CN104165831A - Dust concentration detecting and sensing device - Google Patents
Dust concentration detecting and sensing device Download PDFInfo
- Publication number
- CN104165831A CN104165831A CN201410397497.5A CN201410397497A CN104165831A CN 104165831 A CN104165831 A CN 104165831A CN 201410397497 A CN201410397497 A CN 201410397497A CN 104165831 A CN104165831 A CN 104165831A
- Authority
- CN
- China
- Prior art keywords
- light projector
- passage
- gas channel
- warehouse
- channel
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a dust concentration detecting and sensing device which aims at solving the problems of potential safety hazards and low detection accuracy generated when a suction fan is adopted to suck dust gas into a detection bin. The dust concentration detecting and sensing device comprises a light projector, a photoelectric detecting converter and a detection bin, wherein the detection bin comprises an airflow passage which is through up and down and is arranged in the middle of a bin body; a light projector passage and a photoelectric detecting converter passage which extend inwards and intersect in the airflow passage are arranged on the two sides of the outlet of the airflow passage; the light projector passage is provided with one segment extending forwards to the surface of the bin body; an airflow passage extension tube with an upward opening is mounted at the outlet of the airflow passage, and a PTC ceramic thermistor heater is mounted outside the airflow passage extension tube; the photoelectric detecting converter is mounted at the inlet of the photoelectric detecting converter passage, and the light projector is mounted at the inlet of the light projector passage; a communicating tube with a downward opening is mounted at the outlet of the light projector passage, and a gas collection constant-current cover with a downward opening is mounted at the inlet of the airflow passage.
Description
Technical field
The invention belongs to dust concentration detection technique field, be specifically related to a kind of dust concentration that is applicable to dust harzard operation field and detect sensing device.
Background technology
At mining, metal processing, in the industrial processes such as grain pulverizing and fiber treatment, inevitably can produce as the Rock Powder dirt such as free silica or as magnesium dust, aluminum dust, coal dust, flour dust, the explosive dusts such as staple fibre, these dust granules are suspended in air, can not only cause respirable dust disease, serious harm operating personnel's is healthy, and this explosive dust wherein while reaching certain concentration in air, meet naked light or reach certain temperature, very easily combustion explosion, cause serious industrial accident, therefore very necessary to the detection control of dust.Dust concentration detection sensing device is applicable to have the operation field of dust harzard, as under coal mine, the environment of the relative closure such as medal polish workshop, Flour production workshop, the concentration that can accurately detect continuously dust suspension in production environment to its requirement, meet safety in production requirement, in the time that dust concentration transfinites, start dust falling device work, realize automatic dust measuring depositing dust.
Current known dust detects sensing device in the time that operation field detects dust, is by suction fan, the gas of operating environment to be drawn onto and to detect storehouse and carry out Photoelectric Detection, and suction fan must safety anti-explosive, and impeller strictly seals, and drives with brushless electric machine.Nonetheless, mechanical friction when suction fan operation still may produce high temperature or spark, and the noise of outwardness.Suction fan is rapid wear equipment, and price and maintenance cost are high.With suction fan, the gas that contains dust is forced to be drawn into and detects storehouse, affected by suction fan performance etc., detect dust content in storehouse likely with actual environment in dust content incomplete same, affect the accuracy of dust detection.
Summary of the invention
The object of the invention is the deficiency for above-mentioned prior art, provide a kind of dust detection accuracy raising, performance safety dust concentration reliable and use and maintenance cost reduction to detect sensing device.
The present invention is achieved in that
A kind of dust concentration detects sensing device, comprise light projector, Photoelectric Detection converter and the detection storehouse that darkroom requires that meets being arranged in warehouse, described detection storehouse comprises the gas channel that is arranged on the middle up/down perforation of warehouse, have in the both sides of warehouse upper surface gas channel outlet and extend internally and crossing light projector passage and Photoelectric Detection converter channel in gas channel, the continuation after intersecting in gas channel with Photoelectric Detection converter channel of light projector passage extends to forward warehouse one side surface, the gas channel extension of opening upwards is installed in the exit of warehouse upper surface gas channel, at gas channel extension, automatic thermostatic heater is installed outward, described Photoelectric Detection converter is inserted and secured on the porch of Photoelectric Detection converter channel by the entrance of Photoelectric Detection converter channel that is positioned at warehouse one side surface, described light projector is inserted and secured on the porch of light projector passage by the entrance of light projector passage that is positioned at warehouse opposite side surface, in the exit of warehouse one side light projector passage, the light projector channel connection pipe that Open Side Down is installed.
Angle between described light projector passage and Photoelectric Detection converter channel is the arbitrary numerical value between 80 degree to 120 degree.
Described gas channel is identical with the internal diameter of gas channel extension; The internal diameter of described light projector channel connection pipe is identical with light projector passage.
The gas collection current stabilization cover that Open Side Down is installed in the porch of warehouse lower stream of airflow passage, and gas collection current stabilization cover has horn opening.
Described automatic thermostatic heater is PTC ceramic thermal resistance well heater.
Described PTC ceramic thermal resistance well heater is sheet shape heating element, is fitted on gas channel extension outside surface after the heat conductive insulating layer of interval.
The invention has the beneficial effects as follows:
Described detection storehouse is provided with the gas channel of up/down perforation, the gas channel extension of opening upwards is installed in the exit of gas channel, at gas channel extension, automatic thermostatic heater is installed outward, utilize gas in gas channel extension by gaseous exchange that automatic constant-temperature-heating produced, gas in production on-site environment is entered in detection storehouse continually from the entrance of gas channel and the end opening of light projector channel connection pipe from bottom to top, dust content in gas is identical with production scene, this dust investigating without suction fan, adopt the gas rising of being heated, in vertical gas channel, produce the technological means of gas flow, can be real-time, continuously, detect accurately the dust concentration of production scene, thoroughly remove and adopted suction fan may produce the hidden danger that spark brings to safety in production, eliminate running noises, production cost and maintenance cost are reduced, extend the serviceable life of pick-up unit.
The light projector passage that described detection storehouse arranges in gas channel outlet both sides and Photoelectric Detection converter channel slopes inwardly and intersect in gas channel, light projector passage also has through one section that extends to warehouse outside surface after gas channel.Under Action of Gravity Field, sink landing in dust is detecting storehouse time, most dust can be discharged via light projector channel connection pipe automatically by the outlet of the light projector passage of the entrance of vertical gas channel and inclination, rarely dust deposits in detection storehouse, if while really needing to clear up after working long hours, the entrance by gas channel, that the end opening suitable for reading and light projector channel connection pipe of gas channel extension carries out labor cleaning is also very convenient.
The automatic thermostatic heater that the present invention installs outside gas channel extension adopts PTC ceramic thermal resistance well heater, this heating appliances have constant temp. warming, the flames of anger, thermal conversion rate high, be subject to supply voltage to affect the advantages such as minimum, natural life-span is long, be highly suitable for working environment of the present invention, safe and reliable, easy to use.As long as the present invention is to form gaseous exchange in gas channel and gas channel extension to the requirement of PTC sensitive ceramic resistor heater power size, therefore, required heating power is little, saves energy.
Because PTC sensitive ceramic resistor well heater is arranged on outside gas channel extension, gas produces gaseous exchange after being heated by continuous constant temperature through tube wall in gas channel extension, and the gas of gas channel stage casing and hypomere is not heated, the air-flow undisturbed that operates steadily herein, under Action of Gravity Field, dust can normally sink to landing and discharge, in the light projector passage that communicates adjacent with gas channel and Photoelectric Detection converter channel, seldom have too dust deposit, the error detection that the anaclasis causing because of dust deposit can effectively prevent light projector light projector time produces, make pick-up unit stable and reliable working performance.
Install light projector channel connection pipe in the exit of light projector passage additional, make original extend with regard to longer light projector passage farther, optical length in the time of light projector light projector, darkroom effect is better.The end opening of light projector channel connection pipe is another air intake opening of gas channel, also be another dust settling escape hole, the internal diameter of light projector channel connection pipe is identical with light projector passage, can promote the steady convection current of gas in gas channel, reduces and detects dust deposit in storehouse.
Described gas channel adopts identical internal diameter with gas channel extension, can make gas flow speed stability in gas channel and gas channel extension.
In the porch of warehouse lower stream of airflow passage, gas collection current stabilization cover is installed, for reducing the unsettled impact of ambient air flow, can be made air-flow more steady in the time that gas channel entrance enters detection storehouse.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Be described in further detail the present invention below in conjunction with drawings and Examples.
As shown in Figure 1:
A kind of dust concentration detects sensing device, comprise light projector 3, Photoelectric Detection converter 8 and be arranged at the detection storehouse in warehouse 1, the warehouse 1 is here one and has certain thickness derby, detecting storehouse is the cavity that is positioned at warehouse 1, detect storehouse inner wall surface and have the coating that prevents light reflection, or adopt the surface processing of turning blue, so just form usually said darkroom.
The composition that detects storehouse comprises the gas channel 4 that is arranged on warehouse 1 middle part up/down perforation, and export extending internally of both sides and in the interior crossing light projector passage 2 of gas channel 4 and Photoelectric Detection converter channel 9 at warehouse 1 upper surface gas channel 4, the entrance of light projector passage 2 is at the left surface of warehouse 1, the entrance of Photoelectric Detection converter channel 9 is at the right flank of warehouse 1, and gas channel 4 entrances are at warehouse 1 lower surface, gas channel 4 exports at warehouse 1 upper surface, light projector passage 2 is extending to forward warehouse 1 right lateral surface with Photoelectric Detection converter channel 9 in the interior crossing rear continuation of gas channel 4, here be the outlet of light projector passage 2, this section of light projector passage 2 belongs to a part that detects storehouse.Gas channel 4 can be that casting time is reserved in the through hole in derby, can be also the through hole that drilling processes, and it is the through hole of 24 millimeters that diameter is processed in for example drilling.Light projector passage 2 and Photoelectric Detection converter channel 9 are also to produce and generate as method, and diameter is determined according to the needs of light projector 3 and Photoelectric Detection converter 8.Above-mentioned each passage is all made into platform in entrance, the exit on warehouse 1 surface, and according to install connect need to process internal thread or counterbore.
Exit at warehouse 1 upper air passage 4 is processed with counterbore, and by clearance fit setting-in and be welded with the gas channel extension 5 of opening upwards, the internal diameter of gas channel extension 5 is identical with gas channel 4.In the time that the exit of gas channel 4 is processed with internal thread, gas channel extension 5 adopts and is threaded with gas channel 4.
The automatic thermostatic heater 6 of installing on gas channel extension 5 outside surfaces is PTC ceramic thermal resistance well heaters of low power shape.PTC ceramic thermal resistance heater power is elected 2～5w left and right as, and operating voltage exchanges 110～220V, electric current setting range 20～50ma, can be from the environment temperature of motion tracking present position, heated at constant temperature, to higher 4～8 DEG C than environment temperature, both can produce gaseous exchange, and temperature rise is not high again.The heat conductive insulating layer 7 at interval between PTC ceramic thermal resistance well heater 6 and gas channel extension 5 tube walls, with 3 layers of mica-sheet insulation that 0.5mm is thick, adopt heat conductive silica gel coating successively to bond together, then be fitted in together with PTC ceramic thermal resistance well heater 6 on gas channel extension 5 outside surfaces, finally reinforce with 2 to 4 screws again.
The gas collection current stabilization cover 11 that Open Side Down is installed in the porch of warehouse 1 lower stream of airflow passage 4.Gas collection current stabilization cover 11 adopts the stamping parts of lamp cover shaped, its horn opening is downward, the internal diameter of gas collection current stabilization cover 11 top passageway mouths is identical with gas channel 4 or slightly large, and gas collection current stabilization cover 11 tops and gas channel 4 entrance peripheral surfaces fit, with 2 to 4 fastening location of screw.
If what process on the outside surface of gas collection current stabilization cover 11 upper channel mouths is external thread, the porch of gas channel 4 is processed with internal thread, gas collection current stabilization cover 11 adopts and is threaded with gas channel 4, and the internal diameter of gas collection current stabilization cover 11 upper channel mouths is identical with gas channel 4.
Light projector 3 has barrel-type casing 302 and a bonnet 301, Projecting Lamp is arranged in light projector barrel-type casing 302, barrel-type casing 302 front portions have a light delivery outlet, barrel-type casing 302 rear portions are threaded connection bonnet 301, on bonnet 301 peripheries, be processed with external thread, light projector 3 is threaded connection the porch that is arranged on warehouse 1 left side light projector passage 2, and the power lead of Projecting Lamp is drawn by the wire guide on bonnet 301.The present embodiment is selected the ultrashort wave (USW) Projecting Lamp of wavelength 600～800 nanometers, and operating voltage is direct current 5V, electric current setting range 10～15ma.
Photoelectric Detection converter 8 has storehouse lid 801 after barrel-type casing 802 and, photoelectric receiving tube is arranged in Photoelectric Detection converter barrel-type casing 802, barrel-type casing 802 front portions have a light-receiving mouth, barrel-type casing 802 rear portions are threaded connection rear storehouse lid 801, rear storehouse is covered on 801 peripheries and is processed with external thread, Photoelectric Detection converter 8 is threaded connection the porch that is arranged on warehouse 1 right side Photoelectric Detection converter channel 9, and the power lead of Photoelectric Detection converter 8 and data line are drawn by the wire guide on rear storehouse lid 801.The operating voltage of the present embodiment Photoelectric Detection converter 8 is direct current 12V, electric current setting range 12～18ma.
Exit at warehouse 1 right side light projector passage 2 is processed with counterbore, and by clearance fit setting-in and be welded with the light projector channel connection pipe 10 that Open Side Down, the internal diameter of light projector channel connection pipe 10 is identical with light projector passage 2.Install light projector channel connection pipe 10 additional, make original farther that just longer light projector passage 2 extends, optical length in the time of light projector 3 light projector, darkroom effect is better.The end opening of light projector channel connection pipe 10 is another dust settling escape holes outside gas channel 4 entrances, for the dust deposit that prevents from accumulating over a long period and forming, the error detection that the anaclasis causing because of dust deposit while avoiding light projector 3 light projector produces, it or another air intake opening of gas channel 4, can promote the smooth flow of gas channel 4 interior gases.
Angle between light projector passage 2 and Photoelectric Detection converter channel 9 is the arbitrary numerical value between 80 degree to 120 degree.Light projector passage 2 and Photoelectric Detection converter channel 9 slope inwardly and are interior crossing at gas channel 4, make light projector passage 2 and Photoelectric Detection converter channel 9 and horizontal line keep an inclination angle, can greatly reduce dust detecting the deposition in these two passages in storehouse, reduce the impact of dust deposit on light projector and light-receiving.In the time that the angle between light projector passage 2 and Photoelectric Detection converter channel 9 is tending towards little value (as 80 degree), light projector passage 2 and Photoelectric Detection converter channel 9 are tending towards large value with horizontal inclination angle, prevent the better effects if of dust deposit.
On warehouse 1, be also processed with 4 connecting holes, for the location and installation of this device.
The invention is not restricted to above-described embodiment, the present invention can also expand similar embodiment, for example: the warehouse that dust concentration detects sensing device is hot investment casting part, its centre is reserved with cavity, cavity can be the shape such as circular or oval, be reserved with the structure corresponding with essential features of the present invention simultaneously, form corresponding passage, there is corresponding import and outlet; Again for example: by changing outer shape and the connected mode of warehouse, gas channel is extended on warehouse, saved gas channel extension, the structure of this change remains the structure identical with essential features essence of the present invention.Structure of the present invention is not subject to the restriction of manufactured materials, for example, can also adopt engineering plastics as the material of manufacturing warehouse, and the present invention is not subject to the restriction of manufacture method yet.
In the time that the present invention is used for having the operation field of dust harzard, in the PTC ceramic thermal resistance well heater 6 continuous constant temperature work of gas channel extension 5 outer installations, by the gas in gas channel extension 5 tube wall heating tubes, form gaseous exchange from bottom to top, the gas that contains dust causing in operating environment is entered endlessly and is detected in storehouse by gas channel 4 entrances via gas collection current stabilization cover 11, also have another part gas to supplement to enter by 2 outlets of light projector passage via light projector channel connection pipe 10 detects in storehouse simultaneously, the direction of the flow direction of uprising gas as shown in arrow in accompanying drawing, the light that Projecting Lamp in light projector 3 sends sees through light delivery outlet and projects forward, utilize this light irradiating and detecting storehouse to contain the gas of dust, the dust granules suspending in gas produces reflection light point, reflection light point is directly proportional to dust content, photoelectric receiving tube in Photoelectric Detection converter 8 converts faint electric signal to after receiving the particle reflected light detecting in storehouse, by carrying out the technical finesse such as signal amplification and signal conversion, final formation control signal, export through data line, start the watering being associated, the dust falling devices such as spraying.
The present invention has abandoned suction fan and has sucked dust to the method that detects storehouse, the technical measures that adopt cross-ventilation automatically to suck, avoid the series of problems that uses suction fan to bring, the present invention adopts cross-ventilation mode that the dusty gas in working environment is sucked, therefore detect the dust content of gas in storehouse with extraneous identical, in the time that extraneous dust content changes, the gas that enters continually detection storehouse can reflect this variation in time.Use heating element heating to arrange in order to ensure air to produce convection current, required heat temperature raising value is little.Production cost of the present invention declines, and there is no maintenance cost, and safe and reliable, dust testing result is more accurate, is applicable to the various operation places with dust harzard.
Claims (6)
1. a dust concentration detects sensing device, comprise light projector (3), Photoelectric Detection converter (8) and be arranged at the detection storehouse that darkroom requires that meets in warehouse (1), it is characterized in that: described detection storehouse comprises the gas channel (4) that is arranged on the middle up/down perforation of warehouse (1), have in the both sides of warehouse (1) upper surface gas channel (4) outlet and extend internally and crossing light projector passage (2) and Photoelectric Detection converter channel (9) in gas channel (4), light projector passage (2) continuation after intersecting in gas channel (4) with Photoelectric Detection converter channel (9) extends to forward warehouse (1) one side surface, the gas channel extension (5) of opening upwards is installed in the exit of warehouse (1) upper surface gas channel (4), automatic thermostatic heater (6) is installed outside gas channel extension (5), described Photoelectric Detection converter (8) is inserted and secured on the porch of Photoelectric Detection converter channel (9) by the entrance of Photoelectric Detection converter channel (9) that is positioned at warehouse (1) one side surface, described light projector (3) is inserted and secured on the porch of light projector passage (2) by the entrance of light projector passage (2) that is positioned at warehouse (1) opposite side surface, in the exit of warehouse (1) one side light projector passage (2), the light projector channel connection pipe (10) that Open Side Down is installed.
2. a kind of dust concentration according to claim 1 detects sensing device, it is characterized in that: the angle between described light projector passage (2) and Photoelectric Detection converter channel (9) is the arbitrary numerical value between 80 degree to 120 degree.
3. a kind of dust concentration according to claim 1 detects sensing device, it is characterized in that: described gas channel (4) is identical with the internal diameter of gas channel extension (5); The internal diameter of described light projector channel connection pipe (10) is identical with light projector passage (2).
4. a kind of dust concentration according to claim 1 detects sensing device, it is characterized in that: the gas collection current stabilization cover (11) that Open Side Down is installed in the porch of warehouse (1) lower stream of airflow passage (4), and gas collection current stabilization cover (11) has horn opening.
5. a kind of dust concentration according to claim 1 detects sensing device, it is characterized in that: described automatic thermostatic heater (6) is PTC ceramic thermal resistance well heater.
6. a kind of dust concentration according to claim 5 detects sensing device, it is characterized in that: described PTC ceramic thermal resistance well heater (6) is sheet shape heating element, after interval heat conductive insulating layer (7), be fitted on gas channel extension (5) outside surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397497.5A CN104165831A (en) | 2014-08-10 | 2014-08-10 | Dust concentration detecting and sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397497.5A CN104165831A (en) | 2014-08-10 | 2014-08-10 | Dust concentration detecting and sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104165831A true CN104165831A (en) | 2014-11-26 |
Family
ID=51909744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410397497.5A Pending CN104165831A (en) | 2014-08-10 | 2014-08-10 | Dust concentration detecting and sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104165831A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001088A (en) * | 2018-05-30 | 2018-12-14 | 绵阳涪泽恩达科技有限公司 | Vertical layout osmosis type kitchen special photoelectric smoke detector |
| CN109099486A (en) * | 2018-09-26 | 2018-12-28 | 华帝股份有限公司 | Fume exhaust fan |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | A kind of non-maintaining laser dust concentration sensor |
| CN112098281A (en) * | 2020-08-12 | 2020-12-18 | 深圳市汇投智控科技有限公司 | Laser dust sensor |
-
2014
- 2014-08-10 CN CN201410397497.5A patent/CN104165831A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001088A (en) * | 2018-05-30 | 2018-12-14 | 绵阳涪泽恩达科技有限公司 | Vertical layout osmosis type kitchen special photoelectric smoke detector |
| CN109001088B (en) * | 2018-05-30 | 2019-07-02 | 绵阳涪泽恩达科技有限公司 | Vertical layout osmosis type kitchen special photoelectric smoke detector |
| CN109099486A (en) * | 2018-09-26 | 2018-12-28 | 华帝股份有限公司 | Fume exhaust fan |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | A kind of non-maintaining laser dust concentration sensor |
| CN112098281A (en) * | 2020-08-12 | 2020-12-18 | 深圳市汇投智控科技有限公司 | Laser dust sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104165831A (en) | Dust concentration detecting and sensing device | |
| CN204757611U (en) | Novel grain dryer | |
| CN105374154A (en) | Point type active smoke detector with or without gas production tube, and air sampling system | |
| CN104360419A (en) | Multi-parameter sensing module | |
| CN204228984U (en) | Multi-parameter sensing module | |
| CN105371332B (en) | The sensing of intelligent temperature control ion is superpower to inhale to the greatest extent integrated kitchen range | |
| CN105884212B (en) | A kind of energy-saving long-life UV curing oven and its control method | |
| CN105372397A (en) | Simulating experiment device of goaf spontaneous ignition | |
| CN104785038A (en) | Control apparatus and control method for inlet temperature of bag-type dust collector used for furnace | |
| CN104685301B (en) | Heat exchange ventilating device | |
| CN206930439U (en) | A kind of gas turbine vertical air inlet air filtration test device | |
| CN109079408A (en) | A kind of welding post control system | |
| CN205939575U (en) | Inhalable particle detection device | |
| CN106662354A (en) | Air conditioning system with dust reduction and smoke discharge function | |
| RU2014141790A (en) | ADJUSTABLE FOR INSTALLATION ON THE WALL OF FURNACE ON GRANULATED FUEL | |
| CN205676366U (en) | A kind of energy-saving long-life UV curing oven | |
| CN206576217U (en) | Novel foodstuff dehydration dryer | |
| CN206095876U (en) | Negative pressure formula compound sensor and new fan | |
| CN207096046U (en) | A kind of low concentrations of particulates thing measuring instrument suitable for wet flue gas | |
| CN204321195U (en) | A kind of debinding furnace | |
| CN105864840A (en) | Over-the-range microwave oven with an integrated duct | |
| CN209182951U (en) | A kind of intelligent fire optical detector of fire smoke for the detection that can periodically cruise | |
| CN205102326U (en) | Air supplying device | |
| CN206724326U (en) | The accurate EGR of pure air | |
| CN208921586U (en) | A kind of powder particle granularity on-line measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |