88 results about "Injection rate" patented technology

A control system for a gas assisted plunger lift (GAPL) system includes a sensor and a processor circuit. The sensor is configured to measure a plunger speed and / or velocity and the processor circuit is configured to control various parameters of the GAPL based on the measured plunger speed and / or velocity. The processor circuit may be configured to adjust a gas injection rate parameter based on the measured plunger speed and / or velocity, and / or may adjust one or more parameters including: a close time, an afterflow time, a flow rate, a load factor, a tubing pressure, a casing pressure, and a tubing / casing differential pressure. The controller may be further configured to adjust all parameters simultaneously or may sequentially adjust a first sub-set of parameters and then adjust a second sub-set of parameters. The first sub-set may include a gas injection flow rate and the second sub-set may include after-flow and close time parameters.

A pen-type full-automatic precision injection system, comprising: a support table (1), an injection assembly (2), a connecting device (3), a control console (4), and a control switch (5). The control console (4) is arranged on the support table (1), the injection assembly (2) is connected to the control console (4) by means of the connecting device (3), and the control switch (5) can control the injection assembly (2) by means of the control console (4). The injection assembly (2) comprises an auxiliary positioning device (21), a housing (22), a drug storage device (23), a first movement assembly (24), and a second movement assembly (25). The auxiliary positioning device (21) is connected to a left wall of the housing (22). The first movement assembly (24) can drive an outer barrel (231) of the drug storage device (23) to move left and right, an injection needle (232) of the drug storage device (23) can penetrate through the housing (22) and the auxiliary positioning device (21) to pierce the skin of a human body, and the second movement assembly (25) can push a pushing rod (233) of the drug storage device (23) to move to push an injection liquid into the human body. The pen-type full-automatic precision injection system can achieve functions such as automatic injection, adjustment of the injection depth, precise control over the needle piercing depth, precise control over the injection dose, precise control over the injection rate, bubble detection, and pressure detection during injection.

The invention relates to the technical field of injection molding control, in particular to an injection molding control method and system for a plastic box body of a junction box, and the method comprises the steps: obtaining the injection speed of an injection molding machine and the temperatures of the front, middle and rear positions of a charging barrel in the injection molding process of the plastic box body of the junction box; obtaining the temperature flow deviation of the charging barrel at each moment and the melt time flow fluctuation degree of the charging barrel, obtaining the temperature interference adjustment coefficient of the injection rate of the injection molding machine by combining with the average level of the temperature preset initial values of all positions of the charging barrel, and further obtaining the target quantity of the injection rate of the injection molding machine at the current moment; the injection rate of the injection molding machine in the injection molding process of the plastic box body of the junction box is adjusted. The production quality stability of the plastic box body of the junction box is improved.

The invention relates to the technical field of carbon dioxide sequestration, in particular to a saline water layer carbon dioxide sequestration evaluation and monitoring integrated method and system. Dynamic injection data are obtained, the deviation degree between the dynamic injection data and the initial injection scheme is calculated to obtain an injection pressure deviation state value, an injection rate deviation state value and a bottom hole pressure deviation state value, and then a comprehensive deviation state value is obtained; on the basis of a comparison result of the comprehensive deviation state value and an expected comprehensive deviation state value, periodic monitoring is determined according to an original plan, or deep analysis is carried out to determine an abnormal source; and adjusting the monitoring scheme and the opening degree of the injection pump or the opening degree of the flow regulating valve in real time based on the abnormal source, and inverting new data obtained according to the new monitoring scheme into the geological numerical model so as to update and correct the numerical simulation process. According to the invention, the injection scheme can be dynamically optimized based on real-time data, and the injection efficiency is improved.

The invention belongs to the technical field of steelmaking equipment, and discloses a blast furnace pulverized coal injection real-time injection rate deviation control system and method and application. Comprising a PLC system, a PID controller, a blowing rate detector and a blowing system, the PLC system is connected with the PID controller, the blowing rate detector and an actuator, and the PLC system comprises a real-time monitoring module, an accumulated deviation calculation module and a feedback parameter selection module. By monitoring the injection rate in real time and dynamically switching feedback parameters (an hour accumulated deviation value and a real-time deviation value), the response time of the system is remarkably shortened, and the overshoot phenomenon caused by hysteresis is effectively reduced. By combining the self-adaptive PID controller, proportion, integral and differential coefficients can be automatically adjusted according to the size of the deviation value, real-time fluctuation is inhibited while accumulative errors are eliminated, oscillation adjustment of the coal flow valve is greatly reduced, and stability and continuity of the injection rate are guaranteed.

The invention discloses a liquid injection method and device for a to-be-injected lithium battery, computer equipment and a medium. The liquid injection method comprises the following steps: acquiring the rated capacity of a battery to be injected, the actual liquid injection port diameter and the actual liquid injection port number on a shell of the battery to be injected, and acquiring the set liquid injection amount of a liquid injection machine; the liquid injection time is calculated according to the rated capacity, the actual liquid injection opening diameter, the liquid injection opening number and a preset mathematical model; wherein the preset mathematical model comprises the corresponding relation between the liquid injection time and the rated capacity, the actual liquid injection port diameter and the liquid injection port number; the liquid injection rate is determined according to the liquid injection time and the set liquid injection amount; and injecting liquid into the to-be-injected lithium battery according to the liquid injection rate and the liquid injection time. According to the method, the liquid injection time is accurately calculated through the pre-established preset mathematical model among the rated capacity of the battery, the liquid injection port parameters and the liquid injection time, the method is simple and high in applicability, the consistency of the liquid injection amount of the battery can be ensured, the production efficiency is improved, expensive liquid injection equipment is not needed, and the cost is reduced.

This invention provides a treatment accelerator injection system that allows for the real-time selection of the appropriate injection rate of the treatment accelerator. [Solution] The treatment accelerator injection system comprises a water treatment measurement unit, an acquisition unit, a treated water quality prediction unit, and an injection rate determination unit. The water treatment measurement unit acquires water quality information of the water treatment. The acquisition unit acquires at least constraint condition information that defines the water quality state of the treated water after water treatment, operating condition information when water treatment is performed, and a plurality of different assumed injection rate values ​​indicating the provisional injection rate of the treatment accelerator for water treatment of the water treatment. The treated water quality prediction unit acquires, for each assumed injection rate value, the predicted treated water quality obtained when water treatment is performed according to the operating condition information by injecting the treatment accelerator based on each assumed injection rate value into the water treatment indicated by the water quality information. The injection rate determination unit determines the assumed injection rate value corresponding to the predicted treated water quality value that satisfies the constraint condition information as the final injection rate value, based on the plurality of predicted treated water quality values ​​and the constraint condition information.

A deformable self-adapting injection pressurization robot relates to the technical field of fluid pressurization. The injection pressurization robot is composed of a deformable injection pressurizer, a process data acquisition and processing system, a shape, position and size measurement and processing system, a deep learning system and a servo drive system. The deformable injection pressurizer includes a nozzle, a receiving chamber, a mixing chamber, a diffusion chamber and an outlet straight edge section, which are all composed of a dynamic adjustment disc, a slice and a fixed reference disc, and the radial adjustment is realized by rotating the dynamic adjustment disc. The robot takes the output information of the process data acquisition and processing system and the shape, position and size measurement and processing system as the learning parameters of the deep learning system, and establishes the proxy model of the performance characteristics such as injection rate and pressurization ratio; when the working condition changes, the optimal shape, position and size signal is automatically fed back, and the deformation of the robot is completed by the servo drive system. The present application can adaptively deform to ensure the optimal injection performance without replacing parts, and has high adjustment precision and large operation interval.

The application aims to provide a method for regulating the consistency of injector injection of each cylinder of an engine considering transient supply-injection disturbance, belonging to the field of engines. First, the rail pressure curve, the injector inlet pressure curve, the driving current curve and the injection rate curve data under different supply time and injection time are obtained on a high-pressure fuel injection system test bench to construct a data set. Then, based on the data set, a Transformer time series model is established with the rail pressure, pressure and current curve as input and the injection rate as output, the injection rate is predicted online and the injection quantity is calculated through time integration. Next, through the programmable logic controller, the injection pulse width under different supply and injection time is feedback regulated to realize the accurate control of the injection quantity of single and multiple injections of each cylinder. The application effectively responds to the supply-injection disturbance under transient working condition, improves the consistency of the injection quantity of each cylinder, and improves the combustion efficiency and running stability of the engine.

A valve assembly for integration within a wellbore string is provided. The valve assembly includes a valve housing defining a fluid passage therethrough and having injection ports, and a flow restriction component extending between the fluid passage and the injection ports to establish fluid communication therebetween. The flow restriction component is configured to create a flowrate restriction along a flow path length thereof, with each injection port being aligned with respective portions of the flow restriction component to define respective flow path lengths defining respective degrees of flowrate restriction. The valve assembly also includes a flow adjuster connected to the valve housing and being fluid-pressure actuatable to align an outlet with one of the injection ports such that fluid flow between the fluid passage and the reservoir is restricted by a corresponding degree of flowrate restriction to maintain an injection rate substantially constant.

The invention discloses an ultrahigh-pressure oil injector with an overhead reset spring. The ultrahigh-pressure oil injector comprises an oil injector shell, a control valve screw, the reset spring, a control valve matching part and a needle valve matching part. A stepped middle hole in the middle of the fuel injector shell and a fuel nozzle seat face form a pressure storage cavity, and the control valve matching part abuts against the needle valve matching part to form an upper coupling cavity structure and is arranged in the pressure storage cavity. The control valve assembly is provided with a control valve sleeve, a rod, a cavity, an oil inlet throttling hole and an oil outlet throttling hole, the needle valve assembly comprises a needle valve sleeve and a rod, the needle valve sleeve and the rod form a closed coupling cavity, and the volume of the closed coupling cavity is smaller than or equal to 45 mm < 3 >. The reset spring is arranged in a spring chamber at the upper end of the control valve rod, and an oil inlet throttling hole is formed in the top of the spring chamber. The upper end face of the control valve rod is a plane, and the lower end face is a spherical face and forms a self-alignment adjusting structure with the plane end of the needle valve rod. The oil injector makes remarkable technical breakthrough in the aspects of sealing performance, oil injection pressure, precision, dynamic response, oil injection rate adjustment and the like, oil consumption and emission can be effectively reduced, the power per liter of an engine is improved, powerful support is provided for efficient and environment-friendly operation of the engine, the market application prospect is wide, and the technical value is great.

The utility model relates to the technical field of cash box door molds, in particular to a cash box door pin-point gate to large gate side glue feeding structure which comprises a fixed mold plate, and a fixed mold frame is fixedly mounted at the bottom of the fixed mold plate. According to the side rubber feeding device, the side rubber feeding mechanisms are fixedly mounted on the upper mold and the lower mold, the side rubber feeding device can be conveniently connected with a pipeline of rubber feeding equipment through the first pipe joint and the second pipe joint, and the first rubber feeding pipe, the second rubber feeding pipe, the first conveying pipe, the second conveying pipe, the third conveying pipe, the fifth conveying pipe and the sixth conveying pipe are matched for use, so that injected rubber flows; and a first glue outlet, a second glue outlet, a third glue outlet and a fourth glue outlet are used for conveniently injecting glue into the upper mold and the lower mold, use is more convenient and faster, pipelines on the side glue inlet mechanisms are all in a communicated state, therefore, glue is injected into the upper mold and the lower mold more quickly, the speed of injecting glue into the upper mold and the lower mold is increased, and the production efficiency is improved. And the practicability of the side glue feeding structure for converting the pin-point gate to the large gate of the cash box door is further improved.

The invention provides a pressure drive development water injection speed optimization method. The optimization method comprises the steps that S1, a pressure value P1 at the limit oil supply radius is calculated according to the oil well yield; s2, according to the given total injection amount, the given pressure-driving injection speed and the corresponding pressure-driving water injection time are calculated, and the half length of the fracture is calculated; s3, solving a pressure value P2 at the limit oil supply radius of the pressure flooding water injection pressure profile according to the fracture half length; s4, comparing the pressure value P1 at the limit oil supply radius with the pressure value P2 at the limit oil supply radius of the pressure flooding water injection pressure profile; and S5, when P2 is larger than P1, it is indicated that displacement is effective, and otherwise, the water injection state is adjusted to achieve effective displacement. The optimal water injection speed is determined to ensure effective displacement of the pressure driving operation and avoid water channeling between the injection well and the production well.

The invention discloses a method for improving the crude oil recovery ratio through pressure drive-CCUS cooperation, and the method comprises the steps: S1, screening a unit with a poor conventional oil reservoir development effect, specifically, a low-permeability reservoir with the calibrated recovery ratio being lower than 10%; s2, evaluating the suitability of applying pressure drive-CCUS to the low-permeability oil reservoir, and determining a target oil reservoir according to the evaluation standard of the target oil reservoir; s3, closing the oil well of the target oil reservoir, which is subjected to pressure driving, and recording the wellhead pressure of the oil well, and the liquid production capacity and the water content before well closing; s4, water with the preset capacity is injected into the target oil reservoir at the preset injection speed through the injection well, and the injection displacement is based on the condition that the injection pressure reaches the formation fracture pressure; and other steps. According to the method, formation permeability improvement and formation energy supplementation are achieved in a pressure driving mode, the CCUS provides a guarantee for enlarging the swept volume and improving the oil displacement efficiency for pressure driving, and the recovery efficiency is greatly improved through the synergistic effect of the CCUS and the CCUS.

The invention discloses a novel auxiliary injection device for preventing and controlling bovine epidemic diseases, and belongs to the technical field of epidemic prevention injection.The novel auxiliary injection device comprises a shell, a piston is arranged in an injection cylinder, one end of the piston is fixedly connected with a push rod, and the left end face of the injection cylinder communicates with a connector extending out of a through hole; a quantifying mechanism is arranged on the outer wall of the shell; a clamping mechanism is arranged on the left end face of the shell, by arranging the quantifying mechanism, when the proximity rod moves to be aligned with the proximity sensor, a signal is transmitted to the signal processor through the proximity sensor, the servo motor is controlled to stop through the signal processor, and then the push rod and the piston are made to stop moving; the movable plate is extruded by the extrusion spring, and the sleeve is firmly fixed on the outer wall of the connector by the movable plate, so that the injection speed and the injection dosage are convenient to control, the injection effect is good, the working efficiency is high, and the needle head is not easy to fall off.

To control hydrostatic backpressure of disposal wells connected to a disposal plant surface network, density of water to be injected from a water disposal plant system into disposal wells formed in a subterranean zone, a density of a hydrostatic backpressure-modifying additive to modify a density of the water, a target total injection flow rate of the water, and a vertical depth of a portion of the subterranean zone through which the water is to be injected are identified. Injected water flow rate upstream of an injection point into the multiple disposal wells, wellhead injection pressure needed to achieve the target total injection flow rate and a total injection rate are periodically received. Based on these parameters, dosage rate of the additive to maintain the target total injection flow rate is periodically determined. An additive quantity is injected into the water and periodically modified based on the periodically determined dosage rate.

An injection molding machine and a viscosity measurement method of the disclosure are provided with an injection cylinder to which a viscosity measurement unit is attachable and detachable and a control device. When setting an inner diameter of the injection cylinder or an outer diameter of the injection shaft as D. For a capillary installed to the viscosity measurement unit, a capillary inner diameter is set as d. By respectively using three or more values γk of the shear rate, k being a natural number, the control device is configured to calculate injection velocities Vk based on Formula (1) and automatically sets a value of the injection velocity Vk within a predetermined range, among the calculated injection velocities, as an injection velocity at a time of viscosity measurement.[Formula⁢ (1)]Vk=d38⁢D2⁢γk(1)

The invention relates to the technical field of cementing devices, and discloses a multi-stage reinforcement type graded cementing device which comprises an injection pipe, a material injection assembly is arranged at the top end of the injection pipe, and a circulation assembly is arranged at the top of the injection pipe; the material injection assembly comprises a circular cavity pipe, a first circular ring plate, memory alloy and a piston plate, and self-adaptive pressurized conveying of cement paste is achieved through the deformation characteristic of the memory alloy in cooperation with a sliding sealing structure of the piston plate and the circular cavity pipe; when the pressure of cement paste in the injection pipe rises, the pressure pushes the piston plate to extrude the memory alloy to form bending deformation, so that a gap is formed between the piston plate and the inner wall of the circular cavity pipe, and the cement paste can quickly enter the conveying pipe through the gap and then is injected into an annular space through the injection hole; in addition, the rebound resilience of the memory alloy can assist the piston plate in resetting, the sealing performance of the injection channel after the pump is stopped is guaranteed, and cement paste backflow is avoided; according to the design, additional control components are not needed, the material injection rate can be automatically adjusted according to pressure changes, and the pouring stability under the complex well condition is improved.

This application relates to the field of oilfield technology, specifically to a method for enhancing oil recovery based on the emulsification effect of ternary composite flooding and its application. The method includes: determining the optimal ratio of ternary composite flooding under each type of reservoir condition; setting up monitoring points; analyzing the injection pressure variation characteristics of ternary composite flooding during the early injection void volume stage, combining the numerical deviation of the injection pressure to obtain necessity evaluation parameters, and determining the injection pressure control time and priority of the early injection pressure control targets; during the mid-stage injection void volume stage, analyzing the water cut changes at each monitoring point and control time during each injection process, determining emulsification evaluation indicators, determining adjustment coefficients, and obtaining the target injection rate at each pressure control time in the mid-stage. This application aims to adjust the injection strategy in real time to ensure that ternary composite flooding achieves optimal results at different stages, thereby effectively improving oil recovery.

The invention discloses a liquid carbon dioxide phase change refrigeration system and method based on dynamic gas displacement adjustment, and relates to the technical field of refrigeration control and thermotechnical process automation, and the method comprises the following steps: S1, collecting temperature, pressure, cooling capacity and power data, and constructing an operation state vector; s2, setting the opening degree of an exhaust valve and the liquid injection rate as control variables, superposing periodic disturbance and nonlinear modulation signals, and constructing a disturbance input sequence; s3, fusing the disturbance input and the target response signal, and inputting the disturbance input and the target response signal into a control channel filter to generate a channel response signal; s4, estimating a disturbance response value through a generalized state filter; s5, constructing a nonlinear control law, and outputting a basic control quantity; s6, a regulation factor is generated according to the cooling capacity and the temperature change rate, and a control quantity is output; and S7, controlling the execution unit and feeding back the state to form a closed-loop process. According to the invention, the response speed and the temperature control precision of exhaust and liquid injection adjustment are improved.

The invention discloses an injection rate measuring device and an injection rate measuring method, and belongs to the technical field of measurement and test, the injection rate measuring device comprises a memory and a measuring assembly, the memory can be connected with an injection assembly, and an outlet of the memory can be communicated with an inlet of the injection assembly; the measuring assembly can communicate with an outlet of the injection assembly and an inlet of the storage, the measuring assembly comprises a metering module, a back pressure valve and a pressure sensor, the metering module can be connected with the injection assembly, and an inlet of the metering module can communicate with the outlet of the injection assembly; an inlet of the back pressure valve is communicated with an outlet of the metering module; the back pressure valve is connected with the storage, and an outlet of the back pressure valve can be communicated with an inlet of the storage; the pressure sensor can be in communication with the outlet of the injection assembly. By arranging the back pressure valve, the fluid can be kept in a liquid state, fluid parameters can be conveniently collected, and the measurement error of the injection rate can be reduced.

The invention discloses a gas phase compensation compressible fuel injection coupling test device and a correction method, the gas phase compensation compressible fuel injection coupling test device comprises a piston pressurization cavity, an injection rule test cavity, a connecting cylinder and an elastic modulus test cavity which are coaxially communicated, and a driving / driven piston is in rigid linkage to form equivalent specific volume coupling; the jet cavity is connected with the sound velocity testing cavity through a communication channel, a microwell plate and a variable resonant cavity are arranged in the channel to form an adjustable acoustic filter network, and the sound velocity testing cavity is provided with sound velocity ports which are oppositely arranged up and down. The system is triggered by a unified hardware clock and synchronously acquires pressure, displacement, temperature and sound velocity. According to the method, the volume elastic modulus is measured firstly, the injection rate is obtained according to a volumetric method, the gas content and the actual elastic modulus are inversed in combination with the cross-correlation sound velocity and the Wood equation, temperature correction is introduced, and real-time compensation of the injection rule is achieved through expansion / unscented Kalman filtering online estimation back substitution. According to the scheme, high-frequency interference is inhibited, sampling time difference is avoided, and injection rate metering accuracy is improved.

The utility model discloses an efficient injection device of a saline injection machine, which belongs to the technical field of food processing equipment and comprises a needle tube, a water injection channel is arranged in the needle tube, a base is positioned on the needle tube, a sliding seat is movably sleeved on the base, and a plurality of meat pressing plates for pushing the surfaces of objects to squeeze the peripheral side of the needle tube are fixedly arranged on the sliding seat. And an elastic piece capable of applying elastic force to the sliding seat is arranged on the base. According to the efficient injection device of the saline injection machine, after the needle tube is inserted into a meat block, the meat pressing plates push the surface of an object to extrude the peripheral side of the needle tube under the abutting action of the elastic pieces, so that saline is not easy to flow out along the direction opposite to the direction in which the needle tube is inserted into the meat block during saline injection; and the state is maintained under the action of the elastic piece within a period of time when the needle tube gradually leaves the meat block, so that the effective injection rate of the saline water is effectively improved when the needle tube injects the meat block every time.

This invention discloses a method, equipment, and storage medium for calculating the gas lift perforation depth in ultra-deep wells, specifically including the following steps: S1, collecting gas well production data and wellbore structure data; S2, establishing a physical model of the tubing based on the actual tubing dimensions, and meshing the tubing physical model; S3, deriving the calculation relationship between wellhead gas injection rate and wellhead pressure through numerical simulation, obtaining the optimal gas injection pressure and optimal gas injection rate; S4, calculating the relationship between bottomhole flowing pressure and wellbore vertical depth; S5, substituting the optimal gas injection pressure obtained in step S3 into the relationship between bottomhole flowing pressure and wellbore vertical depth in step S4, to obtain the well depth, which is the optimal design position of the gas injection valve. This invention is simple to calculate, yields relatively accurate results, and has strong applicability.

Correspondence between gas lift injection rates and production rates for a well is determined, and correspondence between gas lift injection rates and net incremental values for the well is determined. The correspondence between gas lift injection rates and production rates for the well defines a gas lift performance curve for the well, and the correspondence between gas lift injection rates and net incremental values for the well defines a net incremental value curve for the well. Control of the gas lift injection rate for the well is facilitated based on the correspondence between gas lift injection rates and the net incremental values for the well.

This invention discloses a method for adjusting injection parameters in horizontal wells with limited wellhead pressure rise. The method includes determining injection capacity evaluation indicators, influencing factors, and the number of levels for each influencing factor; numerically simulating and fitting a single-factor functional relationship to determine the water-polymer injection pressure ratio; obtaining an injection capacity prediction formula under multi-factor conditions using multivariate composite nonlinear regression; fitting parameters to the injection capacity prediction formula using the minimum sum of squared errors method; obtaining calculation formulas for injection rate and polymer viscosity based on the injection capacity prediction formula; calculating the maximum injection rate and maximum polymer viscosity under limited wellhead injection pressure rise conditions; and obtaining the optimal parameters for pressure constraints using the SLSQP algorithm. This application is applicable to polymer flooding development scenarios with limited wellhead injection pressure rise, balancing development efficiency and production safety, and providing technical support for chemical flooding injection.

A method for calculating the injection rate and cumulative injection volume of grouting slurry for a dam toe plate curtain grouting comprises the following steps: first, calculating the direction vector of the flow into the fissure from each side of a regular octagon, then calculating the flow rate into the fissure from each side of the regular octagon, then accumulating the flow rate into the fissure from each side to obtain the slurry flow rate injected into the fissure, then accumulating the flow rate injected into each fissure to obtain the slurry injection rate, and then using the integration principle based on the slurry injection rate calculated in the above steps to obtain the cumulative slurry injection volume. The algorithm of the present invention is reasonable, has a smaller computational load than traditional methods, improves calculation speed, and also improves calculation accuracy. It also has good adaptability to the three-dimensional random fracture network of the dam foundation rock mass, effectively avoiding the occurrence of excessive or insufficient grouting of the dam toe plate curtain grouting, and improving the construction quality of the dam.

This invention discloses a method and apparatus for determining the maximum performance of a split-phase catalytic converter (SCR). In this method, for the i-th second within the injection duration, the urea injection rate at the i-th second and the upstream NO concentration at the i-th second are considered. X Mass flow rate, downstream NO in the i-th second X The ammonia storage capacity of the SCR in second i is calculated based on the mass flow rate and SCR conversion factor, and the upstream NO in second i is used as a reference. X The concentration of NO in the downstream region at the i-th second X The concentration is used to calculate the SCR conversion efficiency in the i-th second, where i is a positive integer. The maximum ammonia storage capacity of the SCR at the current temperature is calculated by integrating the total ammonia storage capacity over the injection duration. The highest conversion efficiency among the conversion efficiencies in each second within the injection duration is taken as the highest conversion efficiency of the SCR at the current temperature. Using the method of this invention, the maximum ammonia storage capacity and the highest conversion efficiency of the SCR can be measured quickly and accurately.

The invention relates to the technical field of medical instruments, and particularly discloses an injection device and a rate control method.The injection device comprises an injection assembly and a pedal assembly, the pedal assembly comprises a base, a pedal piece, a transmission piece and a displacement detection piece, the transmission piece is rotationally connected to the base, the pedal piece is movably connected to the base, and the pedal piece is movably connected to the base; one end of the transmission part is connected with the pedal part, the displacement detection part is fixedly installed at the other end of the transmission part and electrically connected to a control panel of the injection assembly, and when the pedal part is treaded, the pedal part can rotate downwards to drive the transmission part to rotate, and then the displacement detection part is driven to rotate. Meanwhile, the displacement detection piece can form an electric signal according to the rotation stroke of the displacement detection piece and transmit the electric signal to the control panel of the injection assembly, and the control panel can change the injection rate of the injection device according to the electric signal, so that the injection rate of the injection device is adjusted by controlling the treading degree of the pedal.

This application relates to thermodilution injection fluid measurement and control. Apparatus and methods for measuring, controlling (or both) the thermodilution injection fluid flow rate used to calculate a thermodilution pulmonary parameter. An injection fluid delivery system includes a syringe for containing injection fluid and a delivery tube configured at one end to connect to a catheter. A flow measurement device is inserted into the delivery tube to generate a signal used to determine the flow rate of fluid from the syringe to the catheter. A processor receives the signal from the flow measurement device and calculates the injection fluid volume to be used as an input for calculating a thermodilution pulmonary parameter such as cardiac output. A GUI is provided to guide the user as to whether the injection rate is too fast or too slow. The system can include a constant flow valve to provide a constant flow rate from the syringe rather than measuring or calculating the flow rate.