CN109238397A - liquid detecting circuit - Google Patents
liquid detecting circuit Download PDFInfo
- Publication number
- CN109238397A CN109238397A CN201710556006.0A CN201710556006A CN109238397A CN 109238397 A CN109238397 A CN 109238397A CN 201710556006 A CN201710556006 A CN 201710556006A CN 109238397 A CN109238397 A CN 109238397A
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- Prior art keywords
- pin
- chip
- serial communication
- probe
- liquid
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of liquid detecting circuits comprising for generating the control circuit of square-wave pulse；The communicating circuit of ac pulse voltage is generated for receiving the square-wave pulse；Spaced first probe and the second probe, the first probe are connected to communicating circuit for the ac pulse voltage to be applied to liquid to be detected；And it is connected to the detection circuit of the second probe, detection circuit is for detecting the ac pulse voltage and generating detection signal, and the detection signal is for judging whether the liquid to be detected is finished.Compared with the existing technology, fluid present invention detection circuit structure is simple.
Description
Technical field
The present invention relates to a kind of liquid detecting circuit more particularly to a kind of liquid detecting circuits for gene sequencer.
Background technique
Gene sequencer is usually required using plurality of reagents.The prior art generally passes through artificial detection and is placed in workbench
Whether reagent is finished, and then replaces reagent manually.As gene sequencer industrial automatization increasingly improves, a kind of knot is needed
Structure simply can automatically detect the liquid detecting circuit whether reagent is finished.
Summary of the invention
The purpose of the present invention is to provide a kind of simple liquid detecting circuits of structure.
A kind of liquid detecting circuit, characterized by comprising:
Control circuit, for generating square-wave pulse；
Communicating circuit generates ac pulse voltage for receiving the square-wave pulse；
Spaced first probe and the second probe, the first probe are connected to communicating circuit and are used for the ac pulse voltage
It is applied to liquid to be detected；And
Detection circuit is connected to the second probe, for detecting the ac pulse voltage and generating detection signal, the detection letter
Number for judging whether the liquid to be detected is finished.
Further, the liquid detecting circuit further includes host computer, the control circuit according to detection signal judge to
Whether detection liquid is finished, and notifies host computer to supplement liquid to be detected by communicating circuit.
Further, the control circuit is singlechip chip.
Further, the singlechip chip includes the first to the 8th pin, and the first pin of singlechip chip connects reference
Voltage, the second pin of singlechip chip connect power supply, and the third pin of singlechip chip is for receiving detection signal, monolithic machine core
4th pin of piece is grounded, and the 5th pin and the 6th pin of singlechip chip connect respectively as single-chip microcontroller receiving end and transmitting terminal
Be connected to communicating circuit for and host computer establish communication connection, the 7th pin of singlechip chip be connected to communicating circuit be used for mention
For the square-wave signal to communicating circuit, the first diode and first resistor of the 8th pin series opposing of singlechip chip connect
It is connected to power supply.
Further, the communicating circuit is serial communication chip.
Further, the serial communication chip includes the first to the 16th pin, the first pin of serial communication chip
Third capacitor is connected between third pin, the second pin of serial communication chip is through the 5th capacity earth, serial communication chip
The 4th pin and the 5th pin between connect the 4th capacitor, the 6th pin of serial communication chip is through the 6th capacity earth；String
The 7th pin and the 8th pin of port communications chip communicate transmitting terminal respectively as host computer and receiving end is connected to host computer, goes here and there
9th pin of port communications chip and the tenth pin are separately connected the 5th pin and the 6th pin of singlechip chip；Serial communication
11st pin of chip is connected to the 7th pin of singlechip chip for receiving square-wave signal；The tenth of serial communication chip
Two pins are connected to the third pin of singlechip chip for sending detection signal；Tenth three-prong of serial communication chip connects
To detection circuit for receiving the detection signal；14th pin of serial communication chip is connected to the first probe.
Further, the detection circuit includes switching tube, third diode, the 4th diode, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 13rd capacitor, the connecting pin ground connection of the switching tube, another connection of switching tube
Tenth three-prong of end connection serial communication chip simultaneously connects power supply, the control terminal series connection the of the switching tube via the 5th resistance
Seven resistance and reversed third diode are connected to the second probe, and the control terminal of the switching tube is also connected the 8th resistance, reversed
The 4th diode and the 13rd capacitance connection to the second probe, the second probe is through the 6th resistance eutral grounding.
Further, the reference voltage is power supply series connection second resistance and the component voltage that 3rd resistor ground connection generates.
Further, the third pin of singlechip chip is also via the 4th resistance eutral grounding.
Further, first capacitor and second capacity earth of the power supply after parallel connection.
Compared with the existing technology, the communicating circuit that the present invention uses both can produce for detect liquid whether be finished or
No emptying alternating-current pulse, and communication connection can be realized between host computer and control circuit, not only circuit structure is simple, but also
Cost is relatively low, convenient for promoting and using.
Detailed description of the invention
Fig. 1 is the block diagram of an embodiment of the present invention liquid detecting circuit.
Fig. 2 is the circuit diagram of the control circuit of one embodiment of Fig. 1 liquid detecting circuit.
Fig. 3 is the circuit diagram of the communicating circuit of one embodiment of Fig. 1 liquid detecting circuit.
Fig. 4 is the circuit diagram of the detection circuit of one embodiment of Fig. 1 liquid detecting circuit.
Fig. 5 is the circuit diagram of the power supply of one embodiment of Fig. 1 liquid detecting circuit.
Fig. 6 is the waveform diagram for the square-wave signal that Fig. 1 liquid detecting circuit generates.
Fig. 7 is the waveform diagram for the ac pulse voltage that Fig. 1 liquid detecting circuit generates.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and the embodiments,
The present invention will be described in further detail.
With reference to Fig. 1, liquid detecting circuit of the invention includes control circuit 10, communicating circuit 20, detection circuit 30, first
Probe 41, the second probe 42 and host computer 50.
Control circuit 10 is for generating square-wave pulse.
Communicating circuit 20 generates ac pulse voltage for receiving the square-wave pulse.
First probe 41 and the second probe 42 are arranged at intervals in liquid 60 to be detected, and the first probe 41 is connected to communication electricity
Road is for receiving the ac pulse voltage and the ac pulse voltage being applied to liquid 60 to be detected.
Detection circuit 30 is connected to the second probe 42, for detecting the alternating-current pulse and generating detection signal, the inspection
Signal is surveyed for judging whether the liquid to be detected is finished or whether empties.
In the present embodiment, the detection signal is transmitted to the control circuit 10, the control electricity by communicating circuit 20
Road 10 judges whether the liquid to be detected is finished or empties according to detection signal.Control circuit 10 described in the present embodiment passes through
Communicating circuit 20 and the host computer 50 establish communication connection, when the control circuit 10 is according to detection signal judgement detection liquid
60 when being finished or emptying, and control circuit 10 notifies host computer 50 to supplement liquid to be detected by communicating circuit 20.In the present embodiment,
The host computer 50 is the control host of high-throughput gene sequencing equipment, and the liquid to be detected is examination used in gene sequencing
Agent.
In alternate embodiment, the control circuit 10 judges whether the liquid to be detected is filled according to detection signal.When
When the control circuit 10 is filled according to detection signal judgement detection liquid 60, control circuit 10 passes through in the notice of communicating circuit 20
Position machine 50 empties liquid to be detected.In the present embodiment, the host computer 50 is the control host of high-throughput gene sequencing equipment, institute
Stating detection liquid is waste liquid caused by gene sequencing.
Please also refer to Fig. 2, in the present embodiment, the control circuit 10 is singlechip chip U1, such as STC15W207S
Chip.The singlechip chip U1 includes the first to the 8th pin.
The first pin P54 of singlechip chip U1 connects reference voltage.The reference voltage is power supply VCC series connection second resistance
The partial pressure that R2 and 3rd resistor R3 ground connection generates.
The second pin of singlechip chip U1 meets power supply VCC.
The third pin P55 of singlechip chip U1 is for receiving detection signal CMP+.In the present embodiment, singlechip chip U1
Third pin also via the 4th resistance eutral grounding.
The 4th pin GND of singlechip chip U1 is grounded.
The 5th pin P30 and the 6th pin P31 of singlechip chip U1 connects respectively as single-chip microcontroller receiving end and transmitting terminal
It is connected to communicating circuit 20, and then for establishing communication connection with host computer 50.In the present embodiment, the of the singlechip chip U1
Five pin P30 receive communication signal RXD, the 6th pin P31 transmitting communication letter of the singlechip chip U1 from communicating circuit 20
Number TXD is to communicating circuit 20.
The 7th pin P32 of singlechip chip U1 be connected to communicating circuit 20 be used to provide the described square-wave signal to communication electricity
Road 20.
The first diode D1 and first resistor R1 of the 8th pin P33 series opposing of singlechip chip U1 are connected to power supply
VCC.First diode D1 is light emitting diode in the present embodiment.In one embodiment, the light of the first diode D1 sending
Be used to indicate singlechip chip U1 to detection signal judging result, such as liquid to be detected 60 be reagent when, table can be used to
Show that liquid 60 to be detected has run out；When liquid 60 to be detected is waste liquid, it can indicate that waste liquid is already filled with.
Indicate the working condition of singlechip chip U1.Control circuit 10 according to detection signal judgement detection liquid 60 be finished or
When emptying
In preferred embodiment, first resistor R1 is 3K Ω, and second resistance R2 and 3rd resistor are respectively 10K Ω, and the 4th resistance is
4.7KΩ。
With reference to Fig. 3, in the present embodiment, the communicating circuit 20 is serial communication chip U2, such as MAX3232/232 core
Piece.The serial communication chip U2 includes the first to the 16th pin.
Third capacitor C3 is connected between the first pin C1+ and third pin C1- of serial communication chip U2.
The second pin V+ of serial communication chip U2 is grounded through the 5th capacitor C5.
The 4th capacitor C4 is connected between the 4th pin C2+ and the 5th pin C2- of serial communication chip U2.
The 6th pin V- of serial communication chip U2 is grounded through the 6th capacitor C6.
The 7th pin T2OUT and the 8th pin R2IN of serial communication chip U2 respectively as host computer communication transmitting terminal and
Host computer communication receiving end is connected to host computer 50.
The 9th pin R2OUT and the tenth pin T2IN of serial communication chip U2 is as microcontroller communication receiving end and monolithic
Machine communication transmitting terminal is separately connected the 5th pin P30 and the 6th pin P31 of singlechip chip U1.Serial communication in the present embodiment
The 9th pin R2OUT of chip U2 will be transferred to the 5th pin of singlechip chip U1 from 50 received signal RXD of host computer
P30, and it will be transferred to host computer 50 from the 6th pin P31 received signal TXD of singlechip chip U1, to realize monolithic machine core
Communication connection between piece U1 and host computer 50.
The 11st pin T1IN of serial communication chip U2 is connected to the 7th pin P32 of singlechip chip U1 for receiving
Square-wave signal.
The 12nd pin R1OUT of serial communication chip U2 is connected to the third pin P55 of singlechip chip U1 for sending out
Inspection surveys signal CMP+ and gives singlechip chip U1.
The tenth three-prong R1IN of serial communication chip U2 is connected to detection circuit 30 for receiving the detection signal.
The 14th pin T1OUT of serial communication chip U2 is connected to the first probe 41, by the ac pulse voltage
It is applied to liquid 60 to be detected.
In preferred embodiment, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor are all 0.1uF.
With reference to Fig. 4, the detection circuit 30 includes switching tube Q1, the second diode D2, third diode D3, the four or two pole
Pipe D4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 13rd capacitor C13.
A connecting pin of the switching tube Q1 is grounded, and another connecting pin of switching tube Q1 connects serial communication chip U2
The tenth three-prong R1IN and via the 5th resistance R5 connection power supply VCC.Control terminal the 7th resistance of series connection of the switching tube Q1
R7 and reversed third diode D3 are connected to the second probe 42.The control terminal of the switching tube Q1 also connect the 8th resistance R8,
The 4th reversed diode D4 and the 13rd capacitor C13 are connected to the second probe 41.Second probe 42 is grounded through the 6th resistance R6.
In the present embodiment, detection circuit 30 and communicating circuit 20 are realized and first probe 41 and second by two needle interface circuit J2
Connection between probe 42.
The plus earth of the second diode D2, cathode connect the tenth three-prong R1IN of serial communication chip U2.
With reference to Fig. 5, in the present embodiment, first capacitor C1 and second capacitor C2 ground connection of the 5V power supply VCC after parallel connection.
In preferred embodiment, the switching tube is NPN type triode, such as 9013.The control terminal of the switching tube Q1 is
Base stage, the first connecting pin of switching tube Q1 are emitter-base bandgap grading, and the second connection end of switching tube Q1 is collector.The switching tube Q1 can also be
Metal-oxide-semiconductor, the control terminal of the switching tube Q1 is grid at this time, and the first connecting pin of switching tube Q1 is source electrode, the of switching tube Q1
Two connecting pins are drain electrode.In preferred embodiment, second diode is the voltage-stabiliser tube of 5V, and the 7th capacitor C7 is 0.1uF,
The 13rd capacitor C13 is coupling capacitance.5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8
Respectively 1k Ω, 10K Ω, 10K Ω and 10K Ω.
Fig. 6-7 is referred to together, and when work, singlechip chip U1 generates square-wave signal as shown in FIG. 6, passes through the 7th pin
P32 is supplied to the 11st pin T1IN of serial communication chip U2, and serial communication chip U2 is generated according to the square-wave signal received
The ac pulse voltage of positive and negative 9V as shown in Figure 7, the ac pulse voltage are applied to liquid to be detected by the first probe 41
Body 60.Reagent or waste liquid are detected using the ac pulse voltage of high voltage in the present embodiment, can be effectively prevented the
One probe 41 and 42 surface layer of the second probe generate crystalline solid or electrolytic etching, guarantee that detection process is safe and reliable, and extend probe
Service life.
When the liquid 60 in container is contacted by the second probe 42, the voltage of positive 9V is by the electricity of third diode D3 and the 7th
R7 driving switch pipe Q1 conducting is hindered, then detection circuit 30 provides 0V ground connection to the tenth three-prong R1IN of serial communication chip U2
Voltage is as detection signal.The voltage of negative 9V after the 13rd capacitor C13 is coupled as positive voltage by the 4th diode D4 and
8th resistance R8 driving switch pipe Q1 conducting provides the conduct of 0V ground voltage to the tenth three-prong R1IN of serial communication chip U2
Detect signal.Serial communication chip U2 will test signal and be converted to the third pin for being supplied to singlechip chip U1 after 5V high level
P55, singlechip chip U1 detect signal CMP+ according to this 5V high level and judge that the liquid to be detected is not finished or empties.
When 60 surplus of liquid in container exceeds the second 42 contact range of probe, the second probe 42 cannot receive first
When the ac pulse voltage that probe 41 provides, switching tube Q1 cannot be connected, and detection circuit 30 gives the tenth of serial communication chip U2
Three-prong R1IN provides 5V supply voltage as detection signal.Serial communication chip U2 will test after signal is converted to 0V low level
Third the pin P55, singlechip chip U1 for being supplied to singlechip chip U1 detect signal CMP+ according to this 0V low level and judge institute
Liquid to be detected is stated to have run out or empty.Singlechip chip U1 is established logical by serial communication chip U2 and host computer 50 at this time
News connect and host computer 50 are notified to supplement liquid 60.
Compared with the existing technology, the communicating circuit 20 that the present invention uses both can produce for detect liquid whether be finished or
Alternating-current pulse whether is emptied, and can realize communication connection between host computer 50 and control circuit 10, not only circuit structure letter
It is single, and cost is relatively low, convenient for promoting and using.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of liquid detecting circuit, characterized by comprising:
Control circuit, for generating square-wave pulse；
Communicating circuit generates ac pulse voltage for receiving the square-wave pulse；
Spaced first probe and the second probe, the first probe are connected to communicating circuit and are used for the ac pulse voltage
It is applied to liquid to be detected；And
Detection circuit is connected to the second probe, for detecting the ac pulse voltage and generating detection signal, the detection letter
Number for judging whether the liquid to be detected is finished.
2. liquid detecting circuit according to claim 1, it is characterised in that: it further comprise host computer, the control electricity
Road judges whether liquid to be detected is finished according to detection signal, and notifies host computer to supplement liquid to be detected by communicating circuit.
3. liquid detecting circuit according to claim 2, it is characterised in that: the control circuit is singlechip chip.
4. liquid detecting circuit according to claim 3, it is characterised in that: the singlechip chip includes first to the 8th
Pin, the first pin of singlechip chip connect reference voltage, and the second pin of singlechip chip connects power supply, and the of singlechip chip
Three-prong is for receiving detection signal, the 4th pin ground connection of singlechip chip, the 5th pin of singlechip chip and the 6th pipe
Foot respectively as single-chip microcontroller receiving end and transmitting terminal be connected to communicating circuit for and host computer establish communicate to connect, monolithic machine core
7th pin of piece is connected to communicating circuit and is used to provide the described square-wave signal to communicating circuit, the 8th pin of singlechip chip
The first diode and first resistor of series opposing are connected to power supply.
5. liquid detecting circuit according to claim 4, it is characterised in that: the communicating circuit is serial communication chip.
6. liquid detecting circuit according to claim 5, it is characterised in that: the serial communication chip includes first to the
16 pins, connection third capacitor between the first pin and third pin of serial communication chip, the second of serial communication chip
Pin connects the 4th capacitor, serial communication through the 5th capacity earth between the 4th pin of serial communication chip and the 5th pin
6th pin of chip is through the 6th capacity earth；The 7th pin and the 8th pin of serial communication chip are logical respectively as host computer
News transmitting terminal and receiving end are connected to host computer, and the 9th pin of serial communication chip and the tenth pin are separately connected monolithic machine core
5th pin of piece and the 6th pin；The 7th pin that 11st pin of serial communication chip is connected to singlechip chip is used for
Receive square-wave signal；12nd pin of serial communication chip is connected to the third pin of singlechip chip for sending detection letter
Number；Tenth three-prong of serial communication chip is connected to detection circuit for receiving the detection signal；Serial communication chip
14th pin is connected to the first probe.
7. liquid detecting circuit according to claim 6, it is characterised in that: the detection circuit includes switching tube, third
Diode, the 4th diode, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 13rd capacitor, the switching tube
One connecting pin ground connection, another connecting pin of switching tube connect the tenth three-prong of serial communication chip and via the 5th resistance
Power supply is connected, control terminal the 7th resistance of series connection of the switching tube and reversed third diode are connected to the second probe, described
The control terminal of switching tube is also connected the 8th resistance, the 4th reversed diode and the 13rd capacitance connection to the second probe, and second
Probe is through the 6th resistance eutral grounding.
8. liquid detecting circuit according to claim 3, it is characterised in that: the reference voltage is the second electricity of power supply series connection
The component voltage that resistance and 3rd resistor ground connection generate.
9. liquid detecting circuit according to claim 3, it is characterised in that: the third pin of singlechip chip is also via
Four resistance eutral groundings.
10. liquid detecting circuit according to claim 1, it is characterised in that: first capacitor of the power supply after parallel connection
With the second capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556006.0A CN109238397A (en) | 2017-07-10 | 2017-07-10 | liquid detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556006.0A CN109238397A (en) | 2017-07-10 | 2017-07-10 | liquid detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109238397A true CN109238397A (en) | 2019-01-18 |
Family
ID=65082972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710556006.0A Pending CN109238397A (en) | 2017-07-10 | 2017-07-10 | liquid detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109238397A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023045571A1 (en) * | 2021-09-22 | 2023-03-30 | 青岛海尔生物医疗科技有限公司 | Liquid level measurement apparatus and method for use in culture device, culture device, and medium |
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Application publication date: 20190118 |