456results about How to "Signal transmission is stable" patented technology

In a flex-rigid wiring board in which a rigid substrate formed from a rigid base material and a flexible substrate formed from a flexible base material are stack-joined and electrically connected to each other, the flexible substrate including a conductive layer having interconnecting electrode pads provided on at least one surface thereof, and the rigid substrate including a conductive layer having interconnecting electrode pads provided on at least one surface thereof in a position opposite to the interconnecting electrode pads on the rigid substrate, are locally connected electrically to each other with an anisotropic conductive adhesive layer interposed between conductive layers of substrate portions each including at least the interconnecting electrode pads. In this flex-rigid wiring board, transmission of high-frequency signals can be prevented from being delayed, noises can be suppressed, and an excellent electrical connection and connection reliability be assured.

The invention discloses a connector plug, a connector socket and a connector combination of the connector plug and the connector socket. The plug and the socket respectively comprise an insulating body, two rows of contact terminals, two baffles and a shielding shell. The plug is internally provided with the upper baffle and the lower baffle for the contact terminals, and the socket is internally provided with the upper baffle and the lower baffle for the contact terminals, the baffles of the contact terminals are conducted with the corresponding shielding shells in a contact mode so as to improve the shielding effect and to ensure that contact transmission is stable. The socket baffles are provided with contact elastic sheets, when the plug and the socket are combined, the contact elastic sheets make elastic contact with the socket baffles to form a shielding protection loop, the signal interference between the different rows of contact terminals is further avoided, and the plugging force of the connector combination can be enhanced. The connector plug and the connector socket are internally and respectively provided with hook plates and partition plates to separate the two rows of contact terminals, the hook plates and the partition plates are conducted with the corresponding shielding shells in a contact mode, inverted hook parts of hooks are buckled in the concave parts of the partition plates, and the inverted hook parts are conducted with the concave parts of the partition plates in a contact mode.

A disclosed constant-voltage circuit uses a capacitor having a low ESR (equivalent serial resistance), such as a ceramic capacitor, for phase compensation, wherein a voltage drop of an output voltage due to a resistance provided for optimizing the phase compensation is compensated for by providing a current proportional to an output current to an output voltage detecting resistance through a current mirror circuit, thereby the voltage drop of the output voltage is compensated for.

The invention provides a wearable electrocardiosignal monitoring and processing method and device. Flexible fabric electrocardioelectrodes and a central control box are embedded into an elastic chest belt. The central controller comprises an electrocardiosignal collecting and conditioning unit, a signal processing unit, a data storage unit, a power unit and a wireless communication unit. The signal processing unit carries out filtering, feature extraction and analysis of the heart abnormal change state on the electrocardiosignal collected, amplified and filtered preliminarily by the collecting and conditioning unit. The signal waveform and the analysis result are sent to personal digital management equipment like a mobile phone of a user through the wireless communication unit and can be sent to a remote doctor through a network, and the doctor analyzes the illness state and feeds back medical suggestions and matters needing attentions to the user. The wearable electrocardiosignal monitoring device has the advantages of being comfortable to wear, light, small in size, low in cost and the like, long-term monitoring is facilitated under the conditions of daily life, study, activities and the like, and the intelligent diagnosis and feedback treatment of the heart state are achieved.

The invention discloses a wind tunnel dynamic force measurement test device for a canard configuration rotating missile. The device comprises a tail supporting rod, a test missile model, a steering engine driving mechanism, a force measurement balance, a fixed sleeve, an autorotation driving mechanism and a data acquisition and processing system, wherein the test missile model has a cavity and is provided with a deflectable nose control; the steering engine driving mechanism drives the nose control to deflect, and is arranged in the front of the cavity; the fixed sleeve is arranged in the back of the cavity, the rear end of the fixed sleeve is connected to the front end of the force measurement balance, and the test missile model is rotationally sleeved outside the fixed sleeve; the autorotation driving mechanism is arranged inside the fixed sleeve, and a power output shaft extends out of a front opening of the fixed sleeve and drives the test missile model to rotate; and the data acquisition and processing system is in communication connection to the force measurement balance to receive force measurement data of the force measurement balance. The device realizes autorotation of the canard configuration rotating missile and deflection of the nose control, realizes measurement of aerodynamic force and torque, and is particularly suitable for force measurement test of large length-diameter ratio test missile models in 1.2m sub-trans-supersonic wind tunnels.

A board to board connector includes a dielectric housing and a plurality of terminals. The dielectric housing has an upper surface, a bottom surface and a plurality of terminal passages which pass through the upper surface and the bottom surface. Each terminal is received in each terminal passage respectively. Each terminal has a fixed holding portion. A compressed portion extends from the lower end of the fixed holding portion. The compressed portion has a second contact portion protrudes out from the bottom surface of the dielectric housing. A winding portion extends from the upper end of the fixed holding portion. A first contact portion extends from the top of the winding portion and protrudes out from the upper surface of the dielectric housing. The board to board connector utilizes the elastic force which is supplied by the compressed portion and the winding portion to ensure the terminals contact printed circuit boards stably so as to assure the transmitting of the signal is stably.

The invention discloses a shared parking spot parking management system and method for controlling intelligent parking locks online. The system comprises an intelligent parking lock (containing a first NB-IoT DTU module, a geomagnetic sensor, a controller and a motor), a parking management cloud platform, and a mobile client. According to the method, the intelligent parking lock is connected to the parking management cloud platform by using the narrow band Internet of things NB-IoT technology, and the state information of the intelligent parking lock can be acquired and the intelligent parkinglock can be controlled online. The NB-IoT technology has the characteristics of low power consumption, low traffic, wide laying range, remote control, convenience and reliability, and the like, and facilitates the realization of parking spot sharing. The system and the method overcome the problem that the existing intelligent parking lock depends on close-range Bluetooth or ultrasonic control andthe system cannot acquire the real-time state of the parking lock, can only control the parking lock offline and cannot manage the parking lock remotely. A good solution is provided for solving the difficulty of parking in cities through shared parking spots. The system and the method are convenient to implement, and have good economic benefit and application prospect.

A transformer comprises a rectangular insulative housing, a plurality of inductive coils received in the insulative housing, and a plurality of soldering tails. The insulative housing includes a bottom wall and four sidewalls, and forms a plurality of partitions therein for receiving the inductive coils. Each inductive coil has a first wire and a second wire. The soldering tails are provided at two opposing sidewalls of the insulative housing. Each soldering tail has a soldering end at exterior of the insulative housing for electrically connecting with a PCB of a communication connector, and a wiring end at interior of the insulative housing for connecting with the first wire and the second wire of the inductive coils. The transformer is modularly produced, and is tested before it is assembled to a communication connector. Thus the manufacture process is flexible and the communication connector provides stable signal transmission.

The invention provides an anti-interference electrocardiograph detection system, a detection method, a special flexible graphene electrode, and a preparation method and the application of the special flexible graphene electrode. The anti-interference electrocardiograph detection system comprises the flexible graphene electrode, an electrocardiosignal acquiring and processing module, an impedance measurement module, an electrocardiographic wire and a signal processing module, can measure an electrocardiosignal and a motion artifact signal, and removes the motion artifact in the electrocardiosignal. The flexible graphene electrode is formed in a way that a graphene material is adhered on a sponge layer through negative pressure deposition to obtain a graphene-sponge conductive composite, a fastener is additionally added on the graphene-sponge conductive composite, and the electrocardiographic wire is fixedly connected to the graphene-sponge conductive composite through the fastener. The anti-interference electrocardiograph detection system and the detection method effectively overcome the interference of the motion artifact on the electrocardiosignal, and guarantees the instantaneity, the accuracy and the reliability of the electrocardiographic examination result; the preparation flow of the flexible graphene electrode is simple, the biological compatibility of the flexible graphene electrode is good, the service life of the flexible graphene electrode is long, and the flexible graphene electrode can be used in the anti-interference electrocardiograph detection system.

An electrical connector assembly includes a first electrical connector having conductive contacts disposed in a receiving space in an insertion end portion of a first housing. A second electrical connector includes a terminal-mounting seat disposed in a hollow second housing and mounted with conductive terminals. When the insertion end portion of the first housing is inserted into the second housing, the terminal-mounting seat is received fittingly in the receiving space in the insertion end portion of the first housing, and the conductive terminals contact electrically and respectively the conductive contacts. A fastening unit prevents relative movement between the first and second housings so as to maintain electrical contact between the conductive contacts and the conductive terminals.

The invention discloses an electroencephalogram signal wireless collecting system which comprises a control module, a wireless electrode cap module and an electroencephalogram processing module.The control module, the wireless electrode cap module and the electroencephalogram processing module are each provided with a wireless signal transmission module.The wireless electrode cap module further comprises a microcurrent stimulator, a dry electrode and an electroencephalogram resistance detecting device.The microcurrent stimulator receives a control instruction wirelessly sent by the control module and simulates the electrode to output simulation current to act on scalp.The dry electrode collects an electroencephalogram signal fed back by the scalp and sends the signal to the electroencephalogram resistance detecting device, and the signal is processed and then transmitted to an amplifier through the corresponding wireless signal transmission module to be amplified.The dry electrode structure in the electroencephalogram signal wireless collecting system is improved, the dry electrode can make tighter contact with scalp, and the signal to noise ratio is higher.

Being related to electric contact material, i.e. brush, the invention discloses brush prepared from carbon fiber, graphite, silver based composite material in optimal adaptation among conduction, intensity, and wear resistance. Characters are that raw materials of the brush include silver powder, copper powder, graphite, and copper coated carbon fiber. Comparing with products in same domestic designation, the disclosed product increases performance of frictional wear remarkably, and raises service life to 2-3 times. Controlling pressure, and pressing time, the invention controls falling over direction of carbon fiber so as to low resistivity of brush, and increase density of carrying current. The invention raises electrical and mechanical performances of composite material (resistivity 0.06-0.09 micro ohm .m), and manufactures moderated, stable thickness of oxide film on surface of collector ring.

The invention discloses a fool-proof electric connector, which comprises an insulating body, a shielding shell and a plurality of conductive terminals, wherein the conductive terminals are accommodated in the insulating body; the shielding shell covers the insulating body to form an insertion port; an avoidance notch is formed on the shielding shell; a fool-proof elastic piece is arranged in the avoidance notch; the avoidance notch comprises a first hollow-out cavity which is vertically formed and a second hollow-out cavity which is transversely formed; the first hollow-out cavity is communicated with the second hollow-out cavity; the fool-proof elastic piece comprises an elastic arm, a guide arm and a fool-proof arm; the elastic arm is formed by forward and inclined extension from the inner part of the rear end of the first hollow-out cavity along integrated vertical direction; the guide arm is formed by extension from a free tail end of the elastic arm, bending and protrusion; the fool-proof arm is formed by transverse extension from the side wall face of the elastic arm; the elastic arm and the guide arm are suspended in the first hollow-out cavity; a guide face of the guide arm extends into the insertion port; the fool-proof arm is suspended in the second hollow-out cavity; and a pressing part of the fool-proof arm extends into the insertion port.

Disclosed is a printed wiring board comprising an insulating layer having a rectangular flat shape and provided with fibers in the layer, the direction of the fiber in the layer being almost parallel to any side of the rectangle, a reference potential layer disposed on one surface side of the insulating layer, a plurality of wiring patterns for signal transmission disposed on the other surface side of the insulating layer so as to have nearly similar angles respectively with respect to the direction of the fiber in the insulating layer, and a pad portion to mount a semiconductor device, disposed on the other surface side of the insulating layer to conduct the plurality of wiring patterns.

The invention discloses an integrated intelligent fire hydrant. The integrated intelligent fire hydrant comprises a fire hydrant cap, a fire hydrant body, a connecting rod, a valve body, a valve flap,a sensor, a control unit and a monitoring terminal. The upper end of the fire hydrant body is connected with the fire hydrant cap, the lower end of the fire hydrant body is connected with the upper end of the valve body, the valve flap is arranged inside the valve body, and the lower end of the valve body is connected with a fire-fighting water supply pipe; the connecting rod is arranged inside the fire hydrant body, one end of the connecting rod penetrates the fire hydrant cap, and the other end of the connecting rod is connected with the valve flap; the sensor is arranged on the valve flap,and the measuring end penetrates the valve flap and is used for monitoring the water pressure in the fire-fighting water supply pipe; and the control unit is arranged in the fire hydrant cap and usedfor receiving the data of the sensor and transmitting the data to the monitoring terminal. By the adoption of the integrated intelligent fire hydrant, the fire hydrant is monitored in real time, andthe integrated intelligent fire hydrant has the beneficial effects of being convenient to mount, easy to use, capable of being applied under the severe environment and long in service life and can bewidely applied to fire hydrant monitoring occasions.