JPH06232790A - Data transmitter - Google Patents

Abstract

PURPOSE:To obtain a small sized and high performance data transmitter by which a load arranged at a remote location is controlled and supervised. CONSTITUTION:A load monitor control section 2 is provided for a load 3 and the transmitter is provided with a central processing section 1 sending a radio signal to the load monitor control section 2. Each load monitor control section 2 controls the load 3 in response to an information transmission signal including an address signal and a control signal and sends a radio signal using the operating state of the load 3 as data. The central processing section 1 receives the data radio signal and processes the data and sends a radio information transmission signal to an optional load supervisory control section 2. Furthermore, each load monitor control section 2 sends the information transmission signal up to the load monitor control section 2 corresponding to the address signal via the adjacent load monitor control section 2 sequentially and sends data of the load monitor control section 2 corresponding to the address signal to the central processing section 1 via adjacent load monitor control sections 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device for controlling a plurality of loads arranged one-dimensionally and for monitoring / measuring an operating state.

[0002]

2. Description of the Related Art A conventional data transmission device will be described with reference to FIG. This data transmission device, as shown in FIG.
It is composed of a plurality of loads 3'provided on the distribution line 4 ', a plurality of slave stations 2'provided on the load 3', and a master station 1'provided on the distribution line 4 '.

The master station 1'includes a coupling means 1a ', a transmission / reception means 1b', and a code conversion means 1c ', and the code conversion means 1c' provides parallel-serial codes for necessary information for controlling the load 3 '. The signal is converted, modulated and amplified by a high frequency by the transmitting and receiving means 1b ', and injected as an information signal into the distribution line 4'through the coupling means 1a'. The slave station 2'includes a coupling means 2a ', a transmitting / receiving means 2b', a code converting means 2c ', and a control / monitoring means 2d', and couples the information signal from the master station 1'injected into the distribution line 4 '. Transmission / reception means 2 extracted by means 2a '
In addition to b ', the transmitting / receiving means 2b' extracts only a predetermined high frequency component, demodulates it and adds it to the code converting means 2c '. Then, the code conversion means 2c 'performs code conversion of the demodulated high frequency component from the transmission / reception means 2b' into the information from the master station 1'and adds it to the control / monitor means 2d ', and the control / monitor means 2
d'controls the load 3'based on this information.

When transmitting the controlled operating state of the load 3'to the master station 1'as information, the control / monitoring means 2d 'of the slave station 2'monitors the operating state of the load, and this operation is performed. The state is added as information to the code converting means 2c '. The code converting means 2c 'performs parallel-serial code conversion of this information, modulates / amplifies it with a high frequency by the transmitting / receiving means 2b', and injects it as an information signal into the distribution line 4'through the coupling means 2a '.
Similarly to the slave station 2 ', the master station 1'extracts the information signal from the slave station 2'injected into the distribution line 4'with the coupling means 1a', and the transmitting / receiving means 1b 'with a predetermined high frequency line segment. Only the signal is extracted and demodulated, the code is converted by the code conversion means 1c 'to obtain the information from the slave station 2', and the operating state of the load 3'is monitored. Also, in this data transmission device, a master station 1'calls an arbitrary slave station 2'of a plurality of slave stations 2 ', and the slave station 2'also calls the master station 1'to transmit information signals to each other. Is used.

[0005]

In this conventional data transmission device, the attenuation amount of the information signal is 20 to 40 dB when the line length of the distribution line is 100 to 130 m, and the attenuation amount is 1 km when the line length is 1 km. Is 160 to 400 dB.
Therefore, the transmission and reception of the information signal between the remote station 2'and the remote place far from the master station 1'requires a large device especially in the transmission, and the radio signal cannot be realized due to the radio wave control law and economy. There was a problem.

For this reason, conventionally, the master station 1'and the slave station 2'are radially connected by a dedicated communication line to constantly transmit information signals periodically to control and monitor the load 3 '. Means of doing so are used. However, this means has a problem that a communication line is required between each slave station 2'and the master station 1 ', the wiring work becomes complicated, and the cost becomes high.

Therefore, an object of the present invention is to provide a small-sized and high-performance data transmission device capable of controlling and monitoring a load placed in a remote place.

[0008]

According to another aspect of the present invention, there is provided a data transmission device, wherein a plurality of load monitoring control units are provided for each of a plurality of loads which are one-dimensionally arranged, and the load monitoring control units wirelessly communicate with the plurality of load monitoring control units. A central processing unit that performs signal transmission by signals is provided. The plurality of load monitoring control units control the load in accordance with the information transmission signal including the address signal and the control signal, and also transmit the operating state of the load as data by radio signal. Further, the central processing unit receives a wireless signal of data, performs data processing, and transmits an information transmission signal to an arbitrary load monitoring control unit as a wireless signal. In addition, each of the load monitoring control units sequentially transmits the information transmission signal to the load monitoring control unit corresponding to the address signal of the information transmission signal via the adjacent load monitoring control unit, and also performs the load monitoring control corresponding to the address signal. The data of each unit is sequentially transmitted to the central processing unit via the adjacent load monitoring control unit.

According to a second aspect of the present invention, in the data transmission apparatus according to the first aspect, the central processing unit and the load monitoring control unit transmit an information transmission signal or data to an adjacent load monitoring control unit. If an information transmission signal or data is not transmitted as a wireless signal from an adjacent load monitoring control unit even after a certain period of time, it is judged as abnormal, and the load monitoring control unit judged to be abnormal is skipped and one more It is configured to transmit an information transmission signal or data to the above load monitoring control unit.

[0010]

According to the data transmission device of the first aspect, the central processing unit transmits an information transmission signal to an arbitrary load monitoring control unit by a radio signal. Then, when the load monitoring control unit receives the information transmission signal transmitted by the radio signal and the address signal included in the information transmission signal is the address signal corresponding to the address of the load monitoring control unit, the load monitoring control unit The control unit controls the load based on the control signal included in the information transmission signal, and transmits the operating state of the load as data by a radio signal.

On the other hand, when the address signal included in the information transmission signal is an address signal which does not correspond to the address of the load monitoring control unit, the load monitoring control unit further transmits the information transmission signal to the adjacent load monitoring control unit. . Therefore, the information transmission signal transmitted by the wireless signal from the central processing unit is sequentially transmitted via the load monitoring control unit to the load monitoring control unit of the address corresponding to the address signal included in the information transmission signal. Become.

Further, the data transmitted by the radio signal from the load monitoring control unit of the address corresponding to the address signal included in the information transmission signal is transmitted via the load monitoring control unit of the central processing unit of the load monitoring control unit. The data is sequentially transmitted to the central processing unit. Therefore, each load monitoring control unit sequentially relays and transmits the information transmission signal to an arbitrary load monitoring control unit at an address corresponding to the address signal of the information transmission signal, and the load monitoring control unit transmits data to the central processing unit. It will be sequentially relayed and transmitted. As a result, the distance for transmitting the information transmission signal and the data of the central processing unit and the load monitoring control unit becomes a short distance to the adjacent load monitoring control unit, and the attenuation rate becomes small.

According to the data transmission device of claim 2,
The central monitoring control unit and the load monitoring control unit do not transmit the information transmission signal or the data by the wireless signal from the adjacent load monitoring control units even if a certain time has elapsed after transmitting the information transmission signal or the data by the wireless signal. At this time, the adjacent load monitoring control unit is determined to be abnormal, the load monitoring control unit determined to be abnormal is skipped, and an information transmission signal or data is further transmitted to the next load monitoring control unit. As a result, even if any of the load monitoring control units arranged from the central processing unit to any load monitoring control unit fails,
The information transmission signal is reliably transmitted to an arbitrary load monitoring control unit, and the data is also reliably transmitted to the central monitoring control unit.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the data transmission apparatus of the present invention will be described with reference to FIGS. This data transmission device is used, for example, in a road lighting device of a highway, and is shown in FIG.
As shown in FIG. 2, a plurality of loads 3 each including a lighting device connected to the distribution line 4, a load monitoring control unit 2 provided in each of the loads 3, and a central unit provided at a delivery electric station of the distribution line 4 The processing unit 1 controls the turning on / off of the load 3 and dimming control, and also monitors the operating state of the load 3 such as current or power flowing through the load 3, insulation deterioration, and burnout.

The central processing unit 1 comprises a transmitting / receiving antenna 1a, a transmitting / receiving means 1b and a central processing means 1c. As shown in FIG. 2, the load monitoring control unit 2 uses the transmission / reception antenna 2
a, a transmitting / receiving means 2b, a signal discriminating means 2c, a control / monitoring means 2d, and a data processing means 2e, each of which has an individual address. The plurality of loads 3 are one-dimensionally arranged on the distribution line 4 at intervals of 30 m, for example. 5 is a distribution line 4
The transformer provided at 7 and the breaker 7 are shown.

In this data transmission apparatus, the central processing means 1c of the central processing unit 1 is provided with a first address code A ₁ , a second address code A ₂ , a reception completion code B and a control signal as shown in FIG. The information frame E including the code C and the parity D is added to the transmitting / receiving means 1b as the information transmission signal S. The first address code A ₁ is the information transmission signal S
Address signal corresponding to the address of the load monitoring control unit 2 of the other party, in this case, as shown in FIG. 3, the address signal corresponding to the address of the load monitoring control unit 2 (a ₁ ) adjacent to the central processing unit 1. Has been entered. An address signal corresponding to an address of an arbitrary load monitoring controller 2 (a _n ) provided in an arbitrary load 3 to be controlled is input to the second address code A ₂ .

The reception completion code B is the load monitoring control unit 2 of the address corresponding to the _first address code A ₁ to be transmitted.
Is an area for inputting a reception signal indicating that the reception of the information transmission signal S has been completed. Control signal code C
Is input with a control signal for performing control such as turning on / off of the load 3 and dimming control. The parity D is a code code created from the checksum values of the above-mentioned codes A ₁ , A ₂ , B, and C, and is used as a control signal for confirming whether transmission / reception is normally performed. These signals are analog-digital converted and input as the information transmission signal S.

The transmitting / receiving means 1b modulates / amplifies this information transmission signal S with a high frequency to transmit / receive antenna 1
It is radiated as a radio signal (radio wave) in the air via a. The load monitoring control unit 2 receives the information transmission signal S radiated in the air as a radio signal by the transmission / reception antenna 2a, adds it to the transmission / reception unit 2b, and demodulates it by the transmission / reception unit 2b to determine the signal determination unit 2
Add to c. The signal determining means 2c determines whether the address signal of the _first address code A ₁ included in the information transmission signal S corresponds to its own address. When it is determined that the address signal of the first address code A ₁ does not correspond to its own address, the signal discriminating means 2
c stops the processing and enters the standby state. Therefore, only the load monitoring controller 2 (a ₁ ) adjacent to the central processing unit 1 corresponding to the address signal of the first address code A ₁ maintains the reception state.

Then, the load monitoring control unit 2 (a ₁ ) which has maintained the reception state determines whether or not the address signal of the _second address code A ₂ corresponds to its own address by the signal discriminating means 2c. To do. At this time, the second address signal of the address code A _2, since the address signal of an arbitrary load monitoring control unit 2 (a _n) is input, a second address code A ₂ corresponding to its own address If not, the information transmission signal S is sent to the data processing means 2e.
Add to.

The data processing means 2e is a signal discriminating means 2c.
When the information transmission signal S is input from the first address code
De A₁Address signal of the second address code A₂of
Adjacent to the load monitoring control unit 2 side corresponding to the address signal
Address signal of load monitoring control unit 2, that is, central processing unit
The load monitoring control unit 2 which is the first place lower than the first place
(A ₂) Is replaced with the address signal corresponding to the address of
Furthermore, if the information transmission signal S is received in the reception completion code B,
A reception completion signal indicating and is input. At this time, replaced
The address signal and reception completion signal are
Have been converted. Then, the information transmission signal S is transmitted and received.
In addition to receiving means 2b, transmitting / receiving means 2b modulates with high frequency
・ Amplified and wireless signal in the air via the transmitting / receiving antenna 2a
Radiates as.

Then, similarly to the above, each load monitoring controller
2 extracts this information transmission signal S from the radio signal in the air,
Load monitoring control unit 2 (a₁) Adjacent to the load monitoring control unit 2
(A ₂) Only keeps the reception state,
Address code A of 1₁No. 1 of the address signal of
Replace with the address signal of the lower-level load monitoring controller 2 and receive
Input the reception completion signal to the transmission completion code B to transmit information
The signal S is radiated in the air as a radio signal. Therefore each
The load monitoring controller 2 controls the first monitor included in the information transmission signal S.
Address code A₁Address signals of the central processing unit 1
Address of the load monitoring controller 2 adjacent to the lower side of the
Signal and replace the information transmission signal S with an arbitrary load monitoring controller
2 (a_n) Will be sequentially relayed and transmitted.

Next, when the information transmission signal S is transmitted to the arbitrary load monitoring control unit 2 (a _n ), the arbitrary load monitoring control unit 2 (a _n ) performs the signal discrimination means 2c in the same manner as described above.
Then, it is determined whether the first address code A ₁ and the second address code A ₂ of the information transmission signal S correspond to their own addresses. When it is determined that the first and second address codes A ₁ and A ₂ both correspond to their own addresses, the signal discriminating means 2c adds the information transmission signal S to the control / monitoring means 2d.

The control / monitor means 2d controls the load 3 based on the control signal of the control signal code C included in the information transmission signal S, monitors the operation of the load 3 and processes the monitoring result as data. Add to means 2e. Data processing means 2e
Inputs the monitoring result, performs analog-to-digital conversion, and adds the monitoring result data to the control signal code C of the information transmission signal S.

Further, the data processing means 2e outputs the address signal of the first address code A ₁ of the information transmission signal S,
The address signal of the adjacent load monitoring control unit 2 on the side of the central processing unit 1, that is, the address signal corresponding to the address of the load monitoring control unit 2 (a _n-1 ) which is one rank higher than the central processing unit 1 At the same time as the replacement, the address signal of the second address code A ₂ is replaced with the address signal corresponding to the address of the central processing unit 1. Furthermore, reception completion code B
A reception completion signal indicating that the reception of the information transmission signal is completed is input to.

Then, the data processing means 2e radiates this information transmission signal S as data S _{D in} the air as a radio signal via the transmission / reception means 2b and the transmission / reception antenna 2a in the same manner as described above. Here, the operation state of the load 3 is monitored by monitoring the current or the power flowing through the load 3, insulation deterioration, bulb burnout, or the like. In this case, monitoring the insulation deterioration is
An insulation deterioration detector (not shown) is provided on the load 3, and the distribution line 4
A zero-phase current transformer (not shown) is inserted in the connection line connected to the load 3 to monitor the value of the low-frequency current detected by the insulation deterioration detector. For the ball out, a current transformer (not shown) is provided in the load 3 to detect the current flowing through the load 3 to monitor the presence or absence of the ball out. Moreover, the dimming state of the load 3 is also the load 3
It is monitored from the current flowing through.

As in the case of the transmission of the information transmission signal S, the load monitoring control unit 2 (a _n-1 ) on the upper side of the arbitrary load monitoring control unit 2 (a _n ) is placed in the air. and the extracted data S _D from the radio signal, the first data S _D
The address code A ₁ of the above is replaced with the address signal corresponding to the address of the load monitor control unit 2 adjacent to the upper one place, the reception completion signal is input to the reception completion code B, and the data S _D is transmitted as a radio signal in the air. And is transmitted to the adjacent load monitoring control unit 2 on the upper side.

Then, the load monitoring control unit 2 which is higher by only the first place operates in the same manner to radiate the data S _D into the air as a radio signal, and further transmits it to the adjacent load monitoring control unit 2 on the upper side. Therefore, each load monitoring control unit 2 uses the data S
_The data S _D is relayed and the data S _D is sequentially transmitted to the central processing unit 1 via the adjacent load monitoring control unit 2 on the upper side.

The central processing unit 1 extracts the data S _D radiated in the air as a radio signal from the load monitoring control unit 2 (a _n ) adjacent to the central processing unit 1 from the air via the transmitting / receiving antenna 1a, The transmission / reception means 1b demodulates the data, adds it to the central processing means 1c, and the central processing means 1c processes the data S _D to monitor the operating state of the arbitrary load 3.

As described above, this data transmission apparatus sequentially transmits the information transmission signal S radiated as a radio signal in the air from the central processing unit 1 to each load monitoring control unit 2 via each load monitoring control unit 2. Thus, the load 3 can be controlled and the data S _D of the operating state of the load 3 can be sequentially transmitted to the central processing unit 1 via each load monitoring control unit 2.

Therefore, the transmission distance of the information transmission signal S and the data S _D of the central processing unit 1 and each load monitoring control unit 2 can be shortened, and the power for transmitting the information transmission signal S and the data S _D can be supplied. It can be reduced and noise can be reduced. As a result, it is possible to control and monitor the load 3 arranged at a remote place without a cord, and further to downsize the device.

Next, the second embodiment of the data transmission apparatus of the present invention
An example will be described. In this data transmission device, the central processing unit 1 and the load monitoring control unit 2 of the data transmission device of the first embodiment respectively transmit the information transmission signal S or the data S _D to the adjacent load monitoring control unit 2 and then When the information transmission signal S or the data S _D is not radiated into the air as a radio signal from the adjacent load monitoring control unit 2 even after a predetermined time elapses, the load monitoring control unit 2 determines that the load is abnormal, and determines that this is abnormal. The load monitoring control unit 2 is skipped and the information transmission signal S or the data S _D is further transmitted to the next load monitoring control unit 2.

The central processing unit 1 is similar to the first embodiment in that
The information transmission signal S in which the address signal of the load monitoring control unit 2 (a ₁ ) adjacent to the central processing unit 1 is input to the first address code A ₁ is radiated as a radio signal in the air to be in a reception state. Then, when the reception code B to which the reception completion signal is input is radiated in the air as a wireless signal within a predetermined time from the load monitoring control unit 2 (a ₁ ), that is, the information transmission signal S is in the air as a wireless signal. When emitted, the central processing unit 1 determines that the adjacent load monitoring control unit 2 (a ₁ ) is normal, and holds the reception state as it is.

On the other hand, when the reception completion code B to which the reception completion signal is input within a predetermined time from the load monitoring controller 2 (a ₁ ) is not radiated into the air, that is, when the information transmission signal S is not radiated into the air, The processing unit 1 determines that the load monitoring control unit 2 (a ₁ ) is abnormal. Then, the address signal of the first address code A ₁ of the information transmission signal S is sent to the address of the load monitoring control unit 2 (a ₂ ) which is one order lower than the load monitoring control unit 2 (a ₁ ) that is determined to be abnormal. The corresponding address signal is replaced and the information transmission signal S is radiated again in the air as a radio signal. As a result, the load monitoring control unit 2 adjacent to the central processing unit 1 and determined to be abnormal is
(A ₁ ) is skipped, and the information transmission signal S is sent to the load monitoring control unit 2 (a ₂ ) that is one step ahead of this load monitoring control unit 2.
Is transmitted.

The load monitoring control unit 2 is also similar to the central processing unit 1.
Information transmission signal S or data S _DA radio signal in the air
And then receive it from the adjacent load monitoring control unit 2.
The reception completion code B that has received the reception completion signal is emitted in the air.
When there is no information transmission signal S or data S_D
Is not radiated into the air, this adjacent load monitoring system
The control unit 2 is judged to be abnormal, and the information transmission signal S or data S
_DFirst address code A₁Address signal
The load monitoring control unit 2 which is judged to be always one more ahead of the load monitoring
Replace with address signal corresponding to the address of visual control unit 2
And again the information transmission signal S or data S_DWireless in the air
Emit as a signal.

When the information transmission signal S is transmitted, the load monitoring control unit 2 on the lower side of the central processing unit 1 is transmitted, and when the data S _D is transmitted, the upper side of the central processing unit 1 is transmitted. The load monitoring controller 2 is caused to skip. Therefore, even if one of the load monitoring control units 2 fails, the information transmission signal S can be reliably transmitted to any load monitoring control unit, and the data S _D can be transmitted to the central processing unit 1. it can.

Further, in the data transmission device of the first and second embodiments, since the load 3 is used for the road lighting device arranged at intervals of 30 m, the arrangement interval of the load monitoring controller 2 is within 100 m. Therefore, the power for transmitting the information transmission signal S and the data S _D can be made extremely small, and the device can be made smaller. Although the data transmission devices of the first and second embodiments are used for the road lighting device to monitor the control and operating state of each lighting device, the data transmission device is not limited to the road lighting device.

[0037]

According to the data transmission device of the first aspect of the present invention, a load monitoring control unit for controlling the load according to the information transmission signal and radiating the operating state of the load as data in the air as a radio signal is provided to each load. A central monitoring control unit is provided, which extracts data from the wireless signal in the air and performs data processing, and radiates an information transmission signal to an arbitrary load monitoring control unit as a wireless signal in the air. The information transmission signal is sequentially transmitted to the arbitrary load monitoring control unit corresponding to the address signal included in the via the adjacent load monitoring control unit, and the data is transmitted via the adjacent load monitoring control unit on the central processing unit side. Since it is configured to sequentially transmit to the central processing unit, it is possible to sequentially transmit information transmission signals to the load monitoring control units located at remote locations via each load monitoring control unit. And the data can also be sequentially transmitted via the respective load monitoring control unit to the central processing unit.

Therefore, the transmission distance of the information transmission signal and data of the central processing unit and each load monitoring control unit can be shortened, the power for transmitting the information transmission signal and data can be reduced, and noise can be reduced. Can be made smaller. As a result, it is possible to control and monitor a load placed in a remote place, and to provide a small-sized and high-performance device.

According to another aspect of the data transmission device of the present invention, when the central supervisory control unit and the load supervisory control unit do not radiate the information transmission signal or data from the adjacent load supervisory control units to the air even after a certain period of time elapses, Since the adjacent load monitoring control unit is judged to be abnormal and the information transmission signal or data is further transmitted to the next load monitoring control unit,
Even if any of the load monitoring control units fails, the information transmission signal can be reliably transmitted to any load monitoring control unit, and data can be transmitted to the central monitoring control unit. As a result, even if the load monitoring control unit fails,
It is possible to reliably control each load, and the central monitoring control unit can monitor the operating state of each load.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a data transmission device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a load monitoring control unit in FIG.

3 is a block diagram showing a series of operations of the data transmission device of FIG. 1. FIG.

FIG. 4 is a schematic diagram showing a configuration of an information transmission signal of FIG.

FIG. 5 is a block diagram of a conventional data transmission device.

[Explanation of symbols]

 1 Central processing unit 2 Load monitoring control unit 3 Load 4 Distribution line

Claims (2)

[Claims] 1. A plurality of loads arranged in a one-dimensional manner and a load provided in each of the loads to control the load according to an information transmission signal including an address signal and a control signal, and to determine an operating state of the load. A plurality of load monitoring control units that transmit a wireless signal as data, and a wireless signal of the data is received to perform data processing, and the information transmission signal to an arbitrary load monitoring control unit is transmitted as a wireless signal. A central processing unit, and each of the load monitoring control units sequentially transmits the information transmission signal to a load monitoring control unit corresponding to the address signal of the information transmission signal via an adjacent load monitoring control unit. So as to sequentially transmit the data of the load monitoring control unit corresponding to the address signal to the central processing unit via the adjacent load monitoring control unit. Configured data transmission device. 2. The central processing unit and the load monitoring control unit are controlled by the adjacent load monitoring control unit even if a certain time has elapsed after transmitting the information transmission signal or data to the adjacent load monitoring control unit. When the information transmission signal or data is not transmitted as a radio signal, it is determined to be abnormal, and the load monitoring control unit determined to be abnormal is skipped to the next load monitoring control unit. The data transmission device according to claim 1, wherein the data transmission device is configured to transmit the data.