JP2013019847A - Matrix type magnetic field measurement device in railway car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a matrix type magnetic field measurement device in a railway car for quickly measuring a magnetic field in the railway car and directly visualizing the state of distribution of the magnetic field by installing a magnetic field measurement apparatus on one surface and a display device on the other surface corresponding to the position of the magnetic field measurement apparatus so as to become a front/rear arrangement.SOLUTION: The matrix type magnetic field measurement device in a railway car includes the magnetic field measurement apparatus 2 and the display device 4. The magnetic field measurement apparatus 2 and the display device 4 are arranged on one and another surfaces of a common substrate 1 at positions corresponding to each other so as to become the front/rear arrangement, and output from the magnetic field measurement apparatus 2 is converted into an effective value and is analog-output to the display device 4.

Description

  The present invention relates to a matrix type railway vehicle magnetic field measuring apparatus.

Conventional magnetic field measurement in a railway vehicle is a method in which a target (water string or ruler) whose position (spatial coordinates) is known in advance is assembled with a non-magnetic material, and the magnetic field is measured point by point at that location.
In magnetic levitation railway vehicles, the shielding of magnetic fields by superconducting coils is an important issue, and it has been required to easily and quickly measure the distribution of magnetic fields (the following non-disclosures). Patent Document 1).

Takashi Ninagawa et al., “Magnetic shield test results focusing on flux flow”, Railway Technical Research Institute, Linear Drive Study Group, LD-94-042 (1994)

However, the conventional magnetic field measurement method in a railway vehicle has a problem that it is difficult to directly visualize the state of magnetic field distribution.
Further, in the conventional magnetic field measurement methods, the spatial coordinate data and the magnetic field measurement data cannot be acquired simultaneously, and it is necessary to collate the coordinate data acquired separately after measurement and the magnetic field measurement data.

There is also a problem that the reliability of the coordinate data is low.
In view of the above situation, the present invention installs the magnetic field measurement device and the display device so that the positions of the magnetic field measurement device and the display device correspond to each other. It is an object of the present invention to provide a matrix type railway vehicle magnetic field measuring apparatus that can be directly visualized.

In order to achieve the above object, the present invention provides
[1] In a matrix type railway vehicle magnetic field measuring apparatus, the apparatus includes a magnetic field measuring apparatus and a display device, and is installed so that the positions of the magnetic field measuring device and the display device correspond to the front and back of a common substrate, The output from the magnetic field measuring device is converted into an effective value and analog output is performed on the display device.

  [2] In a matrix type railway vehicle magnetic field measuring device, the magnetic field measuring device and a display device are provided, and the magnetic field measuring device and the display device are installed so that the positions of the magnetic circuit measuring device and the display device correspond to the front and back of the common board, The output from the magnetic field measuring device is converted into an effective value, AD converted by an AD converter, and the AD converted signal is stored in a microcontroller and output to the display device.

[3] The matrix type railway vehicle magnetic field measuring apparatus according to [1] or [2], wherein the output of the magnetic field measuring apparatus is scanned.
[4] The matrix type railway vehicle magnetic field measuring apparatus according to [1], [2] or [3] is characterized in that a DC magnetic field is assumed and effective value conversion is average value conversion.
[5] The matrix type magnetic field measuring apparatus for a railway vehicle according to any one of [1] to [4], wherein the magnetic field measuring apparatus includes a magnetic field measuring sensor such as a Hall element, a search coil, or a magnetoresistive element, a flux It is a gate type sensor.

  [6] The matrix type railroad vehicle magnetic field measuring apparatus according to any one of [1] to [4], wherein the display device is a display device such as an LED or an LCD.

According to the present invention, the following effects can be achieved.
(1) Magnetic field measurement in a railway vehicle can be performed quickly.
(2) Since the distribution state of the magnetic field in the railway vehicle can be directly visualized, it is possible to clearly observe a place where the magnetic flux density is high or low.

It is a perspective view which shows the surface and the back surface of the matrix-type railcar internal magnetic field measuring apparatus which shows the Example of this invention. It is a figure which shows the 1st circuit structure of the magnetic field sensor and display element in FIG. It is a figure which shows the 2nd circuit structure of the magnetic field sensor and display element in FIG. It is a figure which shows the magnetic field measurement sensor part and its peripheral circuit of the matrix type railway vehicle magnetic field measuring apparatus which show the Example of this invention. It is a figure which shows the display apparatus part and its peripheral circuit of the matrix-type railway vehicle magnetic field measuring apparatus which show the Example of this invention. It is a figure substitute image figure which shows the example of a display of the matrix system rail vehicle magnetic field measuring apparatus of the LED display apparatus which shows the Example of this invention. It is a drawing substitute image figure which shows the example of a display of the matrix type railway vehicle magnetic field measuring apparatus of the liquid crystal display device which shows the Example of this invention.

The magnetic field measuring apparatus for a matrix system railroad vehicle of the present invention includes a magnetic field measuring apparatus and a display device, and is installed so that the positions of the magnetic field measuring apparatus and the display device correspond to the front and back of a common substrate, The output from the magnetic field measuring device is converted into an effective value and output to the display device in analog form.
Further, in the magnetic field measuring apparatus for a matrix system in a railway vehicle, the magnetic field measuring apparatus and the display device are provided, and the magnetic field measuring device and the display device are arranged so as to correspond to the front and back of a common substrate. The output from the measuring device is converted into an effective value, AD converted by an AD converter, and the AD converted signal is stored in a microcontroller and output to the display device.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a perspective view showing a front surface and a back surface of a matrix type railway vehicle magnetic field measuring apparatus according to an embodiment of the present invention, and FIG. 1A is a perspective view showing a surface of the matrix type railway vehicle magnetic field measuring apparatus; FIG.1 (b) is a perspective view which shows the back surface of the magnetic field measuring apparatus in a matrix system rail vehicle.

Reference numeral 1 denotes a substrate, 2 denotes a magnetic field measuring sensor as a magnetic field measuring device arranged in a matrix on the surface of the substrate 1, and 3 denotes a part on which a power source, a semiconductor element, and the like are mounted. Reference numeral 4 denotes a display element as a display device arranged in a matrix on the back surface of the substrate 1.
FIG. 2 is a diagram showing a first circuit configuration of the magnetic field sensor and the display element in FIG. 1, and here, a connection between the single magnetic field sensor and the display element is shown. As shown in this figure, the power source 5 is connected to the magnetic field measurement sensor 2, and the magnetic field measurement sensor 2 is connected to the display element 4 via the effective value circuit 6 and the display adjustment circuit 7.

  As shown in FIG. 1, magnetic field measuring sensors 2 are arranged in a matrix on the surface of a single substrate 1, and a display element 4 such as an LED light emitting element is disposed on the back surface of the substrate 1. Install on the back of the position corresponding to. In addition to the magnetic field measurement sensor 2 and the display element 4, a power source and a semiconductor element, which will be described later, are mounted on the substrate 3 on the substrate 1. In the first circuit configuration example, the magnetic field measurement sensor 2 and the display element 4 are connected to each other by a circuit as shown in FIG. The magnetic field measuring sensor 2 outputs a voltage proportional to the magnetic flux density (which may be either an AC magnetic field or a DC magnetic field, the same applies hereinafter). This voltage is converted by the effective value circuit 6 into an effective value in the case of an AC magnetic field and to an average value in the case of a DC magnetic field. Based on the value output from the effective value circuit 6, the brightness and the like of the display element 4 is changed by the display adjustment circuit 7. The display adjustment circuit 7 has a function of obtaining power for driving the display elements 4 and adjusting unevenness such as brightness between the display elements 4. As described above, by arranging the magnetic field measurement device 2 and the display element 4 so as to be opposite to each other, the coordinate data and the magnetic field measurement data need not be collated, and the result measured by the magnetic field measurement device 2 is obtained. However, it is displayed on the display element 4 while maintaining the surface of the same position, that is, the position information. For example, if the display is set to be bright according to the magnitude of the magnetic flux density, the intensity of the magnetic flux density can be directly visualized with the brightness of the display device on the spot when the magnetic field measurement is performed by this apparatus.

FIG. 3 is a diagram showing a second circuit configuration of the magnetic field sensor and the display element in FIG. 1, and here, a connection between a single magnetic field sensor and the display element is shown.
As shown in this figure, the power source 5 can be connected to the display element 4 via the magnetic field measurement sensor 2, the AD converter 8, and the microcontroller 9.
In other words, in this embodiment, the portion that performs display with the analog output of the first circuit configuration shown in FIG. 2 is replaced with the microcontroller 9 and digitized so that data storage and display adjustment programming can be performed. It is.

  FIG. 4 and FIG. 5 are diagrams showing a magnetic field measurement sensor unit and a display unit of a matrix type railway vehicle magnetic field measurement apparatus according to an embodiment of the present invention and its peripheral circuits. In the embodiment shown in FIG. 2 or FIG. 3, the magnetic field measurement sensor and the display element are in a one-to-one relationship. However, in the embodiment shown in FIG. 4 and FIG. Has been made to sweep. With this configuration, the effective value circuits can be integrated into one, the circuit configuration is simplified, and the power consumption can be reduced.

  As shown in these drawings, the magnetic field measurement sensor and its peripheral circuit of the matrix type railway vehicle magnetic field measurement apparatus are the multiplexer 11 connected in the x-axis direction (horizontal direction) of the magnetic field measurement sensor 2, and the magnetic field measurement sensor 2. A multiplexer 12 connected in the y-axis direction (vertical direction) and a microcontroller 13 connected to the multiplexers 11 and 12 are arranged. An effective value conversion circuit 14 is connected between the multiplexer 12 and the microcontroller 13.

As shown in FIG. 5, the display unit of the matrix type railway vehicle magnetic field measuring device and its peripheral circuit are the multiplexer 15 connected in the x-axis direction (horizontal direction) of the display element 4, and the y-axis of the display element 4. A multiplexer 16 connected in the direction (vertical direction) and a microcontroller 17 connected to the multiplexers 15 and 16 are arranged.
5 consolidates the effective value conversion circuit 14 and the microcontroller 13 shown in FIG. 4 into one, and switches between the magnetic field measurement sensor 2 and the display element 4 by the multiplexers 15 and 16, and sweeps them. The above functions shown in (1) are performed.

In the embodiment of the present invention, any magnetic field measuring sensor or flux gate type sensor such as a Hall element, a search coil, or a magnetoresistive element can be applied as the magnetic field measuring apparatus.
In the embodiment of the present invention, a display device such as an LED or a liquid crystal display (LCD) can be used as the display device.
FIG. 6 is a drawing-substituting image diagram showing a display example of the matrix type railway vehicle magnetic field measuring apparatus of the LED display device showing the embodiment of the present invention.

As shown in this figure, the LED where the magnetic field is strong is displayed white (bright), and the distribution of the magnetic field is clearly displayed.
FIG. 7 is a drawing-substituting image diagram showing a display example of a matrix type railway vehicle magnetic field measuring apparatus for a liquid crystal display device according to an embodiment of the present invention.
As shown in this figure, the liquid crystal where the magnetic field is strong is displayed in white (bright), and the distribution of the magnetic field is clearly displayed.

Moreover, in the said Example, although arrangement | positioning of a magnetic field measuring apparatus or a display apparatus has shown the 8x8 matrix, it is not limited to this. Furthermore, the matrix intervals are not limited to equal intervals.
In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The matrix type railway vehicle magnetic field measuring apparatus according to the present invention quickly measures the magnetic field in the railway vehicle by installing the magnetic field measuring apparatus and the display device on the back side of the position corresponding to the magnetic field measuring apparatus. In addition, the present invention can be used as a matrix type railway vehicle magnetic field measuring apparatus capable of directly visualizing the state of magnetic field distribution.

1 Substrate 2 Magnetic field measuring device (magnetic field measuring sensor)
3 Parts where power supplies and semiconductor elements are mounted 4 Display devices (display elements)
5 Power supply 6 RMS circuit 7 Display adjustment circuit 8 AD converter 9, 13, 17 Microcontroller 11, 12, 15, 16 Multiplexer 14 RMS conversion circuit

Claims (6)

  A magnetic field measurement device and a display device are provided, and the magnetic field measurement device and the display device are arranged so that they correspond to the front and back of a common substrate, and the output from the magnetic field measurement device is converted into an effective value. A matrix type magnetic field measuring apparatus in a railway vehicle, which outputs an analog signal to the display device.   A magnetic field measurement device and a display device are provided, and the magnetic field measurement device and the display device are arranged so that they correspond to the front and back of a common substrate, and the output from the magnetic field measurement device is converted into an effective value. A matrix type magnetic field measuring apparatus for a railway vehicle, which performs AD conversion by an AD converter, accumulates the AD-converted signal in a microcontroller, and outputs the signal to the display device.   3. A matrix type railway vehicle magnetic field measuring apparatus according to claim 1 or 2, wherein the output of the magnetic field measuring apparatus is scanned.   The matrix type railway vehicle magnetic field measuring apparatus according to claim 1, 2, or 3, wherein a DC magnetic field is assumed and effective value conversion is average value conversion.   5. The matrix type magnetic field measuring apparatus for a railway vehicle according to claim 1, wherein the magnetic field measuring apparatus is a magnetic field measuring sensor such as a Hall element, a search coil, or a magnetoresistive element, or a fluxgate type sensor. Matrix-type railway vehicle magnetic field measuring apparatus characterized by the above.   5. The matrix type railway vehicle magnetic field measuring device according to claim 1, wherein the display device is a display device such as an LED or an LCD.