CN113019719B - Active reporting centrifuge abnormal state early warning system and method - Google Patents
Active reporting centrifuge abnormal state early warning system and method Download PDFInfo
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- CN113019719B CN113019719B CN202110294142.3A CN202110294142A CN113019719B CN 113019719 B CN113019719 B CN 113019719B CN 202110294142 A CN202110294142 A CN 202110294142A CN 113019719 B CN113019719 B CN 113019719B
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- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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Abstract
The invention relates to an active warning system and method for reporting abnormal states of a centrifugal machine, wherein the active warning system comprises a centrifugal machine body, a cloud platform and an application client, wherein the centrifugal machine body sends abnormal state data of the centrifugal machine to the cloud platform through a wireless network; the cloud platform installation database is used for storing abnormal state data of the centrifuge, and the cloud platform also deploys a background application program of the application client; the application client calls a background application program of the cloud platform through an API (application programming interface) technology, and the application client and the cloud platform transmit data through a wireless network. The centrifuge actively reports various abnormal states, and abnormal conditions can be checked in time through the application terminal, so that operation of an operator on the centrifuge in later work is more standardized, and unnecessary damage to the centrifuge is avoided.
Description
Technical Field
The invention relates to the technical field of centrifuge control, in particular to an active warning system and method for reporting abnormal states of a centrifuge.
Background
The centrifuge is mainly used for separating solid particles from liquid in suspension, or separating two liquids which have different densities and are insoluble with each other in emulsion (for example, cream is separated from milk); it can also be used to remove liquids from wet solids, such as by spin drying clothes in a washing machine; the special overspeed tubular separator can also separate gas mixtures with different densities; the centrifuge product is mainly applied to the medical industry, the food safety detection industry, the beauty industry and the chemical laboratory by utilizing the characteristic that solid particles with different densities or particle sizes have different sedimentation speeds in liquid.
In practice centrifuge operation often occurs as follows: operators forget to place the separated substances in the centrifuge for a long time, and the long time can influence the test result; the use of the centrifuge needs professional training, but in actual operation, professional personnel can sometimes enable non-professional personnel to work on duty; the operation of operators is improper, so that the whole centrifugal rotor is not balanced, the rotor is unbalanced when rotating, the state of the centrifugal machine in abnormal working can not be reported, the damage of the centrifugal machine can be caused when the centrifugal machine works in the abnormal state for a long time, and meanwhile, the inconvenience is brought to the personnel management.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an active warning system and method for reporting the abnormal state of a centrifuge, which solves the problems that: the centrifuge actively reports various abnormal states, and abnormal conditions can be checked in time through the application terminal, so that operation of an operator on the centrifuge in later work is more standardized, and unnecessary damage to the centrifuge is avoided.
The technical scheme adopted by the invention is as follows: an active warning system and method for reporting abnormal state of a centrifuge comprise a centrifuge body, a cloud platform and an application client, wherein the centrifuge body actively sends abnormal state data of the centrifuge to the cloud platform through a wireless network; the cloud platform can be provided with various databases (mysql or oracle) and background application programs, the databases are used for storing abnormal state data of the centrifuge and system data, the application client performs data interaction with the background application programs and the databases through an API (application programming interface) technology, and the application client and the cloud platform transmit data through a wireless network; the application client is used for counting and inquiring abnormal state data of the centrifuge body.
Wherein, the application client includes: PC client and/or cell phone APP.
The centrifugal machine body comprises a microcontroller, an RFID card reader, a door control and door lock signal detection module, a current acquisition module, a temperature acquisition module, a refrigeration module, a balance detection module and a main communication module; the RFID card reader, the door control and door lock signal detection module, the current acquisition module, the temperature acquisition module, the refrigeration module, the balance detection module and the main communication module are all connected with the microcontroller.
The RFID card reader is used for identifying identity information of an operator and acquiring the model of the centrifugal rotor so as to determine the corresponding work starting current and the maximum allowable work rotating speed of the centrifugal rotor.
The door control and door lock signal detection module controls the transmission device through the driving circuit, drives the door lock to work, and drives the upper cover to open or close through the transmission device; detecting whether the door control and door lock execution actions are in place or not; the door control and door lock signal detection module adopts a proximity switch sensor and a signal conditioning circuit to realize level signal output; when the door is opened, the proximity switch sensor outputs a low level, and when the door is closed, the proximity switch sensor outputs a high level; when the lock is closed, outputting a high level, and when the lock is opened, outputting a low level; and judging the door control and door lock states according to the level.
The current acquisition module is used for balance detection of the centrifugal rotor, whether the centrifugal rotor is balanced or not is judged through working current, the working current is constant within an interval range, the working current is 36V/2.5 ∓ 0.5.5A for a centrifugal rotor with 12 holes and 20ml at 4000rpm, and the normal working current is 36V/2.5 8978.5A, when the unbalance phenomenon occurs, the rotating current exceeds 3A and can be lower than 2A; therefore, the phenomenon of unbalance of the motor is judged through the change of the working current, and whether the centrifugal rotor is locked up is judged through the starting current.
The refrigeration module is used for refrigerating the centrifugal cavity.
The temperature acquisition module detects the temperature of the centrifugal cavity and controls the refrigeration module to work.
The balance detection module detects the state of the N/S pole of the magnetic sheet fixed at the installation part of the centrifugal motor through the HALL, if the centrifugal rotor is not eccentric, the HALL signal is detected to be high level, if the centrifugal rotor has an eccentric phenomenon, the installation part of the motor is driven to move, the detected HALL signal is changed to be low level, and whether the centrifugal rotor has an unbalanced phenomenon or not is judged through the change of the HALL signal.
The main communication module is used for data communication between the centrifuge body and the cloud platform.
The microcontroller is a main control unit of the whole centrifuge, control program software is stored, a timer in the microcontroller realizes a timing function, the counting of the centrifugation time of the centrifugation sample is realized, and whether the centrifugation sample is taken out or not is judged according to the centrifugation completion time; the microcontroller performs data interaction with the RFID card reader through a serial bus and is used for identifying personnel and the model of the centrifugal rotor; the microcontroller identifies high and low level signals input/output by the gate control and door lock signal detection module through the I/O port; the microcontroller identifies the current and temperature values corresponding to the current acquisition module and the temperature acquisition module through the analog quantity interface; the microcontroller controls the working voltage of the refrigeration module through the I/O port and controls and outputs the working voltage of the refrigeration module through a temperature acquisition value set PID algorithm; the microcontroller reads the level state output by the balance detection module through the I/O port to distinguish the balance state of the centrifugal rotor; the microcontroller is communicated with the main communication module through a serial port and actively transmits abnormal data to the cloud platform; the microcontroller is used for controlling the logic, integrating timing functions and orderly arranging the tasks to run.
Furthermore, the centrifuge body also comprises a centrifuge motor controller, a sound module and a standby communication module; the centrifugal motor controller, the sound module and the standby communication module are all connected with the microcontroller;
the centrifugal motor controller provides a hardware circuit for identifying the position of a motor rotor and a hardware circuit for providing the working voltage of a three-phase winding of the motor, and adopts an inductive HALL mode or an non-inductive mode (a voltage zero crossing point detection circuit or a three-phase current sampling circuit) to identify the position of the rotor; an inverter bridge circuit is realized through a pre-drive circuit and an MOS/IGBT mode, so that alternating current applied to a three-phase winding is realized, and a rotating magnetic field is further realized to push a motor rotor to rotate;
the sound module is used for generating an abnormal alarm prompt sound;
and the standby communication module is used for data communication between the centrifuge body and the cloud platform.
Further, the application client comprises a mobile phone APP and/or a PC client.
Further, the main communication module is a WIFI Bluetooth module.
Further, the active warning method for reporting the abnormal state of the centrifuge comprises the following steps:
s1: starting up the centrifuge and electrifying;
s2: detecting whether an operator correctly identifies identity information of the operator through an RFID card reader, if the identity information of the operator is inconsistent with the information of personnel pre-recorded by the system, outputting an abnormal alarm log of the centrifuge, sending the abnormal alarm log to a cloud platform, and if not, entering the next step;
the information input of the operators is realized through the RFID sensing technology, the initial operators are factory engineers, the users need to input the information of the operators in advance, and due to the fact that the operators are more than one, if the operators forget the operation input work, the records can be carried out according to the information of the last operator.
S3: identifying the model of a centrifugal rotor placed by an operator through an RFID card reader, configuring a rotor list by a system, and corresponding to the maximum configurable rotating speed of the rotor, further limiting the configuration range of the operator in the input rotating speed, if the model of the centrifugal rotor is not identified, outputting an abnormal alarm log of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and if the model of the centrifugal rotor is not identified, entering the next step;
s4: detecting the starting current of the rotor through a current acquisition module, detecting the dynamic balance state of the centrifugal rotor or whether the centrifugal rotor is locked, judging whether the centrifugal rotor is balanced or not through a current method, outputting an abnormal alarm log of the centrifugal machine if the balance current or the locked starting current is larger than the working current of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not larger than the working current of the centrifugal machine;
checking the working current of the centrifugal rotor, namely detecting the balance of the centrifugal rotor, judging whether the centrifugal rotor has an unbalance phenomenon or not by a current method, and if the centrifugal rotor has the unbalance, judging that the working current or starting current exceeds the normal working current range; aiming at the working current, if the current change is normal in a controllable range, if the current change is obvious, the fault is judged (the centrifugal rotor with an 12 hole of 4000rpm and a 20ml hole has a normal working current of 36V/2.5 ∓ 0.5.5A, and when the working current is 50 percent higher than the normal working current, the fault is judged); and secondly, detecting locked rotor, namely judging whether the centrifugal rotor is locked by the starting current, wherein different centrifugal rotors need to rotate within a set time (the centrifugal rotor with a hole of 20ml at 4000rpm12 needs to rotate within 3 seconds) and judging that the centrifugal rotor has a fault if the starting current within 3 seconds is obviously abnormal (the starting current of the centrifugal rotor with a hole of 20ml at 4000rpm12 exceeds the normal working current by 100%).
S5: the door control and lock signal detection module is used for accurately detecting whether door control and lock execution actions are in place or not, if the door is not closed, the centrifugal machine is started, abnormal alarm logs of the centrifugal machine are output, the abnormal alarm logs are sent to the cloud platform, and if not, the next step is carried out;
when the rotor runs at high speed, the door must be closed; firstly, if the centrifugal machine is not closed, the air static pressure in the inner cavity is changed, so that the working current of the centrifugal machine is increased, the centrifugal machine always works in a critical state of the maximum power, the time is long, and the power supply of the centrifugal machine fails; secondly, the rotor runs at a high speed, the rotor is fixed by screws, and if the screws fail, the high-speed rotor flies out, so that potential safety hazards are easy to occur.
S6: detecting whether a centrifugal rotor is in a rotating state when a centrifugal machine door is opened, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is rotated, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not sent to the cloud platform;
in the centrifuge working process, sometimes an operator directly opens the door cover of the centrifuge under the condition that the centrifuge does not stop running, the action is in an unconventional operation mode, the centrifuge can perform brake operation, and the centrifugal rotor turntable is a high-speed rotating body and directly opens the door cover, so that the airflow is suddenly changed instantly, large current is easily caused to appear, and then the centrifuge motor controller can be burnt.
S7: identifying whether the centrifugal rotor is in an unbalanced state or not through two input factors, namely HALL signal acquisition and motor working current, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is in the unbalanced state, sending the abnormal alarm log to a cloud platform, and entering the next step or not;
deposit the sample of testing on the centrifugal rotor, if the staff's operation is improper, lead to whole centrifugal rotor not trim, the rotor will appear unbalanced when rotatory, or because deposit the container of detecting the sample and lead to damaging and then lead to the unbalanced phenomenon of centrifugal rotor owing to high-speed operation.
S8: detecting the temperature of a centrifugal cavity through a temperature acquisition module, outputting an abnormal alarm log of the centrifugal machine when the temperature of the cavity exceeds a preset temperature threshold value of the system, sending the abnormal alarm log to a cloud platform, and if not, entering the next step;
the centrifugal cavity has a controllable temperature range, and if the cavity temperature is not within the preset temperature range of the system (for example, the cavity temperature is required to be controlled between-10 ℃ to 10 ℃) after the cooling module works for 10 minutes, the cooling system may have a fault, the refrigerating capacity is abnormal, or the motor has a fault, and the heating value is too large.
S9: counting at fixed time by a timer in the microcontroller, outputting an abnormal alarm log of the centrifuge when the centrifuge sample does not leave the centrifuge cavity within the preset time of the system after being processed, sending the abnormal alarm log to the cloud platform, and jumping to S2 if the centrifuge sample does not enter the next detection period.
When the centrifuge finishes processing the sample, a timer is arranged in the microcontroller, the timer can set the waiting time for finishing centrifugation, the unit is minutes, the maximum value is 255, when the timer is cleared, the user does not take away the centrifuged sample in time, the centrifuge sends an alarm to remind an operator, and meanwhile, an abnormal alarm log of the centrifuge is output.
Further, the centrifuge abnormality alarm log outputs corresponding abnormality alarm logs according to steps S2-S9, where the types of the abnormality alarm logs are totally 8, and are respectively: the method comprises the following steps of RFID operator information input abnormity, RFID centrifugal rotor model abnormity, rotor starting current abnormity, door closing signal abnormity, door opening centrifugal rotor non-stop, centrifugal rotor balance signal abnormity, centrifugal cavity temperature abnormity and centrifugal sample non-extraction.
The invention has the beneficial effects that:
1. personnel identification and rotor identification functions are carried out through the RFID technology, so that the problem of non-professional operation is effectively solved.
2. And (4) reporting corresponding events are formed according to various abnormal conditions of the centrifugal machine, and an operator is reminded of operating standardization.
3. Through the application of the terminal software, data query statistics is realized, and the operation personnel and the equipment condition and the management personnel can conveniently know the working state of the operation personnel.
Drawings
Fig. 1 is a structural diagram of an active reporting centrifuge abnormal state early warning system;
fig. 2 is a flowchart of an active warning method for reporting abnormal states of a centrifuge.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, this embodiment provides an active warning system for reporting abnormal state of a centrifuge, which includes a centrifuge body, a cloud platform, and an application client, where the centrifuge body sends abnormal state data of the centrifuge to the cloud platform through a wireless network; the cloud platform is provided with a database for storing abnormal state data of the centrifuge and is also provided with a background application program of an application client; the application client calls a background application program of the cloud platform through an API (application programming interface) technology, and the application client and the cloud platform transmit data through a wireless network; the application client is used for counting and inquiring abnormal state data of the centrifuge body.
The invention adopts a micro-control chip as CKS32F103C8T6, a WIFI Bluetooth module FSC-BW236 as a main communication module, KilowayKX2005 as an RFID card reader, NTCLP100E3103H as a temperature acquisition module, LD3320 as a sound module and RS485 as a standby communication module.
The invention adopts a communication flying cloud server CVM as a cloud platform.
The microcontroller is a main control unit of the whole centrifuge, stores control program software, and meanwhile, an internal timer of the microcontroller realizes a timing function, so that the counting of the centrifugation time of the centrifugal sample is realized, and whether the centrifugal sample is taken out or not is judged according to the centrifugation completion time; the microcontroller performs data interaction with the RFID card reader through a serial bus and is used for identifying personnel and the model of the centrifugal rotor; the microcontroller identifies high and low level signals input/output by the gate control and door lock signal detection module through the I/O port; the microcontroller identifies the current and temperature values corresponding to the current acquisition module and the temperature acquisition module through the analog quantity interface; the microcontroller controls the working voltage of the refrigeration module through the I/O port and controls and outputs the working voltage of the refrigeration module through a temperature acquisition value set PID algorithm; the microcontroller reads the level state output by the balance detection module through the I/O port to distinguish the balance state of the centrifugal rotor; the microcontroller is communicated with the main communication module through a serial port and transmits data to the cloud platform; the microcontroller is used for controlling the logic, integrating timing functions and orderly arranging the tasks to run.
The RFID card reader is used for identifying identity information of an operator and acquiring the model of the centrifugal rotor so as to determine the corresponding work starting current and the maximum allowable work rotating speed of the centrifugal rotor.
The door control and door lock signal detection module controls the transmission device through the driving circuit, drives the door lock to work, and drives the upper cover to open or close through the transmission device; detecting whether the door control and door lock execution actions are in place or not; a proximity switch sensor and a signal conditioning circuit are adopted to realize level signal output; when the door is opened, the proximity switch sensor outputs a low level, and when the door is closed, the proximity switch sensor outputs a high level; when the lock is closed, outputting a high level, and when the lock is opened, outputting a low level; and judging the door control and door lock states according to the level.
The current acquisition module is used for detecting the balance of the centrifugal rotor, judge whether the centrifugal rotor is balanced through the operating current, normal centrifugation state, the operating current is invariable within an interval scope, for example, the centrifugal rotor of 4000rpm12 hole 20ml, the normal operating current is 36V/2.5 ∓ 0.5.5A, when the unbalance phenomenon appears, the pivoted electric current can exceed 3A, also can be less than 2A, therefore, judge that the unbalance phenomenon appears in the motor through the change of operating current, judge whether the centrifugal rotor is locked up by the turn through the pick-up current.
The refrigeration module is used for refrigerating the centrifugal cavity.
The temperature acquisition module detects the temperature of the centrifugal cavity and controls the refrigeration module to work.
The balance detection module detects the state of the N/S pole of the magnetic sheet fixed at the installation part of the centrifugal motor through the HALL, if the centrifugal rotor is not eccentric, the HALL signal is detected to be high level, if the centrifugal rotor has an eccentric phenomenon, the installation part of the motor is driven to move, the detected HALL signal is changed to be low level, and whether the centrifugal rotor has an unbalanced phenomenon or not is judged through the change of the HALL signal.
The main communication module is used for data communication between the centrifuge body and the cloud platform.
The centrifuge body also comprises a centrifuge motor controller, a sound module and a standby communication module; the centrifugal motor controller, the sound module and the standby communication module are all connected with the microcontroller;
the centrifugal motor controller provides a hardware circuit for identifying the position of a motor rotor and a hardware circuit for providing the working voltage of a three-phase winding of the motor, and adopts an inductive HALL mode or an non-inductive mode (a voltage zero crossing point detection circuit or a three-phase current sampling circuit) to identify the position of the rotor; an inverter bridge circuit is realized through a pre-drive circuit and an MOS/IGBT mode, and finally, alternating current applied to a three-phase winding is realized so as to realize that a rotating magnetic field pushes a motor rotor to rotate;
the sound module is used for generating an abnormal alarm prompt sound;
and the standby communication module is used for data communication between the centrifuge body and the cloud platform.
As shown in fig. 2, this embodiment provides an active warning method for reporting an abnormal state of a centrifuge, which includes the following steps:
s1: starting up the centrifuge and electrifying;
s2: detecting whether an operator correctly identifies identity information of the operator through an RFID card reader, if the input information of the operator is inconsistent with the information of the operator pre-recorded by the system, outputting an abnormal alarm log of the centrifuge, sending the abnormal alarm log to a cloud platform, and if not, entering the next step;
the information input of the operators is realized through the RFID sensing technology, the initial operators are factory engineers, and the users need to input the information of the operators in advance, so that the operators can record the information of the operators according to the previous information if the operators forget the operation input work.
S3: identifying the model of a centrifugal rotor placed by an operator through an RFID card reader, configuring a rotor list by a system, and corresponding to the maximum configurable rotating speed of the rotor, further limiting the configuration range of the operator in the input rotating speed, if the model of the centrifugal rotor is not identified, outputting an abnormal alarm log of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and if the model of the centrifugal rotor is not identified, entering the next step;
s4: detecting the starting current of the rotor through a current acquisition module, detecting the dynamic balance state of the centrifugal rotor or whether the centrifugal rotor is locked, judging whether the centrifugal rotor is balanced or not through a current method, outputting an abnormal alarm log of the centrifugal machine if the balance current or the locked starting current is larger than the working current of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not larger than the working current of the centrifugal machine;
checking the working current of the centrifugal rotor, namely detecting the balance of the centrifugal rotor, and judging whether the centrifugal rotor has an unbalance phenomenon or not by a current method, wherein if the centrifugal rotor is unbalanced, the working current or the starting current exceeds a normal working current within a certain range, aiming at the working current, if the current change is normal within a controllable range, and if the current change which is abnormal and obvious is judged to be a fault (for example, the centrifugal rotor with 12 holes of 4000rpm, the normal working current is 36V/2.5 ∓ 0.5.5A, and if the working current is 50 percent higher than the normal working current, the fault is judged); and secondly, detecting locked rotor, namely judging whether the centrifugal rotor is locked by the starting current, wherein different centrifugal rotors need to rotate within a set time (for example, a centrifugal rotor with 4000rpm12 holes and 20ml needs to rotate within 3 seconds), and judging that the centrifugal rotor is in fault if the starting current within 3 seconds is obviously abnormal (for example, the starting current of the centrifugal rotor with 4000rpm12 holes and 20ml is more than 100% of the normal working current).
S5: the door control and door lock signal detection module accurately detects whether door control and door lock execution actions are in place, if the door is not closed, the centrifugal machine is started, an abnormal alarm log of the centrifugal machine is output, the abnormal alarm log is sent to the cloud platform, and if not, the next step is carried out;
the main purpose is that when the rotor runs at high speed, the door must be closed; firstly, if the centrifugal machine is not closed, the air static pressure in the inner cavity is changed, so that the working current of the centrifugal machine is increased, the centrifugal machine always works in a critical state of the maximum power, the time is long, and the power supply of the centrifugal machine fails; secondly, the rotor runs at a high speed, the rotor is fixed by screws, and if the screws fail, the high-speed rotor flies out, so that potential safety hazards are easy to occur.
S6: detecting whether a centrifugal rotor is in a rotating state when a centrifugal machine door is opened, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is rotated, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not sent to the cloud platform;
in the centrifuge working process, sometimes an operator directly opens the door cover of the centrifuge under the condition that the centrifuge does not stop running, the action is in an unconventional operation mode, the centrifuge can perform brake operation, and the centrifugal rotor turntable is a high-speed rotating body and directly opens the door cover, so that the airflow is suddenly changed instantly, large current is easily caused to appear, and then the centrifuge motor controller can be burnt.
S7: identifying whether the centrifugal rotor is in an unbalanced state or not through two input factors, namely HALL signal acquisition and motor working current, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is in the unbalanced state, sending the abnormal alarm log to a cloud platform, and if the centrifugal rotor is not in the unbalanced state, entering the next step;
deposit the sample of testing on the centrifugal rotor, if the staff's operation is improper, lead to whole centrifugal rotor not trim, the rotor will appear unbalanced when rotatory, or because deposit the container of detecting the sample and lead to damaging and then lead to the unbalanced phenomenon of centrifugal rotor owing to high-speed operation.
S8: detecting the temperature of the centrifugal cavity through a temperature acquisition module, outputting an abnormal alarm log of the centrifugal machine when the temperature of the cavity exceeds a preset temperature threshold value of a system, sending the abnormal alarm log to a cloud platform, and if not, entering the next step;
the centrifugal cavity has a controllable temperature range, and if the cavity temperature is not within the preset temperature range of the system (for example, the cavity temperature is required to be controlled between-10 ℃ to 10 ℃) after the cooling module works for 10 minutes, the cooling system may have a fault, the refrigerating capacity is abnormal, or the motor has a fault, and the heating value is too large.
S9: counting at fixed time by a timer in the microcontroller, outputting an abnormal alarm log of the centrifuge when the centrifuge sample does not leave the centrifuge cavity within the preset time of the system after being processed, sending the abnormal alarm log to the cloud platform, and jumping to S2 if the centrifuge sample does not enter the next detection period.
After the centrifuge finishes processing the sample, a timer is arranged in the microcontroller, the timer can set the waiting time for the completion of centrifugation, the unit is minutes, the maximum value is 255, when the timer is reset, the user does not take away the centrifuged sample in time, the centrifuge sends an alarm to remind an operator, and meanwhile, an abnormal alarm log of the centrifuge is output.
In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. An active warning system for reporting abnormal state of a centrifuge is characterized in that: the system comprises a centrifuge body, a cloud platform and an application client, wherein the centrifuge body actively sends abnormal state data of the centrifuge to the cloud platform through a network; the cloud platform is provided with a database and a background application program and is used for storing abnormal state data of the centrifugal machine; the application client performs data interaction with the background application program and the database through an API (application programming interface) technology, is used for counting and inquiring abnormal state data of the centrifuge body, and transmits data with the cloud platform through a wireless network;
the centrifuge body includes: the system comprises a microcontroller, and an RFID card reader, a door control and door lock signal detection module, a current acquisition module, a temperature acquisition module, a refrigeration module, a balance detection module and a main communication module which are in control connection with the microcontroller;
the RFID card reader is used for identifying identity information of an operator and acquiring the model of the centrifugal rotor;
the door control and door lock signal detection module drives the door lock to be in different working states through the transmission device driving circuit;
the current acquisition module judges the balance and locked rotor of the centrifugal rotor by monitoring the working current and the starting current;
the refrigeration module is used for refrigerating the centrifugal cavity;
the temperature acquisition module detects the temperature of the centrifugal cavity and controls the refrigeration module to work;
the balance detection module detects the N/S pole state of the magnetic sheet fixed at the installation part of the centrifugal motor through an HALL signal to judge the balance of the centrifugal rotor;
the main communication module is used for data communication between the centrifuge body and the cloud platform;
the timer in the microcontroller is used for counting the centrifugal time of the centrifugal sample and judging the state of the centrifugal sample; performing data interaction with the RFID card reader; identifying the level signal of the door control and door lock signal detection module; identifying the current and temperature values of the current collection module and the temperature collection module; controlling the working voltage of the refrigeration module; reading the level state output by the balance detection module; performing data interaction with the main communication module;
the method for actively reporting the abnormal state early warning system of the centrifuge comprises the following steps:
s1: starting up a centrifuge and powering on;
s2: detecting whether the identity information of the operator is correctly identified by the operator through the RFID card reader, if the identity information of the operator is inconsistent with the personnel information prerecorded by the system, outputting an abnormal alarm log of the centrifuge, sending the abnormal alarm log to the cloud platform, and if not, entering the next step;
s3: identifying the model of a centrifugal rotor placed by an operator through the RFID card reader, configuring a rotor list by a system, and corresponding to the maximum configurable rotating speed of the rotor, further limiting the configuration range of the operator in the input rotating speed, if the model of the centrifugal rotor is not identified, outputting an abnormal alarm log of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and if the model of the centrifugal rotor is not identified, entering the next step;
s4: detecting the starting current of the rotor through the current acquisition module, detecting the dynamic balance state of the centrifugal rotor or whether the centrifugal rotor is locked, judging whether the centrifugal rotor is balanced through a current method, outputting an abnormal alarm log of the centrifugal machine if the balance current or the locked starting current is larger than the working current of the centrifugal machine, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not larger than the working current of the centrifugal machine;
the working current of the centrifugal rotor is checked, firstly, the balance of the centrifugal rotor is detected, whether the centrifugal rotor has unbalance is judged by a current method, because if the centrifugal rotor is unbalanced, the working current or the starting current exceeds the normal working current within a certain range, aiming at the working current, if the current change is normal within a controllable range, if the abnormal and obvious current change occurs, the current change is judged to be a fault, and if the working current exceeds the normal working current by 50 percent, the current change is judged to be the fault; secondly, detecting locked rotor, namely judging whether the centrifugal rotor is locked by the starting current, wherein different centrifugal rotors need to rotate within a set time, and judging the centrifugal rotor to be in fault if the starting current is obviously abnormal within 3 seconds;
s5: the door control and door lock signal detection module accurately detects whether door control and door lock execution actions are in place, if the door is not closed, the centrifugal machine is started, an abnormal alarm log of the centrifugal machine is output, the abnormal alarm log is sent to the cloud platform, and if not, the next step is carried out;
s6: detecting whether a centrifugal rotor is in a rotating state when a centrifugal machine door is opened, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is rotated, sending the abnormal alarm log to a cloud platform, and entering the next step if the abnormal alarm log is not transmitted;
s7: identifying whether the centrifugal rotor is in an unbalanced state or not through two input factors, namely HALL signal acquisition and motor working current, outputting an abnormal alarm log of the centrifugal machine if the centrifugal rotor is in the unbalanced state, sending the abnormal alarm log to a cloud platform, and entering the next step if the centrifugal rotor is not in the unbalanced state;
s8: detecting the temperature of the centrifugal cavity through a temperature acquisition module, outputting an abnormal alarm log of the centrifugal machine when the temperature of the cavity exceeds a preset temperature threshold value of a system, sending the abnormal alarm log to a cloud platform, and if not, entering the next step;
s9: counting at fixed time by the timer in the microcontroller, outputting an abnormal alarm log of the centrifuge when the centrifuge sample does not leave the centrifuge cavity within the preset time of the system after being processed, sending the abnormal alarm log to the cloud platform, and jumping to S2 if the centrifuge sample does not enter the next detection period.
2. The active reporting centrifuge abnormal state early warning system of claim 1, characterized in that: the centrifuge body also comprises a centrifuge motor controller, a sound module and a standby communication module which are connected with the microcontroller;
the centrifugal motor controller provides a hardware circuit for identifying the position of a motor rotor and a hardware circuit for providing working voltage of a three-phase winding of the motor;
the sound module is used for generating an abnormal alarm prompt sound;
the standby communication module is used for data communication between the centrifuge body and the cloud platform.
3. The active reporting centrifuge abnormal state early warning system of claim 2, wherein: the hardware circuit for identifying the position of the motor rotor identifies the position of the rotor in an inductive HALL mode or an noninductive mode; the hardware circuit of the working voltage of the three-phase winding of the motor realizes an inverter bridge circuit through a pre-drive circuit and an MOS/IGBT mode, and realizes the alternating current applied to the three-phase winding so as to realize that a rotating magnetic field pushes a motor rotor to rotate.
4. The active reporting centrifuge abnormal state early warning system of claim 1, wherein: the application client comprises a mobile phone APP and/or a PC client.
5. The active reporting centrifuge abnormal state early warning system of claim 1, characterized in that: the main communication module is a WIFI Bluetooth module.
6. The active reporting centrifuge abnormal state early warning system of claim 1, characterized in that: the centrifuge abnormality warning log outputs 8 types of abnormality warning logs according to steps S2-S9.
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