is a diagram illustrating an example of a determination table of the motor operation determination processing unit in FIG. FIG. 10 is a diagram illustrating the output of the motor operation determination processing unit together with the output of the comparator and the output of the AC state determination processing unit based on the clock pulse supplied from the system control unit of FIG. FIG. 11 is a diagram illustrating a configuration of an AC motor monitoring device according to the second embodiment of the present invention. FIG. 12 is a diagram illustrating a detailed configuration of the detection unit and the state determination unit in FIG. 11. FIG. 13 is a flowchart showing a procedure for monitoring the operating state of the AC motor in the second embodiment. FIG. 14 is a diagram showing a configuration of an automatic analyzer according to the third embodiment of the present invention.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the following description, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram of an automatic analyzer according to this embodiment. As shown in FIG. 1, the automatic analyzer 100 includes a reaction mechanism 30, an analysis unit 50, an output unit 60, an operation unit 70, a system control unit 80, a detection unit 90, a state determination unit 110, an interface (hereinafter referred to as I / F). 700).

  The reaction mechanism 30 includes a photometry unit 32, a dispensing washing pump 34, and a reaction mechanism control unit 36. The reaction mechanism 30 measures a test sample such as blood or urine using a reagent for each test item, and generates measurement data regarding the test sample.

  The photometry unit 32 irradiates a mixture of a test sample and a reagent (hereinafter referred to as a test mixture) with light. The photometry unit 32 converts the light transmitted through the test mixture into absorbance, and generates absorbance data regarding the test sample. The photometry unit 32 outputs the generated absorbance data to the data storage unit 52. The photometry unit 32 irradiates light to a mixture of a standard substance and a reagent (hereinafter referred to as a standard mixture). The standard substance is a substance having the same or common property as the substance to be measured or a substance having a common reaction with a reagent. The photometry unit 32 converts light that has passed through the standard mixture into absorbance, and generates absorbance data relating to the standard substance. The photometry unit 32 outputs absorbance data regarding the standard substance to the data storage unit 52.

  The dispensing cleaning pump 34 has an AC motor 35. The AC motor 35 is rotated by the AC supplied from the AC power source 1. The dispensing washing pump 34 supplies pure water for washing nozzles of various probes for dispensing reagents and samples to the nozzles. The dispensing washing pump 34 is a sample dispensing pump, a first reagent dispensing pump, a second reagent dispensing pump, a washing pump, etc., which will be described later. The AC motor 35 may be disposed outside the dispensing cleaning pump 34.

  The reaction mechanism control unit 36 performs sequence with respect to each element of the reaction mechanism 30 shown in FIG. 4 based on signals from the system control unit 80 regarding analysis items, analysis procedures, and the like input by the user via the operation unit 70. Assemble. The reaction mechanism control unit 36 rotates the reaction disk 310, the disk sampler 330, the first reagent storage 350, and the second reagent storage 370 shown in FIG. 4 at predetermined angles at predetermined timings based on the assembled sequence. . The reaction mechanism control unit 36 rotates and moves the sample arm 336, the first reagent arm 356, and the second reagent arm 376 shown in FIG. 4 based on the assembled sequence, respectively. The reaction mechanism control unit 36 moves the stirrer 324 and the cleaning nozzle and the drying nozzle of the cleaning unit 325 shown in FIG. 4 up and down based on the assembled sequence. The reaction mechanism control unit 36 drives the sample dispensing pump, the first reagent dispensing pump, the second reagent dispensing pump, the washing pump, and the drying pump based on the assembled sequence. The reaction mechanism control unit 36 vibrates the stirrer 324 shown in FIG. 4 based on the assembled sequence.

  The analysis unit 50 includes a sample analysis unit 51 and a data storage unit 52. The sample analyzer 51 generates calibration curve data based on the absorbance data and analysis items related to the data stored in the data storage unit 52. The generated calibration curve data is stored in the data storage unit 52 and output to the output unit 60. Based on the calibration curve data and the absorbance data regarding the test sample stored in the data storage unit 52, the sample analysis unit 51 generates analysis data regarding the concentration and activity value of the component corresponding to the test item. . The generated analysis data is stored in the data storage unit 52 and output to the output unit 60.

  The data storage unit 52 includes a storage medium such as a hard disk. The data storage unit 52 stores absorbance data generated by the photometry unit 32 of the reaction mechanism 30. The data storage unit 52 stores the calibration curve data generated by the sample analysis unit 51 for each standard substance. The data storage unit 52 stores the analysis data generated by the sample analysis unit 51 for each test sample.

  The output unit 60 includes a printing unit 61 and a display unit 62. The output unit 60 outputs the calibration curve and analysis data generated by the analysis unit 50 as a print or display. The printing unit 61 uses an output device such as a printer to print the calibration curve and analysis data generated by the analysis unit 50 on a printer sheet with a predetermined layout. The display unit 62 displays the calibration curve and analysis data generated by the analysis unit 50 in a predetermined layout using a display device such as a CRT (Cathode ray tube) display, a liquid crystal display, or a plasma display. The display unit 62 also includes an analysis condition setting screen for setting analysis conditions such as the sample volume, the first reagent volume, the second reagent volume, and the photometric beam wavelength for each measurement item, An object information setting screen for setting an object ID, an object name, and the like regarding the sample, a measurement item selection screen for selecting a measurement item for each sample, and the like are displayed.

  The display unit 62 displays a determination result of a motor operation state determination processing unit 118 described later. Specifically, when the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 shown in FIG. 1 is in an unstable state, the display unit 62 displays a warning. The unstable state refers to a state where the rotational speed of the AC motor 35 is not constant but fluctuates. The warning is output in a display mode such as red display or blinking. Note that a sound output unit (not shown) may output a warning sound together with a warning display. In addition, when the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is in a stable state, the display unit 62 may display the stable state. The stable state refers to a state where the rotational speed of the AC motor 35 is constant. The display of the stable state is output by a display mode such as blue display or lighting.

  The operation unit 70 includes input devices such as a keyboard, a mouse, various buttons, and a touch key panel. The operation unit 70 uses the analysis conditions of each measurement item input by the user via the input device, the measurement items to be measured for each test sample, the subject ID, the subject name, etc. relating to the test sample as operation signals. Output to the control unit 80.

  The system control unit 80 includes a CPU (Central Processing Unit) and a storage circuit. The system control unit 80 controls each unit in the automatic analyzer 100 in an integrated manner. The system control unit 80 controls each unit based on an operation signal supplied from the operation unit 70, measurement items to be measured for each test sample, analysis conditions for each measurement item, sample information, and the like. The system control unit 80 synchronizes clock pulses, which are timing signals for executing comparison processing, with the comparator 97 and the comparator 98 shown in FIG. 2 in synchronization with 0 ° and 180 ° of AC supplied from the AC power supply 1. Output. The system control unit 80 supplies a clock pulse, which is a timing signal for executing the determination process, to the AC state determination processing unit 112 and the motor operation state determination processing unit 118. Output in sync with. Hereinafter, in the present embodiment, a clock pulse that is a timing signal for executing the comparison process and a clock pulse that is a timing signal for executing the determination process are the same. Note that the clock pulse for the comparison process and the clock pulse for the determination process may be synchronized differently from 0 ° and 180 ° of alternating current. Further, the clock pulse for the comparison process and the clock pulse for the determination process may be different. Further, the clock pulse for the comparison process and the clock pulse for the determination process are synchronized with 0 ° and 180 ° of the alternating current supplied from the alternating current power supply 1 to detect the change in the frequency of the alternating current. Can do.

  Further, the system control unit 80 stops the AC motor 35 via the reaction mechanism control unit 36 shown in FIG. 1 based on the determination result of the motor operation state determination processing unit 118 described later. The system control unit 80 may stop the operation of at least one of the reaction mechanism 30 and the analysis unit 50 based on the determination result of the motor operation state determination processing unit 118 described later.

FIG. 2 is a diagram illustrating an example of a detailed configuration of the detection unit 90 and the state determination unit 110 in FIG.
The detection unit 90 includes a current detection unit 92, a voltage detection unit 94, an analog-digital converter (hereinafter referred to as ADC) 95, an ADC 96, a comparator 97, and a comparator 98. Note that although the motor operation determination accuracy slightly decreases, either current detection or voltage detection may be used. At this time, the output to the AC state determination processing unit 112 is one of current detection and voltage detection. The detection unit 90 detects an alternating current and a voltage supplied to the alternating current motor 35 shown in FIG. Instead of the current detection unit 92 and the voltage detection unit 94 in the detection unit 90, a detector that detects AC power may be used.

  The current detection unit 92 detects an alternating current. The voltage detector 94 detects the AC voltage. FIG. 3 is a diagram illustrating an example of the circuit of the current detection unit 92 and the circuit of the voltage detection unit 94 in FIGS. 1 and 2. The current detection unit 92 and the voltage detection unit 94 detect an alternating current and a voltage by the photocoupler ph1 and the photocoupler ph2, respectively. The output of the photocoupler ph1 is input to the ADC 95. The output of the photocoupler ph2 is input to the ADC 96. The photocoupler ph1 and the photocoupler ph2 are used for the purpose of electrically separating the AC power supply 1 and the circuits after the photocoupler. Note that an element other than a photocoupler may be used as an element for detecting an AC voltage and current.

  Capacitors in each of the current detection unit 92 and the voltage detection unit 94 are connected to alleviate rapid fluctuations in the frequency of the AC supplied from the AC power supply 1. The resistors connected in series to the photocoupler ph1 and the photocoupler ph2 are connected in order to obtain voltage values suitable for the diodes in the photocoupler ph1 and the photocoupler ph2. The resistors connected in parallel to each of the photocoupler ph1 and the photocoupler ph2 are connected to obtain a current value suitable for the diode in each of the photocoupler ph1 and the photocoupler ph2.

  The ADC 95 repeatedly converts the output from the photocoupler ph1 of the current detection unit 92 into a digital signal at a cycle (hereinafter referred to as a detection cycle) based on a clock pulse supplied from the system control unit 80.

  The comparator 97 repeatedly compares the current value corresponding to the output of the ADC 95 with an upper limit value and a lower limit value of a preset AC current range in the detection cycle. When the current value corresponding to the output of the ADC 95 is outside the current range, the comparator 97 repeatedly outputs a signal corresponding to the code “0” to the AC state determination processing unit 112 in the detection cycle. When the current value corresponding to the output of the ADC 95 is within the current range, the comparator 97 repeatedly outputs a signal corresponding to the code “1” to the AC state determination processing unit 112 at the detection period. Note that the signal corresponding to the code “1” or the signal corresponding to the code “0” output from the comparator 97 has been described in association with the current range inside / outside, but the output of the comparator 97 and the current range inside / outside Combinations other than those described above may be used. The detection period can be arbitrarily set.

  The ADC 96 repeatedly converts the output from the photocoupler ph1 of the voltage detection unit 94 into a digital signal at the detection cycle. The comparator 98 repeatedly compares the voltage value corresponding to the output of the ADC 96 with an upper limit value and a lower limit value of a preset AC voltage range in the detection cycle. When the voltage value corresponding to the output of the ADC 96 is outside the voltage range, the comparator 98 repeatedly outputs a signal corresponding to the code “0” to the AC state determination processing unit 112 in the detection cycle. When the voltage value corresponding to the output of the ADC 95 is within the voltage range, the comparator 98 repeatedly outputs a signal corresponding to the code “1” to the AC state determination processing unit 112 at the detection period. Note that the signal corresponding to the code “1” or the signal corresponding to the code “0” output from the comparator 98 has been described in association with the voltage range inside / outside, but the output of the comparator 98 and the voltage range inside / outside Combinations other than those described above may be used. The function of detecting the current and voltage in the detection unit 90 will be described in detail in the following AC motor monitoring function.

  The state determination unit 110 includes an AC state determination processing unit 112, a motor operation state determination processing unit 118, a memory 114 and a memory control unit 116 shown in FIG. The AC state determination processing unit 112 repeatedly determines the AC state supplied to the AC motor 35 shown in FIG. 1 at the detection period based on the output of the comparator 97 and the output of the comparator 98. The function for determining the AC state will be described in detail in the following AC motor monitoring function.

  The memory 114 stores an AC state determination result (hereinafter referred to as an AC state determination result) output from the AC state determination processing unit 112. Note that a register that temporarily stores the determination result may be used instead of the memory 114.

  The memory control unit 116 controls the memory 114 that stores a plurality of AC state determination results based on the output from the system control unit 80. For example, when the number of AC state determination results used in the motor operation state determination processing unit 118 is five, the memory control unit 116 counts from the latest AC state determination result and outputs five AC state determination results. The memory 114 is controlled so as to output to the motor operation state processing unit 118 at the detection cycle.

  The motor operation state determination processing unit 118 repeatedly determines the operation state of the AC motor 35 shown in FIG. 1 at the detection period based on the latest n AC state determination results output from the memory 114. The function for determining the operating state of the AC motor 35 will be described in detail in the following AC motor monitoring function. A determination result (hereinafter referred to as an operation state determination result) regarding the operation state of AC motor 35 is output to display unit 62 and system control unit 80. In addition, although the period which outputs an operation | movement determination result and the detection period demonstrated above as what is equal, you may differ.

  For example, a network is connected to the I / F 700. The automatic analyzer 100 may be connected to a PACS (Picture Archiving and Communication System) or the like via a network.

FIG. 4 is a perspective view showing the appearance of the reaction mechanism 30. As shown in FIG.
Reaction disk 310, disk sampler 330, first reagent container 350, second reagent container 370, sample probe 334, sample arm 336, first reagent probe 354, first reagent arm 356, second reagent probe 374, second reagent arm 376, a stirring unit 320, a cleaning unit 325, and a photometry unit 32.

  The reaction disk 310 rotatably holds a plurality of reaction vessels 312 arranged on the circumference. The reaction vessel 312 is accommodated in a thermostatic chamber in the reaction disk 310. The reaction disk 310 stops after rotating at a predetermined angle for each analysis cycle. Thereby, the reaction vessel 312 is rotated by a predetermined angle.

  The disk sampler 330 holds the sample container 332 in a rotatable manner. The sample container 332 contains a sample such as a standard substance or a test sample.

  The first reagent storage 350 has a plurality of first reagent containers 352. The second reagent storage 370 has a plurality of second reagent containers 372. In the first reagent container 352 and the second reagent container 372, reagents that react with the components of the respective inspection items are stored.

  The sample probe 334 is attached to the tip of the sample arm 336. The sample arm 336 supports the sample probe 334 so as to be rotatable. The sample probe 334 sucks the sample from the sample container 332 at the position for sucking the sample on the disk sampler 330 by the sample dispensing pump. The sample probe 334 discharges the sucked sample to the reaction container 312 at the position where the sample on the reaction disk 310 is discharged.

  The first reagent probe 354 is attached to the tip of the first reagent arm 356. The first reagent arm 356 supports the first reagent probe 354 so as to be rotatable and vertically movable. The first reagent probe 354 sucks the first reagent from the first reagent container 352 at the position for sucking the first reagent on the first reagent storage 350 by the first reagent dispensing pump. The first reagent probe 354 discharges the aspirated first reagent to the reaction container 312 on the reaction disk 310 at a position where the first reagent is discharged.

  The second reagent probe 374 is attached to the tip of the second reagent arm 376. The second reagent arm 376 supports the second reagent probe 374 so as to be rotatable and vertically movable. The second reagent probe 374 sucks the second reagent from the second reagent container 372 at the position for sucking the second reagent on the second reagent storage 370 by the second reagent dispensing pump. The second reagent probe 374 discharges the aspirated second reagent into the reaction container 312 on the reaction disk 310 at a position where the second reagent is discharged.

  The stirring unit 320 includes a stirring arm 322 and a stirring bar 324. The stirring bar 324 is attached to the tip of the stirring arm 322. The stirring arm 322 supports the stirring bar 324 so as to be rotatable and vertically movable. The stirring arm 322 inserts the stirring bar 324 from the standby position into the reaction container 312 stopped at the position where the test mixture in the reaction container 312 on the reaction disk 310 is stirred. When the tip of the stirring bar 324 is lowered to the vicinity of the inner bottom surface of the reaction vessel 312, the stirring arm 322 stops the lowering of the stirring bar 324. After the stirring bar 324 is stopped, the stirring bar 324 vibrates under the control of the reaction mechanism control unit 36. As the stirring bar 324 vibrates, the mixed solution (sample and first reagent, sample and second reagent, sample, first reagent and second reagent) in the reaction vessel 312 is stirred. After stirring, the stirring arm 322 raises the stirring bar 324 to the standby position.

  The photometry unit 32 irradiates the reaction container 312 rotated by the reaction disk 310 with light. The photometry unit 32 generates absorbance data by converting light transmitted through the mixed solution in the reaction vessel 312 into absorbance. The photometry unit 32 outputs the generated absorbance data to the data storage unit 52.

  The cleaning unit 325 includes a support mechanism, a cleaning nozzle, and a drying nozzle. The support mechanism supports the cleaning nozzle and the drying nozzle so as to be movable up and down, respectively. The cleaning nozzle sucks the liquid mixture from the reaction container 312 at the position where the reaction container 312 is cleaned on the reaction disk 310 by a cleaning pump. After sucking the mixed solution, the cleaning nozzle discharges pure water to clean the inside of the reaction vessel 312. The drying nozzle dries the inside of the reaction vessel 312 in a position for drying the reaction vessel 312 on the reaction disk 310 by a drying pump.

(AC motor monitoring function)
The AC motor monitoring function is a function for monitoring the operating state of the AC motor 35 used in the dispensing washing pump 34 in the automatic analyzer 100. Hereinafter, processing according to the AC motor monitoring function (hereinafter referred to as AC motor monitoring processing) will be described.

FIG. 5 is a flowchart showing the procedure of the AC motor monitoring process.
Prior to automatic analysis of the test sample, setting of analysis conditions for each measurement item input by the user via the input device of the operation unit 70, determination of measurement items to be measured for each test sample, The sample ID, the subject name, and the like are output to the system control unit 80. These analysis conditions, measurement items, subject ID, subject name, and the like are stored in an internal storage device (not shown). When these inputs / settings are completed, automatic analysis for the test sample is started. When automatic analysis is started, AC is supplied from the AC power source 1 to the AC motor 35. When alternating current is supplied to the alternating current motor 35, the alternating current and the alternating voltage are repeatedly detected in the detection cycle (step Sa1).

  FIG. 6 is a diagram showing an example of the relationship between the output of the photocoupler ph1 and the output of the comparator 97 corresponding to the output of the photocoupler belonging to the predetermined current range. A range R1 from the current value A1 to the current value A2 is a preset AC current range. The digital signal input to the comparator 97 is repeatedly compared with the current range R1 preset in the comparator 97 in the detection period. When the detected current value is within the current range, the comparator 97 outputs a signal corresponding to the code “1” to the AC state determination processing unit 112. When the detected current value is outside the current range, the comparator 97 outputs a signal corresponding to the code “0” to the AC state determination processing unit 112. In FIG. 6, a signal corresponding to the code “1” represents a current value in the vicinity of 0 amperes. In FIG. 6, the signal corresponding to the code “0” represents the current value excluding the vicinity of 0 amperes. Note that the current range set in the comparator 97 may be a current range other than R1. In addition, the current range can be set as a threshold (more than a certain current value or less than a certain current value) process. Further, the comparator 97 outputs a signal corresponding to the code “0” to the AC state determination processing unit 112 when the detected current value is within the current range, and when the detected current value is outside the current range. A signal corresponding to the code “1” may be output to the AC state determination processing unit 112.

  FIG. 7 is a diagram showing an example of the relationship between the output of the photocoupler ph2 and the output of the comparator 98 corresponding to the output of the photocoupler belonging to the predetermined voltage range. A range R2 from the voltage value V1 to the voltage value V2 is a preset AC voltage range. The digital signal input to the comparator 98 is repeatedly compared with the voltage range R2 preset in the comparator 98 in the detection period. When the detected voltage value is within the voltage range, the comparator 98 outputs a signal corresponding to the code “1” to the AC state determination processing unit 112. When the detected voltage value is outside the voltage range, the comparator 98 outputs a signal corresponding to the code “0” to the AC state determination processing unit 112. In FIG. 7, the signal corresponding to the code “1” represents a voltage value near 0 volts. In FIG. 7, the signal corresponding to the code “0” represents the voltage value excluding the vicinity of 0 volts. The voltage range set in the comparator 98 may be a range other than R2. The voltage range can also be set as a threshold value process (a voltage value or more or a voltage value or less). Further, the comparator 98 outputs a signal corresponding to the code “0” to the AC state determination processing unit 112 when the detected voltage value is within the voltage range, and when the detected voltage value is outside the current range. A signal corresponding to the code “1” may be output to the AC state determination processing unit 112.

  Subsequently, the AC state determination processing unit 112 repeats the AC state at the detection period based on both the voltage state and the current state, that is, based on the output of the comparator 97 and the output of the comparator 98. Determination is made (step Sa2).

  In order to determine the state of alternating current supplied to the alternating current motor 35, for example, a logic circuit is used. Hereinafter, the AC state determination processing unit 112 will be described using a logic circuit corresponding to a logical sum as an example.

  FIG. 8 is a truth table for explaining determination of an AC state by a logic circuit. P in FIG. 8 indicates a code “1” or code “0” regarding the output of the comparator 97, and Q indicates a code “1” or code “0” regarding the output of the comparator 98. Based on the value of the P code and the value of the Q code, the output of the AC state determination processing unit 112 is output as a logical sum (hereinafter referred to as P + Q). Hereinafter, for convenience of explanation, when P + Q is code “1”, it is set to H (High) level, and when P + Q is code “0”, it is set to L (Low) level. The H level represents an AC state having a current value near 0 amperes or a voltage value near 0 volts. The L level represents an AC state having a current value excluding the vicinity of 0 amperes and a voltage value excluding the vicinity of 0 volts. According to the truth table of FIG. 8, for example, when both P and Q are code “0”, P + Q is code “0”. Accordingly, the output of the AC state determination processing unit 112 is at the L level. When P and Q are out of order and are code “0” and code “1”, P + Q is code “1”. Accordingly, the output of the AC state determination processing unit 112 is at the H level. When both P and Q are code “1”, P + Q is code “1”. Accordingly, the output of the AC state determination processing unit 112 is at the H level. The AC state determination processing unit 112 has been described using a logic circuit corresponding to logical sum as an example, but the AC state determination processing unit 112 is not limited to a logic circuit corresponding to logical sum. That is, in order to determine the AC state, a logic circuit other than the logical sum (for example, logical product), a circuit other than the logical circuit, a lookup table (LUT: Look Up Table), or the like may be used.

  After step Sa2, the AC state determination result (H level or L level) is sequentially stored in the memory 114 of FIG. The operating state of AC motor 35 is determined by a plurality of consecutive AC state determination results. Here, five AC state determination results are used. The five detection periods corresponding to the five AC state determination results correspond to 2.5 times the 1/4 period of the AC.

  The memory control unit 116 outputs five AC state determination results to the motor operation state determination processing unit 118. Based on the five AC state determination results output to the motor operation state determination processing unit 118, the operation state of the AC motor 35 is determined in the detection cycle (step Sa3). By determining the operation of the AC motor 35 based on a plurality (five in step Sa3) of AC state determination results, it is possible to suppress the deviation between the AC state and the motor rotation state.

  FIG. 9 is a diagram illustrating an example of a table for determining a stable state or an unstable state of the operation of the AC motor 35 with respect to the motor operation state determination processing unit 118 in FIG. 1. In FIG. 9, since the number of AC state determination results is 5, the output from the AC state determination processing unit 112 is any one of 0 to 5 times for the H level. Similarly, the L level is any one of 0 to 5 times. However, since the output from the AC state determination processing unit 112 is either the H level or the L level, there is a limitation that the number of times of the H level + the number of times of the L level = 5. The operation state determination result indicates that the greater the number of H levels, the more AC states having a current value near 0 amperes or a voltage value near 0 volts. Therefore, the operation of AC motor 35 becomes unstable as the number of times of H level in the operation determination result increases. As an example, when the H level is four times or more, the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is unstable (F in FIG. 9, hereinafter referred to as F). At this time, the motor operation state determination processing unit 118 outputs a signal corresponding to F to the display unit 62 and the system control unit 80. When the H level is 3 times or less, the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is stable (T in FIG. 9 and hereinafter referred to as T). At this time, the processing from step Sa1 to step Sa3 is repeated (step Sa4). Note that the determination of the operating state of the AC motor 35 in FIG. 9 is a majority decision, but a determination other than the majority decision may be used. For example, the stability of the operation of the AC motor 35 may be determined by calculating an average value for a plurality of AC state determination results.

  Hereinafter, it will be described with reference to FIG. 10 that the operation of the AC motor 35 is determined to be unstable when the H level is four times or more.

  10 shows, based on the clock pulse supplied from the system control unit 80 of FIG. 1, the output of the motor operation state determination processing unit 118, the comparator related to the output of the comparator 97 representing the current state, and the comparator representing the voltage state. It is a figure shown with the code | cord | chord regarding the output of 98, and the output (H level or L level) of the alternating current state determination process part 112. FIG. The AC motor normal operation period is a period during which the AC motor 35 is operating normally because the AC voltage and current supplied from the AC power supply 1 to the AC motor 35 are stable. At this time, the AC current supplied from the AC power source 1 to the AC motor 35 is, for example, FIG. 6, and the AC voltage supplied from the AC power source 1 to the AC motor 35 is, for example, FIG. 7. In FIG. 9, regarding the output of the AC state determination processing unit 112 by the normal AC current and voltage, one H level appears per ¼ period of AC. Further, from FIG. 9, 2.5 times the quarter period of stable alternating current corresponds to five detection periods. From these things, it is determined that the alternating current supplied from the alternating current power supply 1 is stable when the H level of the five alternating state determination results belonging to the five detection cycles is 3 times or less. On the other hand, regarding the five AC state determination results belonging to the five detection cycles, when the H level is 4 times or more, it is determined that the AC supplied from the AC power supply 1 is unstable. Therefore, if the H level is 4 times or more, it is determined that the operation of AC motor 35 is unstable.

  In FIG. 10, I1 to I13 indicate H level or L level repeatedly output by the AC state determination processing unit 112 in the detection period. Data 1 to data 8 indicate data corresponding to T or F that are repeatedly output by the motor operation state determination processing unit 118 in the detection cycle.

  Hereinafter, in order to simplify the description, it is assumed that the number of AC state determination results used in the motor operation state determination processing unit 118 is five. Data 1 becomes data corresponding to T by the majority decision shown in FIG. 9 based on the AC state determination results from I1 to I5 output from the memory 114. The data 2 becomes data corresponding to T by the majority decision shown in FIG. 9 based on the AC state determination results from I2 to I6 output from the memory 114. Similarly, for data 3 to data 8, data corresponding to T is generated in the detection cycle by the majority decision shown in FIG.

  Note that, for example, if the AC motor 35 fails due to disconnection or the like, no current flows, so the AC waveform in FIG. 6 has a current value near 0. Therefore, P in FIG. 8 becomes a code “1” over a period in which the AC motor 35 has failed. The AC state determination result P + Q becomes the code “1”, that is, the H level over the period in which the AC motor 35 has failed. The operation state determination result in FIG. 9 corresponds to F at the High level of 5 times and the Low level of 0 times. Therefore, it is determined that the operation of the AC motor 35 is unstable.

  When the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is unstable, the display unit 62 displays a warning (step Sa5). When the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is unstable, the system control unit 80 stops the AC motor 35 via the reaction mechanism control unit 36, the reaction mechanism 30, and the analysis. The operation of the unit 50 may be stopped.

  After step Sa5, the processes from step Sa1 to step Sa5 are repeated until the automatic analysis is completed (step Sa6).

According to the configuration described above, the following effects can be obtained.
According to this automatic analyzer, an AC motor can be detected without using a mechanical sensor for the AC motor by detecting at least one of an AC current and an AC voltage supplied from the AC power source to the AC motor. Can monitor the instability of the operation. Furthermore, since the determination process is performed a plurality of times when the operating state of the AC motor is monitored, the monitoring accuracy can be improved. Further, when instability of the operation of the AC motor is detected or when the AC motor fails, it is possible to warn the user and stop the automatic analyzer. For these reasons, the automatic analyzer having a pure water supply pump using an AC motor as a power source can prevent contamination and carryover related to the specimen sample due to insufficient washing.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
FIG. 11 shows a block configuration diagram of the AC motor monitoring device according to the present embodiment. The AC motor monitoring device 3 in FIG. 11 is connected to the automatic analyzer 200 via the I / F 700. Hereinafter, different components in the components of the second embodiment and the first embodiment will be described.

  The AC motor monitoring device 3 includes a detection unit 90, a state determination unit 110, a determination processing control unit 120, and a warning display unit 620.

  FIG. 12 is a diagram illustrating an example of a detailed configuration regarding the detection unit 90 and the state determination unit 110 in FIG. 11.

  The determination processing control unit 120 synchronizes the comparator 97 and the comparator 98 shown in FIG. 12 with clock pulses, which are timing signals for executing the comparison processing, at 0 ° and 180 ° of AC supplied from the AC power supply 1. To output. The determination processing control unit 120 supplies a clock, which is a timing signal for executing the determination processing, to the AC state determination processing unit 112 and the motor operation state determination processing unit 118. Output in sync with. Hereinafter, in the present embodiment, a clock pulse that is a timing signal for executing the comparison process and a clock pulse that is a timing signal for executing the determination process are the same. Note that the clock pulse for the comparison process and the clock pulse for the determination process may be synchronized differently from 0 ° and 180 ° of alternating current. Further, the clock pulse for the comparison process and the clock pulse for the determination process may be different. Further, the clock pulse for the comparison process and the clock pulse for the determination process are synchronized with 0 ° and 180 ° of the alternating current supplied from the alternating current power supply 1 to detect the change in the frequency of the alternating current. Can do.

  The detection unit 90 includes a current detection unit 92, a voltage detection unit 94, an ADC 95, an ADC 96, a comparator 97, and a comparator 98. Note that although the motor operation determination accuracy slightly decreases, either current detection or voltage detection may be used. At this time, the output to the AC state determination processing unit 112 is one of current detection and voltage detection. Instead of the current detection unit 92 and the voltage detection unit 94 in the detection unit 90, a detector that detects AC power may be used.

  The comparator 97 sets the current value corresponding to the output of the ADC 95 to a cycle based on a clock pulse supplied from the determination processing control unit 120 with respect to an upper limit value and a lower limit value of an AC current range set in advance (hereinafter referred to as a cycle). In the same manner as in the first embodiment, it is called a detection cycle) and comparison is repeated. The comparator 98 repeatedly compares the voltage value corresponding to the output of the ADC 96 with a detection cycle with respect to an upper limit value and a lower limit value of a preset AC voltage range.

  The state determination unit 110 includes an AC state determination processing unit 112, a motor operation state determination processing unit 118, a memory 114, and a memory control unit 116. Based on the output of the comparator 97 and the output of the comparator 98, the AC state determination processing unit 112 repeatedly determines the AC state supplied to the AC motor 35 shown in FIG.

  The memory control unit 116 controls the memory 114 that stores a plurality of AC state determination results based on the output from the determination processing control unit 120. For example, when the number of AC state determination results used in the motor operation state processing unit 118 is five, the memory control unit 116 counts from the latest AC state determination result and outputs five AC state determination results to the motor. The memory 114 is controlled to output to the operation state processing unit 118.

  Based on the latest n AC state determination results output from the memory 114, the motor operation state determination processing unit 118 repeatedly determines the operation state of the AC motor 35 shown in FIG. The function for determining the operation of the AC motor 35 is the same as in the first embodiment. The determination result of the operation of the AC motor 35 (hereinafter referred to as the operation state determination result as in the first embodiment) is output to the system control unit 80 via the warning display unit 620 and the I / F 700 of the automatic analyzer 200. Is done.

  The warning display unit 620 displays the determination result of the motor operation state determination processing unit 118. Specifically, when the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 shown in FIG. 12 is in an unstable state, the warning display unit 620 displays a warning. The warning is output in a display mode such as red display or blinking. Note that a sound output unit (not shown) may output a warning sound together with a warning display. In addition, when the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is in a stable state, the display unit 62 may display the stable state. The display of the stable state is output by a display mode such as blue display or lighting.

(AC motor monitoring function)
The AC motor monitoring function is a function for monitoring the operating state of the AC motor 35 included in the dispensing cleaning pump 34 in the automatic analyzer 200. Hereinafter, processing according to the AC motor monitoring function (hereinafter referred to as AC motor monitoring processing as in the first embodiment) will be described.

FIG. 13 is a flowchart showing the procedure of the AC motor monitoring process.
When alternating current is supplied to the alternating current motor 35, the alternating current and the alternating voltage are repeatedly detected at the detection period based on a predetermined clock pulse output from the determination processing control unit 120 ( Step Sb1).

  Subsequently, the AC state determination processing unit 112 repeats the AC state at the detection period based on both the voltage state and the current state, that is, based on the output of the comparator 97 and the output of the comparator 98. Determination is made (step Sa2). After step Sa2, when the AC state is repeatedly determined in the detection cycle, the AC state determination result is stored in the memory 114 of FIG. The operating state of the AC motor 35 is determined by n consecutive AC state determination results. Here, five AC state determination results are used. The five AC state determination results correspond to 2.5 times the 1/4 period of AC.

  The memory control unit 116 outputs the latest five AC state determination results to the motor operation state determination processing unit 118. Based on the five AC state determination results output to the motor operation state determination processing unit 118, the operation state of the AC motor 35 is determined in the detection cycle (step Sa3). By determining the operation of the AC motor 35 based on a plurality (five in step Sa3) of AC state determination results, it is possible to suppress the deviation between the AC state and the motor rotation state.

  As an example, the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is unstable when the H level is four times or more. At this time, the motor operation state determination processing unit 118 outputs a signal corresponding to the unstable operation to the warning display unit 620 and the system control unit 80 of the automatic analyzer 200. When the H level is 3 times or less, the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is stable. At this time, the processing from step Sa1 to step Sa3 is repeated (step Sa4).

  When the motor operation state determination processing unit 118 determines that the operation of the AC motor 35 is unstable, the warning display unit 620 displays a warning (step Sb5). The system control unit 80 may stop the AC motor 35 or stop the operations of the reaction mechanism 30 and the analysis unit 50 via the reaction mechanism control unit 36.

  After step Sb5, the processes from step Sb1 to step Sb5 are repeated until the automatic analysis is completed (step Sa6).

According to the configuration described above, the following effects can be obtained.
According to this AC motor monitoring device, the AC motor of the automatic analyzer is mechanically detected by detecting at least one of an AC current and an AC voltage supplied from the AC power source to the AC motor of the automatic analyzer. Instability of the operation of the AC motor can be monitored without using a simple sensor. Furthermore, since the determination process is performed a plurality of times when the operating state of the AC motor is monitored, the monitoring accuracy can be improved. Further, when instability of the operation of the AC motor is detected or when the AC motor fails, the user can be warned or the automatic analyzer can be stopped. For these reasons, the automatic analyzer that has the pure water supply pump connected to this AC motor monitoring device and powered by the AC motor can prevent contamination and carryover of the specimen sample due to insufficient washing. it can.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.
FIG. 14 is a block diagram of the automatic analyzer according to the present embodiment. Differences between the present embodiment and the first embodiment will be described below.

  In FIG. 1, the AC motor 35 to be monitored in the first embodiment is included in a dispensing cleaning pump 34. On the other hand, the monitored AC motor 35 in the third embodiment of FIG. 14 is an arbitrary AC motor 35 included in the reaction mechanism 30.

(AC motor monitoring function)
The AC motor monitoring function is a function for monitoring the operating state of the AC motor 35 in the automatic analyzer 300. Processing according to the AC motor monitoring function is the same as in the first embodiment. A flowchart showing the procedure of the processing follows FIG.

According to the configuration described above, the following effects can be obtained.
According to the automatic analyzer, a mechanical sensor is used for the AC motor of the automatic analyzer by detecting at least one of an AC current and an AC voltage supplied from the AC power source to the AC motor. Instability of the operation of the AC motor can be monitored. Furthermore, since the determination process is performed a plurality of times when the operating state of the AC motor is monitored, the monitoring accuracy can be improved. Further, when instability of the operation of the AC motor is detected or when the AC motor fails, the user can be warned or the automatic analyzer can be stopped. For these reasons, the automatic analyzer having an AC motor can prevent contamination and carryover with respect to the specimen sample due to insufficient cleaning, for example.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  DESCRIPTION OF SYMBOLS 1 ... AC power source, 3 ... AC motor monitoring apparatus, 30 ... Reaction mechanism, 32 ... Photometry part, 34 ... Dispensing washing pump, 35 ... AC motor, 36 ... Reaction mechanism control part, 50 ... Analysis part, 51 ... Sample analysis , 52 ... Data storage unit, 60 ... Output unit, 61 ... Printing unit, 62 ... Display unit, 70 ... Operation unit, 80 ... System control unit, 90 ... Detection unit, 92 ... Current detection unit, 94 ... Voltage detection unit 95 ... ADC, 96 ... ADC, 97 ... comparator, 98 ... comparator, 100 ... automatic analyzer, 110 ... state determination unit, 112 ... AC state determination processing unit, 114 ..., memory, 116 ... memory control unit, DESCRIPTION OF SYMBOLS 118 ... Motor operation state determination process part, 120 ... Determination process control part, 200 ... Automatic analyzer, 300 ... Automatic analyzer, 310 ... Reaction disk, 312 ... Reaction container, 320 ... Stirring part, 322 ... Stirring arm, 324 ... Stirring 325: Washing unit, 330 ... Disc sampler, 332 ... Sample container, 334 ... Sample probe, 336 ... Sample arm, 350 ... First reagent storage, 352 ... First reagent container, 354 ... First reagent probe, 356 ... First 1 reagent arm, 370: second reagent storage, 372: second reagent container, 374: second reagent probe, 376: second reagent arm, 620: warning display part, 700: I / F

Claims (4)

An AC motor included in a pump that supplies pure water for nozzle cleaning to the nozzle;
A detection unit that repeats detection of at least one of an AC voltage and a current supplied to the AC motor at a predetermined detection cycle;
A state determination unit that repeatedly determines a stable state or an unstable state of the AC motor in the detection cycle based on a combination of a plurality of detection results by the detection unit;
A display unit that displays a warning when the state determination unit determines an unstable state;
The automatic analyzer characterized by comprising. The state determination unit repeatedly determines a stable state or an unstable state of the AC motor at a detection cycle by majority based on a plurality of detection results by the detection unit;
The automatic analyzer according to claim 1. A detection unit that repeats detection of at least one of an AC voltage and current supplied to an AC motor included in a pump that supplies pure water for nozzle cleaning to the nozzle at a predetermined detection cycle;
A state determination unit that repeatedly determines a stable state or an unstable state of the AC motor in the detection cycle based on a combination of a plurality of detection results by the detection unit;
A warning display unit that displays a warning when the state determination unit determines an unstable state;
An AC motor monitoring device comprising: In an automatic analyzer having an AC motor,
A detection unit that repeats detection of at least one of an AC voltage and a current supplied to the AC motor at a predetermined detection cycle;
A state determination unit that repeatedly determines a stable state or an unstable state of the AC motor in the detection cycle based on a combination of a plurality of detection results by the detection unit;
A display unit that displays a warning when the state determination unit determines an unstable state;
The automatic analyzer characterized by comprising.

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