CN109541343A - A kind of self-sensing method of discrete magnitude output interface - Google Patents
A kind of self-sensing method of discrete magnitude output interface Download PDFInfo
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- CN109541343A CN109541343A CN201811372058.3A CN201811372058A CN109541343A CN 109541343 A CN109541343 A CN 109541343A CN 201811372058 A CN201811372058 A CN 201811372058A CN 109541343 A CN109541343 A CN 109541343A
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- discrete magnitude
- output interface
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- 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
Abstract
The invention belongs to avionicses, and in particular to a kind of self-sensing method of discrete magnitude output interface；The circuit isolation segmentation that method of the invention will need to detect by increasing auxiliary switch, carries out period self-test after merogenesis detection, including first power-on self-test；It is carried out sentencing ratio according to the negative voltage of the voltage of the voltage value of different acquisition point and input after merogenesis, and injection, the normal on-off working condition in decision circuitry；Self-detection circuit of the invention provides a kind of discrete magnitude output interface self-detection circuit, is quickly found with low cost, the realization discrete magnitude output interface failure of high stability, the self-checking function of quick response.
Description
Technical field
The invention belongs to avionicses, and in particular to a kind of self-sensing method of discrete magnitude output interface.
Background technique
In avionics field, discrete magnitude output interface is an especially important interface, as discrete magnitude output connects
The discrete signal (switching signal) of mouth output can directly or indirectly control the opening and closing of gasoline pump, if in flight course
Since discrete magnitude output interface failure leads to gasoline pump cisco unity malfunction, such as discovery alerts and implements corresponding measure not in time,
It centainly will cause serious consequence.For guarantee discrete magnitude output interface output correctness, stability and detectability, for specific
Discrete magnitude output interface circuit derive respective detection method, traditional self-sensing method is back production output order and output
Electrical signal status comparison judges whether consistent.Since conventional method back production loop is too long (from control command starting point to discrete magnitude
Output end), control is cumbersome, and midway through too many circuit, the reasons such as component failure rate height itself, cause at high cost and circuit
Testing result is unstable, and the response of even mistake cannot be timely responded to for the failure of generation.
Summary of the invention
The object of the present invention is to provide a kind of self-sensing methods of discrete magnitude output interface, and it is electromechanical to be suitable for aviation field
The self-test of discrete magnitude output interface in system, to solve, traditional self-sensing method intermediate ring road is too long, control is cumbersome caused
The technical issues of failure cannot timely respond to.
To solve this technical problem, the technical scheme is that
A kind of self-sensing method of discrete magnitude output interface, the self-sensing method of the discrete magnitude output interface first increase
The circuit isolation segmentation that auxiliary switch will need to detect, i.e. two switch A and switch B series connection, while the first collection point, second adopting
Collection point is located at the two sides switch B, then carries out merogenesis detection by period self-test after first power-on self-test.
Step 1: power-on self-test:
1.1, control switch A is closed, and switch B is disconnected, and acquires the voltage value of the first collection point, whether just detection input voltage
Often and switch A whether normally closed, in the process discrete magnitude export remain on line state；
1.2, control switch A is disconnected, and switch B closure injects negative voltage from the first collection point, acquires the electricity of the second collection point
Pressure value, detection switch B whether normally closed, in the process discrete magnitude output remain on line state；
1.3, acquisition differentiates:
1.3.1, the voltage value of collected first collection point and input voltage are compared, are then accused beyond threshold k 1
Alert, switch B is off-state, disconnects switch A；
1.3.2, the voltage value of collected second collection point and negative value are compared, then alerts, opens beyond threshold k 2
Pass A is off-state, disconnects switch B；
Step 2: period self-test:
2.1, it is closed in normal operating conditions switch A, the voltage of the first collection point of acquisition is acquired differentiation and executes step
Rapid 1.3.1,
2.2, the voltage for acquiring the second collection point is acquired differentiation:
When switch B closure: the voltage of the second collection point of acquisition is compared with input voltage, is then accused beyond threshold k 1
It is alert, disconnect switch A and switch B；
When switch B is disconnected: the voltage of the second collection point of acquisition is compared with no-voltage, is then alerted beyond threshold k 3,
Disconnect switch A.
The K1 is empirical value.
The K2 is empirical value.
The K3 is empirical value.
Preferably, the switch A is optical coupled switch, and the input terminal and output end electrical isolation of optical coupled switch, response is fast,
Strong antijamming capability, the operation is stable.
Preferably, the switch B is optical coupled switch.
Preferably, voltage is 28V on the machine.
Preferably, the negative voltage is -15V.
The beneficial effects of the present invention are: the self-sensing method of discrete magnitude output interface of the invention, in different working condition
The voltage value of lower monitoring collection point differentiates the validity of output interface.Monitoring point is separately positioned on the intermediate point of interface gateway,
The monitoring method of the monitoring voltage of this segmentation can reach front and back end isolation, failure is quickly found, the self-test mesh of quick response
's.The self-sensing method carries out segmentation detection to circuit, and loop is short, and response is fast, and used component is few in detection circuit,
At low cost, control is simple and bring failure rate is low, and testing result is stablized.
Detailed description of the invention
Fig. 1 is discrete magnitude output interface self-sensing method schematic diagram of the invention；
Fig. 2 is 1 schematic diagram of discrete magnitude output interface self-sensing method state of the invention；
Fig. 3 is 2 schematic diagram of discrete magnitude output interface self-sensing method state of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples:
Referring to Fig. 1 to Fig. 3, discrete magnitude output interface self-sensing method of the invention is done and is further retouched in detail
It states.
Input voltage is the voltage on machine in the present embodiment, is 28V, the negative voltage of injection is -15V, according to selection
Input voltage, the value by experience setting K1 are (± 5.6V), and the value of K2 is (± 3V), and the value of K3 is (± 0.3V), figure
Shown in AS be the first collection point, BS be the second collection point.Specific step is as follows:
Power-on self-test: as shown in Figure 1, being with the self-sensing method schematic diagram that 28V/ opens the discrete magnitude output interface of type
Example.
Step 1: control optical coupled switch A closure, optical coupled switch B are disconnected, such as Fig. 2.With the side of traditional acquisition analog voltage
Formula acquires the voltage value of the first collection point AS, with this come detect whether input voltage 28V normal, optical coupled switch A whether can be normal
Closure/disconnection.Discrete magnitude output in the process remains on line state；
Step 2: control optical coupled switch A is disconnected, optical coupled switch B closure, such as Fig. 3.Negative voltage-is injected from the first collection point AS
15V acquires the voltage value of the second collection point BS.Detect optical coupled switch B whether can normally closed/disconnection with this.In this process
Middle discrete magnitude output remains on line state.
Step 3: during power-on self-test the voltage value of collected first collection point AS and the second collection point BS respectively and
Input voltage and injection negative value compare, and alert, break if the first collection point AS voltage value is beyond input voltage (± 5.6V)
Optical coupled switch A is opened, optical coupled switch B is off-state at this time；The voltage value of second collection point BS beyond injection negative value (±
It 3V) then alerts, disconnects optical coupled switch B, optical coupled switch A is off-state at this time.
Period self-test: as shown in Figure 2.
Step 1: setting optical coupled switch A is closed always in normal operation.Optical coupled switch B is closed according to control command
It closes or disconnects, realize that 28V/ opens the output of type discrete magnitude；
Step 2: using the mode of traditional acquisition analog voltage, differentiation is acquired to the voltage of the first collection point AS,
Differentiation is acquired to the voltage of the second collection point BS；
Step 3: the voltage value of the first collection point AS is acquired under cycling state compared with input voltage, if first adopts
Collection point AS voltage value is then alerted beyond input voltage value (± 5.6V), disconnects optical coupled switch A and B；
Step 4: the voltage value of the second collection point BS is acquired under cycling state, when optical coupled switch B closure: second
The voltage value of collection point BS is compared with input voltage value, is then alerted beyond input voltage value (± 5.6V), is disconnected optocoupler and is opened
Close A and B；When optical coupled switch B disconnect when: the voltage value of the second collection point BS is compared with no-voltage, exceed zero voltage value (±
It 0.3V) then alerts, disconnects optical coupled switch A, optical coupled switch B is off-state at this time.
Claims (8)
1. a kind of self-sensing method of discrete magnitude output interface, it is characterised in that: the self-test of the discrete magnitude output interface
Method first increases the circuit isolation segmentation that auxiliary switch will need to detect, i.e., two switch A and switch B connect, while first adopts
Collection point, the second collection point are located at the two sides switch B, then carry out merogenesis detection by period self-test after first power-on self-test.
2. the self-sensing method of discrete magnitude output interface according to claim 1, it is characterised in that: the power-on self-test
Process it is as follows:
1.1, control switch A be closed, switch B disconnect, acquire the first collection point voltage value, detect input voltage whether normally with
And switch A whether normally closed, in the process discrete magnitude output remain on line state；
1.2, control switch A is disconnected, and switch B closure injects negative voltage from the first collection point, acquires the voltage of the second collection point
Value, detection switch B whether normally closed, in the process discrete magnitude output remain on line state；
1.3, acquisition differentiates:
1.3.1, the voltage value of collected first collection point and input voltage are compared, then alert, opens beyond threshold k 1
Pass B is off-state, disconnects switch A；
1.3.2, the voltage value of collected second collection point and negative value are compared, is then alerted beyond threshold k 2, switch A is
Off-state disconnects switch B.
3. the self-sensing method of discrete magnitude output interface according to claim 1, it is characterised in that: the period self-test
Process is as follows:
3.1, it is in normal operating conditions switch A to be closed, the voltage of the first collection point of acquisition is acquired differentiation execution and powers on certainly
The step 1.3.1 of inspection；
3.2, the voltage for acquiring the second collection point is acquired differentiation:
When switch B closure: the voltage of the second collection point of acquisition is compared with input voltage, is then alerted beyond threshold k 1, is broken
Switch A and switch B；
When switch B is disconnected: the voltage of the second collection point of acquisition is compared with no-voltage, is then alerted beyond threshold k 3, is disconnected
Switch A.
4. the self-sensing method of discrete magnitude output interface according to claim 1, it is characterised in that: described K1, K2, the K3
For empirical value.
5. the self-sensing method of discrete magnitude output interface according to any one of claims 1 to 4, it is characterised in that: described
Switch A be optical coupled switch.
6. the self-sensing method of discrete magnitude output interface according to any one of claims 1 to 4, it is characterised in that: described
Switch B be optical coupled switch.
7. the self-sensing method of discrete magnitude output interface according to any one of claims 1 to 4, it is characterised in that: described
Machine on voltage be 28V.
8. the self-sensing method of discrete magnitude output interface according to any one of claims 1 to 4, it is characterised in that: described
Negative voltage be -15V.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110457168A (en) * | 2019-07-02 | 2019-11-15 | 中国航空工业集团公司雷华电子技术研究所 | A kind of low-speed interface self-sensing method for data processing |
| CN110542848A (en) * | 2019-09-20 | 2019-12-06 | 天津津航计算技术研究所 | Discrete magnitude acquisition power-on BIT self-detection circuit based on micro relay |
| CN111007391A (en) * | 2019-11-08 | 2020-04-14 | 中国船舶重工集团公司第七0七研究所九江分部 | Switching signal acquisition self-test circuit |
| CN113467318A (en) * | 2021-07-20 | 2021-10-01 | 四川腾盾科技有限公司 | Discrete signal output system and method for unmanned aerial vehicle airplane management computer |
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| CN109541343B (en) | 2021-02-09 |
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