CN106846825B - Geomagnetic vehicle detector, geomagnetic vehicle detection system and geomagnetic vehicle detection method - Google Patents
Geomagnetic vehicle detector, geomagnetic vehicle detection system and geomagnetic vehicle detection method Download PDFInfo
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- CN106846825B CN106846825B CN201710222218.5A CN201710222218A CN106846825B CN 106846825 B CN106846825 B CN 106846825B CN 201710222218 A CN201710222218 A CN 201710222218A CN 106846825 B CN106846825 B CN 106846825B
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- G08G1/00—Traffic control systems for road vehicles
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- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The embodiment of the invention provides a geomagnetic vehicle detector, a geomagnetic vehicle detection system and a geomagnetic vehicle detection method, and relates to the technical field of intelligent transportation. The geomagnetic vehicle detector comprises a microprocessor, a power supply module, a first magnetic sensor module and a second magnetic sensor module. The microprocessor is electrically connected with the second magnetic sensor module, the first magnetic sensor module and the power supply module respectively. The power module is electrically connected with the second magnetic sensor module and the first magnetic sensor module respectively. The power supply module is controlled to provide electric energy for the second magnetic sensor module through the microprocessor at regular time, second magnetic field data acquired by the second magnetic sensor module are received, whether the second magnetic field data reach a preset value or not is judged, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in a region to be detected are received and obtained based on the second magnetic field data and the first magnetic field data, and therefore low-power consumption operation of the geomagnetic vehicle detector is achieved.
Description
Technical Field
The invention relates to the technical field of intelligent transportation, in particular to a geomagnetic vehicle detector, a geomagnetic vehicle detection system and a geomagnetic vehicle detection method.
Background
Currently, geomagnetic vehicle detectors (hereinafter referred to as 'vehicle detectors') are mainly used for detecting and analyzing field information such as the existence state, the direction, the speed and the like of vehicles in an intelligent transportation system (hereinafter referred to as 'ITS'), and are core functional components of an ITS perception layer. In recent years, with the vigorous development of intelligent traffic applications such as urban roadside parking, car detectors find some problems in long-term engineering practice to be in need of optimization and improvement. For example, the existing car detectors almost all use three-axis magnetic sensors to collect magnetic field data in a timing power-on scanning mode so as to analyze the arrival and departure of a car, and under the working environment of a high and cold area, the instantaneous discharge capacity of a battery is severely limited, so that equipment is disabled, and the normal development of business is seriously affected.
Disclosure of Invention
The present invention aims to provide a geomagnetic vehicle detector, a geomagnetic vehicle detection system and a geomagnetic vehicle detection method, which can improve the problems. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, an embodiment of the present invention provides a geomagnetic vehicle detector, which includes a microprocessor, a power supply module, a first magnetic sensor module, and a second magnetic sensor module. The microprocessor is electrically connected with the second magnetic sensor module, the first magnetic sensor module and the power supply module respectively. The power supply module is electrically connected with the second magnetic sensor module and the first magnetic sensor module respectively. The first magnetic sensor module is used for collecting first magnetic field data of the vehicle in the to-be-detected area in a first direction and sending the first magnetic field data to the microprocessor. The second magnetic sensor module is used for collecting second magnetic field data of the vehicle in the to-be-detected area in a second direction and sending the second magnetic field data to the microprocessor. The microprocessor is used for controlling the power supply module to provide electric energy for the second magnetic sensor module at regular time, receiving second magnetic field data acquired by the second magnetic sensor module and judging whether the second magnetic field data reach a preset value, if yes, controlling the power supply module to provide electric energy for the first magnetic sensor module, receiving and obtaining vehicle analysis data in the to-be-detected area based on the second magnetic field data and the first magnetic field data, wherein the vehicle analysis data represents whether vehicles exist in the to-be-detected area.
In a preferred embodiment of the present invention, the geomagnetic vehicle detector further includes a communication module. The communication module is respectively and electrically connected with the microprocessor and the power supply module. And the microprocessor is also used for controlling the communication module to send the vehicle analysis data to the background server when judging that the vehicle analysis data meets the preset condition. The microprocessor is also used for controlling the communication module to enter a dormant state after detecting that the communication module sends the vehicle analysis data to the background server so as to realize that the geomagnetic vehicle detector works normally with low power consumption.
In a preferred embodiment of the present invention, the first magnetic sensor module includes an X-axis magnetic sensor, a Y-axis magnetic sensor, and a two-way amplifying circuit. One end of the X-axis magnetic sensor is electrically connected with the first output end of the power module, and the other end of the X-axis magnetic sensor is electrically connected with the first end of the two-way amplifying circuit. One end of the Y-axis magnetic sensor is electrically connected with the first output end of the power supply module, and the other end of the Y-axis magnetic sensor is electrically connected with the first end of the two-way amplifying circuit. The second end of the two-way amplifying circuit is electrically connected with the first output end of the power supply module. The third end of the two-way amplifying circuit is electrically connected with the first input end of the microprocessor. The X-axis magnetic sensor is used for collecting first magnetic field data of the vehicle in the to-be-detected area in the X-axis direction on the ground plane and sending the first magnetic field data to the microprocessor. The Y-axis magnetic sensor is used for collecting first magnetic field data of the vehicle in the to-be-detected area in the Y-axis direction on the ground plane and sending the first magnetic field data to the microprocessor.
In a preferred embodiment of the present invention, the second magnetic sensor module includes a Z-axis magnetic sensor and a one-way amplifying circuit. And the second output end of the power supply module is respectively and electrically connected with one end of the Z-axis magnetic sensor and the first end of the single-path amplifying circuit. The other end of the Z-axis magnetic sensor is electrically connected with the second end of the single-path amplifying circuit. And the third end of the single-path amplifying circuit is electrically connected with the second input end of the microprocessor. The Z-axis magnetic sensor is used for collecting second magnetic field data of the vehicle in the to-be-detected area in the direction perpendicular to the Z-axis on the ground plane and sending the second magnetic field data to the microprocessor.
In a preferred embodiment of the present invention, the single-path amplifying circuit is a single-path operational amplifier. The two-way amplifying circuit is a two-way operational amplifier.
In a preferred embodiment of the present invention, the X-axis magnetic sensor, the Y-axis magnetic sensor, and the Z-axis magnetic sensor are anisotropic magneto-resistance sensors, tunneling magneto-resistance sensors, or giant magneto-resistance sensors.
In a preferred embodiment of the present invention, the communication module includes an NBIOT communication module and a transceiver antenna electrically connected to the NBIOT communication module. And the power end of the NBIOT communication module is electrically connected with the third output end of the power module. And the communication end of the NBIOT communication module is electrically connected with the communication end of the microprocessor.
In a preferred embodiment of the present invention, the power module includes a power supply circuit, a voltage stabilizing circuit, and a switching circuit module. One end of the voltage stabilizing circuit is electrically connected with the power supply circuit, and the other end of the voltage stabilizing circuit is electrically connected with the switch circuit module, the power end of the microprocessor and the power end of the communication module respectively. The switching circuit module includes a first switching circuit and a second switching circuit. The first switch circuit is electrically connected with the control end of the microprocessor and the second magnetic sensor module respectively. The second switch circuit is respectively and electrically connected with the control end of the microprocessor and the first magnetic sensor module.
In a second aspect, an embodiment of the present invention provides a geomagnetic vehicle detection system, where the system includes a user terminal and the geomagnetic vehicle detector, and the user terminal is connected with the geomagnetic vehicle detector through a network.
In a third aspect, an embodiment of the present invention provides a geomagnetic vehicle detection method, which is applied to the geomagnetic vehicle detector, where the method includes: the first magnetic sensor module collects first magnetic field data of the vehicle in the to-be-detected area in a first direction and sends the first magnetic field data to the microprocessor; the second magnetic sensor module collects second magnetic field data of the vehicle in the to-be-detected area in a second direction and sends the second magnetic field data to the microprocessor; the microprocessor controls the power supply module to provide electric energy for the second magnetic sensor module at regular time, receives second magnetic field data acquired by the second magnetic sensor module and judges whether the second magnetic field data reach a preset value, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and the vehicle analysis data represent whether vehicles exist in the to-be-detected area.
The embodiment of the invention provides a geomagnetic vehicle detector, a geomagnetic vehicle detection system and a geomagnetic vehicle detection method. The microprocessor is electrically connected with the second magnetic sensor module, the first magnetic sensor module and the power supply module respectively. The power supply module is electrically connected with the second magnetic sensor module and the first magnetic sensor module respectively. The power supply module is controlled to provide electric energy for the second magnetic sensor module at regular time through the microprocessor, second magnetic field data acquired by the second magnetic sensor module are received, whether the second magnetic field data reach a preset value or not is judged, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and whether vehicles exist in the to-be-detected area or not is represented by the vehicle analysis data. Thus, the geomagnetic vehicle detector can work with low power consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a geomagnetic vehicle detector according to a first embodiment of the present invention;
FIG. 2 is a block diagram of another geomagnetic vehicle detector according to a first embodiment of the present invention;
FIG. 3 is a block diagram showing a power module of a geomagnetic vehicle detector according to a first embodiment of the present invention;
fig. 4 is a block diagram of a power module in a geomagnetic vehicle detector according to a further embodiment of the present invention;
fig. 5 is a circuit configuration diagram of a power module in still another geomagnetic vehicle detector according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a geomagnetic vehicle detection system according to a second embodiment of the present invention;
fig. 7 is a flowchart of a geomagnetic vehicle detection method according to a third embodiment of the present invention.
In the figure: 100-geomagnetic vehicle detector; 110-a microprocessor; 120-a power module; 121-a power supply circuit; 122-a voltage stabilizing circuit; 123-a switching circuit module; 123 a-a first switching circuit; 123 b-a second switching circuit; 130-a first magnetic sensor module; 131-X axis magnetic sensor; a 132-Y axis magnetic sensor; 133-two-way amplifying circuit; 140-a second magnetic sensor module; 141-Z axis magnetic sensor; 142-a single-pass amplifying circuit; 150-a communication module; 151-NBIOT communication module; 152-a transceiver antenna; 200-system; 210-user terminal; 220-network.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, the azimuth or positional relationship indicated by the term "vertical" or the like is based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, only for convenience of description and simplification of description, and is not to indicate or imply that the apparatus or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and may be a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a geomagnetic vehicle detector 100, where the geomagnetic vehicle detector 100 includes a microprocessor 110, a power supply module 120, a first magnetic sensor module 130, and a second magnetic sensor module 140. The microprocessor 110 is electrically connected to the second magnetic sensor module 140, the first magnetic sensor module 130, and the power module 120, respectively. The power module 120 is electrically connected to the second magnetic sensor module 140 and the first magnetic sensor module 130, respectively.
The first magnetic sensor module 130 is configured to collect first magnetic field data of the vehicle in the first direction in the area to be detected and send the first magnetic field data to the microprocessor 110. The second magnetic sensor module 140 is configured to collect second magnetic field data of the vehicle in the to-be-detected area in a second direction and send the second magnetic field data to the microprocessor 110. The microprocessor 110 is configured to control the power module 120 to provide power to the second magnetic sensor module 140 at regular time, receive second magnetic field data collected by the second magnetic sensor module 140, and determine whether the second magnetic field data reaches a preset value, if yes, control the power module 120 to provide power to the first magnetic sensor module 130, receive and obtain vehicle analysis data in the to-be-detected area based on the second magnetic field data and the first magnetic field data, where the vehicle analysis data characterizes whether a vehicle is in the to-be-detected area. The area to be detected may be a parking space area. The timing may be every second.
Referring to fig. 2, the geomagnetic vehicle detector 100 may further include a communication module 150. The communication module 150 is electrically connected to the microprocessor 110 and the power module 120, respectively. The microprocessor 110 is further configured to control the communication module 150 to send the vehicle analysis data to a background server when the vehicle analysis data meets a preset condition.
The microprocessor 110 is further configured to control the communication module 150 to enter a sleep state after detecting that the communication module 150 sends the vehicle analysis data to the background server, so as to enable the geomagnetic vehicle detector 100 to work normally with low power consumption. The background server can be a cloud server and a local server. In this embodiment, the microprocessor 110 may be a 24LE1 chip from Nordic corporation.
Referring to fig. 2 and 3 in combination, the first magnetic sensor module 130 includes an X-axis magnetic sensor 131, a Y-axis magnetic sensor 132, and a dual-path amplifying circuit 133. One end of the X-axis magnetic sensor 131 is electrically connected to the first output end of the power module 120, and the other end of the X-axis magnetic sensor 131 is electrically connected to the first end of the two-way amplifying circuit 133. One end of the X-axis magnetic sensor 131 may be a power supply end of the X-axis magnetic sensor 131. One end of the Y-axis magnetic sensor 132 is electrically connected to the first output terminal of the power module 120, and the other end of the Y-axis magnetic sensor 132 is electrically connected to the first end of the two-way amplifying circuit 133. One end of the Y-axis magnetic sensor 132 may be a power end of the Y-axis magnetic sensor 132. A second end of the two-way amplifying circuit 133 is electrically connected to the first output end of the power module 120. A third terminal of the two-way amplifying circuit 133 is electrically connected to the first input terminal of the microprocessor 110.
The X-axis magnetic sensor 131 is configured to collect first magnetic field data of the vehicle in the to-be-detected area in the X-axis direction on the ground plane and send the first magnetic field data to the microprocessor 110. The Y-axis magnetic sensor 132 is configured to collect first magnetic field data of the vehicle in the to-be-detected area in the Y-axis direction on the ground plane and send the first magnetic field data to the microprocessor 110. The first magnetic field data in the first direction includes the first magnetic field data in the X-axis direction on the ground plane and the first magnetic field data in the Y-axis direction on the ground plane.
Referring to fig. 2 and 3 in combination, the second magnetic sensor module 140 includes a Z-axis magnetic sensor 141 and a single-path amplifying circuit 142. The second output end of the power module 120 is electrically connected to one end of the Z-axis magnetic sensor 141 and the first end of the single-path amplifying circuit 142, respectively. The other end of the Z-axis magnetic sensor 141 is electrically connected to a second end of the one-way amplifying circuit 142. One end of the Z-axis magnetic sensor 141 may be a power end of the Z-axis magnetic sensor 141. A third terminal of the single-pass amplifying circuit 142 is electrically connected to a second input terminal of the microprocessor 110. The Z-axis magnetic sensor 141 is configured to collect second magnetic field data of the vehicle in the to-be-detected area in a direction perpendicular to the Z-axis direction on the ground plane, and send the second magnetic field data to the microprocessor 110. The second magnetic field data in the second direction is the second magnetic field data perpendicular to the Z-axis direction on the ground plane.
The microprocessor 110 has a low power consumption characteristic, and can collect the amplified analog signals of the X-axis magnetic sensor 131, the Y-axis magnetic sensor 132 and the Z-axis magnetic sensor 141 through the ADC interface, and can control whether the first output end or the second output end of the power module 120 outputs a power supply through the control end of the microprocessor 110; the communication end of the microprocessor 110 is in data communication with the background server through the communication module 150. The microprocessor 110 is used for respectively and regularly controlling the power supply work of the Z-axis sensor, the X-axis sensor and the Y-axis sensor, the Z-axis which is most sensitive to the change of the vehicle is adopted for detecting the change of the magnetic field, and the Z-axis is used as a trigger source for waking up the work of other components, so that the power consumption which is expended due to the change of the daily scanning magnetic field is greatly reduced by two thirds. Due to the optimization and improvement of the scanning mechanism, the geomagnetic vehicle detector 100 has stronger adaptability to the environment and climate, namely, the energy damage caused by high temperature is less, and the low current can maintain the normal operation of the geomagnetic vehicle detector 100 at low temperature.
As one embodiment, the single-pass amplifying circuit 142 is a single-pass operational amplifier. The two-way amplifying circuit 133 is a two-way operational amplifier. Preferably, the single-path operational amplifier and the double-path operational amplifier are single-power supply CMOS operational amplifiers, have wider bandwidth, low power supply voltage and low quiescent current consumption, and can be used as driving amplifiers of the A/D converter. In this embodiment, the single-path operational amplifier and the double-path operational amplifier may be MCP6001, MCP6002 of Microchip company.
As one embodiment, the X-axis magnetic sensor 131, the Y-axis magnetic sensor 132, and the Z-axis magnetic sensor 141 are each an anisotropic magneto-resistance sensor, a tunneling magneto-resistance sensor, or a giant magneto-resistance sensor. Preferably, the X-axis magnetic sensor 131 and the Y-axis magnetic sensor 132 are sensors that accurately detect the change of the earth magnetic field in the X-axis direction and the Y-axis direction of the ground plane using a magnetoresistive technology and output corresponding electric signals, respectively, and have characteristics of wide dynamic range, high sensitivity, low hysteresis, and low power consumption. In this embodiment, the X-axis magnetic sensor 131 and the Y-axis magnetic sensor 132 may be TMR2102 chips of Jiangsu multidimensional company. The Z-axis magnetic sensor 141 is a sensor that accurately detects a change in the earth's magnetic field in a direction perpendicular to the ground plane using a magnetoresistive technology and outputs a corresponding electrical signal, and has characteristics of a wide dynamic range, high sensitivity, low hysteresis, and low power consumption. In this embodiment, the Z-axis magnetic sensor 141 may be a TMR2102 chip of Jiangsu multidimensional company. Therefore, the problems that the current car detectors almost all use the triaxial magnetic sensor to collect magnetic field data in a timing power-on scanning mode to analyze the arrival and departure of the car, and the instantaneous discharge capacity of the battery is severely limited to cause equipment failure and seriously affect the normal development of the service in the working environment of the alpine region are solved.
Referring to fig. 3, the communication module 150 includes an NBIOT communication module 151 and a transceiver antenna 152 electrically connected to the NBIOT communication module 151. NBIOT communication module 151 is an NB-IoT communication module. The power end of the NBIOT communication module 151 is electrically connected to the third output end of the power module 120. The communication end of the NBIOT communication module 151 is electrically connected with the communication end of the microprocessor 110. The NBIOT communication module 151 is a functional component for realizing low power consumption and wide coverage by using the NBIOT narrowband internet of things technology, and performing wireless data communication with a background server through China telecom, china Mobile or China Unicom operator network. In this embodiment, the NBIOT communication module 151 is a Shanghai remote Quectol BC95 communication module. By using the NBIOT technology, the extra energy consumption caused by data transmission of the geomagnetic vehicle detector 100 is also greatly reduced, the overall power consumption of the product is controllable, the installation, use and maintenance costs of the product are greatly reduced, and the geomagnetic vehicle detector is energy-saving and environment-friendly. Therefore, the problem that the existing vehicle detectors are all in networking communication with the private base station in a network node mode, and when the vehicle detectors installed on the parking space generate signal attenuation due to the fact that vehicles reach the vehicle detectors to cover the vehicle detectors, the signal shielding is caused, and larger electric energy is consumed additionally is solved.
Referring to fig. 3 and fig. 4 in combination, the power module 120 includes a power supply circuit 121, a voltage stabilizing circuit 122, and a switching circuit module 123. One end of the voltage stabilizing circuit 122 is electrically connected to the power supply circuit 121, and the other end is electrically connected to the switch circuit module 123, the power end of the microprocessor 110, and the power end of the communication module 150, respectively. The switching circuit module 123 includes a first switching circuit 123a and a second switching circuit 123b. The first switch circuit 123a is electrically connected to the control terminal of the microprocessor 110 and the second magnetic sensor module 140, respectively. The second switch circuit 123b is electrically connected to the control terminal of the microprocessor 110 and the first magnetic sensor module 130, respectively. The voltage stabilizing circuit 122 may be a voltage stabilizer. The first switching circuit 123a includes a first switch, and the second switching circuit 123b includes a second switch.
The power module 120 is a functional unit for performing power management on the configured lithium battery, and provides power for the microprocessor 110 and the communication module 150 through a third output end of the power module 120, so as to determine whether to output power required by the operation of the corresponding component through a first output end or a second output end of the power module 120 according to a control requirement of the microprocessor 110. Therefore, the problem that the service life of a product is greatly shortened due to large electric energy damage caused by long-time high-temperature operation in summer high-temperature weather is solved by commonly using a disposable high-capacity lithium battery for power supply of the conventional vehicle detector.
Further, as an implementation manner, referring to fig. 3, 4 and 5 in combination, an embodiment of the present invention provides a circuit structure diagram of a power module 120 in a geomagnetic vehicle detector 100, where B1 is a battery, LDO is a voltage stabilizer, K1 is a first switch, K2 is a second switch, one end of the battery is grounded, the other end of the battery is connected to the voltage stabilizer, and an output voltage VCC2 of the voltage stabilizer may be 3.0V. The output end of the voltage stabilizer is respectively connected with a first switch K1, a second switch K2 and a B4 unit. The first switch K1 is a control switch, and a control end IO1 thereof is connected to the microprocessor 110, and one end thereof is also connected to the B2 unit. The second switch K2 is a control switch, and its control terminal IO2 is connected to the microprocessor 110, and one end is further connected to the B3 unit. Wherein the B4 unit may include a microprocessor 110 and a communication module 150. The B2 unit may include a second magnetic sensor module 140. The B3 unit may include the first magnetic sensor module 130.
The geomagnetic vehicle detector 100 provided by the embodiment of the invention has the following working principle:
when the geomagnetic vehicle detector 100 is powered on, the power module 120 outputs the working power to the microprocessor 110 and the NBIOT communication module 151; the microprocessor 110 further initializes the NBIOT communication module 151 after finishing the self-initialization, and controls the NBIOT communication module 151 to be in a dormant state; the microprocessor 110 controls the second output end of the power module 120 to power on the Z-axis magnetic sensor 141 and the single-path amplifying circuit 142 through the controller control end every second, so as to detect the magnetic field fluctuation and determine whether the second magnetic field data, which is acquired by the Z-axis magnetic sensor 141 and is perpendicular to the Z-axis direction on the ground plane, of the vehicle in the region to be detected reaches a preset value.
If yes, the microprocessor 110 further controls the first output end of the power module 120 to power up the X-axis magnetic sensor 131, the Y-axis magnetic sensor 132 and the dual-path amplifying circuit 133 through the control end of the microprocessor 110, and the X-axis magnetic sensor 131 collects the first magnetic field data of the vehicle in the to-be-detected area in the X-axis direction on the ground plane and sends the first magnetic field data to the microprocessor 110; the Y-axis magnetic sensor 132 collects first magnetic field data of the vehicle in the to-be-detected area in the Y-axis direction on the ground plane and sends the first magnetic field data to the microprocessor 110; and receiving and acquiring vehicle analysis data in the to-be-detected area based on the second magnetic field data and the first magnetic field data of the X axis and the Y axis, wherein the vehicle analysis data represents whether a vehicle exists in the to-be-detected area. After each time of data collection, the microprocessor 110 controls the first output end and the second output end of the power module 120 to stop outputting power so as to achieve the purpose of greatly reducing power consumption.
When the microprocessor 110 determines that the vehicle analysis data meets a preset condition, the NBIOT communication module 151 is controlled to send the vehicle analysis data to a background server, wherein the preset condition is that a vehicle arrival or departure event occurs. After detecting that the NBIOT communication module 151 sends the vehicle analysis data to the background server, the microprocessor 110 controls the NBIOT communication module 151 to enter a sleep state, so as to realize that the geomagnetic vehicle detector 100 works normally with low power consumption.
The geomagnetic vehicle detector comprises a microprocessor, a power supply module, a first magnetic sensor module and a second magnetic sensor module. The microprocessor is electrically connected with the second magnetic sensor module, the first magnetic sensor module and the power supply module respectively. The power supply module is electrically connected with the second magnetic sensor module and the first magnetic sensor module respectively. The power supply module is controlled to provide electric energy for the second magnetic sensor module at regular time through the microprocessor, second magnetic field data acquired by the second magnetic sensor module are received, whether the second magnetic field data reach a preset value or not is judged, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and whether vehicles exist in the to-be-detected area or not is represented by the vehicle analysis data. Thus, the geomagnetic vehicle detector can work with low power consumption.
Second embodiment
Referring to fig. 6, the present embodiment provides a geomagnetic vehicle detection system 200, where the system 200 includes a user terminal 210 and the geomagnetic vehicle detector 100 described above. The user terminal 210 is connected to the geomagnetic vehicle detector 100 through a network 220. The user terminal 210 may be a mobile terminal, such as a mobile phone, a tablet computer, etc. The network 220 may be a wired network or a wireless network. The geomagnetic vehicle detector 100 may send vehicle analysis data to the user terminal 210 through the network 220, obtain arrival or departure information of the vehicle based on the vehicle analysis data, and may be used as an application such as charging, so as to bring convenience experience to the user.
The embodiment of the invention provides a geomagnetic vehicle detection system, which comprises a user terminal and the geomagnetic vehicle detector, wherein the user terminal is connected with the geomagnetic vehicle detector through a network. Therefore, the convenient experience is brought to the user.
Third embodiment
Referring to fig. 7, an embodiment of the present invention provides a geomagnetic vehicle detection method, which is applied to the geomagnetic vehicle detector 100, and includes:
step S300: the first magnetic sensor module collects first magnetic field data of the vehicle in the to-be-detected area in a first direction and sends the first magnetic field data to the microprocessor;
step S310: the second magnetic sensor module collects second magnetic field data of the vehicle in the to-be-detected area in a second direction and sends the second magnetic field data to the microprocessor;
step S320: the microprocessor controls the power supply module to provide electric energy for the second magnetic sensor module at regular time, receives second magnetic field data acquired by the second magnetic sensor module and judges whether the second magnetic field data reach a preset value, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and the vehicle analysis data represent whether vehicles exist in the to-be-detected area.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the geomagnetic vehicle detection method described above may refer to the corresponding process in the geomagnetic vehicle detector embodiment described above, and will not be described in detail herein.
The embodiment of the invention provides a geomagnetic vehicle detection method, which comprises the steps that a first magnetic sensor module collects first magnetic field data of a vehicle in a to-be-detected area in a first direction and sends the first magnetic field data to a microprocessor; the second magnetic sensor module collects second magnetic field data of the vehicle in the to-be-detected area in a second direction and sends the second magnetic field data to the microprocessor; the microprocessor controls the power supply module to provide electric energy for the second magnetic sensor module at regular time, receives second magnetic field data acquired by the second magnetic sensor module and judges whether the second magnetic field data reach a preset value, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and the vehicle analysis data represent whether vehicles exist in the to-be-detected area. Thus, the geomagnetic vehicle detector can work with low power consumption.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The geomagnetic vehicle detector is characterized by comprising a microprocessor, a power supply module, a first magnetic sensor module and a second magnetic sensor module, wherein the microprocessor is respectively and electrically connected with the second magnetic sensor module, the first magnetic sensor module and the power supply module, and the power supply module is respectively and electrically connected with the second magnetic sensor module and the first magnetic sensor module;
the first magnetic sensor module is used for collecting first magnetic field data of the vehicle in a first direction in the area to be detected and sending the first magnetic field data to the microprocessor;
the second magnetic sensor module is used for collecting second magnetic field data of the vehicle in the to-be-detected area in a second direction and sending the second magnetic field data to the microprocessor;
the microprocessor is used for controlling the power supply module to provide electric energy for the second magnetic sensor module at regular time, receiving second magnetic field data acquired by the second magnetic sensor module and judging whether the second magnetic field data reach a preset value, if yes, controlling the power supply module to provide electric energy for the first magnetic sensor module, receiving and obtaining vehicle analysis data in the to-be-detected area based on the second magnetic field data and the first magnetic field data, wherein the vehicle analysis data represents whether vehicles exist in the to-be-detected area;
the first magnetic sensor module comprises an X-axis magnetic sensor and a Y-axis magnetic sensor, and the X-axis magnetic sensor is used for collecting first magnetic field data of a vehicle in the area to be detected in the X-axis direction on the ground plane and sending the first magnetic field data to the microprocessor; the Y-axis magnetic sensor is used for collecting first magnetic field data of the vehicle in the to-be-detected area in the Y-axis direction on the ground plane and sending the first magnetic field data to the microprocessor; the second magnetic sensor module comprises a Z-axis magnetic sensor, and the Z-axis magnetic sensor is used for collecting second magnetic field data of the vehicle in the area to be detected in the direction perpendicular to the Z-axis on the ground plane and sending the second magnetic field data to the microprocessor.
2. The geomagnetic vehicle detector of claim 1, further comprising a communication module electrically connected to the microprocessor and the power supply module, respectively, the microprocessor further configured to control the communication module to send the vehicle analysis data to a background server when it is determined that the vehicle analysis data meets a preset condition;
the microprocessor is also used for controlling the communication module to enter a dormant state after detecting that the communication module sends the vehicle analysis data to the background server so as to realize that the geomagnetic vehicle detector works normally with low power consumption.
3. The geomagnetic vehicle detector of claim 2, wherein the first magnetic sensor module further includes a two-way amplifying circuit, one end of the X-axis magnetic sensor is electrically connected to the first output terminal of the power supply module, the other end of the X-axis magnetic sensor is electrically connected to the first end of the two-way amplifying circuit, one end of the Y-axis magnetic sensor is electrically connected to the first output terminal of the power supply module, the other end of the Y-axis magnetic sensor is electrically connected to the first end of the two-way amplifying circuit, the second end of the two-way amplifying circuit is electrically connected to the first output terminal of the power supply module, and the third end of the two-way amplifying circuit is electrically connected to the first input terminal of the microprocessor.
4. A geomagnetic vehicle detector according to claim 3, wherein the second magnetic sensor module further comprises a single-path amplifying circuit, the second output end of the power supply module is electrically connected with one end of the Z-axis magnetic sensor and the first end of the single-path amplifying circuit, the other end of the Z-axis magnetic sensor is electrically connected with the second end of the single-path amplifying circuit, and the third end of the single-path amplifying circuit is electrically connected with the second input end of the microprocessor.
5. The geomagnetic vehicle detector of claim 4, wherein the one-way amplifying circuit is a one-way operational amplifier, and the two-way amplifying circuit is a two-way operational amplifier.
6. The geomagnetic vehicle detector of claim 4, wherein the X-axis magnetic sensor, the Y-axis magnetic sensor, and the Z-axis magnetic sensor are each an anisotropic magnetoresistive sensor, a tunneling magnetoresistive sensor, or a giant magnetoresistive sensor.
7. The geomagnetic vehicle detector of claim 2, wherein the communication module includes an NBIOT communication module and a transceiver antenna electrically connected to the NBIOT communication module, a power supply terminal of the NBIOT communication module is electrically connected to a third output terminal of the power supply module, and a communication terminal of the NBIOT communication module is electrically connected to a communication terminal of the microprocessor.
8. The geomagnetic vehicle detector of claim 2, wherein the power supply module includes a power supply circuit, a voltage stabilizing circuit, and a switching circuit module, one end of the voltage stabilizing circuit is electrically connected to the power supply circuit, the other end is electrically connected to the switching circuit module, a power supply end of the microprocessor, and a power supply end of the communication module, the switching circuit module includes a first switching circuit and a second switching circuit, the first switching circuit is electrically connected to a control end of the microprocessor and the second magnetic sensor module, and the second switching circuit is electrically connected to a control end of the microprocessor and the first magnetic sensor module.
9. A geomagnetic vehicle detection system, characterized in that the system comprises a user terminal and a geomagnetic vehicle detector as claimed in any of the claims 2-8, the user terminal being connected to the geomagnetic vehicle detector via a network.
10. A geomagnetic vehicle detection method, applied to a geomagnetic vehicle detector as set forth in any one of claims 1 to 8, including:
the first magnetic sensor module collects first magnetic field data of the vehicle in the to-be-detected area in a first direction and sends the first magnetic field data to the microprocessor;
the second magnetic sensor module collects second magnetic field data of the vehicle in the to-be-detected area in a second direction and sends the second magnetic field data to the microprocessor;
the microprocessor controls the power supply module to provide electric energy for the second magnetic sensor module at regular time, receives second magnetic field data acquired by the second magnetic sensor module and judges whether the second magnetic field data reach a preset value, if yes, the power supply module is controlled to provide electric energy for the first magnetic sensor module, vehicle analysis data in the to-be-detected area are received and obtained based on the second magnetic field data and the first magnetic field data, and the vehicle analysis data represent whether vehicles exist in the to-be-detected area.
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