CN2190826Y - Automatic positioning driver for TV antenna - Google Patents

Abstract

The utility model relates to an automatic direction-fixing driver of a television antenna, which comprises an input magnification part, a control-starting point adjustment part, a switch driving part and an execution part which are arranged in a finished television body; analog variable in the television is isolated and amplified to drive an outdoor all-channel direction-fixing antenna to rotate and stop. The utility model can automatically realize optimum direction receiving when channels are selected manually or in a remote-control mode, and more especially, the receiving channels are changed. The antenna automatically looks for the optimum receiving direction to realize one-time operation.

Description

Automatic positioning driver for TV antenna

The design is intended to solve the directional reception problem of different television channels.Its outstanding advantage is to realize automatically that when manual or remote control channel selection optimum orientation receives.

Commercially available television antenna remote controller roughly is divided into two kinds: one is manual wired remote control, and generally by remote control switch, single phase alternating current (A.C.) is formation such as reversible electric machine at a slow speed.By a switch, the electric motor starting rotation, antenna turns to thereupon, observation television machine acoustic image, when optimum state occurs, trip switch, the motor stall, direction is fixed; As poor effect, can press a switch again, motor is opposite spin then.It is two for preseting each receiving channels direction respectively, promptly so-called memory function before watching; By next pre-set channel switch, a corresponding receive direction.Generally by initialize switch, presetting potential device, comparison amplifier, formations such as power motor.Also belong to wired remote control.These two kinds of detailed principles of remote controller are seen the relevant article of " CYBERSPACE " " radio ".All need to carry out secondary operation, promptly select channel one time, select first power to, with regard to RTV remote television, lost the meaning of remote control channel selection, use inconvenience.

The scheme that the design proposes can realize disposable operation, realizes automatically that when manual or remote control channel selection optimum orientation receives.

Television receiver receives a certain channel signals, and when reaching certain intensity, some analog quantity in the machine can change, as black-and-white TV synchronizing separator tube collector voltage can reduce; The black and white of color television set, color switching signal, the high-low level conversion can take place in purified signal etc.Get these simulation volumes, through isolate amplifying, the rotation of control antenna with stop, promptly having controlled the direction of antenna.

Above-mentioned principle can realize like this: install components and parts shown in the accompanying drawing (its quality must reliably) in a printed board this plate is fixed in the TV shell, with lead with the A point connect television set base plate analog variable end (as synchronous separator tube collector electrode, adopt look, black-and-white signal diverter switch voltage end etc.,) the B point connects television set public domain (zero potential) F point and connect the 12V positive supply, the G.H point connects mains switch and goes out end, I.J point order cross streams is reversible electric machine at a slow speed, mixes all channel antenna (must be that directional antenna, directivity heal by force better).Just can come into operation, use with the black and white machine to be example: energized, put the sky channel, the W center head connects high potential, and is then 9014 saturated, 8050 end, relay, J disconnects, and steer motor M does not have electric stall; Regulate W and make 9014 to withdraw from the saturation region, then 8050 conductings, relay J adhesive, positive and negative direction rotation is done in steer motor M energising, receive a certain channel, and signal is when reaching certain intensity, A point current potential reduces, C point current potential raises, 9014 base potential raise saturated, and 8050 end, and relay unclamps, the motor stall, direction is fixed.

As seen adopt such scheme can realize automatically that when channel selection optimum orientation receives, simple in structure, cost is low, and is effective.

Design is described further to the utility model below in conjunction with the embodiment accompanying drawing.

Metal-oxide-semiconductor mainly plays buffer action among the figure, level influence before and after eliminating, and W starts to control sensitivity in order to adjusting; 9014,8050 constitute switching circuit, and DW shields and prevents that metal-oxide-semiconductor from puncturing, and G.H and I.J two windings point can be changed; promptly a winding mains switch goes out end, a termination power motor.

Receive certain intensity TV signal, A point current potential is as rising, and then 2 of D, E link to each other; Receive certain intensity TV signal, A point current potential is as descending, and 2 of C, D link to each other.

Claims (2)

1, a kind of television antenna automatic orientation driver, it comprises the input amplification, starts to control an adjusting, switch drive, execution four parts; By field effect transistor; triode; diode; resistance; relay; exchanging at a slow speed, reversible electric machine is electrically connected to form; it is characterized in that: the protection diode DW 1 termination field effect transistor mos gate utmost point (A point; signal input end); one end ground connection (B point; the public domain line); the MOS drain electrode connects positive supply (F point) by 1OK resistance; source electrode connects public domain end (B point) by 1OK resistance; D; C point and D; the E point is used by reality and selects to connect; potentiometer W 1 termination D point; one end ground connection (B point); center head connects triode 9014 base stages; 9014 collector electrodes connect positive supply (F point) by 1OK resistance; connect triode 8050 base stages simultaneously, 9014 and 8050 grounded emitters (B point), 8050 collector electrodes connect positive supply (F point) by relay; protection diode 2CP reversal connection is in the relay J two ends, the relay switch end be connected to 220 volts of civil powers after power motor is connected.

2, the driver of narrating according to claim 1, it is characterized in that: be installed in the finished product tv body, + 12V power supply is taken from television set base plate, (F point, B point are connected with the television set base plate), utilize the interior analog variable of machine to make control signal (input of A point), the 220V civil power is taken from the internal power supply switch and is gone out end.

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