JP5128995B2 - Television broadcast signal transmission system and monitoring device - Google Patents

Description

  The present invention relates to a television broadcast signal transmission system including an amplification device that amplifies a television broadcast signal and a power supply device that supplies power to the amplification device, and a monitoring device suitable for constructing the system.

  Conventionally, as an amplifying device (so-called booster) that amplifies a television broadcast signal received by a receiving antenna and transmits it to a terminal side via a transmission line (coaxial cable or the like), a transmission line is connected from a power supply device provided on the terminal side. A so-called low-voltage system is known that receives power supply via a power source.

  Further, in the television broadcast signal transmission system thus configured with the amplification device and the power supply device, since the power supply device is installed in the vicinity of the television receiver, the output voltage and the output current are respectively input in the power supply device. It has been proposed to provide a detection circuit for detection, determine disconnection / short circuit on the amplification device side from these detection values, and notify the determination result by lighting of a light emitting diode (for example, Patent Document 1) reference).

On the other hand, in this type of system, since the amplifying device is installed outdoors, a photovoltaic power generation panel (so-called solar cell) is installed on the transmission line or on the amplifying device itself. It has also been proposed to supply power to an internal circuit of an amplification device in combination with a device (see, for example, Patent Document 2).
JP-A-8-214226 JP 2007-43865 A

  However, by combining the above two conventional techniques, the power supply device side determines abnormality such as disconnection / short circuit on the amplification device side based on the output voltage and output current, and the power supply voltage supplied to the amplification device is supplied from the power supply device. If it is generated using the generated power supply voltage and the generated power from the photovoltaic power generation panel, the amplifying device side breaks in the power supply device even when the amplifying device is operating normally in fine weather. There was a problem that was erroneously detected.

  In other words, since the generated power from the photovoltaic power generation panel increases during clear weather, the power supply voltage for driving the internal circuit of the amplifier can be generated only by the generated power. Since no load current flows, the power supply device side erroneously detects that a disconnection has occurred in the amplification device or the transmission line on the amplification device side, and notifies that fact.

  The present invention has been made in view of these problems. In a television broadcast signal transmission system including an amplification device that amplifies a television broadcast signal and a power supply device that supplies power to the amplification device, the amplification device includes sunlight. The purpose is to be able to supply power by using a power generation device such as a power generation panel in combination with a power supply, and to accurately detect an abnormality such as a disconnection / short circuit occurring on the amplifier side on the terminal side. And

In order to achieve the above object, according to the first aspect of the present invention, there is provided an amplifying device which operates on a transmission line for transmitting a television broadcast signal by receiving power supply from a power supply device on the terminal side of the transmission line. TV broadcast signal transmission system
On the transmission line between the amplifying device and the power supply device, the power generation means for generating power using natural energy, the power supply voltage transmitted from the power supply device, and the output from the power generation means, the amplifier. A power supply circuit that generates a power supply voltage for driving and outputs the power supply voltage to the amplifying device side is provided, and an auxiliary power supply is provided.
Based on the transmission signal transmitted from the amplifying device via the transmission line on the transmission line between the auxiliary power source and the power source device, it is determined whether or not the amplifying device is operating normally. An abnormality determining means for determining a disconnection / short circuit generated on the amplification device side using at least one of an output current and an output voltage supplied from the power supply device and output to the amplification device side when not, There is provided a monitoring device including notification means for notifying the determination result by the abnormality determination means.

  According to a second aspect of the present invention, in the television broadcast signal transmission system according to the first aspect, when the output from the power supply circuit is normal, the auxiliary power supply generates a notification signal indicating that effect. The notification signal output means for sending the generated notification signal to the terminal side via the transmission line is provided, and the abnormality determination means of the monitoring device transmits the notification signal from the auxiliary power supply. Determining that the amplification device is operating normally, and determining that an abnormality has occurred on the amplification device side when the notification signal is not transmitted, and determining the disconnection / short circuit. It is characterized by.

  According to a third aspect of the present invention, in the television broadcast signal transmission system according to the first aspect, the monitoring device has a signal level of a television broadcast signal transmitted from the amplifier through a transmission line. Signal level detection means for detecting is provided, and the abnormality determination means determines that the amplification device is operating normally when the signal level detected by the signal level detection means is higher than the abnormality determination level. If the signal level detected by the signal level detection means is equal to or lower than the abnormality determination level, it is determined that an abnormality has occurred on the amplification device side, and the disconnection / short circuit is determined.

  Next, according to a fourth aspect of the present invention, in the television broadcast signal transmission system according to any one of the first to third aspects, the abnormality determining means in the monitoring device is such that the amplification device is operating normally. Is determined based on the output current to the amplifying apparatus side transmission line, the operating state of the power generation means is determined, and the determination result is notified to the notification means.

  Further, the invention according to claim 5 is the television broadcast signal transmission system according to any one of claims 1 to 3, wherein the power supply voltage output path to the amplifying apparatus side transmission line in the monitoring apparatus is on the output path. Is provided with a diode for preventing backflow, and when the abnormality determining means determines that the amplification device is operating normally, the operation of the power generating means is based on the potential difference between both ends of the diode for preventing backflow. The state is determined, and the determination result is notified to the notification means.

According to a sixth aspect of the present invention, there is provided a television broadcast signal transmission system in which an amplifier that operates by receiving power supply from a power supply device on the terminal side of the transmission line is provided on a transmission line for transmitting a television broadcast signal. ,
On the transmission line between the amplifying device and the power supply device, an internal circuit is driven by using a power generation means for generating power using natural energy, a power supply voltage supplied from the power supply device, and an output from the power generation means. A power supply circuit for generating and supplying a power supply voltage to an internal circuit and a transmission path for sending the amplified television broadcast signal to a transmission line on the terminal side. An auxiliary power source having an electrical load for passing a constant load current, and
Abnormality determination on the transmission line between the auxiliary power supply and the power supply device, based on the output current to the amplification device side transmission line, to determine the disconnection / short circuit occurring on the amplification device side and the operating state of the power generation means And a notifying means for notifying the determination result by the abnormality determining means.

  According to a seventh aspect of the present invention, in the television broadcast signal transmission system according to any one of the first to sixth aspects, the power generation means provided in the auxiliary power source is a solar that generates power by receiving sunlight. It is a photovoltaic power generation means.

On the other hand, the invention described in claim 8 is provided with an amplifying device that operates by receiving power supply from a power supply device on a terminal side of the transmission line on a transmission line for transmitting a television broadcast signal. On the transmission line to and from the device, the power generation means for generating power using natural energy, the power supply voltage transmitted from the power supply device and the power supply voltage for driving the amplifier using the output from the power generation means In a television broadcast transmission system provided with an auxiliary power source provided with a power circuit that generates and outputs to the amplifying device side,
A monitoring device provided on a transmission line between the auxiliary power supply and the power supply device to monitor the operation of the amplification device,
Based on a transmission signal transmitted from the amplification device via a transmission line, it is determined whether or not the amplification device is operating normally. When the amplification device is not operating normally, the amplification device is supplied from the power supply device. Using at least one of the output current and the output voltage output to the side, an abnormality determining means for determining a disconnection / short circuit occurring on the amplification device side, and an informing means for informing a determination result by the abnormality determining means, It is characterized by having.

  Next, the invention according to claim 9 is the monitoring device according to claim 8, wherein the abnormality determining means is configured to transmit a notification signal indicating that the auxiliary power supply is operating normally. Determining that the amplifying apparatus is operating normally and determining that an abnormality has occurred on the amplifying apparatus side when the notification signal is not transmitted and determining the disconnection / short circuit. .

  The invention according to claim 10 is the monitoring device according to claim 8, further comprising signal level detection means for detecting a signal level of a television broadcast signal transmitted from the amplifier via a transmission line, The abnormality determining means determines that the amplifying apparatus is operating normally when the signal level detected by the signal level detecting means is higher than the abnormality determining level, and the signal detected by the signal level detecting means If the level is equal to or lower than an abnormality determination level, it is determined that an abnormality has occurred on the amplification device side, and the disconnection / short circuit is determined.

  The invention according to claim 11 is the monitoring device according to any one of claims 8 to 10, wherein when the determining means determines that the amplifying device is operating normally, the amplifying device side transmission line The operation state of the power generation means is determined based on the output current to the power supply, and the notification means is notified of the determination result.

  Furthermore, the invention according to claim 12 is the monitoring device according to any one of claims 8 to 10, wherein a backflow preventing diode is provided on the output path of the power supply voltage to the amplifying device side transmission line. When the abnormality determination unit determines that the amplification device is operating normally, the abnormality determination unit determines an operating state of the power generation unit based on a potential difference between both ends of the backflow prevention diode, and the determination The notification means is notified of the result.

In the television broadcast signal transmission system according to claim 1, on the transmission line between the amplification device and the power supply device, power generation means for generating power using natural energy, the power supply voltage transmitted from the power supply device, and the A power supply circuit that generates a power supply voltage for driving the amplifier using an output from the power generation means and outputs the power supply voltage to the amplifying device side is provided, and further transmission between the auxiliary power supply and the power supply device On the line, there is provided abnormality determination means for determining a disconnection / short circuit occurring on the amplifying device side using at least one of an output current and an output voltage supplied from the power supply device and output to the amplifying device side.

  However, the abnormality determination means provided in the monitoring device determines whether the amplification device is operating normally based on the transmission signal transmitted from the amplification device via the transmission line, and the amplification device operates normally. Since the disconnection / short circuit occurring on the amplification device side is determined when not, the power supply voltage for driving the amplification device is generated only by the output from the power generation means at the auxiliary power supply, and the power supply device Even when the load current does not flow from the amplifier to the amplifier, the abnormality determination means does not erroneously determine the abnormality (disconnection) on the amplifier, and the notification means Only when a short circuit occurs will this be noticed.

  Therefore, according to the television broadcast signal transmission system according to claim 1, not only can the power generation means and the power supply device be used in combination with the amplification device, but also the power supply can be performed, and the monitoring device has caused the amplification device side. It is possible to accurately detect the disconnection / short-circuit abnormality and notify the user to that effect.

  Here, in order for the abnormality determination unit of the monitoring device to accurately determine whether or not the amplification device is operating normally, a notification signal output unit is provided to the auxiliary power supply as described in claim 2. And when the output from the power supply circuit is normal, a notification signal indicating that the amplification device is operating normally is sent to the terminal side. Based on the above, it may be configured to determine that the amplification device is operating normally.

  According to a third aspect of the present invention, the monitoring device is provided with signal level detection means for detecting a signal level of a television broadcast signal transmitted from the amplification device via the transmission line, and the abnormality determination means is When the detected signal level is higher than the abnormality determination level, the amplification device may be determined to be operating normally.

  Then, since it is not necessary to provide a notification signal output means on the auxiliary power source side as described in claim 2, the auxiliary power supply is provided with a power generation means such as a photovoltaic power generation panel. Can be used as they are.

  On the other hand, in the television broadcast signal transmission system according to claim 4, when the abnormality determination means of the monitoring device determines that the amplification device is operating normally, power generation is further performed based on the output current to the amplification device side transmission line. The operation state of the means is determined, and the determination result is notified to the notification means.

  For this reason, according to the television broadcast signal transmission system of the fourth aspect, the notification means can notify the operation state (power generation efficiency, etc.) of the power generation means, and the user can determine the amplification device from the notification contents. You can know the weather condition of the place where is installed. Specifically, if the power generation means is a solar power generation panel, the weather condition can be known, and if the power generation means is a wind power generator, the wind speed and the like can be known.

  Further, in the television broadcast signal transmission system according to claim 5, when the abnormality determination means determines that the amplifier is operating normally, the backflow prevention diode provided in the output path of the power supply voltage Based on the potential difference between both ends, the operating state of the power generation means is determined, and the determination result is notified to the notification means.

  Therefore, also in the television broadcast signal transmission system according to the fifth aspect, similar to the fourth aspect, the notification means can notify the operating state (power generation efficiency, etc.) of the power generation means, and can be used. The person can know the weather condition of the place where the amplification device is installed from the notification contents.

  In the television broadcast signal transmission system according to claim 5, the abnormality determining means determines the operating state of the power generating means based on the potential difference between both ends of the backflow preventing diode. This is because the voltage applied to the backflow preventing diode from the auxiliary power supply side changes according to the amount, and the operating state of the power generation means can be detected by detecting the potential difference between both ends.

  On the other hand, in the television broadcast signal transmission system according to claim 6, on the transmission line between the amplification device and the power supply device, power generation means for generating power using natural energy, and the power supply voltage transmitted from the power supply device And an output from the power generation means is used to generate a power supply voltage for driving the amplifier, and a power supply circuit that outputs the generated power supply voltage to the amplifying device side. On the transmission line, an abnormality determination means for determining the disconnection / short circuit generated on the amplification apparatus side and the operating state of the power generation means based on the output current to the amplification apparatus side transmission line, and the determination result by the abnormality determination means are reported. An informing means is provided.

  In particular, in the present invention, the auxiliary power supply is provided with an electric load that is connected to a transmission path for sending a television broadcast signal to the transmission line on the terminal side and flows a constant load current with the power supply voltage supplied from the power supply device. Therefore, even if the output from the power generation means is sufficient power to operate the internal circuit of the amplifying device, if the transmission line between the auxiliary power supply and the monitoring device is not disconnected, monitoring A constant load current flows from the apparatus to the auxiliary power supply side, and the output current from the power supply apparatus does not become zero unlike when the transmission line is disconnected.

  For this reason, in the television broadcast signal transmission system according to claim 6, not only can the power generation device and the power supply device be used in combination with the amplification device, but also the power can be supplied. The disconnection / short circuit abnormality can be accurately detected, and the user can be informed accordingly.

  In addition, the monitoring device not only detects an abnormality (disconnection / short circuit) occurring on the amplification device side based on the output current to the amplification device side, but also from the output current when the amplification device is operating normally. The operating state of the power generation means is determined. For this reason, according to the television broadcast signal amplifying device described in claim 6, as in the case of claims 4 and 5, the notification means notifies the operating state (power generation efficiency, etc.) of the power generation means. The user can know the weather condition of the place where the power generation means is installed from the notification contents.

  In addition to the power generation means (solar power generation means) such as solar power generation panels using sunlight, wind power generators, geothermal power generators, etc. can be used as power generation means. From the viewpoint of ease of assembly, etc., as the power generation means, it is preferable to use a solar power generation means for generating power by receiving sunlight as described in claim 7.

  Next, in the monitoring device according to claim 8, the abnormality determining means determines whether the amplifying device is operating normally based on a transmission signal transmitted from the amplifying device side via the transmission line. When the normal operation is not performed, the disconnection / short circuit generated on the amplification device side is determined using at least one of the output current and the output voltage to the amplification device side transmission line. Inform.

Therefore, if the monitoring device according to claim 8 is used, the television broadcast signal transmission system according to claim 1 described above can be configured.
In the monitoring device according to claim 9, the abnormality determining means determines that the amplifying device is operating normally when a notification signal is transmitted from the auxiliary power source.

Therefore, if the monitoring device according to claim 9 is used, the television broadcast signal transmission system according to claim 2 described above can be configured.
The monitoring device according to claim 10 is provided with signal level detection means for detecting the signal level of the television broadcast signal transmitted from the amplification device via the transmission line, When the signal level detected by the signal level detection means is higher than the abnormality determination level, it is determined that the amplification device is operating normally.

Therefore, if the monitoring apparatus according to claim 10 is used, the television broadcast signal transmission system according to claim 3 described above can be configured.
Next, in the monitoring device according to claim 11, when the abnormality determination unit determines that the amplification device is operating normally, based on the output current to the amplification device side transmission line, The operating state is determined, and the determination result is notified to the notification means.

Therefore, if the monitoring apparatus according to claim 11 is used, the television broadcast signal transmission system according to claim 4 described above can be configured.
According to a twelfth aspect of the present invention, the backflow prevention diode is provided on the output path of the power supply voltage to the amplifying device side transmission line, and the abnormality determining means is configured so that the amplifying device operates normally. If it is determined, the operating state of the power generation means is determined based on the potential difference between both ends of the backflow prevention diode, and the determination result is notified to the notification means.

  Therefore, if the monitoring device according to claim 12 is used, the television broadcast signal transmission system according to claim 5 described above can be configured.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
FIG. 1 is a block diagram showing the overall configuration of a television broadcast signal transmission system according to a first embodiment to which the present invention is applied.

  As shown in FIG. 1, the television broadcast signal transmission system according to the present embodiment amplifies a television broadcast signal (hereinafter also referred to as a reception signal) received by a receiving antenna 2 and supplies it to a coaxial cable 8 that is a transmission line. The booster 3 as an amplifying device that transmits the amplified received signal to the terminal side by outputting and the received signal transmitted through the coaxial cable 8 installed at the terminal side of the coaxial cable 8 A power supply device 5 that outputs to a TV receiver and the like, receives power from a commercial power supply, generates a power supply voltage for driving the booster 3, and supplies the booster 3 to the booster 3 via the coaxial cable 8. .

  An auxiliary power supply 4 is provided on the coaxial cable 8 between the booster 3 and the power supply device 5 at a position close to the booster 3, and the coaxial cable 8 between the auxiliary power supply 4 and the power supply device 5 is provided. Above, a monitoring device 6 is provided at a position close to the power supply device 5.

Here, the auxiliary power supply 4 is provided with a transmission path for sending a received signal from the booster 3 onto the coaxial cable 8 on the terminal side, and the monitoring apparatus 6 via the coaxial cable 8 is provided on this transmission path. The power supply separation filter 12 for separating the power supply voltage (DC voltage) transmitted in this manner is provided, and the power supply voltage separated by the power supply separation filter 12 is supplied to the constant voltage circuit 16 via the diode D1 for backflow prevention. Is input.

  Further, the auxiliary power source 4 is provided with a photovoltaic power generation panel 14 as power generation means, and the output (generated power) from the photovoltaic power generation panel 14 is also connected to the constant voltage circuit 16 via a backflow prevention diode D2. Is input.

  The constant voltage circuit 16 preferentially uses the output from the photovoltaic power generation panel 14 to generate a power supply voltage (DC constant voltage) for driving the booster 3, and the booster 3 side through the power superimposing filter 17. Output on the transmission path.

  The auxiliary power supply 4 includes a power supply voltage detection circuit 18 that detects the power supply voltage output from the constant voltage circuit 16 and whether or not the detected power supply voltage is normal (in other words, a preset lower limit). A determination circuit 20 for determining whether or not the voltage is equal to or higher than the voltage is provided, and a determination result by the determination circuit 20 is output to the tone signal generation circuit 22. The determination circuit 20 is provided with a reference value setting unit 21 for setting a reference value for determination (lower limit voltage or the like) by an external operation.

  Next, the tone signal generation circuit 22 generates a preset tone signal when the determination circuit 20 determines that the power supply voltage is normal, and the tone signal generation circuit 22 generates the tone signal generation circuit 22. The tone signal is output to the path on the side of the power supply separation filter 12 via the tone signal superimposing circuit 24 provided on the input path of the power supply voltage from the power supply separation filter 12 to the diode D1.

  The power supply separation filter 12 is configured so that a tone signal having a frequency extremely lower than that of the television broadcast signal can pass through the same path as the power supply voltage. Therefore, the tone signal generated by the tone signal generation circuit 22 is The signal is output to the coaxial cable 8 on the terminal side through the tone signal superimposing circuit 24 and the power supply separation filter 12, and transmitted to the monitoring device 6 through the coaxial cable 8.

  On the other hand, the monitoring device 6 is formed with a transmission path of a reception signal for outputting the reception signal transmitted from the booster 3 via the coaxial cable 8 to the power supply device 5. A power supply separation filter 31 for separating the power supply voltage supplied from 5 and a power supply superposition filter 32 for superimposing the separated power supply voltage on the transmission path and sending them to the auxiliary power supply 4 side are provided.

  In the monitoring device 6, an output current (in other words, load current) output to the auxiliary power supply 4 side via the coaxial cable 8 on the output path of the power supply voltage from the power supply separation filter 31 to the power supply superimposing filter 32. ) Is detected, and a detection result (current value) by the load current detection circuit 34 is input to the control circuit 40.

  Since the power superimposing filter 32 is configured in the same manner as the power separation filter 12 provided in the auxiliary power supply 4, the tone signal output from the auxiliary power supply 4 is separated from the received signal via the power superimposing filter 32. The separated tone signal is input to the tone decoder 36.

  The tone decoder 36 decodes the tone signal generated by the tone signal generation circuit 22 in the auxiliary power supply 4 and determines the presence / absence of the signal. The determination result (the presence / absence of tone) is input to the control circuit 40. Is done. The control circuit 40 is also supplied with the voltage value of the power supply voltage output to the power supply superimposing filter 32 via the load current detection circuit 34.

  The control circuit 40 sets the detection result (current value) of the load current input as described above, the determination result indicating the presence / absence of the tone signal, and the voltage value (output voltage) of the power supply voltage output to the coaxial cable 8. Based on the abnormality (disconnection / short circuit) occurring in the transmission path of the received signal from the monitoring device 6 to the booster 3, and the operation state of the photovoltaic power generation panel 14 on the auxiliary power source 4 side are determined. Is notified using three light emitting diodes (LEDs) provided in the display unit 38. In this embodiment, the operation is as shown in FIG.

  That is, the control circuit 40 determines that the booster 3 is operating normally when a tone signal is transmitted from the auxiliary power source 4, and when the tone signal is not transmitted from the auxiliary power source 4, the booster 3 or booster 3. It is determined that a disconnection / short circuit abnormality has occurred on the transmission path up to 3.

  At the time of abnormality determination (that is, when there is no tone signal), disconnection / short circuit is determined based on the load current I and the power supply voltage V. That is, if the load current I is less than the lower limit value Imin and the power supply voltage V exceeds the upper limit value Vmax, it is determined that the wire is disconnected, and the three LEDs provided on the display unit 38 are lit in red, If I exceeds the upper limit value Imax and the power supply voltage V is less than the lower limit value Vmin, it is determined that there is a short circuit, and the three LEDs provided on the display unit 38 blink in red.

  At the time of normal determination (that is, when there is a tone signal), the operating state of the photovoltaic power generation panel 14 is determined based on the load current I, and the energy saving effect by the photovoltaic power generation panel 14 is displayed in four stages.

  That is, when the load current I is “I ≦ 0.3 × It” with respect to the reference value It when the commercial power source is 100%, the usage rate of the photovoltaic power generation panel 14 is 70% or more. If it is determined that there are three LEDs provided on the display unit 38, all of them are lit in green, and if “0.3 × It ≦ I <0.7 × It”, then the photovoltaic power generation panel 14 is used. The rate is determined to be 30% or more and less than 70%, and the two LEDs provided on the display unit 38 are lit in green, and if “0.7 × It ≦ I <0.9 × It” Then, it is determined that the usage rate of the photovoltaic power generation panel 14 is 10% or more and less than 30%, and one LED provided on the display unit 38 is lit in green, and “0.9 × It ≦ I” If there is, it is determined that the usage rate of the photovoltaic power generation panel 14 is less than 10%, and one LE provided in the display unit 38 is provided. The is lit in yellow.

  For this reason, from the lighting state of the three LEDs of the display unit 38, the user not only has an abnormality in disconnection / short circuit, but the weather condition of the installation place of the auxiliary power source 4 at that time is clear, light cloudy, cloudy, Whether it is raining (or night) can be detected.

The control circuit 40 is provided with a reference value setting unit 39 for setting various reference values for determination used for the determination by an external operation.
As described above, in the television broadcast signal transmission system of the present embodiment, when the power supply voltage supplied from the auxiliary power supply 4 to the booster 3 is normal, the tone signal is sent from the auxiliary power supply 4 to the monitoring device 6 as a notification signal. The monitoring device 6 determines whether or not an abnormality has occurred on the booster 3 side by determining the presence or absence of the tone signal, and when the abnormality occurs, the abnormality is detected from the load current and the output voltage. It is determined whether it is a disconnection abnormality or a short circuit abnormality, and the result is displayed on the display unit 38.

  Therefore, according to this embodiment, when the load current does not flow from the monitoring device 6 to the booster 3 side, an abnormality (disconnection) is not erroneously determined, and the monitoring device 6 uses the booster 3 side. The disconnection / short circuit abnormality that has occurred can be accurately detected, and the user can be informed accordingly.

  In this embodiment, when the booster 3 is operating normally, the usage rate of the photovoltaic power generation panel 14 is determined from the magnitude of the load current and displayed on the display unit 38 in four stages. The user can be notified of the energy-saving effect of the solar power generation panel 14 and, in the daytime, the user can know the weather condition outside from the notification result, and the usability can be improved.

  In the present embodiment, the auxiliary power supply 4 has been described as determining whether or not the booster 3 is operating normally based on the output voltage (power supply voltage) from the constant voltage circuit 16. The operating state of the booster 3 may be determined from the load current that flows from 16 to the booster 3 side.

  In this embodiment, the photovoltaic power generation panel 14 provided in the auxiliary power supply 4 corresponds to the power generation means of the present invention, the constant voltage circuit 16 corresponds to the power supply circuit of the present invention, and the tone signal also. The generation circuit 22 corresponds to the notification signal output means of the present invention. Further, the control circuit 40 provided in the monitoring device 6 corresponds to the abnormality determination unit of the present invention, and the display unit 38 similarly corresponds to the notification unit of the present invention.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
FIG. 3 is a block diagram showing the configuration of the entire television broadcast signal transmission system of the second embodiment.

  As shown in FIG. 3, in the television broadcast signal transmission system of the present embodiment, the auxiliary power source 4 includes a power source separation filter 12, a diode D1, a photovoltaic power generation panel 14, a diode D2, and a constant voltage circuit 16. , And the power supply superimposing filter 17.

Further, the monitoring device 6 is provided with a power supply separation filter 31, a power supply superimposing filter 32, a load current detection circuit 34, a display unit 38, a reference value setting unit 39, and a control circuit 40.
Since these units are the same as those in the first embodiment, detailed description thereof is omitted, and in the following description, differences from the first embodiment will be described.

  As shown in FIG. 3, in the monitoring device 6, a branch circuit 41 that branches a part of the received signal is provided on the transmission path from the coaxial cable 8 to the power superimposing filter 32. The branched received signal is input to the detector 44 through a band pass filter (BPF) 42 that selectively passes a television broadcast signal received by the receiving antenna 2 for a plurality of channels.

  The detector 44 detects the signal level by detecting the reception signal input via the BPF 42, and the detection signal from the detector 44 is input to the determination circuit 46.

  Further, the determination circuit 46 determines whether or not the reception signal is normally output from the booster 3 by determining whether or not the signal level of the reception signal is equal to or lower than the abnormality determination level (in other words, the booster 3 is normal). Whether it is operating or not).

Then, the determination result (normal / abnormal of the booster 3) by the determination circuit 46 is input to the control circuit 40, and the control circuit 40 is input from the determination result and the load current detection circuit 34 as in the above embodiment. Based on the current value of the load current and the voltage value of the power supply voltage, disconnection / short circuit is determined when the booster 3 is abnormal, and the usage rate of the photovoltaic power generation panel 14 is determined when the booster 3 is normal. This is displayed on the display unit 38.

Therefore, also in the television broadcast signal transmission system of this embodiment, the same effect as that of the first embodiment can be obtained.
In this embodiment, the branch circuit 41, the BPF 42, and the detector 44 provided in the monitoring device 6 correspond to the signal level detection means of the present invention, and the determination circuit 46 and the control circuit 40 are abnormality determination means. It corresponds to.

  Here, in each of the above embodiments, the control circuit 40 has been described as using load current when determining the disconnection / short circuit on the booster 3 side and the usage rate of the photovoltaic power generation panel 14, but FIG. As shown in (a), a backflow prevention diode D3 is provided in the output path of the power supply voltage from the power supply separation filter 31 to the power supply superimposing filter 32 in place of the load current detection circuit 34, and the voltages V1, V2 (V1: cathode side voltage, V2: anode side voltage) is input to the control circuit 40. In the control circuit 40, as shown in FIG. 4B, when the booster 3 is abnormal (no tone signal). In addition, even when the booster 3 is normal (with a tone signal), the disconnection / short circuit and the usage rate of the photovoltaic power generation panel 14 may be determined only by these voltage values V1 and V2.

  That is, at the time of abnormality, if the power supply voltage V exceeds the upper limit value Vmax, it is determined that the circuit is disconnected, and if the power supply voltage V is less than the lower limit value Vmin, it is determined that a short circuit occurs. LED is turned on or blinked in the same manner as in the above embodiment, and when it is normal, the potential difference (V1−V2) between both ends of the diode D3 is compared with the determination criteria Vref1 to Vref4, respectively. The rate is determined in four stages, and the determination result is notified using three LEDs provided on the display unit 38, as in the above embodiment.

[Third embodiment]
Next, a third embodiment of the present invention will be described.
FIG. 5 is a block diagram showing the configuration of the entire television broadcast signal transmission system of the third embodiment.

  As shown in FIG. 5, in the television broadcast signal transmission system of the present embodiment, the auxiliary power supply 4 includes a power supply superimposing filter 17, a power supply separation filter 12, a diode D1, a photovoltaic power generation panel 14, and a diode D2. And the constant voltage circuit 16. The monitoring device 6 includes a power supply separation filter 31, a power supply superimposition filter 32, a load current detection circuit 34, a display unit 38, a reference value setting unit 39, and a control circuit 40. It is composed of

Since these units are the same as those in the first and second embodiments, detailed description thereof is omitted, and in the following description, differences from the above embodiments will be described.
As shown in FIG. 5, the auxiliary power source 4 is provided with a load resistor R having one end grounded to the ground line on the output path of the received signal between the power source separation filter 12 and the coaxial cable 8. The load resistance R is an electric load that allows a constant load current to flow at the power supply voltage supplied from the monitoring device 6. In this embodiment, for example, a very small current of about 0.5 mA to 2 mA is allowed to flow. The resistance value is set to a large resistance value of about 10 kΩ to 20 kΩ.

On the monitoring device 6 side, as shown in FIG. 6, the control circuit 40 determines that the load current I is less than the lower limit value Imin based on the load current and the power supply voltage detected by the load current detection circuit 34.
If the power supply voltage V exceeds the upper limit value Vmax, disconnection is determined, and if the load current I is “Imin ≦ I ≦ 0.3 × It”, the usage rate of the photovoltaic power generation panel 14 is 70% or more. Judge that there is.

  That is, in this embodiment, since the auxiliary power supply 4 is provided with the load resistance R, even if the booster 3 is operated only by the output from the photovoltaic power generation panel 14 (use rate 100%), the auxiliary power supply 4 is monitored. If no disconnection has occurred with the device 6, a constant load current flows from the monitoring device 6 to the auxiliary power supply 4, and the load current does not become lower than the lower limit as in the case of the disconnection. Therefore, according to the present embodiment, disconnection and sunlight can be detected from the load current without determining the operating state of the booster 3 using the transmission signal from the booster 3 side as in the first and second embodiments. This makes it possible to distinguish the usage rate of the power generation panel 14 from 100%.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention.
For example, in the above-described embodiment, the auxiliary power source 4 is described as being configured separately from the booster 3, but the auxiliary power source 4 is connected to the body case 50 of the booster 3 as shown in FIG. You may make it attach.

  That is, the booster 3 shown in FIGS. 7 and 8 includes a main body case 50 in which an antenna connection terminal and a reception signal output terminal are assembled, and various circuits such as an amplifier circuit are housed therein, and a front surface of the main body case 50. And a lid 52 that seals the opening, and the lid 52 is attached to the main body case 50 via a fixture 54 so that the opening can be opened and closed.

  In the booster 3 shown in FIG. 7, the auxiliary power source 4 is provided with an arm portion 4 a for attachment via the fixture 54 together with the lid body 52, and the arm portion 4 a is covered via the fixture 54. By mounting on the body 52, the auxiliary power source 4 is swung in the same direction as the opening and closing direction of the lid body 52, and the light receiving surface of the photovoltaic power generation panel 16 provided in the auxiliary power source 4 is set at a desired angle (elevation angle). ) Can be positioned.

  Further, in the booster 3 shown in FIG. 8, the auxiliary power source 4 is fixed to the upper end surface of the main body case 50 disposed above when the booster 3 is installed on a support column or the like via a dedicated fixture 60. .

  The fixture 60 includes a first fixture 62 that is fixed to the back surface of the auxiliary power source 4 (a surface opposite to the light receiving surface of the photovoltaic power generation panel 14), and a second fixture that is fixed to the upper end surface of the main body case 50. The first fixture 62 is provided with a rod 62b having a spherical projection 62a provided at the tip thereof.

  The second fixture 64 has a storage portion 64a for storing the spherical protrusion 62a, and extends from the storage portion 64a, and is tightened at the tip with a screw 66 so that the spherical protrusion 62a is stored in the storage portion. An operation unit 64b for fixing in 64a is provided.

  Therefore, according to the booster 3 shown in FIG. 8, the orientation of the light receiving surface of the photovoltaic power generation panel 14 provided in the auxiliary power supply 4 is adjusted both in the elevation angle direction and in the horizontal direction, with the protrusion 62a of the ball field as the center. The auxiliary power supply 4 can be firmly fixed to the main body case 50 by tightening the operation portion 64b of the second fixture 64 with the screw 66 after the adjustment.

Therefore, if the auxiliary power source 4 is externally attached to the main body case 50 of the booster 3 as shown in FIGS. 7 and 8, the auxiliary power source 4 (and thus the photovoltaic power generation panel 14) receives light when the booster 3 is installed. The usage rate of the photovoltaic power generation panel 14 can be increased by adjusting the direction of the surface so that sunlight can be received efficiently.

  7A is a front view of the booster 3 as viewed from the front surface that is opened and closed by the lid 52, and FIG. 7B is a right side view thereof. 8A is a right side view of the booster 3, FIG. 8B is a plan view of the second fixing device 64 as viewed from above, and FIG. 8C is a side view thereof.

It is a block diagram showing the structure of the television broadcast signal transmission system of 1st Embodiment. It is explanatory drawing showing the determination operation | movement of the control circuit of 1st Embodiment. It is a block diagram showing the structure of the television broadcast signal transmission system of 2nd Embodiment. It is explanatory drawing showing the modification of 1st, 2nd embodiment. It is a block diagram showing the structure of the television broadcast signal transmission system of 3rd Embodiment. It is explanatory drawing showing the determination operation | movement of the control circuit of 3rd Embodiment. It is explanatory drawing showing an example of the booster which externally attached the solar power generation panel. It is explanatory drawing showing the other example of the booster which attached the photovoltaic power generation panel externally.

Explanation of symbols

  2 ... receiving antenna, 3 ... booster, 4 ... auxiliary power source, 4a ... arm part, 5 ... power supply device, 6 ... monitoring device, 8 ... coaxial cable, 12 ... power source separation filter, 14 ... solar power generation panel, 16 ... constant Voltage circuit, 17 ... Power supply superposition filter, 18 ... Power supply voltage detection circuit, 20 ... Determination circuit, 21 ... Reference value setting unit, 22 ... Tone signal generation circuit, 24 ... Tone signal superposition circuit, 31 ... Power supply separation filter, 32 ... Power superimposition filter, 34 ... load current detection circuit, 36 ... tone decoder, 38 ... display unit, 39 ... reference value setting unit, 40 ... control circuit, 41 ... branch circuit, 44 ... detector, 46 ... determination circuit, 50 ... Main body case, 52 ... lid, 54 ... fixing tool, 60 ... fixing tool, 62 ... first fixing tool, 62a ... projection, 62b ... rod, 64 ... second fixing tool, 64a ... storage part, 64b ... operation part.

Claims (12)

In a television broadcast signal transmission system provided on a transmission line for transmitting a television broadcast signal, an amplification device that operates by receiving power supply from a power supply device on the terminal side of the transmission line
On the transmission line between the amplification device and the power supply device,
Power generation means for generating power using natural energy;
A power supply circuit that generates a power supply voltage for driving the amplifier using a power supply voltage transmitted from the power supply device and an output from the power generation means, and outputs the power supply voltage to the amplifying device side;
Auxiliary power supply with
On the transmission line between the auxiliary power supply and the power supply device,
Based on a transmission signal transmitted from the amplification device via a transmission line, it is determined whether or not the amplification device is operating normally. When the amplification device is not operating normally, the amplification device is supplied from the power supply device. Using at least one of an output current and an output voltage output to the side, an abnormality determination means for determining a disconnection / short circuit occurring on the amplification device side;
Notification means for notifying the determination result by the abnormality determination means;
A television broadcast signal transmission system, characterized in that a monitoring device comprising: is provided. When the output from the power supply circuit is normal, the auxiliary power supply generates a notification signal indicating that, and sends the generated notification signal to the terminal side via the transmission line Is provided,
The abnormality determining means of the monitoring device determines that the amplification device is operating normally when the notification signal is transmitted from the auxiliary power source, and when the notification signal is not transmitted, The television broadcast signal transmission system according to claim 1, wherein the disconnection / short circuit is determined by determining that an abnormality has occurred on the amplification device side. The monitoring device includes
A signal level detecting means for detecting a signal level of a television broadcast signal transmitted from the amplifying device via a transmission line is provided;
The abnormality determining means determines that the amplifying apparatus is operating normally when the signal level detected by the signal level detecting means is higher than the abnormality determining level, and the signal detected by the signal level detecting means 2. The television broadcast signal transmission system according to claim 1, wherein if the level is equal to or lower than an abnormality determination level, it is determined that an abnormality has occurred on the amplification device side, and the disconnection / short circuit is determined.   In the monitoring device, when the abnormality determination unit determines that the amplification device is operating normally, the abnormality determination unit determines an operation state of the power generation unit based on an output current to the amplification device side transmission line, and the determination result The television broadcast signal transmission system according to any one of claims 1 to 3, wherein the notification means is notified. In the monitoring device,
On the output path of the power supply voltage to the amplification device side transmission line, a diode for preventing backflow is provided,
When the abnormality determination means determines that the amplification device is operating normally, the abnormality determination means determines an operating state of the power generation means based on a potential difference between both ends of the backflow prevention diode, and the determination result is indicated by the notification means. The television broadcast signal transmission system according to claim 1, wherein the television broadcast signal transmission system according to claim 1 is notified. In a television broadcast signal transmission system provided on a transmission line for transmitting a television broadcast signal, an amplification device that operates by receiving power supply from a power supply device on the terminal side of the transmission line
On the transmission line between the amplification device and the power supply device,
Power generation means for generating power using natural energy;
A power supply circuit that generates a power supply voltage for driving an internal circuit using a power supply voltage supplied from the power supply device and an output from the power generation means, and supplies the power supply voltage to the internal circuit;
An electric load connected to a transmission path for sending the amplified television broadcast signal to a transmission line on the terminal side, and causing a constant load current to flow at a power supply voltage supplied from the power supply device;
Auxiliary power supply with
On the transmission line between the auxiliary power supply and the power supply device,
Based on the output current to the amplifying device side transmission line, a disconnection / short circuit occurring on the amplifying device side and an abnormality determining means for determining the operating state of the power generation means,
Notification means for notifying the determination result by the abnormality determination means;
A television broadcast signal transmission system, characterized in that a monitoring device comprising: is provided.   The television broadcast signal transmission system according to any one of claims 1 to 6, wherein the power generation means provided in the auxiliary power source is a solar power generation means that receives sunlight to generate power. An amplifying device that operates by receiving power supply from a power supply device on the terminal side of the transmission line is provided on a transmission line that transmits a television broadcast signal, and the transmission line between the amplifying device and the power supply device is naturally A power generation means for generating power using energy, a power supply voltage transmitted from the power supply apparatus, and an output from the power generation means are used to generate a power supply voltage for driving the amplifier and output it to the amplification apparatus side. In a television broadcast transmission system provided with an auxiliary power source with a power circuit,
A monitoring device provided on a transmission line between the auxiliary power supply and the power supply device to monitor the operation of the amplification device,
Based on a transmission signal transmitted from the amplification device via a transmission line, it is determined whether or not the amplification device is operating normally. When the amplification device is not operating normally, the amplification device is supplied from the power supply device. Using at least one of an output current and an output voltage output to the side, an abnormality determination means for determining a disconnection / short circuit occurring on the amplification device side;
Notification means for notifying the determination result by the abnormality determination means;
A monitoring device comprising:   The abnormality determining means determines that the amplification device is operating normally when a notification signal indicating that the auxiliary power supply is operating normally is transmitted from the auxiliary power source, and the notification signal is not transmitted. 9. The monitoring device according to claim 8, wherein it is determined that an abnormality has occurred on the amplification device side, and the disconnection / short circuit is determined. Comprising signal level detection means for detecting a signal level of a television broadcast signal transmitted from the amplifying device via a transmission line;
The abnormality determining means determines that the amplifying apparatus is operating normally when the signal level detected by the signal level detecting means is higher than the abnormality determining level, and the signal detected by the signal level detecting means The monitoring device according to claim 8, wherein if the level is equal to or lower than an abnormality determination level, it is determined that an abnormality has occurred on the amplification device side, and the disconnection / short circuit is determined.   When the abnormality determination unit determines that the amplification device is operating normally, the abnormality determination unit determines an operation state of the power generation unit based on an output current to the amplification device side transmission line, and the determination result is indicated by the notification unit. The monitoring device according to any one of claims 8 to 10, wherein the monitoring device is notified. On the output path of the power supply voltage to the amplification device side transmission line, a diode for preventing backflow is provided,
When the abnormality determination means determines that the amplification device is operating normally, the abnormality determination means determines an operating state of the power generation means based on a potential difference between both ends of the backflow prevention diode, and the determination result is indicated by the notification means. The monitoring device according to any one of claims 8 to 10, wherein the monitoring device is notified.

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