CN202903852U - Digital multimeter with voice prompt function - Google Patents
Digital multimeter with voice prompt function Download PDFInfo
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- CN202903852U CN202903852U CN 201220618228 CN201220618228U CN202903852U CN 202903852 U CN202903852 U CN 202903852U CN 201220618228 CN201220618228 CN 201220618228 CN 201220618228 U CN201220618228 U CN 201220618228U CN 202903852 U CN202903852 U CN 202903852U
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Abstract
The utility model discloses a digital multimeter with a voice prompt function. The digital multimeter comprises a function selector circuit, a range switching circuit, an LCD display circuit, and power supply batteries, and also comprises a one-chip microcomputer, and a crystal oscillator circuit and a reset circuit connected with the one-chip microcomputer. An input end of the one-chip microcomputer is connected with an A/D switching circuit. The function selector circuit and the range switching circuit are both connected with input ends of the A/D switching circuit. The LCD display circuit is connected with an output end of the one-chip microcomputer. The output end of the one-chip microcomputer is also connected with a voice prompt circuit used to send out voice prompt signals when misoperation of the digital multimeter occurs. The digital multimeter is simple in structure, reasonable in design, convenient in realization, low in cost, convenient in use and operation, and high in hommization degree. Damages caused by operators' incorrect use when the digital multimeter is used are prevented. The digital multimeter is high in practicality, good in use effect, and convenient in popularization and use.
Description
Technical field
The utility model relates to the measurement instrument technical field, especially relates to a kind of digital multimeter with sound prompt function.
Background technology
At present the digital multimeter used of Scientific Research in University Laboratory all adopts the method for visual reading, but not intuitively Chinese speech prompting, in actual use because the objective factor such as operator's eyesight is relatively poor or careless, easily causes maloperation and damages instrument.
The utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of digital multimeter with sound prompt function is provided, it is simple in structure, and is reasonable in design, and realization is convenient and cost is low, use simple operation, the hommization degree is high, avoided operator in use to fail correct the use and the damage that causes, and is practical, result of use is good, is convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of digital multimeter with sound prompt function, comprise function selector circuit, the range change-over circuit, LCD display circuit and supplying cell, it is characterized in that: also comprise single-chip microcomputer and the crystal oscillating circuit and the reset circuit that join with single-chip microcomputer, the input end of described single-chip microcomputer is connected to the A/D change-over circuit, described function selector circuit and range change-over circuit all join with the input end of described A/D change-over circuit, the output terminal of described LCD display circuit and described single-chip microcomputer joins, and the output terminal of described single-chip microcomputer also is connected to for the voice warning circuit that sends the voice suggestion signal when the digital multimeter generation maloperation.
Above-mentioned a kind of digital multimeter with sound prompt function is characterized in that: described single-chip microcomputer is chip AT89C52.
Above-mentioned a kind of digital multimeter with sound prompt function, it is characterized in that: described crystal oscillating circuit is made of crystal oscillator Y1, nonpolar capacitor C 1 and nonpolar capacitor C 2, one end of the end of described crystal oscillator Y1 and the pin 19 of described chip AT89C52 and nonpolar capacitor C 1 joins, the pin 18 of the other end of described crystal oscillator Y1 and described chip AT89C52 and an end of nonpolar capacitor C 2 join, the equal ground connection GND of the other end of the other end of described nonpolar capacitor C 1 and nonpolar capacitor C 2.
Above-mentioned a kind of digital multimeter with sound prompt function, it is characterized in that: described reset circuit is made of reset key S1, polar capacitor C3 and resistance R 1, the negative pole of the end of described reset key S1 and the pin 9 of described chip AT89C52, polar capacitor C3 and an end of resistance R 1 join, the anodal of the other end of described reset key S1 and polar capacitor C3 all joins the other end ground connection GND of described resistance R 1 with the output terminal VCC of described supplying cell.
Above-mentioned a kind of digital multimeter with sound prompt function is characterized in that: described A/D change-over circuit mainly is made of modulus conversion chip ADC0809.
Above-mentioned a kind of digital multimeter with sound prompt function, it is characterized in that: described LCD display circuit is by exclusion RP1, LCD LCDs 12864 and variable resistor RF1 consist of, the pin 1 of described exclusion RP1, the pin 2 of LCD LCDs 12864, pin 15, the stiff end of pin 17 and pin 19 and variable resistor RF1 all joins with the output terminal VCC of described supplying cell, the pin 2 of described exclusion RP1 and the pin 7 of LCD LCDs 12864 all join with the pin 39 of described chip AT89C52, the pin 3 of described exclusion RP1 and the pin 8 of LCD LCDs 12864 all join with the pin 38 of described chip AT89C52, the pin 4 of described exclusion RP1 and the pin 9 of LCD LCDs 12864 all join with the pin 37 of described chip AT89C52, the pin 5 of described exclusion RP1 and the pin 10 of LCD LCDs 12864 all join with the pin 36 of described chip AT89C52, the pin 6 of described exclusion RP1 and the pin 11 of LCD LCDs 12864 all join with the pin 35 of described chip AT89C52, the pin 7 of described exclusion RP1 and the pin 12 of LCD LCDs 12864 all join with the pin 34 of described chip AT89C52, the pin 8 of described exclusion RP1 and the pin 13 of LCD LCDs 12864 all join with the pin 33 of described chip AT89C52, the pin 9 of described exclusion RP1 and the pin 14 of LCD LCDs 12864 all join with the pin 32 of described chip AT89C52, the pin 3 of described LCD LCDs 12864 joins with the sliding end of variable resistor RF1, the pin 4 of described LCD LCDs 12864 joins with the pin 15 of described chip AT89C52, the pin 5 of described LCD LCDs 12864 joins with the pin 16 of described chip AT89C52, the pin 6 of described LCD LCDs 12864 joins another stiff end of described variable resistor RF1 and the pin 1 of described LCD LCDs 12864 and pin 20 equal ground connection GND with the pin 14 of described chip AT89C52.
Above-mentioned a kind of digital multimeter with sound prompt function, it is characterized in that: described voice warning circuit is made of speech chip ISD1420 and loudspeaker LS, the pin 1 of described speech chip ISD1420 joins with the pin 21 of described chip AT89C52, the pin 2 of described speech chip ISD1420 joins with the pin 22 of described chip AT89C52, the pin 3 of described speech chip ISD1420 joins with the pin 23 of described chip AT89C52, the pin 4 of described speech chip ISD1420 joins with the pin 24 of described chip AT89C 52, the pin 5 of described speech chip ISD1420 joins with the pin 25 of described chip AT89C52, the pin 6 of described speech chip ISD1420 joins with the pin 26 of described chip AT89C52, the pin 9 of described speech chip ISD1420 joins with the pin 27 of described chip AT89C52, the pin 10 of described speech chip ISD1420 joins with the pin 28 of described chip AT89C52, the pin 12 of described speech chip ISD1420, pin 13 and pin 26 equal ground connection GND, the pin 14 of described speech chip ISD1420 joins with the positive pole of described loudspeaker LS, the pin 15 of described speech chip ISD1420 joins with the negative pole of described loudspeaker LS, the pin 23 of described speech chip ISD1420 joins with the pin 17 of described chip AT89C52, and the pin 16 of described speech chip ISD1420 and pin 28 all join with the output terminal VCC of described supplying cell.
The utility model compared with prior art has the following advantages:
1, the utility model is simple in structure, and is reasonable in design, and realization is convenient and cost is low.
2, the utility model uses simple operation, owing to be provided with voice warning circuit, so the hommization degree is high.
3, the utility model has been avoided in use because with the voice suggestion alarm function, and the operator fails correct the use and the damage that causes, has guaranteed the normal service life of digital multimeter.
4, of the present utility model practical, result of use is good, is convenient to promote the use of.
In sum, the utility model is simple in structure, and is reasonable in design, and realization is convenient and cost is low, use simple operation, the hommization degree is high, has avoided operator in use to fail correct the use and the damage that causes, practical, result of use is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model single-chip microcomputer, crystal oscillating circuit, reset circuit and LCD display circuit.
Fig. 3 is the circuit theory diagrams of the utility model voice warning circuit.
Description of reference numerals:
1-function selector circuit; 2-range change-over circuit; 3-LCD display circuit;
4-supplying cell; 5-single-chip microcomputer; 6-crystal oscillating circuit;
7-reset circuit; 8-A/D change-over circuit; 9-voice warning circuit.
Embodiment
As shown in Figure 1, the utility model comprises function selector circuit 1, range change-over circuit 2, LCD display circuit 3 and supplying cell 4, it is characterized in that: also comprise single-chip microcomputer 5 and the crystal oscillating circuit 6 and the reset circuit 7 that join with single-chip microcomputer 5, the input end of described single-chip microcomputer 5 is connected to A/D change-over circuit 8, described function selector circuit 1 and range change-over circuit 2 all join with the input end of described A/D change-over circuit 8, described LCD display circuit 3 joins with the output terminal of described single-chip microcomputer 5, and the output terminal of described single-chip microcomputer 5 also is connected to for the voice warning circuit 9 that sends the voice suggestion signal when the digital multimeter generation maloperation.
In conjunction with Fig. 2, in the present embodiment, described single-chip microcomputer 5 is chip AT89C52.Described crystal oscillating circuit 6 is made of crystal oscillator Y1, nonpolar capacitor C 1 and nonpolar capacitor C 2, one end of the end of described crystal oscillator Y1 and the pin 19 of described chip AT89C52 and nonpolar capacitor C 1 joins, the pin 18 of the other end of described crystal oscillator Y1 and described chip AT89C52 and an end of nonpolar capacitor C 2 join, the equal ground connection GND of the other end of the other end of described nonpolar capacitor C 1 and nonpolar capacitor C 2.
In conjunction with Fig. 2, in the present embodiment, described reset circuit 7 is made of reset key S1, polar capacitor C3 and resistance R 1, the negative pole of the end of described reset key S1 and the pin 9 of described chip AT89C52, polar capacitor C3 and an end of resistance R 1 join, the anodal of the other end of described reset key S1 and polar capacitor C3 all joins the other end ground connection GND of described resistance R 1 with the output terminal VCC of described supplying cell 4.
In the present embodiment, described A/D change-over circuit 8 mainly is made of modulus conversion chip ADC0809.
In conjunction with Fig. 2, in the present embodiment, described LCD display circuit 3 is by exclusion RP1, LCD LCDs 12864 and variable resistor RF1 consist of, the pin 1 of described exclusion RP1, the pin 2 of LCD LCDs 12864, pin 15, the stiff end of pin 17 and pin 19 and variable resistor RF1 all joins with the output terminal VCC of described supplying cell 4, the pin 2 of described exclusion RP1 and the pin 7 of LCD LCDs 12864 all join with the pin 39 of described chip AT89C52, the pin 3 of described exclusion RP1 and the pin 8 of LCD LCDs 12864 all join with the pin 38 of described chip AT89C52, the pin 4 of described exclusion RP1 and the pin 9 of LCD LCDs 12864 all join with the pin 37 of described chip AT89C52, the pin 5 of described exclusion RP1 and the pin 10 of LCD LCDs 12864 all join with the pin 36 of described chip AT89C52, the pin 6 of described exclusion RP1 and the pin 11 of LCD LCDs 12864 all join with the pin 35 of described chip AT89C52, the pin 7 of described exclusion RP1 and the pin 12 of LCD LCDs 12864 all join with the pin 34 of described chip AT89C52, the pin 8 of described exclusion RP1 and the pin 13 of LCD LCDs 12864 all join with the pin 33 of described chip AT89C52, the pin 9 of described exclusion RP1 and the pin 14 of LCD LCDs 12864 all join with the pin 32 of described chip AT89C52, the pin 3 of described LCD LCDs 12864 joins with the sliding end of variable resistor RF1, the pin 4 of described LCD LCDs 12864 joins with the pin 15 of described chip AT89C52, the pin 5 of described LCD LCDs 12864 joins with the pin 16 of described chip AT89C52, the pin 6 of described LCD LCDs 12864 joins another stiff end of described variable resistor RF1 and the pin 1 of described LCD LCDs 12864 and pin 20 equal ground connection GND with the pin 14 of described chip AT89C52.
In conjunction with Fig. 3, in the present embodiment, described voice warning circuit 9 is made of speech chip ISD1420 and loudspeaker LS, the pin 1 of described speech chip ISD1420 joins with the pin 21 of described chip AT89C52, the pin 2 of described speech chip ISD1420 joins with the pin 22 of described chip AT89C52, the pin 3 of described speech chip ISD1420 joins with the pin 23 of described chip AT89C52, the pin 4 of described speech chip ISD1420 joins with the pin 24 of described chip AT89C52, the pin 5 of described speech chip ISD1420 joins with the pin 25 of described chip AT89C52, the pin 6 of described speech chip ISD1420 joins with the pin 26 of described chip AT89C52, the pin 9 of described speech chip ISD1420 joins with the pin 27 of described chip AT89C52, the pin 10 of described speech chip ISD1420 joins with the pin 28 of described chip AT89C52, the pin 12 of described speech chip ISD1420, pin 13 and pin 26 equal ground connection GND, the pin 14 of described speech chip ISD1420 joins with the positive pole of described loudspeaker LS, the pin 15 of described speech chip ISD1420 joins with the negative pole of described loudspeaker LS, the pin 23 of described speech chip ISD1420 joins with the pin 17 of described chip AT89C52, and the pin 16 of described speech chip ISD1420 and pin 28 all join with the output terminal VCC of described supplying cell 4.
Principle of work of the present utility model and the course of work are: carry out initialization after system powers on, then the signal of function selector circuit 1 input carried out the passage detection, and the signal that range change-over circuit 2 is inputted is carried out range detect, A/D change-over circuit 8 becomes the analog signal conversion of function selector circuit 1 with 2 outputs of range change-over circuit digital signal and exports to single-chip microcomputer 5, the signal of 5 pairs of A/D change-over circuits of single-chip microcomputer, 8 outputs carries out analyzing and processing, judge the measurement function of user selection and measure range, and control voice warning circuit 9 sends the voice suggestion signal, such as: " come in row dc voltage measurement " " come in row ac voltage measurement " " come in row dc current measurement " " come in row ac current measurement " " come in, and the row resistance is measured " " come in, and the row capacitor's capacity is measured " etc.; After the user hears voice signal, begin to measure accordingly, during measurement, described single-chip microcomputer 5 compares judgement with the measurement range of setting in measured value and single-chip microcomputer 5 internal storages, if no to scale, single-chip microcomputer 5 are just controlled the prompt tone that voice warning circuit 9 sends " no to scale please be switched gear ", if do not exceed, just control the LCD display circuit 3 normal measured values that show.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every any simple modification, change and equivalent structure of above embodiment being done according to the utility model technical spirit changes, and all still belongs in the protection domain of technical solutions of the utility model.
Claims (7)
1. digital multimeter with sound prompt function, comprise function selector circuit (1), range change-over circuit (2), LCD display circuit (3) and supplying cell (4), it is characterized in that: also comprise single-chip microcomputer (5) and the crystal oscillating circuit (6) and the reset circuit (7) that join with single-chip microcomputer (5), the input end of described single-chip microcomputer (5) is connected to A/D change-over circuit (8), described function selector circuit (1) and range change-over circuit (2) all join with the input end of described A/D change-over circuit (8), the output terminal of described LCD display circuit (3) and described single-chip microcomputer (5) joins, and the output terminal of described single-chip microcomputer (5) also is connected to for the voice warning circuit (9) that sends the voice suggestion signal when the digital multimeter generation maloperation.
2. according to a kind of digital multimeter with sound prompt function claimed in claim 1, it is characterized in that: described single-chip microcomputer (5) is chip AT89C52.
3. according to a kind of digital multimeter with sound prompt function claimed in claim 2, it is characterized in that: described crystal oscillating circuit (6) is made of crystal oscillator Y1, nonpolar capacitor C 1 and nonpolar capacitor C 2, one end of the end of described crystal oscillator Y1 and the pin 19 of described chip AT89C52 and nonpolar capacitor C 1 joins, the pin 18 of the other end of described crystal oscillator Y1 and described chip AT89C52 and an end of nonpolar capacitor C 2 join, the equal ground connection GND of the other end of the other end of described nonpolar capacitor C 1 and nonpolar capacitor C 2.
4. according to a kind of digital multimeter with sound prompt function claimed in claim 2, it is characterized in that: described reset circuit (7) is made of reset key S1, polar capacitor C3 and resistance R 1, the negative pole of the end of described reset key S1 and the pin 9 of described chip AT89C52, polar capacitor C3 and an end of resistance R 1 join, the anodal of the other end of described reset key S1 and polar capacitor C3 all joins the other end ground connection GND of described resistance R 1 with the output terminal VCC of described supplying cell (4).
5. according to claim 1 or 2 described a kind of digital multimeter with sound prompt function, it is characterized in that: described A/D change-over circuit (8) mainly is made of modulus conversion chip ADC0809.
6. according to a kind of digital multimeter with sound prompt function claimed in claim 2, it is characterized in that: described LCD display circuit (3) is by exclusion RP1, LCD LCDs 12864 and variable resistor RF1 consist of, the pin 1 of described exclusion RP1, the pin 2 of LCD LCDs 12864, pin 15, the stiff end of pin 17 and pin 19 and variable resistor RF1 all joins with the output terminal VCC of described supplying cell (4), the pin 2 of described exclusion RP1 and the pin 7 of LCD LCDs 12864 all join with the pin 39 of described chip AT89C52, the pin 3 of described exclusion RP1 and the pin 8 of LCD LCDs 12864 all join with the pin 38 of described chip AT89C52, the pin 4 of described exclusion RP1 and the pin 9 of LCD LCDs 12864 all join with the pin 37 of described chip AT89C52, the pin 5 of described exclusion RP1 and the pin 10 of LCD LCDs 12864 all join with the pin 36 of described chip AT89C52, the pin 6 of described exclusion RP1 and the pin 11 of LCD LCDs 12864 all join with the pin 35 of described chip AT89C52, the pin 7 of described exclusion RP1 and the pin 12 of LCD LCDs 12864 all join with the pin 34 of described chip AT89C52, the pin 8 of described exclusion RP1 and the pin 13 of LCD LCDs 12864 all join with the pin 33 of described chip AT89C52, the pin 9 of described exclusion RP1 and the pin 14 of LCD LCDs 12864 all join with the pin 32 of described chip AT89C52, the pin 3 of described LCD LCDs 12864 joins with the sliding end of variable resistor RF1, the pin 4 of described LCD LCDs 12864 joins with the pin 15 of described chip AT89C52, the pin 5 of described LCD LCDs 12864 joins with the pin 16 of described chip AT89C52, the pin 6 of described LCD LCDs 12864 joins another stiff end of described variable resistor RF1 and the pin 1 of described LCD LCDs 12864 and pin 20 equal ground connection GND with the pin 14 of described chip AT89C52.
7. according to a kind of digital multimeter with sound prompt function claimed in claim 2, it is characterized in that: described voice warning circuit (9) is made of speech chip ISD1420 and loudspeaker LS, the pin 1 of described speech chip ISD1420 joins with the pin 21 of described chip AT89C52, the pin 2 of described speech chip ISD1420 joins with the pin 22 of described chip AT89C52, the pin 3 of described speech chip ISD1420 joins with the pin 23 of described chip AT89C52, the pin 4 of described speech chip ISD1420 joins with the pin 24 of described chip AT89C52, the pin 5 of described speech chip ISD1420 joins with the pin 25 of described chip AT89C52, the pin 6 of described speech chip ISD1420 joins with the pin 26 of described chip AT89C52, the pin 9 of described speech chip ISD1420 joins with the pin 27 of described chip AT89C52, the pin 10 of described speech chip ISD1420 joins with the pin 28 of described chip AT89C52, the pin 12 of described speech chip ISD1420, pin 13 and pin 26 equal ground connection GND, the pin 14 of described speech chip ISD1420 joins with the positive pole of described loudspeaker LS, the pin 15 of described speech chip ISD1420 joins with the negative pole of described loudspeaker LS, the pin 23 of described speech chip ISD1420 joins with the pin 17 of described chip AT89C52, and the pin 16 of described speech chip ISD1420 and pin 28 all join with the output terminal VCC of described supplying cell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618228 CN202903852U (en) | 2012-11-20 | 2012-11-20 | Digital multimeter with voice prompt function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618228 CN202903852U (en) | 2012-11-20 | 2012-11-20 | Digital multimeter with voice prompt function |
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| Publication Number | Publication Date |
|---|---|
| CN202903852U true CN202903852U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618228 Expired - Fee Related CN202903852U (en) | 2012-11-20 | 2012-11-20 | Digital multimeter with voice prompt function |
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| CN (1) | CN202903852U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360122A (en) * | 2014-11-27 | 2015-02-18 | 哈尔滨金都太阳能科技有限公司 | Intelligent digital multimeter with voice broadcast function |
| CN110687334A (en) * | 2019-10-09 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司柳州局 | Relay protection error-proof digital multimeter |
| CN110702962A (en) * | 2019-10-29 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
-
2012
- 2012-11-20 CN CN 201220618228 patent/CN202903852U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360122A (en) * | 2014-11-27 | 2015-02-18 | 哈尔滨金都太阳能科技有限公司 | Intelligent digital multimeter with voice broadcast function |
| CN110687334A (en) * | 2019-10-09 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司柳州局 | Relay protection error-proof digital multimeter |
| CN110702962A (en) * | 2019-10-29 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
| CN110702962B (en) * | 2019-10-29 | 2021-12-17 | 中国南方电网有限责任公司超高压输电公司柳州局 | Universal meter pen of digital multimeter with anti-error measurement function |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20131120 |