CN203803654U - Particle charge amount measurement device - Google Patents

Abstract

The utility model relates to a device for measuring the charged quantity of particles. The device includes a gas cylinder connected in sequence, a particle generating device, a charging device, a detector and an induced draft fan. A first flowmeter is arranged between the gas cylinder and the particle generating device. , a second flowmeter is provided between the detector and the induced draft fan; the charger is arranged at the left end of the detector, and the right end of the detector communicates with the induced draft fan through a pipeline; the charger is connected to the high voltage power supply of the charger through a first wire, The detector is connected with the detector high-voltage power supply through the second wire. The utility model is simple in structure and reasonable in design, and can accurately measure the charging amount of each single particle in the electrostatic precipitator, thereby studying the charging mechanism of the particles of the electrostatic precipitator; it is helpful for the design and research of the electrostatic precipitator system, thereby improving the electrostatic precipitator Dust removal efficiency can effectively control the emission of particulate matter in coal-fired flue gas.

Description

A device for measuring the charging capacity of particulate matter

technical field

The utility model relates to a charge measuring device, in particular to a particle charge measuring device, which belongs to the field of environmental protection. the

Background technique

With the development of industry, my country's current air pollution problem is becoming more and more serious, and the number of pollutants is increasing day by day. Among them, the content of solid particles accounts for the first place in my country's air pollutants, and its concentration is an important indicator to measure the degree of air pollution. The main source of atmospheric particulate matter in my country is a large amount of smoke and dust emitted by coal-fired power plants, and these smoke and dust basically belong to inhalable particulate matter PM10 and PM2.5, which are extremely harmful to human health. This issue has attracted widespread attention from all walks of life across the country. Coal-fired power plants are one of the main sources of PM2.5 in my country. The smoke and dust emissions from coal-fired power plants in my country account for about 50% of the national industrial smoke and dust emissions. The proportion of PM2.5 in the smoke and dust emitted by most coal-fired power plants is greater than 50%. the

In the prior art, the use of electrostatic precipitators to control atmospheric particulate matter is a relatively common method. The dust removal efficiency of electrostatic precipitators in coal-fired power plants can reach 99.99%, but its removal effect on submicron particles is not enough Ideally, the total removal efficiency is less than 50%. the

The charging process of particles in the electrostatic precipitator is mainly divided into two situations: electric field charging and diffusion charging. Electric field charging is that negative ions are injected into much larger dust particles under the action of electric field force to charge them; diffusion The charging is the irregular thermal motion of the ions and the collision with the dust particles to charge them. The amount of charge of the particles directly affects its stress and dust collection effect. Therefore, accurate measurement of the charge amount of particles with different particle sizes is helpful for the design and research of the electrostatic precipitator system, thereby improving the dust removal efficiency of the electrostatic precipitator and effectively To effectively control the emission of particulate matter in coal-fired flue gas. the

Utility model content

The technical problem to be solved by the utility model is to provide a particle charge measuring device, which can accurately measure the charge of each single particle in the electrostatic precipitator, so as to study the charging mechanism of the particles in the electrostatic precipitator. the

The technical scheme that the utility model adopts is:

A device for measuring the charged amount of particulate matter, the device includes a gas cylinder connected in sequence, a particle generating device, a charger, a detector, and an induced draft fan, and a first flowmeter is arranged between the gas cylinder and the particle generating device to detect A second flowmeter is arranged between the device and the induced draft fan; the charge device is arranged at the left end of the detector, and the right end of the detector communicates with the induced draft fan through a pipeline; the charge device is connected with the high voltage power supply of the charge device through the first wire, and the Connect to the detector high-voltage power supply through the second wire.

Preferably, the charging device includes the upper end of the charging device, the middle part of the charging device composed of the grounding electrode of the charging device, the lower end of the charging device, an equalizer plate and the discharge electrode, the upper end of the charging device, the middle part of the charging device composed of the grounding electrode of the charging device, and the charging device. The lower ends of the electrical appliances are connected by threads to form the body of the charger; the equalizer is arranged in the groove between the upper end of the charger and the ground electrode of the charger, the discharge electrode is fixedly connected with the current equalizer, and the discharge electrode is connected to the charger through the first wire. The high-voltage power supply is connected; the upper end of the charging device is provided with an air inlet, and the lower end of the charging device is provided with an air outlet in a horizontal direction. the

Preferably, the detector includes a detector body, a detector upper plate and a detector lower plate, and the detector upper plate and the detector lower plate are respectively clamped with the inner wall of the detector body; the detector upper plate passes through The second wire is connected with the high-voltage power supply of the detector, and the lower plate of the detector is grounded through the wire. the

Preferably, the lower electrode plate of the detector includes a stainless steel outer frame and a conductive glass sheet, and the conductive glass sheets are arranged side by side in turn in the stainless steel frame to form a rectangular electrode plate; the area of the rectangular electrode plate is equal to the area of the upper electrode plate of the detector , the upper plate of the detector is made of stainless steel, and its shape is rectangular. In order to detect the collected particles through an optical microscope, spliced conductive glass plates are used instead of conventional stainless steel plates. The stainless steel outer frame plays the role of fixing the glass plates and promoting the uniformity of the current. the

Preferably, the main structure of the charger body is a hollow cylinder, and the top of the upper end of the charger tapers into a cylinder with an inner diameter smaller than the main structure as an air inlet; the top of the lower end of the charger has a square cover plate, and the bottom of the lower end of the charger The gradually expanded hollow cuboid is used as the air outlet, and the area of the air outlet is equal to the area of the hollow cavity circle of the main structure. A flange is processed on the square cover to connect with the detector body; the horizontally arranged hollow cuboid is used as the air outlet, and the area of the air outlet of the cuboid is kept equal to the area of the hollow cavity circle. the

Preferably, several flow equalizing round holes are evenly arranged on the said flow equalizing plate, and the central position of the current equalizing plate is provided with a central round hole for fixing the discharge electrode; the upper end of the discharge electrode is processed with external thread, and is fixed on the current equalizing hole by a nut. The center of the plate, and the lower end is suspended in the center of the ground electrode of the charger. the

Preferably, the detector body is rectangular, its left end is connected to the square cover plate at the lower end of the charger through a raised flange, and the right end of the detector is tapered to a cylinder with an inner diameter smaller than the detector body as the detector outlet. The outlet of the detector is connected with the induced fan through a pipeline; the second flowmeter is arranged on the pipeline between the outlet of the detector and the induced fan. the

Preferably, the particle generating device is a particle generator, an automatic sampling device or a blast type particle generator; the high-voltage power supply of the charger is a high-voltage direct current power supply, a pulse power supply or a high-frequency power supply, and the high-voltage power supply of the detector is Negative DC high voltage power supply. the

The upper end of the charger adopts insulating materials, such as polytetrafluoroethylene, plexiglass, ceramics and other insulating materials. The outer opening of the upper end of the charging device is used to pass through the first wire (high-voltage wire), and there is a groove for fixing the equalizing plate inside, and the lower part is processed with internal threads; the grounding electrode of the charging device (the middle part of the charging device) is made of stainless steel. Both ends are processed with external threads for connection; the lower end of the charger is processed with internal threads; the grounding electrode of the charge is connected with the internal threads at the upper and lower ends of the charge through the external threads at both ends. The upper end of the charging device, the grounding electrode of the charging device and the lower end of the charging device are connected by threads. After the connection, the diameters of the inner cylindrical cavities are the same to form a charging device body whose main structure is a hollow cylinder. The circular area of the hollow cavity of the main structure is equal to the area of the air outlet in the horizontal direction at the lower end of the charger, so as to ensure the constant flow rate of the air in the charger. the

The flow equalizer is made of polytetrafluoroethylene, plexiglass, ceramics and other insulating materials; the discharge electrode is made of stainless steel and has a cylindrical structure. The upper end of the discharge electrode is processed with external threads and fixed in the center of the flow equalizer by nuts. The lower end is suspended in the center of the ground electrode, and the upper end of the discharge electrode is connected to a negative high-voltage DC power supply through the first wire, so that the particle flow is charged through corona discharge. The air outlet at the lower end of the charger is made of plexiglass, and its upper part is a hollow cylinder with a square cover plate. The upper center of the hollow cylinder is processed with an internal thread to connect with the discharge stage, and the square cover plate is processed with a flange and a detection The lower part gradually expands into a horizontally arranged hollow cuboid as the air outlet, keeping the area of the air outlet equal to the area of the hollow cavity circle of the upper hollow cylinder. the

The detector body is made of plexiglass, and the whole is rectangular, which is used to guide the air flow in the detector; the upper plate of the detector is made of stainless steel, and a hole is opened on the detector body to pass through the second wire, and the upper plate of the detector is made of stainless steel. Connect the detector high-voltage power supply through the second wire, which is used to generate a uniform electric field with the parallel detector lower plate; the detector lower plate adopts a stainless steel outer frame, and the inside of the frame is engraved with a fixing groove to fix the conductive glass sheet; The lower plate of the detector is grounded, which is not only used to generate a uniform electric field with the upper plate of the detector, but also used to collect particles to achieve the purpose of collection and detection. The upper polar plate of the detector and the lower polar plate of the detector are snapped into the inner wall of the detector body respectively, so as to facilitate the replacement of the upper and lower polar plates of the detector. the

The induced fan is used to generate a uniform air flow in the detector, so that the flow of particles flowing out of the charger is consistent with the air flow velocity, so that it is relatively static. the

The gas cylinder can be a common compressed gas cylinder, which is used to give airflow, and the airflow mixes with the particles and enters the charger to charge the particles; an air cylinder can be used, which can also be used to adjust the atmosphere and humidity. the

Preferably, a PIV optical detection system is also provided outside the detector. The particle movement between the two polar plates in the tester can be photographed, which is more intuitive, and the results such as the average charge of the particle flow can be directly obtained by processing and analyzing the photographed results. the

In the particle charge measurement device of the utility model, the particles enter the charge device from the air inlet of the charge device with the positive air flow, charge in the corona area in the middle of the charge device, and then enter the uniform electric field of the detector through the air flow outlet at the lower end of the charge device ;Particles move at a uniform speed in a uniform electric field, and are finally collected by the lower plate of the detector; Uniform motion in air flow. Finally, by taking out the conductive glass sheet in the lower plate of the detector, observe the position and particle size of the particles with an optical microscope, and analyze the force of the particles to obtain the horizontal movement distance of the particles, and calculate the charge amount of each particle. the

The utility model has simple structure and reasonable design, and can accurately measure the charging amount of each single particle in the electrostatic precipitator, thereby studying the charging mechanism of the particles of the electrostatic precipitator; it is helpful for the design and research of the electrostatic precipitator system, thereby improving the electrostatic precipitator. Dust removal efficiency can effectively control the emission of particulate matter in coal-fired flue gas. the

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic structural view of the utility model charger;

Fig. 3 is the structural representation of polar plate of the utility model detector bottom;

Fig. 4 is a schematic diagram of the structure of the lower end of the charger of the present invention;

1. Detector body 2. Detector lower plate 3. Detector outlet 4. Induced fan 5. Detector upper plate 6. Detector high voltage power supply 7. Charger high voltage power supply 8. Charger upper end 9. Current sharing plate 10. Charger discharge electrode 11. Charger ground electrode 12. Charger lower end 13. Particle generator 14. Gas cylinder 15. Airflow inlet 16. Airflow outlet 17. Groove 18. Stainless steel frame 19. Conductive glass sheet 20. Square cover 21. First lead 22. Second lead 23. Hollow cylinder with square cover 24. First flow meter 25. Second flow meter.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model. the

With reference to Fig. 1～4, a kind of particle charge measuring device comprises gas cylinder 14, particle generating device 13, charger, detector and induced draft fan 4 connected in sequence, between described gas cylinder 14 and particle generating device 13 A first flow meter 24 is provided, and a second flow meter 25 is arranged between the detector and the induced draft fan 4; the charger is arranged at the left end of the detector, and the right end of the detector communicates with the induced draft fan through a pipeline; A wire 21 is connected to the high-voltage power supply 7 of the charger, and the detector is connected to the high-voltage power supply 6 of the detector through a second wire 22 . the

The charger includes the upper end 8 of the charger, the middle part of the charger formed by the ground electrode 11 of the charger, the lower end 12 of the charger, the equalizer plate 9 and the discharge electrode 10, the upper end 8 of the charger, and the middle part of the charger formed by the ground electrode 11 of the charger 1. The lower ends 12 of the charging device are connected by threads to form the charging device body; the equalizing plate 9 is arranged in the groove 17 between the upper end 8 of the charging device and the grounding electrode 11 of the charging device, and the discharge electrode 10 is fixedly connected with the current equalizing plate 9, The discharge electrode 10 is connected to the high-voltage power supply 7 of the charging device through the first wire 21; the upper end 8 of the charging device is provided with an air inlet 15, and the lower end 12 of the charging device is provided with an air outlet 16 in the horizontal direction. the

The upper end 8 of the charging device is made of polytetrafluoroethylene material, and the upper end 8 of the charging device has an external opening for passing through the first wire (high-voltage wire), and a groove 17 for fixing the equalizing plate is opened inside, and an internal thread is processed at the lower part; The ground electrode 11 (the middle part of the charging device) is made of stainless steel, and its upper and lower ends are processed with external threads for connection; the lower end 12 of the charging device is processed with internal threads; Internally threaded fit connection. The upper end 8 of the charging device, the grounding electrode 11 of the charging device and the lower end 12 of the charging device are connected by threads. After the connection, the diameters of the inner cylindrical chambers are the same to form a charging device body whose main structure is a hollow cylinder. the

The flow equalizer 9 is made of polytetrafluoroethylene, and several flow equalization round holes are evenly arranged on the flow equalizer, and the central position of the flow equalizer is provided with a central round hole for fixing the discharge electrode; the discharge electrode 10 adopts It is made of stainless steel and has a cylindrical structure. The upper end of the discharge electrode 10 is processed with external threads, and is fixed in the center hole of the flow equalizer 9 through a nut. The lower end is suspended in the center of the ground electrode 11 of the charger. A negative high voltage DC power supply is connected to charge the stream of particles by corona discharge. The air outlet 16 at the lower end 12 of the charger is made of plexiglass, and its upper part is a hollow cylinder 23 with a square cover plate 20. The upper center of the hollow cylinder 23 is processed with an internal thread to connect with the discharge stage 10. The square cover plate 20 The upper part is processed with a flange to connect with the detector body 1; the lower part gradually expands into a horizontally arranged hollow cuboid as the air outlet 16, and the area of the air outlet 16 is kept equal to the area of the hollow cavity circle of the upper hollow cylinder, so as to ensure the flow rate of the air in the charger constant. the

The detector includes a detector body 1, a detector upper plate 5 and a detector lower plate 2, and the detector upper plate 5 and the detector lower plate 2 are engaged with the inner wall of the detector body 1 respectively; the detector upper plate 5 is connected to the detector high-voltage power supply 6 through the second wire 22, and the detector lower plate 2 is grounded through the wire. the

The lower electrode plate 2 of the detector comprises a stainless steel frame 18 and a conductive glass sheet 19, and the conductive glass sheet 19 is arranged side by side in turn in the stainless steel outer frame 18 to form a rectangular electrode plate; the area of the rectangular electrode plate is the same as that of the detector upper electrode plate 5 The areas are equal. the

The detector body 1 is made of plexiglass, which is rectangular as a whole, and is used to guide the air flow in the detector; the upper plate 5 of the detector is made of stainless steel, and the detector body 1 is provided with a hole for passing through the second wire 22 to detect The upper plate 5 of the detector is connected to the high-voltage power supply 6 of the detector through the second wire, and is used to generate a uniform electric field together with the lower plate of the detector in parallel; the lower plate 2 of the detector adopts a stainless steel outer frame 18, and a fixing groove is engraved inside the frame , to fix the conductive glass sheet 19; the detector lower plate 2 is grounded, not only used to generate a uniform electric field with the detector upper plate 5, but also used for particle collection to achieve the purpose of adoption and detection. The detector upper pole plate 5 and the detector lower pole plate 2 are engaged with the inner wall of the detector body 1 respectively, which facilitates the replacement of the detector upper and lower pole plates. the

The left end of the detector body 1 is connected to the square cover plate 20 of the charger through a raised flange, and the right end of the detector body 1 is tapered to a cylinder with an inner diameter smaller than the detector body as the detector outlet 3, and the detector outlet 3 passes through The pipeline is connected with the induced fan 4; the second flow meter 25 is arranged on the pipeline between the detector outlet 3 and the induced fan 4. the

The particle generating device is a blower type particle generator; the high voltage power supply of the charger is a high voltage direct current power supply, and the high voltage power supply of the detector is a negative direct current high voltage power supply. The induced fan is used to generate a uniform air flow in the detector, so that the flow of particles flowing out of the charger is consistent with the air flow velocity, so that it is relatively static. The gas cylinder can be a common compressed gas cylinder, which is used to give the airflow, and the airflow is mixed with the particles and enters the charger to charge the particles; air cylinders can also be used, which can be used to adjust the atmosphere and humidity in addition to giving the airflow. the

The gas flow is given from the gas cylinder 14, and after the flow rate is controlled by the flow meter, it is mixed with the fine particles in the particle generating device 13 and enters the charger. The corona discharge is charged, and then moves horizontally from the gas outlet 16 in the horizontal direction of the lower end 12 of the charger into the detector. The upper pole plate 5 of the detector is connected with the negative DC power supply 6, and the upper pole plate 5 of the detector and the lower pole plate 2 of the detector form a uniform electric field. After the particles enter the uniform electric field, they move in a directional manner, and particles with different sizes or charges have different trajectories, so that the particles separate and land on different positions of the electrode plate 2 under the charger. The position and size of the particles are observed through a microscope, and the horizontal movement distance of the particles is obtained, so as to calculate the charge amount of the particles. During the detection process, the detector adjusts the air volume of the induced draft fan 4 to make the flow rate of the air flow in the detector equal to the flow rate of the air outlet of the charger, so as not to affect the uniform movement of the particles in the air flow. the

As shown in Figure 2 and Figure 4, the upper end 8 of the charger, the ground electrode 11 of the charger and the lower end 12 of the charger are connected by threads. The areas of the rectangles are equal, so as to ensure that the flow rate of the airflow in the charger remains constant. A gap slightly larger than the cylindrical cavity is left in the inner cylindrical cavity of the charging device ground electrode 11 and the charging device upper end 8 to form a groove 17 for placing and fixing the equalizer plate 9 . the

As shown in FIG. 3 , the lower electrode plate 2 of the detector is composed of a stainless steel frame and a conductive glass sheet. In order to detect the collected dust particles through an optical microscope, spliced conductive glass plates are used instead of conventional stainless steel plates; the stainless steel outer frame plays the role of fixing the glass plates and promoting the uniformity of the current. the

In addition, in actual use, a PIV optical detection system can be added to observe the trajectory of particles in the detector. The particle movement between the two polar plates in the tester can be photographed, which is more intuitive, and the results such as the average charge of the particle flow can be directly obtained by processing and analyzing the photographed results. the

The utility model device is used for measuring the charged amount of particulate matter, which specifically includes the following steps:

(1) After the airflow output by the gas cylinder 14 passes through the first flow meter 24 to control the flow rate, it is mixed with particulate matter in the particle generating device 13 and enters the charge through the airflow inlet 15;

(2) After the particulate matter entering the charger is charged by the corona discharge between the discharge electrode 10 and the ground electrode 11 of the charger, it moves horizontally from the air outlet 16 into the detector; where the area of the air outlet and the main structure of the charger The area of the hollow cavity circle is equal;

(3) After the particles enter the detector, they move directionally under the action of the uniform electric field generated between the upper plate 5 of the detector and the lower plate 2 of the detector, and land on different positions of the lower plate 2 of the charger; , adjust the air volume of the induced draft fan 4 through the second flow meter 25, and keep the airflow velocity in the detector equal to the airflow outlet flow velocity of the charger;

(4) Take out the conductive glass sheet 19 in the lower plate 2 of the detector, observe the falling position and particle size of the particles with an optical microscope, and analyze the force of the particles to obtain the horizontal movement distance of the particles, and calculate the charge amount of each particle.

Electric field force: F _E =Eq=Uq/h;

Viscous force: F _η =6πdpμω/Cm;

When the two polar plates of the detection pole are arranged vertically to the ground, the particles are balanced in force in the detector: F _E = F _η ;

Then the driving speed ω=Eq/(3πdμ);

It can be obtained through experiments that the particle movement time: t=L/V ₀ =h/ω;

Then, ω=h*V ₀ /L;

Therefore, the calculation formula of particle charge can be obtained as: q=3πdph2μ/(UL).

In the above formula, E is the electric field strength, q is the charged amount of the particle, h is the distance between the detection plates, μ is the dynamic viscosity, dp is the particle size, Cm is a constant, calculated as 1, L is the horizontal movement distance of the particle, V ₀ is the flow velocity in the horizontal direction of the particle, that is, the flow velocity of the main airflow, and U is the detection electrode voltage.

If the two detection plates are arranged horizontally with the ground, the force balance of the particles is F _E + mg = F _η , and the effect of gravity must be considered.

Claims (9)

1. a particle carrying capacity measurement mechanism, it is characterized in that: described device comprises gas cylinder, particle generating means, charge electric appliance, detector and the air-introduced machine connecting in turn, between described gas cylinder and particle generating means, be provided with first flow meter, between detector and air-introduced machine, be provided with the second flowmeter; Described charge electric appliance is arranged on detector left end, and detector right-hand member is communicated with air-introduced machine by pipeline; Described charge electric appliance is connected with charge electric appliance high voltage source by the first wire, and detector is connected with detector high voltage source by the second wire.

2. particle carrying capacity measurement mechanism according to claim 1, it is characterized in that: charge electric appliance middle part, charge electric appliance lower end, homogenizing plate and discharge electrode that described charge electric appliance comprises charge electric appliance upper end, charge electric appliance earthing pole, consists of, be threaded connection and form charge electric appliance body between charge electric appliance upper end, the charge electric appliance middle part consisting of charge electric appliance earthing pole, charge electric appliance lower end; Homogenizing plate is laid in the groove between charge electric appliance upper end and charge electric appliance earthing pole, and discharge electrode is fixedly connected with homogenizing plate, and discharge electrode is connected with charge electric appliance high voltage source by the first wire; Top, described charge electric appliance upper end is provided with airflow inlet, and charge electric appliance lower end bottom level direction is provided with air stream outlet.

3. particle carrying capacity measurement mechanism according to claim 2, is characterized in that: described detector comprises detector body, detector top crown and detector bottom crown, detector top crown and detector bottom crown respectively with the clamping of detector inner body wall; Detector top crown is connected with detector high voltage source by the second wire, and detector bottom crown is by wire ground connection.

4. particle carrying capacity measurement mechanism according to claim 3, is characterized in that: described detector bottom crown comprises stainless steel housing and electro-conductive glass sheet, and described electro-conductive glass sheet is laid in formation rectangle pole plate in stainless steel housing successively side by side; Described rectangle polar plate area equates with detector top crown area, described detector top crown employing stainless steel, and its shape is rectangle.

5. particle carrying capacity measurement mechanism according to claim 3, is characterized in that: the agent structure of described charge electric appliance body is hollow cylinder, and its top, charge electric appliance upper end tapers to cylinder that internal diameter is less than agent structure as airflow inlet; Its top, charge electric appliance lower end is with square cover plate, and the hollow cuboid that bottom, charge electric appliance lower end flaring is arranged horizontally is as air stream outlet, and air stream outlet area equates with the agent structure hollow cavity area of a circle.

6. particle carrying capacity measurement mechanism according to claim 3, is characterized in that: on described homogenizing plate, be evenly laid with several current-sharing circular holes, homogenizing plate center is provided with for the fixing center hole of discharge electrode; Described discharge electrode upper end threading, is fixed on homogenizing plate central authorities by nut, and lower end is suspended on charge electric appliance earthing pole central authorities.

7. particle carrying capacity measurement mechanism according to claim 5, it is characterized in that: described detector body is rectangle, its left end is connected with the square cover plate of charge electric appliance lower end by protruding flange, detector right-hand member tapers to the cylinder that internal diameter is less than detector body and exports as detector, and described detector outlet is connected with air-introduced machine by pipeline; Described the second flowmeter is arranged on the pipeline between detector outlet and air-introduced machine.

8. particle carrying capacity measurement mechanism according to claim 1, is characterized in that: described particle generating means is particle generator, automatic sampling apparatus or blowing-type particle generator; Described charge electric appliance high voltage source is high-voltage DC power supply, the pulse power or high frequency electric source, and described detector high voltage source is negative dc high voltage power supply.

9. particle carrying capacity measurement mechanism according to claim 1, is characterized in that: described detector outside is also provided with PIV Systems for optical inspection.