CN111776091A - Trailer vehicle running condition monitoring system - Google Patents
Trailer vehicle running condition monitoring system Download PDFInfo
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- CN111776091A CN111776091A CN202010768667.1A CN202010768667A CN111776091A CN 111776091 A CN111776091 A CN 111776091A CN 202010768667 A CN202010768667 A CN 202010768667A CN 111776091 A CN111776091 A CN 111776091A
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- 238000001514 detection method Methods 0.000 claims description 58
- 238000004891 communication Methods 0.000 claims description 46
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D53/00—Tractor-trailer combinations; Road trains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/248—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for measuring, indicating or displaying the weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
- B60Q11/007—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not the lighting devices indicating change of drive direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention relates to the technical field of safe driving of a trailer vehicle, and particularly discloses a system for monitoring the driving condition of the trailer vehicle, wherein the trailer vehicle comprises a tractor and a trailer, the tractor pulls the trailer through a trailer device, and the system for monitoring the driving condition of the trailer vehicle comprises: the trailer control device is arranged in the trailer; the trailer control device can monitor the driving condition of the trailer and the traction condition between the trailer and the tractor; the tractor control device can process the driving condition of the trailer and the traction condition between the trailer and the tractor, and sends out a reminding signal when the processed data display is abnormal. The system for monitoring the driving condition of the trailer vehicle can enable a driver of the tractor to obtain fault information under the condition that no hard-wired connection exists between the tractor and the trailer.
Description
Technical Field
The invention relates to the technical field of safe driving of a trailer vehicle, in particular to a monitoring system for the driving condition of the trailer vehicle.
Background
The rapid development of national economy has led to more and more vehicle trailers to meet the needs of transportation, transport and people's leisure and recreation, and trailers, semi-trailers, box trailers, boat trailers, etc. are available anywhere on highways. Typically, trailers include lighting systems, such as tail lights, brake lights, turn signal lights, and the like, and some trailers also include electrical braking systems. Various malfunctions of the trailer lighting and braking system may occur from time to time during travel, for example, lights on the trailer may fail, or the electronic brakes may be disconnected or otherwise malfunction. Because the driver of the tractor can not see the trailer lamps, the driver can continue driving under the condition of not knowing that the trailer lamps are in failure; also, without the knowledge of the driver, the trailer brakes may malfunction, resulting in a brake failure. Factors influencing the stable running of the trailer vehicle are many, and firstly, the brake system breaks down. When the running condition changes suddenly, if the braking deceleration fails, the yaw or swing motion of the trailer can become uncontrollable, so that the towing and towed vehicles are cut off, when the towing vehicle moves, the rear part can swing at an acute angle with the front part in an uncontrolled way, the towing vehicle moves in a yaw or lateral direction, even the trailer falls over, serious traffic accidents such as casualties, vehicle damage and the like are caused, and the normal running of traffic and transportation is seriously influenced.
At present, in some trailer vehicles, most of the trailer vehicles are provided with fault detection units, so that faults generated by the trailer vehicles cannot be detected in real time, and if the same fault detection units as those of the tractor vehicles are also arranged on the trailer vehicles, the system becomes complicated, the installation and the maintenance are inconvenient, and the vehicle cost is increased. Still others use plug-in electronics (e.g., cameras, etc.) for monitoring, which are mounted on a trailer or tractor. These devices or systems can often lack robustness due to exposure of the plug-in to air, road debris and other harsh environments, thereby requiring frequent maintenance and replacement. Furthermore, these devices and systems are often very expensive or technically complex in terms of construction and installation, subject to factors such as implementation technology. Therefore, how to provide a detection and control system which can be connected or embedded into the original vehicle trailer to effectively detect the driving condition of the trailer in real time, find the fault in time, control the driving stability of the trailer vehicle, prevent the accident and improve the driving safety has important significance.
Disclosure of Invention
The invention provides a system for monitoring the running condition of a trailer vehicle, which solves the problem of fault detection of the trailer vehicle in the related technology.
As one aspect of the present invention, there is provided a running condition monitoring system for a trailer vehicle including a towing vehicle and a trailer, the towing vehicle towing the trailer by a towing device, wherein the running condition monitoring system for the trailer vehicle includes: the tractor control device and the trailer control device are connected through wireless communication, the tractor control device is arranged in the tractor, and the trailer control device is arranged in the trailer;
the trailer control device can monitor the driving condition of a trailer and the traction condition between the trailer and the tractor and transmit the driving condition of the trailer and the traction condition between the trailer and the tractor to the trailer control device in a wireless communication mode;
the tractor control device can receive and process the driving condition of the trailer and the traction condition between the trailer and the tractor, and sends out a reminding signal when the processed data display is abnormal.
Further, the trailer control apparatus includes: the system comprises a fault detection control module and a trailer controller, wherein the fault detection control module is in communication connection with the trailer controller, the trailer controller is in wireless communication connection with the tractor control device, the fault detection control module is used for detecting the driving condition of a trailer and the traction condition between the trailer and the tractor in real time, and the trailer controller is used for processing the driving condition of the trailer and the traction condition between the trailer and the tractor and then sending the processed driving condition to the tractor control device.
Further, the fault detection control module includes: the trailer vehicle lamp detection circuit, the traction weight detection circuit, the trailer wheel speed and tire pressure detection circuit are all in communication connection with the trailer controller;
the trailer lamp detection circuit is used for monitoring the state of the trailer lamp and sending the state of the trailer lamp to the trailer controller;
the traction weight detection circuit is used for detecting the weight of a traction frame of a trailer and sending the weight of the traction frame of the trailer to the trailer controller;
the wheel speed and tire pressure detection circuit of the trailer is used for detecting the wheel speed and tire pressure of the trailer and sending the wheel speed and tire pressure of the trailer to the trailer controller.
Further, the fault detection control module further comprises: the trailer brake system detection circuit is in communication connection with the trailer controller and is used for monitoring the working state of an electric brake of the trailer and transmitting the working state of the electric brake to the trailer controller.
Further, the trailer control device further includes: the trailer wireless transceiver is in communication connection with the trailer controller, and the trailer wireless transceiver is used for realizing the communication connection between the trailer controller and the tractor control device.
Further, the trailer controller comprises a single chip microcomputer.
Further, the tractor control device includes: tractor control module and terminal warning module, tractor control module with terminal warning module communication connection, tractor control module with terminal warning module all with trailer controlling means communication connection, tractor control module is used for receiving the trailer situation of traveling that trailer controlling means sent and the trailer with the condition of pulling between the tractor, and the trailer situation of traveling and the trailer with the condition of pulling between the tractor shows and generates warning signal when unusual, terminal warning module is used for the basis warning signal sends warning information.
Further, the traction control device further comprises a tractor wireless transceiver, the tractor wireless transceiver is respectively in communication connection with the tractor control module and the terminal warning module, and the tractor transceiver can respectively realize communication connection between the tractor control module and the trailer control device and communication connection between the terminal warning module and the trailer control device.
Further, the terminal warning module comprises an audible alarm.
Further, the trailer device comprises a coupling mechanism, the coupling mechanism is in communication connection with the trailer control device, and the trailer control device can monitor the working state of the coupling mechanism.
According to the system for monitoring the driving condition of the trailer vehicle, the state information between the tractor and the trailer is transmitted and monitored in a wireless mode, and a hard wire connection is not needed. The system for monitoring the running condition of the trailer vehicle provided by the embodiment of the invention can enable a driver of the tractor to obtain fault information under the condition that no hard wire connection exists between the tractor and the trailer so as to take corresponding measures in time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a trailer vehicle according to the present invention.
Fig. 2 is a block diagram of a system for monitoring a driving condition of a trailer vehicle according to the present invention.
Figure 3 is a schematic diagram of a tractor trailer repeater harness (connector harness) provided by the present invention.
Fig. 4 is a schematic diagram of a trailer brake system detection circuit provided by the present invention.
Fig. 5 is a three-operational amplifier high common mode rejection ratio amplifier circuit provided by the invention.
FIG. 6 is a schematic diagram of a wheel speed signal processing circuit for a trailer according to the present invention.
Fig. 7 is a schematic diagram of a control signal of the trailer controller according to the present invention.
Fig. 8 is a schematic diagram of tractor control signals provided by the present invention.
Fig. 9 is a signal diagram of a terminal alarm module according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present embodiment, a system for monitoring a driving condition of a trailer vehicle is provided, fig. 1 is a schematic structural diagram of a trailer vehicle according to an embodiment of the present invention, and fig. 2 is a block diagram of a system for monitoring a driving condition of a trailer vehicle according to an embodiment of the present invention, as shown in fig. 1 and fig. 2, the trailer vehicle includes a towing vehicle 1 and a trailer 2, the towing vehicle 1 tows the trailer 2 through a towing device 3, wherein the system for monitoring a driving condition of a trailer vehicle includes: a tractor control device 100 and a trailer control device 200, wherein the tractor control device 100 and the trailer control device 200 are connected through wireless communication, the tractor control device 100 is arranged in the tractor 1, and the trailer control device 200 is arranged in the trailer 2;
the trailer control device 200 can monitor the driving condition of the trailer and the traction condition between the trailer and the tractor, and transmit the driving condition of the trailer and the traction condition between the trailer and the tractor to the trailer control device in a wireless communication mode;
the tractor control apparatus 100 can receive and process the trailer driving condition and the traction condition between the trailer and the tractor, and send a warning signal when the processed data shows abnormality.
According to the system for monitoring the driving condition of the trailer vehicle, the state information between the tractor and the trailer is transmitted and monitored in a wireless mode, and hard wire connection is not needed. The system for monitoring the running condition of the trailer vehicle provided by the embodiment of the invention can enable a driver of the tractor to obtain fault information under the condition that no hard wire connection exists between the tractor and the trailer so as to take corresponding measures in time.
Specifically, as shown in fig. 2, the trailer control apparatus 200 includes: the system comprises a fault detection control module 210 and a trailer controller 220, wherein the fault detection control module 210 is in communication connection with the trailer controller 220, the trailer controller 220 is in wireless communication connection with the tractor control device 100, the fault detection control module 210 is used for detecting the driving condition of a trailer and the traction condition between the trailer and the tractor in real time, and the trailer controller 220 is used for processing the driving condition of the trailer and the traction condition between the trailer and the tractor and then sending the processed driving condition to the tractor control device.
As shown in fig. 1, a tractor 1 in a trailer vehicle pulls a trailer 2 by means of a suitable hitch 3. The trailer control apparatus 200 is comprised of a fault detection control module 210, a trailer controller 220, and various electrical systems within the trailer (e.g., an electrical braking system and various lighting systems). The trailer controller 220 is connected to the fault detection control module 210. The trailer wireless transceiver 230 is coupled to the failure detection control module 210 and may be otherwise integrated or embedded within the failure detection control module 210. Tractor transceiver is connected with tractor control module to with trailer wireless transceiver wireless communication, tractor transceiver and terminal warning module wireless communication, trailer wireless transceiver also with terminal warning module wireless communication. The terminal warning module can display the state information of the trailer in real time. An electrical harness port 31, to which the tractor and trailer are connected, relays the operator's operating commands. The trailer load measurement sensor 32 and the trailer wheel speed sensor are mounted in appropriate locations on the traction frame and the hub, respectively. The trailer fault detection and control module is applied to detecting faults of a trailer lighting system (such as faults of tail lamps, brake lamps or steering lamps); detecting a trailer brake system fault; detecting a condition of a hitch between a tractor and a trailer; the trailer weight (i.e., the actual weight of the trailer bearing on the hitch ball, which is added to the total weight of the tractor) is sensed, as well as trailer speed and yaw angle, among other things. The control circuit is applied to the wireless control trailer illumination, the wireless control trailer braking system and the driving stability of the wireless control trailer.
Specifically, the fault detection control module 210 includes: the trailer vehicle lamp detection circuit, the traction weight detection circuit, the trailer wheel speed and tire pressure detection circuit are all in communication connection with the trailer controller;
the trailer lamp detection circuit is used for monitoring the state of the trailer lamp and sending the state of the trailer lamp to the trailer controller;
the traction weight detection circuit is used for detecting the weight of a traction frame of a trailer and sending the weight of the traction frame of the trailer to the trailer controller;
the wheel speed and tire pressure detection circuit of the trailer is used for detecting the wheel speed and tire pressure of the trailer and sending the wheel speed and tire pressure of the trailer to the trailer controller.
More specifically, the fault detection control module 210 further includes: the trailer brake system detection circuit is in communication connection with the trailer controller and is used for monitoring the working state of an electric brake of the trailer and transmitting the working state of the electric brake to the trailer controller.
Specifically, the trailer control apparatus 200 further includes: a trailer wireless transceiver 230, said trailer wireless transceiver 230 being in communication with said trailer controller, said trailer wireless transceiver being configured to enable communication between said trailer controller and said tractor control device.
In some embodiments, the trailer controller includes a single chip microcomputer.
Fig. 7 is a schematic diagram of control signals of the trailer controller.
Specifically, the tractor control apparatus 100 includes: tractor control module 110 and terminal warning module 120, tractor control module 110 with terminal warning module 120 communication connection, tractor control module 110 with terminal warning module 120 all with trailer controlling means 200 communication connection, tractor control module 110 is used for receiving the trailer situation of traveling that trailer controlling means 200 sent and the trailer with the condition of pulling between the tractor, and the trailer situation of traveling and the trailer with generate warning signal when the condition of pulling between the tractor shows unusually, terminal warning module is used for the basis warning signal sends warning information.
Specifically, the traction control device 100 further includes a tractor wireless transceiver 130, the tractor wireless transceiver 130 is respectively in communication connection with the tractor control module 110 and the terminal alarm module 120, and the tractor transceiver can respectively realize the communication connection between the tractor control module and the trailer control device and the communication connection between the terminal alarm module and the trailer control device.
Fig. 8 is a schematic diagram of tractor control signals.
In some embodiments, the terminal alert module 120 includes an audible alarm.
As shown in fig. 9, the terminal is a signal diagram of the module only.
In particular, the towing means 3 comprises a coupling mechanism, which is in communication with the trailer control means, which is able to monitor the operating state of the coupling mechanism.
The following describes in detail a specific operation process of the system for monitoring a driving condition of a trailer vehicle according to an embodiment of the present invention.
As a specific embodiment, the status of trailer lights (e.g., tail lights, brake lights, turn signal lights, etc.) is monitored. As shown in fig. 3, status information of the existing electrical control harness interface (e.g., 4 pin, 7 pin, 13 pin) of the tractor-trailer is input to a Universal Asynchronous Receiver Transmitter (UART) connected to the trailer wireless transceiver via a fault detection circuit. The trailer wireless transceiver and the tractor wireless transceiver are in wireless communication, so that detected information is wirelessly transmitted into the terminal warning module. If there is a problem with the trailer lighting lines, the converter or the trailer lighting itself, the terminal warning module will alert the driver.
It should be noted that the 4-pin wire harness interface is a motorcycle trailer interface, the male end of the wire harness is only provided with four wires of a left steering lamp, a right steering lamp, a tail lamp and a ground wire, and the female end of the wire harness is provided with five wires of a brake, a left steering lamp, a right steering lamp, a tail lamp and a ground wire. The 7 pin type wire harnesses are respectively a brake lamp, a running lamp, a left-right steering, a long live wire, a bond wire and a standby wire. The interface of the 13-pin wire harness comprises a brake lamp, a left steering lamp, a right steering lamp, a running lamp, a reversing lamp, a fog lamp, a long live wire, a ground wire and the like. This interface is an important transfer of the lead vehicle information to the trailer. If the driver steps on the brake and turns to the lamp in the front car, then the trailer of rear also can follow the brake and turn to the lamp, and this interface (plug) has included light synchronization, electric brake synchronization, indicator, brake lamp etc. and all functions contain wherein.
To detect the condition of the trailer light system, the trailer light detection circuit is designed to determine whether the wiring harness system is operating properly, and the trailer light detection circuit uses a high side current sensor with a suitable resistor, such as a 0.01 ohm resistor, as a shunt to determine whether the proper current is flowing. If current passes through the wire harness, the wire harness of the part is judged to be in a good state.
To determine if the trailer bulb is broken, a pull-up resistor is used on the signal line. If the bulb is broken or otherwise fails, the line will not be able to pull down the voltage on the pull-up resistor. The pull-up is to clamp the indeterminate signal at a high level through a resistor which also serves as a current limiting function.
The wireless transceiver of the trailer can be selected from PT2262-PT2272 infrared remote control transmitting/receiving chips. The chip adopts a CMOS process, and has the characteristics of low power consumption, low price, simple structure of a universal coding/decoding circuit and high cost performance. The PT2262/2272 infrared remote control transmitting/receiving chip is a pair of chips with address and data coding functions, wherein the transmitting chip PT2262-IR integrates a carrier wave oscillator, an encoder and a transmitting unit, and the design of a transmitting circuit can be simplified. The trailer wireless transceiver may also employ other transceivers for wirelessly remotely controlling the door lock of the vehicle.
As another specific embodiment, the detection of the operational status of the trailer brake system is described as an example. In order to detect and control the trailer brake system, if the trailer contains an electric brake, the fault detection control module adopts the trailer brake system detection circuit to be connected with the trailer electric brake controller in series, and provides acousto-optic warning when the trailer electric brake is disconnected. As shown in fig. 4, the trailer brake detection and control circuit cooperates with Pulse Width Modulation (PWM) output from the trailer brake controller, and the sensor 20 is connected in series with the PWM output. In the event of a trailer brake interruption, the green LED is turned off, the red LED is turned on, and an audible and visual warning is issued for a predetermined period of time (e.g., the red LED may flash for 3-5 seconds in synchronization with an audible alarm and then be illuminated to a maximum intensity until the brake interruption returns to normal).
As shown in fig. 4, the detection and control circuit has 4 important input and output terminals: a positive battery 10, a negative battery 14, a "stop" signal 11 from the brake controller, and an output 60 from the trailer brake detection and control circuit.
In the absence of a "stop" there is no current through sensor 20 and no voltage is applied to the non-inverting input of comparator 22, so the output of comparator 22 is low (Lo), red LED 24 is inactive and non-inverting input 32 of comparator 26 is low. The trailer brakes 60 have no output voltage and the braking control is monitored by either the inverting input 30 or the comparator 26. The output or comparator 26 output is high causing the illuminated green LED 28 to light up and charge the integrator capacitor 34, through PNP transistor 38 and NPN transistor 36, with the input 41 of the primary flip-flop 40 high preventing the primary flip-flop from flipping, thereby maintaining the low output, triggering the audible alarm 50 and oscillator 42 off. In summary, in the no input state, the green LED is lit, and the red LED and audio alarm are disabled.
When PWM 12 "stop" 11 occurs, a positive voltage is generated across sensor 20, comparator 22 outputs a high level (HI), and red LED 24 is illuminated according to the pulse width of the PWM signal. The high impedance dc level of the trailer brake output 60 is at the inverting input of the comparator 26 and the comparator 26 output is switched low (Lo), turning off the green LED 28, disabling the NPN transistor 36 and transistor 38 from conducting, thereby inhibiting the single trigger 40 from flashing for 3-5 seconds, while the audio alarm 50 is activated and the oscillator 42 is enabled, causing the red LED 24 to also flash for 3-5 seconds. When the single trigger 40 times out, the oscillator 42 output remains high, maximizing the red LED emission until the PWM "stop" is removed.
The trailer brake system detection circuit adopts the wireless communication connection mode to control the trouble information of the trailer brake and convey to the driver of the tractor in a visual mode.
As another specific embodiment, to detect whether the trailer is overweight, the driver is alerted by detecting the weight of the tractor frame (tongue weight) of the trailer and, if the tongue weight is found to exceed a predetermined threshold, taking action to correct it.
A pressure sensor 32 is mounted on the trailer 3, and the weight of the trailer is sensed by the pressure sensor. The output signal of the pressure sensor is amplified, filtered and converted (payload signal) by the trailer fault detection and control module, and then transmitted to the terminal alarm module 120 via the trailer wireless transceiver 230.
The weight sensor needs to be selected according to the maximum cargo capacity of the trailer, the number of used sensors, the self weight of the trailer, unbalance loading, vibration impact and other additional loads. For example, a double shear beam (bridge) load cell QS1 is selected. According to the performance index of the sensor, the weighing signal output by the sensor needs to be amplified and filtered. The amplifying and filtering circuit can adopt a three-operational amplifier high common mode rejection ratio amplifying circuit and a first-order low-pass filtering circuit which are widely applied. As shown in FIG. 5, ui1 and ui2 are differential inputs of the amplifying circuit and come from the output of the pressure sensor, and C1 and C2 are high-frequency capacitors connected in parallel with the front end of the amplifying circuit, so as to filter high-frequency noise possibly mixed in the signal. The integrated operational amplifiers A2 and A3 are balanced symmetrical differential amplification input stages; the operational amplifier a1 is a double-ended input single-ended output stage. In the differential amplification input stage, the performance parameters of A2 and A3 are selected consistently, the performance of the external resistance value is symmetrical, only the differential signal of the input stage is amplified, and the common-mode signal, the offset, the drift and the like of the two operational amplifiers are not amplified. The output stage is a subtraction circuit, which mainly functions to convert the double-ended signal into a single-ended signal and further suppress the common-mode signals of A2 and A3. The resistances of the resistors R3, R4, R5 and R6 in the circuit are consistent, and the influences of bias current and the like are mainly eliminated.
As another specific embodiment, in order to detect the wheel speed and the tire pressure of the trailer, it is necessary to select an appropriate wheel speed measurement sensor (for example, to select the hall revolution speed sensor HAL-506) and mount the revolution speed sensor on the hub of the trailer. Normally, the output signal of the wheel speed sensor needs to be filtered, as shown in fig. 6, the operational amplifier A, R2, R3, R4, C1 and C2 constitute a second-order low-pass filter circuit mainly used for filtering high-frequency glitch signals output by the sensor, the operational amplifier B, R5, R6 and R7 constitute a hysteresis comparator, and hysteresis voltage is adjusted by a resistor R6 and mainly used for eliminating ringing and improving the anti-interference capability of the circuit. From an economic point of view, the tire pressure is obtained from the measured value of the wheel speed by appropriate calculation. The tire pressure sensor can be directly used for measuring to obtain the tire pressure.
The terminal warning module comprises a radio frequency transceiver and is communicated with the tractor wireless transceiver. The terminal warning module comprises one or more state information indicating units, such as an LED indicating lamp, a buzzer and the like, so as to warn a driver.
It should be noted that the trailer vehicle driving condition monitoring system can further perform other detection and control and monitoring functions by adding appropriate components without departing from the scope of the invention. For example: the lighting system and the braking system can be controlled in a wireless mode; by providing appropriate sensors and control modules, the lateral movement or yaw angle of the trailer is monitored and controlled in order to provide more stable trailer operation; the coupling mechanism is completed by suitable electronic components between the tractor and the trailer, and the state of the coupling can also be monitored by a wireless system; the terminal monitoring module may also take a variety of forms depending on the particular function of the vehicle-towed wireless monitoring system.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A system for monitoring a driving condition of a trailer vehicle, the trailer vehicle including a towing vehicle and a trailer, the towing vehicle towing the trailer by a towing means, the system comprising: the tractor control device and the trailer control device are connected through wireless communication, the tractor control device is arranged in the tractor, and the trailer control device is arranged in the trailer;
the trailer control device can monitor the driving condition of a trailer and the traction condition between the trailer and the tractor and transmit the driving condition of the trailer and the traction condition between the trailer and the tractor to the trailer control device in a wireless communication mode;
the tractor control device can receive and process the driving condition of the trailer and the traction condition between the trailer and the tractor, and sends out a reminding signal when the processed data display is abnormal.
2. The system for monitoring the driving condition of a trailer vehicle according to claim 1, wherein said trailer control means comprises: the system comprises a fault detection control module and a trailer controller, wherein the fault detection control module is in communication connection with the trailer controller, the trailer controller is in wireless communication connection with the tractor control device, the fault detection control module is used for detecting the driving condition of a trailer and the traction condition between the trailer and the tractor in real time, and the trailer controller is used for processing the driving condition of the trailer and the traction condition between the trailer and the tractor and then sending the processed driving condition to the tractor control device.
3. The system for monitoring the running condition of a trailer vehicle according to claim 2, wherein said failure detection control module comprises: the trailer vehicle lamp detection circuit, the traction weight detection circuit, the trailer wheel speed and tire pressure detection circuit are all in communication connection with the trailer controller;
the trailer lamp detection circuit is used for monitoring the state of the trailer lamp and sending the state of the trailer lamp to the trailer controller;
the traction weight detection circuit is used for detecting the weight of a traction frame of a trailer and sending the weight of the traction frame of the trailer to the trailer controller;
the wheel speed and tire pressure detection circuit of the trailer is used for detecting the wheel speed and tire pressure of the trailer and sending the wheel speed and tire pressure of the trailer to the trailer controller.
4. The system for monitoring the driving condition of a trailer vehicle as claimed in claim 3, wherein said fault detection control module further comprises: the trailer brake system detection circuit is in communication connection with the trailer controller and is used for monitoring the working state of an electric brake of the trailer and transmitting the working state of the electric brake to the trailer controller.
5. The system for monitoring the driving condition of a trailer vehicle according to claim 2, wherein said trailer control means further comprises: the trailer wireless transceiver is in communication connection with the trailer controller, and the trailer wireless transceiver is used for realizing the communication connection between the trailer controller and the tractor control device.
6. The system as claimed in claim 2, wherein said trailer controller includes a single chip microcomputer.
7. The system for monitoring the running condition of a trailer according to any one of claims 1 to 6, wherein the trailer control means comprises: tractor control module and terminal warning module, tractor control module with terminal warning module communication connection, tractor control module with terminal warning module all with trailer controlling means communication connection, tractor control module is used for receiving the trailer situation of traveling that trailer controlling means sent and the trailer with the condition of pulling between the tractor, and the trailer situation of traveling and the trailer with the condition of pulling between the tractor shows and generates warning signal when unusual, terminal warning module is used for the basis warning signal sends warning information.
8. The system as claimed in claim 7, wherein the traction control device further comprises a tractor wireless transceiver, the tractor wireless transceiver is in communication with the tractor control module and the terminal alarm module respectively, and the tractor transceiver is capable of achieving communication between the tractor control module and the trailer control device and communication between the terminal alarm module and the trailer control device respectively.
9. The system for monitoring the driving status of a trailer vehicle as defined in claim 7, wherein said terminal alert module comprises an audible alarm.
10. The system as claimed in claim 1, wherein said hitch device includes a coupling mechanism, said coupling mechanism being communicatively coupled to said hitch control device, said hitch control device being capable of monitoring the operational status of said coupling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768667.1A CN111776091A (en) | 2020-08-03 | 2020-08-03 | Trailer vehicle running condition monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768667.1A CN111776091A (en) | 2020-08-03 | 2020-08-03 | Trailer vehicle running condition monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111776091A true CN111776091A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010768667.1A Withdrawn CN111776091A (en) | 2020-08-03 | 2020-08-03 | Trailer vehicle running condition monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN111776091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771561A (en) * | 2021-09-23 | 2021-12-10 | 广州小鹏汽车科技有限公司 | Vehicle towing method, electronic device, towing vehicle and storage medium |
-
2020
- 2020-08-03 CN CN202010768667.1A patent/CN111776091A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771561A (en) * | 2021-09-23 | 2021-12-10 | 广州小鹏汽车科技有限公司 | Vehicle towing method, electronic device, towing vehicle and storage medium |
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