Rapid Test for Coliforms in Milk and Yogurt Using Automatic ATP Measurement System

Equivalent circuit has been widely used to simply the analysis for the motor, either conventional motor or special motor. Precision impedance measurement is the most important to the equivalent circuit analysis. Based on the principle of the motor equivalent circuit and the software LabVIEW, a low cost impedance measurement system for the motor production line is established because the impedance analytical instrument HP4294 is expensive. To test the equivalent impedance of USM, a low cost automatic impedance measurement system is established in this paper. The automatic system is combined with LCR3522 and communicated with PC computer in real-time through GPIB (general purpose interface bus). Not only the amplitude and the phase of the impedance, but also the inductance and the capacitance and the quality factor Q can be tested by this system in the same time. The system has succeeded in the measurement of the impedance-frequency relation of USM and the parameter of the no-brush director current motor. All these results from the data of the measurement are the basis of designing of the driving power, identification of the parameter of those motors. Also, the automatic measurement system applies a testing device for special motor such as USM in China.

BackgroundThe assessment of diaphragm function is crucial for effective clinical management and the prevention of complications associated with diaphragmatic dysfunction. However, current measurement methodologies rely on manual techniques that are susceptible to human error: How does the performance of an automatic diaphragm measurement system based on a segmentation neural network focusing on diaphragm thickness and excursion compare with existing methodologies?MethodsThe proposed system integrates segmentation and parameter measurement, leveraging a newly established ultrasound diaphragm dataset. This dataset comprises B-mode ultrasound images and videos for diaphragm thickness assessment, as well as M-mode images and videos for movement measurement. We introduce a novel deep learning-based segmentation network, the Multi-ratio Dilated U-Net (MDRU-Net), to enable accurate diaphragm measurements. The system additionally incorporates a comprehensive implementation plan for automated measurement.ResultsAutomatic measurement results are compared against manual assessments conducted by clinicians, revealing an average error of 8.12% in diaphragm thickening fraction measurements and a mere 4.3% average relative error in diaphragm excursion measurements. The results indicate overall minor discrepancies and enhanced potential for clinical detection of diaphragmatic conditions. Additionally, we design a user-friendly automatic measurement system for assessing diaphragm parameters and an accompanying method for measuring ultrasound-derived diaphragm parameters.ConclusionsIn this paper, we constructed a diaphragm ultrasound dataset of thickness and excursion. Based on the U-Net architecture, we developed an automatic diaphragm segmentation algorithm and designed an automatic parameter measurement scheme. A comparative error analysis was conducted against manual measurements. Overall, the proposed diaphragm ultrasound segmentation algorithm demonstrated high segmentation performance and efficiency. The automatic measurement scheme based on this algorithm exhibited high accuracy, eliminating subjective influence and enhancing the automation of diaphragm ultrasound parameter assessment, thereby providing new possibilities for diaphragm evaluation.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12931-025-03325-3.

The pulsed electro-acoustic method (PEA) is widely used both in laboratory for fundamental research and in industry for high-voltage direct current cable assessment and diagnosis. It is well known that the electrical stress in dielectrics can be influenced by space charges. In this study, we have modified and upgraded the PEA system for better resolution, safety, and measurement of the space charge distributions automatically in a solid dielectric during the application of various DC high voltages. We adapt the PCI extensions for instrumentation system with a DSO/DAQ system for automatic measurements. The system could be used to automatically measure the space charge distribution with higher accuracy under various applied DC voltages.

A new generalized large-signal measurement approach using an automatic reflection and transmission measurement system operating in stepped CW mode is presented. Combining network analyzer and sampling oscilloscope receiver features, the system measures the frequency dependent fundamental and higher harmonic amplitude and phase response of nonlinear one-port and two-port devices under sinusoidal excitation. An error model considering the tracking errors of the different measurement receivers and a corresponding calibration procedure are derived. GaAs MESFET measurement examples are given and preliminary analytic results on large-signal modeling are discussed.

An automatic emittance measurement system to characterize the transverse emittance of the electron beam produced by the BNL photocathode electron gun is described. The system utilize a VAX workstation and a Spiricon beam analyzer. A operator window (created through the Vista control software package) controls the emittance measurement system and the graphic presentation of the results. Quadrupole variation method is used for the ATF automatic emittance measurement system. A simple emittance formula was derived to study the performance of the quadrupole variation method, and compared with the ATF experimental data is also presented. >

A novel dew point measurement system based on the thermal effect of humidity sensitive thin film

Portable automatic BTX measurement system with microfluidic device using mesoporous silicate adsorbent with nano-sized pores

In this study, in order to overcome the weakness of acoustic field analysis which is generally used for ultrasonic probe performance evaluation, automatic acoustic field measurement system and evaluation parameters were proposed. The comparisons between acoustic field simulation and measured acoustic distribution data of normal and abnormal channels were conducted to evaluate the availability of proposed system and evaluation parameters. First, the impulse response characteristic of sample probe was investigated to classify the normal elements and abnormal elements. And then, normal channels and abnormal channels with abnormal element were chosen. The suggested 12 evaluation parameters were calculated using the acoustic fields of these channels. The availability of proposed automatic acoustic field measurement system and evaluation parameters was confirmed. And the performance evaluation of ultrasonic probe using acoustic field analysis could be easier and faster.

Introduction: The size of nodules in the lungs is an impor-tant criterion in deciding what further tactics to use. There are several measurement approaches: determination of maximum size, average size, nodule volume and volume doubling time (VDT). Each of these requires validity, re-producibility and accuracy, which are not always achieved in routine practice. Aim: To evaluate the performance of different programs in the automated measurement of nodules and solid masses in lung tissue and the reproduci-bility of the results. Materials and methods. To conduct a comparative evaluation of automated nodule size estima-tion, we used four software products: Program A — Vitrea (manufactured by Canon, version 6.3.2047.65), Program B — Vitrea (manufactured by Canon, version 7.14.2.227), Program C — AW Server (manufactured by GE, version 3.2 Ext.4.0), and Program D — Hiveomics Platform (Hiveomics Ltd., version 1.2). We selected 62 nodules and solid mass-es for statistical processing. Results. During the study, all software products had technological defects (unable to process the study technical/other reasons) that prevent-ed the measurement of all nodules and masses accepted for participation. Statistically significant differences were found when comparing the mean effective diameters ob-tained from the measurements. These differences were observed between automatic nodule measurement sys-tems from different manufacturers and between older generation software products and the AI algorithm. There were no statistically significant differences observed in the measurements of mean effective diameters between the AI-based automatic nodules analysis system and the re-sults obtained after physician delineation correction on earlier versions of automatic volumetry systems. Conclu-sion. The study of average volume values in all groups showed no statistically significant differences, confirming the universality of the use of this parameter in clinical practice

BackgroundWhether the in vitro fertilization (IVF) has an effect on the cardiac function of the fetus is very important to evaluate the safety of the technique. The aim of this paper is to establish normal reference range for the fetal right myocardial performance index (RMPI), and compare the reference range between IVF fetuses and spontaneous pregnancy (SP) fetuses by automatic measurement of the RMPI.MethodsThree hundred seventy-one spontaneous singleton pregnancies (the control group) and 39 singleton pregnancies conceived by IVF (the experimental group) were enrolled into the current study. An automatic measurement system was used to acquire the RMPI. The cardiac function of the two groups was compared by t-test.ResultsThere was no significant difference in normal reference range of RMPI between IVF fetuses and SP fetuses (RMPI 0.42 ± 0.05 vs 0.43 ± 0.05). No strong correlation was also noted between RMPI with gestational age and heart rate.ConclusionsNormal reference ranges of RMPI of IVF fetuses and SP fetuses were established, and no significant difference between IVF fetuses and SP fetuses in RMPI was found. Thus, these findings may suggest that IVF has little impact on cardiac function of the fetus.

An automatic measurement system has been used to measure the complex dielectric constant of solid materials at 890GHz. This instrument can be used as a two-beam interferometer for determining the refractive index or as a transmitter for measuring the absorption coefficient of dielectric materials at FIR and SMMW frequency. The results for seven low-loss solid materials and the accuracy of the measurement are presented.

High resolution simultaneous dual liquid level measurement system with CMOS camera and FPGA hardware processor

A self-calibration capability was added to the Automatic Image Measurement System (AIMS). The strategy for edge threshold selection was optimized. A horizontal optical mount was designed and built, incorporating stepper-motor control of focus and image rotation. The system was mounted on a manual positioner for inspection of features on nonplanar surfaces. Plans were developed for application of AIMS to an automatic point-location gaging system. A capability study was performed to determine repeatability of AIMS.

Harmonic-drive transmission finds many applications in industry, especially in manufacturing of industrial robots. As the key devices of an industrial robot, the harmonic drive reducers determine the robot’s performance, which includes the positioning accuracy, loading capacity, life time, etc. To satisfy the need of manufacturing high performance harmonic drive devices, development of competent measurement system is of great importance. An automatic measurement system with high-precision and multifunction is under development. The system consists of the power module, loading module, torque and rotation measuring module. The measurement and operation principle were explained. The factors affecting the accuracy of the measurement system were analysed. The control system was designed to realize the automatic loading and acquisition of torque and rotation data. The principle and measurement software of the control system were also introduced. Finally, a harmonic reducer with the gear ratio 120 was measured to verify the feasibility of the measurement system.

As an indispensable part of materials in both production and life, magnetic materials are crucial to scientific research and economic development. The magnetic properties of magnetic materials are the basis for measuring the quality of materials, and the material magnetization curve and hysteresis loop are the effective characterizations of the magnetic properties of materials. In this paper, we design a new fully automatic and high precision hysteresis measurement system based on the high precision NI PXI-4461 data acquisition card according to the requirements of the national standard GB/T 3658–2008, and realize the automatic measurement and analysis of hysteresis and magnetic parameters.