CN113359056A - Power validity self-detection circuit - Google Patents
Power validity self-detection circuit Download PDFInfo
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- CN113359056A CN113359056A CN202110608205.8A CN202110608205A CN113359056A CN 113359056 A CN113359056 A CN 113359056A CN 202110608205 A CN202110608205 A CN 202110608205A CN 113359056 A CN113359056 A CN 113359056A
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- 238000001514 detection method Methods 0.000 title claims abstract description 81
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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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
- G01R31/40—Testing power supplies
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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
- G01R31/34—Testing dynamo-electric machines
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- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application provides a power validity self-checking circuit, the circuit includes: the multiplexer adds BIT detection excitation corresponding to the BIT detection address to a corresponding self-detection circuit according to the BIT detection address, closes a first comparator in the corresponding self-detection circuit, and forms partial voltage between a first resistor and a second resistor connected between the first comparator and a preset value power supply so as to generate self-detection voltage smaller than the preset power supply, the second comparator compares the self-detection voltage with reference voltage corresponding to the preset value power supply, when the comparison result meets the requirement, the second comparator generates a power self-detection effective signal, and when the comparison result does not meet the requirement, the second comparator generates a power self-detection invalid signal. The effectiveness of the important power supply signal of the servo actuation system can be judged, so that reference is provided for the effectiveness of the servo actuation system in judging the channel, and the safety of the servo actuation system is improved.
Description
Technical Field
The application belongs to the technical field of self-detection of actuating systems, and particularly relates to a method and a device for identifying characteristic parameters of an interval link on line based on line segment fitting.
Background
The servo actuation system is one of the key systems of the aircraft, and mainly plays a role in executing operation commands, and the servo actuation system is concerned about the flight safety of the aircraft. Since the servo actuation system is controlled by a primary power supply (+28V) and a secondary power supply (+5V, +15V, -15V, etc.), it is necessary to perform self-detection in order to determine whether the important power supply of the servo actuation system is valid.
Disclosure of Invention
The application aims to provide a power validity self-detection circuit, which can judge the validity of an important power signal when a servo actuating system executes self-detection.
The technical scheme provided by the application is as follows: a power supply validity self-detection circuit, the circuit comprising:
the multiplexer adds BIT detection excitation corresponding to the BIT detection address to a corresponding self-detection circuit according to the BIT detection address, closes a first comparator in the corresponding self-detection circuit, and forms partial voltage between a first resistor and a second resistor connected between the first comparator and a preset value power supply to generate self-detection voltage smaller than the preset value power supply, the second comparator compares the self-detection voltage with reference voltage corresponding to the preset value power supply to generate a power source detection effective signal when a comparison result meets a requirement, and generates a power source detection invalid signal when the comparison result does not meet the requirement to realize validity detection of the multi-path power supply.
Further, the self-detection circuit includes:
the analog switch is connected with the multiplexer at one side and connected with the first comparator at the other side;
one path of the first comparator is connected with the analog switch and the ground, and the other path of the first comparator is connected with a preset voltage value through a first resistor and a second resistor; and
and one path of the second comparator is connected between the first resistor and the second resistor, and the other path of the second comparator is connected with a reference voltage.
Further, the resistance values of the first resistor and the second resistor are determined according to requirements.
Further, the BIT detection address of the multiplexer is not less than the number of the self-detection circuits.
Furthermore, the analog switch completes the connection and disconnection according to the BIT detection enabling signal output by the servo actuating system.
Further, the voltage of the power source with the predetermined value includes but is not limited to +5V, +15V, -15V, + 28V.
Further, the difference between the reference voltage and the self-detection voltage is not more than 5%.
The power validity self-detection circuit provided by the application can judge the validity of the important power signal of the servo actuating system, so that reference is provided for the validity of the judging channel of the servo actuating system, and the safety of the servo actuating system is improved.
Drawings
In order to more clearly illustrate the technical solutions provided by the present application, the following briefly introduces the accompanying drawings. It is to be expressly understood that the drawings described below are only illustrative of some embodiments of the invention.
Fig. 1 is a schematic diagram of a power validity self-detection circuit according to the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
In order to judge the effectiveness of an important power supply of a servo braking system, the application provides a power supply effectiveness self-detection circuit.
As shown in fig. 1, the power validity self-detection circuit provided by the present application includes:
the multiplexer adds BIT detection excitation corresponding to the BIT detection address to a corresponding self-detection circuit according to the BIT detection address, closes a first comparator in the corresponding self-detection circuit, and forms partial voltage between a first resistor and a second resistor connected between the first comparator and a preset value power supply to generate self-detection voltage smaller than the preset value power supply, the second comparator compares the self-detection voltage with reference voltage corresponding to the preset value power supply to generate a power source detection effective signal when a comparison result meets a requirement, and generates a power source detection invalid signal when the comparison result does not meet the requirement to realize validity detection of the multi-path power supply.
Further, the self-detection circuit includes: a BIT enabling switch with one side connected with the multiplexer and the other side connected with the first comparator; one path of the first comparator is connected with the BIT enabling switch, one path of the first comparator is grounded, and the other path of the first comparator is connected to a preset voltage value through a first resistor and a second resistor; and a second comparator, one path of which is connected between the first resistor and the second resistor, and the other path of which is connected with a reference voltage.
The resistance values of the first resistor and the second resistor are determined according to needs, so that the voltage output after voltage division is the same as or similar to the reference voltage.
In the present application, the BIT enable switch completes the on/off according to the BIT detection enable signal output by the servo actuation system.
In the present application, the voltage of the predetermined value power source includes but is not limited to +5V, +15V, -15V, +28V, and the difference between the reference voltage and the predetermined value power source voltage is not more than 5% to ensure that the detected power source validity has high accuracy and reliability.
In order to ensure that the required detected power supply can be detected, the BIT detection address of the multiplexer in the application is not less than the number of the self-detection circuits.
Since the servo brake system needs to perform self-detection on a plurality of power signals, the selection is performed through the multiplexer in the application. Different power supply signals are selected for self-detection by configuring different gating addresses, and the following description is given by using a 5V power supply, and other voltage value power supplies are not described in detail.
Due to the high reliability requirement of the servo actuating system, the power validity self-detection circuit has double protection measures, namely BIT detection enabling and BIT detection excitation, the on and off of the analog switch can be controlled through BIT detection enabling, and the output of the comparator 1 at the rear end can be controlled to be grounded or disconnected through BIT detection excitation.
When the servo actuating system performs self-detection on the +5V power supply, the output BIT detection enabling signal is effective, and the signal enables the analog switch to be conducted. The configured BIT detection address is gated to a +5V self-detection circuit, BIT detection excitation is output to a comparator 1 at the rear end, the BIT detection excitation is analog controllable voltage (5V +/-0.1V), the analog controllable voltage is selected according to specific conditions, a +5V power supply signal is compared with a reference voltage signal 4.75V through a comparator 2, and a discrete signal 0/1, namely a +5V power supply effective signal 1 or an invalid signal 0, is output.
When the BIT detection excitation is 5V, one end of the comparator 1, which is arranged at the second resistor R2, is grounded, so that the partial voltage of the 5V detected voltage at the front end of the comparator 1 is less than 4.75V and lasts for a certain time, and a +5V power supply invalid signal is generated; when the BIT detection excitation is 0V, the comparator 1 is disconnected with one end of the second resistor R2, so that the voltage division of 5V at the front end of the second comparator 2 is greater than 4.75V and lasts for a certain time, and a +5V power supply effective signal is generated.
The power supply effective self-detection circuit can judge the effectiveness of important power supply signals of the servo actuating system and provides reference for the effectiveness of a judging channel of the servo actuating system, so that the safety of the servo actuating system is improved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A power supply validity self-detection circuit, the circuit comprising:
the multiplexer adds BIT detection excitation corresponding to the BIT detection address to a corresponding self-detection circuit according to the BIT detection address, closes a first comparator in the corresponding self-detection circuit, and forms partial voltage between a first resistor and a second resistor connected between the first comparator and a preset value power supply to generate self-detection voltage smaller than the preset value power supply, the second comparator compares the self-detection voltage with reference voltage corresponding to the preset value power supply to generate a power source detection effective signal when a comparison result meets a requirement, and generates a power source detection invalid signal when the comparison result does not meet the requirement to realize validity detection of the multi-path power supply.
2. The power availability self-detection circuit of claim 1, wherein the self-detection circuit comprises:
the analog switch is connected with the multiplexer at one side and connected with the first comparator at the other side;
one path of the first comparator is connected with the analog switch and the ground, and the other path of the first comparator is connected with a preset voltage value through a first resistor and a second resistor; and
and one path of the second comparator is connected between the first resistor and the second resistor, and the other path of the second comparator is connected with a reference voltage.
3. The power source validity self-test circuit according to claim 2, wherein the resistances of the first resistor and the second resistor are determined as necessary.
4. The power validity self-test circuit according to claim 1 or 2, wherein the BIT test address of the multiplexer is not less than the number of self-test circuits.
5. The circuit for self-checking power availability according to claim 1, wherein the analog switch is turned on and off according to a BIT detection enable signal outputted from the servo actuation system.
6. The power validity self-test circuit of claim 3, wherein the voltage of the predetermined value power supply includes but is not limited to +5V, +15V, -15V, + 28V.
7. The power source validity self-detection circuit of claim 5, wherein the reference voltage and the self-detection voltage do not differ by more than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110608205.8A CN113359056A (en) | 2021-06-01 | 2021-06-01 | Power validity self-detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110608205.8A CN113359056A (en) | 2021-06-01 | 2021-06-01 | Power validity self-detection circuit |
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| CN113359056A true CN113359056A (en) | 2021-09-07 |
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| CN202110608205.8A Pending CN113359056A (en) | 2021-06-01 | 2021-06-01 | Power validity self-detection circuit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6118295A (en) * | 1997-04-16 | 2000-09-12 | Nec Corporation | Power supply voltage detection device |
| KR20070047718A (en) * | 2005-11-02 | 2007-05-07 | 가부시끼가이샤 도시바 | Power supply circuit |
| CN101025654A (en) * | 2006-02-24 | 2007-08-29 | 恩益禧电子股份有限公司 | Power supply selection/detection circuit |
| CN101697462A (en) * | 2009-10-30 | 2010-04-21 | 河北省激光研究所 | Dynamic interconnected control system and control method for solar battery pack |
| CN102116792A (en) * | 2009-12-31 | 2011-07-06 | 国民技术股份有限公司 | System and method for testing chip voltage signal |
| JP2011179861A (en) * | 2010-02-26 | 2011-09-15 | Renesas Electronics Corp | Voltage detector circuit |
| CN108008322A (en) * | 2017-10-27 | 2018-05-08 | 珠海格力节能环保制冷技术研究中心有限公司 | The detection method and circuit of multiple power supplies |
| EP3716011A1 (en) * | 2019-03-25 | 2020-09-30 | EM Microelectronic-Marin SA | Power management integrated circuit |
-
2021
- 2021-06-01 CN CN202110608205.8A patent/CN113359056A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6118295A (en) * | 1997-04-16 | 2000-09-12 | Nec Corporation | Power supply voltage detection device |
| KR20070047718A (en) * | 2005-11-02 | 2007-05-07 | 가부시끼가이샤 도시바 | Power supply circuit |
| CN101025654A (en) * | 2006-02-24 | 2007-08-29 | 恩益禧电子股份有限公司 | Power supply selection/detection circuit |
| CN101697462A (en) * | 2009-10-30 | 2010-04-21 | 河北省激光研究所 | Dynamic interconnected control system and control method for solar battery pack |
| CN102116792A (en) * | 2009-12-31 | 2011-07-06 | 国民技术股份有限公司 | System and method for testing chip voltage signal |
| JP2011179861A (en) * | 2010-02-26 | 2011-09-15 | Renesas Electronics Corp | Voltage detector circuit |
| CN108008322A (en) * | 2017-10-27 | 2018-05-08 | 珠海格力节能环保制冷技术研究中心有限公司 | The detection method and circuit of multiple power supplies |
| EP3716011A1 (en) * | 2019-03-25 | 2020-09-30 | EM Microelectronic-Marin SA | Power management integrated circuit |
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Application publication date: 20210907 |