806results about How to "The detection data is accurate" patented technology

The invention discloses an insulation monitoring device and method of a power cell of an electric vehicle. The insulation monitoring device comprises an electricity leakage detection circuit, a microprocessor, a signal generator and a signal collector, wherein the signal generator is connected with the chassis of the electric vehicle and the signal collector is connected with a sampling resistor. The signal generator is used for generating low-frequency voltage signals, and the signal collector is used for collecting voltage signals on the sampling resistor and transmitting the voltage signals to the microprocessor through a signal conditioning circuit; because the current flowing through the sampling resistor is the sum of the leakage current of the high-voltage system of the power cell and current generated by a low-frequency voltage signal transmitted by the signal generator, the microprocessor calculates an insulation resistance of a high-voltage system of a power cell on the chassis of the electric vehicle according to a current variation value; and when the insulation resistance of the high-voltage system of the power cell on the chassis of the electric vehicle is reduced to a preset response value, the microprocessor drives an alarming device to open and reminds a user to quickly carry out fault diagnosis, therefore ensuring the regular operation of the power cell and avoiding the potential safety hazard due to drop of insulation.

The invention relates to a system and a method for detecting detectivity of a space optical system. The system comprises a light source system, an alignment system, a star point unit, a spectrum acquisition unit, a master control system, a data processing unit and a display unit, wherein the alignment system and the spectrum acquisition unit are arranged on an emitting optical path of the light source respectively; the star point unit is arranged between the light source system and the alignment system, and lies on a focal plane of the light source system; a space optical system to be detected is arranged on the emitting optical path behind the alignment system; the data processing unit is respectively connected with the display unit and the space optical system to be detected; and the master control system is respectively connected with the space optical system to be detected, the light source system and the spectrum acquisition system. The invention provides a system and a method for detecting detectivity of a space optical system, which are capable of reliably and accurately acquiring detection data and are convenient for operation.

The invention provides a laser radar light path system which is used in the field of laser radar ranging. The system comprises a transmitting system body and a receiving system body. The transmitting system body is used for transmitting laser signals to target objects; the receiving system body is used for receiving laser echo signals reflected from the target objects, and comprises a main receiving lens used for focusing the first laser echo signals reflected from the target objects, a compensating mirror and a photoelectric detector, wherein the compensating mirror is arranged on the main receiving lens and used for compensating the second laser echo signals reflected from the target objects in a measuring blind zone of the main receiving lens, and the photoelectric detector is used for receiving the focused first and second echo signals and outputting corresponding electrical signals so as to obtain distance information of the target objects. Ranging of far objects and ranging of close objects can be achieved at the same time by arranging the compensating mirror on the main receiving lens, the detection range is larger, the detection data is more accurate, and the radar measuring blind zone caused by a non-coaxial optical system can be eliminated.

The invention discloses a wearing state detecting method for intelligent wearable equipment. The method comprises the following steps of acquiring a non-wearing reference value by the intelligent wearable equipment; reading a contact capacitance value between the intelligent wearable equipment and a user when the user gets in contact with the intelligent wearable equipment during each cycle every other predetermined period of time, and calculating a difference value between the contact capacitance value and the non-wearing reference value; if the difference value is within a first preset range during a predetermined wearing detection times, judging the intelligent wearable equipment to be in the wearing state. The invention also discloses a wearing state detecting device for the intelligent wearable equipment. According to the invention, the wearing state of the intelligent wearable equipment is accurately detected, so that accurate detection data are provided. Therefore, the user experience is improved.

The invention provides a gas valve provided with a pressure measuring device, pertaining to the technical filed of machinery and solving problems such as small application scope caused by inconvenient pressure measurement as the pressure measuring device of the current gas valve provided with a pressure measuring device cannot rotate. The gas valve provided with the pressure measuring device consists of a valve body provided with an air inlet pipe and an air outlet pipe, a valve stem and a valve core which is arranged in the valve body. One end of the valve stem is connected with the valve core while the other end thereof passes through the valve body; the air inlet pipe is provided with a pressure measuring hole, the outside of the air inlet pipe is provided with the pressure measuring device, a valve sleeve is arranged and axially fixed on the air inlet pipe and can rotate along circumferential direction, the pressure measuring device is fixedly connected with the valve sleeve, and a connection structure which ensures that the valve sleeve and the air inlet pipe are mutually sealed and that the pressure measuring hole and the pressure measuring device are always communicated when the valve sleeve rotates along the air inlet pipe in a circumferential manner is positioned between the valve sleeve and the air inlet pipe. The gas valve provided with the pressure measuring device is characterized by simple structure, good sealing performance, wide application scope and being capable of measuring the pressure of the gas of the pipe at any angle.

The invention relates to a fast and accurate beef quality detection system and method to solve the problems of subjective and inaccurate detection of beef quality and complex detection process of detection equipment in the prior art. The system comprises a seat body, the seat body is provided with a bracket, and an irradiation light source is arranged above the bracket. The irradiation light source is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is installed on the seat body. A receiving mechanism is disposed below the bracket, and a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef quality can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

A detection device of a multi-layer nanometer film tunneling micro-gyroscope consists of a glass substrate, a fixed electrode cathode, a comb electrode anode, a sensitive mass block, a fixed seat, a fixed comb, a damping hole, a detection beam, a driving beam, a connecting block, a tunneling device, and a nano film, wherein a fixed seat and a comb are mounted on the sensitive mass block, the detection consists of the detection beam, the driving beam and the tunneling device, the tunneling device consists of a substrate, an insulating layer, an electrode and a nano film, the fixed electrode cathode and the comb electrode anode are mounted on the glass substrate, the damping hole comprises 96 square via holes, the tunneling device can form a multi-barrier pressure sensitive structure because of the nano film, and the sensitivity of the silicon piezoresistive pressure sensor can increased by 1-2 order of magnitude. The device has reasonable and compact structure, convenient detection, high detecting precision, high sensitivity and high resolution, which is not effected by temperature. Compared with prior art, the detection precision is increased by 2-3 times, the detection data is detailed, accurate and reliable.

The invention relates to the field of agriculture, in particular relates to the field of utilization of straw, and more in particular relates to a detection method of a straw phenolic acid compound. In accordance with main phenolic acid substances in straws from different sources, namely gallic acid, protocatechuic acid, gentisic acid, p-hydroxybenzoic acid, chlorogenic acid, vanillic acid, caffeic acid, syringic acid, p-coumaric acid, ferulic acid, sinapic acid and salicylic acid, a reverse-phase high performance liquid chromatography detection method which is capable of achieving separation and detection in one time in a relatively comprehensive manner is disclosed, and the method can be used for keeping the relative standard deviations (RSD) of retention times and peak areas of 12 phenolic acids respectively within 0.01-0.1% and 0.25-2.26%, showing good reproducibility; the minimum detection limit is 0.005-0.01ug/ml; and the method is reliable and effective.

The invention provides a measuring device used for measuring the volume elastic modulus of a solid buoyant material. The measuring device comprises a bearing device, a pressure-regulating deice and a measurement control device. The bearing device comprises a hydraulic cylinder and a hydraulic cylinder cover; a pressure meter and a pressure-regulating valve are arranged on the upper part of the hydraulic cylinder cover; the pressure-regulating device comprises a hydraulic pump and a corresponding plunger; the lower end of the hydraulic pump is communicated with a water supply; the upper end of the plunger is connected with a motor; the measurement control device comprises a programmable controller, a pressure sensor and a linear scale; the pressure sensor and the pressure meter are arranged on a pipeline communicating the hydraulic cylinder and the hydraulic pump; the finger of the linear scale and the plunger moves synchronously; and the pressure sensor, linear scale and motor all can be controlled by the programmable controller. The invention also discloses a test method used for solving the problem in the prior art that the volume elastic modulus cannot be measured. The invention is provided with the guidance for the study of solid buoyant material.

The invention discloses a metal plate defect online detection method and metal plate defect online detection device. Based on the fact that the heat conductivity of a homogeneous metal plate and the heat conductivity of internal holes, air bubbles or other impurities are different and the fact that the metal plate has a higher heat conductivity and higher heat conducting speed, when the metal plate is instantly sprayed with a cooling or heating medium at a certain temperature, the part, without defects, of the metal plate can restore the temperature quickly and has a uniform infrared image and no abnormal spots, while the part with defects of internal holes, air bubbles or impurities have abnormal spots due to the deference between the heat conductivity of the holes, air bubbles or impurities and the heat conductivity of the metal plate. The metal plate defect online detection device consisting of thermal infrared imagers, a cooling or heating medium spraying or blowing device and a digital program control device synchronously performs control, captures an infrared image and compares and analyzes the obtained infrared image at a fixed time according to preset process steps and canaccurately and conveniently detect the defects including through holes in the metal plate on line.

The invention relates to a beef freshness rapid detection system and method to solve the problems of subjective and inaccurate detection of beef freshness and complex detection process of detection equipment in the prior art. The system comprises a seat body, the seat body is provided with a bracket, and an irradiation light source is arranged above the bracket. The irradiation light source is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is installed on the seat body. A receiving mechanism is disposed below the bracket, a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef freshness can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention discloses an LED on-line detection control system for detecting and controlling all display terminals on line, which comprises a display unit, a control unit, a detection unit and a judging unit; the control unit is connected with all elements of the display terminals for sending control signals; the detection unit is connected with all elements of the display terminals for detecting the circuit parameters and the signal parameters of all the elements to generate detection data; the judging unit is provided with a first judging module and a second judging module; the first judging module is used for judging whether connection faults or unit faults occur according to the detection data; the second judging module is connected with the first judging module for judging whether signal faults occur; the control unit generates fault state data according to the judging results; and the display unit serves as a man-machine operation display interface for sending video files, receiving the fault state data and displaying the fault states. The LED on-line detection control system has the advantages of precise detection data, accurate judging results, good detection effect and high control intelligent level.

The invention relates to a fast and accurate beef quality detection system and method to solve the problems of subjective and inaccurate detection of beef quality and complex detection process of detection equipment in the prior art. The system comprises a seat body, which is provided with a bracket. An irradiation light source is disposed over the bracket and is rotatably connected to an adjustment mechanism for adjusting the position of the irradiation light source, and the adjustment mechanism is mounted on the seat body. A receiving mechanism is disposed below the bracket, and a control unit is disposed in the seat body and is in connection with the irradiation light source, the adjustment mechanism and the receiving mechanism. By analyzing sample reflection or transmission spectrum data, the beef quality can be judged. By adopting the spectrum detection mode, nondestructive detection can be carried out on samples. The device structure is simple, the operation is fast and simple, and the detection data are accurate.

The invention relates to a green tea quality analysis apparatus based on an intelligent electronic nose system, and a method. In the prior art, detection on volatile gases in beverage samples is performed through human body organs, such that technical problems of subjective difference and harm on human body exist. A purpose of the invention is to solve the technical problems in the prior art. The apparatus comprises a gas collection unit, a gas sampling unit, a treatment unit and a control unit, wherein the gas collection unit comprises a gas chamber, a sample chamber, a first communication pipe and a second communication pipe, the gas chamber, the sample chamber, the first communication pipe and the second communication pipe form a loop-shaped circulation path, the gas sampling unit is connected with the gas chamber, the treatment unit and the gas sampling unit are connected, and a gas inlet mechanism, a gas outlet electromagnetic valve and the gas sampling unit are respectively connected with the control unit. According to the present invention, the electronic nose system is built, such that the detection result is comprehensive and objective, and hazard of sample gas on human health is avoided; and gas is subjected to circulation flow during gas sampling, such that gas mixing is uniform, and detection data is accurate.