62results about How to "Meet measurement needs" patented technology

The utility model belongs to the field of spectrum confocal measurement, and particularly discloses a spectrum confocal measurement device which comprises an area array illumination assembly, a light splitting element, a dispersion objective lens assembly and a multi-CCD area array imaging assembly. The light splitting element transmits the surface incident light output by the area array illumination assembly to the dispersion objective lens assembly; the dispersion objective lens assembly disperses and unfolds light with different wavelengths in a plurality of wavebands in transmitted incident light, so that the light with different wavelengths is focused at different heights of an object to be measured at the same time, and reflected light with at least one waveband reflected by the surface of the object to be measured is received and emitted to the light splitting element; the light splitting element reflects the reflected light to the multi-CCD area array imaging assembly; the multi-CCD area array imaging assembly comprises a plurality of light splitting assemblies and a plurality of imaging assemblies, the plurality of light splitting assemblies divide reflected light into multiple paths of wave band light in different wavelength ranges, and the plurality of imaging assemblies receive the multiple paths of wave band light and carry out imaging. According to the utility model, wide-range, high-efficiency and high-precision detection can be realized.

The invention belongs to the field of acoustic speed measurement, and particularly relates to a combined cycle waste heat boiler inlet flue gas flow velocity acoustic monitoring system and method, and the system comprises a pneumatic sound source device which is used for generating a pneumatic sound wave signal and transmitting the pneumatic sound wave signal into a flue gas pipeline; the sensor system is used for collecting pneumatic sound wave signals sent by the pneumatic sound source device and obtaining downwind propagation sound wave signals and upwind propagation sound wave signals through the pneumatic sound wave signals; the pneumatic sound wave signal processing system is electrically connected with the sensor system and is used for calculating the gas flow rate on a corresponding path according to the downwind propagation sound wave signal and the upwind propagation sound wave signal collected by the sensor system and displaying a measurement result; the sensor system is provided with one transmitter and two receivers, the propagation velocities of sound in downstream and countercurrent can be obtained at the same time, the influence of sound velocity change on a time difference method is avoided by using the principle that the sound velocity is different in downstream and countercurrent conditions, and the requirement for measuring the outlet flow velocity of the gas turbine is met.

The invention discloses a part size detection method based on image recognition, which comprises the following steps of: generating a plurality of two-dimensional images with different shadow shapes, recognizing and extracting boundary information and shadow information of a part in the two-dimensional images to obtain the shadow information and normal direction of the part in the two-dimensional images, constructing a three-dimensional image of the part, and detecting the size of the part according to the three-dimensional image. Therefore, the accurate size information of the part can be accurately recognized, the part size measurement precision is improved, the measurement efficiency is further improved, the continuously changing measurement requirements are met, and meanwhile, the normal direction is obtained by recognizing and extracting the boundary information and shadow information of the part in the two-dimensional image, so that the measurement accuracy is improved. And the normal direction information forms a normal field of the part surface, the inclination degree and the shape change of the part surface are known, and the orientation and the concave-convex condition of the part surface are determined, so that the precision of subsequently constructing a part three-dimensional model is further improved, and the measurement efficiency is further improved.

The invention discloses a preparation method of a large-area decoupling type fiber grating sensor based on an island bridge structure, and the method comprises the steps: firstly carrying out the peripheral pre-stretching of an elastic substrate, and then bonding a plurality of carbon fiber composite sheets which are arranged in a matrix manner on the elastic substrate in a pre-stretching state, a fiber grating and a fiber grating wrapped by glass fiber are respectively bonded and fixed on the two rows of fiber positioning grooves of each row of carbon fiber clad sheets, each fiber grating is provided with a grating point in the groove of each carbon fiber clad sheet, and each groove of each carbon fiber clad sheet is filled and cured; finally, after the elastic substrate is pre-stretched and released, the top surface of the elastic substrate is covered with an elastic top sealing layer, and therefore the large-area decoupling type fiber grating sensor is formed. The large-area decoupling fiber grating sensor prepared by the invention can still obtain a high-precision measurement result when facing high mechanical stress and dynamic deformation.

The invention discloses an intermediate-frequency surface shape white light interference splicing measurement method based on polynomial filtering. The method comprises the following steps: carrying out white light interference splicing measurement on an X-ray plane mirror to obtain a group of interference measurement surface shape results with overlapped adjacent sub-aperture space positions; fitting the surface shape result of each sub-aperture by using a Legendre polynomial to obtain a polynomial coefficient under a preset order; fitting according to a polynomial coefficient to generate a fitting surface shape of a corresponding order, and subtracting the fitting surface shapes of all orders from the measurement result to obtain a group of surface shape results subjected to Legendre polynomial filtering; and splicing the filtered shape results according to a least square algorithm to obtain a final measurement result. The method aims at meeting the splicing measurement of sub-nanometer PV precision required by the intermediate-frequency surface shape error detection of the X-ray plane mirror, the least square optimization splicing method is used, the method is not limited by the low-frequency characteristic of the measurement error of the white light interferometer, and the precision and flexibility of the splicing measurement are improved.

The utility model provides a kind of wheel riser area deformation measurement equipment, belong to wheel processing technical field, including workbench, and the positioning part for positioning wheel is respectively provided with detection mechanism on workbench;Detection mechanism includes support column, rotating component, translation component and detection component, support column is vertically fixed in the upper end surface of workbench, rotating component is set to the top of support column, translation component is set to rotating component, detection component is installed on translation component;Positioning part includes positioning column, positioning column is vertically set to the upper end surface of workbench and located in the side of support column, positioning column is positioned in the below of detection component with the spoke surface of wheel upwards for wheel.This wheel riser area deformation measurement equipment provided by the utility model fundamentally solves the problem of poor adaptability of existing equipment, so that the equipment can meet the measurement needs of various specifications of wheel, with wide versatility and high flexibility.

The application provides a VISA library running method and device based on an ARM embedded platform, and relates to the technical field of testing and measurement, and comprises the following steps: initializing a layered architecture of a VISA library; the layered architecture of the VISA library comprises an application layer, an API interface layer, a core logic layer, a hardware abstraction layer and a driver layer; discovering and establishing a communication session connection with at least one measuring instrument; wherein a session attribute and a preset attribute associated with a data reading operation are included in a session structure body of the communication session; setting at least one preset attribute for the VISA library; sending at least one control command to a target measuring instrument; wherein the target measuring instrument comprises at least one; reading response data for the control command from the target measuring instrument based on the preset attribute and writing the response data into a buffer; and closing the communication session established with the at least one measuring instrument, so as to alleviate the technical problem that the VISA library is difficult to meet the requirements of an embedded application scenario in high performance.

The invention discloses a current measuring device with fA-level precision. The current measuring device comprises a current sense circuit unit, a pre-voltage amplifier unit, a precision ADC circuit unit, an isolation interface circuit unit and a high-stability reference circuit unit, and the high-stability reference circuit unit provides high-stability reference voltage for ADC conversion and analog circuit comparison; the low-noise power supply unit is used for providing a stable low-noise power supply for any other units; the LO signal interface unit is connected to a voltage source or an analog ground according to a measurement mode; and the HI signal interface unit is directly connected to the equipment to be tested and is used for measuring the current passing through the DUT. The current sensing resistor is a core component of a current sense circuit and generally has a very high resistance value so as to ensure that a voltage signal which is strong enough is generated when small current is measured, so that amplification processing of a post-stage circuit is facilitated, and the signal-to-noise ratio is improved.

The utility model provides an anchor cable drilling angle measuring device which comprises three measuring rods which are arranged side by side in parallel and are adjustable in length, a locking mechanism which is arranged on the measuring rods and is used for fixing the length of the measuring rods, and a plurality of positioning pieces which are arranged along the length direction of the measuring rods, the adjusting mechanism is connected to the end portion of the measuring rod and used for adjusting the diameter of the positioning piece, the protractor is arranged at the end portion of the adjusting mechanism in the axis direction of the measuring rod, and the plumb bob assembly is connected with the center point of the protractor. A stable system is formed among the measuring rod, the positioning piece and the drill hole, it can be ensured that the measuring device and the drill hole are in a coaxial state, measurement errors caused by shaking or deviation of the device are effectively prevented, the accuracy and reliability of measurement are improved, the protractor is used in cooperation with the plumb bob assembly, and the measuring accuracy and reliability are improved. The angle measurement is more visual and accurate, the operation is simple, and the measurement working efficiency is improved.

The utility model discloses a fast locking adjustable building measuring scale, and specifically relates to the measuring scale technology field, the fast locking adjustable building measuring scale comprises a first scale body, one side of the first scale body is fixedly provided with a connecting column, the surface of the connecting column is sleeved with a second scale body, two ends of the connecting column are fixedly provided with limiting discs, and one side of the second scale body is provided with a locking mechanism. The locking mechanism comprises an L-shaped fixing block fixedly arranged on one side of the second ruler body, a sliding groove is formed in the L-shaped fixing block, a cross-shaped sliding block is arranged in the sliding groove in a sliding mode, a fixing plate is fixedly arranged at the bottom of the cross-shaped sliding block, and a limiting rod is fixedly arranged in the fixing plate. According to the utility model, the angle between the first ruler body and the second ruler body can be flexibly adjusted to adapt to different measurement scenes, unlocking and locking can be rapidly realized, the angle stability during measurement is ensured, and the practicability and reliability of the measuring ruler in the aspect of length adjustment are enhanced.

The utility model provides an external gate opening measuring device for a hydraulic hoist, which comprises a first fixed slide rail hoop, the first fixed slide rail hoop is fixedly connected with the front end of a cylinder body of the hydraulic hoist, and an external sliding opening device is selectively mounted on the first fixed slide rail hoop in a matched manner through a slide rail ring. A rope collecting device is installed at the front end of the external sliding opening device and fixedly connected with an extension rod through a steel wire rope, the bottom of the extension rod is installed on a second fixed sliding rail hoop in a sliding fit mode, and the second fixed sliding rail hoop is fixedly connected with the front end of a hydraulic hoist push-pull rod. The external opening degree measuring device has the advantages that the external opening degree measuring device can be longitudinally and transversely adjusted by adjusting the installation position, the problem of accurate measurement of the opening degree of the gate can be effectively solved, reliability is improved, and meanwhile due to the fact that the opening degree measuring device is external, maintenance time can be effectively shortened.

The utility model relates to municipal works pipe jacking construction technology field discloses a kind of folding linear pipe jacking line shape measuring devices, including clamping mechanism, folding ruler, adjustable target and the telescopic fixing mechanism for locking the included angle between clamping mechanism and folding ruler;The clamping mechanism is used to clamp the measuring device in the end of pipe wall two sides of construction pipe jacking;Folding ruler one end articulates clamping mechanism;Folding ruler is provided with recess along length direction, and folding ruler is divided into several short rulers, and short ruler is connected with hinge;Laser source and reflector are provided on the adjustable target, and adjustable target is embedded recess to form sliding connection;The telescopic fixing mechanism includes telescopic link and first fixed bolt.The utility model integrates clamping, extension, measurement, target and locking function in one, adapt to the narrow space limit of construction;The short ruler design of folding ruler meets different pipe diameter measurement demand;Telescopic link adjusts included angle, ensures that folding ruler is perpendicular to pipeline axis, reduces inclination error.

The present invention relates to a compression deformation test device and method for refractory fiber products, the device comprising a fixed frame, a mobile frame, an oil hydraulic press, an upper ball seat, a force sensor, a support column, a lower ball seat, a sample loading platform and a displacement measuring device; the fixed frame is provided with a fixed top plate and a fixed bottom plate, and the mobile frame is provided with a mobile top plate and a mobile bottom plate; an oil hydraulic press, an upper ball seat and a force sensor are sequentially arranged between the fixed top plate and the mobile top plate from bottom to top; between the mobile bottom plate and the fixed top plate, a support column, a lower ball seat and a sample loading platform are sequentially arranged on the top of the mobile bottom plate from bottom to top; displacement measuring devices are respectively arranged on both sides of the mobile frame in the fixed frame, and the displacement measuring devices are 2 or 4, and are arranged with the sample loading center line as the symmetry axis. The present invention can accurately test the compression deformation characteristics of heat-insulating refractory products with large compression deformation characteristics, such as refractory fiber products, and provide reliable technical parameters for the furnace body design of industrial furnaces.

The utility model discloses a kind of self-calibration oil water content measuring devices, belong to oil-water mixed fluid measurement field, including flow computer, fluid inlet pipeline, fluid outlet pipeline, electric three-way valve and measuring assembly, the three interfaces of electric three-way valve are respectively communicated with fluid inlet pipeline, fluid outlet pipeline and measuring assembly, the measuring assembly includes respectively with electric three-way valve two interfaces intercommunication measuring tube one and measuring tube two, the measuring tube one outside is wound with electric heat tracing band, the top of measuring tube one and measuring tube two is respectively equipped with insertion rod type oil water content measuring instrument one and insertion rod type oil water content measuring instrument two, the measuring tube one and measuring tube two are communicated by connecting pipe one, one-way valve is equipped on the connecting pipe one, the measuring tube two is communicated with fluid outlet pipeline by connecting pipe two. The utility model has both sampling static measurement and continuous measurement, two kinds of modes can be carried out simultaneously, also can be carried out separately.

The utility model discloses a crack sensing sensor based on optical fiber sensing, and belongs to the technical field of civil structure health monitoring. The problems that the testing precision of an existing crack measuring device is extremely prone to being interfered by the surrounding environment, and the measuring precision is low are solved. The optical fiber grating sensor comprises a mounting shell, a cantilever beam and an optical fiber grating, the mounting shell is of a cavity structure with a fixed connecting end and a stretching movable end, and the fixed connecting end and the stretching movable end can slide relatively; the cantilever beam is of a long-strip-shaped structure with elastic deformation and resilience capacity, the cantilever beam is horizontally arranged in a cavity of the installation shell, the length direction of the cantilever beam is the same as the moving direction of the stretching movable end, the tip end of the cantilever beam is fixedly connected to the fixed connecting end, and the tail end of the cantilever beam abuts against the stretching movable end and is in a bent state. The fiber bragg grating is installed on the cantilever beam, and the length direction of the fiber bragg grating is consistent with the length direction of the cantilever beam. The device is mainly used for measuring cracks in the road surface and the roadbed.

The utility model relates to photovoltaic equipment installation technical field discloses an auxiliary measuring tool for photovoltaic installation, including measuring scale, the upper surface of measuring scale is inlayed and is equipped with horizontal bubble disc, the bottom of measuring scale is equipped with three screw thread support legs of triangle distribution, the bottom of screw thread support leg outer surface is connected with internal thread support foot through screw thread adaptation, the middle part of measuring scale upper surface is printed with scale mark along its length direction. This auxiliary measuring tool for photovoltaic installation, through setting up the combination structure of horizontal bubble disc, three screw thread support legs of triangle distribution and internal thread support foot, can quickly adjust the horizontal state of the tool, and horizontal bubble disc can intuitively feedback the inclination, and the triangle distribution of three support legs has stable supporting property, and cooperates the internal thread support foot of screw thread adjustment, can flexibly adapt the installation ground of different flatness, ensures the horizontal accuracy of the measurement datum plane, and provides reliable foundation for subsequent length, angle measurement.

The application discloses a positron annihilation lifetime measurement device and method for thin film sample characterization, which is composed of a positron emitter, a positron detector and a gamma detector; a sample is placed between the positron emitter and the positron detector. The positron emitter contains a radioactive source and is responsible for detecting the positrons entering the sample, and the positron detector is responsible for detecting the positrons penetrating the sample. The gamma detector is responsible for detecting the 0.511 MeV gamma photons generated after the positrons are annihilated. The application can break through the limitation of measuring the sample thickness, is suitable for all types of positron radioactive sources, and sufficiently widens the experimental conditions; meanwhile, the non-contact measurement function can expand the application of the positron annihilation lifetime measurement method in the measurement of special samples and special environments.

The invention discloses a double-pole double-throw radio frequency switch, which comprises a radio frequency module, an electromagnetic transmission assembly and a control module, and is characterized in that the radio frequency module comprises a base body; the base body is fixedly covered with the cover plate, and a first hole groove is formed in the side, away from the base body, of the cover plate; the side, facing the cover plate, of the base body is provided with a first groove, at least part of the reed is located in the first groove, the thickness of the reed is 0.05-0.1 mm, and the reed is provided with a reinforcing rib; the positioning seat is arranged on the side, away from the base body, of the cover plate corresponding to the reed; each positioning seat is correspondingly provided with two positioning rods, and the positioning rods penetrate through the cover plate and are fixedly connected with the positioning seats and the reeds; the two ends of the elastic piece abut against the cover plate and the positioning base respectively, at least part of the elastic piece is located in the first hole groove, the radial size of the elastic piece is matched with that of the first hole groove, and the elastic piece is of a multi-bend S-shaped structure; and the radio frequency connector is connected to one side, far away from the cover plate, of the base body. The double-pole double-throw radio frequency switch is good in reset elasticity and simple in assembly structure, and the transmission frequency is effectively improved.

The utility model belongs to the technical field of fluid measuring instruments, and discloses a movable lifting type molten aluminum viscosity testing and stirring device which comprises a base, the base is a cuboid frame, a plurality of moving devices are installed at the bottom of the cuboid frame, and a sliding mechanism is installed on the side face of the cuboid frame; the lifting device comprises a supporting cross beam and a plurality of telescopic rods, the two ends of the supporting cross beam are installed above the cuboid frame through the telescopic rods, and a stirring device and a testing device are installed on the supporting cross beam. According to the technical scheme, flexible movement is achieved through the universal wheels, the telescopic rod is arranged to adjust the measuring height, the display screen and the button are integrated to simplify operation, the high-precision torque sensor is adopted to guarantee the measuring precision, and portability, adaptability and accuracy are achieved at the same time.

This utility model discloses a precision measuring device for machining mechanical parts, relating to the field of mechanical parts measurement. The device includes a crossbar with a groove in its middle containing a scale fixedly mounted. An upper fixed head is fixedly mounted on the top of one end of the crossbar, and an inner diameter measuring mechanism for measuring the inner diameter of the mechanical parts is slidably mounted on the side of the upper fixed head. A lower fixed head is fixedly mounted on the bottom of one end of the crossbar, and an outer diameter measuring mechanism for measuring the outer diameter of the mechanical parts is slidably mounted on the side of the lower fixed head. A horizontal plate is fixed to the side of the crossbar. Through the inner and outer diameter measuring mechanisms, this device can simultaneously measure the inner and outer diameters of mechanical parts, meeting various measurement needs. The combination of the horizontal and vertical plates, along with the angle measuring mechanism, allows for the measurement of angles in mechanical parts. This device is suitable for measuring various mechanical parts and can meet the needs of different processing scenarios.

The cuff comprises a first section, a reset part and a second section, the first section comprises a shell and a containing cavity defined by the shell, and an opening communicating the interior and the exterior of the containing cavity is formed in the shell; the reset piece is located in the containing cavity and connected with the shell. At least part of the second section extends into the containing cavity and is connected with the reset part, the second section is configured to pull the reset part to extend to enable the part, extending out of the opening, of the second section to be lengthened when the second section is subjected to external force in the direction away from the reset part, and the reset part is configured to apply reset force close to the reset part to the second section. According to the cuff, the containing cavity is formed in the first section, the reset piece is arranged in the containing cavity, and the reset piece is connected with the first section and the second section, so that when the second section is pulled, the reset piece can be driven to extend, the part, extending out of the opening, of the second section is lengthened, and then the length of the whole cuff is increased; and the measurement requirement of a thick-arm user is met.

The application provides a precision calibration detection instrument, which comprises a test table, a sleeve spindle, a height adjustment assembly in threaded transmission connection with the upper end of the sleeve spindle, and a swing fine adjustment assembly in eccentric lever mode hinged in the sleeve spindle; the swing fine adjustment assembly forms a non-equal force arm lever structure with the pivot as a fulcrum, and converts the linear adjustment displacement of the upper end into the micron-level angular displacement fine adjustment of the test table of the lower end, so that the technical problem that the existing devices mostly adopt direct translation type fine adjustment, the adjustment precision can only reach 0.01mm level, and the sub-micron level precision measurement requirement cannot be met is solved.

The utility model discloses a tool for rapidly and accurately measuring the ovality of a fragmented tower drum flange, which comprises an L-shaped fixed ruler and a slidable measuring ruler assembly, the long edge of the L-shaped fixed ruler is provided with a C-shaped groove structure, the back of the L-shaped fixed ruler extends to form a longitudinal reinforcing rib, the inner side of the C-shaped groove structure is provided with a wear-resistant layer, and the outer side of the L-shaped fixed ruler is provided with a longitudinal reinforcing rib. The slidable measuring scale assembly comprises an L-shaped graduated scale and a guide part embedded into the C-shaped groove structure, the fit clearance between the guide part and the C-shaped groove structure is 0.05-0.15 mm, and the measuring edge of the L-shaped graduated scale is of a fillet structure. The tool has the advantages of being simple in structure, convenient to operate, accurate in measurement, good in stability and the like, and can be widely applied to the tower manufacturing process of the wind power generation industry.

The utility model provides an intelligent mechanical arm wrist force sensor, and relates to the technical field of intelligent robots, the intelligent mechanical arm wrist force sensor comprises a mechanical arm mounting seat, the top of the mechanical arm mounting seat is provided with a detection processing circuit through a nut, and the top of the mechanical arm mounting seat is provided with an anti-overload force measuring elastic body; a protective shell is arranged at the top of the anti-overload force-measuring elastic body; the anti-overload force measurement elastic body comprises an inner shell and an outer shell, an outer rigid connector is arranged at the top of the outer shell, a high-precision measurement loop is arranged in the detection processing circuit, and the measurement requirements of force and torque in three orthogonal directions of the wrist joint sensor are met. The designed assembly type mechanical arm mounting base can be matched with the tail ends of joints of most robots in the market, the measurement requirements of most collaborative robots and humanoid robots are met, and the mechanical arm has the advantages of being capable of recognizing spatial multi-dimensional force, high in measurement precision, high in overload resistance, easy and convenient to install and rapid to operate.

The invention discloses a three-station moving cutter angle synchronous measurement tool, which comprises a moving cutter assembly, and one end of the moving cutter assembly is detachably connected with a pointer; the initial positioning tool is used for clamping the moving cutter assembly and the pointer and enabling the pointer and a moving contact of the moving cutter assembly to be arranged in parallel; the side wall of the three-station arrangement tank body is provided with a ground knife position contact seat and an isolation position contact seat corresponding to different stations, the space between the ground knife position contact seat and the isolation position contact seat corresponding to the three-station arrangement tank body is an air-break isolation position, and the moving knife assembly is connected with the three-station arrangement tank body through a moving contact seat. The moving contact rotates relative to the moving contact seat and can be in contact communication with the ground knife position contact seat and the isolation position contact seat; the auxiliary measuring disc is fixed to the outer side of a flange opening of a moving contact operation shaft of the three-station arrangement tank body, the pointer and the auxiliary measuring disc correspondingly refer to each other and can synchronously feed back the position of the moving contact in the three-station arrangement tank body, the structure is simple, assembling and positioning of the moving cutter assembly can be achieved, and meanwhile rotation angle measurement of the moving cutter assembly is achieved.

The invention relates to a two-dimensional gap measurement method, device and system and computer equipment. Two sides of the two-dimensional gap are respectively provided with a magnetic core, at least one magnetic core is provided with a horizontal coil, at least one magnetic core is provided with a vertical coil, and a first inductance value of the horizontal coil and a second inductance value of the vertical coil are obtained; determining a horizontal distance of the two-dimensional gap based on the first inductance value and a first relationship, wherein the first relationship comprises a corresponding relationship between the inductance value of the horizontal coil and the horizontal distance; and determining the vertical distance of the two-dimensional gap based on the first inductance value, the second inductance value and a second relationship, wherein the second relationship comprises a corresponding relationship among the inductance value of the horizontal coil, the inductance value of the vertical coil and the vertical distance. The horizontal distance and the numerical distance of the two-dimensional gap can be determined by obtaining the inductance values of the horizontal coil and the vertical coil, the two-dimensional gap can be conveniently measured, installation is easy, the application range is wide, and the measurement requirements of most two-dimensional gaps can be met.

The invention discloses a measurement range expansion method of a spectral light field imaging temperature measurement system and an imaging device. The measurement range expansion method of the spectral light field imaging temperature measurement system comprises the following steps: establishing a response model of a temperature measurement system spectral channel through a blackbody furnace calibration experiment; and establishing a target function, and optimizing the established target function to obtain the attenuation slice transmittance of the central wavelength of the channel. The measurement range of the spectral light field imaging temperature measurement system is expanded by obtaining the transmittance of the attenuation sheet with the central wavelength. The method provided by the invention can be suitable for temperature measurement objects with different spectral characteristics, and ensures the consistency of dynamic response of each channel and broadens the measurement range of a temperature measurement system by combining a specified temperature measurement interval and adjusting the transmittance parameter of the attenuation slice.