77results about How to "Accurate and stable measurement" patented technology

The moisture content of soil may be determined using a swept-frequency microwave-based process and device. The process includes the steps of: producing a primary microwave signal with a varying frequency, splitting the primary signal to provide first and second microwave signals, which first signal is transmitted through an electric conductor in the soil where it will be delayed in proportion to the dielectric constant of the soil, while the second signal provides an internal reference signal, receiving a third signal which includes the first signal after it has passed through the electrical conductor, mixing the third signal together with the second signal, generating a mixed signal, filtering the mixed signal to remove upper side-band interference signals, generating a filtered-mixed signal, measuring the frequency of the filtered-mixed signal and calculating the moisture content of the soil.

The invention discloses a pulsimeter based on a graphene edge embedded type nano-film photoelectric sensor. The pulsimeter comprises an infrared light source unit for fixing a finger, to be detected, of a user and emitting infrared light of a specified wavelength to penetrate through the finger of the user; a photoelectric sensor unit for collecting an infrared light signal and generating a photoelectric signal according to the infrared light signal, wherein a graphene edge embedded type nano-film is grown on the surface of a silicon substrate of the photoelectric sensor unit through ECR plasma irradiation; a rectifying and amplifying unit for rectifying and amplifying the photoelectric signal to obtain a rectified and amplified signal; and a signal acquisition unit for acquiring and storing the rectified and amplified signal. According to the pulsimeter, by capturing photogenerated electrons with a boundary quantum well, recombination of photogenerated electron-hole pairs can be reduced greatly, the photoresponse rate can be increased, and human fingertip pulse signals can be measured more accurately and stably.

The invention discloses a multi-grating projection binocular vision tongue body surface three-dimensional integral imaging method. The imaging method comprises the steps of taking a first camera and asecond camera as a binocular camera; through distortion correction of first and second projectors and image pixel matching of the two projectors, enabling the two projectors to be equivalent to a large field-of-view projector to cover large field-of-view gratings on the upper surface and both side surfaces of a tongue; enabling the first camera and the second camera to constitute two sets of grating measurement systems respectively with the first projector and the second projector to collect three-dimensional information of the two side surfaces of the tongue; and enabling the first camera and the second camera to form a binocular stereo vision system on a field-of-view overlapping region of the upper surface of the tongue, and matching phases with the same name points to accurately and stably measure upper surface morphological features of the tongue. The method of the invention ensures the measurement speed and reduces the noise interference of the measurement data by utilizing thecharacteristics of modulation of the grating phase information, thereby realizing fast and accurate acquisition of the three-dimensional morphological data.

A downhole fluid properties optical analysis probe (1) to analyze at least one property of a multiphase flow mixture (100) flowing in a hydrocarbon well (51) has an elongated cylindrical body shape and comprises an optical tip (5) at one end of the elongated cylindrical body arranged to be in contact with the multiphase flow mixture (100), and an optoelectronics module (11) at another end of the elongated cylindrical body arranged to be separated from the multiphase flow mixture (100) and coupled to the optical tip (5) by an optical fiber bundle. The optoelectronics module (11) comprises at least one light source (13) arranged to emit electromagnetic radiations in a wavelength range such that reflectance occurs when gas (G) is present at the optical tip (5) and fluorescence occurs when oil (O) is present at the optical tip (5), at least one reflectance light detector (14) arranged to be responsive to a reflectance light and to provide a reflectance signal (U1(t)) and at least one fluorescence light detector (15) arranged to be responsive to a fluorescence light and to provide a fluorescence signal (U2(t)). The optical fiber bundle comprises at least one first optical fiber (6) coupling the light source (13) to the optical tip (5), at least one second optical fiber (7) coupling the optical tip (5) to the reflectance light detector (14), and at least one third optical fiber (8) coupling the optical tip (5) to the fluorescence light detector (15), the at least one first, second and third optical fibers being mounted together into a protective tube (9) resistant to downhole conditions.

The invention discloses a mechanical equipment angle detection device. The device comprises a bending plate, an angle sensor, a connecting rod and a pull rod assembly; the angle sensor is fixedly mounted on the bending plate; one end of the connecting rod is connected with a mandrel of the angle sensor; the other end of the connecting rod is connected with the pull rod assembly; the connecting rodand the pull rod assembly are assembled at an obtuse angle; the pull rod assembly and the connecting rod can relatively rotate around a connecting point; and when the device is used for detecting anangle of rotation of second equipment around first equipment, the other end of the bending plate is connected with the first equipment, and the other end of the pull rod assembly is connected with thesecond equipment. The angle of the to-be-detected equipment is detected in a manner of combining the connecting rod with the pull rod assembly between the angle sensor and the to-be-detected equipment; the connecting rod and the pull rod assembly are assembled at the obtuse angle; the pull rod assembly and the connecting rod can freely rotate around the connecting point; and when the angle sensorhas an installation coaxiality error, the connecting rod and the pull rod assembly can be adjusted in distance by changing the angle, so that the angle sensor is prevented from being damaged by shearing force.

The invention provides a cable measurement device. A fixed roll and a measurement roll parallel to each other are arranged in an outer frame. A movable shaft can slide along a fixed rod. A clamping spring is connected between one end part of the movable shaft and the outer frame on the outer side of the movable shaft. Clamping rollers arranged in parallel and in pairs is arranged on a plane defined by the fixed shaft and the movable shaft. Two ends of the clamping rollers in pairs both penetrate through a support frame and can slide towards each other. One movable roller is provided with a displacement sensor and is also provided with a length sensor and a measurement circuit. According to the invention, stable and accurate measurement of a cable metering device can be realized; cable release from the metering device when penetrating through the metering device quickly can be prevented during real time measurement of cable length and wire diameter of the cable penetrating through. Besides, the device is small in size and low in weight. The cable can penetrate through the device flexibly without obvious resistance. Offset is not caused in long term large scale measurement and measurement inaccuracy caused to cable jitter can be prevented. Measurement data can be uploaded for centralized analysis and management.

The invention provides an ultrahigh voltage DC lightning arrester leakage current online detection method by using a cloud technology. The following steps are respectively completed by using a detection system: a. whether signal acquisition of current is performed is judged; b. signal acquisition of current is performed; c. the acquired signals are processed and then current value data are formed and outputted; d. the acquired current data are wirelessly transmitted to a central monitoring device to be summarized; and e. the central monitoring device displays the current data and allocates and transmits the current data to the mobile terminals of corresponding lightning arrester managers simultaneously. Online acquisition of the microampere order of magnitude of weak circuit signals can be performed, and change of leakage current, harmonic wave and static electricity in the DC lightning arresters can be monitored anytime via the central monitoring device by depending on the cloud technology so that damage and casualties of buildings and people and animals can be effectively eliminated, and the service life of the lightning arresters can be prolonged.

The invention relates to a non-suspended infusion control system and an infusion method thereof. The non-suspended control system comprises multiple non-suspended infusion devices (1), infusion control devices (2) which are detachably connected and a control side (3), when the body temperature, the pulse frequency, blood glucose data and blood pressure data measured by a physiological parameter measuring device (27) correspondingly exceed a body temperature range, a pulse frequency range, a blood glucose data range and a blood pressure data range, or when the control side (3) receives a stopping signal or a gas prompting signal, a processing unit (34) sends the stopping signal to a peristaltic pump (5) within a predetermined time to make the peristaltic pump (5) stop infusion and give outan alarming signal, and by means of the processing unit (34), liquid in an infusion medicine bottle is maintained within the infusion temperature range, and the medicine liquid pumping speed is maintained within the infusion speed range.

The invention relates to a transfusion control system and its transfusion method. The system comprises multiple suspending type transfusion devices (1), a transfusion control device (2) and a controlend (3); the transfusion control device (2) and the control end (3) are detachably connected to each other; when a physiological parameter measuring device (35) measures any one or more of human bodytemperature, impulse frequency, blood pressure data and/or blood sugar data correspondingly beyond a human body temperature zone, an impulse frequency zone, a blood data zone and a blood sugar data zone, or when the control end (3) receives first, second and/or third signal, a processing unit (41) sends an interrupted signal to a transfusion flow control device (26) within a preset time, thus thetransfusion flow is interrupted and a reminding signal is sent; through the processing unit (41), the fluid in the transfusion drug bottle keeps constant temperature in the transfusion temperature zone, and the drop speed data of the liquid drop in a Murphy drop pipe (6) is constant in the transfusion speed zone.

A weight checking machine comprises a machine frame, a weight checking mechanism, a shifting mechanism and a removing mechanism. The weight checking mechanism is installed on the upper plane of the machine frame and used for detecting the weight of conveyed products. The shifting mechanism is installed at the top end of the machine frame and used for shifting the products to make the products move forwards. The removing mechanism is installed at the output end of the machine frame and used for removing unqualified products. According to the weight checking machine, unpowered inertia weight checking and small-friction inertia conveying are adopted, checking is accurate, stable and high in speed, and the weighing speed of the weight checking machine is twice that of a traditional weighing machine on the premise of guaranteeing precision. The weight checking machine is simple in structure, easy to operate and stable in performance.

When measurement is conducted using a measurement system utilizing a tracking-type laser interferometer, laser light is emitted at a retroreflector, the tracking-type laser interferometer is placed in a tracking state, and a displacement body is displaced to a desired point and a combination of position data of the displacement body at a single desired location and rotation position data of a biaxial rotation mechanism from the tracking-type laser interferometer is stored. When a received light determiner determines that there is an abnormality in an amount of light, the positions of the displacement body and the biaxial rotation mechanism are maintained, and the displacement body and biaxial rotation mechanism are displaced to the respective stored, predetermined positions. When the abnormality in the amount of received light is eliminated after displacement, the tracking-type laser interferometer is placed in the tracking state and measurement is restarted.

The invention discloses complete equipment for preparing liquefied consolidated soil from waste residue soil and a construction method of the complete equipment. The complete equipment comprises a screening device, an ingredient conveying device, a material storage device, a material conveying device, a stirring device, a finished product material temporary storage bin, a pumping device, a finished product material conveying pump and a control device. The discharging end of the screening device is connected with the feeding end of the ingredient conveying device. The discharging ends of the ingredient conveying device and the pumping device are both connected with the feeding end of the stirring device, the discharging end of the stirring device is connected with a feeding port of the finished product material temporary storage bin, a discharging port of the material storage device is connected with a feeding port of the material conveying device, and a discharging port of the material conveying device is connected with the ingredient conveying device. The finished product material conveying pump is connected with a discharging port of the finished product material temporary storage bin through a pipeline, and the screening device and the ingredient conveying device are arranged in a radial offset mode. In general, the complete equipment for preparing the liquefied consolidated soil from the waste residue soil and the construction method of the complete equipment have the advantages of being convenient to use, accurate and stable in metering, small in operation difficulty, short in construction period and good in construction quality.