CN109142199A - A kind of threshold calibration method of laser dust particle counter channel voltage - Google Patents
A kind of threshold calibration method of laser dust particle counter channel voltage Download PDFInfo
- Publication number
- CN109142199A CN109142199A CN201811047736.9A CN201811047736A CN109142199A CN 109142199 A CN109142199 A CN 109142199A CN 201811047736 A CN201811047736 A CN 201811047736A CN 109142199 A CN109142199 A CN 109142199A
- Authority
- CN
- China
- Prior art keywords
- digital regulation
- particle counter
- dust particle
- laser dust
- potentiometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Electro-optical investigation, e.g. flow cytometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Electro-optical investigation, e.g. flow cytometers
- G01N2015/1486—Counting the particles
Abstract
The present invention relates to a kind of threshold calibration method of laser dust particle counter channel voltage, includes the following steps: to provide laser dust particle counter and several digital regulation resistances, laser dust particle counter and digital regulation resistance are correspondingly connected with；And according to voltage principle, the voltage threshold of the tap joint of the digital regulation resistance is calculated；The piece of the digital regulation resistance is selected into potentiometer connector zero setting, and the Serial Peripheral Interface (SPI) of the laser dust particle counter and several digital regulation resistances is subjected to data communication, the voltage threshold is written in the register of the digital regulation resistance and is exported via the tap joint.The method of the present invention can precisely adjust voltage threshold and without tearing machine operation open, convenient and efficient.
Description
Technical field
The present invention relates to a kind of threshold calibration methods of laser dust particle counter channel voltage.
Background technique
Laser dust particle counter possesses 6 partial size channels, including 0.3 μm, 0.5 μm, 1.0 μm, 3.0 μm, 5.0 μm,
10.0 μm, each channel is required to that respective threshold voltage value is arranged, if threshold voltage value setting is excessive, corresponding partial size channel
Particle counting will become smaller；, whereas if threshold voltage value setting is too small, the particle counting in corresponding partial size channel will become
Greatly.It is very accurate that this just needs threshold voltage to be arranged, and it is accurate to count.Currently, producer is all made of mechanical potentiometer progress
The adjusting of threshold voltage.But mechanical potentiometer has the disadvantage that
1, the service life is short, precision is low, volume is big；
2, mechanical potentiometer can not carry out reading and writing data, and threshold voltage cannot accurately be arranged；
3, mechanical potentiometer needs manually adjust, and carrying out tearing machine open when being demarcated could operate.
Summary of the invention
The purpose of the present invention is to provide one kind can precisely adjust voltage threshold and the laser dust without tearing machine operation open
The threshold calibration method of corpuscular counter channel voltage.
In order to achieve the above objectives, the invention provides the following technical scheme: a kind of laser dust particle counter channel voltage
Threshold calibration method, described method includes following steps:
Laser dust particle counter is provided and several digital regulation resistances, the laser dust particle counter are provided with
Several partial size channels, the digital regulation resistance include the first potentiometer connector, the second potentiometer connector and tap joint, if
Dry the first potentiometer connector and the second potentiometer connector are correspondingly connected with several partial size channels；
External first fixed resistance of first potentiometer connector, the fixed electricity of the second potentiometer connector external second
Resistance, the resistance value of the first potentiometer connector is identical as the second potentiometer connector resistance value, according to voltage principle, calculates
Obtain the voltage threshold of the tap joint；
The piece of the digital regulation resistance is selected into potentiometer connector zero setting, and by the laser dust particle counter with it is several
The Serial Peripheral Interface (SPI) of a digital regulation resistance carries out data communication, and the digital regulation resistance is written in the voltage threshold
It is exported in register and via the tap joint.
Further, the digital regulation resistance is MCP42010 digital regulation resistance.
Further, the first potentiometer connector is PA0 potentiometer connector, and the second potentiometer connector is PB0 electricity
Position device connector, the tap joint are PW0 potentiometer connector.
Further, the laser dust particle counter is provided with 6 partial size channels, a digital regulation resistance with
2 partial size channel connections.
The beneficial effects of the present invention are: by by the partial size channel of laser dust particle counter and digital regulation resistance
Potentiometer channel is correspondingly connected with, and realizes the purpose of the voltage threshold in each partial size channel of accurate calculation, and available electric with number
The voltage threshold in partial size channel is adjusted in the software of position device connection, tears machine operation, convenient and efficient, practicability open without carrying out
By force.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the flow chart of the threshold calibration method of laser dust particle counter channel voltage of the invention.
Fig. 2 is the circuit design drawing of digital regulation resistance.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Referring to Figure 1, the threshold value mark of the laser dust particle counter channel voltage in a preferred embodiment of the invention
The method of determining includes the following steps:
Laser dust particle counter is provided and several digital regulation resistances, the laser dust particle counter are provided with
Several partial size channels, the digital regulation resistance include the first potentiometer connector, the second potentiometer connector and tap joint, if
Dry the first potentiometer connector and the second potentiometer connector are correspondingly connected with several partial size channels；
External first fixed resistance of first potentiometer connector, the fixed electricity of the second potentiometer connector external second
Resistance, the resistance value of the first potentiometer connector is identical as the second potentiometer connector resistance value, according to voltage principle, calculates
Obtain the voltage threshold of the tap joint；
The piece of the digital regulation resistance is selected into potentiometer connector zero setting, and by the laser dust particle counter with it is several
The Serial Peripheral Interface (SPI) of a digital regulation resistance carries out data communication, and the digital regulation resistance is written in the voltage threshold
It is exported in register and via the tap joint.
In the present embodiment, the digital regulation resistance is MCP42010 digital regulation resistance.Really, in other embodiments,
The digital regulation resistance can also be other models, it is not limited here.
Fig. 2 is referred to, the circuit design drawing of the MCP42010 digital regulation resistance is as shown in the figure.Correspondingly, described first
Potentiometer connector is PA0 potentiometer connector, and the second potentiometer connector is PB0 potentiometer connector, and the tap joint is PW0
Potentiometer connector.The laser dust particle counter is provided with 6 partial size channels, respectively 0.3 μm, 0.5 μm, 1.0 μm,
3.0 μm, 5.0 μm and 10.0 μm.Each channel is required to that respective threshold voltage value is arranged, if threshold voltage value was arranged
Greatly, the particle counting in corresponding partial size channel will become smaller；, whereas if threshold voltage value setting is too small, corresponding partial size channel
Particle counting will become larger.It is very accurate that this just needs threshold voltage to be arranged, and it is accurate to count.
In the present embodiment, a digital regulation resistance is connect with 2 partial size channels.As shown in Fig. 2, with 0.3 μ
For m partial size corridorbarrier function: PA0 potentiometer connector and PB0 potentiometer connector are MCP42010 potentiometer connector, and PW0 is tap
Connector.The external 100K Ω resistance of PA0 potentiometer connector simultaneously connects 12V supply voltage, and the external 430 Ω resistance of PB0 potentiometer connector is simultaneously
Ground connection.Since MCP42010 two-way potentiometer resistance is 10K Ω, according to voltage principle, PW0 potentiometer can be calculated
Connector output voltage threshold value is in 46.7mV~1133.4mV.When carrying out threshold voltage calibration, software is first by the piece of MCP42010
It selects pin CS to set 0, choose current chip and data communication is carried out by SPI interface, then voltage threshold is written MCP42010 pairs
In the register answered, PW0 potentiometer connector, that is, exportable corresponding threshold voltage.Remaining partial size channel uses same side
Method finally realizes the calibration of the voltage threshold in all partial size channels.
In summary: by by the potentiometer channel pair in the partial size channel of laser dust particle counter and digital regulation resistance
Should connect, realize each partial size channel of accurate calculation voltage threshold purpose, and it is available connect with digital regulation resistance it is soft
The voltage threshold in partial size channel is adjusted in part, tears machine operation open without carrying out, convenient and efficient, practical.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (4)
1. a kind of threshold calibration method of laser dust particle counter channel voltage, which is characterized in that the method includes such as
Lower step:
Laser dust particle counter is provided and several digital regulation resistances, the laser dust particle counter are provided with several
A partial size channel, the digital regulation resistance include the first potentiometer connector, the second potentiometer connector and tap joint, several
The first potentiometer connector and the second potentiometer connector are correspondingly connected with several partial size channels；
External first fixed resistance of first potentiometer connector, external second fixed resistance of the second potentiometer connector, institute
The resistance value for stating the first potentiometer connector is identical as the resistance value of the second potentiometer connector, according to voltage principle, calculates
The voltage threshold of the tap joint out；
The piece of the digital regulation resistance is selected into potentiometer connector zero setting, and by the laser dust particle counter and several institutes
The Serial Peripheral Interface (SPI) for stating digital regulation resistance carries out data communication, and the voltage threshold is written to the deposit of the digital regulation resistance
It is exported in device and via the tap joint.
2. the threshold calibration method of laser dust particle counter channel voltage as described in claim 1, which is characterized in that institute
Stating digital regulation resistance is MCP42010 digital regulation resistance.
3. the threshold calibration method of laser dust particle counter channel voltage as claimed in claim 2, which is characterized in that institute
Stating the first potentiometer connector is PA0 potentiometer connector, and the second potentiometer connector is PB0 potentiometer connector, and the tap connects
Head is PW0 potentiometer connector.
4. the threshold calibration method of laser dust particle counter channel voltage as described in claim 1, which is characterized in that institute
It states laser dust particle counter and is provided with 6 partial size channels, a digital regulation resistance and 2 partial size channels connect
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811047736.9A CN109142199A (en) | 2018-09-10 | 2018-09-10 | A kind of threshold calibration method of laser dust particle counter channel voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811047736.9A CN109142199A (en) | 2018-09-10 | 2018-09-10 | A kind of threshold calibration method of laser dust particle counter channel voltage |
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| Publication Number | Publication Date |
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| CN109142199A true CN109142199A (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811047736.9A Pending CN109142199A (en) | 2018-09-10 | 2018-09-10 | A kind of threshold calibration method of laser dust particle counter channel voltage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552050A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Working method of particle counter |
| CN113552046A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Calibration method and working method of particle counter |
| CN113552044A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Particle counter metering method |
| CN113552049A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Working method of particle counter |
| CN113552048A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Particle counting method |
| CN113552045A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Calibration method and working method of particle counter |
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| CN202033271U (en) * | 2011-04-13 | 2011-11-09 | 苏州苏净仪器自控设备有限公司 | Laser dust particle counter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552050A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Working method of particle counter |
| CN113552046A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Calibration method and working method of particle counter |
| CN113552044A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Particle counter metering method |
| CN113552049A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Working method of particle counter |
| CN113552048A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Particle counting method |
| CN113552045A (en) * | 2021-07-26 | 2021-10-26 | 苏州苏信环境科技有限公司 | Calibration method and working method of particle counter |
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Application publication date: 20190104 |
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