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DESCRIPTION JPS52168267

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DESCRIPTION JPS52168267
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the
present invention, FIG. 2 and FIG. 3 are the same part detailed circuit diagrams, and FIG. 4 is a
conventional example. 1 ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Transmitter
иии Receiver и 8 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и. .. Pulse width determination circuit 15,. Block, m ииииииииииииииии
DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a transducer
drive circuit K11ll of an ultrasonic pulse switch. Generally, the ultrasonic output of the ultrasonic
pulse switch is preferably large in order to falsify the 8M ratio. 0 Normally, the ultrasonic output
is inserted between a transducer acting as a transmitter and an oscillator to amplify a round
amplifier Depending on the possible amplitude, the amplifiable amplifier width of the amplifier
depends on the magnitude of the supply voltage. Therefore, a method is conceivable in which the
voltage applied to the ultrasonic pulse switch is boosted by inserting a power transformer
between it and the power supply, but in this case (a) it functions as a transmitter requiring a
power transformer (port) The impedance of the oscillator is low and impedance matching can not
be suitably taken ? ? It is necessary to use a high breakdown voltage (loose) element for the
element of the transistor or capacitor? if it is uneconomical) The amplification amplitude of the
amplifier can not be substantially increased substantially because the heat is generated and the
reactive power is large. Also, conventionally, as shown in FIG. 1, a transformer (2) having a first
composite winding whose number of turns is OK and a second son winding whose number of
turns is small is a power supply. , And the high voltage is applied by connecting the output end of
the 102nd primary winding only to the 10th block including the transmitter and the amplifier in
front of the transmitter through the first rectifier circuit section. The second block BK excluding
the tenth block by increasing the amplifiable amplitude of the amplifier, while excluding the
tenth block through the second rectifier circuit (the end) of the output terminal of the third
eighth winding. I was connected. Although it is possible to increase the amplifiable amplitude of
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the amplifier at the front stage of the transmitter from this K, it is necessary to make eight types
of transformers 02-- inserted between the power supply and the source, and the operation is
complicated and uneconomical The present invention aims at providing a transducer (3) drive
circuit of an ultrasonic pulse switch which can eliminate the above-mentioned drawbacks. Next,
the draft will be described with reference to the drawings. In FIGS. 1 to 3, (1) is an oscillator, and
a first amplifier (3) K is connected via a first gate circuit (z), and the first amplifier (3) A
transmitter (4) is connected to the output end of. (6) is a receiver, which receives a reflected
wave by an object theory such as a person of ultrasonic waves sent from the transmitter (4). (6) l
(7) is the third. A fourth amplifier is inserted between the receiver (5) and the detector (8). (9) is
a pulse amplifier, which is inserted between the detector (8) and the second gate circuit (2)>, and
the second gate circuit (a) and the following relay (2) And 6 (2), in which a counting circuit ? is
inserted between them, is a clock signal generating circuit, which is connected to the control
terminal of the first gate circuit (the control end of ?The twentieth gate circuit ? ? O control
terminal is connected via the setting circuit (2).
@ The power transformer is inserted between the power supply and the ultrasonic pulse switch.
First, it is inserted between the first block including the first amplifier (4) (3) and the transmitter
(4) and the power transformer so that a high voltage is generated. Output. A third rectifier circuit
is inserted between the second block B excluding the first block A and the power transformer ?.
In FIG. The second rectifier circuit @, @ is specifically shown. The configuration of the first
rectifier circuit is as follows. C1 is a first capacitor, one end of which is connected to the cathode
terminal of the tenth diode D10 which is grounded at the anode end, and the other end of which
is connected to one end of the tertiary winding of the power transformer (2). ?? A third
capacitor has one end grounded and the other end connected to the cathode end of the second
diode D1 whose anode end is connected to the cathode end of the first diode D1. a is the output
of the rectifying circuit of the first one, said second diode D! And the second capacitor C: are
pulled out from the junction point. It is also like Mr. Akira of the 20th rectifier circuit (goods).
Osa third; one end is grounded, and the other end is connected to the third diode D30 cathode
end whose anode end is connected to the one end of the power transformer. ing. A fourth
capacitor 04 has one end grounded and the other end connected to the cathode end of the
thirtieth diode Da via a first resistor R1. b is an output end of the second rectifier circuit asO, and
is drawn out from the connection point between the first resistor R1 and the fourth capacitor C4.
The first block diagram, which comprises the first amplifier (3) and the transmitter (4), is shown
differentially in FIG. The configuration of the first amplifier (3) is as follows. The first transistor
Tri is spyII, the emitter is grounded, the base is connected via the second resistor R3, and the
second block 5Ks is connected via the third resistor R3 whose one end is grounded, the collector
Are connected to the output end a of the first rectifier circuit section via the fourth resistor R4.
Trfi is a third transistor of the spy type, and the base is connected to the collector K (6) of the
first transistor ? r1 via the sO resistor, and the collector is the output end of the eighth
rectification open circuit- It is connected to the The transistor r3 is a transistor of the column 3
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which is% PMPM1 and the emitter is connected to the emitter of the second transistor Tr, and
the pace is connected to the collector of the first transistor via the fifth resistor R. It is connected
and the collector is grounded.
OS is a fifth capacitor, and the second. It is inserted between the junction of the emitter of the
third transistor TfN * TrS and the output. Furthermore, the transmitter (4) is composed of a
vibrator whose one end is grounded and the other end is connected to the output end of the first
amplifier (3). Next, the operation of the proposal will be described. The clock signal generation
circuit (2) drives the circuit width determination-path Q4 to drive the first gate circuit (open /
close the ship. When the first gate circuit (2) is open, the output of the oscillator (1) is given to
the first amplifier (3) to perform large amplification and to be emitted from the transmitter (4)
into space. If there is an object type in the space, the outgoing signal is reflected and received by
the receiver (6) K ()), A small amplification is performed at the third amplifiers (@) and (71), and a
detection circuit (8) and a pulse amplifier (9) are provided to the second gate circuit member.
The second gate circuit aQ is opened and closed by the detection position setting circuit driven
by the clock signal generation circuit O, and when it is open, the output of the pulse amplifier (9)
is applied to the counting circuit I, and the relay To drive. The first rectifier circuit a? has a first
function: The voltage doubler rectification is performed by the second diodes DI, D, and the
rectifier circuit (2) of the power cylinder 3 performs the normal manual rectification. As
described above, in the vibrator drive circuit of the present invention, the power transformer is
connected to the power supply, and the same secondary winding of the power transformer is
connected to the first. A second block in which a second rectification circuit is connected, an
output end of the first rectification circuit is connected to a first block, and an output end of the
second rectification circuit is removed from the first block. In the first block, the amplification
degree is large and the signal is sent out to the air, and in the second block, the amplification
degree is small and the noise from the air is removed, so (8) ( (1) The structure of the (mouth)
transformer can be simplified so that the ratio can be easily improved. (3) The operation is
simple (-4 economical, etc.).
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