CN205066877U - Liquid level detection device and sample analytical equipment - Google Patents
Liquid level detection device and sample analytical equipment Download PDFInfo
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- CN205066877U CN205066877U CN201520728099.7U CN201520728099U CN205066877U CN 205066877 U CN205066877 U CN 205066877U CN 201520728099 U CN201520728099 U CN 201520728099U CN 205066877 U CN205066877 U CN 205066877U
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Abstract
The utility model provides a liquid level detection device and sample analytical equipment, even if via supply with the piping with the liquid supply of electrolyte to the condition of nozzle under, also can well carry out liquid level detection. The liquid level detection device has: the nozzle of tube -shape has electric conductivity for the first liquid of storing in the attraction storage portion, lifting unit makes the nozzle and goes up and down for the liquid level of the first liquid stored in the storage portion, the test section is because the change detection of electrostatic capacitance utilizes the front end of the nozzle of lifting unit lift whether to reach the liquid level of first liquid, supply with the piping, be connected with the nozzle with communicateing, attraction portion sets up in supplying with the piping, the front end of nozzle soak attract the nozzle with first liquid under the state in first liquid in, discharge portion sets up in supplying with the piping, will follow the second liquid of the electrolyte that liquid supply portion supplied with and circulate and discharge from the nozzle in the supply piping, and ground connection portion, set up in supplying with the piping, make the partly of supply piping and reference potential point electricity be connected.
Description
Technical field
The utility model relates to liquid level sensor and device for analyzing samples.
Background technology
In the past, using the nozzle of the electric conductivity that the liquor sample in container gathers to detect the technology of liquid level is known (such as, patent documentation 1).
Patent documentation 1: Japanese Unexamined Patent Publication 2007-064661 publication
But employ in the liquid level sensor of electric conductivity nozzle at patent documentation 1, when electrolytical cleaning fluid (such as, comprising the solution of sodion) is supplied to nozzle, because of different situations, the feed path of cleaning fluid plays a role as antenna.That is, this feed path becomes noise source, or the noise produced because of other equipment is received by this feed path.Consequently, produce can not Accurate Determining level detection time the such problem of the change of electrostatic capacitance, impedance variation.
Utility model content
So the purpose of this utility model is to provide a kind of liquid level sensor and device for analyzing samples, even if when electrolytical liquid is supplied to nozzle via supplying tubing, also level detection can be performed well.
In order to solve above-mentioned problem, in liquid level sensor of the present utility model, it is characterized in that, having: the nozzle of tubular, described nozzle has electric conductivity, for attracting the first liquid stored in reservoir; Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described first liquid stored in described reservoir; Test section, described test section is based on the change of electrostatic capacitance, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described first liquid; Supplying tubing, described supplying tubing is connected communicatively with described nozzle; Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described first liquid, is attracted to by described first liquid in described nozzle; Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical second liquid circulated in described supplying tubing discharge from described nozzle; And grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing that described second liquid is circulated is electrically connected with reference potential point.
In addition, be preferably, described grounding parts is the electric conductor of the part being arranged on described supplying tubing.
In addition, be preferably, when using the circulating direction of the described second liquid in described supplying tubing as benchmark, described suction unit is arranged on the downstream of described discharge portion.
In addition, be preferably, described grounding parts is arranged between described discharge portion and described liquid supply unit.
In addition, be preferably, described liquid supply unit is cleaning solution supply part cleaning fluid being supplied to described supplying tubing as described second liquid.
In addition, be preferably, described nozzle is that the sample that sample carries out attracting as described first liquid is attracted nozzle.
In addition, be preferably, described sample is urine.
In liquid level sensor of the present utility model, it is characterized in that, have: the nozzle of tubular, described nozzle has electric conductivity, for attracting the first liquid stored in reservoir; Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described first liquid stored in described reservoir; Test section, described test section is based on impedance variation, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described first liquid; Supplying tubing, described supplying tubing is connected communicatively with described nozzle; Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described first liquid, is attracted to by described first liquid in described nozzle; Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical second liquid circulated in described supplying tubing discharge from described nozzle; And grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing that described second liquid is circulated is electrically connected with reference potential point.
In device for analyzing samples of the present utility model, it is characterized in that, have: sample process unit, described sample process unit is for attracting sample; And inspection unit, described inspection unit measures the sample attracted by described sample process unit, and described sample process unit has: the nozzle of tubular, and described nozzle has electric conductivity, for attracting the sample stored in reservoir; Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described sample stored in described reservoir; Test section, described test section is based on the change of electrostatic capacitance, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described sample; Supplying tubing, described supplying tubing is connected communicatively with described nozzle; Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described sample, is attracted to by described sample in described nozzle; Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical liquid circulated in described supplying tubing discharge from described nozzle; And grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing of described liquid communication is electrically connected with reference potential point.
In addition, be preferably, described grounding parts is the electric conductor of the part being arranged on described supplying tubing.
In addition, be preferably, when using the circulating direction of the described liquid in described supplying tubing as benchmark, described suction unit is arranged on the downstream of described discharge portion.
In addition, be preferably, described grounding parts is arranged between described discharge portion and described liquid supply unit.
In addition, be preferably, also there is cleaning solution supply part cleaning fluid being supplied to described supplying tubing as described liquid.
In addition, be preferably, described reservoir is sample container, and described device for analyzing samples also has the supply unit described sample container being transported to and being carried out the sample attraction position attracted by described nozzle.
In addition, be preferably, described sample is urine.
In addition, be preferably, described inspection unit is configured to, and makes a video recording, carries out image procossing to acquired view data, thus check the composition in described urine to the test pad comprising the described urine of being discharged by described nozzle.
In device for analyzing samples of the present utility model, it is characterized in that, have: sample process unit, described sample process unit is for attracting sample; And inspection unit, described inspection unit measures the sample attracted by described sample process unit, and described sample process unit has: the nozzle of tubular, and described nozzle has electric conductivity, for attracting the sample stored in reservoir; Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described sample stored in described reservoir; Test section, described test section is based on impedance variation, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described sample; Supplying tubing, described supplying tubing is connected communicatively with described nozzle; Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described sample, is attracted to by described sample in described nozzle; Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical liquid circulated in described supplying tubing discharge from described nozzle; And grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing of described liquid communication is electrically connected with reference potential point.
According to liquid level sensor of the present utility model and device for analyzing samples, the level detection based on the change of electrostatic capacitance or the first liquid of impedance variation is performed with the state of the electrolytical second liquid ground connection circulated in supplying tubing.Thus, can prevent supplying tubing from becoming noise source and the noise that no longer can accurately detect because of this noise in the such problem of the change of electrostatic capacitance and liquid level sensor or the noise that produces because of other equipment are supplied to pipe arrangement receives such problem.
Therefore, even if when making electrolytical second liquid circulate in supplying tubing, whether the front end that also can perform nozzle well reaches the judgement of the liquid level of first liquid, can prevent the error detection of liquid level position.
Especially, reference potential point and grounding parts can easily be electrically connected.Therefore, the current potential of the second liquid circulated in supplying tubing can be easily made to be reference potential.
Accompanying drawing explanation
Fig. 1 is the stereographic map of an example of the outward appearance of the device for analyzing samples represented in embodiment of the present utility model.
Fig. 2 is the stereographic map of an example of the major part of the device for analyzing samples represented in embodiment of the present utility model.
Fig. 3 is the stereographic map of an example of the structure representing sample process unit.
Fig. 4 is the stereographic map of an example of the structure representing sample process unit.
Fig. 5 is the stereographic map of an example of the structure representing sample process unit.
Fig. 6 is the stereographic map of an example of the structure representing sample process unit.
Fig. 7 is the figure of an example of the matched tube structure representing device for analyzing samples.
Fig. 8 is the block diagram of an example of the structure representing control module.
Fig. 9 is the figure of the level detection principle for illustration of the change based on electrostatic capacitance.
Figure 10 is the figure of the level detection principle for illustration of the change based on electrostatic capacitance.
Description of reference numerals
1 device for analyzing samples (liquid level sensor)
5 centrifuge tubes (reservoir)
5a sample (first liquid)
10 sample process unit
11 nozzles
11a front end
15 lifting units
40 transfer units
49 share pipe
50 cleaning solution supply part (liquid supply unit)
51 pipe arrangements
54 extraction pumps (discharge portion)
56 suction pumps (suction unit)
57 grounding parts
70 inspection units
90 control modules
95 test sections
Embodiment
Below, embodiment of the present utility model is described in detail with reference to accompanying drawing.
<1. the structure > of device for analyzing samples
Fig. 1 is the stereographic map of an example of the outward appearance of the device for analyzing samples 1 represented in embodiment of the present utility model.At this, device for analyzing samples 1 carries out to the concentration of the material contained in the liquid samples such as urine (such as, glucose and protein etc.) and the proportion of sample the device that checks.As shown in Figure 1, before device for analyzing samples 1, supply unit 3 is provided with.In addition, display part 8 and emergency warning lamp 9 is mainly provided with at the framework 1a of device for analyzing samples 1.
In addition, in Fig. 1 and later each figure, in order to help to understand each textural element recorded in accompanying drawing, as required, suitably mark out Z-direction as vertical, using the XYZ orthogonal coordinate system of XY plane as surface level.
Supply unit 3 by one or more centrifuge tube 5 from the move-in position of transport platform 6, to be delivered to transport platform 6 via the collection position below sample process unit 10 take out of position.At this, each centrifuge tube 5 is reservoir of stored samples (first liquid).Centrifuge tube 5 is sample container.As shown in Figure 1, each centrifuge tube 5 is transferred to lean against the state that transport platform 6 erects.
Display part 8 is such as made up of liquid crystal display, have as can by with finger or special style of writing encounter the function that picture carrys out " touch-screen " of the position in assigned picture.Therefore, the user of device for analyzing samples 1 is (following, referred to as " user ") instruction of " touch-screen " function employing display part 8 is carried out based on the content shown by display part 8, thus the process that device for analyzing samples 1 can be made to put rules into practice (such as, starting the sample stored in analysis centrifugal pipe 5).Like this, display part 8 can be used as to accept the input part from the input action of user.
Emergency warning lamp 9 is informing portions of the operational situation for informing device for analyzing samples 1 to user, such as, formed by the such transparent body of propylene rod.As shown in Figure 1, emergency warning lamp 9 has: transparent main part 9a and by grinding etc. make surperficial opaque lighting portion 9b.Thus, when light is directed into emergency warning lamp 9 from the end of main part 9a, lighting portion 9b sends the light with the color of directed photophase.
Fig. 2 is the stereographic map of an example of the major part representing device for analyzing samples 1.As shown in Figure 2, device for analyzing samples 1 mainly has: sample process unit 10, transfer unit 40, inspection unit 70 and control module 90.
The sample attracted to from centrifuge tube 5 in nozzle 11 is discharged in desired position (such as, being positioned in each test pad 7a etc. of the test body 7 on transfer unit 40) by sample process unit 10.In addition, about the detailed construction of sample process unit 10, will discuss below.
Sample has been discharged to the test body 7 on each test pad 7a by transfer unit 40, transfers from sample process unit 10 to inspection unit 70.As shown in Figure 2, the transfer direction (arrow A R1 direction) of test body 7 and the advance and retreat direction (arrow A R2 direction) of nozzle 11 roughly orthogonal.
Inspection unit 70 is made a video recording to each test pad 7a, and, image procossing is carried out to acquired view data, thus performs the judgement of the mensuration project corresponding with each test pad 7a.
Control module 90 is electrically connected with sample process unit 10, transfer unit 40 and inspection unit 70 via signal wire 98,99, controls the action of these unit 10,40,70.In addition, about the detailed construction of control module 90, will discuss below.
<2. the structure > of sample process unit
Fig. 3 ~ Fig. 6 is the stereographic map of an example of the structure representing sample process unit 10 respectively.As shown in Fig. 3 and Fig. 6, sample process unit 10 mainly has: nozzle 11, lifting unit 15 and advance and retreat portion 20.
Nozzle 11 is the cylindrical body formed by the material with electric conductivity.The sample or cleaning fluid that attract can be discharged from the front end 11a of nozzle 11.In addition, about the structure of the pipe arrangement be connected communicatively with nozzle 11, will discuss below.
Lifting unit 15 makes nozzle 11 be elevated relative to the liquid level of the sample stored in centrifuge tube 5.As shown in FIG. 4 and 5, lifting unit 15 mainly has: lifting table 16, feed screw 17, lifting motor 18 and lifting guiding piece 19.
Lifting table 16 is tabular bodys of fixed nozzle 11, is formed with the threaded hole screwed up with feed screw 17.In addition, lifting table 16 can move relative to the lifting guiding piece 19 with feed screw 17 configured in parallel.Further, feed screw 17 links with the turning axle of lifting with motor 18.
Thus, by making lifting motor 18 rotate forward or backwards, lifting table 16 is mobile along the bearing of trend (arrow A R3 direction) of feed screw 17 and lifting guiding piece 19.Therefore, nozzle 11 can attract to be elevated between the retreating position (with reference to Fig. 5) above the attraction position of the sample stored in centrifuge tube 5 (with reference to Fig. 4) and centrifuge tube 5.
Advance and retreat portion 20 makes lifting unit 15 retreat between the top position of centrifuge tube 5 and the top position of transfer unit 40.As shown in Fig. 3 and Fig. 6, advance and retreat portion 20 mainly has: upward guide piece 21 and upward guide piece 22, belt wheel 24 (24a, 24b), band 25, advance and retreat motor 27 and fixture 28.
Upward guide piece 21 and upward guide piece 22 make lifting unit 15 slide along advance and retreat direction (arrow A R2 direction).Belt wheel 24 (24a, 24b) rotates centered by the axle center almost parallel with arrow A R1 direction.In addition, band 25 is wound with in the periphery of belt wheel 24 (24a, 24b).In addition, the axle center of belt wheel 24a links with the turning axle of retreating with motor 27.Further, lifting unit 15 is fixed on band 25 by fixture 28.
Thus, by making advance and retreat motor 27 rotate forward or backwards, lifting unit 15 is mobile along advance and retreat direction (arrow A R2 direction).Therefore, as shown in Figure 2, nozzle 11 can be retreated between the attraction position of sample and the drain position of discharging sample to test body 7.
<3. the matched tube structure > of device for analyzing samples
Fig. 7 is the figure of an example of the matched tube structure representing feed system in device for analyzing samples 1 and the system of discharge.At this, the pipe arrangement etc. be connected with the feed system of gas supply part 45 and cleaning solution supply part 50 is described.
Gas supply part 45 is the supply sources to nozzle 11 supply gas.As shown in Figure 7, gas supply part 45 is connected with nozzle 11 communicatively via pipe arrangement 46 and shared pipe 49.Gas is mixed into and is arranged in pipe arrangement 46 with pump 47, is carried by gas to nozzle 11 side.Valve 48 is arranged on the solenoid valve in pipe arrangement 46.Using the circulating direction (that is, the direction of flowing from gas supply part 45 to nozzle 11) of the gas in pipe arrangement 46 as benchmark, valve 48 is arranged on gas and is mixed into downstream with pump 47.
Thus, by the state opened at valve 48, gas is mixed into and drives with pump 47, gas is fed into nozzle 11.At this, when adopting air as the gas being fed into nozzle 11, special gas supply part 45 also can not be set and the air in environment is imported in pipe arrangement 46.That is, the open at one end of pipe arrangement 46.
Cleaning solution supply part 50 is the supply sources supplying electrolytical cleaning fluid (such as, comprising the solution of sodion) (second liquid) to nozzle 11 and not shown cleaning unit.As shown in Figure 7, cleaning solution supply part 50 is connected with nozzle 11 communicatively via pipe arrangement 51 and shared pipe 49.At this, as the material of pipe arrangement 51 and shared pipe 49, such as, adopt the insulating material that ethylene tube is such.In addition, nozzle 11 is cleaned by not shown cleaning unit.
Extraction pump 54 is arranged in pipe arrangement 51, is carried by cleaning fluid to nozzle 11 side.That is, extraction pump 54 is used as to supply from cleaning solution supply part 50 and the discharge portion that the cleaning fluid of circulation is discharged from nozzle 11 in pipe arrangement 51.
Valve 55 is arranged on the solenoid valve in pipe arrangement 51.When using circulating direction (direction of flowing from cleaning solution supply part 50 to nozzle 11) (hreinafter referred to as " first circulating direction ") of the cleaning fluid in pipe arrangement 51 as benchmark, valve 55 is arranged on the downstream of extraction pump 54.
When using the first circulating direction as benchmark, suction pump 56 is arranged on the downstream of extraction pump 54 and valve 55.Sample in nozzle 11 and shared pipe 49 can extrude along the first circulating direction by suction pump 56, and, can attract along the direction contrary with the first circulating direction.That is, suction pump 56 can as the suction unit be attracted to by sample 5a under the state be immersed at the front end 11a of nozzle 11 in sample 5a in nozzle 11.
Thus, by performing the attraction action of suction pump 56 under the state of closing at valve 55, the sample 5a stored in centrifuge tube 5 attracted in nozzle 11 and (according to different situations, attracted in shared pipe 49).On the other hand, by under the state opened at valve 55, extraction pump 54 is driven, discharge cleaning fluid from nozzle 11.That is, pipe arrangement 51 and shared pipe 49 are connected communicatively with nozzle 11 and cleaning solution supply part 50, are used as the supplying tubing supplying cleaning fluid to nozzle 11.
In addition, drive with pump 47 by making extraction pump 54 and gas be mixed under the state opened at valve 48 and valve 55, the cleaning fluid of the bubble of air inclusion can be discharged from nozzle 11.In this case, and do not have compared with alveolate cleaning fluid, can cleaning force be improved.
Grounding parts 57 is electric conductors of the tubular of the part being arranged on pipe arrangement 51, is configured in as shown in Figure 7 between cleaning solution supply part 50 and extraction pump 54.The cleaning fluid of circulation and the contact internal walls of grounding parts 57 in pipe arrangement 51.In addition, the periphery of grounding parts 57 is connected with the reference potential point of framework 1a, easily can carry out the reference potential point of framework 1a and the electrical connection of grounding parts 57.Thus, the current potential that easily can make the cleaning fluid of circulation in pipe arrangement 51 and shared pipe 49 is reference potential.At this, as the material of grounding parts 57, also such as stainless steel can be adopted.
<4. the structure > of control module
Fig. 8 is the block diagram of an example of the structure representing control module 90.As shown in Figure 8, control module 90 mainly has: CPU91, storer 92, communication control unit 94 and test section 95.
CPU91, according to the program 92a stored in storer 92, performs the calculation process etc. of data with the opportunity specified.Communication control unit 94 can be mixed into and transmit control signal with pump 47, extraction pump 54, suction pump 56 and valve 48,55 etc. to the lifting motor 18 connected via signal wire 98, advance and retreat motor 27, gas.Thus, communication control unit 94 can make the work such as these components 18,27,47,48,54,55,56 with the opportunity of regulation.
In addition, consider the situation of paper, in fig. 8, as the component be connected with signal wire 98, only illustrate lifting motor 18 and advance and retreat motor 27.
Test section 95 is based on the change of electrostatic capacitance, and whether the front end 11a detecting the nozzle 11 utilizing lifting unit 15 to be elevated reaches the liquid level of sample 5a.As shown in Figure 8, test section 95 is electrically connected with nozzle 11 via signal wire 99.
Fig. 9 and Figure 10 is the figure of the level detection principle for illustration of the change based on electrostatic capacitance respectively.At this, when electrostatic capacitance value between the nozzle 11 being about to by the front end 11a of nozzle 11 to arrive before the liquid level of sample 5a and reference potential point is set to " C1 " (with reference to Fig. 9), the front end 11a of nozzle 11 reach the liquid level of sample 5a moment place electrostatic capacitance value be " C1+C2 ".
That is, when the front end 11a of nozzle 11 arrives the liquid level of sample 5a, the electrostatic capacitance value between nozzle 11 and reference potential point changes " C2 " sharp.Therefore, test section 95, by monitoring the change of this electrostatic capacitance, judges whether the front end 11a of nozzle 11 reaches liquid level.
But, when the pipe arrangement 51 be connected communicatively with nozzle 11 and shared pipe 49 are formed by the insulating material that ethylene tube is such, when making electrolytical cleaning fluid circulate in these pipe arrangements 51 and shared pipe 49, following such problem can be produced.
That is, the stream (supplying tubing) of cleaning fluid plays a role as antenna, and this stream becomes the noise in noise source or device for analyzing samples 1 or the noise that produces because of other equipment is received by this stream.Consequently, produce can not Accurate Determining level detection time the such problem of the change of electrostatic capacitance.
So, in the device for analyzing samples 1 of present embodiment, in order to eliminate problem as above, pipe arrangement 51 is provided with grounding parts 57.Thus, the stream of cleaning fluid can be hindered to play a role as antenna.Therefore, even if when adopting electrolytical liquid as cleaning fluid, also can Accurate Determining level detection time the change of electrostatic capacitance.
<5. the advantage > of the device for analyzing samples of present embodiment
As mentioned above, in the device for analyzing samples 1 of present embodiment, based on the level detection of the sample 5a of the change of electrostatic capacitance, the state be grounded with the electrolytical cleaning fluid of circulation in pipe arrangement 51 and shared pipe 49 (supplying tubing) performs.
Thus, can prevent pipe arrangement 51 and shared pipe 49 from becoming noise source and the noise that no longer can accurately detect because of this noise in the such problem of the change of electrostatic capacitance and device for analyzing samples 1 or the noise that produces because of other equipment are received such problem by pipe arrangement 51 and shared pipe 49.
Therefore, even if when electrolytical cleaning fluid circulates in pipe arrangement 51 and shared pipe 49, whether the front end 11a that also can perform nozzle 11 well reaches the judgement of the liquid level of sample 5a, can prevent the error detection of liquid level position.
<6. variation >
Above, embodiment of the present utility model is illustrated, but the utility model is not limited to above-mentioned embodiment, can various distortion be carried out.
(1) in embodiment of the present utility model, device for analyzing samples 1 is illustrated as the device for analyzing samples with single grounding parts 57, but is not limited to this.Device for analyzing samples 1 also can have multiple grounding parts 57.
(2) and, in embodiment of the present utility model, grounding parts 57 is illustrated as the electric conductor of tubular of the part being arranged on pipe arrangement 51, but is not limited to this.Such as, grounding parts 57 also can have: the electric wire being configured in the electrode in pipe arrangement 51 and being connected with the reference potential point outside pipe arrangement 51 by this electrode.That is, as long as grounding parts 57 is arranged at pipe arrangement 51 and is electrically connected just enough by the cleaning fluid of circulation in pipe arrangement 51 and reference potential point.
(3) and, in embodiment of the present utility model, describe electrolytical cleaning fluid is fed into pipe arrangement 51 and shared pipe 49 structure from cleaning solution supply part 50, but the purposes of liquid is not limited to this.That is, even if when using the liquid supply unit of the electrolytical liquid of supply, the error detection of liquid level position similarly also can be prevented.
(4) and, in embodiment of the present utility model, describe the structure that the liquid level of sample is detected, but be not limited to this.That is, the device 1 of present embodiment also can be used as the liquid level sensor detected object of liquid level not being defined as liquid sample.
(5) and, in embodiment of the present utility model, the change described based on electrostatic capacitance performs the structure of level detection, but is not limited to this.That is, the technology by using grounding parts 57 to make liquid ground connection carry out the impact of restraint speckle is also effective when performing level detection based on impedance variation.
Claims (17)
1. a liquid level sensor, is characterized in that, has:
The nozzle of tubular, described nozzle has electric conductivity, for attracting the first liquid stored in reservoir;
Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described first liquid stored in described reservoir;
Test section, described test section is based on the change of electrostatic capacitance, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described first liquid;
Supplying tubing, described supplying tubing is connected communicatively with described nozzle;
Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described first liquid, is attracted to by described first liquid in described nozzle;
Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical second liquid circulated in described supplying tubing discharge from described nozzle; And
Grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing that described second liquid is circulated is electrically connected with reference potential point.
2. liquid level sensor as claimed in claim 1, is characterized in that,
Described grounding parts is the electric conductor of the part being arranged on described supplying tubing.
3. liquid level sensor as claimed in claim 1, is characterized in that,
When using the circulating direction of the described second liquid in described supplying tubing as benchmark, described suction unit is arranged on the downstream of described discharge portion.
4. the liquid level sensor according to any one of claims 1 to 3, is characterized in that,
Described grounding parts is arranged between described discharge portion and described liquid supply unit.
5. liquid level sensor as claimed in claim 1, is characterized in that,
Described liquid supply unit is cleaning solution supply part cleaning fluid being supplied to described supplying tubing as described second liquid.
6. liquid level sensor as claimed in claim 1, is characterized in that,
Described nozzle is that the sample that sample carries out attracting as described first liquid is attracted nozzle.
7. liquid level sensor as claimed in claim 6, is characterized in that,
Described sample is urine.
8. a liquid level sensor, is characterized in that, has:
The nozzle of tubular, described nozzle has electric conductivity, for attracting the first liquid stored in reservoir;
Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described first liquid stored in described reservoir;
Test section, described test section is based on impedance variation, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described first liquid;
Supplying tubing, described supplying tubing is connected communicatively with described nozzle;
Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described first liquid, is attracted to by described first liquid in described nozzle;
Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical second liquid circulated in described supplying tubing discharge from described nozzle; And
Grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing that described second liquid is circulated is electrically connected with reference potential point.
9. a device for analyzing samples, is characterized in that, has:
Sample process unit, described sample process unit is for attracting sample; And
Inspection unit, described inspection unit measures the sample attracted by described sample process unit,
Described sample process unit has:
The nozzle of tubular, described nozzle has electric conductivity, for attracting the sample stored in reservoir;
Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described sample stored in described reservoir;
Test section, described test section is based on the change of electrostatic capacitance, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described sample;
Supplying tubing, described supplying tubing is connected communicatively with described nozzle;
Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described sample, is attracted to by described sample in described nozzle;
Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical liquid circulated in described supplying tubing discharge from described nozzle; And
Grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing of described liquid communication is electrically connected with reference potential point.
10. device for analyzing samples as claimed in claim 9, is characterized in that,
Described grounding parts is the electric conductor of the part being arranged on described supplying tubing.
11. device for analyzing samples as claimed in claim 9, is characterized in that,
When using the circulating direction of the described liquid in described supplying tubing as benchmark, described suction unit is arranged on the downstream of described discharge portion.
12. device for analyzing samples according to any one of claim 9 ~ 11, is characterized in that,
Described grounding parts is arranged between described discharge portion and described liquid supply unit.
13. device for analyzing samples as claimed in claim 9, is characterized in that,
Also there is cleaning solution supply part cleaning fluid being supplied to described supplying tubing as described liquid.
14. device for analyzing samples as claimed in claim 9, is characterized in that,
Described reservoir is sample container,
Described device for analyzing samples also has the supply unit described sample container being transported to and being carried out the sample attraction position attracted by described nozzle.
15. device for analyzing samples as claimed in claim 9, is characterized in that,
Described sample is urine.
16. device for analyzing samples as claimed in claim 15, is characterized in that,
Described inspection unit is configured to, and makes a video recording, carries out image procossing to acquired view data, thus check the composition in described urine to the test pad comprising the described urine of being discharged by described nozzle.
17. 1 kinds of device for analyzing samples, is characterized in that having:
Sample process unit, described sample process unit is for attracting sample; And
Inspection unit, described inspection unit measures the sample attracted by described sample process unit,
Described sample process unit has:
The nozzle of tubular, described nozzle has electric conductivity, for attracting the sample stored in reservoir;
Lifting unit, described lifting unit makes described nozzle be elevated relative to the liquid level of the described sample stored in described reservoir;
Test section, described test section is based on impedance variation, and whether the front end detecting the described nozzle utilizing described lifting unit to be elevated reaches the described liquid level of described sample;
Supplying tubing, described supplying tubing is connected communicatively with described nozzle;
Suction unit, described suction unit is arranged at described supplying tubing, under the state that the described front end of described nozzle is immersed in described sample, is attracted to by described sample in described nozzle;
Discharge portion, described discharge portion is arranged at described supplying tubing, will from liquid supply unit supply and the electrolytical liquid circulated in described supplying tubing discharge from described nozzle; And
Grounding parts, described grounding parts is arranged at described supplying tubing, and a part for the described supplying tubing of described liquid communication is electrically connected with reference potential point.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014192041A JP6412382B2 (en) | 2014-09-20 | 2014-09-20 | Sample analyzer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112654872A (en) * | 2018-10-31 | 2021-04-13 | 株式会社日立高新技术 | Electrolyte analysis device |
| CN114441238A (en) * | 2020-11-04 | 2022-05-06 | 深圳市帝迈生物技术有限公司 | Sampling device, analyzer and sampling method for analyzer |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483070B (en) * | 2016-12-20 | 2023-08-18 | 杭州聚光环保科技有限公司 | Flow cell applied to liquid on-line detection and working method thereof |
| JP7451252B2 (en) | 2020-03-23 | 2024-03-18 | キヤノンメディカルシステムズ株式会社 | automatic analyzer |
| CN116105547A (en) * | 2023-04-07 | 2023-05-12 | 山西壶化集团金星化工有限公司 | Detonating tool production equipment and production system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04323564A (en) * | 1991-04-23 | 1992-11-12 | Hitachi Ltd | Sensor-integrated probe |
| JPH09127132A (en) * | 1995-10-31 | 1997-05-16 | Hitachi Ltd | Liquid-level detector |
| JP2007322285A (en) * | 2006-06-01 | 2007-12-13 | Olympus Corp | Dispenser |
| JP2011128075A (en) * | 2009-12-18 | 2011-06-30 | Beckman Coulter Inc | Automatic analyzer, and specimen stirring method and specimen dispensation method of the automatic analyzer |
| US9599501B2 (en) * | 2011-12-29 | 2017-03-21 | Abbott Laboratories | Devices and systems for liquid level detection in hematology instruments, and methods related thereto |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112654872A (en) * | 2018-10-31 | 2021-04-13 | 株式会社日立高新技术 | Electrolyte analysis device |
| CN114441238A (en) * | 2020-11-04 | 2022-05-06 | 深圳市帝迈生物技术有限公司 | Sampling device, analyzer and sampling method for analyzer |
| CN114441238B (en) * | 2020-11-04 | 2023-07-18 | 深圳市帝迈生物技术有限公司 | Sampling device, analyzer and sampling method for analyzer |
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| JP6412382B2 (en) | 2018-10-24 |
| JP2016061746A (en) | 2016-04-25 |
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