CN204028695U - A kind of multi-functional fault-signal analogue means - Google Patents
A kind of multi-functional fault-signal analogue means Download PDFInfo
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- CN204028695U CN204028695U CN201420453159.4U CN201420453159U CN204028695U CN 204028695 U CN204028695 U CN 204028695U CN 201420453159 U CN201420453159 U CN 201420453159U CN 204028695 U CN204028695 U CN 204028695U
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Abstract
The utility model proposes a kind of multi-functional fault-signal analogue means.The utility model comprises fault simulation circuit, for controlling control module and the power circuit of fault simulation circuit, described power circuit provides power supply for fault simulation circuit and control circuit, it is characterized in that: described fault simulation circuit is divided into two parts according to function, be respectively short-circuit function module and loose contact functional module; In short-circuit function module, control module is sent steering order, the folding of pilot relay, thus select different fault access signals; In loose contact functional module, in the middle of fault simulation equipment access controlled system, control mos pipe by PWM closed, produce the effect of loose contact, thereby reach loose contact fault simulation.The utility model has increased the coverage rate of fault simulation equipment simulating fault, more comprehensively test control system.
Description
Technical field
The utility model relates to signal simulation technical field, especially relates to a kind of device of multi-functional fault-signal simulation.
Background technology
Along with the development and improvement of modern control technology, fault detection capability has become the requisite part of control system, and the fault detection capability of function admirable and broad covered area becomes evaluates the important index of control system.Fault detection capability, in the time that system breaks down, can detect in time fault and make corresponding measure to avoid causing great loss.In numerous system failures, electric fault be most important be also one of fault of the most easily causing heavy losses, for test failure detection system is for the measuring ability of electric fault, need to simulate the electric fault of system, by in the fault injection control system of simulation, observe the reaction of control system for electric fault.
The method of now conventional simulated failure signal has a lot, wherein conventional method is access fault simulation equipment in the middle of controlled system, control module control fault simulation equipment simulating by control system or fault simulation equipment goes out all kinds of fault-signals, analog machine can simulating signal over the ground, to faults such as power supplys, detect the fault detection capability of control system by observing the control signal of control system.But along with everybody is for the more and more attention of security of system, the fault-signal of conventional fault simulation equipment simulating can not meet growing demand, for example publication number is that the patent documentation of CN 102508452 A discloses a kind of analog board that can simulate various faults, comprise: Gu high (to power supply short circuit), some conventional fault-signals such as low Gu (shorted to earths), but in this patent, do not comprise in electric fault short circuit and loose contact fault-signal between the normal signal occurring and signal, conventional fault type can not meet the requirement of control of conditions system for security performance, therefore need to develop a kind of fault simulation equipment that comprises short circuit between signal and signal and loose contact on the basis of conventional fault analog machine.
Summary of the invention
For above-mentioned technological deficiency, the utility model proposes a kind of device of multi-functional fault-signal simulation.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows:
The utility model comprises the main circuit module of fault simulation, for controlling control module and the power module of fault simulation circuit, described power module provides power supply for main circuit module and control circuit, described main circuit module is divided into two parts according to function, is respectively conventional func module and loose contact functional module.
In described conventional func module, the pin 6 of relay K 1 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with output pin with 7 by pin 2, after K1 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 and 5 signals are unsettled, the pin 1 of relay K 1 connects power supply signal, pin 8 is connected to the ground by capacitor C 1 and mos pipe T1 respectively, the pin 3 of mos pipe T1 is connected to the ground, the pin 1 of mos pipe T1 is connected with resistance R 1, the other end of resistance R 1 is connected with control signal CH1_CTRL1, resistance R 2 and capacitor C 2 two ends are connected respectively pin 1 and the earth signal of mos pipe T1, the pin 6 of relay K 2 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with 3 with the pin 6 of relay K 3 with 7 by pin 2, after mos pipe T2 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with external signal EXT with 5 signals, relay K 2 pins 1 connect power supply signal, pin 8 is connected to the ground by C3 and mos pipe T2 respectively, the pin 3 of mos pipe T2 is connected to the ground, the pin 1 of mos pipe T2 is connected with resistance R 3, the other end of resistance R 3 is connected with control signal CH1_CTRL4, resistance R 4 and capacitor C 4 two ends are connected respectively pin 1 and the earth signal of mos pipe T2, the pin 6 of relay K 3 is connected with 7 with the pin 2 of relay K 2 with one end of pin 3, the other end is by pin 2, 7 are connected with 3 with the pin 6 of relay K 4, after T3 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with power supply signal VBATT with 5 signals, relay K 3 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 5 and mos pipe T3 respectively, the pin 3 of mos pipe T3 is connected to the ground, the pin 1 of T3 is connected with resistance R 5 one end, the other end of resistance R 5 is connected with control signal CH1_CTRL2, resistance R 6 and capacitor C 6 two ends are connected respectively pin 1 and the earth signal of mos pipe T3, the pin 6 of relay K 4 is connected with 7 with the pin 2 of relay K 3 with one end of pin 3, the other end is unsettled by pin 2 and 7, after T4 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with earth signal PGND with 5 signals, relay K 4 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 7 and mos pipe T4 respectively, the pin 3 of mos pipe T4 is connected to the ground, the pin 1 of mos pipe T4 is connected with one end of resistance R 7, the other end of resistance R 7 is connected with control signal CH1_CTRL3, resistance R 8 and capacitor C 8 two ends are connected respectively pin 1 and the earth signal of mos pipe T4.
In described loose contact functional module, the pin 1 of mos pipe T5 is connected with one end, one end of resistance R 9 and one end of capacitor C 9 of resistance R 10 respectively, another termination CH2_CTR1 control signal of resistance R 10, the other end ground connection of the other end of resistance R 9 and capacitor C 9, the pin 2 of mos pipe T5 meets the output CH2_OUT of system under test (SUT), and the pin 3 of mos pipe T5 meets the output CH2_IN of system under test (SUT)
The beneficial effects of the utility model are: on the basis of original fault simulation equipment, add short circuit between signal and signal, and two fault-signals of loose contact signal, increase the coverage rate of fault simulation equipment simulating fault, more comprehensively test control system.
Brief description of the drawings
Fig. 1 fault simulation equipment overall structure figure;
Fig. 2 conventional func modular circuit schematic diagram;
Fig. 3 loose contact function module circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model comprise fault simulation circuit, for controlling control module and the power circuit of fault simulation circuit.Described power circuit provides power supply for fault simulation circuit and control circuit, and described fault simulation circuit is divided into two parts according to function, is respectively conventional func module and loose contact functional module.
In conventional func module, control module is sent steering order, the folding of pilot relay, thereby select different fault access signals, the fault-signal that can select by relay has: shorted to earth signal, and to power supply short circuit signal, to outside signal shorts signal and chopping signal.Wherein can select to allow two different signals to same external signal short circuit by relay to outside signal shorts signal, and produce the function of short trouble between signal and signal.
In loose contact functional module, need simulating contact bad error signal, in the middle of fault simulation equipment access controlled system, control mos pipe by PWM closed, produce the effect of loose contact, thereby reach loose contact fault simulation.
In conventional func module as shown in Figure 2, the pin 6 of relay K 1 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with output pin with 7 by pin 2, after K1 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 and 5 signals are unsettled, the pin 1 of relay K 1 connects power supply signal, pin 8 is connected to the ground by capacitor C 1 and mos pipe T1 respectively, the pin 3(source electrode of mos pipe T1) be connected to the ground, the pin 1(grid of mos pipe T1) be connected with resistance R 1, the other end of resistance R 1 is connected with control signal CH1_CTRL1, resistance R 2 and capacitor C 2 two ends are connected respectively pin 1 and the earth signal of mos pipe T1, the pin 6 of relay K 2 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with 3 with the pin 6 of relay K 3 with 7 by pin 2, after mos pipe T2 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with external signal EXT with 5 signals, relay K 2 pins 1 connect power supply signal, pin 8 is connected to the ground by C3 and mos pipe T2 respectively, the pin 3 of mos pipe T2 is connected to the ground, the pin 1 of mos pipe T2 is connected with resistance R 3, the other end of resistance R 3 is connected with control signal CH1_CTRL4, resistance R 4 and capacitor C 4 two ends are connected respectively pin 1 and the earth signal of mos pipe T2, the pin 6 of relay K 3 is connected with 7 with the pin 2 of relay K 2 with one end of pin 3, the other end is by pin 2, 7 are connected with 3 with the pin 6 of relay K 4, after T3 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with power supply signal VBATT with 5 signals, relay K 3 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 5 and mos pipe T3 respectively, the pin 3 of mos pipe T3 is connected to the ground, the pin 1 of T3 is connected with resistance R 5 one end, the other end of resistance R 5 is connected with control signal CH1_CTRL2, resistance R 6 and capacitor C 6 two ends are connected respectively pin 1 and the earth signal of mos pipe T3, the pin 6 of relay K 4 is connected with 7 with the pin 2 of relay K 3 with one end of pin 3, the other end is unsettled by pin 2 and 7, after T4 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with earth signal PGND with 5 signals, relay K 4 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 7 and mos pipe T4 respectively, the pin 3 of mos pipe T4 is connected to the ground, the pin 1 of mos pipe T4 is connected with one end of resistance R 7, the other end of resistance R 7 is connected with control signal CH1_CTRL3, resistance R 8 and capacitor C 8 two ends are connected respectively pin 1 and the earth signal of mos pipe T4, in the circuit of control module by CH1_IN and CH1_OUT access system under test (SUT), wherein CH1_CTRL1 is open circuit fault control signal, CH1_CTRL2 is to power supply short circuit fault control system, CH1_CTRL3 is shorted to earth failure control signal, and CH1_CTRL4 is to outside signal shorts control signal.In the time of CH1_CTRL1 output low level, relay K 1 is failure to actuate, and relay K 1 pin 3 is connected with pin 2, pin 6 is connected with pin 7, and system under test (SUT) is in normal mode of operation, in the time of CH1_CTRL1 output high level, relay K 1 is opened, relay K 1 pin 3 and pin 4, and pin 6 is connected with pin 5, system under test (SUT), in off state, causes open circuit fault; When CH1_CTRL1 output low level, when CH1_CTRL4 output high level, relay T2 is opened, external signal EXT is access in system under test (SUT), in the time that another signal of system under test (SUT) is also access in external signal EXT simultaneously, the signal of these two systems under test (SUT), by short circuit, causes the short trouble between system under test (SUT) signal and signal; When CH1_CTRL1 output low level, CH1_CTRL4 output low level, when CH1_CTRL2 output high level, relay K 3 is opened, and system under test (SUT) signal is connected with power supply signal VBATT signal, causes and power supply short circuit fault; When CH1_CTRL1 output low level, CH1_CTRL4 output low level, CH1_CTRL2 output low level, CH1_CTRL3 exports high level, and relay K 4 is opened, and system under test (SUT) signal is connected with earth signal, causes shorted to earth fault.
In as Fig. 3 loose contact functional module, need simulating contact bad error signal, in loose contact fault simulation, in the middle of loose contact fault simulation equipment access controlled system, the pin 1 of mos pipe T5 respectively with one end of resistance R 10, one end of resistance R 9 is connected with one end of capacitor C 9, another termination CH2_CTR1 control signal of resistance R 10, the other end ground connection of the other end of resistance R 9 and capacitor C 9, the pin 2 of mos pipe T5 meets the output CH2_OUT of system under test (SUT), the pin 3 of mos pipe T5 meets the output CH2_IN of system under test (SUT), by controlling the closure of CH2_CTR1 control signal control mos pipe T5, control signal is PWM ripple, therefore can simulate the effect that produces loose contact, thereby reach loose contact fault simulation.
A kind of loose contact failure simulation method, should be noted following some:
1) frequency of operation of common relay is lower, and is not suitable for the simulation as loose contact fault, need to use mos pipe as control element;
2), because the withstand voltage of N-type mos pipe is high, bear that current capacity is strong and price comparison is cheap, so select N-type mos as control element;
3) connect the input end of controlled system in the leakage level of mos pipe, source class connects the output terminal of controlled system, gate leve connects the control signal of mos pipe, because the state of source class is unknown (may be that high level may be also low level), therefore produce control signal by charge pump booster circuit, can under high level and low level two states, all realize effect of controlling.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, without departing from the concept of the premise utility; can also make some improvements and modifications, these improvements and modifications also should be considered as in the utility model protection domain.
Claims (1)
1. a multi-functional fault-signal analogue means, comprise the main circuit module of fault simulation, for controlling control module and the power module of fault simulation circuit, it is characterized in that: described power module provides power supply for main circuit module and control circuit, described main circuit module is divided into two parts according to function, is respectively conventional func module and loose contact functional module;
In described conventional func module, the pin 6 of relay K 1 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with output pin with 7 by pin 2, after K1 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 and 5 signals are unsettled, the pin 1 of relay K 1 connects power supply signal, pin 8 is connected to the ground by capacitor C 1 and mos pipe T1 respectively, the pin 3 of mos pipe T1 is connected to the ground, the pin 1 of mos pipe T1 is connected with resistance R 1, the other end of resistance R 1 is connected with control signal CH1_CTRL1, resistance R 2 and capacitor C 2 two ends are connected respectively pin 1 and the earth signal of mos pipe T1, the pin 6 of relay K 2 is connected with one end of pin 3 and the input pin of system under test (SUT), the other end is connected with 3 with the pin 6 of relay K 3 with 7 by pin 2, after mos pipe T2 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with external signal EXT with 5 signals, relay K 2 pins 1 connect power supply signal, pin 8 is connected to the ground by C3 and mos pipe T2 respectively, the pin 3 of mos pipe T2 is connected to the ground, the pin 1 of mos pipe T2 is connected with resistance R 3, the other end of resistance R 3 is connected with control signal CH1_CTRL4, resistance R 4 and capacitor C 4 two ends are connected respectively pin 1 and the earth signal of mos pipe T2, the pin 6 of relay K 3 is connected with 7 with the pin 2 of relay K 2 with one end of pin 3, the other end is by pin 2, 7 are connected with 3 with the pin 6 of relay K 4, after T3 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with power supply signal VBATT with 5 signals, relay K 3 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 5 and mos pipe T3 respectively, the pin 3 of mos pipe T3 is connected to the ground, the pin 1 of T3 is connected with resistance R 5 one end, the other end of resistance R 5 is connected with control signal CH1_CTRL2, resistance R 6 and capacitor C 6 two ends are connected respectively pin 1 and the earth signal of mos pipe T3, the pin 6 of relay K 4 is connected with 7 with the pin 2 of relay K 3 with one end of pin 3, the other end is unsettled by pin 2 and 7, after T4 opens, pin 6 can be connected with 5 with pin 4 with 3, and pin 4 is connected with earth signal PGND with 5 signals, relay K 4 pins 1 connect power supply signal, pin 8 is connected to the ground by capacitor C 7 and mos pipe T4 respectively, the pin 3 of mos pipe T4 is connected to the ground, the pin 1 of mos pipe T4 is connected with one end of resistance R 7, the other end of resistance R 7 is connected with control signal CH1_CTRL3, resistance R 8 and capacitor C 8 two ends are connected respectively pin 1 and the earth signal of mos pipe T4,
In described loose contact functional module, the pin 1 of mos pipe T5 is connected with one end, one end of resistance R 9 and one end of capacitor C 9 of resistance R 10 respectively, another termination CH2_CTR1 control signal of resistance R 10, the other end ground connection of the other end of resistance R 9 and capacitor C 9, the pin 2 of mos pipe T5 meets the output CH2_OUT of system under test (SUT), and the pin 3 of mos pipe T5 meets the output CH2_IN of system under test (SUT).
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| CN201420453159.4U CN204028695U (en) | 2014-08-12 | 2014-08-12 | A kind of multi-functional fault-signal analogue means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976601A (en) * | 2017-10-20 | 2018-05-01 | 广州小鹏汽车科技有限公司 | A kind of fault diagnosis circuit and method for NTC temperature acquisition circuits |
| CN109188295A (en) * | 2018-09-06 | 2019-01-11 | 广州锦红源电子科技有限公司 | Battery cell failure simulator |
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2014
- 2014-08-12 CN CN201420453159.4U patent/CN204028695U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976601A (en) * | 2017-10-20 | 2018-05-01 | 广州小鹏汽车科技有限公司 | A kind of fault diagnosis circuit and method for NTC temperature acquisition circuits |
| CN109188295A (en) * | 2018-09-06 | 2019-01-11 | 广州锦红源电子科技有限公司 | Battery cell failure simulator |
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