CN215340100U - Capacitor monitoring circuit, capacitor monitoring device and bent monitoring equipment - Google Patents
Capacitor monitoring circuit, capacitor monitoring device and bent monitoring equipment Download PDFInfo
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- CN215340100U CN215340100U CN202120769877.2U CN202120769877U CN215340100U CN 215340100 U CN215340100 U CN 215340100U CN 202120769877 U CN202120769877 U CN 202120769877U CN 215340100 U CN215340100 U CN 215340100U
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Abstract
The utility model belongs to the technical field of the test, a electric capacity monitoring circuit, electric capacity monitoring device and framed bent supervisory equipment is provided, electric capacity monitoring circuit includes a plurality of sampling module, control module and communication module, a plurality of sampling module respectively with a plurality of by survey the electric capacity one-to-one connection, be used for gathering a plurality of by the electric capacity voltage at survey electric capacity both ends, generate a plurality of electric capacity voltage signal, control module and a plurality of sampling module connects, is used for receiving a plurality of electric capacity voltage signal generates a plurality of electric capacity voltage data signal, and communication module forwards electric capacity voltage data signal to the host computer to solve the problem that current monitoring technology can't realize the overall process control.
Description
Technical Field
The application belongs to the technical field of testing, especially relates to a capacitance monitoring circuit, capacitance monitoring device and bent supervisory equipment.
Background
The capacitor is an important element in the circuit, for example, the inverter plays a role of maintaining voltage across the modules, and once the capacitor fails, the state of each submodule is different, and the performance of the inverter is affected. For a capacitor, under the conditions of over-current and over-voltage due to over-high temperature and humidity, aging gradually occurs, so that the capacitance value of the capacitor is reduced, the equivalent series resistance value of the capacitor is increased, and the aging is a process with slowly changing parameters, unlike open-circuit and short-circuit faults, does not bring instantaneous parameter mutation to a system, and has no obvious influence on voltage and current waveforms, so that a fault diagnosis method for short-circuit and open-circuit of an electric appliance is not suitable for capacitor aging.
The existing monitoring technology cannot realize whole-process monitoring, can only be applied to single test of products, and cannot meet the product requirements.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an embodiment of the present application provides a capacitor monitoring circuit, a capacitor monitoring device and a bent monitoring apparatus, which can solve the problem that the existing monitoring technology cannot realize the whole process monitoring.
This application first aspect provides a capacitance monitoring circuit, with being connected by measured capacitance, capacitance monitoring circuit includes:
the sampling modules are respectively connected with the tested capacitors in a one-to-one correspondence manner and used for acquiring capacitor voltages at two ends of the tested capacitors to generate a plurality of capacitor voltage signals;
the control module is connected with the plurality of sampling modules and used for receiving the plurality of capacitance voltage signals and generating a plurality of capacitance voltage data signals;
and the communication module is connected with the control module and used for forwarding the capacitance voltage data signal to an upper computer.
In one embodiment, the capacitance monitoring circuit includes:
and the storage module is connected with the control module and used for writing a plurality of capacitor voltage data signals.
In one embodiment, the capacitance monitoring circuit includes:
and the power supply module is respectively connected with the control module, the communication module and the plurality of sampling modules and used for supplying power to the control module, the communication module and the plurality of sampling modules.
In one embodiment, the sampling module comprises:
the voltage sampling unit is connected with the tested capacitor and used for sampling the tested capacitor to generate a voltage sampling signal;
the signal amplification unit is connected with the voltage sampling unit and is used for amplifying the voltage sampling signal;
and the filtering unit is connected with the signal amplifying unit and used for filtering the amplified signal to generate a capacitance voltage signal.
In one embodiment, the sampling module further comprises:
and the overvoltage protection unit is connected with the signal amplification unit and is used for performing overvoltage protection on the capacitor voltage signal.
In one embodiment, the voltage sampling unit includes: the circuit comprises a first resistor, a first diode and a second diode; the first end of the first resistor is connected with the first end of the capacitor to be detected, the second end of the first resistor is connected with the anode of the first diode, and the cathode of the first diode, the anode of the second diode and the second end of the capacitor to be detected are connected to a power supply end in common.
In one embodiment, the signal amplifying unit includes: an operational amplifier, a second resistor and a third resistor; the positive phase input end of the operational amplifier is connected with the power supply end, the negative phase input end of the operational amplifier and the first end of the second resistor are connected to the voltage sampling unit in a shared mode, the output end of the operational amplifier and the second end of the second resistor are connected to the first end of the third resistor in a shared mode, and the second end of the third resistor is connected with the filtering unit.
In one embodiment, the filtering unit includes at least one filtering capacitor, a first end of the at least one filtering capacitor is connected to the signal amplifying unit, and a second end of the at least one filtering capacitor is grounded.
The second aspect of the present application also provides a capacitance monitoring device comprising a capacitance monitoring circuit as described in any one of the above.
The third aspect of the present application also provides a bent frame monitoring apparatus, including: a plurality of capacitors to be tested, and a capacitance monitoring circuit as claimed in any one of the preceding claims, connected to a plurality of said capacitors to be tested
The embodiment of the application provides a capacitance monitoring circuit, capacitance monitoring device and bent supervisory equipment, and capacitance monitoring circuit includes a plurality of sampling module, control module and communication module, and a plurality of sampling module respectively with a plurality of measured capacitance one-to-one is connected for gather a plurality ofly the capacitance voltage at measured capacitance both ends generates a plurality of capacitance voltage signal, and control module and a plurality of sampling module connects for it is a plurality of to receive capacitance voltage signal generates a plurality of capacitance voltage data signal, and communication module forwards capacitance voltage data signal to the host computer to solve the problem that current monitoring technology can't realize the overall process control.
Drawings
Fig. 1 is a schematic structural diagram of a capacitance monitoring circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a capacitance monitoring circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a capacitance monitoring circuit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a sampling module according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The embodiment of the application provides a capacitance monitoring circuit, refer to fig. 1 and show, capacitance monitoring circuit is connected with measured capacitor 10, capacitance monitoring circuit includes a plurality of sampling module 20, control module 30 and communication module 40, a plurality of sampling module 20 are connected with a plurality of measured capacitor 10 one-to-one respectively, a plurality of sampling module 20 are used for gathering the capacitance voltage at a plurality of measured capacitor 10 both ends, generate a plurality of capacitance voltage signals, control module 30 is connected with a plurality of sampling module 20, be used for receiving a plurality of capacitance voltage signals, and generate a plurality of capacitance voltage data signals, communication module 40 forwards capacitance voltage data signal to the host computer, thereby solve the problem that current monitoring technology can't realize the overall process control.
In the present embodiment, the sampling modules 20 are connected to the tested capacitors 10 in a one-to-one correspondence, for example, the number of the sampling modules 20 is 21 or 30.
In a specific application embodiment, the 21-way or 30-way sampling module 20 independently samples each capacitor on the shelving monitoring, collects voltages at two ends of the capacitors in real time, and transmits the collected data to the control module 30 in real time.
In one embodiment, referring to fig. 2, the capacitance monitoring circuit in this embodiment further includes a storage module 50, and the storage module 50 is connected to the control module 30 for writing a plurality of capacitance voltage data signals.
In this embodiment, the control module 30 converts the received capacitance voltage signal into a capacitance voltage data signal, and transmits the capacitance voltage data signal to the storage module 50 in real time, at this time, the data is sequentially written into the storage module 50. For example, the control module 30 converts the voltage value of the capacitor voltage signal into a corresponding capacitor voltage data signal, wherein the capacitor voltage signal is an analog signal, and the capacitor voltage data signal is a digital signal, which may be a pulse signal, and then writes the digital signal into the storage module 50.
In the process of data transmission, the control module reads data from the storage module 50 and performs data transmission with the upper computer through the communication module 40, so that the acquired data is transmitted to the upper computer for capacitor voltage analysis, and parameters of the capacitor 10 to be detected are monitored in real time.
In one embodiment, the memory module 50 may be a register.
In one embodiment, the register may be a 21-bit register or a 30-bit register.
In one embodiment, referring to fig. 3, the capacitance monitoring circuit further includes a power module 60, and the power module 60 is connected to the control module 30, the communication module 40, and the sampling modules 20, respectively, for supplying power to the control module 30, the communication module 40, and the sampling modules 20.
In this embodiment, the power supply module 60 may generate a plurality of power supply voltages to respectively supply power to a plurality of functional modules in the circuit.
Specifically, in one embodiment, the power module 60 may be composed of a power management chip and its peripheral circuits.
In one embodiment, referring to fig. 4, the sampling module 20 includes: the device comprises a voltage sampling unit 21, a signal amplifying unit 22 and a filtering unit 23, wherein the voltage sampling unit 21 is connected with the capacitor to be tested 10, and the voltage sampling unit 21 is used for sampling the capacitor to be tested 10 to generate a voltage sampling signal; the signal amplifying unit 22 is connected with the voltage sampling unit 21 and is used for amplifying the voltage sampling signal; the filtering unit 23 is connected to the signal amplifying unit 22, and is configured to perform filtering processing on the amplified signal to generate a capacitance voltage signal.
In this embodiment, the voltage sampling unit 21 is connected in parallel with the measured capacitor 10, and is configured to collect voltages at two ends of the measured capacitor 10, and send a voltage sampling signal to the signal amplifying unit 22 for signal amplification processing, and the filtering unit 23 performs filtering processing on the signal after signal amplification processing.
In one embodiment, the capacitor under test 10 may include at least one capacitor under test.
Referring to fig. 4, the measured capacitor 10 includes a capacitor C0 to be measured, and the sampling module 20 is connected in parallel with the capacitor C0 to be measured.
In one embodiment, referring to fig. 4, the sampling module 20 further includes an overvoltage protection unit 24, and the overvoltage protection unit 24 is connected to the signal amplification unit 22 for performing overvoltage protection on the capacitor voltage signal.
In this embodiment, the overvoltage protection unit 24 may be composed of at least one overvoltage protection device.
In one embodiment, the overvoltage protection unit 24 may be a voltage regulator tube, and is configured to perform voltage regulation on the capacitor voltage signal to avoid an overvoltage condition on the capacitor voltage signal.
In one embodiment, referring to fig. 4, the structure of the overvoltage protection unit 24 may be a protection device T2, and the protection device T2 may be composed of two diodes, specifically, two diodes are connected in series, and the cathode of the first diode and the anode of the second diode are commonly connected to the output terminal ADC of the signal amplification unit 22, the anode of the first diode is connected to the floating ground GND, and the cathode of the second diode is connected to the second power supply terminal V1.
In one embodiment, referring to fig. 4, the voltage sampling unit 21 includes: a first resistor R1, a first diode D1, a second diode D2; the first end of the first resistor R1 is connected with the first end of the capacitor 10 to be tested, the second end of the first resistor R1 is connected with the anode of the first diode D1, and the cathode of the first diode D1, the anode of the second diode D2 and the second end of the capacitor 10 to be tested are commonly connected to the power supply terminal VCC.
In this embodiment, the first diode D1 and the second diode D2 form a protection device T1, the cathode of the first diode D1 and the anode of the second diode D2 are both connected to the floating ground GND, and the floating ground GND is connected to the power supply terminal VCC of the charging power supply, so that the reverse reduction is performed in the floating system.
In one embodiment, referring to fig. 4, the signal amplifying unit 22 includes: an operational amplifier U1, a second resistor R2, and a third resistor R3; the non-inverting input terminal of the operational amplifier U1 is connected to the power supply terminal, the inverting input terminal of the operational amplifier U1 and the first terminal of the second resistor R2 are commonly connected to the voltage sampling unit 21, the output terminal of the operational amplifier U1 and the second terminal of the second resistor R2 are commonly connected to the first terminal of the third resistor R3, and the second terminal of the third resistor R3 is connected to the filtering unit 23.
In the present embodiment, the operational amplifier U1, the second resistor R2 and the third resistor R3 form a signal amplifying circuit, and the second resistor R2 forms a feedback circuit.
In one embodiment, the filtering unit 23 includes at least one filtering capacitor, a first terminal of the at least one filtering capacitor is connected to the signal amplifying unit 22, and a second terminal of the at least one filtering capacitor is grounded.
In this embodiment, the filtering unit 23 may include a plurality of filtering capacitors, and the plurality of filtering capacitors are connected in parallel or in series.
In one embodiment, the plurality of filter capacitors may be further configured by connecting a plurality of filter capacitors in parallel and then connecting them in series, or connecting a plurality of filter capacitors in series and then connecting them in parallel.
In one embodiment, referring to fig. 4, the filtering unit 23 includes a first capacitor C1, a first terminal of the first capacitor C1 is connected to the signal amplifying unit 22, and a second terminal of the first capacitor C1 is grounded.
An embodiment of the present application further provides a capacitance monitoring device, which includes the capacitance monitoring circuit as described in any one of the above.
The embodiment of the present application further provides a bent frame monitoring device, and the bent frame monitoring device includes: a plurality of measured capacitors 10, and a capacitance monitoring circuit as in any of the above embodiments, the capacitance monitoring circuit being connected to the plurality of measured capacitors 10.
In this embodiment, the capacitor monitoring circuit is applied to the monitoring of capacitor aging process, carries out data acquisition to the operation process of whole circuit, judges the stability of product through data acquisition, can effectively guarantee product quality, reduces the defective rate.
The embodiment of the application provides a capacitance monitoring circuit, capacitance monitoring device and bent frame supervisory equipment, a capacitance monitoring circuit, capacitance monitoring device and bent frame supervisory equipment is provided, capacitance monitoring circuit includes a plurality of sampling module 20, control module 30 and communication module 40, a plurality of sampling module 20 are connected with a plurality of measured capacitors 10 one-to-one respectively, a plurality of capacitor voltage who is surveyed the capacitor 10 both ends is used for gathering, generate a plurality of capacitor voltage signals, control module 30 is connected with a plurality of sampling module 20, a plurality of capacitor voltage signals are used for receiving, and generate a plurality of capacitor voltage data signal, communication module 40 forwards capacitor voltage data signal to the host computer, thereby solve the problem that current monitoring technique can't realize the overall process control.
The implementation of this technical patent is very succinct convenient. In the prior power supply circuit, only single-stage filtering processing is carried out. As explained in the above analysis, only a single stage of filtering of the circuit of the filtering element needs to be replaced by a multi-stage filtering circuit in the monitoring circuit of the first capacitor C1. Meanwhile, as an alternative application, a first capacitor C1 monitoring circuit can be added, and the effect is more remarkable.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A capacitance monitoring circuit connected to a capacitor to be measured, the capacitance monitoring circuit comprising:
the sampling modules are respectively connected with the tested capacitors in a one-to-one correspondence manner and used for acquiring capacitor voltages at two ends of the tested capacitors to generate a plurality of capacitor voltage signals;
the control module is connected with the plurality of sampling modules and used for receiving the plurality of capacitance voltage signals and generating a plurality of capacitance voltage data signals;
and the communication module is connected with the control module and used for forwarding the capacitance voltage data signal to an upper computer.
2. The capacitance monitoring circuit of claim 1, further comprising:
and the storage module is connected with the control module and used for writing a plurality of capacitor voltage data signals.
3. The capacitance monitoring circuit of claim 1, further comprising:
and the power supply module is respectively connected with the control module, the communication module and the plurality of sampling modules and used for supplying power to the control module, the communication module and the plurality of sampling modules.
4. The capacitance monitoring circuit of claim 1, wherein the sampling module comprises:
the voltage sampling unit is connected with the tested capacitor and used for sampling the tested capacitor to generate a voltage sampling signal;
the signal amplification unit is connected with the voltage sampling unit and is used for amplifying the voltage sampling signal;
and the filtering unit is connected with the signal amplifying unit and used for filtering the amplified signal to generate a capacitance voltage signal.
5. The capacitance monitoring circuit of claim 4, wherein the sampling module further comprises:
and the overvoltage protection unit is connected with the signal amplification unit and is used for performing overvoltage protection on the capacitor voltage signal.
6. The capacitance monitoring circuit of claim 4, wherein the voltage sampling unit comprises: the circuit comprises a first resistor, a first diode and a second diode; the first end of the first resistor is connected with the first end of the capacitor to be detected, the second end of the first resistor is connected with the anode of the first diode, and the cathode of the first diode, the anode of the second diode and the second end of the capacitor to be detected are connected to a power supply end in common.
7. The capacitance monitoring circuit of claim 4, wherein the signal amplification unit comprises: an operational amplifier, a second resistor and a third resistor; the positive phase input end of the operational amplifier is connected with the power supply end, the negative phase input end of the operational amplifier and the first end of the second resistor are connected to the voltage sampling unit in a shared mode, the output end of the operational amplifier and the second end of the second resistor are connected to the first end of the third resistor in a shared mode, and the second end of the third resistor is connected with the filtering unit.
8. The capacitance monitoring circuit of claim 4, wherein the filtering unit comprises at least one filtering capacitor, a first terminal of the at least one filtering capacitor is connected to the signal amplification unit, and a second terminal of the at least one filtering capacitor is grounded.
9. A capacitance monitoring device, comprising a capacitance monitoring circuit according to any one of claims 1-8.
10. A bent monitoring device, comprising: a plurality of capacitors to be tested, and a capacitance monitoring circuit as claimed in any one of claims 1 to 8, connected to a plurality of said capacitors to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120769877.2U CN215340100U (en) | 2021-04-14 | 2021-04-14 | Capacitor monitoring circuit, capacitor monitoring device and bent monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120769877.2U CN215340100U (en) | 2021-04-14 | 2021-04-14 | Capacitor monitoring circuit, capacitor monitoring device and bent monitoring equipment |
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| Publication Number | Publication Date |
|---|---|
| CN215340100U true CN215340100U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120769877.2U Active CN215340100U (en) | 2021-04-14 | 2021-04-14 | Capacitor monitoring circuit, capacitor monitoring device and bent monitoring equipment |
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| CN (1) | CN215340100U (en) |
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- 2021-04-14 CN CN202120769877.2U patent/CN215340100U/en active Active
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