CN104391205A - Voltage fault injector with variable gain - Google Patents
Voltage fault injector with variable gain Download PDFInfo
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- CN104391205A CN104391205A CN201410728003.7A CN201410728003A CN104391205A CN 104391205 A CN104391205 A CN 104391205A CN 201410728003 A CN201410728003 A CN 201410728003A CN 104391205 A CN104391205 A CN 104391205A
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Abstract
The invention belongs to the field of test technologies, and relates to a voltage fault injector with variable gain. The device is composed of an injector and an upper computer; when in actual work, the device needs to be connected to a sample to be tested to achieve fault injection into the sample to be tested. The upper computer sends a control command to the injector, the injector based on a gain control loop executes the control command, performs gain adjustment on the original signal amplitude in the sample to be tested, and uses the signal output after adjustment as the fault signal, and therefore the fault injection is achieved. The device can perform gain adjustment on amplitudes of intermediate-frequency and low-frequency analog and digital signals, under the premise of not changing the original phases and frequencies, so that the fault injection precision and range of the related fault modes of the intermediate-frequency and low-frequency analog and digital signals can be greatly extended. Meanwhile, the device can achieve a continuous, spaced and stepping fault injection mode, increases controllability of the fault injection mode, and is convenient to operate and high in efficiency.
Description
Technical field
The invention belongs to testability technical field, relate to a kind of voltage failure injector of adjustable gain.
Background technology
Testability is that equipment is convenient to test and the significant design characteristic of diagnosis, and it has become the independent educational project of equal importance with reliability, maintainability, carries out the research of testability designing technique and has important learning value and Engineering Guidance meaning.In order to weigh, evaluating the testability design level of equipment under the prerequisite not damaging equipment more exactly, phase early 1970s, Failure Injection Technique is arisen at the historic moment, and develops rapidly in many decades, has become a kind of important technical of carrying out product test and system verification.Failure Injection Technique, by injecting fault to tested exemplar artificially, realizes the fault simulation to tested exemplar, thus obtains abundant fault data at short notice, accelerated test process.At present, Failure Injection Technique is mainly to the future development of precision and robotization.And for the direct fault location of voltage signal, still there is following technical limitation: one, in, low frequency simulation is lower with the direct fault location precision of digital voltage signal, is difficult to the actual demand meeting equipment Test and system verification; Its two, the voltage signal fault kind that can simulate covers complete, lacks the technical method that the fault that changes class to voltage signal gain is simulated.
Summary of the invention
Object of the present invention designs for above-mentioned prior art situation the voltage failure injector providing a kind of adjustable gain just, its objective is solve at present, the direct fault location precision of low frequency analog and digital signal is low, fault mode covers comprehensively, the problem of direct fault location poor controllability.
Technical solution of the present invention is,
The voltage failure injector of a kind of adjustable gain of the present invention comprises: host computer, injector, it is characterized in that: injector comprises function motherboard and function daughter board, function motherboard receives the raw voltage signals of tested exemplar input, and by this Signal transmissions to function daughter board; Function motherboard and host computer, by RS232 bus communication, receive the direct fault location configuration information that host computer is arranged, and direct fault location configuration information is converted to gain control signal transfers to function daughter board; Function motherboard receives the failure voltage signal that the gain control circuit in function daughter board produces, and outputs it to tested exemplar; Gain control circuit on function daughter board realizes gain-adjusted jointly by integrated operational amplifier circuit chip and the input resistance supporting with it and feedback resistive network; The resistance of the input resistance of integrated operational amplifier circuit chip is set as 10k Ω; Feedback network is made up of relay and feedback resistance, and each relay is corresponding with feedback resistance to be connected, and in feedback resistance, the resistance of one of them feedback resistance is set as 1k Ω, and the resistance of remaining feedback resistance becomes 2 times of relations to increase progressively; Function motherboard provides control signal to relay, when relay control signal is high level, relay is failure to actuate, the feedback resistance be connected with this relay effectively accesses feedback network, when relay control signal is low level, the actuating of relay, the feedback resistance short circuit be connected with this relay, does not access feedback network; By the different combination of actions of relay, feedback network produces different effective access resistance values, and this scalar multiple effectively accessing resistance value and input resistance value changes thereupon, thus reaches the gain-adjusted effect to original input signal amplitude; The implantation step of direct fault location configuration information is,
Step 1: disconnect in tested exemplar the connecting line be injected between trouble unit, being serially connected in by injector through function daughter board is injected between trouble unit, and connect host computer and injector with RS232 serial port data line, switch on power subsequently, set up the data communication between host computer and injector;
Step 2: carry out direct fault location information configuration at host computer, comprises following three steps:
Step 2.1: select direct fault location form in host computer operation interface, comprises and continues injection, interval injection, stepping injection;
Step 2.2: according to direct fault location form selected in step 2.1, arrange controling parameters in host computer operation interface, if continue injection mode, then needs to arrange this parameter of initial gain; If interval injection mode, then need to arrange four parameters, comprise initial gain, inject the duration, inject interval time, inject number of times; If stepping injection mode, then need to arrange four parameters, comprise initial gain, single gain incremental step, cut-off gain, stepped intervals time;
Step 3: confirm controling parameters configuration result at host computer operation interface, subsequently, host computer is by RS232 serial data alignment injector sending controling instruction, and wherein, the content of steering order comprises the direct fault location form chosen in step 2.1, the concrete controling parameters arranged in step 2.2;
Step 4: injector receives from the steering order of host computer, and direct fault location operation is carried out to tested exemplar, comprise following five steps:
Step 4.1: current failure injects number of times and is designated as 0, makes current gain value equal the initial gain value of setting in step 2.2;
Step 4.2: the function motherboard of injector receives the raw voltage signals of input, and is sent to function daughter board, and this signal is exactly the input signal of function daughter board gain control circuit;
Step 4.3: the function motherboard of injector receives direct fault location configuration information that host computer arranges and is converted to gain control signal and transfers to function daughter board;
Step 4.4: function daughter board is according to the gain control instruction signal of function motherboard, the whether action of relay on controlling functions daughter board, thus the whether effective insertion gain control loop of the feedback resistance controlling to be connected with relay, regulate the gain of the raw voltage signals amplitude of input;
Step 4.5: the output voltage signal of gain control circuit is sent to function motherboard by function daughter board, by function motherboard, this signal is sent to tested exemplar as output fault-signal again, complete the operation of this direct fault location, simultaneously, make current failure inject number of times and add 1, make current gain value increase the single gain incremental step of setting in step 2.2;
Step 5: failure judgement injects form, comprises following three steps:
Step 5.1: if continue to inject, then terminate process;
Step 5.2: if interval is injected, judges whether current failure injection number of times is greater than the direct fault location number of times of step 2.2 setting: if be more than or equal to, then stop process; If be less than, then return step 4.2 and continue to perform;
Step 5.3: if stepping is injected, judges whether current gain value is greater than the cut-off gain of setting in step 2.2: if be more than or equal to cut-off yield value, then stop process; If be less than cut-off yield value, then return step 4.2 and continue to perform.
Be provided with four separate function daughter boards in described injector, each function daughter board can carry out separately direct fault location can carry out direct fault location again jointly.
The advantage that the present invention has and beneficial effect:
The present invention is directed to in, fault mode that the analog and digital signal of low frequency is relevant, propose a kind of voltage failure injector of adjustable gain.This device sends direct fault location configuration information by host computer to injector, and the gain control circuit controlled in injector, relay in drive circuit produces different combination of actions, thus regulate the feedback resistance resistance in Access Control loop, under the prerequisite not changing original signal phase place and frequency, gain-adjusted is carried out to the amplitude of signal, range of adjustment is 0 ~ 5.0 times of original signal gain, degree of regulation is 0.1 times, and the direct fault location precision of the dependent failure pattern of medium and low frequency analog and digital signal and scope are obtained for the expansion of high degree.Meanwhile, this voltage failure injector can realize continuing, interval, stepping direct fault location mode, enhance the controllability of this type direct fault location, simple operation, efficient.Given this, the present invention, from the angle realizing gain-adjusted more accurately, expands the range of application of Failure Injection Technique, to providing a kind of practicality, feasible new way for the checking of equipment Test design with evaluation.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of the voltage failure injector of a kind of adjustable gain of the present invention;
Fig. 2 is the real work line schematic diagram of the voltage failure injector of a kind of adjustable gain of the present invention;
Fig. 3 is gain control circuit schematic diagram;
Fig. 4 is the direct fault location process flow diagram of the voltage failure injector of illustrated a kind of adjustable gain.
In figure, symbol description is as follows:
RS232: serial data communication interface standard.
LRU1: the LRU 1 in tested exemplar, its output signal is the original input signal of fault injector.
LRU2: the LRU 2 in tested exemplar, its input signal is the fault-signal that fault injector exports.
R1 ~ R7, Rf1, Rf2, Ri: resistance.
K1 ~ K6:RELAY-T74 type relay.
C1, C2, C5, C6, C11, C12: electric capacity.
U1A and U1B:OPA2604AP type operational amplifier.
Vi: original input signal.
Vo': the signal that U1A exports after once anti-phase computing.
Vo1: the signal that U1B exports after the anti-phase computing of secondary is also the fault-signal that after injecting gain, fault injector exports.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.The voltage failure injector of this kind of adjustable gain, is characterized in that this device comprises: injector 1, host computer 2, as shown in Figure 1.This device is when real work, and need to be connected with tested exemplar 3, realize the direct fault location to tested exemplar, line schematic diagram as shown in Figure 2.A function daughter board can be comprised in the voltage failure injector of a kind of adjustable gain of the present invention, also multiple function daughter board can be comprised, the corresponding direct fault location passage of each function daughter board, both individual passage can have been utilized in use to carry out direct fault location, many passages can be used again simultaneously to carry out direct fault location.In present embodiment, be only described for the injector comprising 4 function daughter boards.
1) injector
Injector 1 comprises function motherboard 4, function daughter board A 5, function daughter board B 6, function daughter board C 7, function daughter board D 8.In addition, injector is provided with the separate passage in passage A, channel B, channel C, this four tunnel of passage D altogether, individual passage both can have been utilized to carry out direct fault location, many passages can be used again simultaneously to carry out direct fault location.
Function motherboard as the data-interface of injector, complete system power supply, with the data communication of host computer, original signal inputs, fault-signal exports, steering order signal produces function.Power supply chip LM2576-5.0 and LM7905 of function motherboard produces+5V and-5V power supply, completion system function of supplying power respectively.The MAX232 chip of function motherboard completes the serial communication function of injector and host computer.The master control core devices of function motherboard is STM32F0 type arm processor, it receives from host computer and imports the configuration parameter information of function motherboard through MAX232 chip into, jointly produce gain control signal with plug-in 4 74LS373, control the gain-adjusted that 4 pieces of function daughter boards carry out signal respectively.
The circuit design of function daughter board A, function daughter board B, function daughter board C, function daughter board D is identical and separate, each function daughter board includes gain control circuit, the parallel adjustment to these four channel input signal gains of A, B, C, D can be realized respectively.The signal gain Principles of Regulation of passage A are described for function daughter board A.Feedback network in gain control circuit is the core realizing gain-adjusted, this network can be made up of multiple relay and corresponding feedback resistance, in feedback resistance, the resistance of one of them feedback resistance is set as 1k Ω, and the resistance of remaining feedback resistance becomes 2 times of relations to increase progressively.In this example, adopt 6 RELAY-T74 type relays and 1k Ω, 2k Ω, 4k Ω, 8k Ω, these 6 kinds of feedback resistances of 16k Ω, 32k Ω to form the feedback network of gain control circuits, schematic diagram as shown in Figure 3.The feedback resistance that each Control is attached thereto whether insertion gain control loop.The gain control instruction signal sent when function motherboard, after the anti-phase driving of ULN2803 type relay driving chip in function daughter board A, can produce the control signal of relay, and this signal is " low effectively ".When this control signal is high level, relay is failure to actuate, the effective Access Control loop of the resistance be attached thereto; When this control signal is low level, the actuating of relay, the resistance be attached thereto is shorted shielding.By the different combination of actions of 6 relays, this feedback network can produce different feedback resistance value.In addition, gain control circuit is provided with two-stage circuit, and two OPA2604AP type operational amplifier U1A and U1B wherein successively respectively carry out once anti-phase computing, and the different feedback resistance value utilizing feedback network to produce complete the gain-adjusted to input signal.The transport function of this twice reverse computing is as follows respectively:
Wherein, V
o' be the output signal amplitude of operational amplifier U1A after the reverse computing of one-level;
V
o1for the output signal amplitude of operational amplifier U1B after the reverse computing of secondary;
V
ifor original input signal amplitude;
R
xfor feedback resistance, x=1,2 ..., 6, resistance is respectively 1k Ω, 2k Ω, 4k Ω, 8k Ω, 16k Ω, 32k Ω;
K
xfor RELAY-T74 type relay, x=1,2 ..., 6;
R
i, R
f2, R
7being resistance is 10k Ω resistance.
To sum up, by the different gain control signal received, gain control circuit drives six relays to produce different combination of actions, produces different effective access feedback resistance value thus, thus produce different gain-state, realize the gain-adjusted to original input signal.The feedback network that different actuating of relay combinations is corresponding effectively accesses the concrete distribution condition of resistance value and gain-state as shown in Table 1.Wherein, relay value is this actuating of relay of 1 expression, and corresponding feedback resistance is shorted; Relay value is that this relay of 0 expression is failure to actuate, the effective Access Control loop of corresponding feedback resistance.
Form 1 actuating of relay with effectively access resistance value and gain-state is corresponding shows
2) host computer
Host computer 2 is connected with injector through function motherboard, by embedded Fault Insertion Control Software, adopts the form of RS232 serial communication to injector sending controling instruction.
In addition, host computer can realize the control to injector three kinds of direct fault location modes, and these three kinds of control modes are continue injection, interval injection, stepping injection respectively.Lasting injection continues to inject gain incessantly to original input signal, and last till that injector quits work.It is inject gain to original input signal according to the interval time of specifying and duration that interval is injected, and after executing the injection number of times of specifying, cancels direct fault location.It is inject gain according to the initial gain of specifying, cut-off gain, interval time and stepping-in amount gain to original input signal that stepping is injected, and terminates the injection state that rear maintenance is last, until stop injecting.
3) tested exemplar
Tested exemplar 3 comprises LRU 9 and LRU 10, respectively referred to as LRU1 and LRU2.When tested exemplar normally works, LRU1 and LRU2 is connected, and signal is directly sent to LRU2 by LRU1.When utilizing injector to carry out direct fault location, the junction of LRU1 and LRU2 is direct fault location position, the connection between LRU1 and LRU2 need be disconnected, LRU1 and LRU2 is connected to injector respectively, raw voltage signals is inputted injector by LRU1, after host computer manipulation, injector exports failure voltage signal and is passed to LRU2, realizes the direct fault location process to tested exemplar.
4) fault filling method
Based on the voltage failure injector of described a kind of adjustable gain fault filling method as shown in Figure 3, the concrete steps of the method are as follows:
Step 1: disconnect the connecting line between LRU1 and the LRU2 in tested exemplar, through passage A, injector is serially connected between LRU1 and LRU2, and connect host computer and injector with RS232 serial port data line, subsequently connect injector ± 24V power supply, set up the data communication between host computer and injector.
Step 2: carry out controling parameters configuration at host computer, comprises following three steps:
Step 2.1: according to the actual line situation of electrical pumping device and tested exemplar, in host computer operation interface, selector channel A carries out follow-up direct fault location operation.
Step 2.2: select direct fault location form in host computer operation interface, comprises and continues injection, interval injection, stepping injection.
Step 2.3: controling parameters is set in host computer operation interface according to direct fault location form selected in step 2.2.If continue injection mode, then need to arrange this parameter of initial gain; If interval injection mode, then need to arrange four parameters, comprise initial gain, inject the duration, inject interval time, inject number of times; If stepping injection mode, then need to arrange four parameters, comprise initial gain, single gain incremental step, cut-off gain, stepped intervals time.
Step 3: confirm controling parameters configuration result at host computer operation interface, subsequently, host computer is by RS232 serial data alignment injector sending controling instruction.Wherein, the content of steering order comprises the concrete controling parameters arranged in the injector passage chosen in step 2.1, the direct fault location form selected in step 2.2, step 2.3.
Step 4: injector receives from the steering order of host computer, and direct fault location operation is carried out to tested exemplar, comprise following five steps:
Step 4.1: current failure injects number of times and is designated as 0, makes current gain value equal to make current gain value equal the initial gain value of setting in step 2.3.
Step 4.2: the function motherboard of injector receives the original input signal from LRU1 in tested exemplar and is sent to function daughter board A, and this signal is exactly the input signal of function daughter board A gain control circuit.
Step 4.3: the function motherboard of injector receives the direct fault location configuration information of host computer setting, and jointly produces gain control instruction Signal transmissions to function daughter board A by the arm processor on function motherboard and plug-in 74LS373 chip.
Step 4.4: the ULN2803 type relay driving chip of function daughter board A receives the gain control instruction signal from function motherboard, produces the control signal of relay, the relay K on controlling functions daughter board A after anti-phase driving
1~ K
6whether action, thus control feedback resistance R
1~ R
6whether effectively among insertion gain control loop.
Step 4.5: the output signal of gain control circuit is sent to function motherboard by function daughter board A, then by function motherboard, this signal is sent to LRU2 in tested exemplar as exporting fault-signal, complete the operation of this direct fault location.Meanwhile, make current failure inject number of times and add 1, make current gain value increase the single gain incremental step of setting in step 2.3.
Step 5: failure judgement injects form, comprises following three steps:
Step 5.1: if continue to inject, then terminate process.
Step 5.2: if interval is injected, judges whether current failure injection number of times is greater than the direct fault location number of times of step 2.3 setting: if be more than or equal to, then stop process; If be less than, then return step 4.2 and continue to perform.
Step 5.3: if stepping is injected, judges whether current gain value is greater than the cut-off gain of setting in step 2.3: if be more than or equal to cut-off yield value, then stop process; If be less than cut-off yield value, then return step 4.2 and continue to perform.
Wherein, described in step 1 to step 5.3 is only use the passage A of injector to carry out the operating process of direct fault location to a set of tested exemplar.To carry out direct fault location to the tested exemplar of many covers simultaneously, then need to perform all operations of step 1 to step 5.3 respectively to the passage A of injector, channel B, channel C, passage D, the passage A in step 1 to step 5.3 will become channel B, channel C, passage D according to actual service condition simultaneously.The fault injector of a kind of adjustable gain of the present invention can realize at most the direct fault location to the tested exemplar of four covers simultaneously.
Wherein, " initial gain " described in step 2.3 represents the concrete numerical value when the initial injection gain arranged in host computer operation interface, be exactly injector output signal voltage amplitude divided by the result obtained after original input signal voltage magnitude, the span of this gain is between 0.1 ~ 5.0 times.When direct fault location mode is stepping injection, initial gain is also the injection yield value when the direct fault location of execution first that host computer operation interface is arranged.
Wherein, " the injecting the duration " described in step 2.3 represents when direct fault location mode is interval injection, each duration of injecting gain.
Wherein, " the injecting interval time " described in step 2.3 represents when direct fault location mode is interval injection, from last time injection gain terminates to inject gain to this, and the time of these two interval of events.
Wherein, " the injection number of times " described in step 2.3 represents that total degree is injected in the gain arranged in host computer operation interface when direct fault location mode is interval injection, when total degree is injected in the gain that reality injection number of times reaches setting, stops injection.
Wherein, " single gain incremental step " described in step 2.3 represents when direct fault location mode is stepping injection, difference between the double injection gain that host computer operation interface is arranged is exactly the result obtained after this gain values injected deducts last injection gain values.In stepping injection mode, every twice continuous difference injected between gain is equal to single gain incremental step.
Wherein, " cut-off gain " described in step 2.3 represents when direct fault location mode is stepping injection, injection gain values when the last execution direct fault location that host computer operation interface is arranged, namely when this injection gain values is more than or equal to the cut-off gain of setting, stops injecting.
Wherein, " the stepped intervals time " described in step 2.3 represents when direct fault location mode is stepping injection, from last time injection gain terminates to inject gain to this, and interlude between these two events.
Claims (2)
1. the voltage failure injector of an adjustable gain, voltage failure injector comprises: host computer, injector, it is characterized in that: injector comprises function motherboard and function daughter board, function motherboard receives the raw voltage signals of tested exemplar input, and by this Signal transmissions to function daughter board; Function motherboard and host computer, by RS232 bus communication, receive the direct fault location configuration information that host computer is arranged, and direct fault location configuration information is converted to gain control signal transfers to function daughter board; Function motherboard receives the failure voltage signal that the gain control circuit in function daughter board produces, and outputs it to tested exemplar; Gain control circuit on function daughter board realizes gain-adjusted jointly by integrated operational amplifier circuit chip and the input resistance supporting with it and feedback resistive network; The resistance of the input resistance of integrated operational amplifier circuit chip is set as 10k Ω; Feedback network is made up of relay and feedback resistance, and each relay is corresponding with feedback resistance to be connected, and in feedback resistance, the resistance of one of them feedback resistance is set as 1k Ω, and the resistance of remaining feedback resistance becomes 2 times of relations to increase progressively; Function motherboard provides control signal to relay, when relay control signal is high level, relay is failure to actuate, the feedback resistance be connected with this relay effectively accesses feedback network, when relay control signal is low level, the actuating of relay, the feedback resistance short circuit be connected with this relay, does not access feedback network; By the different combination of actions of relay, feedback network produces different effective access resistance values, and this scalar multiple effectively accessing resistance value and input resistance value changes thereupon, thus reaches the gain-adjusted effect to original input signal amplitude; The implantation step of direct fault location configuration information is,
Step 1: disconnect in tested exemplar the connecting line be injected between trouble unit, being serially connected in by injector through function daughter board is injected between trouble unit, and connect host computer and injector with RS232 serial port data line, switch on power subsequently, set up the data communication between host computer and injector;
Step 2: carry out direct fault location information configuration at host computer, comprises following three steps:
Step 2.1: select direct fault location form in host computer operation interface, comprises and continues injection, interval injection, stepping injection;
Step 2.2: according to direct fault location form selected in step 2.1, arrange controling parameters in host computer operation interface, if continue injection mode, then needs to arrange this parameter of initial gain; If interval injection mode, then need to arrange four parameters, comprise initial gain, inject the duration, inject interval time, inject number of times; If stepping injection mode, then need to arrange four parameters, comprise initial gain, single gain incremental step, cut-off gain, stepped intervals time;
Step 3: confirm controling parameters configuration result at host computer operation interface, subsequently, host computer is by RS232 serial data alignment injector sending controling instruction, and wherein, the content of steering order comprises the direct fault location form chosen in step 2.1, the concrete controling parameters arranged in step 2.2;
Step 4: injector receives from the steering order of host computer, and direct fault location operation is carried out to tested exemplar, comprise following five steps:
Step 4.1: current failure injects number of times and is designated as 0, makes current gain value equal the initial gain value of setting in step 2.2;
Step 4.2: the function motherboard of injector receives the raw voltage signals of input, and is sent to function daughter board, and this signal is exactly the input signal of function daughter board gain control circuit;
Step 4.3: the function motherboard of injector receives direct fault location configuration information that host computer arranges and is converted to gain control signal and transfers to function daughter board;
Step 4.4: function daughter board is according to the gain control instruction signal of function motherboard, the whether action of relay on controlling functions daughter board, thus the whether effective insertion gain control loop of the feedback resistance controlling to be connected with relay, regulate the gain of the raw voltage signals amplitude of input;
Step 4.5: the output voltage signal of gain control circuit is sent to function motherboard by function daughter board, by function motherboard, this signal is sent to tested exemplar as output fault-signal again, complete the operation of this direct fault location, simultaneously, make current failure inject number of times and add 1, make current gain value increase the single gain incremental step of setting in step 2.2;
Step 5: failure judgement injects form, comprises following three steps:
Step 5.1: if continue to inject, then terminate process;
Step 5.2: if interval is injected, judges whether current failure injection number of times is greater than the direct fault location number of times of step 2.2 setting: if be more than or equal to, then stop process; If be less than, then return step 4.2 and continue to perform;
Step 5.3: if stepping is injected, judges whether current gain value is greater than the cut-off gain of setting in step 2.2: if be more than or equal to cut-off yield value, then stop process; If be less than cut-off yield value, then return step 4.2 and continue to perform.
2. the voltage failure injector of a kind of adjustable gain according to claim 1, is characterized in that, be provided with four separate function daughter boards in described injector, each function daughter board can carry out separately direct fault location can carry out direct fault location again jointly.
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| CN106338704A (en) * | 2015-07-14 | 2017-01-18 | 重庆龙源科技产业发展有限公司 | Real-time detection device suitable for failure and electricity larceny prevention of metering current transformer |
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| 李璠 等: "后驱动技术在故障注入中的退化机理的研究", 《测控技术》 * |
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| CN106338704A (en) * | 2015-07-14 | 2017-01-18 | 重庆龙源科技产业发展有限公司 | Real-time detection device suitable for failure and electricity larceny prevention of metering current transformer |
| CN105675925A (en) * | 2016-01-20 | 2016-06-15 | 中国航空综合技术研究所 | Cascade fault injection interface adapter of single-stage switch suitable for electronic product |
| CN105675925B (en) * | 2016-01-20 | 2018-07-24 | 中国航空综合技术研究所 | A kind of Mono-pole switch cascading failure grouting socket adapter suitable for electronic product |
| CN110032485A (en) * | 2019-04-17 | 2019-07-19 | 清华大学 | A kind of multi-core processor and its fault filling method |
| CN110032485B (en) * | 2019-04-17 | 2020-05-26 | 清华大学 | Multi-core processor and fault injection method thereof |
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| CN104391205B (en) | 2017-04-19 |
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