CN208076588U - A kind of waveform signal collecting device - Google Patents

Abstract

The utility model is related to a kind of waveform signal collecting devices, including：Connector couples with the connector on tested measurement equipment, the data being used for transmission on tested measurement equipment；AD Acquisition Circuit exports the data conversion that connector exports to processor at digital signal, and by the digital signal；Processor receives and processes digital signal, and signal is exported to display by treated；Display, for real-time display processor treated waveform signal；Power circuit is powered for whole equipment.The utility model can be attached by the cable and being devices under of transferring, avoid traditional Waveshape Collecting System acquired at tested object connector interface using acquisition probe it is inconvenient for operation when signal, the problem of easy maloperation.

Description

A kind of waveform signal collecting device

Technical field

The utility model belongs to waveform signal acquisition field, and in particular to a kind of waveform signal collecting device.

Background technology

Traditional waveform acquisition equipment is usually made of signal conditioning circuit, high-speed AD acquisition circuit, acquisition probe.Tradition Technology have the following disadvantages：

1, the usual shell of large scale electronic equipment is inconvenient to open, and internal structure is complicated, and connector interface stitch is intensive, Traditional waveform collecting device acquisition probe can not directly acquire measured signal external, the in addition acquisition of traditional Waveshape Collecting System Probe is smaller, maloperation is easy when acquiring signal at connector interface, therefore traditional waveform collecting device can not be suitable for spy The problem of when kind device fails, positions；

2, traditional waveform collecting device is only capable of realizing that high-voltage signal is converted into low-voltage signal by signal conditioning circuit, and right Signal carries out shaping, and when measured object internal fault, measured signal is likely to occur the abnormal conditions such as overcurrent, overvoltage, can be to waveform Collecting device internal circuit damages；

3, when measured signal is more, traditional Waveshape Collecting System can only one by one be measured by manually, cumbersome, And when tested object is complicated, manual operation has some potential safety problems.

Invention content

In order to solve the problems, such as that traditional waveform collecting device acquisition probe can not be in external directly acquisition measured signal, this reality A kind of waveform signal collecting device is provided with novel.The technical problems to be solved in the utility model is real by the following technical programs It is existing：

A kind of waveform signal collecting device, including：

Connector couples with the connector on tested measurement equipment, the data being used for transmission on tested measurement equipment；

AD Acquisition Circuit exports the data conversion that connector exports to processing at digital signal, and by the digital signal Device；

Processor receives and processes digital signal, and signal is exported to display by treated；

Display, for real-time display processor treated waveform signal；

Power circuit is powered for whole equipment.

A kind of above-mentioned waveform signal collecting device, isolation circuit is additionally provided between the connector and AD Acquisition Circuit, The isolation circuit is isolated for realizing data/address bus and tested measurement equipment, abnormal to prevent measured signal from occurring, to waveform Signal collecting device damages.

A kind of above-mentioned waveform signal collecting device, the output end of the connector are also connected with the input of serial port control circuit End, the input terminal of the output end connection processing device of serial port control circuit, the serial port control circuit with host computer for being led to News, and receive the control instruction of host computer transmission.

The beneficial effects of the utility model：

The utility model can be attached by cable of transferring with being devices under, and avoiding traditional Waveshape Collecting System makes Inconvenient for operation when signal, the problem of being easy maloperation is acquired at tested object connector interface with acquisition probe.

The utility model is described in further details below with reference to accompanying drawings and embodiments.

Description of the drawings

Fig. 1 is the composition frame chart of universal signal waveform acquisition equipment.

Fig. 2 is the schematic diagram of Inverse problem circuit.

Fig. 3 is the schematic diagram of high-speed AD acquisition circuit.

Fig. 4 is the data processing circuit schematic diagram of microcontroller.

Fig. 5 is the circuit diagram of serial data bus.

Fig. 6 is the composition frame chart of waveform signal collecting device.

Specific implementation mode

Reach the technological means and effect that predetermined purpose is taken for the utility model is expanded on further, below in conjunction with attached drawing And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.

Embodiment 1：

In order to solve the problems, such as that traditional waveform collecting device acquisition probe can not be in external directly acquisition measured signal, reference Fig. 6, present embodiment discloses a kind of waveform signal collecting devices, including：

Connector couples with the connector on tested measurement equipment, the data being used for transmission on tested measurement equipment；

Isolation circuit, it is abnormal to prevent measured signal from occurring for realizing being isolated for data/address bus and tested measurement equipment, it is right Waveform signal collecting device damages；

High-speed a/d Acquisition Circuit carries out waveform acquisition to the data of connector output, forms waveform acquisition signal, and will The waveform acquisition signal is exported to processor；

Processor, dominant frequency reach 1.2GHz, receive and process waveform acquisition signal, and signal is exported to aobvious by treated Show device；

Display, for real-time display processor treated waveform signal；

Power circuit is powered for whole equipment.

In actual use, connector can select the micro- rectangular electric connector of J30J types, the micro- rectangle electrical connection of the J30J types Device can be exchanged with U.S.'s MDM series of products and domestic similar product, and aluminum alloy casing is increased on the basis of J30 series of products It is pressed from both sides with various aluminium alloy tails；Using stranded contact pin（It is commonly called as twist needle）, single contact contact point improves product up to seven Contact reliability；Using 1.27mm grids, contact density is big, small, light-weight；Existing 9,15,21,25,31,37, 51, totally ten kinds of type spectrums are alternative for 66,74,100 cores；It is 0.07~0.15mm2 to be applicable in wire core sectional area, and tail end can root It requires to connect up according to user, the environment temperature of the micro- rectangular electric connector of J30J types：- 55~+125 DEG C, relative humidity：+40℃ Up to 95%, vibration：10~2000Hz, 196m/s2, impact：735m/s2, acceleration：735m/s2, rated current：3A, contact electricity Resistance：≤ 10M Ω, insulation resistance：>=5000M Ω, dielectric withstanding voltage：800V, mechanical life：500 times.

The high-speed a/d Acquisition Circuit of the present embodiment can select AD92XX series of high speed high-precision adc Acquisition Circuits, AD92XX series is 12 Dual-channel digital analog converter chips that ADI companies release, which is powered using 3.3 v, and speed can Select 20MS/s, 40 MS/s and 65 MS/s.It can provide excellent dynamic property same as single channel A/D converter, still Than using 2 single channel A/D converters that there is better cross talk resistance energy.2 ADC channels of AD92XX are in addition to sharing inside Outside voltage reference source VREF, it is other be substantially it is independent.AD92XX uses pipeline work, in each clock signal Rising edge is sampled, and after 7 clock cycle, data occur on the data line.The output data of AD92XX is TTL/ CMOS is compatible with level.

The processor of the present embodiment can select tetra- core ARMA9 processors of IMX6Q, which is The first item risc microcontroller of the low-power consumption cost of Acorn Co., Ltds of Britain design.Full name is Advanced RISC Machine.Arm processor itself is 32 designs, but is also equipped with 16 bit instruction collection, is saved in general than 32 codes of equal value Up to 35%, the institute that can but retain 32 systems is advantageous.

With reference to Fig. 6, the connector of the present embodiment is electrically connected with the connector on tested measurement equipment, and the output end of connector connects Connect the input terminal of isolation circuit, the input terminal of the output end connection AD Acquisition Circuit of isolation circuit, the output end of AD Acquisition Circuit The input terminal of connection processing device, the input terminal of the output end connection display of processor, output end and the AD of power circuit are acquired The power end electrical connection of circuit, processor, display.

As shown in figure 5, the isolation circuit of the present embodiment is made of isolated amplifier and filter circuit, wherein connector Output end and the input terminal of isolated amplifier connect, the input terminal of the output end of isolated amplifier and filter circuit connects, filter The output end of wave circuit and the input terminal of AD Acquisition Circuit connect.

In the present embodiment, there is no direct circuit coupling between the input of isolated amplifier signal, signal output and power circuit It closes, i.e., signal does not have public ground terminal in transmission process, and isolation level is high and leakage current is small, by Devices to test and test Equipment is isolated, and is played an important role to protection test equipment.Filter circuit filtered out the burr that mixes in measured signal and Clutter ensure that the accurate of waveform acquisition result.In addition, isolated amplifier has been internally integrated isolated power supply, eliminate it is external every From power supply, circuit cost is reduced.

The present embodiment can be attached by the cable and being devices under of transferring, and avoid traditional Waveshape Collecting System use Acquisition probe acquired at tested object connector interface it is inconvenient for operation when signal, be easy maloperation the problem of.

Embodiment 2：

In order to solve when measured signal is more, traditional Waveshape Collecting System can only one by one be measured by manually, behaviour Make cumbersome problem as shown in Figure 1, present embodiment discloses a kind of universal signal waveform acquisition equipment, which adopts Collect equipment by serial port control circuit, embeded processor circuit, Inverse problem circuit, isolation circuit, high-speed AD acquisition circuit, company Connect device, power circuit, display composition；

Wherein：

Serial port control circuit：It is communicated with host computer, receives the control instruction from host computer, can receive host computer Control instruction completes the function that multichannel automatically switches acquisition；

Inverse problem circuit：By receiving the control signal sent from embeded processor, realize that each channel data is total The gating of line and switching；

Isolation circuit：It realizes that data/address bus is isolated with measured object, prevents measured object bus from breaking down, to general letter Number waveform acquisition equipment damages；

High-speed AD acquisition circuit：It realizes that data/address bus waveform acquires in real time, supports a variety of sample modes, maximum sampling rate For 60MSPS；

Connector：It is attached for the connector with measured object；

Power circuit：For system power supply；

Display：For bus waveform real-time display.

As shown in Figure 2 and Figure 3, Inverse problem circuit is made of multiple relays, relay select single-pole double throw c-type after Electric appliance, between relay independently of each other, the control terminal of relay connect with embeded processor, and common end and high-speed AD acquisition are electric Road connects, and normally open end is connected with each measured signal pin of connector, and relay normal-closed end is hanging.Embeded processor passes through control The turn-on and turn-off of c-type relay realize gating and the switching of signal, after embeded processor sends out instruction, corresponding relay Common end be connected with normally open end, the same time only there are one relay be connected.

As shown in figure 4, serial port control circuit and sends an instruction to insertion by receiving the control instruction from host computer Formula processor；Processor parses instruction, sends switching command to Inverse problem circuit；Inverse problem circuit is according to switching Instruction, by specified signal gating, is sent to high-speed AD acquisition circuit；High-speed AD acquisition circuit carries out waveform acquisition to signal, Collection result is sent to embeded processor；Embeded processor is handled and is analyzed to waveform acquisition result, and by wave Shape is shown in display.

As shown in figure 5, isolation circuit is made of isolated amplifier and filter circuit, isolated amplifier signal inputs, is defeated Go out not having between power circuit direct circuit coupling, i.e. signal there is no public ground terminal, isolation level in transmission process High and leakage current is small, and Devices to test is isolated with test equipment, plays an important role to protection test equipment.Filtered electrical Road has filtered out the burr and clutter mixed in measured signal, ensure that the accurate of waveform acquisition result.In addition, in isolated amplifier Portion is integrated with isolated power supply, eliminates external isolated power supply, reduces circuit cost.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard To belong to the scope of protection of the utility model.

Claims (3)

1. a kind of waveform signal collecting device, which is characterized in that including：

Connector couples with the connector on tested measurement equipment, the data being used for transmission on tested measurement equipment；

AD Acquisition Circuit carries out waveform acquisition to the data of connector output, forms waveform acquisition signal, and by the waveform acquisition Signal is exported to processor；

Processor receives and processes waveform acquisition signal, and signal is exported to display by treated；

Display, for real-time display processor treated waveform signal；

Power circuit is powered for whole equipment.

2. waveform signal collecting device as described in claim 1, which is characterized in that between the connector and AD Acquisition Circuit It is additionally provided with isolation circuit, the isolation circuit is isolated for realizing data/address bus and tested measurement equipment, to prevent measured signal There is exception, waveform signal collecting device is damaged.

3. waveform signal collecting device as claimed in claim 1 or 2, which is characterized in that the output end of the connector also connects Connect the input terminal of serial port control circuit, the input terminal of the output end connection processing device of serial port control circuit, the serial ports control electricity Road receives the control instruction of host computer transmission for being communicated with host computer.