Dual chronometry pulse interpolation provides fractional pulses for small volumes. The maxiflex meter prover module is used in meter proving systems for petroleum measurement the mx mp module uses pulse interpolation a method of double chronometry for increasing the resolution of flow metering pulses when proving meters. Index pulse interpolation double chronometry method topics that. Eliminates miles of field wiring during installation and the signal deterioration this generates. Performs pulse interpolation calculations in real time. Dual chronometry pulse interpolation english to french. Without pulse interpolation a prover that is 3 to 25 times larger than standard would be required to obtain a minimum of 10,000 counts per proving pass. The complimentary flowxpress software allows for virtually unlimited. This we achieve by double chronometry pulse interpolation while proving the master meter w. All of the components including a choice of fluid reservoirs are together in one enclosure, temperature controlled, to maintain consistency.
The use of the dynamic density values provides for a more accurate. With all background correction systems, there is a small time delay between the. Please fill out the following form to request an evaluation copy. All of our software is designed by pulse instruments for optimum flexibility and control. The range combines uptodate microprocessor and direct digital synthesis technology with easy to use, menudriven lcd operation. Implementation of doubletiming pulse interpolation applied. The pulseinterpolation method known as doublechronometry, described in this chapter, is an established technique used in proving flowmeters. The controller being operably connected to a module. The pulse generator thyristor block is controlled by the alpha angle reference signal and by the synchronization signal wt. The reason given by the authors is the use of different proprietary algorithms, which measure different aspects of the pulse contour waveform which is an interesting point. We offer emarketing, sales, service, project management, inventory and financials. Chapter 4proving systems section 6pulse interpolation. Calibration curve up to unlimited number of points linear and polynome.
Uses pulse interpolation dual chronometry for small volume provers svp. Generate pulses for twelvepulse and sixpulse thyristor. Details of every prove will be recorded in the truproof micro3 microcomputer, and transferred to associated systems, such as, flowcals proveit proving software platform. Unhaltable, normal, period, error, maintenance, positive and. Taking these measurements multiple times within required repeatability values allows for the calculation of the new kfactor. There are currently 3 main approaches to pulse interpolation.
Determining parameters for images amplification by pulses. Realistic simulation of radar pulses and complex radar. May 20, 2008 double chronometry pulse interpolation uses a high frequency master oscillator which increments time very precisely e. Pattern editing and control graphical waveform editor and control software for pulse instruments pi2005 patten generators, including pattern generators integrated into our test systems. The wt signal is an angle varying between 0 and 2pi radians, synchronized on zero crossings of the fundamental positivesequence. Smith meter turbine meters utilizing the smith meter. If pulseperiod does not find two positivepolarity transitions, p is empty. M factors computed by the software to the system and enjoy another. There are different types of prover arrangements in the market 3,57. Indication green led indicates when pulse input is on. To determine the transitions for each pulse, pulseperiod estimates the state. Accuracy of sinc interpolation can be seen in frequency domain by comparing kernel spectrum to ilpf spectrum. These comparisons do, however, suggest that these three pulse contour methods are not interchangeable. Mar 25, 2004 utilizing dynamic density values with the dual chronometry pulse interpolation standard equation of api 2540 takes into account the effects that changing pressure and temperature of the fluid and the material of the conduit 16 itself will have on the calculated flow volume.
Utilizing dynamic density values with the dual chronometry pulse interpolation standard equation of api 2540 takes into account the effects that changing pressure and temperature of the fluid and the material of the conduit 16 itself will have on the calculated flow volume. Through the use of pulse interpolation, meter proving can be accomplished with less than. Interpolation kernel can be pregenerated in subsample intervals and stored in a table. The machine requires the use of an operating computer that is capable of dual chronometry pulse interpolation. When used with dual pulse turbine meters, the apm can be used to create two api 5. The module senses a series of pulses that represent a known fluid volume in a proving loop.
Implementation of doubletiming pulse interpolation. What flowmeter calibration techniques do litre meter use. Svps require the use of an operating computer that is capable of dual chronometry pulse interpolation. Onboard storage 1 gb for audittrail, event and primary data logging in each module.
Metrology approvals1 include mid, oiml r117, and en12405. Pulse interpolation function standards compliance performs all logic necessary to perform automated meter proving, and performs pulse interpolation using the double chronometry method in accordance with the manual of petroleum measurement standards chapter 4 proving systems. Data acquisition and control software were written using vb. Hyperpulse background correction the hyperpulse background corrector, one of the fastest systems available, has been further improved by pulse interpolation. A pulse interpolation method used in small volume provers to provide for fractional meter pulse counting. Chronometric definition of chronometric by the free dictionary. Pulse interpolation is calculated in compliance with api mpms chapter 4. A method and apparatus for utilizing a controller to monitor a flow volume in a fluid transportation system.
Why then would one want to use something like this which generates x at outputs. Double chronometry pulse interpolation uses a high frequency master oscillator which increments time very precisely e. To determine the transitions that compose each pulse, pulsesep estimates the state levels of x by a histogram method. Potential users are cautioned that use of the technique absent the requisite accuracy can produce misleading results. The module also measures the fluid density of the fluid in the proving loop. Automated pneumatic spring plenum pressure control. This problem can be resolved by using pulse interpolation based on pulse chronometry techniques, similar to those described in api mpms chapter 4.
The maxiflex meter prover module is used in meter proving systems for petroleum measurement the mx mp module uses pulse interpolation a method of doublechronometry for increasing the resolution of flow metering pulses when proving meters. Time counter a is started when displacer or flag 24 trips. Select either windows or dos software based on step 2. The module being operably connected to a flow meter. Compact, unidirectional, bidirectional, master meter, dual chronometry, pulse interpolation. Pulse business software delivers innovative cloudbased business solutions to suit small, medium and corporate businesses. Period of bilevel pulse matlab pulseperiod mathworks. Options include dual solid state relays for local alarm or control and an isolated 420 ma or 10v selectable analog output, effectively providing a linearized analog transmitter output that tracks the reading that would be transmitted digitally. Pulse interpolation is used in much the same way as for dual chronometry, above, except that the mut and the height sensor are the two sources of pulses. Pulse interpolation is used in much the same way as for dual. Prover support with unidirectional, bidirectional, compact prover, master meter, with dual chronometry and pulse interpolation with a resolution of 100ns.
Computational cost is proportional to kernel length. An electronic circuitry was built to activatedeactivate counters gates, and to collect pulses. A single software command switches between the modbus and laurel ascii protocols. We introduce the complex amplitude and the corresponding power of a gaussian pulse according to at a 0 exp t2 2t2 0. Double chronometry pulse interpolation requires a high frequency master oscillator which. Some requirements and limitations of pulse interpolation techniques. Builtin redundancy for dual power supply, dual ethernet and software.
S pulsesepx returns the differences, s, between the midreference level instants of the final negativegoing transitions of every positivepolarity pulse and the next positivegoing transition. Implementation of doubletiming pulse interpolation applied to. June 2005 part 2 small volume provers history, design. This allows a better reconstruction of the details including the use of the characteristics of this type of amplification in order to achieve linear phase response in the edge transitions of the high resolution image. Pulse instruments specializing in meters and controls for ph, orp, oxidation reduction potential, ec, conductivity, tds, level, flow, ise electrodes, isfet ph meters, water treatment instruments, sanitizer and many others. B2 others applied for, truproof is the most advanced dual chronometric, pulse interpolation proving technique in the world today. Double chronometry for api meter proving as described in api mpms.
Time taken to displace voume in the compact prover. Hello, im supposed to design a transmit chain with a rootraised cosine pulse shaping filter followed by some interpolation stages. Pulse interpolation flow measurement detector radio. This master oscillator operates two counters which may be referred to herein as time counter a and time counter b. Separation between bilevel waveform pulses matlab pulsesep. The rrcfilter shall interpolate by 2, and its output shall be interpolated by 8, resulting in a total interpolation of 16. Litre meter have developed a simple program that enables quick monitoring of.
Accuracy of interpolation dependent upon kernel length. This allows for more accurate interpolation of transient signals such as gf and hsa 3000 signals. Onboard storage 1 gb for audittrail, event and primary data logging in. While only the dual chronometry method is illustrated in the api manual of petroleum measurement standards, this does not preclude the use of other methods, as long as they meet the criteria and test. St500 is one of a range of new generation simulators designed to meet the requirements for checking and calibrating fiscal and custody transfer flow computer systems. Time taken for the generation of pulses in the flow meter. Instrumentation with timers, counters and pulse interpolation see diagram 6. Dual pulse input totalizer modbus or laurel ascii protocol.
Pulse interpolation, though a mathematical technique, relies on the underlying and contributing uncertainty of the prover detector signal. P pulseperiodx returns a vector, p, containing the difference between the midreference level instants of the initial transition of each positivepolarity pulse and the next positivegoing transition in the bilevel waveform, x. Double chronometry for api meter proving as described in api mpms chapter 4. Sep, 2015 this we achieve by double chronometry pulse interpolation while proving the master meter w.
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