CN102921567A - Protection method and protection equipment for centrifugal machine - Google Patents
Protection method and protection equipment for centrifugal machine Download PDFInfo
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Abstract
The invention discloses a protection method and protection equipment for a centrifugal machine. The method is characterized in that a photoelectric sensor is adopted to detect the degree of unbalance of the rotating shaft of the centrifugal machine and an alarm is given on the condition that the degree of unbalance is greater than or equal to a preset first threshold. Through the method and the equipment disclosed by the invention, the problem that the degree of unbalance of the centrifugal machine is detected by triggering a mechanical position switch in correlation techniques is solved, the detection precision is improved, and a technical support is provided for whole-process protection of the centrifugal machine in a working state.
Description
Technical field
The present invention relates to control field, relate in particular to a kind of guard method and equipment of centrifuge.
Background technology
Centrifuge is a kind ofly can produce rotation, make the object that is rotated since centrifugal force be used as subsiding movement, thereby utilize the difference of different material settling velocity in centrifugal force field, realize the instrument and equipment of sample separation.The fields such as the dried biological cell separation of extensive use, pharmacy, medical science, petrochemical industry, agricultural, food hygiene, nuclear fuel material purification.The rotating speed of supercentrifuge is all more than 10000 rev/mins, usually rotating speed greater than the ultracentrifuge that calls more than 30000 rev/mins.Along with rotating speed is faster, centrifugal force is larger, and the effect of sample separation is better; Particularly in fields such as biomedical engineering, bio-pharmaceuticals, ultracentrifuge is must obligato laboratory apparatus and production equipment.At present, advanced person's ultracentrifuge turns 150000 rev/mins of scooters in the world.
The rotation of centrifuge rotor is to be driven by motor by control circuit by microprocessor.Connected mode is that motor passes through the bearing connection rotating shaft, and rotating shaft connects rotor.After speed was very high,, rotating shaft problem excessive if there is rotor problem, tube breaking and sample or drive motors problem all may cause the running of rotor uneven.The imbalance of rotor detects most important, and the imbalance of rotor can cause rotating shaft to produce swing, affects the centrifuge life-span, and when serious, the rotating shaft that can fracture, even fried head cause fatal crass's security incident.
At present, the imbalance detection of centrifuge is to detect imbalance by the swinging distance that detects rotating shaft, what adopt is the physical detection mode, also namely rely on mechanical location imbalance identification system, there is the mechanical location switch in this system, when rotating shaft has the larger amplitude of oscillation, can touch the mechanical location switch, will find the imbalance of rotor this moment.But owing to being to adopt the mode of Crush trigger position switch to detect, initial stage appears in imbalance, mechanical switch can't detect, thereby can not when just producing, fault in time find, when finding imbalance, unbalanced problem is usually more serious, even serious accident may appear in this moment.
For the mode that adopts the Crush trigger position switch in the correlation technique degree of unbalancedness of centrifuge is detected the problem that causes, not yet propose at present effective solution.
Summary of the invention
Main purpose of the present invention provides a kind of guard method and equipment of centrifuge, to solve at least in the correlation technique mode that adopts the Crush trigger position switch degree of unbalancedness of centrifuge is detected the problem that is caused.
According to an aspect of the present invention, provide a kind of guard method of centrifuge, having comprised: the degree of unbalancedness that adopts the rotating shaft of photoelectric sensor monitoring centrifuge; In the situation of described degree of unbalancedness more than or equal to default first threshold, report to the police.
Preferably, adopt the degree of unbalancedness of photoelectric sensor monitoring centrifuge rotating shaft to comprise: to adopt the photoelectricity amplitude sensor to monitor the degree of unbalancedness of described centrifuge rotating shaft.
Preferably, the degree of unbalancedness that adopts the photoelectricity amplitude sensor to monitor described centrifuge rotating shaft comprises: adopt the photoelectricity amplitude sensor to monitor described centrifuge rotating shaft amplitude in different directions; Difference according to the amplitude on the described different directions obtains described degree of unbalancedness.
Preferably, in the situation that after described degree of unbalancedness reports to the police more than or equal to preset first threshold value, also comprise: in the situation of described degree of unbalancedness more than or equal to default Second Threshold, control the decelerating through motor of described centrifuge and/or stop the running of described motor.
Preferably, described Second Threshold is determined one of at least according to following factor: the rotor weight of described centrifuge, the weight of separated reagent, the operation phase of described centrifuge.
Preferably, described Second Threshold is greater than described first threshold.
Preferably, described first threshold is determined one of at least according to following factor: the rotor weight of described centrifuge, the weight of separated reagent, the operation phase of described centrifuge.
Preferably, the guard method of described centrifuge is applied to ultracentrifuge.
According to a further aspect in the invention, also provide a kind of protection equipment of centrifuge, having comprised: photoelectric sensor, for the degree of unbalancedness that gathers the centrifuge rotating shaft; Processor links to each other with described photoelectric sensor, is used for receiving described degree of unbalancedness, and in the situation of described degree of unbalancedness more than or equal to default first threshold, sends alarm command to alarm; Described alarm links to each other with described processor, is used for receiving the described alarm command from described processor, and reports to the police.
Preferably, described equipment also comprises: controller, link to each other with described processor, be used for receiving the control instruction that described processor sends in the situation of described degree of unbalancedness more than or equal to default Second Threshold, and control the decelerating through motor of described centrifuge and/or stop the running of described motor according to described control instruction.
Preferably, described photoelectric sensor is the photoelectricity amplitude sensor.
Preferably, described photoelectricity amplitude sensor is used for monitoring described centrifuge rotating shaft amplitude in different directions, and wherein, the difference of the amplitude on the described different directions is used for obtaining described degree of unbalancedness.
Preferably, described photoelectric sensor also is used for gathering the degree of unbalancedness of ultracentrifuge rotating shaft.
Preferably, described equipment also comprises: display, link to each other with described processor, be used for receiving described processor in the situation that the idsplay order that described degree of unbalancedness sends more than or equal to described first threshold, and show described degree of unbalancedness according to described idsplay order.
According to technical scheme of the present invention, adopt the degree of unbalancedness of photoelectric sensor monitoring centrifuge rotating shaft; In the situation of degree of unbalancedness more than or equal to default first threshold; the mode of reporting to the police; solved the mode that adopts the Crush trigger position switch in the correlation technique degree of unbalancedness of centrifuge has been detected the problem that causes; promoted accuracy of detection, for realizing providing technical support to the whole process protection under the centrifuge duty.
Description of drawings
Figure of description is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the guard method of the centrifuge of the embodiment of the invention;
Fig. 2 is the structured flowchart according to the protection equipment of the centrifuge of the embodiment of the invention;
Fig. 3 is the preferred structure block diagram one according to the protection equipment of the centrifuge of the embodiment of the invention;
Fig. 4 is the preferred structure block diagram two according to the protection equipment of the centrifuge of the embodiment of the invention;
Fig. 5 is the principle schematic of the according to the preferred embodiment of the invention uneven detection of ultracentrifuge and protection scheme;
Fig. 6 is the theory diagram of the according to the preferred embodiment of the invention uneven detection of ultracentrifuge and holding circuit.
The specific embodiment
Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
A kind of guard method of centrifuge is provided in the present embodiment, and Fig. 1 is the flow chart according to the guard method of the centrifuge of the embodiment of the invention, and as shown in Figure 1, the method comprises the steps:
Step S102 adopts photoelectric sensor to monitor the degree of unbalancedness of centrifuge rotating shaft;
Step S104 in the situation of degree of unbalancedness more than or equal to default first threshold, reports to the police.
The present embodiment passes through above-mentioned steps; adopt the degree of unbalancedness of photoelectric sensor monitoring centrifuge rotating shaft; and in the situation that degree of unbalancedness report to the police more than or equal to first threshold; owing to being to adopt photoelectric sensor to detect; even the centrifuge rotating shaft has very little degree of unbalancedness; can both detect; accuracy of detection is very high; and no matter which kind of situation centrifuge is operated under; all can detect; limit less to testing conditions; solved the mode that adopts the Crush trigger position switch in the correlation technique degree of unbalancedness of centrifuge has been detected the problem that causes; promoted accuracy of detection, for realizing providing technical support to the whole process protection under the centrifuge duty.
Because it is higher that ultracentrifuge is compared the generic centrifuge precision to degree of unbalancedness detection demand; therefore the guard method that provides of the present embodiment degree of unbalancedness that especially can be applied to ultracentrifuge detects, thereby promotes job security and the reliability of ultracentrifuge.
Preferably, can adopt the degree of unbalancedness of photoelectricity amplitude sensor monitoring centrifuge rotating shaft, this mode can directly get access to the acceleration of centrifuge rotating shaft, more easily is scaled the degree of unbalancedness of centrifuge rotating shaft, certainly, also can monitor by other photoelectric sensors.
Preferably, in the situation of the degree of unbalancedness that adopts the rotating shaft of photoelectricity amplitude sensor monitoring centrifuge, can be at first the acceleration of the centrifuge rotating shaft that gets access to be scaled centrifuge rotating shaft amplitude in different directions, thereby and then obtains degree of unbalancedness according to the difference of the amplitude on the different directions.
As a kind of preferred embodiment, if degree of unbalancedness more than or equal to default Second Threshold, also can be controlled the decelerating through motor of centrifuge and/or stop the running of motor.In this way, can automatically end the running of the unbalanced rotating shaft of centrifuge, avoid danger occurring, after fixing a breakdown, rerun.
When the mode that adopts the Crush trigger position switch detects, can not adjust the examination criteria of degree of unbalancedness according to the operation phase of whole centrifuge.For example, when being in boost phase, the rotor amplitude of oscillation of normal operation also may be larger, cause and mechanical switch generation physical contact, but this is normal phenomenon, caused not science of testing result.Therefore as a kind of preferred embodiment, above-mentioned Second Threshold can be determined according to the weight of the rotor weight of centrifuge, separated reagent and the factors such as operation phase of centrifuge.Because the difference along with operation phase of the weight of centrifuge rotor weight, separated reagent and centrifuge, the degree of unbalancedness threshold value that centrifuge can be accepted is not identical yet, therefore in this way, can be according to the weight of the weight of different centrifuge rotors, separated reagent and the dynamic and quantitative definite condition of automatically ending the running of the uneven rotating shaft of centrifuge of the factors such as operation phase of centrifuge, so that the centrifuge Operation safety is higher.
Preferably, can also will report to the police and the decelerating through motor of control centrifuge and/or the mode that stops the running of motor are combined with, for example, above-mentioned Second Threshold is set greater than first threshold, in this case, when the degree of unbalancedness of centrifuge satisfies in the situation of first threshold, can report to the police first, to notify the related personnel to know, and further improve when the degree of unbalancedness of centrifuge, satisfied in the situation of Second Threshold, then can automatically control the decelerating through motor of centrifuge and/or stop the running of motor, thereby wait for that the related personnel comes to fix a breakdown, avoid causing danger.
When the mode that adopts the Crush trigger position switch detects, larger in the boost phase rotor amplitude of oscillation, can with the mechanical switch physical contact, thereby can detect, but be normal phenomenon this moment.After entering operation, the initial stage appears in imbalance, and mechanical switch can't detect, and only has imbalance very seriously just can detect, but may serious accident occur this moment.Therefore as a kind of preferred embodiment, above-mentioned first threshold also can be determined according to the weight of the rotor weight of centrifuge, separated reagent and the factors such as operation phase of centrifuge.Because the difference along with operation phase of the weight of centrifuge rotor weight, separated reagent and centrifuge, the degree of unbalancedness threshold value that centrifuge can be accepted is not identical yet, therefore in this way, can according to the factors such as operation phase of the weight of the weight of different centrifuge rotors, separated reagent and centrifuge dynamic and quantitative determine the condition of reporting to the police, more hommization is set.
Corresponding to said method, a kind of protection equipment of centrifuge also is provided in the present embodiment, this equipment is used for realizing above-described embodiment and preferred embodiment, had carried out repeating no more of explanation.Although the described parts of following examples are preferably realized with software, hardware, perhaps the realization of the combination of software and hardware also may and be conceived.
Fig. 2 is the structured flowchart according to the protection equipment of the centrifuge of the embodiment of the invention, and as shown in Figure 2, this equipment comprises: photoelectric sensor 22, processor 24 and alarm 26.The below is elaborated to above-mentioned all parts.
Photoelectric sensor 22 is for the degree of unbalancedness that gathers the centrifuge rotating shaft; Processor 24 links to each other with photoelectric sensor 22, is used for receiving the degree of unbalancedness that photoelectric sensor 22 gathers, and in the situation of this degree of unbalancedness more than or equal to default first threshold, sends alarm command to alarm 26; Alarm 26 links to each other with processor 24, is used for receiving the alarm command of self processor 24, and reports to the police.
The present embodiment is by above-mentioned parts; adopt the degree of unbalancedness of photoelectric sensor 22 monitoring centrifuge rotating shafts; and in the situation that degree of unbalancedness reported to the police by alarm 26 more than or equal to first threshold; owing to being to adopt photoelectric sensor 22 to detect; even the centrifuge rotating shaft has very little degree of unbalancedness; can both detect; accuracy of detection is very high; and no matter which kind of situation centrifuge is operated under; all can detect; limit less to testing conditions; solved the mode that adopts the Crush trigger position switch in the correlation technique degree of unbalancedness of centrifuge has been detected the problem that causes; promoted accuracy of detection, for realizing providing technical support to the whole process protection under the centrifuge duty.
Fig. 3 is the preferred structure block diagram one according to the protection equipment of the centrifuge of the embodiment of the invention; as shown in Figure 3; this equipment can also comprise: controller 32; link to each other with processor 24; be used for the control instruction that receiving processor 24 sends in the situation of degree of unbalancedness more than or equal to default Second Threshold, and according to the decelerating through motor of this control instruction control centrifuge and/or stop the running of motor.
Preferably, photoelectric sensor 22 can be the photoelectricity amplitude sensor.Preferably, this photoelectricity amplitude sensor can be used for monitoring centrifuge rotating shaft amplitude in different directions, and wherein, the difference of the amplitude on the different directions is used for obtaining degree of unbalancedness.
Preferably, this equipment can also be used for ultracentrifuge is protected, and for example, can make photoelectric sensor 22 gather the degree of unbalancedness of ultracentrifuge rotating shaft.
Fig. 4 is the preferred structure block diagram two according to the protection equipment of the centrifuge of the embodiment of the invention; as shown in Figure 4; this equipment can also comprise: display 42; link to each other with processor 24; be used for receiving processor 24 degree of unbalancedness more than or equal to the situation of first threshold under the idsplay order that sends, and show degree of unbalancedness according to this idsplay order.
Be elaborated below in conjunction with the implementation procedure of preferred embodiments and drawings to above-described embodiment and preferred embodiment.
In following preferred embodiment; describe the imbalance of ultracentrifuge is detected as example; a kind of noncontact is provided; intelligence is uneven to be detected and protection scheme; adopt the photoelectricity amplitude sensor to be equipped with data processing software; the amplitude that sensor measurement is gone out is converted into degree of unbalancedness by data processing software; can be for the weight of the specific and separated reagent of each rotor; monitor in centrifugal overall process; the mechanical location imbalance identification system in the past of changing needs the swinging distance according to rotating shaft; and the shortcoming that only just can work at boost phase; make it in any speed; even running up; tube breaking and sample are excessive and the contents such as the unbalance response that causes and rotor stability also can detect, and realize the whole process protection to ultracentrifuge.
This protection scheme adopts photoelectricity amplitude sensor to be equipped with data processing software, can be for the detection of the amplitude of oscillation of the specified weight of each rotor and machine shaft, and learn the uneven degree of rotor by calculating, monitor in centrifugal overall process.Fig. 5 is the principle schematic of the according to the preferred embodiment of the invention uneven detection of ultracentrifuge and protection scheme; as shown in Figure 5; M among the figure represents centrifuge; the 52nd, rotor, the 54th, machine shaft, the 56th, motor; the 58th, the photoelectricity amplitude sensor; the 60th, signal conditioning circuit, the 62nd, microprocessor, the 64th, circuit for controlling motor.Fig. 6 is the theory diagram of the according to the preferred embodiment of the invention uneven detection of ultracentrifuge and holding circuit.
As shown in Figure 5, this preferred embodiment provides a kind of imbalance of ultracentrifuge to detect and protection system, and this system comprises photoelectricity amplitude sensor 58, signal conditioning circuit 60, microprocessor 62, circuit for controlling motor 64.As shown in Figure 6; its operation principle is to be detected the Oscillation Amplitude (amplitude) of machine shaft and output signal is delivered to signal conditioning circuit by the photoelectricity amplitude sensor; signal conditioning circuit is finished the filtering of amplitude signal; amplify; deliver to microprocessor after the shaping; microprocessor carries out analog-to-digital conversion with signal; and the process data processing software calculates degree of unbalancedness; surpass the threshold value of setting when degree of unbalancedness; microprocessor sends control signal on the one hand; allow motor slow down; until shut down; ultracentrifuge is protected; send on the other hand alarm signal and display, remind operating personnel to note, and enter corresponding workflow; ultracentrifuge is safeguarded and detected, find out failure cause.After failure cause is removed, but just rearming of ultracentrifuge.Wherein, the mode that is conversed degree of unbalancedness by the amplitude of machine shaft can draw degree of unbalancedness for the difference according to the amplitude of different directions, for example, can be with the difference maximum of the amplitude of different directions as degree of unbalancedness etc., these conversion modes are comparatively commonly used in the art, no longer do in this article and give unnecessary details.
By the scheme in this preferred embodiment, can access following beneficial effect:
(1) can detect in real time and protection unbalanced whole process in the whole ultracentrifuge running;
(2) can alarm threshold value be set according to the different situations of rotor; Make uneven detection sensitiveer reliable;
(3) can when fault just produces, in time find, protect to greatest extent machine;
(4) can be dynamic and quantitative detect degree of unbalancedness;
(5) system can self-locking, and before imbalance fault was removed, ultracentrifuge can not enter duty, avoids the expansion of fault, protection machine property safety and operating personnel's life safety.
In another embodiment, also provide a kind of software, this software be used for to be carried out the technical scheme that above-described embodiment and preferred embodiment are described.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to CD, floppy disk, hard disk, scratch pad memory etc.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the guard method of a centrifuge is characterized in that, comprising:
Adopt the degree of unbalancedness of photoelectric sensor monitoring centrifuge rotating shaft;
In the situation of described degree of unbalancedness more than or equal to default first threshold, report to the police.
2. method according to claim 1 is characterized in that, adopts the degree of unbalancedness of photoelectric sensor monitoring centrifuge rotating shaft to comprise:
Adopt the photoelectricity amplitude sensor to monitor the degree of unbalancedness of described centrifuge rotating shaft.
3. method according to claim 2 is characterized in that, the degree of unbalancedness that adopts the photoelectricity amplitude sensor to monitor described centrifuge rotating shaft comprises:
Adopt the photoelectricity amplitude sensor to monitor described centrifuge rotating shaft amplitude in different directions;
Difference according to the amplitude on the described different directions obtains described degree of unbalancedness.
4. each described method in 3 according to claim 1 is characterized in that, in the situation that after described degree of unbalancedness reports to the police more than or equal to preset first threshold value, also comprise:
In the situation of described degree of unbalancedness more than or equal to default Second Threshold, control the decelerating through motor of described centrifuge and/or stop the running of described motor.
5. method according to claim 4 is characterized in that, described Second Threshold is determined one of at least according to following factor: the rotor weight of described centrifuge, the weight of separated reagent, the operation phase of described centrifuge.
6. method according to claim 4 is characterized in that, described Second Threshold is greater than described first threshold.
7. each described method in 3 according to claim 1 is characterized in that, described first threshold is determined one of at least according to following factor: the rotor weight of described centrifuge, the weight of separated reagent, the operation phase of described centrifuge.
8. each described method in 3 according to claim 1 is characterized in that, the guard method of described centrifuge is applied to ultracentrifuge.
9. the protection equipment of a centrifuge is characterized in that, comprising:
Photoelectric sensor is for the degree of unbalancedness that gathers the centrifuge rotating shaft;
Processor links to each other with described photoelectric sensor, is used for receiving described degree of unbalancedness, and in the situation of described degree of unbalancedness more than or equal to default first threshold, sends alarm command to alarm;
Described alarm links to each other with described processor, is used for receiving the described alarm command from described processor, and reports to the police.
10. equipment according to claim 9 is characterized in that, described equipment also comprises:
Controller, link to each other with described processor, be used for receiving the control instruction that described processor sends in the situation of described degree of unbalancedness more than or equal to default Second Threshold, and control the decelerating through motor of described centrifuge and/or stop the running of described motor according to described control instruction.
11. equipment according to claim 9 is characterized in that, described photoelectric sensor is the photoelectricity amplitude sensor.
12. equipment according to claim 11 is characterized in that, described photoelectricity amplitude sensor is used for monitoring described centrifuge rotating shaft amplitude in different directions, and wherein, the difference of the amplitude on the described different directions is used for obtaining described degree of unbalancedness.
13. each described equipment in 12 is characterized in that according to claim 9, described photoelectric sensor also is used for gathering the degree of unbalancedness of ultracentrifuge rotating shaft.
14. each described equipment in 12 is characterized in that according to claim 9, described equipment also comprises:
Display links to each other with described processor, is used for receiving described processor in the situation that the idsplay order that described degree of unbalancedness sends more than or equal to described first threshold, and shows described degree of unbalancedness according to described idsplay order.
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| CN103217293A (en) * | 2013-04-08 | 2013-07-24 | 浙江大学 | Casing tolerance test data acquisition trigger system based on vibration value |
| CN105521876A (en) * | 2016-01-15 | 2016-04-27 | 上海戴宝机械设备有限公司 | Tubular centrifuge and method thereof for keeping balance of rotating drum |
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| CN103217293B (en) * | 2013-04-08 | 2015-09-02 | 浙江大学 | Based on the casing containment test data acquisition triggering system of vibration values |
| CN105521876A (en) * | 2016-01-15 | 2016-04-27 | 上海戴宝机械设备有限公司 | Tubular centrifuge and method thereof for keeping balance of rotating drum |
| CN106423589A (en) * | 2016-12-05 | 2017-02-22 | 无锡艾科瑞思产品设计与研究有限公司 | High-speed tubular centrifuge for online detecting centrifuging liquid turbidity |
| CN107728052A (en) * | 2017-10-31 | 2018-02-23 | 北京航天计量测试技术研究所 | A kind of automated testing method of acceleration switch threshold accuracy |
| CN107728052B (en) * | 2017-10-31 | 2020-01-07 | 北京航天计量测试技术研究所 | An automated test method for acceleration switch threshold accuracy |
| CN111629833A (en) * | 2018-01-25 | 2020-09-04 | 株式会社久保田制作所 | Centrifugal separator |
| CN109468804A (en) * | 2018-12-11 | 2019-03-15 | 佛山市顺德海尔电器有限公司 | Dewatering speed control method of washing equipment |
| CN109468804B (en) * | 2018-12-11 | 2022-12-06 | 佛山市顺德海尔电器有限公司 | Dewatering rotating speed control method of washing equipment |
| CN113967541A (en) * | 2021-09-16 | 2022-01-25 | 青岛海尔生物医疗科技有限公司 | Method and device for controlling a centrifuge, storage medium |
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