41results about How to "Avoid car accidents" patented technology

Disclosed is a throw-out intelligent detection device and method. A throw-out intelligent detection device and method comprises an intelligent detection module, a display module, and a warning module. The intelligent detection module monitors and collects traffic conditions of tunnels and roads in real time, and transmits the traffic conditions to the display module, meanwhile, an internally embedded intelligent chip processor processes and judges a video image signal information through a background modeling step, a foreground detection step, a protected zone setting step, a foreground matching and updating step, and a throw-out judging step; if the throw-out exists, the display module displays the information of the throw-out in real time and sends a warning signal to the warning module, so as to remind the monitoring personnel to deal with the throw-out, thereby avoiding an accident. The throw-out intelligent detection device and method is not only able to intelligently detect the information of the throw-out, but the detection method is also able to avoid underreporting and false alarm at a certain degree, thereby providing an effective and executable solution for ensuring the traffic safety and the traffic order.

The invention discloses a vehicle alarm system which comprises a DSP control chip, a detection unit and an alarm unit. The detection unit judges whether a moving target exists in a preset scope at back of a vehicle or not according to a detection command of the DSP control chip, the moving target is detected when the detection unit judges that the moving target exists in the preset scope, and a first detection signal obtained by detection is supplied to the DSP control chip through the detection unit; the DSP control chip judges whether a door opening early alarm is required or not according to the first detection signal provided by the detection unit, and a door opening alarming signal is supplied to the alarm unit through the DSP control chip if the DSP control chip judges that the door opening early alarm is required; the alarm unit gives an alarming prompt to a user in the vehicle according to the door opening alarming signal provided by the DSP control chip. According to the vehicle alarm system, vehicle accidents caused by vehicle door opening ate avoided, and the use safety performance of the vehicle is improved. In addition, a passenger is not required to watch the state at back of the vehicle before getting off the vehicle, and better riding comforts are provided for the passenger.

The invention discloses an electric folding door and a protecting method and system thereof. The method includes acquiring image frames of videos collected by at least two sets of video collection modules in a monitoring area in real time, determining track targets in current image frames which are acquired in real time, and judging whether the track targets are positioned within a preset alarming distance or not; if yes, whether the electric folding door is in a being-closed state or not; if the electric folding door is in a being-closed state, sending a braking instruction to a driving control system of the electric folding door through a communication module, wherein the braking instruction is used for indicating that the driving control system stops driving the electric folding door. By the scheme, the videos of the monitoring area are collected in real time, analysis results of the image frames collected on the basis of multiple modules are sent to the driving control system of the electric folding door, running of the electric folding door can be stopped when distance between an obstacle of the electric folding door is smaller than a preset threshold value, and person clamping or vehicle clamping accidents can be avoided.

The present invention discloses a TPMS system, which comprises a tire pressure monitoring sensor, wherein an acceleration threshold, a high pressure threshold, a low pressure threshold, a gas leakage threshold, a temperature threshold and a voltage threshold are set, the tire pressure monitoring sensor cyclically detects the tire pressure, the temperature and the power supply voltage according to a first preset time when the measured speed is smaller than the acceleration threshold, the tire pressure monitoring sensor sends alarming information to a tire pressure monitoring controller if a preset alarming condition is met, the alarming information is sent to a vehicle-mounted instrument panel to perform acousto-optic alarming when the ignition switch of an engine is positioned at the ON file, the tire pressure monitoring sensor cyclically detects the tire pressure, the temperature and the power supply voltage according to a second preset time when the measured speed is larger than the acceleration threshold, the tire pressure monitoring sensor sends alarming information if the preset alarming condition is met, and the tire pressure monitoring controller sends the alarming information to the vehicle-mounted instrument panel to perform acousto-optic alarming. With the TPMS system and the control method of the present invention, the working condition monitoring can be performed on the tire and the alarming information can be sent when the vehicle is in the stationary state so as to avoid the security loophole.

The invention discloses an automobile emergency brake risk-avoiding device for braking by using a jack, which is used for accelerating emergency stop of an automobile by using a sliding friction piece. Electric hydraulic jacks are fixed below two rear axle bearing beams of the automobile respectively; telescopic column jacks of the electric hydraulic jacks face the ground; the top surfaces of the telescopic column jacks are provided with steel plates; a wear-resistant rubber gasket is fixed on one side of the steel plate which is contacted with the ground; an electric switch is connected in series between a power supply and each electric hydraulic jack; and the electric switch is arranged in an automobile cab. The invention has the advantages that: a novel technical scheme for stopping the automobile without braking wheels is provided; a novel way is provided for the braking technology of the automobile; the automobile emergency brake risk-avoiding device has important technical significance and social benefit; and if the technical device is applied to the conventional automobile, thousands of traffic accidents can be avoided every year, thousands of people can be prevented from dying in the traffic accidents, and a large quantity of economic losses can be avoided.

The invention relates to a pressure-triggered switch type accelerator pedal system for preventing an accelerator from being used as a brake, which belongs to an accelerator system capable of directly acquiring a false accelerator stepping signal. A pressure-triggered switch is arranged on the front or back of an accelerator pedal or on a body part corresponding to the accelerator pedal, and the pressure-triggered switch is a switch which enables two conductive contacts to be in contact with each other to conduct electricity after an elastic element in the switch is deformed by switch threshold pressure, the position where the pressure-triggered switch is arranged ensures that a switch threshold corresponds to a false stepping threshold, and the pressure-triggered switch is connected with a trigger signal converter. The pressure-triggered switch type accelerator pedal system has the advantages that: the pressure-triggered switch type accelerator pedal system can directly acquire the false accelerator stepping signal, and does not need a pressure sensor with a microelectronic circuit to analyze accelerator stepping acts with different weights to find out false accelerator stepping acts, the response of the system is quick, the structure is simple, the cost is low, the size is small, and the system is easy to mount, and is a highly-reliable accelerator system which can directly acquire the false accelerator stepping signal.

The invention relates to an accelerator pedal system with a tension trigger switch for correcting the wrong use of an accelerator as a brake and belongs to an accelerator system capable of directly acquiring mistaken accelerator pedaling. A front side of a back side of the accelerator pedal is provided with the tension trigger switch, or a vehicle body part, which is far away from the accelerator pedal, is provided with the tension trigger switch, after an elastic element in the tension trigger switch is deformed by the tension of a switch threshold, two conduction contact elements of the switch can be contacted to produce conduction connection, the position of the tension trigger switch makes the switch threshold and a mistaken pedaling threshold corresponding, and the tension trigger switch is connected with a trigger signal converter. The system has the advantages that a mistaken accelerator pedaling signal can be directly acquired, a tension sensor with a micro electronic circuit is not needed for analyzing different degrees of accelerator pedaling to find out mistaken accelerator pedaling action, and the system has a simple structure and a small size, is fast in response and low in cost, is easy to install, and is the accelerator system which has good reliability and directly acquires the mistaken accelerator pedaling signal.

The invention provides a method for detecting whether a coke tank has coke or not. The method comprises the following steps: a) uniformly mounting a plurality of charge level indicators along the circumferential direction of the top of a dry quenching furnace, and carrying out detecting by using the charge level indicators after a dry quenching crane fills the dry quenching furnace with red coke so as to obtain the values of coke levels in the dry quenching furnace, wherein the height of coke in the dry quenching furnace rises by 450 to 500 mm after one filling operation, and an alarm signal is given out if a coke level in the dry quenching furnace rises by less than 300 mm after filling of the red coke; and b) when the crane rises to the top of a head mast, allowing the crane to stop at the position for a plurality of seconds, weighing total weight by using a crane weighing system, recording the total weight, then allowing the crane to stop for a plurality of seconds again after the crane charges red coke into a red coke tank and returns to the top of the head mast, then carrying out weighing, and subtracting the weighing data of the crane before charging of red coke from the weighing data of the crane after charging of red coke so as to obtain the amount of charged red coke, wherein if the amount of charged red coke is greater than a set value, it is indicated that all the red coke is charged, or if the amount of charged red coke is less than a set value, it is indicated that residual red coke exists, and an alarm signal is give out to inform operation staff of carrying out confirmation.

The invention provides an anti-rolling device for electric locomotive in a shield tunnel. The device is arranged at the position, facing the end part of a rear wheel, of a motor base, above a track.the anti-rolling device comprises two brake assemblies and two telescopic assemblies, each telescopic assembly is fixed with the motor base of the tail part of the electric locomotive, each telescopic assembly includes a cylinder and a telescopic rod, The brake assembly is positioned directly above the two rail strips, and the telescopic rods of the two telescopic assemblies are respectively threaded in the two brake assemblies, and the telescopic rods are controlled to contract by the cab, and the brake assembly falls off the telescopic rods and onto the rail strips to brake the electric locomotive. As that anti-rolling device of the shield tunnel electric locomotive is simple in structure, economical and practical, convenient in installation and disassembly, the electric locomotive is safer to travel, the brake is quick and effective, and the electric locomotive roll injury accident is effectively avoided. The electric locomotive anti-rolling device of the shield tunnel electric locomotive is simple in structure, economical and practical, convenient in installation and disassembly.

The invention relates to a width and height limiting device of a road and belongs to the technical field of highway engineering auxiliary equipment. A vehicle running on the road passes through measurement devices first; height detectors on vertical brackets of the measurement devices detect the height of the vehicle; width detectors detect the width of the vehicle; speed measurement devices measure the running speed of the vehicle; a control system analyzes data measured by the measurement devices; when the height or the width of the vehicle is detected to be greater than the height or the width of the limiting device, visual alarms on the limiting device flash; and warming signs are displayed on display screens at the same time to remind a driver that the vehicle cannot pass. The speed measurement devices are arranged on the measurement devices; the speed of the vehicle passing through the road is limited by the speed measurement devices; at the same time, the driver is reminded to be aware of the limiting device ahead; and a phenomenon that the driver cannot pass, brake the vehicle or change a lane timely due to the too high running speed of the vehicle is avoided.

The invention discloses a careless accelerator stamping error correcting system fast executing emergency braking through a steering system oil pump. The careless accelerator stamping error correcting system fast executing emergency braking through the steering system oil pump can directly convert a careless accelerator stamping signal to the process that a braking machine is driven to execute braking motion. A braking oil outlet pipe of a master braking pump is communicated with a steering oil outlet pipe of a normal-state high-pressure oil tank of a hydraulic power-assisted steering system through an emergency braking oil pipe; an oil outlet electric valve is connected to the emergency braking oil pipe in series; a backflow-preventing electric valve is connected in the braking oil outlet pipe in series; a switch controller is further and respectively connected with the oil outlet electric valve and the backflow-preventing electric valve. The careless accelerator stamping error correcting system fast executing emergency braking through the steering system oil pump has the advantages that emergency braking motion is directly controlled by a careless accelerator stamping sensor without braking pedals or the master braking pump and is therefore fast, and car accidents caused by careless accelerator stamping can be better reduced and can be even avoided. The braking pedals do not need pulling, and the careless accelerator stamping error correcting system fast executing emergency braking through the steering system oil pump is not limited by car types and is installed in a unified mode.

The invention relates to an automotive transmission part of the transport vehicle technique, in particular to an intelligent maintenance type crossed shaft universal joint. The intelligent maintenance type crossed shaft universal joint comprises a crossed shaft, bearing sleeves, framework oil seals and roller pins, wherein the bearing sleeves, the framework oil seals and the roller pins are arranged on shaft heads of the crossed shaft. Through holes where lubricating oil is poured are formed in the crossed shaft. Wireless wafer sensor assemblies are further arranged on the end faces of the shaft heads. By the adoption of the intelligent maintenance type crossed shaft universal joint, the working states of the shaft heads of the crossed shaft universal joint can be detected in real time, and the detected condition is sent to a receiver arranged on an instrument panel of a vehicle; and in this way, once the shaft heads of the crossed shaft universal joint break down, the receiver arranged on the instrument panel of the vehicle can send out a corresponding signal to remind a driver to pay attention to universal joint maintenance, and accordingly the problem that traffic accidents are caused by the failure of the universal joint can be solved to the greatest extent.

The present invention provides a monitoring alarm for preventing tyre from explodeing. The monitoring alarm consists of a monitoring mechanism, a turning mechanism and a security mechanism, wherein, the monitoring mechanism consists of a host case (1), an arm for transducing (2), a probe head, etc. The host case (1) is connected to the center of the arm for transducing (2) through a connection shaft (7); the probe head (3) is positioned on the lower part of the arm for transducing (2); a moving contact assembly is positioned on the upper part of the arm for transducing (2); a fixed contact assembly which is corresponding to the moving contact assembly is positioned on the upper end of the host case (1). The turning mechanism consists of a U-shaped installing board (20), a turning main shaft (21) and a turning machine spring (22), etc. The security mechanism consists of an upright handspike, a locating block (27) and a transverse handspike (32) etc. The device in the present invention can also detect the deformation state of the running tyre and display different states of normal, air leakage, serious air leakage and different states in a high voltage, also the damage to the monitoring mechanism by the barriers in the front, back and lateral of the wheel can be avoided.

The invention discloses an intelligent safety environment-friendly electric vehicle chargeable in running. The electric vehicle refers to an electric car, an electric coach, an electric bus, an electric truck or the like. Electromagnetic induction transmitting coils are buried under various road surfaces of expressways, urban highways, urban and rural roads and the like, and upper surfaces of the coils are marked with striking driving guide lines. Three technical schemes are provided for an electromagnetic induction receiving coil on the electric vehicle, wherein a first technical scheme includes that a round wheel with a round electromagnetic induction receiving coil rolls on the electromagnetic induction transmitting coils; a second technical scheme includes that the round electromagnetic induction receiving coil is arranged in a tire of a driven wheel of the electric vehicle, and the driven wheel rolls on the electromagnetic induction transmitting coils; a third technical scheme includes that a rectangular electromagnetic induction receiving coil arranged between a rear wheel and a vehicle tail moves horizontally on the electromagnetic induction transmitting coils. The electric vehicle runs along the driving guide lines and can be charged during running.

The invention discloses a vehicle control system having a restriction on drunk driving, which includes alcohol sensors, a single-chip microcomputer, a voltage comparator, a relay, a power source module, and a voice alarm module; the signal sending end of the alcohol sensor is electrically connected with the signal receiving end of the single-chip microcomputer through wires, and the control outputend of the single-chip microcomputer is electrically connected with the electric control end of the voltage comparator, the relay, the power supply module and the voice alarm module through wires respectively. By selecting a gas sensor and a single chip microcomputer, the single-chip microcomputer compares the alcohol concentration of the driver 's exhaled gas with the working value of the control relay, And under the function of relay, the detection of system can effectively control the appearance of drunk driving behavior, guarantee the safe travel, and achieve the goal of truly limiting the driving of drinkers, preventing the accident caused by unconsciousness after drinking, and protecting the safety of people's life and property.

The invention relates to an accelerator device capable of preventing mistaken stepping. The accelerator device comprises a pedal base, an accelerator pedal hinged to one end of the pedal base through a rotation shaft, a support plate arranged at one end of the base, an electronic integration module which is installed on the back face of the accelerator pedal and used for controlling engine speed signal output, a support arm hinged to the accelerator pedal, a rolling wheel installed at the lower end of the support arm and a switch module installed on the side face of the support plate; a line plugin is arranged on the pedal base. By installing the accelerator device, a switching value signal can be provided for a controller of a braking motor to enable the braking motor to act, that is to say, automobile driving is stopped, and therefore automobile accidents are avoided; when a driver loosens the accelerator pedal, the electric accelerator recovers normal work. The accelerator device is compact in structure, automatic in control, safe and reliable.

The invention provides a safety protection device for an automobile accelerator. The safety protection device comprises an accelerator pedal, an accelerator sensor, an accelerator linkage switch, a vacuum booster and a brake master cylinder push rod. The accelerator sensor and the accelerator linkage switch are rotationally buckled. The vacuum booster comprises a valve block shell, a vacuum booster magnetic attracting coil contained in the valve block shell, and a vacuum booster magnetic attracting armature. The brake master cylinder push rod and the valve block shell are connected. When the treading pressure borne by the accelerator pedal reaches the maximum pressure threshold value, the accelerator sensor stops rotating, the accelerator linkage switch still rotates, and therefore the accelerator sensor and the accelerator linkage switch are disengaged; in addition, the accelerator linkage switch is connected with a circuit and triggers the vacuum booster magnetic attracting coil to generate magnetic force and attract the vacuum booster magnetic attracting armature to move, and therefore the valve block shell and the brake master cylinder push rod are driven to move together to make an automobile brake.

The invention provides a universal-joint crossing shaft. The universal-joint crossing shaft comprises a cross-shaped universal-joint base body. The four tail ends of the universal-joint base body areprovided with ends. The universal-joint base body is internally provided with a longitudinal oil channel and a transverse oil channel. The longitudinal oil channel penetrates the center portion of theuniversal-joint base body and a pair of ends, in the longitudinal direction, of the universal-joint base body. The transverse oil channel penetrates the center portion of the universal-joint base body and a pair of ends, in the transverse direction, of the universal-joint base body. The ends are further provided with radial oil holes communicating with the longitudinal oil channel or the transverse oil channel. By means of the universal-joint crossing shaft, the flowing path, resistance and the oil consumption are reduced, the lubrication effect is improved, the clamping phenomenon, caused bydry friction, of a transmission shaft in the running process is reduced, automobile accidents are avoided, and the service life of a universal-joint crossing shaft assembly is prolonged.

The invention provides a vehicle safety control method and device and a vehicle. The method comprises the steps of monitoring whether a driver meets safe driving requirements in the driving process; when the driver does not meet the safe driving requirement, detecting the physical state of the driver; if the physical state of the driver indicates that the vehicle is abnormal, controlling the vehicle to execute preset braking and steering strategies; calling the current vehicle positioning information from the vehicle positioning module, and sending an emergency rescue request carrying the vehicle positioning information. According to the method, whether the driver meets the safe driving requirement in the driving process can be monitored, and when it is determined that the driver does not meet the safe driving requirement, the physical state of the driver is detected, and whether the sudden abnormal condition occurs is tried to be determined. If the physical state indicates that the vehicle is abnormal, the vehicle is actively controlled to execute preset braking and steering strategies so as to avoid car accidents, and emergency rescue is called at the same time.

The invention relates to an anti-acceleration accelerator device and a vehicle. The device for preventing accidental stepping on the accelerator includes a cylinder block and a push-pull rod guided and installed in the cylinder block. The cylinder block is connected with the accelerator pedal in a transmission, and the push-pull rod is connected with the vehicle body. , the sealing assembly includes a plug connected with the push-pull rod and a sealing plug that is slidingly and sealingly matched with the inner wall of the cylinder, a sealing chamber is formed between the sealing plug and the cylinder, and the plug and the sealing plug are limited by the limit structure and can be A compression spring is arranged between the sealing plug and the plug, a sealing plug medium channel is arranged on the sealing plug, and a plug is arranged on the plug, the relative movement speed of the cylinder body and the push-pull rod is fast, When the pressure in the sealing chamber is rapidly increased and the sealing plug moves close to the plug, the plug will block the medium passage of the sealing plug and prevent the cylinder and the push-pull rod from continuing to move relative to each other.

The invention provides an anti-rolling device for electric locomotive in a shield tunnel. The device is arranged at the position, facing the end part of a rear wheel, of a motor base, above a track.the anti-rolling device comprises two brake assemblies and two telescopic assemblies, each telescopic assembly is fixed with the motor base of the tail part of the electric locomotive, each telescopic assembly includes a cylinder and a telescopic rod, The brake assembly is positioned directly above the two rail strips, and the telescopic rods of the two telescopic assemblies are respectively threaded in the two brake assemblies, and the telescopic rods are controlled to contract by the cab, and the brake assembly falls off the telescopic rods and onto the rail strips to brake the electric locomotive. As that anti-rolling device of the shield tunnel electric locomotive is simple in structure, economical and practical, convenient in installation and disassembly, the electric locomotive is safer to travel, the brake is quick and effective, and the electric locomotive roll injury accident is effectively avoided. The electric locomotive anti-rolling device of the shield tunnel electric locomotive is simple in structure, economical and practical, convenient in installation and disassembly.

The invention provides a road condition prompt method and device, and the method comprises the steps: detecting and obtaining the movement parameters of each road condition element in a current road condition; calculating an early-warning road condition according to the movement parameters of each road condition element after a preset time duration; displaying the early-warning road condition through employing an augmented reality image. According to the above scheme, the early-warning road condition is calculated according to the movement parameters of each road condition element after the preset time duration, and the augmented reality image is used for displaying the early-warning road condition, thereby effectively providing more accurate surrounding driving information for a driver before driving operation, solving a problem that a new driver cannot judge the driving operation accurately during high-speed driving, and avoiding the traffic accidents caused by wrong operation.

The invention relates to the technical field of automobile accelerator control, in particular to an automobile accelerator control method and device, and a vehicle. The vehicle includes a steering wheel and an accelerator control device. The accelerator control device includes a controller, a hand-operated accelerator unit and a foot-operated accelerator unit. The controller is connected to the throttle, the hand-operated accelerator unit and the foot-operated accelerator unit. , the controller controls the throttle opening according to the manual throttle signal; when the steering wheel steering angle is greater than the set angle, the controller controls the throttle opening according to the foot pedal signal; when the vehicle direction changes little, the vehicle is manually controlled Accelerate, reduce the operation error caused by the driver's foot control, avoid the phenomenon of sudden acceleration of the vehicle caused by operation error, and cause the car accident. The driver's misuse of the foot control accelerator as the brake caused by the main control is likely to cause accidents.

The invention relates to a vehicle and its anti-acceleration device by mistake. The anti-accelerator device includes a cylinder body and a push-pull rod installed in the cylinder body. The push-pull rod is connected to the accelerator pedal, and the cylinder body is connected to the vehicle body. , the sealing assembly includes a plug connected to the push-pull rod and a sealing plug that slides and seals with the inner wall of the cylinder. A sealing chamber is formed between the sealing plug and the cylinder. Relatively move within the axial range of the plug, there is a compression spring between the sealing plug and the plug, the sealing plug is provided with a sealing plug medium channel, and the plug is provided with a plug, and the relative movement speed between the cylinder body and the push-pull rod is relatively fast. When the pressure in the sealing chamber increases suddenly and the sealing plug moves close to the plug, the plug blocks the medium channel of the sealing plug so as to prevent the cylinder and the push-pull rod from continuing to move relative to each other.

The invention relates to an anti-smashing barrier gate rod and a barrier gate using same. The invention discloses the intelligent anti-smashing barrier gate rod and the barrier gate using the same. The intelligent anti-smashing barrier gate rod comprises a limiting part, a connecting rod, a sensor, a main beam and an auxiliary beam, wherein the main beam and the auxiliary beam are parallel with each other; the limiting part is installed on the main beam and / or the auxiliary beam and provides pre-tightening force for the connecting rod to limit the connecting rod from rotating in the length direction of the main beam or the auxiliary beam to press the sensor; the connecting rod is obliquely arranged between the main beam and the auxiliary beam, two ends of the connecting rod are rotatably connected with the main beam and the auxiliary beam respectively, and one end of the connecting rod is provided with a handle; the sensor is mounted on the main beam or the secondary beam close to the handle; the main beam is connected with a power output shaft of the barrier gate; when the auxiliary beam touches an obstacle and forces the connecting rod to rotate in the length direction of the main beam and the auxiliary beam, the handle presses the sensor switch to enable the sensor to send a signal to the controller, and when the controller receives the signal sent by the sensor, the controller controls the barrier to lift the rod. The anti-smashing barrier gate rod has the following advantages: 1, the application range is wide; and 2, the accident that the brake bar hits a car and a person is avoided.

The invention relates to a device for preventing stepping on an accelerator by mistake and a vehicle. The device comprises a cylinder body and a push-pull rod installed in the cylinder body in a guiding mode. The cylinder body is connected with an accelerator pedal in a transmission mode, and the push-pull rod is connected with a vehicle body. The push-pull rod is slidably in seal fit with the cylinder body through a sealing assembly installed on the end portion of the push-pull rod, and the sealing assembly comprises a plug connected with the push-pull rod and a sealing plug slidably in sealfit with the inner wall surface of the cylinder body. A sealing cavity is formed between the sealing plug and the cylinder body, and the plug and the sealing plug are capable of relatively moving within a specific axial range through limitation of a limiting structure. A compression spring is arranged between the sealing plug and the plug, and a sealing plug medium passage is formed in the sealingplug. A plug head is arranged on the plug, and when the relative movement speed of the cylinder body and the push-pull rod is higher, and pressure in the sealing cavity is suddenly increased to causethe sealing plug to move close to the plug, the plug blocks the sealing plug medium passage to prevent the cylinder body and the push-pull rod from continuing the relative movement.

The invention discloses a radio-based underground mining communication positioning device and a method for using it. The positioning device includes a fixed anchor node, a mobile anchor node and an end node. The fixed anchor nodes are connected by optical fiber for communication. The fixed anchor node The communication connection between the node and the mobile anchor node and the fixed anchor node and the end node is carried out through ZigBee wireless communication technology, and the mobile anchor node and the end node are positioned by the RSSI ranging positioning method, and the distance between the mobile anchor node and the end node Communicate and connect through CSS wireless communication technology. The present invention sets two sets of positioning modules at the mobile anchor node and the terminal node, which can make up for the deficiency of the existing downhole communication positioning system, expand the area of ​​the positioning area, reduce the positioning blind area, and not only realize the precise positioning of the underground transportation equipment, but also can The operation safety of the underground transportation equipment is guaranteed, and the complexity and cost of the equipment are reduced.

The invention discloses a vehicle alarm system, comprising: a DSP control chip, a detection unit, and an alarm unit; wherein, the detection unit judges whether there is a moving target within a preset range behind the vehicle according to a detection instruction of the DSP control chip, and judges whether there is a moving target When the moving target is detected, the moving target is detected, and the detected first detection signal is provided to the DSP control chip; the DSP control chip judges whether the door opening warning needs to be carried out according to the first detection signal provided by the detection unit, and when it is judged as When the door opening warning is required, the door opening alarm signal is provided to the alarm unit; the alarm unit provides an alarm prompt to the user in the vehicle according to the door opening alarm signal provided by the DSP control chip. Through the vehicle alarm system, traffic accidents caused by the opening of the car door are avoided, and the safety of the vehicle is improved; in addition, passengers are not required to watch the rear state of the vehicle before getting off the vehicle, providing passengers with better driving comfort .