JP3518161B2 - Data communication device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a data communication device,
In particular, the present invention relates to a communication device for transmitting data between a moving body traveling on a fixed route and a control device on the ground.

[0002]

2. Description of the Related Art Conventionally, as a method for performing communication between a ground and a moving body, an antenna connected to a transmitting / receiving device on the ground is installed along a fixed route of the moving body, and the transmitting / receiving device of the moving body is mounted on the moving body. There is known a method of providing an antenna connected to the antenna and performing wireless communication using these antennas.

[0003]

However, in the case of supplying power to a moving body without contact, that is, by laying an induction line to which a high-frequency current is supplied along a fixed path of the moving body and facing the moving line to the moving body. When a coil is provided with a coil and electric power is supplied by an electromotive force induced in the coil, the antenna sometimes receives noise due to the interference of the magnetic field generated by the induction line, resulting in incomplete data transfer.

As a means for solving such a problem, a communication device using light which is not affected by the magnetic flux of the guide line is conceivable. However, dust generated by the traveling of the moving body emits light or receives light. Sometimes the department stopped working.

Therefore, an object of the present invention is to provide a data communication device using magnetism that is not easily affected by other magnetic fields and is resistant to dust.

[0006]

In order to achieve the above-mentioned object, a data communication device according to a first aspect of the present invention is provided with an outer shell member made of a cylindrical magnetic member and vertically from the center of the bottom surface of the outer shell member. And a transmitting section including a core made of an inner member made of a columnar magnetic member, and a coil having a plurality of turns wound along the circumference of the inner member of the core,
A data transmission is provided by including a receiving unit composed of the core and a magnetic sensor arranged at a tip of an internal member of the core, applying a signal to the coil, and detecting the signal by the magnetic sensor. It is characterized by performing.

Here, the magnetic sensor is formed by a Hall element, a magnetic resistance element, or the like. The signal applied to the coil is a carrier-modulated AC signal or a carrier-unmodulated baseband signal.

With the above structure, a signal according to the transmitted data is output to the coil of the transmitter, and the magnetic flux generated by this coil is detected by the magnetic sensor of the opposite receiver, and the data is transmitted.

According to a second aspect of the present invention, there is provided a data communication device including a core formed of a cylindrical magnetic member, an inner member formed of a columnar magnetic member provided in a central portion of the outer member, and a core of the core. A transmitter / receiver composed of a coil of a plurality of turns wound along the circumference of the inner member and a magnetic sensor arranged at the tip of the inner member of the core is provided, and a signal is applied to the coil, Data is transmitted by detecting this signal with a magnetic sensor.

Here, the magnetic sensor is formed by a Hall element, a magnetic resistance element, or the like. The signal applied to the coil is a carrier-modulated AC signal or a carrier-unmodulated baseband signal.

With the above structure, a signal according to the transmitted data is output to the coil of the transmitter, and the magnetic flux generated by this coil is detected by the magnetic sensor of the opposing receiver, and the data is transmitted.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a data communication device according to an embodiment.

Reference numeral 1 denotes a transmitter, and as shown in FIG. 2, an outer shell member 2 made of ferrite, which is a cylindrical magnetic member,
And a core 4 made of a cylindrical ferrite inner member 3 provided vertically from the center of the bottom surface of the outer member 2, and a plurality of turns of litz wire wound along the circumference of the inner member 3 of the core 4. The coil 5 is composed of The diameter of the outer shell member 2 is set apart from the coil 5 (with a space provided).

Reference numeral 6 is a receiver, which is composed of the core 4 and a magnetic sensor 7 which is arranged at the tip of the internal member 3 of the core 4 and which is composed of a Hall element or a magnetic resistance element.

Data transmission / reception is performed with the transmitter 1 and the receiver 6 facing each other. The coil 5 is connected to the transmitter 11, the magnetic sensor 7 is connected to the receiver 12, and the transmitter 1, receiver 6, transmitter 11, and receiver 12 form a data communication device A. . This data communication device A
Can be transmitted / received by, for example, arranging on the ground side and the moving body side, respectively.

When the transmitter 11 inputs digital transmission data, as shown in FIG. 3, when the data is "1" (high level), it outputs a predetermined high-frequency transmission signal to the coil 5 and the receiver 5 receives it. When the reception signal of a predetermined high frequency is input from the magnetic sensor 7, the reference numeral 12 outputs a digital signal which makes the output during that time "1" (high level). These transmitters 11
And the receiver 12 are connected to the controller 13.

With the above-described structure, a transmission signal of a predetermined high frequency is output from the transmitter 11 to the coil 5 of the transmitter 1 in accordance with the transmission data output from the controller 13, and the magnetic flux generated by this coil 5 causes the opposing data. The predetermined high-frequency reception signal detected by the magnetic sensor 7 of the receiving unit 6 of the communication device A is output to the receiver 12, converted into digital data, and output to the controller 13.

As described above, the data communication is possible, and the outer shell member 2 of the core 4 facing each other forms the magnetic path x as shown in FIG. The magnetic field can be prevented from leaking from the transmitting unit 1 and the receiving unit 6, and at the same time, it can be made less susceptible to the influence of other external magnetic fields, and clear data can be transmitted without interference. Further, the magnetic sensor 7 is arranged at the position where the magnetic flux density is the largest, so that the current flowing to the coil 5 can be reduced, signals can be exchanged with a small current, and the transmitter 1 and the receiver 6 can be exchanged. Data can be transmitted even if the facing distance L is large. Further, since the outer member 2 is set to have a large diameter apart from the inner member 3 around which the coil 5 is wound (a space is provided), the magnetic field of the transmitter 1 can be widened, and thus the transmitter 1 and Data can be transmitted even if the position of the receiving unit 6 is displaced. Further, since it is not easily affected by dust, it can be used for a device such as a moving body that easily generates dust. Further, since the transmitter 1 and the receiver 6 are separately provided, the transmission and the reception can be performed at the same time, and the data transmission time can be shortened. Further, by using a litz wire for the coil 5, it is possible to pass a high frequency current, and it is possible to transmit data even when a distance between the transmitter 1 and the receiver 6 is required. It is possible to reduce the amount of current flowing to 5.

Although the transmitter 1 and the receiver 6 are separately provided in the above embodiment, as shown in FIGS.
It is also possible to form the transmitter / receiver 21 by using one core 4.

As shown in FIG. 5, the transmitter / receiver 21 includes a core 4
A coil 5 composed of a plurality of turns of litz wire wound around the inner member 3 of the core 4, and a magnetic element composed of a Hall element or a magnetoresistive element arranged at the tip of the inner member 3 of the core 4. It is composed of a sensor 7. Data transmission / reception is performed with the transmission / reception unit 21 facing each other as shown in FIG. The data communication device A ′ includes a transmitter / receiver 21 and a transmitter 11
And receiver 12.

According to the above configuration, like the above-described embodiment (FIG. 1), there is no magnetic field leakage, is less susceptible to other external magnetic fields, and clear data can be transmitted without interference. In addition, since the mounting space of the transmitting / receiving unit 1 is halved, it is effective for a device such as a moving body having a limited mounting space. However, since it is difficult to perform data transmission from both directions at the same time, it is necessary to form a certain rule for data transmission.

Although the litz wire is used for the coil 5 in the above embodiment, a copper wire may be used. Further, in the above-described embodiment, the outer shell member 2 has a cylindrical shape,
Although the inner member 3 is formed in a cylindrical shape, as shown in FIG. 6, the outer member 2 has another cylindrical shape such as a box shape, and the inner member 3 has another columnar shape such as a square shape. You can also

In the above embodiment, the data "
1 "" 0 "corresponds to the presence / absence of a high-frequency current signal, but since the magnetic sensor 7 can detect a DC magnetic field, the presence / absence of a DC current for" 1 "" 0 "of data, or ( It is also possible to correspond to (+) and (-) (baseband transmission is also possible).
The modulation circuit and the demodulation circuit of 2 are unnecessary, and the circuit can be simplified.

[0024]

As described above, according to the first aspect of the present invention, data communication is possible, and a magnetic path is formed by the outer shell members of the opposing cores, so that the space between the cores is reduced. The magnetic field can be prevented from leaking from these transmitters and receivers by being closed, and at the same time, it can be made less susceptible to the influence of other magnetic fields, and clear data without interference can be transmitted. Further, by arranging the magnetic sensor at the position where the magnetic flux density is the largest, it is possible to reduce the current flowing to the coil, and it is possible to exchange signals with a small current. In addition, the magnetic field of the transmitter can be widened by setting the diameter of the outer member large (spaced) apart from the inner member around which the coil is wound, so that the positions of the transmitter and receiver are misaligned. However, the data can be transmitted. Further, since it is not easily affected by dust, it can be used for a device such as a moving body that easily generates dust. Furthermore, since the transmitter and the receiver are separately provided, transmission and reception can be performed at the same time, and the data transmission time can be shortened.

According to the second aspect of the present invention, the data communication is possible, and the magnetic path is formed by the outer shell members of the opposing cores, thereby closing the space between the two cores. The magnetic field can be prevented from leaking from the receiving section, and at the same time, it can be made less susceptible to the influence of other magnetic fields, and clear data without interference can be transmitted. Further, by arranging the magnetic sensor at the position where the magnetic flux density is the largest, it is possible to reduce the current flowing to the coil, and it is possible to exchange signals with a small current. In addition, the magnetic field of the transmitter can be widened by setting the diameter of the outer member large (spaced) apart from the inner member around which the coil is wound, so that the positions of the transmitter and receiver are misaligned. However, the data can be transmitted. Further, since it is not easily affected by dust, it can be used for a device such as a moving body that easily generates dust. Furthermore, since the installation space for the transmitter / receiver is halved, it is effective for devices with limited installation space such as mobile units.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a data communication device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a transmitter and a receiver of the data communication device.

FIG. 3 is a characteristic diagram of transmission / reception data of the data communication device.

FIG. 4 is a configuration diagram of a data communication device according to another embodiment of the present invention.

FIG. 5 is a perspective view of a transmission / reception unit of the data communication device.

FIG. 6 is a perspective view of a core of a data communication device according to another embodiment of the present invention.

[Explanation of symbols]

A, A'data communication device x magnetic path 1 transmitter 2 Outer member 3 internal members 4 core 5 coils 6 Receiver 7 Magnetic sensor 11 transmitter 12 receiver 21 Transmitter / receiver

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Claims (2)

(57) [Claims] 1. A core comprising an outer member made of a cylindrical magnetic member and an inner member made of a columnar magnetic member provided vertically from the center of the bottom surface of the outer member, and along the circumference of the inner member of the core. The coil includes a plurality of turns of a coil wound around it and a receiver including a core and a magnetic sensor arranged at the tip of an internal member of the core. Is applied, and data is transmitted by detecting this signal by the magnetic sensor. 2. A core made of an outer member made of a cylindrical magnetic member, an inner member made of a columnar magnetic member provided at the center of the outer member, and a core wound around the inner member. A transmitter / receiver composed of a coil having a plurality of turns and a magnetic sensor arranged at the tip of the inner member of the core; applying a signal to the coil; and detecting the signal by the magnetic sensor. A data communication device, wherein data is transmitted by means of a data communication device.