43results about How to "The detection circuit is simple" patented technology

A capacitance-type touch panel, allowing disturbance noise and touch detection time to be reduced and having a simple configuration, is provided. The capacitance-type touch panel including: a plurality of drive electrodes each having a strip shape; a drive control circuit performing control such that a drive signal for touch detection is selectively applied to the drive electrodes; a plurality of touch detection electrodes arranged to intersect with the drive electrodes in such a manner that capacitance is formed in each intersecting part, and each outputting a detection signal in synchronization with the drive signal; and a detection circuit detecting an external proximity object based on the detection signal. The drive control circuit controls application of the drive signal in such a manner that the detection signal is a polarity-alternating signal including a positive-negative asymmetrical signal component which is due to presence of the external proximity object.

The invention relates to an inverter used for detecting a solar cell panel and an electric network side insulation resistor and a detection method. The inverter provided by the invention comprises a boosting unit and an inversion unit, wherein the boosting unit is connected in series with the inversion unit, and a two-stage relay is arranged between the tail end of the inversion unit and an electric network, namely, an L line is provided with a relay K1 and a relay K3 which are connected in series; an N line is provided with a relay K2 and a relay K4 which are connected in series, and a relay K5 is respectively connected between the relay K1 and the relay K3 as well as between the relay K2 and the relay K4; and a common point of each relay K5 is connected with a resistor R1, and the other end of the resistor R1 is directly connected to an enclosure. According to the inverter and the method, a detection circuit is simplified, usually, the solar cell panel and the network side insulation resistor are detected simultaneously, the inverter needs at least two sets of similar circuits, and meanwhile, insulation values between the positive and negative poles of the solar cell panel as well as between the L line of an electric network and the ground, and an N line of the electric network and the ground is detected under a condition that a complicated plus circuit is not needed.

A capacitive touch keyboard includes an insulating substrate that defines a plurality of press key zones, and a first and a second conductive layers, both disposed on the insulating substrate. Each conductive layer includes a plurality of electrode lines arranged in two different directions. Each electrode line includes a plurality of electrode units connected in series. Each electrode unit is disposed at a position corresponding to a respective one of the press key zones. For each of the press key zones, the electrode units of the first the second conductive layers that are disposed therein are adjacent to each other and cooperate to form a touch sensing structure.

A detecting circuit for pixel electrode voltage of a flat panel display device, the flat panel display device having a plurality of scanning lines and a plurality of data lines crossing with the plurality of scanning lines, the plurality of scanning lines and data lines define a plurality of pixel units, and each of the pixel units including a pixel switching element and a pixel electrode. The detecting circuit for pixel electrode voltage includes at least one detecting sub-circuit for pixel electrode voltage. The detecting sub-circuit for pixel electrode voltage includes: a signal amplifying unit connected with the pixel electrode in the pixel unit, for amplifying a voltage signal of the pixel electrode; and a signal detecting unit connected with the signal amplifying unit, for detecting the voltage signal of the pixel electrode that has been amplified by the signal amplifying unit, and outputting a variation in the voltage signal of the pixel electrode with time. Compared with the prior art, the present invention has advantages of simple detecting circuit structure and accurate detection result.

A multi-threshold complementary metal-oxide semiconductor (MTCMO) bus circuit reduces bus power consumption via a reduced circuit leakage standby and pulsed control of standby mode so that the advantages of MTCMOS repeater design are realized in dynamic operation. A pulse generator pulses the high-threshold voltage power supply rail standby switching devices in response to changes detected at the bus circuit inputs. The delay penalty associated with leaving the standby mode is overcome by reducing cross-talk induced delay via a cross-talk noise minimization encoding and decoding scheme. A subgroup of bus wires is encoded and decoded, simplifying the encoding, decoding and change detection logic and results in the bus subgroup being taken out of standby mode only when changes occur in one or more of the subgroup inputs, further reducing the power consumption of the overall bus circuit.

Provided are a mutual inductance type three-phase motor current noise fault detecting method and a device for implementing the method. The detecting method comprises the steps that (1) current information of a three-phase motor is obtained through a mutual-inductance circuit of a three-phase connecting terminal through the three-phase motor; (2) a Y type circuit mathematic model of current output information is established; (3) motor current noise signals are obtained; (4) the motor current noise signals are judged, and whether the three-phase motor is in fault is determined. In addition, the invention discloses the device for implementing the method. The basic principle of the mutual inductance type three-phase motor current noise fault detecting method and the device for implementing the method is that a current mutual inductor with the same parameter specification is arranged on each leading wire of the three-phase connecting terminal of the three-phase motor, the mutual inductors form a Y type circuit, the motor current noise signals in the working condition can be obtained, and motor on-line operation fault diagnosis can be achieved according to the obtained motor current noise signals. The mutual inductance type three-phase motor current noise fault detecting method and the device for implementing the method have the advantages that the Y type circuit mathematic model is used for filtering 50Hz power frequency signals, a sampling circuit of the motor current noise signals is simple, anti-jamming capability is high, circuit device implementing is easy and economical, performance is stable and reliable, and motor on-line fault detection and diagnosis can be well achieved under an engineering environment.

The invention provides a high voltage interlock detection circuit, comprising a high voltage interlock loop circuit with a loop input end and a loop output end; and a high voltage interlock circuit with a PWM signal input end and a signal back-check input end. The PWM signal output end is in communication with the loop input through a first current limitation resistor; the loop output end is in communication with the signal back-check input end through a second current limitation resistor; the high voltage interlock circuit comprises a monitoring chip and a filtering capacitor. The monitoring chip and the filtering capacitor are in communication with the signal back-check input end. The PWM signal outputted from the PWM signal output end returns to the signal back-check input end through the high voltage interlock loop circuit and enters the monitoring chip after filtering by the filtering capacitor. According to the technical schemes of the invention, single path PWM output and a monitoring chip are adopted so as to simplify a high voltage interlock detection circuit. The MCU only detects the electric level signal outputted from a watchdog and therefore, the operational resources occupied by the MCU are reduced; and in addition, the output of MCU detection can be realized only through the use of the digital input port, therefore, reducing the requirement on the MCU hardware port resources.

The invention relates to a phase difference detection circuit and a method thereof in the signal detection field, and especially relates to a phase difference detection circuit which detects phase difference of two signals and an ahead or lagged relation of phases and a method thereof. A purpose of the present invention is to solve a problem that in the prior art detection of phase difference andan ahead or lagged relation of phases are too complex. The novel phase difference detection circuit and the method thereof are provided to accurately detect the phase difference of two signals and the ahead or lagged relation. The detection circuit is simple and reliable. A technical scheme of the invention is as follows: the detection circuit comprises a phase detection module 1, a phase detection module 2, an A/D analog to digital conversion circuit 1, an A/D analog to digital conversion circuit 2 and an FPGA processor. The invention mainly is applied to detection of phase difference of twosine waves or square wave signals and an ahead or lagged relation.

The invention discloses an average current control circuit and an average current control method. In the circuit, one input terminal of an average current detection module is connected to a reference voltage signal output terminal of a band gap reference source, and another input terminal is connected to a source terminal of a power switch. A voltage transmission signal output terminal of the average current detection module is connected to an input terminal of a current regulator. Another input terminal of the current regulator is connected to the reference voltage signal output terminal of the band gap reference source, and an output terminal is connected to a negative input terminal of a comparator. An oblique wave generator input terminal is connected to the source terminal of the power switch, and an output terminal is connected to a positive input terminal of the comparator. An input terminal of a logic and driving circuit is connected to an output terminal of the comparator, another input terminal is connected to a switch starting pulse output terminal of an oscillator and an output terminal is connected to a grid terminal of the power switch. The source terminal of the power switch is connected to a grounding terminal via a detection resistor and a drain electrode is connected to a switch power supply module. Constant current precision is high, a current ripple wave is small and anti-noise performance is superior.

The invention discloses a window type intelligent fresh air purification system. The window type intelligent fresh air purification system comprises a purification window composed of a frame A, a frame B, a frame C, a frame D and a frame E, the frame A, the frame B and the frame C are hollow rectangular frames, the frame A and the frame B are connected to the upper end and the lower end of the frame C, a communication I structure is formed by the frame A, the frame B and the frame C, the frame D and the frame E are located on the two sides of the frame C, and an air flue, a draught fan, a shutter and an outdoor exhaust opening are formed inside and outside the frame A; an air flue, a draught fan, a shutter and an indoor air inlet are formed inside and outside the frame B; the system has the beneficial effects that the ultra-high safety and the ultra-high energy saving are achieved, 24-hour all-weather purification detection is achieved, indoor environment pollution is solved, the system and a window are integrated, no space is occupied, and the system is suitable for being applied to many occasions of homes, schools, hospitals, office buildings, administration centers and the like.

The invention discloses a window-type intelligent fresh air purification system. The window-type intelligent fresh air purification system comprises an indoor intake system, an exhaust system and window borders, wherein the window borders comprise a border A, a border B, a border C, a border D and a border E; the border A is provided with an outdoor exhaust opening; the border B is provided with an indoor intake opening; an outdoor intake opening spaced by a partition is formed in the outdoor border surface of the border C; an indoor exhaust opening spaced by a partition is formed in the indoor border surface of the border C; the indoor intake system and the outdoor exhaust system are embedded in the border C; and a blower I drives indoor air to circulate outdoors, and a blower II drives outdoor air to circulate indoors to form an integral fresh air purification cycle system. The window-type intelligent fresh air purification system has ultrahigh security and ultrastrong energy saving performance, realizes 24-hour purification detection, solves the confusion of family patients with respiratory diseases, is integrated with a window to occupy no other space, is long in service life and is suitable for being popularized in schools and other more occasions.

The present invention discloses a detection circuit in the assembly process of an LCD panel. Through the testing pad collection and the switch collection, the signal line of each of the panel units connects to the corresponding testing signal pad of the testing pad collection respectively through the input terminal and the output terminal of the control switch of the switch collection, and the control terminal of the control switch electrically connects to the control signal pad in order to selectively apply an individual testing to one of the panel units. The present invention also provides a manufacturing method for an LCD panel. Accordingly, the present invention can simplify the detection circuit and reduce the load of the detection circuit.

The invention relates to a four-electrode testing device and a measuring method for the water content of tobacco. The water content of the tobacco is reflected by measuring the resistance of the tobacco through four electrodes as probes according to the specific function relationship between the resistance and the water content. The four-electrode testing device is formed in a way that a range selector is respectively connected with an electrode A, an electrode B, an electrode C and an electrode D through a singlechip computer and a resistance measuring circuit, and a PC (Personal Computer) is connected with a liquid crystal display circuit through a data uploading circuit and the singlechip computer. Compared with an infrared ray moisture meter, the four-electrode testing device disclosed by the invention has the characteristic that the measured result of the water content of the tobacco is prior to the precision and the efficiency of the infrared ray moisture meter. The influence from electrode polarization caused by measurement of single voltage through a pair of electrodes and the influence from offset voltage caused by measurement through single-direction power supply of the electrodes are overcome, so that the precision is increased; and the deviation of zone selection during measurement of a pair of electrodes is overcome, and thus the credibility of the measurement result is improved. A detection circuit is simple, the requirements on the color, shape and specification of the materials and light of a measurement environment are lower, the measurement result can be obtained more quickly and the water content inside the materials can be measured.

Provided are an electric musical instrument system and a control method thereof. The electric musical instrument system includes a musical sound transmitting means having a first mode and a second mode that consumes less electric power than the first mode. The musical sound transmitting means has a detecting means for detecting rocking of a musical instrument and a transmitting means that transmits an audio signal emitted from the musical instrument to the musical sound receiving means in the first mode and transmits, when detecting rocking of the musical instruments, detected information to the musical sound receiving means in the second mode. The musical sound receiving means has a controlling means that processes the audio signal received in the first mode and cancels the second mode and changes the mode to the first mode when the detected information is received in the second mode.

The application discloses a switch network detection system and a control method of the switch network detection system. Wherein, an embodiment of the switching network detection system includes: a first voltage measurement device, one end of which is connected to the negative pole of the battery pack or capacitor bank, and the other end is directly connected to the first output end, or connected to the first output end through a switch; Two voltage measuring devices, one end is connected to the negative pole of the battery pack or capacitor bank, and the other end is directly connected to the second output end, or connected to the second output end through a switch; the processor is connected to the first voltage measuring device and the second voltage measuring device The device is connected to determine whether the voltage measured by the first voltage measuring device or the voltage measured by the second voltage measuring device is within a preset range, and if not, it is determined that the switch network is abnormal. This embodiment realizes the detection of switch network faults, and at the same time, the detection circuit is simple, high in reliability, and strong in anti-interference ability.