CN2046221U - Ultrasonic remote control digital microammeter - Google Patents
Ultrasonic remote control digital microammeter Download PDFInfo
- Publication number
- CN2046221U CN2046221U CN 88206135 CN88206135U CN2046221U CN 2046221 U CN2046221 U CN 2046221U CN 88206135 CN88206135 CN 88206135 CN 88206135 U CN88206135 U CN 88206135U CN 2046221 U CN2046221 U CN 2046221U
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- China
- Prior art keywords
- transistor
- circuit
- terminal pin
- bcd counter
- ultrasonic
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Abstract
The utility model discloses an ultrasonic remote control digital microammeter which overcomes the problem that the common digital meter which is in high potential in an electric power system is operated unsafely when the digital meter measures. The ultrasonic remote control digital microammeter is characterized in that the digital meter is provided with an ultrasonic remote control circuit which comprises two portions, a first portion which is an ultrasonic emission circuit which comprises a transistor oscillator, an emitter follower and a power amplifier, and a second portion which is an ultrasonic receiving control circuit which is provided with a piezoelectric transducer for receiving ultrasonic and the BCD counter of an integrated circuit. The piezoelectric transducer and the BCD counter are connected by a frequency-select amplifying circuit and a shaping circuit.
Description
This practicality newly belongs to the improvement of digital little table.
Before the utility model is made, introduced a kind of several seed voltage table in that " electric automatization " magazine 1984 the 4th is interim, this table is made up of 5 integrated circuit blocks and LED charactron, wherein, 5 integrated circuit blocks 3 1/2 A/D converters, the seven-segment decoder of depositing with lock, double D trigger, digital selector switch and the energy gap voltage source of reference voltage is provided respectively.Utilize this instrument directly to measure equipment voltage or dc leakage-current in the electric system because digital watch often is in hot end, in the process of reading, switching range, must first deenergization, therefore, use inconvenient, also safety inadequately.The utility model is at this problem, has done further improvement on the basis of above-mentioned digital voltmeter, thereby a kind of control switching range that shakes is provided, and latchs the digital microampere meter of measurement data.
Main points of the present utility model are, on above-mentioned digital voltmeter, set up ultrasound wave and shake control circuit, this circuit is divided into two parts: first is a ultrasonic transmit circuit, it is provided with the transistor oscillator that two transistors are formed, its output terminal is connected to one-level wealth utmost point follower, output terminal at emitter-follower is connected to a stage power amplifier, and its load is made up of coupling transformer and ultrasound piezoelectric transducer; Second portion is that ultrasound wave receives, control circuit, and this circuit is provided with one and accepts hyperacoustic piezoelectric transducer and the BCD counter that integrated circuit is formed, and is connected to frequency-selecting amplifier and shaping amplification circuit between the two.Described BCD counter contains 16 terminal pins, this circuit only adopts 10 terminal pins, wherein, the 16th terminal pin connects power supply, 8th, the 13rd terminal pin ground connection, the 1st, the 15th terminal pin is used for zero clearing and resets, and the 14th terminal pin is the input end of count pulse, 10th, the signal exported of the the 4th, the 7, the 3rd terminal pin range conversion and the measurement data that are respectively applied for the control figure table latchs.The utility model has the advantages that compact conformation, safe and reliable, can in 6 meters scope, realize shaking the range conversion of controlling digital watch, measurement data latchs.
The utility model is described in further detail below in conjunction with accompanying drawing.Fig. 1 is a ultrasonic transmit circuit, and Fig. 2 is that ultrasound wave receives, control circuit figure, and Fig. 3 is the block scheme of digital watch.
As Fig. 1, Fig. 2, shown in Figure 3, press power switch (1), digital watch and ultrasound wave receive, the public power of control circuit, (2) are switched on, at this moment, because BCD counter (3) is energized also, power supply is the 16th terminal pin (Y that adds to the BCD counter by resistance (4)
16), simultaneously, power supply is through resistance (5), and electric capacity (6) adds to the 15th terminal pin (Y of BCD counter
15), the BCD counter O reset is resetted, at this moment, counter the 6th pin (Y
8) the output high level, making transistor (7) conducting, transistor (8) ends, and through resistance (9), makes the transistor (11) can not conducting, and digital watch can not get.When pressing power switch (12), the power supply of ultrasonic transmit circuit (13) is switched on, at this moment, by two transistors (14,15), electric capacity (16,17,18), resistance (19,20,21), transistor oscillator (22) starting of oscillation that inductance (L) is formed, output signal is through crystal management (23), the emitter-follower (25) that resistance (24) is formed, add to by transistor (26), on the power amplifier (28) that resistance (27) is formed, its amplifying signal makes ultrasound piezoelectric transducer (30) to the space radiation acoustic signals by transformer (29) coupling, after receiving ultrasonic piezoelectric transducer (31) and receiving signal, through transistor (32,33), resistance (34,35,36,37), electric capacity (38,39,40,41,42,43), the frequency-selecting amplifier (45) that inductance (44) is formed amplifies, again by diode (46,47), electric capacity (48,49), resistance (50,51,52,53,54,55), transistor (56,57) shaping circuit of Zu Chenging (A) shaping, collector at transistor (57) is drawn trigger pip as counter pulse, is input to the 14th terminal pin (Y of BCD counter (3)
14), at this moment, the 3rd terminal pin (Y
3) output low level, form phase inverter through transistor (7) and resistance (58), transistor (8) is ended, digital watch gets electric, and simultaneously, digital watch is measured under the lower range situation.Tested electric signals is input in 3 1/2 A/D converters (62) of digital watch through relay normally closed contact (59), resistance (60), electric capacity (61) by input end (sr).(among the figure, UX is the link of measured signal incoming line).The data of converter (62) output, through seven-segment decoder (63), nixie (64) each section anode that the luminous utmost point pipe of driving LED is formed, and the public anode of each figure place is driven by digital selector switch (65), the data that make converter (62) output show with the form of numeral.The reference voltage of converter (62) adds to converter (62) by digital watch power supply (E) through an energy gap voltage source (66) and resistance (67).The overrange of digital watch is reported to the police and is controlled by double D trigger (D).
When pressing the power switch (12) of ultrasonic transmit circuit for the second time, BCD counter (3) is received second count pulse, its 4th terminal pin (Y
4) the output high level, make transistor (69) conducting through resistance (68), pass through diode (70) again, add to the latch signal input end (DU) of A/D converter (62), at this moment, the digital watch data presented can remain unchanged.
When pressing power switch (12) for the third time, BCD counter (3) is received the 3rd count pulse, its 7th terminal pin (Y
7) the output high level, make transistor (72) conducting through resistance (71), again through diode (73), resistance (74), make transistor (75) conducting, relay (76) electric, its normally opened contact (77) is connected, simultaneously tested electric signals by input end (sr) through resistance (78), relay normally open contact (77), resistance (60), electric capacity (61) are input in the A/D converter (62) of digital watch, and digital watch is measured under the high range situation.
When pressing power switch (12) the 4th time, BCD counter (3) is received the 4th count pulse, its 10th terminal pin (Y
10) the output high level, on-off circuit through resistance (79), transistor (80) composition, through diode (81), make control signal add to the latch signal input end (DU) of A/D converter (62) again, the high range metric data that this moment, digital watch showed remains unchanged.
When pressing power switch (12) the 5th time, BCD counter (3) is received the 5th count pulse, its 1st terminal pin (Y
1) the output high level, introduce the 15th terminal pin (Y through diode (82)
15), BCD counter (3) zero clearing is resetted, simultaneously, the 3rd terminal pin (Y
3) also export high level, transistor (7) conducting once more, the delay circuit of forming through resistance (83,84), electric capacity (85) ends transistor (8), and digital watch power supply (E) turn-offs voluntarily through one section delay time.
Claims (1)
- A kind of ultrasound wave shakes the digital microampere meter of control, it is made up of 5 integrated circuit blocks and LED charactron (64), wherein, 5 integrated circuit blocks are respectively 3 1/2 A/D converters (62), seven-segment decoder (63), double D trigger (D), digital selector switch (65) and the energy gap voltage source (66) that reference voltage is provided, feature of the present utility model is, described microampere meter is provided with ultrasound wave and shakes control circuit, and this circuit is made up of two parts; First is a ultrasonic transmit circuit, sort circuit is provided with two transistors (14,15) oscillator of Zu Chenging (22), in oscillator, the base stage of the first transistor (14) links to each other with the emitter of transistor seconds (15) by-telefault, the emission of the first transistor (14) is the output terminal of oscillator very, this output terminal is connected to the emitter-follower (25) that one-level is made up of transistor (23), the output terminal of emitter-follower links to each other with a stage power amplifier (28) by a resistance (27), the collector of forming the transistor (26) of power amplifier (28) is connected to a coupling transformer (29), is connected to an emission hyperacoustic piezoelectric transducer (30) coupling transformer marginal; Second portion is that ultrasound wave receives, control circuit, and this circuit is provided with one and receives only hyperacoustic piezoelectric transducer (31), a BCD counter (3) of forming by integrated circuit, wherein, the 8th and the 13rd terminal pin (Y of BCD counter (3) 8, Y 13) ground connection, the 16th terminal pin (Y 16) connect power supply (2), the 1st terminal pin (Y 1) by a diode (82) and the 15th terminal pin (Y 15) link to each other the 3rd terminal pin (Y 3), the 4th terminal pin (Y 4), the 7th terminal pin (Y 7) and the 10th terminal pin (Y 10) link to each other the 14th terminal pin (Y with four transistors (7,69,72,80) respectively 14) be the count pulse input end of BCD counter; One end ground connection of described ultrasound piezoelectric transducer (31), the other end and frequency-selecting amplifier (45) join, this frequency-selecting amplifier (45) is provided with two transistors (32,33), wherein, the base stage of a transistor (32) is a signal input part, the current collection of another transistor (33) is the output terminal of frequency-selecting amplifier (45) very, this output terminal and shaping amplification circuit (A) join, in shaping amplification circuit, also be provided with two transistors (56,57), wherein, the base stage of the collector of first transistor (56) and second transistor (57) is joined, and the collector of second transistor (57) and the count pulse input end of BCD counter join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206135 CN2046221U (en) | 1988-05-23 | 1988-05-23 | Ultrasonic remote control digital microammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88206135 CN2046221U (en) | 1988-05-23 | 1988-05-23 | Ultrasonic remote control digital microammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2046221U true CN2046221U (en) | 1989-10-18 |
Family
ID=4840390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88206135 Withdrawn CN2046221U (en) | 1988-05-23 | 1988-05-23 | Ultrasonic remote control digital microammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2046221U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105283778A (en) * | 2013-06-03 | 2016-01-27 | 罗伯特·博世有限公司 | Ultrasonic transmission and reception apparatus |
-
1988
- 1988-05-23 CN CN 88206135 patent/CN2046221U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105283778A (en) * | 2013-06-03 | 2016-01-27 | 罗伯特·博世有限公司 | Ultrasonic transmission and reception apparatus |
| US9958538B2 (en) | 2013-06-03 | 2018-05-01 | Robert Bosch Gmbh | Ultrasonic transmission and reception device |
| CN105283778B (en) * | 2013-06-03 | 2020-05-05 | 罗伯特·博世有限公司 | Ultrasonic transmitting and receiving device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |