CN214473651U - Automatic testing and calibrating system for RMS power supply switching module - Google Patents
Automatic testing and calibrating system for RMS power supply switching module Download PDFInfo
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- CN214473651U CN214473651U CN202023232213.7U CN202023232213U CN214473651U CN 214473651 U CN214473651 U CN 214473651U CN 202023232213 U CN202023232213 U CN 202023232213U CN 214473651 U CN214473651 U CN 214473651U
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Abstract
The utility model provides a RMS power switching module automatic test and calibration system, including three high accuracy alternating current power supply and two voltage output wiring ends, can set up the gating switch circuit by microprocessor control between wiring end and three alternating current power supply, through the different voltage output of gating, the realization is to the alternating voltage supply of the different combinations of two AC inputs of RMS power switching module, can come the output that the theory should obtain of logic judgement according to the voltage level of gating input, compare according to RMS power switching module actual output voltage's readout value simultaneously, carry out the logic test. Two paths of AC input voltages displayed on a display screen of the RMS power supply switching module are transmitted to a computer system, are compared with a loading voltage output by actual gating, and are compensated and corrected according to the difference value of the comparison result, so that the error difference caused by the system error of components of the RMS power supply switching module is eliminated.
Description
Technical Field
The utility model belongs to the technical field of the relay technique and specifically relates to RMS power switching module, concretely relates to RMS power switching module automatic test and calibration system.
Background
The RMS power switching module is a double-alternating-current power switching module realized based on a relay, namely, the RMS power switching module is provided with two alternating-current inputs (AC1 and AC2) for supplying power, and one alternating-current output is AC-OUT. After the first AC input AC1 loses power or the voltage fluctuation is abnormal (for example, more than +/-20 percent), the second AC input AC2 is automatically switched. However, if the first path is powered back and the voltage fluctuation of the first path within a certain time period is monitored to be within an allowable range (for example, less than +/-20%), the first path is switched to be powered back, and the first path is not automatically switched without losing power. The RMS power supply switching module can monitor the electrical quality of two paths of input in real time, has overvoltage, undervoltage and voltage loss protection, can realize the accurate switching of two paths of voltage, and has priority to the first path of input (AC 1).
The RMS power switching module is also usually provided with a display module on the casing thereof, which displays the voltage values of the AC1 and AC2, and may cause the displayed voltage values to be inconsistent with the actual input voltage values due to system errors or other reasons.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a RMS power switches module automatic test and calibration system can realize getting the automatic test to RMS power switches module.
According to the utility model discloses an improvement provides a RMS power switching module automatic test and calibration system, include:
a first AC power supply providing an AC output of a first voltage value;
a second AC power supply providing an AC output of a second voltage value;
a third AC power supply providing an AC output of a third voltage value;
the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all connected to the input end of the first gating circuit, and the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are connected to the first alternating current input end of the RMS power supply switching module to be tested through a first wiring terminal;
the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are connected to the input end of the second gating circuit, and the output ends of the second gating circuit are connected to the second alternating current input end of the RMS power supply switching module to be tested through a second wiring terminal;
the microprocessor is connected with the first gating circuit and the second gating circuit and used for controlling the output voltage of the first gating circuit and the output voltage of the second gating circuit and recording the output voltage of each wiring terminal;
the communication module is connected with the microprocessor, is provided with a communication interface, is in data communication with the communication module of the RMS power switching module to be tested, and receives the alternating current output voltage of the RMS power switching module and a first path of input voltage value and a second path of input voltage value which are displayed on a display screen of the RMS power switching module;
and the computer system is connected with the microprocessor through the communication interface, receives the output voltage of each wiring terminal recorded by the microprocessor, the alternating current output voltage of the RMS power supply switching module, the first path of input voltage value and the second path of input voltage value displayed on a display screen of the RMS power supply switching module, obtains a test result through the logic judgment of the alternating current output voltage and the output voltage of the wiring terminals, and controls the calibration of the RMS power supply switching module to be tested through the comparison of the output voltage of the wiring terminals and the first path of input voltage value and the second path of input voltage value displayed on the display screen.
Preferably, the first alternating current power supply, the second alternating current power supply and the third alternating current power supply all adopt high-precision power supply voltage regulator modules. The first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all TDGC type voltage regulators, the input voltage is 220VAC, and the output voltage range is 0-250 VAC.
Preferably, the output voltages of the first ac power supply, the second ac power supply, and the third ac power supply satisfy:
the first voltage value V1 is smaller than the minimum value Vmin of the alternating current input voltage fluctuation value of the RMS power supply switching module;
the second voltage value V2 is equal to the rated input value Vd of the two paths of alternating voltages of the RMS power supply switching module;
the third voltage value V3 is greater than the maximum value Vmax of the RMS power supply switching module to ac input voltage fluctuation values.
Preferably, the microprocessor is configured to control two output voltages to load a first ac input terminal and a second ac input terminal corresponding to the RMS power switching module to be tested, respectively, in different logic combinations.
Preferably, the first gating circuit and the second gating circuit adopt the same gating circuit based on 74 series multi-channel gating control ICs or CD4000 series multi-channel gating control ICs.
Preferably, the computer system controls to perform calibration compensation on the RMS power switching module to be tested according to a comparison result between the output voltage Vout of the connection terminal and the first input voltage Vo1 and the second input voltage Vo2 displayed on the display screen:
if Vout is greater than Vo1 or Vout is greater than Vo2, the microprocessor in the RMS power switching module is controlled to send a compensation command and a compensation value, wherein the compensation value is a voltage difference value of a corresponding channel, that is, a difference value between Vout and Vo1 or a difference value between Vout and Vo 2.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of an RMS power switching module automatic test and calibration system according to an embodiment of the present invention.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
The automatic testing and calibration system for the RMS power supply switching module in the exemplary embodiment of fig. 1 includes three high-precision alternating-current power supplies and two voltage input terminals for supplying input voltage to the RMS power supply switching module, a gating switch circuit controlled by a microprocessor (a microcontroller, a single-chip microcomputer, etc.) can be arranged between the terminals and the three alternating-current power supplies, and alternating-current voltage supply of different combinations of two AC inputs of the RMS power supply switching module is realized by gating different voltage outputs.
Meanwhile, two paths of AC input voltages displayed on a display screen of the RMS power supply switching module are transmitted to a test system and a tested computer through a communication link, such as 485 bus communication, and are compared with the loading voltage output by actual gating, and the RMS power supply switching module is compensated and corrected according to the difference of the comparison result, so that the error difference caused by the system error of components of the RMS power supply switching module is eliminated.
Referring to fig. 1, the three ac power supplies are a first ac power supply, a second ac power supply, and a third ac power supply, respectively.
A first AC power supply provides an AC output of a first voltage value V1.
And a second AC power supply providing an AC output of a second voltage value V2.
And a third AC power supply providing an AC output of a third voltage value V3.
And the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all connected to the input end of the first gating circuit, and the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are connected to the first alternating current input end of the RMS power supply switching module to be tested through the first wiring terminal.
And the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all connected to the input end of the second gating circuit, and the output ends of the second gating circuit are connected to the second alternating current input end of the RMS power supply switching module to be tested through a second wiring terminal.
A microprocessor, for example using an STM32 based processor, is connected to the first and second gating circuits for controlling the output voltages of the first and second gating circuits and recording the output voltage of each terminal.
And the communication module is connected with the microprocessor and is provided with a communication interface, is in data communication with the communication module of the RMS power switching module to be tested, and receives the alternating current output voltage of the RMS power switching module and the first path of input voltage value and the second path of input voltage value displayed on a display screen of the RMS power switching module.
And the computer system is connected with the microprocessor through the communication interface, receives the output voltage of each wiring terminal recorded by the microprocessor, the alternating current output voltage of the RMS power switching module, the first path of input voltage value and the second path of input voltage value displayed on a display screen of the RMS power switching module, obtains a test result through the logic judgment of the alternating current output voltage and the output voltage of the wiring terminals, and controls the calibration of the RMS power switching module to be tested through the comparison of the output voltage of the wiring terminals and the first path of input voltage value and the second path of input voltage value displayed on the display screen.
Preferably, the first alternating current power supply, the second alternating current power supply and the third alternating current power supply all adopt high-precision power supply voltage regulator modules. The first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all TDGC type voltage regulators, for example, a high-precision single-phase voltage regulator of Deleisi or Thai company is selected, the input voltage is 220VAC, and the output voltage range is 0-250 VAC.
Preferably, the output voltages of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply satisfy:
the first voltage value V1 is smaller than the minimum value Vmin of the alternating current input voltage fluctuation value of the RMS power supply switching module;
the second voltage value V2 is equal to the rated input value Vd of the two paths of alternating voltages of the RMS power supply switching module;
the third voltage value V3 is greater than the maximum value Vmax of the RMS power supply switching module to ac input voltage fluctuation values.
For example, taking the two AC inputs AC1 and AC2 as 220VAC as an example, if the allowable voltage fluctuation range is set to be plus or minus 20%, the actual allowable voltage fluctuation range is 176VDAC-264VAC, Vmin is 176V, and Vmax is 264V, then in the embodiment of the present invention, the first voltage value V1 should be smaller than 176V, for example, 170V is set. The second voltage value V2 is 220V, and the third voltage value V3 should be greater than 264V, for example, set at 270V.
Thus, for example, if the input to AC1 is 170V and the input to AC2 is 220V, the AC-OUT output should theoretically be 220V, and if the actual monitored sensed output voltage is 220V, the logic under test is normal. By analogy, other combinations of voltage inputs are selected for AC1 and AC2, and other logic tests are performed.
Preferably, the microprocessor is configured to control the two output voltages to be loaded on the first ac input terminal and the second ac input terminal corresponding to the RMS power switching module to be tested respectively in different logic combinations, that is, the first terminal is respectively provided with V1, V2 and V3, and correspondingly, the second terminal is also respectively provided with the logic combinations of V1, V2 and V3 to perform comprehensive logic tests.
Preferably, the first gating circuit and the second gating circuit adopt the same gating circuit based on 74 series multi-channel gating control ICs or CD4000 series multi-channel gating control ICs.
Preferably, the computer system controls the calibration compensation of the RMS power switching module to be tested according to the comparison result between the output voltage Vout of the connection terminal and the first input voltage Vo1 and the second input voltage Vo2 displayed on the display screen:
if Vout is greater than Vo1 or Vout is greater than Vo2, the microprocessor in the RMS power switching module is controlled to send a compensation instruction and a compensation value, wherein the compensation value is a voltage difference value of a corresponding channel, namely a difference value between Vout and Vo1 or a difference value between Vout and Vo2, and the difference value is written into the RMS power switching module through the microprocessor, so that system compensation is realized.
Meanwhile, the testing process of each RMS power supply switching module is recorded and numbered, so that the quality and the product can be traced in the later period, and the quality management is enhanced.
In combination with the embodiments of the above aspects, the utility model discloses a RMS power switching module test system's is showing the advantage and lies in:
the utility model provides a RMS power switching module automatic test and calibration system, get input power according to a plurality of high precisions and get the RMS power switching module that the logical combination input awaited measuring, get the design rule according to RMS power switching module, whether the analysis gets the theoretical output that test voltage loaded to RMS power switching module according to control output and the RMS power switching module actual output and agrees with the result, if accord with then judge qualified, if not conform to, then judge unqualifiedly, test process automation degree is high, and the test result can truly reflect the actual quality of RMS power switching module, avoid because reasons such as insufficient solder in the assembly process or because the quality degradation that the systematic error of RMS power switching module inside components and parts caused.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (7)
1. An RMS power switching module automatic test and calibration system, comprising:
a first AC power supply providing an AC output of a first voltage value;
a second AC power supply providing an AC output of a second voltage value;
a third AC power supply providing an AC output of a third voltage value;
the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are all connected to the input end of the first gating circuit, and the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are connected to the first alternating current input end of the RMS power supply switching module to be tested through a first wiring terminal;
the output ends of the first alternating current power supply, the second alternating current power supply and the third alternating current power supply are connected to the input end of the second gating circuit, and the output ends of the second gating circuit are connected to the second alternating current input end of the RMS power supply switching module to be tested through a second wiring terminal;
the microprocessor is connected with the first gating circuit and the second gating circuit and used for controlling the output voltage of the first gating circuit and the output voltage of the second gating circuit and recording the output voltage of each wiring terminal;
the communication module is connected with the microprocessor, is provided with a communication interface, is in data communication with the communication module of the RMS power switching module to be tested, and receives the alternating current output voltage of the RMS power switching module and a first path of input voltage value and a second path of input voltage value which are displayed on a display screen of the RMS power switching module;
and the computer system is connected with the microprocessor through the communication interface, receives the output voltage of each wiring terminal recorded by the microprocessor, the alternating current output voltage of the RMS power supply switching module, the first path of input voltage value and the second path of input voltage value displayed on a display screen of the RMS power supply switching module, obtains a test result through the logic judgment of the alternating current output voltage and the output voltage of the wiring terminals, and controls the calibration of the RMS power supply switching module to be tested through the comparison of the output voltage of the wiring terminals and the first path of input voltage value and the second path of input voltage value displayed on the display screen.
2. The RMS power switching module automatic test and calibration system of claim 1, wherein said first, second and third ac power supplies each employ a high precision power supply regulator module.
3. The RMS power switching module automatic test and calibration system as claimed in claim 1, wherein said first, second and third AC power supplies each employ a TDGC type voltage regulator, the input voltage is 220VAC and the output voltage range is 0-250 VAC.
4. The RMS power switching module automatic test and calibration system according to claim 1, wherein the output voltages of said first, second and third ac power sources are such that:
the first voltage value V1 is smaller than the minimum value Vmin of the alternating current input voltage fluctuation value of the RMS power supply switching module;
the second voltage value V2 is equal to the rated input value Vd of the two paths of alternating voltages of the RMS power supply switching module;
the third voltage value V3 is greater than the maximum value Vmax of the RMS power supply switching module to ac input voltage fluctuation values.
5. The RMS power switching module automatic testing and calibration system according to claim 1, wherein said microprocessor is configured to control two output voltages with different logic combinations to load the first ac input terminal and the second ac input terminal corresponding to the RMS power switching module to be tested, respectively.
6. The RMS power-switching module automatic test and calibration system according to claim 1, wherein said first gating circuit, second gating circuit use the same gating circuit based on 74 series multi-channel gating control IC or CD4000 series multi-channel gating control IC.
7. The RMS power switching module automatic test and calibration system as claimed in claim 1, wherein said computer system controls calibration compensation to the RMS power switching module to be tested according to the comparison of the output voltage Vout of the connection terminal with the first input voltage Vo1 and the second input voltage Vo2 displayed on the display screen:
if Vout is greater than Vo1 or Vout is greater than Vo2, the microprocessor inside the RMS power switching module is controlled to send a compensation command and a compensation value, wherein the compensation value is a voltage difference value of a corresponding channel, namely a difference value between Vout and Vo1 or a difference value between Vout and Vo 2.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114895231A (en) * | 2022-07-12 | 2022-08-12 | 南京宏泰半导体科技有限公司 | High-end voltage differential sampling calibration system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114895231A (en) * | 2022-07-12 | 2022-08-12 | 南京宏泰半导体科技有限公司 | High-end voltage differential sampling calibration system and method |
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