KR200176062Y1 - Apparatus for detecting an automobile with solar cells - Google Patents

Abstract

The present invention relates to a vehicle detecting device for detecting a current state of a vehicle on a vehicle or a road, and more particularly, to a vehicle detecting device employing a solar cell as a power source. Vehicle sensing apparatus of the present invention is a solar cell module including a plurality of solar cells for converting solar energy into electrical energy; A storage battery charging electrical energy generated by the solar cell module; A charge controller that prevents overdischarge and overcharge of electrical energy supplied from the solar cell module to the storage battery and selectively controls the output of the electrical energy supplied from the storage battery 130 and the solar cell module 120; And an inverter which converts the DC voltage output from the charge controller into an AC voltage in order to supply the voltage stabilization circuit with solar cells in a region where power is not supplied. As such, the vehicle detecting apparatus is provided with a solar cell, so that the vehicle detecting apparatus can be installed on the road at a low economic cost.

Description

Vehicle sensing device with solar cell {APPARATUS FOR DETECTING AN AUTOMOBILE WITH SOLAR CELLS}

The present invention relates to a vehicle detection device for detecting a current state of a vehicle on the road, and more particularly to a vehicle detection device using a solar cell as a power source.

Various types of devices are used to track the flow of vehicles on the road. For example, at intersections with heavy traffic, road traffic is detected by detecting vehicles passing through the intersection using CCD video cameras or sensors. In addition, the above devices are used to detect the passing of the vehicle in a parking building or a general large building as well as on the road to grasp the parking state in the building.

However, in the case of using a video camera, there are few problems in indoors such as buildings, but in the case of outdoor or nighttime weather changes frequently, the brightness or weather changes are affected. In addition, there is a disadvantage in that a high cost for management such as cleaning the lens of the camera periodically. In addition, in order to measure the speed and number of vehicles by visually determining the video signal transmitted from the camera, it is necessary to develop a software for processing a separate video signal and have a large amount of data to be processed as well as a large storage capacity. The cost of hardware was also a big burden.

In addition to the use of the CCD camera, there are devices employing sensors such as vehicle-sensitive, metal-sensitive, or shape-sensitive as vehicles used on highways where vehicles travel at high speeds.

A vehicle-sensitive sensor is a type in which a rubber tubing is placed on a road surface and a sensor is placed therein. When a vehicle pushes a rubber tube, the tube is pressurized to generate a signal from the sensor. That is, two signals are generated when a small car passes, and two or three signals are generated when a large car passes.

Metal-sensitive sensors use magnetic sensors. The shape-sensitive sensor is a method of sensing the shape or speed of a vehicle by using an ultrasonic transducer of a vehicle by hanging an ultrasonic transducer 5 to 7 m above the ground. In addition, there are many forms using Doppler radar, microwave or laser.

However, in the case of the vehicle-sensitive sensor, it is very likely to be damaged by cars traveling at high speeds, and the metal-sensitive sensor is sensitive to the influence of the surrounding environment, which makes it difficult to accurately detect the shape-sensitive sensor. There is a problem that it is extremely difficult to add additional functions in addition to the basic detection function.

In addition, a method of detecting a pressure of a vehicle applied to the coil by installing a loop coil on a road which is used in recent years and detecting an electric signal generated according to the coil is also used. However, in the reality that road conditions in Korea are mostly asphalt roads, not cement roads, irregularities are generated on roads due to changes in temperature, etc., and the installed detectors are damaged by more than 20 to 30% within a period of one or two years. As time goes by after installation, it loses its function as a detector.

Accordingly, the present applicant is to detect the peak value of the signal output from the sensor, for detecting the change in the magnetic field generated by the vehicle in the patent application No. 97-59860 filed November 13, 1997 to solve this problem A vehicle detection system comprising a peak value detector for detecting a signal, a first amplifier for amplifying a magnitude of a signal detected by the peak value detector, and a first comparison circuit for generating a pulse by comparing a signal output from the first amplifier with a reference value having a predetermined magnitude The device is proposed.

Such a device has almost permanent stability against physical changes in the surrounding environment or roads, and has an effect of accurately detecting a vehicle by measuring a change in the magnetic field generated in the vehicle.

In addition, the patent application filed on April 30, 1998 (name of the invention: 'Vehicle and Road Status Detection Device') proposed a detection device employing the above-described vehicle detection device. In such a device, a magnet generating magnetic force for each vehicle may be attached to detect a vehicle and a road state using the vehicle detection device.

Such vehicle and road condition detection devices are currently being applied while replacing existing devices on general roads.

The sensing device proposed by the present applicant does not need its own independent power source where the existing devices are installed, but operates by receiving power from the outside, and is located at a point where power can be supplied by connecting a wire. Because it did not need its own separate power supply.

However, when the sensing device is to be installed at a local road or highway, as well as a point where existing devices are installed, a problem may occur with respect to power supply. For example, there is a problem that the construction cost for supplying power to the apparatus is several times to several tens of times than the construction cost required for installing the vehicle sensing apparatus and related apparatus in a place such as a highway.

Therefore, there is a need for an apparatus that can generate power by itself without receiving power from the outside and operate without being influenced by an external environment.

In order to solve the above problems, an object of the present invention is to provide a vehicle and road condition sensing apparatus using a solar cell.

In order to achieve the above object, a vehicle and road condition detecting apparatus using a solar cell according to the present invention includes a sensor for detecting a change in a magnetic field generated by a vehicle; A peak value detector for detecting a peak value of a signal output from the sensor; A first amplifier for amplifying the magnitude of the signal detected by the peak value detector to a predetermined magnitude; A first comparison circuit configured to generate a pulse by comparing a signal output from the first amplifier with a reference value having a predetermined magnitude; And an output stabilization circuit for detecting a signal output to the first comparison circuit and stabilizing the output signal when a deviation occurs.

The output stabilization circuit may include: a zero comparison circuit configured to determine whether the detected signal is shifted up or down with respect to a reference voltage and to adjust the corresponding output signal up or down; A second comparison circuit for determining from the detected signal by comparing with a predetermined value whether or not the vehicle is stationary on a sensor; A pulse generator for generating pulses of a predetermined period according to the comparison result of the second comparison circuit; A flip-flop for changing a state of an output of a pulse generated in the pulse generator according to the output result to the non-conductor; A resistance network for adjusting an amount of current to be supplied to the sensor according to a pulse supplied from the flip-flop; And a second amplifier for amplifying a current to be supplied to the sensor according to an amplification ratio determined in the resistance network.

A solar cell module including a plurality of solar cells for converting solar energy into electrical energy;

A storage battery charging electric energy generated by the solar cell module;

A charge controller that prevents overdischarge and overcharge of electrical energy supplied from the solar cell module to the storage battery and selectively controls the output of the electrical energy supplied from the storage battery 130 and the solar cell module 120; And

It characterized in that it comprises a solar cell further comprises an inverter for converting the DC voltage output from the charge controller to an AC voltage in order to supply to the voltage stabilization circuit.

1 is a schematic block diagram of a vehicle detecting apparatus having a solar cell according to the present invention.

* Description of the symbols for the main parts of the drawings *

10 ... MID head 20 ... Voltage stabilization circuit

30 ... peak detection unit 40 ... DC amplifier

50 ... the first comparative circuit 60 ... to the church

70 ... second comparison circuit 80 ... pulse generator

90 ... flip-flop 100 ... resistance net

110 ... Amplifier 120 ... Solar Module

130 ... Storage battery 140 ... Charging controller

150 ... Inverter

Hereinafter, with reference to the accompanying drawings will be described a vehicle and a road status detecting apparatus using a solar cell according to the present invention.

1 is a view schematically showing an example of use of the vehicle and the road status detection apparatus using a solar cell according to the present invention. 1 to 10 are MID (Magneto-Inductance) head portion used as a sensor to detect the speed, quantity and number of vehicles in the present invention, 20 is a voltage for supplying a stable voltage to minimize the fluctuation of the power supply Stable circuit, 30 is a peak value detector for detecting and outputting a peak value in order to change the signal detected by the MID head portion 10 to DC, 40 is for amplifying the magnitude of the signal output from the peak value detector 30 at a predetermined magnification DC amplifier, 50 is a first comparison circuit for outputting a pulse by comparing the output from the DC amplifier 40 with a predetermined reference voltage to generate an output pulse for transmitting a signal to the microcomputer, 60 is a DC amplifier (40 ) Is a non-conductor that adjusts the output when it is shifted up or down about the reference point due to temperature, etc. Is a second comparison circuit for determining whether the vehicle is stopped on the sensor of the vehicle, 80 is a pulse generator for generating a pulse having a fixed width according to the result from the second comparison circuit 70, and 90 is a non-conductor Flip-flops for switching the output state according to the output of 60 to maintain the image state, 100 and 110 are resistor networks and amplifiers composed of a plurality of resistors, and a predetermined current in the secondary coil of the MID head 10. Supplies and amplifies the current to maintain the MID head 10 in a compensated state. And R1 and R2 are resistors used to adjust the size to provide a stable voltage.

The operation of each component in the above device is the same as the sensing device in the previous patent application, and the description of the part for supplying power to the above device is as follows.

120 is a solar cell module that connects the solar cells to convert the solar energy into electrical energy in series and parallel as necessary, 130 is a storage battery for storing the electrical energy generated in the solar cell module 120, 140 is a storage battery 130 It is a charge controller that prevents over-discharge and overcharge and selectively outputs the DC voltage supplied from the battery 130 and the solar cell module 120, and 150 uses the DC supplied from the battery 130 to operate the sensing device. The inverter converts into alternating current. The alternating current output from the inverter 150 is supplied to the voltage stabilization circuit 20 to operate a device for detecting the current state of the vehicle and the road.

By the solar cell module 120 and the charge controller 140 that controls the operation of the module and the battery 130, the charge that has been charged in the battery in the evening when the sun goes down is controlled by the charge controller 140 by the inverter 150. Is supplied to the voltage stabilization circuit 20 to operate the device.

In addition, in the sun floating state, the DC voltage generated in the solar cell module 120 is partially stored in the storage battery 130 by the charge controller 140, and part of the voltage stabilization circuit 20 is passed through the inverter 140. Is supplied to operate the device.

As described above, the present invention uses the generated power of the solar cell to charge the storage battery along with the operation of sensing the generated power of the solar power during the day, and the voltage stabilizes the circuit 20 by using the charge charged in the battery at night. Power can be supplied to make the sensing device operate stably.

Although the present invention has been specifically shown and described with reference to the above embodiments, it has been used for the purpose of illustration and those of ordinary skill in the art to which the invention pertains have the spirit and scope of the invention as defined in the appended claims. Various modifications can be made without departing.

Claims (1)

A sensor for detecting a change in the magnetic field generated by the vehicle; A peak value detector for detecting a peak value of a signal output from the sensor; A first amplifier for amplifying the magnitude of the signal detected by the peak value detector to a predetermined magnitude; A first comparison circuit configured to generate a pulse by comparing a signal output from the first amplifier with a reference value having a predetermined magnitude; And an output stabilization circuit for detecting a signal output to the first comparison circuit and stabilizing the output signal when a deviation occurs. The output stabilization circuit may include: a zero comparison circuit configured to determine whether the detected signal is shifted up or down with respect to a reference voltage and to adjust the corresponding output signal up or down; A second comparison circuit for determining from the detected signal by comparing with a predetermined value whether or not the vehicle is stationary on a sensor; A pulse generator for generating pulses of a predetermined period according to the comparison result of the second comparison circuit; A flip-flop for changing a state of an output of a pulse generated in the pulse generator according to the output result to the non-conductor; A resistance network for adjusting an amount of current to be supplied to the sensor according to a pulse supplied from the flip-flop; And a second amplifier for amplifying a current to be supplied to the sensor according to an amplification ratio determined in the resistance network. A solar cell module including a plurality of solar cells for converting solar energy into electrical energy; A storage battery charging electric energy generated by the solar cell module; A charge controller that prevents overdischarge and overcharge of electrical energy supplied from the solar cell module to the storage battery and selectively controls the output of the electrical energy supplied from the storage battery 130 and the solar cell module 120; And And an inverter for converting the DC voltage output from the charge controller into an AC voltage to supply the voltage stabilization circuit.