55results about How to "The detection signal is accurate" patented technology

The invention discloses a seamless wireless type plate shape gauge of an entire roller, which is characterized in that a plate shape gauge detecting roller (2) detects an original plate shape signal which is transmitted to a signal processing circuit board (31) in a power self-generating signal processing and wireless emitting device (4) through a coaxial high shielded cable; and after being processed by a DSP chip, a coded digital signal packet is output by a wireless emitter (36) in the power self-generating signal processing and wireless emitting device (4) in a wireless way. After the wireless receiver (5) receives the data packet, a decoder (6) restores the received data packet and delivers the data packet a software processing system (7) for carrying out digital filtration, signal compensation, and the like on the plate shape signal so as to obtain real online plate shape data. The invention avoids scratching the surface of a band steel; a differential charge amplifier is adopted so that the plate shape gauge has fine high frequency and low frequency response characteristics; all circuits are completely sealed inside a roller body, the data packet of the plate shape signal is emitted in real time through antennae and the plate shape gauge has excellent shielding property, realizes wireless emitting and receiving of the signal, avoids slip ring type wired transmission, effectively eliminates the influence of interference factors on plate shape detecting signals and accurately detects the signal in real time so that the plate shape gauge can stably run for a long time under the a serious working condition.

An adaptive synchronous rectification control circuit and a control method are developed. The control circuit comprises an adaptive circuit that generates a reference signal in response to a detection signal of a power converter. A clamped circuit clamps the reference signal at a threshold voltage if the reference signal equals or is greater than the threshold voltage. A switching circuit generates a control signal to control a synchronous switch of the power converter in response to the detection signal and the reference signal. The control method generates the reference signal in response to the detection signal. The reference signal is clamped at the threshold voltage if the reference signal equals or is greater than the threshold voltage. The method further generates the control signal to control the synchronous switch of the power converter in response to the detection signal and the reference signal.

Keys, which are incorporated in an automatic player piano, are monitored with an optical transducer system. The optical transducer system includes sensor heads provided on both sides of the key trajectories, LEDs connected to predetermined sensor heads through optical fibers, LDDs connected to the other sensor heads through optical fibers and a controlling unit. A luminescence controller is connected to the LEDs for optimizing the luminescence, and bias controllers are respectively connected to the LDDs. The luminescence controller and bias controllers optimize the luminescence of emitted light and the bias level of electric signals so that the optical transducer system is free from the individuality of component parts and the deterioration.

The invention discloses an ignition and fire detection circuit based on a BOOST principle and a gas wall-hanging stove. The ignition and fire detection circuit comprises a controller and an ignition module; the ignition module comprises a boosting and detecting unit; and the boosting and detecting unit is connected with an external direct-current power source to be used for maintaining an ignitionpower source at a set voltage, and meanwhile a detected ignition voltage of the ignition power source is fed back to the controller. The ignition and fire detection circuit based on the BOOST principle and the gas wall-hanging stove eliminate the inductance squealing problem, a high voltage of the ignition power source is isolated from a controller chip, and the safety of the circuit is improved;the ignition module and a flame detection module share one boosting circuit, and the circuit cost is lowered; and a comparator is adopted for outputting a flame parameter signal, an I / O port connected with a flame detection signal is changed into a common detection port from an analog (AD) detection port, a detection signal is more accurate, and difficulty is greatly lowered during hardware design and software programming.

A load detecting device for a roller bearing includes: a strain gauge that is provided in a roller arranged rollably between a first bearing ring and a second bearing ring and that detects a load applied to the roller; a position detecting sensor that detects a rotation position of the roller in a revolution direction of the roller; and a data logger that is provided for the roller and that records and stores a detection signal from the stain gauge.

The invention provides a gas turbine blade defect detection technology, and relates to the technical field of gas turbine blade detection. The technology comprises the following steps: 1, making an auxiliary sample, wherein the auxiliary sample is provided with a plurality of sets of simulated defects; 2, detecting the auxiliary sample by using an array eddy current detector, and recording a detection signal obtained in the detection process; and 3, detecting the gas turbine blade by the array eddy current detector, recording a detection signal obtained in the observation and detection process, comparing the detection signal of the gas turbine blade with the detection signal of the auxiliary sample, and analyzing the position and the size of a defect on the gas turbine blade. The gas turbine blade defect detection technology can realize the nondestructive detection of the gas turbine blade, and also can clearly know the position of the defect, quantify the size of the defect and realize the qualitative diagnosis of the defect.

The invention discloses an intelligent ground wire detection device comprising an intelligent ground wire head and a matching intelligent ground wire pile. The intelligent ground wire head includes a ground wire head body and an insulating shell embedded onto the ground wire head body. A detection electronic tag module, a micro-power wireless transmitting and receiving module, a dry reed pipe, a card reading coil and a battery are embedded into the insulating shell, wherein the card reading coil is connected with the detection electronic tag module, and the micro-power wireless transmitting and receiving module is connected with the detection electronic tag module. One end of the ground wire head body is provided with a wire nose, and the other end of the ground wire head body is provided with a grounding connecting plate. The connecting plate is provided with a connecting hole. The battery is disposed above the connecting plate. The intelligent ground wire pile is connected with the intelligent ground wire head in a matching manner through the connecting hole. The intelligent ground wire head and the intelligent ground wire pile are matched with each other in use, and the state of a ground wire can be acquired in real time.

The invention discloses an electronic reconnaissance signal parameter high-precision measurement method based on an FPGA, and the method comprises the following steps: inputting two parameters, i.e.,a detection threshold setting mode and a fixed threshold value, into an upper computer, and transmitting the parameters to the FPGA through PCIe; processing the radar reconnaissance signal by an analog-to-digital converter to obtain an original digital signal, and transmitting the original digital signal to an FPGA for multi-channel data caching; performing framing processing on the original digital signal, and performing short-time Fourier transform on each frame of data; calculating a frequency power spectrum of the frequency domain data, selecting a peak value of the frequency power spectrum, comparing the peak value with a judgment threshold, and judging whether a target signal exists or not; and measuring pulse signal parameters of an enemy radar for the frequency domain data with thetarget signal. By adopting frequency domain pulse detection, the precision of parameters such as pulse width, pulse repetition period and the like can be effectively improved; through the rough measurement and accurate measurement of the frequency spectrum, a frequency spectrum measurement result with relatively high precision can be obtained at relatively low resource cost, and the real-time performance is good.

A physical quantity detecting device that can determine abnormality of a signal transmission system between a physical quantity detector and a controller and an electric power steering apparatus using the physical quantity detecting device are provided. The physical quantity detecting device includes a physical quantity detector configured to detect a physical quantity and to output a physical quantity detection signal and a controller configured to receive the physical quantity outputted from the physical quantity detector via a transmission line and to perform a control operation on the basis of the physical quantity. The physical quantity detector outputs a diagnostic signal for detecting abnormality of a transmission system between the controller and the physical quantity detector and the controller includes an abnormality determining unit configured to determine abnormality of the transmission system on the basis of the diagnostic signal when receiving the diagnostic signal.

The invention discloses a seamless wireless type plate shape gauge of an entire roller, which is characterized in that a plate shape gauge detecting roller (2) detects an original plate shape signal which is transmitted to a signal processing circuit board (31) in a power self-generating signal processing and wireless emitting device (4) through a low noise coaxial high shielded cable(30); and after being processed by a DSP chip, a coded digital signal packet is output by a wireless emitter (36) in the power self-generating signal processing and wireless emitting device (4) in a wireless way. After the wireless receiver (5) receives the data packet, a decoder (6) restores the received data packet and delivers the data packet a software processing system (7) for carrying out digital filtration, signal compensation, and the like on the plate shape signal so as to obtain real online plate shape data. The invention avoids scratching the surface of a band steel; a differential charge amplifier is adopted so that the plate shape gauge has fine high frequency and low frequency response characteristics; all circuits are completely sealed inside a roller body, the data packet of the plate shape signal is emitted in real time through antennae and the plate shape gauge has excellent shielding property, realizes wireless emitting and receiving of the signal, avoids slip ring type wired transmission, effectively eliminates the influence of interference factors on plate shape detecting signals and accurately detects the signal in real time so that the plate shape gauge can stably run for a long time under the a serious working condition.

The invention discloses an approach switch and a horizontal garbage compressor with the approach switch. The approach switch comprises a sensor (20), a switch base (30), and a contacting rod (10) which is used for contacting with the switch base (30), wherein the switch base (30) is provided with a contacting face (31) which is used for contacting with the contacting rod (10), a through hole (32) is formed in the contacting face (31), and the sensor (20) is installed inside the switch base (30) and is directed at the through hole (32). Besides, the contacting rod (10) comprises an installing seat (12), a contacting piece (11) which is used for contacting with the contacting face (31), a support (14) which is used for installing the contacting piece (11), and a clip (13) which is used for connecting the installing seat (12) and the support (14). The clip can enable the contacting piece to be pressed on the contacting face from beginning to end so as to ensure contact of the contacting piece and the contacting face, and therefore the distance between the contacting piece and the sensor is limited, the sensor is protected from collision, and the sensor can detect signals precisely can be guaranteed.

The invention discloses an ignition and fire detection circuit based on a BOOST principle and a gas wall-hanging stove. The ignition and fire detection circuit comprises a controller and an ignition module; the ignition module comprises a boosting and detecting unit; and the boosting and detecting unit is connected with an external direct-current power source to be used for maintaining an ignitionpower source at a set voltage, and meanwhile a detected ignition voltage of the ignition power source is fed back to the controller. The ignition and fire detection circuit based on the BOOST principle and the gas wall-hanging stove eliminate the inductance squealing problem, a high voltage of the ignition power source is isolated from a controller chip, and the safety of the circuit is improved;the ignition module and a flame detection module share one boosting circuit, and the circuit cost is lowered; and a comparator is adopted for outputting a flame parameter signal, an I / O port connected with a flame detection signal is changed into a common detection port from an analog (AD) detection port, a detection signal is more accurate, and difficulty is greatly lowered during hardware design and software programming.

The invention provides an automatic warning device for preventing children retained in a vehicle from suffocating. A power signal of the warning device is connected with a single-chip microcomputer system, a signal detection part is connected with the single-chip microcomputer system through a driving circuit, a wireless communication module is connected with the single-chip microcomputer system through the driving circuit, and a warning processing part is connected with the single-chip microcomputer system through the driving circuit. When the power signal acquires the information indicating that a certain index has threat, the single-chip microcomputer system is commanded to be powered on to work so as to control the signal detection part to be in a working state; and if a signal of motion of a human body is detected by the signal detection part, the single-chip microcomputer system controls the wireless communication module to notify a vehicle owner, and the single-chip microcomputer system controls the warning processing part to enable a vehicle air conditioner to work so as to give a vehicle anti-theft alarm for warning the vehicle owner and asking for help, thereby gaining time for rescue and further effectively preventing children or pets from being locked in the vehicle and suffocating.

A light detecting apparatus includes: a first photoelectric conversion element unit (110) and a second photoelectric conversion element unit (120) each of which converts input light to an electric current and output it; an optical current transducer unit (100) for outputting, as a detected current, a differential current between an electric current outputted by the first photoelectric conversion element unit and an electric current outputted by the second photoelectric conversion element unit; and a first current / voltage converting unit (200) for amplifying the detected current outputted from the optical current transducer unit, converting it to a voltage signal, and outputting the voltage signal.