JPS58172024A - Power supply device for community reception - Google Patents

Abstract

PURPOSE:To prevent unnecessary power consumption and to prolong the life of receiving equipment by cutting off current supply from a power source part consisting of a solar battery and a storage battery to community receiving equipment when the reception detection output of a broadcast wave is less than a specific value. CONSTITUTION:In television community receiving facilities, when a broadcast wave is received from a wide band antenna 3 for broadcast wave presence detection, the amplifying circuit 14 of a power source switching device 10 amplifies the received signal and the amplified signal is detected at a part 15 and sent to a level deciding circuit 16. When the detected level is greater than the specific value, the circuit 16 connects the contact of a relay 18 to a side 19b through a relay operating circuit 17 to supply a current from the power source part 9 consisting of a solar battery 4 and a storage battery device 6 to a television receiving amplifier 2 and the amplified television signal is sent from a terminal 21 to the television receiver. While there is no broadcast in the midnight, there is no broadcast wave from the antenna 3 and only a noise appears; when the circuit 16 judges that the detected level is less than the specific value, the circuit 17 is operated to place the relay contact at a side 19a and the current supply to the amplifier 2 is cut off to prevent the consumption of the battery 8 while prolonging the life of the amplifier 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device used for joint reception of FM, television broadcasting, etc.

In today's era when saving power consumption is called for, many of the devices used for communal television reception are still operating even after late-night channel television broadcasts have ended. , amplifier circuits, attenuation circuits, etc., resulting in completely unnecessary power consumption. What's more, all of that power comes from precious commercial power sources.

The present invention aims to eliminate such waste, extend the life of the equipment itself by eliminating such waste, and provide a power supply device for community reception that can output FM and television signals in high quality. It is.

The drawings showing the embodiments of the present application will be described below.

Fig. 1 is a schematic diagram showing an example of a reception point device of a television communal reception facility, and Fig. 2 is a block diagram of the device.
Corresponding parts in both figures are designated by the same reference numerals. 02 is a receiving antenna that receives television broadcast waves from the broadcasting tower 33, and can be used in various ways as needed, such as a channel-specific type or a wideband type.
is a receiving amplifier commonly called a head amplifier, and is equipped with an amplifier dedicated to each channel or a TV channel converter. 20 is the input terminal of the receiving amplifier;
1 indicates an output end, and 22 indicates a power supply end.

Reference numeral 3 denotes a wideband antenna exemplified as a detection unit, and its reception band is selected to be a band in which all broadcast waves to be received in the illustrated television common reception facility can be received. However, the sensitivity may be such that it is possible to determine whether broadcast waves are being received or not. 4 indicates a solar cell;
Silicon, GaAs.

CdS, CdTe solar cells, etc. are used. The solar cell 4 generates an electromotive force for operating the reception amplifier 2 during the time period when sunlight 34 reaches the solar cell 4, and also includes a storage 7 and a storage battery 8, which will be described later. As the storage battery 8, it is appropriate to use a nickel-cadmium storage battery that is not easily damaged by overcharging or overdischarging, but other storage batteries (
(Secondary battery) For example, a lead-acid battery or the like can also be used. 9
indicates a power supply unit constituted by the solar cell 4 and the power storage device 6. Reference numeral 10 denotes a power switching device that supplies direct current from the power supply section 9 to the receiving amplifier 2 or cuts off the supply. In the power switchgear 10, a detection signal input terminal 11 receives a signal received by the broadband antenna 3. 12 is the first power supply terminal and the power supply section 9
It is connected to the. 13 is the second power supply terminal for receiving amplifier 2.
It is connected to the. 14 is an amplifier circuit that amplifies the television signal received by the wideband antenna 3. A detection circuit 15 is used to detect the signal from the amplifier circuit 14. Reference numeral 16 denotes a level determination section which is configured to generate an output signal when the television signal is not present and the input signal to itself falls below a certain value. For example, a Schmitt trigger circuit is used for the level determination section. Reference numeral 17 denotes a relay operating circuit which operates the relay 18 in response to a signal from the level determining section 16. Reference numeral 19 denotes a contact of the relay 18, which is switched to the contact 19a side or the contact 19b side depending on the signal from the level determination section 16. Next, reference numeral 23 denotes a power feed line that connects the power feed section 24 of each reception antenna and the input terminal 20 of the reception amplifier 20, and a coaxial cable is mainly used. Similarly, 25 indicates a power feed line that connects the power feed section 26 of the detection broadband antenna 3, which detects whether there is a TV broadcast wave, and the input end 11 of the power switchgear 10, and is mainly a coaxial cable. is used. 27.
28 and 29 are transmission lines for transmitting power supply current, and cables are used for each. 30 is a transmission line for connecting the output end 21 of the receiving amplifier 2 and a television receiver in a receiving facility or a subsequent receiving device, and a coaxial cable is mainly used. In addition, 31 is a support for installing equipment, 32
indicates the support for antenna mounting.

In the above configuration, receiving antenna 1. Simply add a solar cell 4. Wideband antenna 3. Power storage device 6. This is a simple configuration that only requires the addition of a power switch 10. In addition, since the solar battery 4 and the storage battery 8 are used as the power supply unit 9, there is no need to connect the commercial power supply line and the TV common reception, and therefore abnormal voltage due to lightning strikes or induced lightning from the power transmission line, distribution line, etc. This prevents people from invading the communal reception facility and destroying equipment.

With the above configuration, the operation of the power supply device under various operating environments will be explained. In each case below, it is assumed that the storage battery 8 is sufficiently charged.
It is assumed that the amplifier circuit 14, level discrimination unit 16, and relay operating circuit 17 in the power switchgear 10 are always in a normal operating state. An electromotive force is generated in the battery 4 and the storage battery 8 is charged, and a power supply current flows from the power supply section 9 to the first power supply terminal 12 of the power supply switching device 10. On the other hand, the broadband antenna 3 for detecting the presence or absence of broadcast waves receives the broadcast waves and inputs them to the detection signal input terminal 11 of the power switchgear 10 . This received signal is amplified in a wideband amplifier 14,
The signal is detected by the detection circuit 15, becomes a signal with a level equal to or higher than a predetermined value, and is input to the level determination section 16. The level determination unit 16 does not generate an output signal, and as a result, the relay activation circuit 17 activates the relay 18, and the relay contact 19 is stabilized on the contact 19b side. In this way, the power supply current from the power supply section 9 flows from the second power supply terminal I3 of the power switchgear 10 to the reception amplifier 2, and the reception amplifier 2 receives the broadcast wave television signal received by the antenna 1 for each channel. It is level-adjusted and amplified before being sent to subsequent facilities. As a result, each television receiver in the reception facility can enjoy television with high quality images.

(IB) During the day or night when there is no sunlight, the solar cell 4 does not generate an electromotive force, and a power supply current flows from the power supply section 9 to the first power supply terminal 12 of the power switchgear 10 due to discharge of the storage battery 8. The power supply current is supplied to the receiving amplifier 2 in the same manner as in the case (IA) below.

(2) When there is no television broadcasting (2A) When there is sunlight in the daytime An electromotive force is generated in the solar cell 4 and the storage battery 8 is charged. A power supply type current flows to the power supply terminal 12. On the other hand, the broadband antenna 3 does not receive broadcast waves, and the broadband amplifier 1
4, only noise is amplified, and the detection output in the detection circuit 15 is at a level below a predetermined value. An output signal is generated in the level determination section 16, and the relay activation circuit 17 activates the relay 18 so that the relay contact 19 is on the contact 19a side. In this way, no power supply current is supplied from the second power supply terminal 13 of the power switchgear 10, and the receiving amplifier 2
It is possible to prevent unnecessary power consumption.

(2B) In the case of a day without sunlight or a dark night, the solar cell 4 does not generate an electromotive force, and the discharge of the storage battery 8 causes a current to flow to operate each part of the power switchgear IO. Similarly to the case (2A) below, no power supply current is supplied to the receiving amplifier 2, and wasteful power consumption can be prevented.

As is clear from the above explanation, the predetermined constant value level used for discrimination in the level discriminator 16 is the weakest of the broadcast waves broadcast at the receiving facility, which is received by the wideband antenna. The detection output level of
Set between the noise detection output level and the noise detection output level.

Next, Fig. 3 is a schematic diagram showing an example of a line amplifying device in a television common reception facility. Items with the same or equivalent functions as those in the previous figure are indicated with the same reference numerals followed by the letter e, and redundant explanations will be omitted. Omitted.

35 is a line amplifier, and various amplifiers such as a main line amplifier, a main line branch amplifier, etc. are used. 36 is a TV signal input end;
37 is an output end, and 38 is a power supply end. 39.40 is a transmission line, for example, a coaxial cable is used. The transmission line 39 is used to connect the line amplifier 35 and the preceding television receiving equipment, and the transmission line 40 is used to connect the line amplifier 35 and the succeeding television receiving equipment.

The above is the power switchgear 10. ]Detection signal input terminal 11 at Oe. An example is shown in which broadband antennas 3 and 3e are connected to lle, but transmission line 23.39 or transmission line 3
A brancher or distributor for extracting TV broadcast waves is installed at 0.40, and the signal input terminal II, li is used to detect the branch/distribution output.
It is also possible to input the information to e.

Further, the receiving amplifier 2. Alternatively, if a line amplifier 35 equipped with a power supply separation circuit configured by combining a coil and a capacitor is used, the power supply current can also be sent to the receiving equipment at the front and rear stages.

Next, FIG. 4 is a perspective view showing a power supply device having a different configuration, and parts having the same or equivalent functions as those in the previous figure are given the same reference numerals and the letter f, and redundant explanation will be omitted. 41
1 is a case main body that houses the main parts of the power supply device, and inside thereof, a power storage device 6f, a power supply switching device 10f, and a cable 46 that connects each part are housed. 42 indicates a case lid body.

Reference numeral 43 denotes an input terminal into which a detection signal for detecting the presence or absence of broadcast waves is input, and is connected to an external broadband antenna or a branch end of a branching device. Note that inside the case body 41, it is connected to the detection signal input terminal 11f of the power switch 10f by a cable 46. Reference numeral 44 denotes a solar cell connection terminal, and 045 indicates a power supply terminal, which is connected to a power storage device inside the case body 41, and is connected to a power supply terminal of a communal reception device such as an amplifier installed outside the case. Inside the case body 41, the cable 46 is connected to the second power terminal 13f of the power switching device]Of.

The configuration shown in Fig. 4 includes a power storage device 6f, a power switchgear 1
Since the 0f is housed in one case, it is easy to attach it to a pole or the like.

As described above, in the present application, when broadcasting is being performed, power supply current from the power supply section is supplied to each device for receiving broadcasting, and when the last wave of broadcasting has stopped, the power supply Since the current supply is cut off, wasteful power consumption can be prevented and the life of the receiving equipment can be extended.

Moreover, since the power supply section is composed of a solar cell and a storage battery, loss of valuable commercial power can be prevented.

Historically, it has excellent features such as low construction costs because it has a simple configuration that requires only adding a power supply section and a power switchgear to an existing receiving facility.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of a reception point device in a television communal reception facility, FIG. 2 is a block diagram of the above device, and FIG. 3 is a schematic diagram showing an example of a line amplification device in a television communal reception facility. FIG. 4 is a perspective view showing a power supply device with a different configuration. 4... Solar cell, 8... Storage battery, 9. Proboscis/power supply section,
10... Power switchgear, 11... Signal input terminal for detection. Patent applicant Maspro Electric Works Co., Ltd. Representative Takashi Hatade Figure 4 29f

Claims (1)

[Claims] In a power supply device that is equipped with a power supply section consisting of a solar cell and a storage battery, and a power supply switchgear, the power supply switchgear is equipped with the above-mentioned power switchgear when a broadcast wave signal is input to a detection signal input terminal provided therein. The power supply current from the power supply unit is supplied to the communal reception equipment, and when the broadcast wave signal is not input to the detection signal input terminal, the supply of power supply current from the power supply unit is cut off. A power supply device for communal reception characterized by: