CN105553289B - Test system and its signal isolation equipment - Google Patents
Test system and its signal isolation equipment Download PDFInfo
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- CN105553289B CN105553289B CN201610066647.3A CN201610066647A CN105553289B CN 105553289 B CN105553289 B CN 105553289B CN 201610066647 A CN201610066647 A CN 201610066647A CN 105553289 B CN105553289 B CN 105553289B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The invention belongs to signal processing technology field, a kind of test system and its signal isolation equipment are disclosed.In the present invention, by using the signal isolation equipment including rectification circuit Yu square wave inverter circuit, make each rectification branch by AC rectification at direct current, and clutter phase delay processing is carried out by filter unit, and each rectification branch will treated exports the first direct current after direct current carries out voltage conversion by clutter phase delay；The first direct current that multiple rectification branches are exported exports the second direct current to square wave inverter circuit after carrying out voltage superposition and clutter counteracting processing, the second direct current of square wave inverter circuit pair exported after boosting is handled with rectification, realize filtering out for noise signal, ensure correctness of the signal in transmission process, and signal isolation equipment is realized using rectification circuit simple in structure, so that the structure of signal isolation equipment is simple, small, it is big, of high cost that there are volumes to solving the problems, such as existing signal isolator.
Description
Technical field
The invention belongs to signal processing technology field more particularly to a kind of test systems and its signal isolation equipment.
Background technology
With the upgrading of manufacturing, production line automation is tested degree and is continuously improved, so that a test
Host can detect more measurement equipments to be checked simultaneously.When test main frame, which treats detection device, to be detected, it is necessary to pass through modulation
Demodulated equipment is transmitted to measurement equipment to be checked after detecting signal processing, and passes through between modulation /demodulation equipment and measurement equipment to be checked
Power line transmission signals, and when signal transmits in power line easy to produce interference signal, which will influence signal
Transmission, and then lead to test crash.
Currently, in order to eliminate the signal interference on power line, the prior art is using six grades of isolators of import to power line
On signal interference be isolated, however the volume of the signal isolator is larger, expensive, improves product test cost.
In conclusion existing signal isolator has that volume is big, of high cost.
Invention content
The purpose of the present invention is to provide a kind of signal isolation equipment, it is intended to which solving existing signal isolator, there are volumes
Greatly, problem of high cost.
The invention is realized in this way a kind of signal isolation equipment comprising square wave inverter circuit and rectification circuit, it is described
Rectification circuit is connect with the square wave inverter circuit；
The rectification circuit includes multiple rectification branches, and the multiple rectification branch receives external ac power source output
Alternating current, the output end series connection of the multiple rectification branch, each rectification branch includes filter unit；
The AC rectification is carried out clutter phase by each rectification branch at direct current, and by the filter unit
Position delay disposal, and each rectification branch will that treated be defeated after direct current carries out voltage conversion by clutter phase delay
Go out the first direct current；The the first direct current progress voltage superposition and clutter counteracting that the multiple rectification branch is exported are defeated after handling
Go out the second direct current to the square wave inverter circuit, the square wave inverter circuit carries out boosting and rectification to second direct current
It is exported after processing；
Wherein, the filter unit of the multiple rectification branch carries out when clutter phase delay is handled according to not exactly the same
Phase difference carries out, and treated that direct current includes that identical clutter prolongs for first direct current and the progress clutter phase delay
Slow signal, the sum of the voltage swing of second direct current and the voltage of first direct current of the multiple rectification branch phase
Deng.
Another object of the present invention also resides in a kind of test system of providing, and residing test system includes host, interchanger, more
A detection group and multiple above-mentioned signal isolation equipment, each detection group are connect by power line with the host, described every
A detection group includes aided-detection device and measurement equipment to be checked, and the aided-detection device to be detected is set by power line with described
Standby connection, the first signal isolation equipment are connected to the aided-detection device in the host and first detection group
Between, other signal isolation equipment point in the multiple signal isolation equipment in addition to crossing the first signal isolation equipment
It is not arranged between two adjacent detection groups, the host is sent to each inspection by the interchanger by signal is detected
Aided-detection device in survey group, the aided-detection device in each detection group are modulated demodulation to the detection signal
The measurement equipment to be checked in each detection group is sent to by power line after processing, the measurement equipment to be checked is according to modulation /demodulation
Treated, and detection signal passes through the power line feedback response signal to the aided-detection device, the aided-detection device
The response signal is sent to the host, the host examines the measurement equipment to be checked according to the response signal
It surveys, the signal isolation equipment is used to filter out the interference signal on the power line.
In the present invention, by using the signal isolation equipment including rectification circuit Yu square wave inverter circuit so that each
AC rectification is carried out clutter phase delay processing, and each rectification branch by rectification branch at direct current, and by filter unit
Road will export the first direct current after clutter phase delay treated direct current carries out voltage conversion；Multiple rectification branch institutes
First direct current of output exports the second direct current to square wave inverter circuit, square wave after carrying out voltage superposition and clutter counteracting processing
The second direct current of inverter circuit pair exported after boosting is handled with rectification, realizes filtering out for noise signal, ensures that signal exists
Correctness in transmission process, and signal isolation equipment is realized using rectification circuit simple in structure, and in its rectification branch
Component it is at low cost, small it is existing to solve so that the structure of signal isolation equipment is simple, small
Signal isolator has that volume is big, of high cost.
Description of the drawings
Fig. 1 is the modular structure schematic diagram for the signal isolation equipment that one embodiment of the invention is provided；
Fig. 2 is another modular structure schematic diagram for the signal isolation equipment that one embodiment of the invention is provided；
Fig. 3 is the electrical block diagram of the rectification branch of signal isolation equipment shown in Fig. 2；
Fig. 4 is the modular structure signal of the square wave inverter circuit in the signal isolation equipment that one embodiment of the invention is provided
Figure；
Fig. 5 is the waveform diagram of square wave inverter circuit output voltage shown in Fig. 4；
Fig. 6 is the waveform diagram of voltage on existing power line；
Fig. 7 is the modular structure schematic diagram for the test system that one embodiment of the invention is provided.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The realization of the present invention is described in detail below in conjunction with specific attached drawing：
Fig. 1 shows the modular structure for the signal isolation equipment that one embodiment of the invention is provided, for convenience of description, only
Part related to the present embodiment is shown, details are as follows：
Signal isolation equipment shown in the present embodiment includes square wave inverter circuit 10 and rectification circuit 20, rectification circuit 20 with
Square wave inverter circuit 10 connects, and rectification circuit 20 includes multiple rectification branches 200, and multiple rectification branches 200 receive outer
The alternating current of portion's AC power output, the output end series connection of multiple rectification branches 200, each rectification branch 200 include that filtering is single
First 200a.
Where it is assumed that the number of multiple rectification branches 200 is N, N is the positive integer more than 1, then multiple rectification branches 200
Output end series connection refer to the negative output terminal of first rectification branch 200 and the positive output end company of second rectification branch 200
It connecing, the negative output terminal of second rectification branch 200 is connect with the positive output end of third rectification branch 200, and so on, N-
The negative output terminal of 1 rectification branch 200 is connect with the positive output end of n-th rectification branch 200；And rectification circuit 20 and square wave are inverse
Become circuit 10 and connects the positive output end and n-th rectification branch 200 for referring to first rectification branch 200 in rectification circuit 20
Negative output terminal connect with square wave inverter circuit 10.
Specifically, AC rectification is carried out clutter by each rectification branch 200 at direct current, and by filter unit 200a
Phase delay processing, each rectification branch 200 will export first after the direct current that clutter phase delay is handled is converted
Direct current；The first direct current that multiple rectification branches 200 are exported is overlapped exports the second direct current with after clutter counteracting processing
To square wave inverter circuit 10, the second direct current of square wave inverter circuit pair exported after boosting is handled with rectification electricity；Wherein, multiple
The filter unit 200a of rectification branch 200 carried out according to not exactly the same phase difference when the processing of clutter phase delay, the
One direct current and the direct current for carrying out clutter phase delay processing include identical clutter postpones signal, the voltage of the second direct current
Size is equal with the sum of the voltage of the first direct current of multiple rectification branches 200.
It should be noted that in the present embodiment, external ac power source is alternating current；Preferably, the voltage of the first direct current
Size is 12V, and the voltage of the second direct current is added gained by multiple 12V.
Further, as shown in Fig. 2, each rectification branch 200 further includes rectification unit 200b and voltage conversion unit
200c.Wherein, rectification unit 200b is connect by filter unit 200a with voltage conversion unit 200c, voltage conversion unit 200c
Output end be each rectification branch 200 output end.
Specifically, rectification unit 200b by AC rectification at direct current, filter unit 200a carries out clutter to direct current
It is exported after phase delay processing to voltage conversion unit 200c, voltage conversion unit 200c will be after the processing of clutter phase delay
Direct current be converted to the first direct current.
Further, as shown in figure 3, as a preferred embodiment of the present invention, rectification unit in each rectification branch 200
200b is that rectifier diode D1 is constituted, and the filter unit 200a in each rectification branch 200 is filter capacitor C1；When alternating current is carried
When the 220V alternating currents of confession are input to each rectification branch 200, each rectification branch 200 is by rectifier diode D1 by the 220V
AC rectification is at the semifocal chord wave direct current of 220V, the filtered capacitance C1 progress clutter phase of semifocal chord wave direct current of the 220V
Delay disposal so that the phase of the noise signal in the semifocal chord wave direct current of the 220V generates delay；In the present embodiment, multiple
The capacitance size of filter capacitor C1 in rectification branch 200 is not exactly the same, and with the increase of filter capacitor C1 capacitances, miscellaneous
The phase delay of wave signal is smaller.
Further, as shown in figure 3, as a preferred embodiment of the present invention, the voltage in each rectification branch 200 is converted
Unit 200c further includes driving subelement, flyback subelement and filtering subunit.Wherein, driving subelement and flyback subelement
Connection, flyback subelement are connect with filtering subunit, and the output end of filtering subunit is the output end of voltage conversion unit.
Specifically, driving subelement is according to by clutter phase delay treated DC powered flyback subelement, instead
Exciton unit will pass through clutter phase delay, and treated that direct current is converted to the first direct current, the first direct current of filtering subunit pair
Electricity is filtered.
Further, as shown in figure 3, as a preferred embodiment of the present invention, flyback subelement includes first switching element
Q1, first resistor R1, second resistance R2, the first capacitance C2, the first diode D2 and transformer T, the first of first resistor R1
The connection of first end 1 at end, the first end of second resistance R2, the first end of the first capacitance C2 and transformer T, the first capacitance C2's
Second end, the second end of first resistor R1 are connect with the cathode of the first diode D2, the anode and first of the first diode D2
The input terminal of switch element Q1 and the second end 2 of transformer T connect, second end and the first switching element Q1 of second resistance R2
Control terminal connection.
Further, as shown in figure 3, as a preferred embodiment of the present invention, driving subelement includes second switch element
Q2, the second diode D3, third diode D4, voltage-stabiliser tube D5,3rd resistor R3, the 4th resistance R4, the second capacitance C3 and
Three capacitance C4, the cathode of the input terminal of second switch element Q2, the first end of 3rd resistor R3 and voltage-stabiliser tube D5 is with first
The control terminal of switch element Q1 connects, and the control terminal of second switch element Q2 is connect with the cathode of the second diode D3, and the two or two
The anode of pole pipe D3 is connect with the output end of the first end of the 4th resistance R4 and first switching element Q1, and the of the 4th resistance R4
Two ends, the output end of second switch element Q2, the second end of third capacitance C4 and transformer T the 4th end 4 be grounded, third
The second end of resistance R3 is connect with the first end of the second capacitance C3, the second end of the second capacitance C3, the cathode of third diode D4
It is connect with the third end 3 of transformer T, the first end of the anode D4 and third capacitance C4 of third diode and voltage-stabiliser tube D5's
Anode connects.
Further, as shown in figure 3, as an embodiment of the present invention, filtering subunit includes the 4th diode D6, the 4th
Capacitance C5, the 5th diode D7 and the 5th resistance R5, the anode of the 4th diode D6 are connect with the 6th end 6 of transformer T, the
The cathode of four diode D6 is connect with the first end of the first end of the 4th capacitance C5 and the 5th resistance R5, and the of the 5th resistance R5
Two ends are connect with the anode of the 5th diode D7, the cathode of the 5th diode D7 and the 5th end 5 of transformer T and the 4th capacitance
The second end of C5 connects.
Each rectification branch in the signal isolation equipment that the present invention will be described in detail by taking circuit shown in Fig. 3 as an example below
200 specific work process：
When each rectification branch 200 receives the 220V alternating currents of alternating current, rectifier diode D1 is by the 220V alternating currents
Be rectified into 220V semifocal chord wave direct currents, the 220V semifocal chord wave direct currents in filtered capacitance C1, filter capacitor C1 to its into
Row clutter phase delay processing, by the phase delay of the noise signal in the 220V semifocal chord wave direct currents；When the 220V semifocal chord waves
Direct current controls first switching element Q1 conductings after the processing of clutter phase delay, by second resistance R2, although first
When switch element Q1 conducting, second switch element Q2 can will control the control terminal voltage pull-down of first switching element Q1, but by
It charges to third capacitance C3 when second resistance R2 and 3rd resistor R3 are in the high level of the 220V semifocal chord wave direct currents, therefore the
It is stored with a certain amount of electric energy in three capacitance C3, third capacitance C3 is equivalent to bootstrap capacitor at this time, can be by first switching element Q1
Control terminal voltage high, first switching element Q1 is still in conducting state, therefore, transformer T and first switching element Q1 shapes
At access, at this point, the first end 1 of transformer T, third end 3 and the 6th end 6 are anode, therefore, transformer T is to the 220V
Semifocal chord wave direct current carries out voltage transformation, which is converted to the second direct current, second direct current
It is exported after the 4th diode D6 flows through the 5th capacitance C5 and the 5th diode D7 filtering；When the 220V semifocal chord wave direct currents
Low level is come temporarily, and first switching element Q1 is closed, and no current flows through between transformer T and first switching element Q1, therefore, this
When, first end 1, third end 3 and the 6th end 6 of transformer T are cathode, so that the 4th diode D6 no current streams
It crosses, so that the 5th capacitance C5 and the 5th diode D7 Non voltage outputs.
After the 220V alternating currents that alternating current provides are through multiple rectification branches 200 as shown in Figure 3, rectification circuit 200
Multiple rectification branches 200 the 220V alternating currents are converted into multiple first direct currents, such as multiple 12V DCs electricity, and this is more
Separately include multiple by clutter phase delays treated noise signal in a 12V DC electricity, 200 institute of multiple rectification branches is defeated
The voltage gone out exports the second direct current after being overlapped, equally include multiple by clutter phase delay in second direct current
Noise signal after reason, when multiple rectification branches 200 are overlapped, multiple noise signal is cancelled out each other in same time point,
And then eliminate the interference of noise signal；It should be noted that in the present embodiment, it is multiple after the processing of clutter phase delay
Noise signal there is not exactly the same phase delay, i.e., the phase delay phase of part noise signal in multiple noise signals
Together.
Further, as shown in figure 4, the square wave inverter circuit 10 in signal isolation equipment provided in an embodiment of the present invention wraps
Include control unit 100, boosting unit 101 and rectification filtering unit 102；Control unit 100 is connect with boosting unit 101, control
Unit 100 processed receives control signal, and boosting unit 101 is connect with rectification filtering unit 102；Control unit 100 is believed according to control
Number driving boosting unit 101 carries out boosting processing to third direct current, and rectification filtering unit 102 carries out rectification to third direct current
It is filtered.
Specifically, control unit 100 receives externally input control signal, and boosting unit is controlled according to control signal
101 work, the second direct current that rectification circuit 200 exports first is converted to the alternating current of high frequency by boosting unit 101, and then is being passed through
Crossing output after high frequency transformer is boosted, to rectifying and wave-filtering electricity member 102, rectification filtering unit 102 is sharp by the voltage after boosting
With rectifies at direct current, waveform is as shown in figure 5, due to the output of rectification circuit 20 to square wave inverter circuit 10
Noise signal in second DC voltage has been cancelled out each other, therefore the second direct current that square wave inverter circuit 10 receives is without dry
The pure direct current of signal is disturbed, which is being converted into multiple direct currents shown in fig. 5 after the processing of square wave inverter circuit 10
Electricity, multiple DC voltage is different, and resultant effect is equal to the 220V alternating currents of alternating current offer, and the alternating current compares
State no interference signal for voltage waveform view on existing power line shown in fig. 6.It should be noted that in the present embodiment,
Existing 1500W square-wave inverters can be used in square wave inverter circuit 10.
In the present embodiment, by using the signal isolation equipment including rectification circuit 20 Yu square wave inverter circuit 10, make
Each rectification branch 200 is obtained by AC rectification into direct current, and clutter phase delay processing is carried out by filter unit 200a,
And each rectification branch 200 will treated exports the first direct current after direct current carries out voltage conversion by clutter phase delay
Electricity；The first direct current that multiple rectification branches 200 are exported exports the second direct current after carrying out voltage superposition and clutter counteracting processing
Electricity to square wave inverter circuit 10, square wave inverter circuit 10 to the second direct current export after boosting is handled with rectification, be realized
Noise signal filters out, and ensures correctness of the signal in transmission process, and interference signal will not be via circuit to external radiation shape
At secondary interference；In addition, signal isolation equipment is realized using rectification circuit 20 simple in structure, and in its rectification branch 200
Component is at low cost, small, so that the structure of signal isolation equipment is simple, small, to solve existing letter
Number isolator has that volume is big, of high cost.
Fig. 7 shows that the modular structure for the test system that one embodiment of the invention is provided only is shown for convenience of description
Part related to the present embodiment, details are as follows：
Test system provided in this embodiment includes host 30, interchanger 40, multiple detection groups 50 and multiple Fig. 1 or figure
Signal isolation equipment 60 shown in 2, each detection group 50 include aided-detection device 50a and measurement equipment 50b to be checked；It needs to illustrate
, in the present embodiment, multiple detection groups 50 only show that two groups are used as exemplary illustration, multiple signal isolation equipment 60 same
Only show that two groups are used as exemplary illustration.
Wherein, multiple detection groups 50 are connect by power line with host 30, the aided-detection device in each detection group 50
50a is connect by power line with the measurement equipment 50b to be checked in each detection group 50, and first signal isolation equipment 60 is connected to master
Between aided-detection device 50a in machine 30 and first detection group 50, first signal is removed in multiple signal isolation equipment 60
Other signal isolation equipment except xegregating unit 60 are separately positioned between two adjacent detection groups 50, such as the present embodiment
In second signal isolation equipment 60 be arranged between first detection group 50 and second detection group 50.It needs to illustrate
Be, in the present embodiment, aided-detection device 50a be can the multimedia service signals such as transmission data, voice, image power line
Equipment, such as modem.
Specifically, host 30 is sent to the aided-detection device in each detection group 50 by interchanger 40 by signal is detected
50a, the aided-detection device 50a in each detection group 50 is modulated after demodulation process detection signal to be sent by power line
To the measurement equipment 50b to be checked in each detection group 50, measurement equipment 50b to be checked according to modulation /demodulation treated detection signal pass through
Response signal is sent to host 30 by power line feedback response signal to aided-detection device 50a, aided-detection device 50a, is led
Machine 30 according to response treat detection device 50b and be detected by signal, and signal isolation equipment 60 is used to filter out the interference on power line
Signal；Wherein, host 30 according to response signal treat detection device 50b be detected refer to positioning write the operations such as value；In addition,
When the detection signal that the aided-detection device 50a None- identifieds host 30 in any detection group 50 is sent, can not know except this is crossed
Any aided-detection device 50a in aided-detection device 50a that Jian Ce be outside the aided-detection device 50a of signal can be to detection
Signal is identified, and recognition result is sent to the aided-detection device 50a that the None- identified detects signal, the None- identified
The aided-detection device 50a for detecting signal carries out feeding back corresponding information according to recognition result, and by the information by being sent out to it
The aided-detection device 50a of recognition result is sent to be sent to host 30, to complete to test.
It should be noted that the signal wave frequency band due to aided-detection device 50a is extended by traditional 1.6MHz to 30MHz
To current 3MHz to 87MHz, and its signal frequency range expands to 196 current tunnel frequency ranges by earliest single-channel communication and concurrently leads to
Letter, therefore, as progress signal transmission between multiple aided-detection device 50a or aided-detection device 50a and measurement equipment to be checked
When carrying out signal transmission between 50b, signal will will produce interference signal on power line, and power line is in the mistake of transmission signal
Itself equally will produce interference signal in journey, so that power line environment is severe, severe patient will cause test to re-start；And
Signal isolation equipment 60 in the test system of the present invention can be by signal transmission be carried out between multiple aided-detection device 50a when
Generated interference letter when signal transmission is carried out between the interference signal of generation, aided-detection device 50a and measurement equipment 50b to be checked
Number and the interference signal of power line itself offset, filtered out, ensure that the signal transmission environment of power line, interference avoided to believe
Number influence test system, reduction resurvey rate, improve testing efficiency.
In the present embodiment, by using the test system including signal isolation equipment 60 so that host 30 is to each
When measurement equipment 50b to be checked in detection group 50 is detected, the aided-detection device 50a in multiple detection groups 50 can be effectively filtered out
Between aided-detection device 50a when communicating in generated interference signal, each detection group 50 and each detection group 50 wait for
Generated interference signal when being communicated between detection device 50b avoids interference signal from influencing test system, and rate is resurveyed in reduction, is contracted
The short testing time improves testing efficiency；In addition, testing system shown in the present embodiment uses parallel communications, that is, use one
Host 30 detects multiple measurement equipment 50b to be checked simultaneously, tests a measurement equipment 50b to be checked without a host 30, and then reduce
Production cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (8)
1. a kind of signal isolation equipment comprising square wave inverter circuit, which is characterized in that the signal isolation equipment further includes whole
Current circuit, the rectification circuit are connect with the square wave inverter circuit；
The rectification circuit includes multiple rectification branches, and the multiple rectification branch receives the exchange of external ac power source output
Electricity, the multiple rectification branch connect the positive output end of the latter rectification branch according to the negative output terminal of previous rectification branch
Mode connects, and the positive output end of first rectification branch in the multiple rectification branch and bearing for the last one rectification branch are defeated
Outlet is connect with square wave inverter circuit, and each rectification branch includes filter unit；
Each rectification branch prolongs the AC rectification at direct current, and by filter unit progress clutter phase
Processing late, and each rectification branch will treated that the is exported after direct current carries out voltage conversion by clutter phase delay
One direct current；The first direct current that the multiple rectification branch is exported export after voltage superposition and clutter counteracting processing the
To the square wave inverter circuit, the square wave inverter circuit carries out boosting to second direct current and is handled with rectification two direct currents
After export；
Each rectification branch further includes rectification unit and voltage conversion unit, and the rectification unit passes through the filter unit
It is connect with the voltage conversion unit, the output end of the voltage conversion unit is the output end of each rectification branch；Institute
Rectification unit is stated by the AC rectification into direct current, the filter unit carries out at clutter phase delay the direct current
Output is to the voltage conversion unit after reason, and the voltage conversion unit is by described by clutter phase delay treated direct current
Electricity is converted to first direct current；
Voltage conversion unit in each rectification branch includes driving subelement, flyback subelement and filtering subunit；
The driving subelement is connect with the flyback subelement, and the flyback subelement is connect with the filtering subunit, the filter
The output end of marble unit is the output end of the voltage conversion unit；The driving subelement passes through clutter phase according to described
Flyback subelement described in DC powered after delay disposal, the flyback subelement are handled described by clutter phase delay
Direct current afterwards is converted to first direct current, and the filtering subunit is filtered first direct current；
Wherein, the filter unit of the multiple rectification branch carries out when clutter phase delay is handled according to not exactly the same phase
Difference carries out, and treated that direct current includes identical clutter delay letter for first direct current and the progresss clutter phase delay
Number, the voltage swing of second direct current is equal with the sum of the voltage of first direct current of the multiple rectification branch.
2. signal isolation equipment according to claim 1, which is characterized in that flyback subelement include first switching element,
First resistor, second resistance, the first capacitance, the first diode and transformer, the first end of the first resistor, described second
The first end of the first end of resistance, the first end of first capacitance and the transformer connects, and the of first capacitance
Two ends, the first resistor second end connect with the cathode of first diode, the anode of first diode with
The second end of the input terminal of the first switching element and the transformer connect, the second end of the second resistance with it is described
The control terminal of first switching element connects.
3. signal isolation equipment according to claim 2, which is characterized in that the driving subelement includes second switch member
Part, the second diode, third diode, voltage-stabiliser tube, 3rd resistor, the 4th resistance, the second capacitance and third capacitance, described
The cathode of the input terminal of two switch elements, the first end of the 3rd resistor and the voltage-stabiliser tube is first with the first switch
The control terminal of part connects, and the control terminal of the second switch element is connect with the cathode of second diode, and the described 2nd 2
The anode of pole pipe is connect with the output end of the first end of the 4th resistance and the first switching element, the 4th resistance
Second end, the second switch element output end, the second end of the third capacitance and the 4th end of the transformer
It is grounded, the second end of the 3rd resistor is connect with the first end of second capacitance, the second end of second capacitance, institute
The cathode for stating third diode is connect with the third end of the transformer, anode and the third electricity of the third diode
The anode of the first end of appearance and the voltage-stabiliser tube connects.
4. signal isolation equipment according to claim 3, which is characterized in that the filtering subunit includes the four or two pole
Pipe, the 4th capacitance, the 5th diode and the 5th resistance, the anode of the 4th diode connect with the 6th end of the transformer
It connects, the cathode of the 4th diode is connect with the first end of the first end of the 4th capacitance and the 5th resistance, institute
The second end for stating the 5th resistance is connect with the anode of the 5th diode, cathode and the transformer of the 5th diode
The 5th end and the 4th capacitance second end connection.
5. signal isolation equipment according to claim 4, which is characterized in that the rectification unit in each rectification branch
For rectifier diode.
6. signal isolation equipment according to claim 1, which is characterized in that the filter unit in the multiple rectification branch
For filter capacitor.
7. signal isolation equipment according to claim 1, which is characterized in that the square wave inverter circuit includes that control is single
Member, boosting unit and rectification filtering unit；
Described control unit is connect with the boosting unit, and described control unit receives control signal, the boosting unit and institute
State rectification filtering unit connection；
Described control unit drives the boosting unit to carry out boosting processing to third direct current according to the control signal, described
Rectification filtering unit carries out rectifying and wave-filtering processing to the third direct current.
8. a kind of test system, including host, interchanger and multiple detection groups, the multiple detection group pass through power line and institute
Host connection is stated, each detection group includes aided-detection device and measurement equipment to be checked, and the aided-detection device passes through electricity
The line of force is connect with the measurement equipment to be checked, which is characterized in that the test system further includes multiple such as any one of claim 1-7
The signal isolation equipment, the first signal isolation equipment are connected in the host and first detection group
Between aided-detection device, other signals in the multiple signal isolation equipment in addition to the first signal isolation equipment
Xegregating unit is separately positioned between two adjacent detection groups, and the host is sent to by the interchanger by signal is detected
Aided-detection device in each detection group, aided-detection device in each detection group to the detection signal into
The measurement equipment to be checked in each detection group, the measurement equipment root to be checked are sent to by power line after row modulation /demodulation processing
According to modulation /demodulation treated detection signal by the power line feedback response signal to the aided-detection device, it is described auxiliary
Help detection device that the response signal is sent to the host, the host to be detected is set according to the response signal to described
Standby to be detected, the signal isolation equipment is used to filter out the interference signal on the power line.
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| CN103997230A (en) * | 2014-05-13 | 2014-08-20 | 郭高朋 | Intermediate frequency furnace based on full-wave chopped mode rectifying circuits |
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| CN201392375Y (en) * | 2009-03-24 | 2010-01-27 | 深圳市同朗科技有限公司 | Aging test device |
| CN204269772U (en) * | 2014-11-12 | 2015-04-15 | 中国人民解放军第五三一一工厂 | A kind of circuit module measures adapting system |
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| CN103997230A (en) * | 2014-05-13 | 2014-08-20 | 郭高朋 | Intermediate frequency furnace based on full-wave chopped mode rectifying circuits |
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