CN216287066U

CN216287066U - Geomagnetic induction motor vehicle counting device for goods yard or parking lot

Info

Publication number: CN216287066U
Application number: CN202122254768.XU
Authority: CN
Inventors: 王金涛; 卢兴国
Original assignee: Communication University of China
Current assignee: Communication University of China
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-04-12
Anticipated expiration: 2031-09-17

Abstract

The utility model relates to the technical field of measurement, in particular to a geomagnetic induction motor vehicle counting device for a goods yard or a parking lot, which comprises a geomagnetic inductor arranged at an entrance of the goods yard or the parking lot; a geomagnetic sensor disposed at an exit of the goods yard or the parking lot; a display screen at the entrance of the parking lot; vehicle counting controller. According to the principle that a moving vehicle can generate induction pulses through the vicinity of a magnetic induction sensor, the magnetic induction sensor arranged at the entrance and exit of a parking lot or a goods yard collects, analyzes and counts signals uniformly through a vehicle main controller, and transmits the counting result to a display screen for displaying.

Description

Geomagnetic induction motor vehicle counting device for goods yard or parking lot

Technical Field

The utility model relates to the field of automatic counting of motor vehicles, in particular to a geomagnetic induction motor vehicle counting device for a goods yard or a parking lot.

Background

With the progress of society and the continuous development of economy, more and more motor vehicles are provided, and great demands are made on the aspects of vehicle counting management and the like in urban community parking management and goods yards. The existing motor vehicle counting technology is of such types, the reflection type infrared photoelectric sensor mode is easily interfered by ambient light, ambient dust and the like, influences the sensitivity, is easily influenced by pedestrians and the like to cause false alarm, if the counting is carried out on a large vehicle, the reflection path of the device is lengthened, the power of the device is inevitably increased, the service life of the device is influenced, the power consumption is increased, meanwhile, the reflection path is lengthened, and because of light path scattering, the detection sensitivity is reduced, and the false alarm rate is increased. In the ground induction coil mode, an induction coil needs to be buried in the excavated ground, and some occasions are not suitable for breaking and dismantling the ground; the measurement accuracy is also susceptible to the surrounding environment. And a multi-sensor mode is adopted, so that the device is too complex and high in cost, and a plurality of application occasions are limited. A geomagnetic induction vehicle counting device is characterized in that ferromagnetic substances contained in a vehicle can affect geomagnetic signals of a vehicle existing area, so that magnetic lines of force of the earth in the vehicle existing area are bent. When the vehicle passes by the sensor, the sensor can sensitively sense the change of the signal, and the related information of the detection target can be obtained through signal analysis.

The geomagnetic induction vehicle counting device is high in detection precision, suitable for various complex weathers, strong in anti-interference performance, stable and reliable in work, convenient to install and maintain and long in service life.

Because the application scenes of vehicle counting are different, the arrangement of the entrance and the exit of a field, the capacity of a parking space and the like are changed frequently, and the program of the device needs to be modified, recompiled and reprogrammed. If the equipment manufacturer changes the equipment on site every time, travel expense and time cost are increased; if the produced code is sent directly to the customer, there are problems with privacy and customer skill level. Therefore, the device is provided with a remote programming (programming) module of a main chip and a matched software tool for solving the problems.

Disclosure of Invention

In summary, in order to solve the problem of remote program update of the existing geomagnetic induction vehicle counting device, the utility model provides a geomagnetic induction motor vehicle counting device which can be used in a goods yard or a parking lot and can perform a remote programming function through an ethernet.

In order to achieve the purpose, the technical scheme of the utility model is as follows: a geomagnetic induction motor vehicle counting device for a goods yard or a parking lot comprises a geomagnetic induction sensor assembly with the height of 25-30cm, and is used for an entrance or an exit of the goods yard or the parking lot; a display screen for the number of vehicles in a goods yard or a parking lot; the vehicle counting controller is the core of the utility model, and comprises an Ethernet interface, an Ethernet-to-ISP function module, a microcontroller MCU, an inlet geomagnetic sensor interface, an outlet geomagnetic sensor interface and a counting output module.

Further, the geomagnetic induction sensor assembly takes the characteristics of magnetic field signals into consideration, the shell is made of engineering plastics or aluminum materials with certain strength, and the geomagnetic induction sensor assembly is provided with a radio transmission module based on LoRaWAN protocol, so that the information of vehicles passing through the entrance or the exit of a goods yard or a parking lot is transmitted to the vehicle counting controller in real time.

Further, the vehicle counting controller is used for comprehensively calculating the number of goods yard vehicles or the number of occupied parking spaces and the number of free parking spaces of the parking lot vehicles by counting single or multiple entrance vehicles and single or multiple exit vehicles, and displaying the number information on a single or multiple display screens.

Furthermore, the Ethernet interface is a general network interface externally connected to the vehicle counting controller, and is programmed for remotely updating programs of the motor vehicle counting device. The Ethernet-to-ISP function module realizes the function of converting Ethernet network signals into 'In-System programming' ISP (In-System programming) signals so as to complete the remote programming of the counting device of the motor vehicle.

Further, the entrance geomagnetic sensor interface is an I/O port for switching the received radio signal of the entrance geomagnetic induction sensor assembly LoRaWAN protocol to the microcontroller MCU. The outlet geomagnetic sensor interface is an I/O port for transferring the received radio signal of the outlet geomagnetic sensor assembly LoRaWAN protocol to the microcontroller MCU.

Furthermore, the counting output module outputs the calculation result of the MCU to a display screen for display. MCU is the core of vehicle counting controller, and the vehicle that receives entry geomagnetic induction sensor subassembly and export geomagnetic induction sensor subassembly passes through the information, realizes the vehicle count in goods yard or parking area to show data on the display screen through count output module.

The technical principle of the utility model is as follows: the strength of the earth's magnetic field is constant over a wide area (on the order of several kilometers). When a ferromagnetic object, such as an automobile, is placed in a magnetic field, which disturbs the magnetic field, a geomagnetic sensor disposed nearby can measure a change in the intensity of the geomagnetic field, and as shown in the following figure, a peak occurs when the sensor is parallel to the vehicle. This curve, when smoothed, can be used to detect the presence of a vehicle when the vehicle is 25-30cm from the sensor. By setting a suitable threshold value, the interference signals of other vehicles can be filtered.

The vehicle counting controller has the advantages that the vehicle counting controller receives vehicle passing information of the entrance geomagnetic induction sensor assembly and the exit geomagnetic induction sensor assembly, comprehensively calculates the number of vehicles in a goods yard or a parking lot, and displays data on a display screen through the counting output module. The vehicle counting controller is externally connected with a general network interface, and the Ethernet network signal is converted into an In-System programming ISP (Internet service provider) signal to finish the remote programming of the utility model.

Drawings

FIG. 1 is a block diagram of the preferred embodiment of the present invention;

FIG. 2 is a functional block diagram of a vehicle counting controller;

FIG. 3 is a block diagram of a remote programming module circuit assembly;

FIG. 4 is a schematic diagram of a circuit connection of a geomagnetic sensor of the vehicle counting apparatus;

FIG. 5 is a schematic diagram of the display panel and its driving circuit.

Detailed Description

Referring to fig. 1, a geomagnetic induction motor vehicle counting device for a goods yard or a parking lot comprises a geomagnetic induction sensor assembly 1 with the height of 25-30cm, which is used for an entrance of the goods yard or the parking lot, wherein a single geomagnetic induction sensor or a plurality of geomagnetic induction sensors can be arranged according to the entrance condition of the goods yard or the parking lot, the geomagnetic induction sensor shell is made of hard engineering plastics or aluminum materials by considering the characteristics of magnetic field signals; the display screen 2 for the number of vehicles in the goods yard or the parking lot takes the influence of strong light in the daytime into consideration, the display screen is a high-brightness and low-cost monochromatic display screen, and a single display screen or a plurality of display screens can be arranged according to the field condition; the geomagnetic induction sensor assembly 3 with the height of 25-30cm is used for an exit of a goods yard or a parking lot, a single geomagnetic induction sensor or a plurality of geomagnetic induction sensors can be arranged according to the condition of the exit on the spot, the characteristics of a magnetic field signal are considered, and the housing of the geomagnetic induction sensor is made of hard engineering plastics or aluminum materials; the vehicle counting controller 4, which is the core of the present invention, includes an Ethernet interface 401, which is a general network interface externally connected to the vehicle counting controller, and is programmed for remotely updating programs of the motor vehicle counting device. The Ethernet to ISP function module 402 realizes the function of converting Ethernet network signals into "In-System programmable" ISP (In-System programming) signals, so as to complete the remote programming of the counting device for motor vehicles. The microcontroller MCU 404, which is the core of the vehicle counting controller, receives the vehicle passing information of the entrance geomagnetic induction sensor component and the exit geomagnetic induction sensor component, realizes the vehicle counting of a goods yard or a parking lot, and displays the data on a display screen through a counting output module. The entrance geomagnetic sensor interface 405 is an I/O port for switching the received radio signal of the entrance geomagnetic sensor module LoRaWAN protocol to the microcontroller MCU. The outlet geomagnetic sensor interface 403 is an I/O port for transferring the received radio signal of the outlet geomagnetic sensor assembly LoRaWAN protocol to the microcontroller MCU. And a counting output module 406 for outputting the calculation result of the MCU to a display screen for display.

The working principle of the utility model is as follows: according to the principle that a moving vehicle can generate induction pulses through the vicinity of a magnetic induction sensor, the magnetic induction sensor arranged at the entrance and exit of a parking lot or a goods yard collects, analyzes and counts signals uniformly through a vehicle main controller, and transmits a counting result to a display screen for displaying.

The scope of the utility model is indicated by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A geomagnetic induction motor vehicle counting device for a goods yard or a parking lot is characterized by comprising a geomagnetic inductor arranged at an entrance of the goods yard or the parking lot; a geomagnetic sensor disposed at an exit of the goods yard or the parking lot; a display screen at the entrance of the parking lot; the vehicle counting controller comprises an Ethernet interface, an ISP (Internet service provider) conversion function module, a microcontroller MCU (microprogrammed control Unit), an inlet geomagnetic sensor interface, an outlet geomagnetic sensor interface and a counting output module.

2. The geomagnetic induction motor vehicle counting apparatus for goods yard or parking lot according to claim 1, wherein: the geomagnetic sensor at the entrance or the exit of the goods yard or the parking lot consists of a geomagnetic sensor device, a PCB (printed Circuit Board), a power module, a wireless transmitting module and a shell.

3. The geomagnetic induction motor vehicle counting apparatus for goods yard or parking lot according to claim 1, wherein: the display screen at the entrance of the parking lot is an LED strip-shaped display screen, is small in size and single-color, facilitates programming of a user, and adopts an SPI communication mode and a port lightning protection design.

4. The geomagnetic induction motor vehicle counting device for goods yard or parking lot according to claim 2, wherein: the PCB improves the electromagnetic compatibility characteristic of the device through the optimization of a PCB wiring power supply and a grounding part, and the peripheral wiring of the wireless transmitting module is optimized; the power module uses 2 power supply modes of a rechargeable lithium battery and a 220V alternating current power supply; the wireless transmitting module realizes functions based on a LoRaWAN protocol; the shell is made of hard engineering plastics or aluminum materials, and the bottom of the shell is provided with an assembly screw hole and a screw; the screw is in a settlement mode, and after the screw is screwed tightly, a hole displayed on the surface of the base is plugged by a rubber plug so as to be beneficial to water and moisture prevention.