CN2187797Y

CN2187797Y - Digital display and automatic speech sound multimeter

Info

Publication number: CN2187797Y
Application number: CN 94215555
Authority: CN
Inventors: 杨跃华
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-09
Filing date: 1994-06-09
Publication date: 1995-01-18
Anticipated expiration: 2004-06-09

Abstract

The utility model relates to a compact type automatic voice number-off multimeter which is formed by that an ordinary three-position half multimeter and a voice processing system comprising a microprocessor, a voice ROM, a voice synthesizer, a power amplifier, a data acquisition buffer, a converting integrated package 74HC148, a standard crystal oscillator and a loud speaker; the input terminal of a data acquisition unit is connected with the liquid crystal display of the multimeter; the output terminal of the data acquisition unit is connected with a chip TSG04. The utility model which can avoid that troubles caused by that a measuring person needs to do tests and to watch meters with eyes at the same time, increasing the work efficiency, can be widely used for the measurement of direct-current circuits and alternating-current circuits.

Description

Digital display and automatic speech sound multimeter

The utility model belongs to calculating, language analysis and speech recognition field, definitely says, this case relates to a kind of numeral demonstration and automatic speech reporting is counted multimeter.

In the prior art, normally used multimeter, the general biproduct mode A/D that adopts changes, input simulated the comparison of signal and reference voltage, compare with zero potential again behind the quadratic integral, result relatively promotes 7106LCD and shows test results by the control signal of 7105 chips as digital circuit.The shortcoming of this multimeter is a manual manipulation when measuring, and needs eyes to watch simultaneously, causes the inconvenience in the use, and application limitation limited (for example the blind person uses).

For overcoming shortcoming of the prior art, test result can numeral be shown the multimeter of automatic speech count off again but the purpose of this utility model is to provide a kind of.

For achieving the above object, the utility model adopts following technical scheme to be achieved.In this scheme, utilize existing common three and half multimeters, add speech processing system, constitute the utility model.

Below in conjunction with drawings and Examples, further illustrate the utility model structure and line work principle thereof.

Accompanying drawing 1 is the block scheme of speech processing system

Accompanying drawing 2 is the utility model speech processes wiring diagram

Accompanying drawing 3 is the utility model appearance assumption diagram.

In the accompanying

drawing

1,1 is the utility model peripheral hardware accessory, comprise the silicon crystal triode of the input resistance that inputs in the certain chip, standard crystal oscillator, promotion loudspeaker and connect circuit accordingly, 2 is specific special chip TSG04, altogether by four most of compositions, wherein comprise microprocessor, voice ROM, voice operation demonstrator, power amplifier.3 is data buffer, and 4 is conversion integration block 74HC148, is for toggle switch K ₃Eight lines inputs convert the needed three-way input of special chip TSG04 to by 74HC148.

Accompanying drawing 2 is the utility model speech processing system schematic circuit, comprises the accessory in data buffer and the accompanying drawing 1.In this annex, the decimal in the data buffer, individual position, ten, hundred, kilobit and negative pressure all adopt the 74HC273 integrated package.In this assembly, H-BUS, T-BUS, Y-BUS input end connect with multimeter 7106 in the prior art respectively, and the output terminal of each integrated package connects with each leading foot of special chip TSG04 respectively, and they are respectively hundred of H-BUS() output terminal 1-7 respectively with chip TSG04 H ₁-H ₇Link to each other P among the 74HC2731 and chip P ₃End links to each other; Ten of T-BUS() P and chip P ₂End links to each other; Output terminal 1-7 respectively with chip T ₁-T ₇Connect; U-BUS(position) P and chip P ₁Link to each other, output terminal 1-7 respectively with chip U ₁-U ₇Link to each other; Y-BUS(decimal, positive and negative, kilobit, negative pressure) P and chip P ₄Link to each other, output terminal 1-4 respectively with chip BP ₄, LP _5,6,7Link to each other.Chip REP is by memory repeat key AN ₂Ground connection.Chip TALK is by speech trigger key AN ₁Be connected with positive source.The 32.768KHZ signal that the standard crystal oscillator produces is connected to chip 4,5(OSC23 and OSC3), chip OSC1 connects positive source by resistance.6 pin AUDO of chip link to each other with voice button one terminal contacts by resistance, and another contact of voice button links to each other with the silicone tube base stage, and this transistor collector connects loudspeaker one end, another termination positive source of loudspeaker.Voice button fixed contact ground connection.

Whole devices in the above-mentioned electrical schematic diagram all are installed in three independently on the double-sided wiring board, and stack together, adopt the standard connector to link up between corresponding.Topmost two wiring boards constitute the DT890B multimeter, can independently use, and the lowermost layer wiring board is a speech processor.But automatic number-sounding.Whole circuit is installed in as shown in Figure 3 the housing (separate case application) and 1 is housing in accompanying

drawing

3, and 2 is loudspeaker, and 3 is display screen, 4 is toggle switch, and 5 is test pencil patchhole (test pencil separate case application), and 6 is interface, 7 for repeating memory button, 8 is the voice button, and 9 is the electric capacity socket, and 10 is the triode socket, 11 for surveying high-current switch, 12 are earphone patchhole (can be with earphone to listen the voice count off), and 13 is two test pencils of multimeter, and 14 is the speech trigger key.

Introduce its principle of work below: during use, with the multimeter test pencil signal-under-test is measured, measurement result becomes digital signal by the multimeter in the prior art, come out by liquid crystal display displays, this measuring-signal is input to data buffer by bus and carries out delivering to chip TSG04 behind the acquisition buffer and handle on the other hand, microprocessor carries out series of processes to these data: positive-negative polarity, size of data, scaling position is judged, the establishment of measuring unit, after these work are finished, among voice ROM, extract corresponding voice messaging according to a definite sequence again, become a complete voice broadcast after the voice operation demonstrator conversion and come out, this a series of processing procedure is very of short duration for people's ear.

22 seconds language of voice ROM internal storage, its content be 11 ten, one hundred, thousand, zero, to ask gear shift, Ω, K Ω, million Ω, enlargement factor be 24 sections voice such as mv, v, mI, I for short circuit, no to scale.These voice contents are to deposit by certain sequence of addresses, are read in certain sequence by CPU during measurement, have just become graceful voice.

Implement the utility model, not only enlarge the usable range of multimeter, increase work efficiency, the while also can be avoided the unit under test short circuit and cause various danger.The utility model overall dimensions are very little, and are in light weight, except that tool use value, are again the artistic grades that is rich in of a pocket, make us pleasing test instrumentation.

Claims

The multimeter of a kind of numeral demonstration and automatic speech count off, it is characterized in that the automatic speech disposal system is made up of special chip TSG04, data buffer, peripheral hardware accessory, conversion integration block, wherein hundred, ten of data buffers, individual position, decimal, positive and negative, kilobit, negative pressure input end link to each other with 7106 respectively, and output terminal is by data bus and chip TSG04H ₁-H ₇, T ₁-T ₇, U ₁-U ₇,
, L _5,6,7Link to each other, the conversion integration block input end links to each other with toggle switch, its output terminal respectively with chip TSG04S ₁, S ₂, S ₃Connect, REP is by memory repeat key AN among the chip TSG04 ₂Ground connection, chip TALK end is by speech trigger key AN ₁Be connected with positive source, crystal oscillator links to each other with chip OSC2 (4), OSC2 (5) end, and chip AUDO (6) end connects with loudspeaker with voice button, triode by resistance.