CN201392356Y - Digital oscilloscope - Google Patents
Digital oscilloscope Download PDFInfo
- Publication number
- CN201392356Y CN201392356Y CN200920145388U CN200920145388U CN201392356Y CN 201392356 Y CN201392356 Y CN 201392356Y CN 200920145388 U CN200920145388 U CN 200920145388U CN 200920145388 U CN200920145388 U CN 200920145388U CN 201392356 Y CN201392356 Y CN 201392356Y
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- digital conversion
- end conditioning
- conditioning module
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Abstract
The utility model provides a digital oscilloscope, which comprises a housing provided with a top surface, a bottom surface and a front surface and a circuit board arranged in the housing, wherein the circuit board is provided with a first front end conditioning module, a second front end conditioning module, an analog-to-digital conversion module and a control module, both the first and the second front end conditioning modules are connected to the analog-to-digital conversion module connected with the control module, the circuit board is parallel to the front surface, both the first and the second front end conditioning modules are arranged parallel to the bottom surface of the housing, and the analog-to-digital conversion module is arranged on the side of the two front end conditioning modules approaching the top surface thereof. The error of the measured data of the digital oscilloscope is relatively small.
Description
Technical field
The utility model relates to the electric variable measurement field, particularly relates to a kind of digital oscilloscope.
Background technology
Digital oscilloscope (DSO) is a kind of advanced surveying instrument that developed recently gets up.Compare with traditional analog oscilloscope, digital oscilloscope has lot of advantages, can carry out waveform storage, fast fourier transform or the like as digital oscillograph.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the perspective view under a kind of traditional digital oscilloscope assembled state, and Fig. 2 is the perspective view under the digital oscilloscope decomposing state shown in Figure 1.This digital oscilloscope 1 comprises a shell 10 and a main circuit board 20 that is contained in shell 10 inside.This shell 10 is rectangular shape, and comprises a front 11, back side 12, end face 13, bottom surface 14, a left surface 15 and a right flank 16.The panel of this digital oscilloscope 1 (indicating) is arranged on front 11, and this panel comprises display panel 18 and guidance panel 19.Because the continuous increase of the various functions of digital oscilloscope, this panel need occupy bigger area usually and show more information and more operation push-button is provided, so the area at the front 11 of shell 10 and the back side 12 is usually greater than the area of end face 13, bottom surface 14, left surface 15 and right flank 16.In other words, if represent the length of digital oscilloscope 1 with L, represent with W wide, represent with H high, L＞H＞W so generally speaking.This main circuit board 20 closes on and is parallel to bottom surface 14 and is provided with.
Please refer to Fig. 3, Fig. 3 is position of components and the annexation synoptic diagram on the main circuit board of digital oscilloscope shown in Figure 2.Main circuit board 20 is provided with one first front end conditioning module 21, one second front end conditioning module 22,23, clock module of analog-to-digital conversion module (ADC) 24, a control module 25 and a microprocessor 26.In this first, second front end conditioning module 21,22 each be used to receive one road input signal and the input signal conditioning that will receive separately to the level range that is fit to sampling.This analog-to-digital conversion module 23 is used for the signal after nursing one's health through first, second front end conditioning module 21,22 is sampled, and exports with digital signal.This control module 25 is used for the digital signal that this analog-to-digital conversion module 23 is exported is carried out various processing, as Fourier transform etc.Microprocessor 26 is used to receive the data of control module 25, and data-switching is become the video data be suitable for showing.Clock module 24 provides clock signal for analog-to-digital conversion module 23.In this first, second front end conditioning module 21,22 each all comprises an input interface (BNC) 29, be used for outside joint (figure does not show) to fetching receiving inputted signal.
Please refer to Fig. 4, Fig. 4 is the spatial structure enlarged diagram of input interface shown in Figure 2.One end of this input interface 29 is Plug Division 291, and the other end is a pin two 92.Because main circuit board 20 is perpendicular to front 11, so the rectangular shape of pin two 92 bendings of this input interface 29.By pin two 92 ends are fixed on the main circuit board 20, can so that input interface 29 be used to connect Plug Division 291 expose from the front 11 of this shell 10 by through hole 295.
Because this main circuit board 20 is parallel to bottom surface 14, so its area is subjected to bottom surface 14 area constraints and very limited.Wait harmful effect owing to need to leave necessary distance between the module to prevent interference again, therefore, two front end conditioning module 21,22, analog-to-digital conversion module 23 and control modules 25 can not broad ways (being the Width W of digital oscilloscope 1) be provided with under the restriction of these main circuit board 20 width in regular turn, and (being the length direction L of digital oscilloscope 1) is provided with along its length.
Equally, because being parallel to bottom surface 14, main circuit board 20, consider that two input interfaces 29 need be positioned at shell 10 fronts, so this first, second front end conditioning module 21,22 needs also along the 20 length direction settings of this main circuit board perpendicular to front 11.
But, because this is first years old, the second front end conditioning module 21,22, analog-to-digital conversion module 23 and control module 25 are all along main circuit board 20 length direction settings, therefore this can to cause the first front end conditioning module 21 to be connected to the length of the length of lead of analog to digital conversion 23 and the lead that the first front end conditioning module 22 is connected to analog to digital conversion 23 unequal, it is inconsistent with the time that signal by 22 inputs of the second front end conditioning module arrives analog-to-digital conversion module 23 promptly to arrive the time of analog-to-digital conversion module 23 by the signal of the first front end conditioning module 21 input, and then cause first, the second front end conditioning module 21, the sampled point of 22 input signals is inconsistent, and the error that finally shows as measurement data is bigger.
In addition, because the rectangular shape of pin two 92 bendings of this input interface 29, by pin two 92 ends are fixed on the main circuit board 20, can so that input interface 29 be used to connect Plug Division 291 expose from the front 11 of this shell 10, so the plug direction of this input interface 29 is parallel to this main circuit board 20.For a long time along the stressed right angle part fracture that causes these input interface 29 pin twos 92 easily of this direction, perhaps input interface 29 becoming flexible on this main circuit board 20.
The utility model content
In order to solve the bigger problem of conventional digital oscilloscope measurement data error, the utility model provides a kind of measurement data error less digital oscilloscope.
A kind of digital oscilloscope, comprise that has an end face, bottom surface and positive shell and circuit board that is arranged in the described shell, has one first front end conditioning module on the described circuit board, one second front end conditioning module, an analog-to-digital conversion module and a control module, the described first front end conditioning module and the second front end conditioning module all are connected to described analog-to-digital conversion module, described analog-to-digital conversion module is connected to described control module, described circuit board is parallel to described front, described first front end conditioning module and the described second front end conditioning module are parallel to described bottom surface arranges, and described analog-to-digital conversion module is arranged on the side of described two front end conditioning module near described end face.
In the middle of a better embodiment, the analog-to-digital conversion module in the digital oscilloscope of the present utility model be arranged on described two front end conditioning module directly over.
In the middle of a better embodiment, control module in the digital oscilloscope of the present utility model is field programmable gate array (Field-Programmable Gate Array, FPGA), CPLD (Complex Programmable Logic Device, CPLD) etc.
Digital oscilloscope of the present utility model is because circuit board is parallel to the outer casing frontispiece setting, make width of circuit board increase, and then analog-to-digital conversion module can be arranged on the side of described two front end conditioning module near described end face, make the less of analog-to-digital conversion module to two a front end conditioning module apart from difference, and then feasible more consistent to the sampled point of two front end conditioning module input signals, so the error of measurement data is less.
In addition, the utility model also provides another measurement data error less digital oscilloscope.
A kind of digital oscilloscope, comprise that has an end face, bottom surface and positive shell and circuit board that is arranged in the described shell, has one first front end conditioning module on the described circuit board, one second front end conditioning module, one first analog-to-digital conversion module, one second analog-to-digital conversion module, one first control module, one second control module and a clock module, the described first front end conditioning module, first analog-to-digital conversion module links to each other in regular turn with first control module, the described second front end conditioning module, second analog-to-digital conversion module links to each other in regular turn with second control module, described clock module is connected to described first analog-to-digital conversion module and second analog-to-digital conversion module, described circuit board is parallel to described front, described first front end conditioning module and the described second front end conditioning module are parallel to the shell bottom surface and arrange, the described first front end conditioning module, the close gradually in regular turn described outer casing top surface setting of first analog-to-digital conversion module and first control module, the described second front end conditioning module, second analog-to-digital conversion module and second control module are in regular turn gradually near described outer casing top surface setting.
Digital oscilloscope of the present utility model is because circuit board is parallel to the outer casing frontispiece setting, make width of circuit board increase, and then two analog-to-digital conversion modules can be arranged on the side of described two front end conditioning module near described end face, make two analog-to-digital conversion modules arrive the less of corresponding front end conditioning module apart from difference, and then feasible more consistent to the sampled point of two front end conditioning module input signals, so the error of measurement data is less.
Description of drawings
Fig. 1 is the perspective view under a kind of traditional digital oscilloscope assembled state.
Fig. 2 is the perspective view under the digital oscilloscope decomposing state shown in Figure 1.
Fig. 3 is position of components and the annexation synoptic diagram on the main circuit board of digital oscilloscope shown in Figure 2.
Fig. 4 is the spatial structure enlarged diagram of input interface shown in Figure 2.
Fig. 5 is the perspective view under the assembled state of the utility model digital oscilloscope one better embodiment.
Fig. 6 is that digital oscilloscope shown in Figure 5 is partly disassembled the perspective view under the state.
Fig. 7 is a digital oscilloscope integrated circuit module diagram shown in Figure 5.
Fig. 8 is that the position of part of module shown in Figure 7 on this main circuit board concerns synoptic diagram.
Fig. 9 is the enlarged diagram of the structure of input interface shown in Figure 6.
Embodiment
Please together with reference to Fig. 5 and Fig. 6, Fig. 5 is the perspective view under the assembled state of the utility model digital oscilloscope one better embodiment, and Fig. 6 is that digital oscilloscope shown in Figure 5 is partly disassembled the perspective view under the state.This digital oscilloscope 2 comprises a shell being combined by a fore shell 211 and back cover 212 210, main circuit board 220, display screen 250, a plurality of button 260, a plurality of knob 261 and a button circuit board (figure does not show).
These shell 210 integral body are rectangular shape, and comprise a front 213, back side 214, end face 215, bottom surface 216, end face 217 and two sides (indicating).The length that the line segments that form are digital oscilloscope 2 (using L ' expression) is intersected with bottom surface 216 in front 213, wide (the using W ' expression) that the line segment that forms is a digital oscilloscope 2 intersected in side and bottom surface 216, and the height that the line segment that forms is a digital oscilloscope 2 (using H ' expression) is intersected with the side in front 213.Wherein, positive 213 area is greater than the area of bottom surface 216, i.e. H '＞W '.
The front 213 of this shell 210 has a display window 218, a plurality of button knob through hole (figure does not show) and a plurality of port through hole 219.Display window 218 is an opening that is square, and according to most of users' custom it is arranged on positive 213 left side.Display screen 250 corresponding display windows 218 are arranged on shell 210 inner and next-door neighbours positive 213.These a plurality of button knob through holes are distributed in positive 213 right side, to meet the custom that majority's right hand is a handedness.A plurality of port through holes 219 are distributed in positive 213 downside, block button 260 or knob 261 to prevent external signal line.This button circuit board is fixed on shell 210 with interior and close on positively 213, and this button 260 and knob 261 1 ends are installed on this button circuit board, and the other end extends by this button knob through hole respectively that to be exposed to shell 210 outer so that operation.
This main circuit board 220 is parallel to the front and is arranged in the shell 210.
Please refer to Fig. 7, Fig. 7 is a digital oscilloscope integrated circuit module diagram shown in Figure 5.This main circuit board 220 is provided with one first front end conditioning module 221, one second front end conditioning module 222, one the 3rd front end conditioning module 223, one the 4th front end conditioning module 224, one first analog-to-digital conversion module 225, one second analog-to-digital conversion module 226, clock module 227, one first control module 228, one second control module 229, microprocessor 230, a D/A converter module 231 and a memory module 232.
This is first years old, the second front end conditioning module 221,222 are connected to first analog-to-digital conversion module 225, the 3rd, the 4th front end conditioning module 223,224 are connected to second analog-to-digital conversion module 226, first analog-to-digital conversion module 225 is connected to first control module 228, second analog-to-digital conversion module 226 is connected to second control module 229, first, second control module 228,229, any two between microprocessor 230 and the memory module 232 all are connected, D/A converter module 231 is connected to second control module 229 and first to fourth front end conditioning module 221～224, and clock module 227 is connected to first, second analog-to-digital conversion module 225,226, first, second control module 228,229 and microprocessor 230.This microprocessor 230 is also connected to a display module (not indicating), an interface module (not indicating) and a load module (not indicating).
This first to fourth front end conditioning module 221～224 is used to receive first to fourth road input signal, and the input signal conditioning that will receive separately is output as analog waveform signal to the level range that is fit to sampling.
First, second analog-to-digital conversion module 225,226 is used for this analog waveform signal is sampled, and exports with digital waveform signal.This first analog-to-digital conversion module 225 comprises one first analog to digital conversion circuit (figure does not show) and one second analog to digital conversion circuit (figure does not show), this first analog to digital conversion circuit is used for the analog waveform signal of the first front end conditioning module, 221 outputs is sampled, and this second analog to digital conversion circuit is used for the analog waveform signal of the second front end conditioning module, 222 outputs is sampled.Similarly, this second analog-to-digital conversion module 226 also comprises two analog to digital conversion circuits, one is used for the analog waveform signal of the 3rd front end conditioning module 223 outputs is sampled, and another is used for the analog waveform signal of the 4th front end conditioning module 224 outputs is sampled.
228,229 pairs of digital waveform signal of first, second control module are carried out data processing, as Fourier transform, drafting lissajouf figure etc.First, second control module 228,229 can be field programmable gate array (Field-Programmable Gate Array, FPGA), CPLD (ComplexProgrammable Logic Device, CPLD) etc.
D/A converter module 231 is used for producing various aanalogvoltages and offers first to fourth front end conditioning module 221～224 under the control of first, second control module 228,229.
Please together with reference to Fig. 6 to Fig. 8, Fig. 8 is that the position of part of module shown in Figure 7 on this main circuit board concerns synoptic diagram.Because this main circuit board 220 is parallel to the front and is arranged in the shell 210, so the length direction 1 of main circuit board 220 is identical with the length direction L ' of digital oscilloscope 2, the Width w of main circuit board 220 is identical with the high length direction H ' of digital oscilloscope 2.Corresponding with a plurality of port through holes 219 of the downside that is distributed in front 213, this first to fourth front end conditioning module 221～224 is arranged at the side of this main circuit board 220 near bottom surface 216, and makes this first to fourth front end conditioning module 221～224 be parallel to this bottom surface 216 along the arrangement of main circuit board 220 length directions.Each front end conditioning module in the first to fourth front end conditioning module 221～224 all comprises an input interface 239 and a trigger module 236.This input interface 239 be used for outside joint (figure does not show) to fetching receiving inputted signal, this trigger module 236 is used for triggering when 239 input signals of input interface of correspondence satisfy the trigger condition of setting.
Please refer to Fig. 9, Fig. 9 is the structure enlarged diagram of input interface shown in Figure 6.One end of this input interface 239 is Plug Division 237, and the other end is a pin two 38.Because main circuit board 220 is parallel to front 213, so the pin two 38 of this input interface 239 need not bending for rectilinear form.Be fixed on the main circuit board 220 by end pin two 38, can so that input interface 239 be used to connect Plug Division 237 expose from the front 213 of this shell 210.
This first, second analog-to-digital conversion module 225,226 is arranged on the side (promptly be positioned at first to fourth front end conditioning module 221～224 tops) of this first to fourth front end conditioning module 221～224 near end face 217.Preferably, first analog-to-digital conversion module 225 makes the analog-to-digital conversion module 225 of winning equate to the distance between first, second front end conditioning module 221,222 along the perpendicular bisector setting of the first front end conditioning module 221 and the second front end conditioning module, 222 lines of centres.Similarly, second analog-to-digital conversion module 226 makes that along the perpendicular bisector setting of the 3rd front end conditioning module 223 and the 4th front end conditioning module 224 lines of centres distance between second analog-to-digital conversion module 226 to the 3rd, the 4th front end conditioning module 223,224 equates.And the length of lead that length and the second front end conditioning module 222 that the first front end conditioning module 221 is connected to the lead of first analog to digital conversion circuit 225 is connected to first analog to digital conversion circuit 225 is identical.The length of lead that length and the 4th front end conditioning module 224 that the 3rd front end conditioning module 223 is connected to the lead of second analog to digital conversion circuit 226 is connected to second analog to digital conversion circuit 226 is identical.
In addition, another difference of the utility model and prior art also is: first control module 228 is arranged on first analog-to-digital conversion module 225 near end face 217 1 sides, second control module 229 is arranged on second analog-to-digital conversion module 226 near end face 217 1 sides, be that first, second analog-to-digital conversion module 225,226 is arranged on first to fourth front end conditioning module, 221～224 tops, first, second control module 228,229 is arranged on first, second control module 228,229 tops.Generally speaking, this first, second analog-to-digital conversion module 225,226 is owing to be high speed device, and thermal value is maximum comparatively speaking; Radiator fan owing to digital oscilloscope inside all is installed in the middle part again, therefore first, second analog-to-digital conversion module 225,226 is arranged on to help heat radiation between first to fourth front end conditioning module 221～224 and first, second control module 228,229.
And control module (as FPGA, CPLD) belongs to large scale integrated circuit, and thermal value is generally also bigger.And the hot-air accumulation causes analog-to-digital conversion module to produce the thermonoise equal error easily, influences the accuracy of analog-to-digital conversion module sampling.Because first, second control module 228,229 of the present utility model is positioned at the top of first, second analog-to-digital conversion module 225,226, be difficult for moving downward by easier the moving upward of hot-air of first, second control module 228,229 generations, therefore hot-air is less to the influence of first, second analog-to-digital conversion module 225,226, and then the error of digital oscilloscope 2 measurement data of the present utility model is further reduced.
Moreover the another difference of the utility model and prior art also is: the pin two 38 of this input interface 239 need not bending.This makes this input interface 239 and outside joint be subjected to force direction perpendicular to main circuit board 220 in the plug process, and then makes the pin two 38 of this input interface 239 be not easy to damage, and input interface 239 is difficult for loosening with respect to main circuit board 220.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model all should be as the criterion with the protection domain of claim.
Claims (10)
1. digital oscilloscope comprises:
One have end face, bottom surface and positive shell and
A circuit board that is arranged in the described shell, have one first front end conditioning module, second a front end conditioning module, an analog-to-digital conversion module and a control module on the described circuit board, the described first front end conditioning module and the second front end conditioning module all are connected to described analog-to-digital conversion module, described analog-to-digital conversion module is connected to described control module, it is characterized in that:
Described circuit board is parallel to described front, described first front end conditioning module and the described second front end conditioning module are parallel to described bottom surface arranges, and described analog-to-digital conversion module is arranged on the side of described two front end conditioning module near described end face.
2. digital oscilloscope according to claim 1 is characterized in that: described control module is arranged on the side of described analog-to-digital conversion module near described end face.
3. digital oscilloscope according to claim 1 is characterized in that: the length of lead that length and the described second front end conditioning module that the described first front end conditioning module is connected to the lead of described analog-to-digital conversion module is connected to described analog-to-digital conversion module is identical.
4. digital oscilloscope according to claim 1, it is characterized in that: described analog-to-digital conversion module comprises one first analog to digital conversion circuit and one second analog to digital conversion circuit, the described first front end conditioning module is connected to described first analog to digital conversion circuit, the described second front end conditioning module is connected to described second analog to digital conversion circuit, and the length of lead that length and the described second front end conditioning module that the described first front end conditioning module is connected to the lead of described first analog to digital conversion circuit is connected to described second analog to digital conversion circuit is identical.
5. according to any described digital oscilloscope in the claim 1 to 4, it is characterized in that: the described first front end conditioning module has one first input interface, the described second front end conditioning module has one second input interface, and the plug direction of described first interface and described second interface is perpendicular to described circuit board.
6. digital oscilloscope comprises:
One have end face, bottom surface and positive shell and
A circuit board that is arranged in the described shell, has one first front end conditioning module on the described circuit board, one second front end conditioning module, one first analog-to-digital conversion module, one second analog-to-digital conversion module, one first control module, one second control module and a clock module, the described first front end conditioning module, first analog-to-digital conversion module links to each other in regular turn with first control module, the described second front end conditioning module, second analog-to-digital conversion module links to each other in regular turn with second control module, described clock module is connected to described first analog-to-digital conversion module and second analog-to-digital conversion module, it is characterized in that:
Described circuit board is parallel to described front, described first front end conditioning module and the described second front end conditioning module are parallel to described bottom surface and arrange, the described first front end conditioning module, first analog-to-digital conversion module and first control module are in regular turn gradually near described end face setting, and the described second front end conditioning module, second analog-to-digital conversion module and second control module are in regular turn gradually near described end face setting.
7. digital oscilloscope according to claim 6 is characterized in that: the described first front end conditioning module is connected to the length of lead of described first analog-to-digital conversion module and the equal in length that described two front end conditioning module are connected to the lead of described second analog-to-digital conversion module.
8. digital oscilloscope according to claim 6 is characterized in that: described first analog-to-digital conversion module is connected to the length of lead of described first control module and the equal in length that described second analog-to-digital conversion module is connected to the lead of described second control module.
9. digital oscilloscope according to claim 6 is characterized in that: described clock module is connected to the length of lead of described first analog-to-digital conversion module and the equal in length that described clock module is connected to the lead of described second analog-to-digital conversion module.
10. according to any described digital oscilloscope in the claim 6 to 9, it is characterized in that: the described first front end conditioning module has one first input interface, the described second front end conditioning module has one second input interface, and the plug direction of described first interface and described second interface is perpendicular to described circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920145388U CN201392356Y (en) | 2009-03-20 | 2009-03-20 | Digital oscilloscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920145388U CN201392356Y (en) | 2009-03-20 | 2009-03-20 | Digital oscilloscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392356Y true CN201392356Y (en) | 2010-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920145388U Expired - Lifetime CN201392356Y (en) | 2009-03-20 | 2009-03-20 | Digital oscilloscope |
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| Country | Link |
|---|---|
| CN (1) | CN201392356Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384994A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Multi-channel composite trigger digital oscilloscope |
| CN102967738A (en) * | 2012-12-04 | 2013-03-13 | 常州市微朗电子科技有限公司 | Oscilloscope with protection function |
| CN103018511A (en) * | 2012-12-04 | 2013-04-03 | 常州市微朗电子科技有限公司 | Oscilloscope good in radiating performance |
-
2009
- 2009-03-20 CN CN200920145388U patent/CN201392356Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102384994A (en) * | 2010-09-06 | 2012-03-21 | 河南友利华系统工程有限公司 | Multi-channel composite trigger digital oscilloscope |
| CN102967738A (en) * | 2012-12-04 | 2013-03-13 | 常州市微朗电子科技有限公司 | Oscilloscope with protection function |
| CN103018511A (en) * | 2012-12-04 | 2013-04-03 | 常州市微朗电子科技有限公司 | Oscilloscope good in radiating performance |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100127 |
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| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Rigol Technologies, Inc. Document name: Notification of Expiration of Patent Right Duration |
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| DD01 | Delivery of document by public notice |