CN209387717U - A kind of eight channel computer oscilloscopes - Google Patents
A kind of eight channel computer oscilloscopes Download PDFInfo
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- CN209387717U CN209387717U CN201920035410.8U CN201920035410U CN209387717U CN 209387717 U CN209387717 U CN 209387717U CN 201920035410 U CN201920035410 U CN 201920035410U CN 209387717 U CN209387717 U CN 209387717U
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Abstract
The utility model discloses a kind of eight channel computer oscilloscopes comprising portable main machine and eight active probes；The active probe is connect by cable with the portable main machine；Touch screen and the interface for connecting with the cable are provided in the portable main machine；One end of the cable is connect with the active probe, and the other end is connect with the interface；The utility model has the advantages that: active probe is used to signal to be detected being converted to optical signal, and pass through the digital signal after the optical fiber transmitting and converting in cable, it avoids using problem of dtmf distortion DTMF existing for wire transmission high frequency analog signals, allow the signal to be detected after conversion to transmit longer distance, synchronizes detection and comparative analysis convenient for many places signal of the user to large scale equipment.
Description
Technical field
The utility model relates to electronic technology fields, and in particular to a kind of eight channel computer oscilloscopes.
Background technique
In the debugging and maintenance process of electronic equipment, oscillograph is essential tool.Oscillograph is for detecting simultaneously
Show the waveform of the part signal in electronic equipment.In use process, need the electricity of the probe and signal to be detected of oscillograph
Road connection, so that oscillograph samples signal to be detected.
In certain detection process, need to synchronize sampling to many places signal using the oscillograph of multichannel, so as to right
Multiple signals compare and analyze.During being detected to large scale equipment, it usually needs be separately connected multiple probes
At multiple positions of equipment, this is needed using the biggish probe of conductor length.In the case, if signal frequency to be detected compared with
Height, too long conducting wire may lead to the signal to be detected transmitted with analog signal form because of factors such as crosstalk, antenna effects
Serious distortion.
Utility model content
The purpose of this utility model is to provide a kind of eight channel computer oscillographys according to above-mentioned the deficiencies in the prior art place
Device, eight channel computer oscilloscope can transmit signal to be detected by optical signal, avoid high frequency analog signals and be difficult to
The problem of remote transmission.
The utility model aim realization is completed by following technical scheme:
A kind of eight channel computer oscilloscopes comprising portable main machine and eight active probes；The active probe
It is connect by cable with the portable main machine；Touch screen is provided in the portable main machine and for connecting with the cable
The interface connect；Wherein:
The active probe includes active module embedded therein and probe；The active module embedded therein is internally provided with sequentially connected filtering
Device, amplifier, high speed analog-to-digital conversion module, signal processor and transmission optical module；The input terminal of the filter with it is described
Probe connection；Be additionally provided with power module in the active module embedded therein, the power module be used for the filter, amplifier,
High speed analog-to-digital conversion module, signal processor and transmission optical module are powered；
Synchronous signal line, optical fiber and power supply line are provided in the cable；The synchronous signal line, the optical fiber and
The power supply line is respectively used to and signal processor, the transmission optical module and the power module in the active module embedded therein
Connection；
It is provided with central processing module in the portable main machine, receives optical module, synchronous generator, Waveform storage
Device and power supply module；The power supply module is connect with the power supply line in each cable, for supplying to each active probe
Electricity；The quantity for receiving optical module is eight, and each reception optical module is connect with the optical fiber in each cable respectively, each institute
The output end for stating reception optical module is connect with the central processing module；The output end of the synchronous generator with it is each described
Synchronous signal line connection in cable；The wave memorizer and the touch screen are connect with the central processing module.
Further improvement of the utility model is that the wave memorizer is DDR4 memory, number two；It is described
Central processing module includes dual access memory controller, and the central processing module is by dual access memory controller respectively with two
A wave memorizer connection.
Further improvement of the utility model is that the synchronous generator is used to generate differential clock signal；
The sample frequency ratio of the frequency of the differential clock signal and the high speed analog-to-digital conversion module is 0.25 to 0.125；It is described
Synchronous signal line is differential signal line.
Further improvement of the utility model is, the sample frequency of the high speed analog-to-digital conversion module be 100MSPS extremely
1200MSPS；The high speed analog-to-digital conversion module is connect by LVDS interface with the signal processor；The signal processor
For FPGA.
Further improvement of the utility model is that the length of the cable is 2m to 20m.
Further improvement of the utility model is that the inside of the portable main machine is additionally provided with massive store and sets
Standby, Ethernet interface and USB interface；The mass-memory unit, the Ethernet interface and the USB interface with
The central processing module connection.
The utility model has the advantages that: active probe is used to be converted to signal to be detected optical signal, and by cable
Optical fiber transmitting and converting after digital signal, avoid using problem of dtmf distortion DTMF existing for wire transmission high frequency analog signals so that
Signal to be detected after conversion can transmit longer distance, synchronize inspection convenient for many places signal of the user to large scale equipment
Survey and comparative analysis.
Detailed description of the invention
Fig. 1 is the schematic diagram of eight channel computer oscilloscope of the utility model；
Fig. 2 is the schematic diagram of active module embedded therein in the utility model；
Fig. 3 is the schematic diagram for having portable main machine in the utility model.
Specific embodiment
The feature of the utility model and other correlated characteristics are made further specifically by embodiment below in conjunction with attached drawing
It is bright, in order to the understanding of technical staff of the same trade:
As shown in Figures 1 to 3, in figure mark 1-24 be respectively as follows: portable main machine 1, active probe 2, cable 3, touch screen 4,
Interface 5, probe 7, filter 8, amplifier 9, high speed analog-to-digital conversion module 10, signal processor 11, sends light at active module embedded therein 6
Module 12, synchronous signal line 14, optical fiber 15, power supply line 16, central processing module 17, receives optical module 18, is same power module 13
Walk signal generator 19, wave memorizer 20, power supply module 21, too network interface 22, USB interface 23, mass-memory unit 24.
Embodiment: as shown in Figure 1, the present embodiment is specifically related to a kind of eight channel computer oscilloscopes comprising portable
Host 1 and eight active probes 2.Active probe 2 is attached with portable main machine 1 by cable 3.Active probe 2 is used for
Analog-to-digital conversion is carried out to signal to be detected, obtains digital signal, and the digital signal after sample conversion is passed through in cable 3
Optical fiber is transmitted.By the digital signal after optical fiber transmitting and converting, avoids and existed using wire transmission high frequency analog signals
Problem of dtmf distortion DTMF, allow conversion after signal to be detected transmit longer distance, convenient for user to the more of large scale equipment
Place's signal synchronizes detection and comparative analysis.
Touch screen 4 and the interface 5 for connecting with cable 3 are provided in portable main machine 1.The number of interface 5 is eight,
Portable main machine 1 is powered by built-in lithium battery.Touch screen 4 is used to show the waveform of signal to be detected, and for and
User carries out control interaction.
As shown in Figure 1, 2, active probe 2 includes active module embedded therein 6 and probe 7.Active module embedded therein 6, which is internally provided with, successively to be connected
Filter 8, amplifier 9, high speed analog-to-digital conversion module 10, signal processor 11 and the transmission optical module 12 connect.Filter 8
Input terminal is connect with probe 7.Power module 13 is additionally provided in active module embedded therein 6, power module 13 is used for filter 8, amplification
Device 9, high speed analog-to-digital conversion module 10, signal processor 11 and transmission optical module 12 are powered.Probe 7 for and it is to be detected
Circuit connection, to obtain signal to be detected.Filter 8 and amplifier 9 carry out signal to be detected for successively pre-
Processing.High speed analog-to-digital conversion module 10 is high-speed ADC (analog-to-digital converter) chip, and being used for will be to be checked
It surveys signal and carries out sample conversion into digital signal.The sample frequency of high speed analog-to-digital conversion module 10 is 100MSPS (million
Sample per second) to 1200MSPS.High speed analog-to-digital conversion module 10 is connected by LVDS interface and signal processor 11
It connects.Signal processor 11 is FPGA, and the digital signal that signal processor 11 is used to generate high speed analog-to-digital conversion module 10 is sent
To optical module 12 is sent, transmission optical module 12 is SFP optical module, sends optical module 12 and is used to pass through the digital signal after conversion
Optical fiber in cable 3 is transmitted to portable main machine 1.
Synchronous signal line 14, optical fiber 15 and power supply line 16 are provided in cable 3.The transmission of optical fiber 15 and active probe 2
Optical module 12 connects, and transmits the signal to be detected after conversion.Power module 13 in power supply line 16 and active probe 2 connects,
And it powers to it.The length of cable 3 is 2m to 20m, and the optical fiber in cable 3 has good anti-interference ability, and remote biography
Defeated decaying is smaller, can carry out long distance transmission to the signal to be detected after conversion.
Synchronous signal line 14 is connect with the signal processor 11 in active probe 2, and synchronous signal line 14 is used for transmission portable
The differential clock signal that formula host 1 generates, the signal processor 11 under the control of differential clock signal, in each active probe 2
It can run simultaneously, eliminate sampling deviation caused by each 2 asynchronous working of active probe.The frequency of differential clock signal with it is described
The sample frequency ratio of high speed analog-to-digital conversion module 10 is 0.25 to 0.125, this makes the frequency of differential clock signal lower, can
To carry out long distance transmission by cable 3.Synchronous signal line 14 is differential signal line, and synchronization can be enhanced using differential signal line
The anti-interference ability of signal wire 14.
As shown in Figures 1 to 3, it is provided with central processing module 17 in portable main machine 1, receives optical module 18, synchronization signal
Generator 19, wave memorizer 20 and power supply module 21.
Power supply module 21 is connect with the power supply line 16 in each cable 3, and power supply module 21 is used to power to each active probe 2.
The quantity for receiving optical module 18 is eight, and each optical module 18 that receives is connect with the optical fiber 15 in each cable 3 respectively, respectively receives optical module
18 output end is connect with central processing module 17, is received optical module 18 and is used for the received optical signal from cable 3
Digital signal is converted to, the optical signal in cable 3 is the signal to be detected after conversion.Wave memorizer 20 and touch screen 4 with
Central processing module 17 connects.Central processing module 17 is used to receive at the digital signal that the conversion of optical module 18 generates
Reason obtains signal to be detected, and each signal to be detected is shown by touch screen 4, or be stored in wave memorizer 20
In.
Synchronous generator 19 is used to connect with the synchronous signal line 14 in each cable 3.Synchronous generator 19 is used
In generating differential clock signal, worked asynchronously with controlling each active probe 2.Synchronous generator 19 and power supply module 21 are same
It works under the control of central processing module 17 with 17 synchronized links of central processing module.
In the prior art, oscillograph usually pass through SRAM (Static Random-Access Memory) keep in it is to be detected
Signal, SRAM have low latency, high-frequency readwrite performance.But the usual capacity of SRAM is smaller (hundred MB of maximum number), and valence
Lattice are expensive, and which results in the memory depth of oscillograph is excessively shallow, it is difficult to store a large amount of Wave data.
In the present embodiment, wave memorizer 20 is DDR4 memory, number two；Central processing module 17 includes bilateral
Road Memory Controller Hub, central processing module 17 are connect with two wave memorizers 20 respectively by dual access memory controller.This
20 read-write frequency of wave memorizer of embodiment is very high, but postpones larger, and SDRAM is due to framework, need timing into
Row charging refreshes.In the present embodiment, central processing module 17 carries out alternately read-write to two wave memorizers 20, in a waveform
Memory 20 be written when charging refreshes to another wave memorizer 20, and two such wave memorizer 20 alternately fills
Brush is new, solves the problems, such as that wave memorizer 20 is difficult to continue write-in, wave memorizer 20 is continuously deposited for a long time
Store up the waveform of signal to be detected.In the present embodiment, central processing module 17 can be using logical with dual access memory controller
With CPU, the FPGA with multiple Memory Controller Hub can also be used.
The inside of portable main machine 1 is additionally provided with mass-memory unit 24, Ethernet interface 22 and USB interface 23.
Mass-memory unit 24, Ethernet interface 22 and USB interface 23 are connect with central processing module 17.Massive store is set
Standby 24 be hard disk, and mass-memory unit 24 is used for long-term stored waveform data；Ethernet interface 22 and USB interface 23 are used for
Communication connection is carried out with other equipment.
Combine figure embodiment that the utility model is described in detail above, those skilled in the art can root
Many variations example is made to the utility model according to above description.Thus, certain details in embodiment should not constitute practical to this
Novel restriction, the utility model will be using the ranges that the appended claims define as protection scope.
Claims (6)
1. a kind of eight channel computer oscilloscopes, which is characterized in that including portable main machine and eight active probes；It is described to have
Source probe is connect by cable with the portable main machine；Be provided in the portable main machine touch screen and for and it is described
The interface of cable connection；Wherein:
The active probe includes active module embedded therein and probe；The active module embedded therein be internally provided with sequentially connected filter,
Amplifier, high speed analog-to-digital conversion module, signal processor and transmission optical module；The input terminal of the filter and the probe
Connection；Power module is additionally provided in the active module embedded therein, the power module is used for the filter, amplifier, high speed
Analog-to-digital conversion module, signal processor and transmission optical module are powered；
Synchronous signal line, optical fiber and power supply line are provided in the cable；The synchronous signal line, the optical fiber and described
Power supply line is respectively used to and the signal processor, the transmission optical module and the power module in the active module embedded therein
Connection；
Be provided in the portable main machine central processing module, receive optical module, synchronous generator, wave memorizer with
And power supply module；The power supply module is connect with the power supply line in each cable, for powering to each active probe；Institute
Stating and receiving the quantity of optical module is eight, and each reception optical module is connect with the optical fiber in each cable respectively, each institute
The output end for stating reception optical module is connect with the central processing module；The output end of the synchronous generator with it is each described
Synchronous signal line connection in cable；The wave memorizer and the touch screen are connect with the central processing module.
2. eight channel computer oscilloscopes of one kind as described in claim 1, which is characterized in that the wave memorizer is DDR4
Memory, number two；The central processing module includes dual access memory controller, and the central processing module passes through double
Channel Memory Controller Hub is connect with two wave memorizers respectively.
3. eight channel computer oscilloscopes of one kind as described in claim 1, which is characterized in that the synchronous generator
For generating differential clock signal；The sample frequency ratio of the frequency of the differential clock signal and the high speed analog-to-digital conversion module
Value is 0.25 to 0.125；The synchronous signal line is differential signal line.
4. eight channel computer oscilloscopes of one kind as described in claim 1, which is characterized in that the high speed analog-to-digital conversion module
Sample frequency be 100MSPS to 1200MSPS；The high speed analog-to-digital conversion module passes through LVDS interface and the signal processing
Device connection；The signal processor is FPGA.
5. eight channel computer oscilloscopes of one kind as described in claim 1, which is characterized in that the length of the cable be 2m extremely
20m。
6. eight channel computer oscilloscopes of one kind as described in claim 1, which is characterized in that the inside of the portable main machine
It is additionally provided with mass-memory unit, Ethernet interface and USB interface；The mass-memory unit, the Ethernet connect
Mouth and the USB interface are connect with the central processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035410.8U CN209387717U (en) | 2019-01-09 | 2019-01-09 | A kind of eight channel computer oscilloscopes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920035410.8U CN209387717U (en) | 2019-01-09 | 2019-01-09 | A kind of eight channel computer oscilloscopes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209387717U true CN209387717U (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920035410.8U Expired - Fee Related CN209387717U (en) | 2019-01-09 | 2019-01-09 | A kind of eight channel computer oscilloscopes |
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| CN (1) | CN209387717U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684394A (en) * | 2020-12-04 | 2021-04-20 | 威创集团股份有限公司 | Multi-probe time sequence calibration jig and calibration method |
-
2019
- 2019-01-09 CN CN201920035410.8U patent/CN209387717U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684394A (en) * | 2020-12-04 | 2021-04-20 | 威创集团股份有限公司 | Multi-probe time sequence calibration jig and calibration method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190913 Termination date: 20210109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |