CN111337858A - Capacitance detection device and system - Google Patents
Capacitance detection device and system Download PDFInfo
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- CN111337858A CN111337858A CN202010193228.2A CN202010193228A CN111337858A CN 111337858 A CN111337858 A CN 111337858A CN 202010193228 A CN202010193228 A CN 202010193228A CN 111337858 A CN111337858 A CN 111337858A
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Abstract
The invention discloses a capacitance detection device and a system, wherein the device comprises a capacitance module to be detected, a capacitance state indicating module and a temperature control module; the capacitor module to be tested comprises a first resistor and N pairs of wiring terminals, wherein N is more than or equal to 1; the first end of the first resistor is used for connecting a first power supply, one connecting terminal of each pair of connecting terminals is connected with the second end of the first resistor, and the other connecting terminal of each pair of connecting terminals is grounded; each pair of the wiring terminals is used for connecting a capacitor to be tested; the first end of the capacitance state indicating module is connected with the first end of the first resistor, and the second end of the capacitance state indicating module is connected with the second end of the first resistor; the temperature control module is used for being in heat conduction contact with the capacitor module to be tested so as to control the working temperature of the capacitor to be tested. The invention can improve the capacitance detection efficiency.
Description
Technical Field
The invention relates to the technical field of capacitance detection, in particular to a capacitance detection device and system.
Background
Before the electronic component is installed in the electronic product, the electronic component is subjected to corresponding detection. After the electronic element is determined to be normally used, the electronic element can be applied to the production and marketing of electronic products, and the electronic products are prevented from being incapable of normally working due to the failure of the electronic element. For example, in practical use, capacitors, especially ceramic capacitors, are susceptible to use conditions, have high failure rate, and are prone to show short circuit after failure. If the failed capacitor is applied to an active network, a power supply short circuit is easily caused, so that the whole electronic product fails. Therefore, it is necessary to detect the capacitance.
In the prior art, a capacitor is used as an independent element, and is usually placed in an electronic product complete machine for detection so as to provide a power-on environment for the capacitor, and whether the capacitor can be normally used is reflected through functions of the electronic product.
However, when the capacitor is detected in the prior art, a complete electronic product for detecting the capacitor needs to be produced and produced specially, and the function of the electronic product needs to be analyzed, so that the detection efficiency is low.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a capacitance detection device and system, which can improve the capacitance detection efficiency.
In a first aspect, an embodiment of the present invention provides a capacitance detection apparatus, where the apparatus includes a to-be-detected capacitance module, a capacitance state indication module, and a temperature control module; wherein the content of the first and second substances,
the capacitor module to be tested comprises a first resistor and N pairs of wiring terminals, wherein N is more than or equal to 1; the first end of the first resistor is used for connecting a first power supply, one connecting terminal of each pair of connecting terminals is connected with the second end of the first resistor, and the other connecting terminal of each pair of connecting terminals is grounded; each pair of the wiring terminals is used for connecting a capacitor to be tested;
the first end of the capacitance state indicating module is connected with the first end of the first resistor, and the second end of the capacitance state indicating module is connected with the second end of the first resistor;
the temperature control module is used for being in heat conduction contact with the capacitor module to be tested so as to control the working temperature of the capacitor to be tested.
Further, the capacitance state indicating module comprises a second resistor and an indicating element; wherein the content of the first and second substances,
the first end of the second resistor is the first end of the capacitance state indicating module, the second end of the second resistor is connected with the first end of the indicating element, and the second end of the indicating element is the second end of the capacitance state indicating module.
Further, the indication element is a buzzer, a positive electrode of the buzzer is a first end of the indication element, and a negative electrode of the buzzer is a second end of the indication element.
Further, the indication element is a light emitting diode, an anode of the light emitting diode is a first end of the indication element, and a cathode of the light emitting diode is a second end of the indication element.
Furthermore, the temperature control module comprises a heating element and M temperature acquisition units, wherein M is more than or equal to 1;
the first end of the heating element is used for being connected with a second power supply, the second end of the heating element is grounded, and the heating element is used for being in heat conduction contact with the capacitor module to be tested;
m the temperature acquisition unit is used for gathering the operating temperature of the electric capacity that awaits measuring, M the output of temperature acquisition unit is used for being connected with temperature data output device.
Further, the heating element is a cement resistor.
Further, the first power source is a first adjustable voltage source, and the second power source is a second adjustable voltage source.
In a second aspect, the present invention further provides a capacitance detection system, where the capacitance detection system includes a first power supply and the capacitance detection apparatus according to any one of the first aspect, and the first power supply is connected to a first end of the first resistor in the capacitance detection apparatus.
Further, the capacitance detection system comprises a second power supply and a temperature data output device; the temperature control module comprises a heating element and M temperature acquisition units, wherein M is more than or equal to 1;
the first end of the heating element is connected with the second power supply, the second end of the heating element is grounded, and the heating element is used for being in heat conduction contact with the capacitor module to be tested;
m the temperature acquisition unit is used for gathering the operating temperature of the electric capacity that awaits measuring, M the output of temperature acquisition unit with temperature data output device connects.
Further, the heating element is a cement resistor.
The capacitor detection device and the capacitor detection system provided by the invention have the advantages that the whole electronic product is not required to be specially produced, whether the capacitor to be detected can be normally used or not is not required to be determined by analyzing the function of the electronic product, whether the capacitor to be detected fails or not can be rapidly indicated by the capacitor state indication module, and the detection efficiency of the capacitor to be detected can be improved. Meanwhile, the working temperature of the capacitor to be detected can be known through the temperature control module, the capacitor to be detected can be detected at a specific temperature, the capacitor to be detected is closer to the state in the actual use environment, and the detection result is more accurate and has higher reference value.
Drawings
Fig. 1 is a schematic structural diagram of a first preferred embodiment of a capacitance detection device provided by the present invention;
FIG. 2 is a schematic diagram of a capacitance detection device according to the present invention;
FIG. 3 is an equivalent diagram of the capacitor under test of FIG. 2 in a short circuit;
FIG. 4 is a schematic structural diagram of a second preferred embodiment of a capacitance detection device provided in the present invention;
FIG. 5 is a schematic structural diagram of a third preferred embodiment of a capacitance detection device provided by the present invention;
FIG. 6 is a schematic view of a connection of the heating element provided by the present invention;
FIG. 7 is a schematic structural diagram of a capacitance detecting device according to a fourth preferred embodiment of the present invention;
fig. 8 is a schematic structural diagram of a capacitance detection system according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a capacitance detection device according to a first preferred embodiment of the present invention; specifically, the device comprises a to-be-tested capacitor module 1, a capacitor state indicating module 2 and a temperature control module 3; wherein the content of the first and second substances,
the capacitor module 1 to be tested comprises a first resistor R1 and N pairs of wiring terminals, wherein N is more than or equal to 1; a first end of the first resistor R1 is used for connecting a first power source VCC1, one of the connection terminals of each pair of the connection terminals is connected with a second end of the first resistor R1, and the other connection terminal of each pair of the connection terminals is grounded; each pair of the wiring terminals is used for connecting a capacitor to be tested;
a first terminal of the capacitance state indicating module 2 is connected to a first terminal of the first resistor R1, and a second terminal of the capacitance state indicating module 2 is connected to a second terminal of the first resistor R1;
the temperature control module 3 is used for being in heat conduction contact with the capacitor module to be tested 1 so as to control the working temperature of the capacitor to be tested.
In specific implementation, the capacitor detection device provided by the invention is used for detecting the capacitors to be detected, and the capacitors to be detected are respectively connected to the butt joint terminals. Carry out heat-conduction through temperature control module to the electric capacity module that awaits measuring, control the operating temperature of the electric capacity that awaits measuring to whether effective the detecting of electric capacity that awaits measuring under specific temperature makes the testing result more press close to the service environment of the electric capacity that awaits measuring. After the working temperature of the capacitor to be detected is controlled, the first power supply can be switched on, and the capacitor to be detected is detected and indicated. The following describes an implementation process of a capacitance detection device provided by the present invention, taking N ═ 1 as an example:
as shown in fig. 2 and fig. 3, if the capacitor C1 to be measured in fig. 2 is in an invalid state (i.e., not normally usable), and the capacitor to be measured is short-circuited, the circuit in fig. 2 is equivalent to the circuit in fig. 3, the branch in which the capacitor state indicating module is located can normally conduct current, and the capacitor state indicating module can normally operate to indicate that the capacitor to be measured is in a short-circuited invalid state. The first resistor R1 has the function of preventing the first power VCC1 from being directly grounded when the capacitor to be tested is short-circuited, thereby damaging the circuit and affecting the detection of the capacitor to be tested.
As shown in fig. 2, if the capacitor to be tested in fig. 2 is in an effective state (i.e., can be used normally), and the capacitor to be tested is open, the branch where the capacitor state indicating module is located cannot conduct current normally, the capacitor state indicating module cannot work normally, and the capacitor state indicating module does not work, which is not different from that before the first power supply is turned on, at this time, the user can determine that the capacitor to be tested is in an effective state and can be used normally.
It should be noted that, when the capacitance state indicating module works normally and does not work, different indicating information can be provided for the capacitor respectively, for example, the capacitance state indicating module may include a light emitting device, and the state of the capacitor to be measured is indicated to a user by whether the light emitting device emits light; for another example, the capacitance state indicating module may include a sounding device, and indicate the state of the capacitor to be measured to the user through whether the sounding device sounds; and may include a display screen or other device that provides instructional information to the user.
It should be noted that, under normal conditions, the failed capacitors to be tested should be small, and most capacitors to be tested are effective capacitors, so that N pairs of wiring terminals are connected in parallel, and one capacitor detection device can simultaneously detect N or less than N capacitors to be tested, for example, N is 12, a user can simultaneously detect 10 capacitors to be tested according to own needs, if 10 capacitors to be tested are normal, the capacitor state indication module does not work, and the user knows that 10 capacitors to be tested are effective; if one or more invalid capacitors exist in the 10 capacitors to be tested, the user checks the current 10 capacitors to be tested one by one, and the invalid capacitors are detected from the 10 capacitors to be tested. Therefore, the detection efficiency of the capacitor to be detected can be further improved, and a user does not need to connect and disconnect the power supply for many times.
The capacitance detection device provided by the invention does not need to specially produce the whole electronic product, does not need to determine whether the capacitor to be detected can be normally used or not by analyzing the function of the electronic product, can quickly indicate whether the capacitor to be detected fails or not by the capacitance state indication module, and can improve the detection efficiency of the capacitor to be detected. Meanwhile, the capacitor detection device provided by the invention can know the working temperature of the capacitor to be detected through the temperature control module, and can detect the capacitor to be detected at a specific temperature, so that the capacitor to be detected is closer to the state in an actual use environment, and the detection result is more accurate and has higher reference value. Compared with a common complete machine electronic product, the capacitance detection device provided by the invention is low in production cost.
Preferably, as shown in fig. 4 and 5, the capacitance state indicating module 2 comprises a second resistor R2 and an indicating element; wherein the content of the first and second substances,
the first end of the second resistor is the first end of the capacitance state indicating module, the second end of the second resistor is connected with the first end of the indicating element, and the second end of the indicating element is the second end of the capacitance state indicating module.
In this embodiment, the capacitance state indicating module includes a second resistor and an indicating element, and can indicate the failure of the capacitor to be detected to a user through a branch where the capacitance state indicating module is located when the capacitor to be detected fails and is short-circuited.
Preferably, as shown in fig. 4, the indication element is a buzzer LS1, a positive pole of the buzzer is a first end of the indication element, and a negative pole of the buzzer is a second end of the indication element.
In this embodiment, whether the capacitor to be tested fails or not is indicated to a user by whether the buzzer makes a sound or not. Specifically, when the capacitor to be tested is failed and short-circuited, the buzzer works normally to make a sound, and a user can know that the capacitor to be tested is failed through the sound prompt of the buzzer. When the capacitor to be tested is effective and can be normally used, the buzzer does not work, and a user can know that the capacitor to be tested is effective by not making a sound through the buzzer.
Preferably, as shown in fig. 5, the indicating element is a light emitting diode D1, an anode of the light emitting diode is a first end of the indicating element, and a cathode of the light emitting diode is a second end of the indicating element.
In this embodiment, whether the capacitor to be tested is failed or not is indicated to a user by whether the light emitting diode emits light or not. Specifically, when the capacitor to be detected is failed and short-circuited, the light-emitting diode works normally to emit light, and a user can know that the capacitor to be detected is failed through light prompt of the light-emitting diode. When the capacitor to be tested is effective and can be normally used, the light-emitting diode does not work, and a user can know that the capacitor to be tested is effective through the fact that the light-emitting diode does not emit light.
Preferably, as shown in FIG. 6 and FIG. 7, the temperature control module 3 includes a heating element 6 and M temperature collection units TC, where M ≧ 1;
the first end of the heating element 6 is used for being connected with a second power supply VCC2, the second end of the heating element 6 is grounded, and the heating element 6 is used for being in heat conduction contact with the capacitance module to be tested 1;
m temperature acquisition unit TC is used for gathering the operating temperature of the electric capacity 4 that awaits measuring, and M the output of temperature acquisition unit TC is used for being connected with temperature data output device.
In this embodiment, the heating element is powered on to heat the capacitor module to be tested, so that the capacitor to be tested is tested in a certain temperature environment; the temperature acquisition unit is used for acquiring the working temperature of the capacitor to be detected, and when the working temperature of the capacitor to be detected is acquired to reach the test temperature, the capacitor to be detected can be detected.
It should be noted that the heat generation state of the heat generating element can be controlled by setting the voltage level of the second power supply. The distance between the heating element and the capacitor to be measured is moderate, so that the working temperature of the capacitor to be measured is not influenced by too far distance, and the local temperature of the capacitor to be measured is not too high by too close distance. The temperature acquisition unit can be a temperature sensor, a temperature probe and other devices capable of acquiring temperature, and the temperature acquisition unit should be as close to the capacitor to be detected as possible so as to provide accurate working temperature of the capacitor to be detected.
Preferably, the heating element is a cement resistor.
In this embodiment, the cement resistor is a pure resistive load, converts electric energy into heat energy, is used for generating heat, and the heat energy conversion rate is high, can promote the operating temperature of the capacitor to be tested to the required test temperature fast. It should be noted that the number of the heating elements may be set according to actual needs.
Preferably, the first power source is a first adjustable voltage source, and the second power source is a second adjustable voltage source.
In this embodiment, first power and second power are adjustable power to the voltage of first power is adjusted according to the relevant parameter of concrete electric capacity that awaits measuring, is convenient for adjust the voltage of second power according to the parameter of concrete cement resistance and the required test temperature of electric capacity that awaits measuring, and then adjusts the operating temperature of electric capacity that awaits measuring.
It should be noted that, as shown in fig. 7, the above-mentioned capacitance detection apparatus may include a substrate 4, for example, a to-be-detected capacitor module is disposed on a first surface of the substrate 5 (fig. 7 illustrates that the to-be-detected capacitor 4 is located on the first surface of the substrate), and the temperature collection unit TC is correspondingly disposed on the first surface of the substrate 5, so as to collect a working temperature of the to-be-detected capacitor 4; a heating element 6, such as a cement resistor, is disposed across the second surface of the substrate 5.
According to the capacitance detection device provided by the invention, the whole electronic product does not need to be specially produced, whether the capacitor to be detected can be normally used or not does not need to be determined by analyzing the function of the electronic product, whether the capacitor to be detected fails or not can be rapidly indicated by the capacitance state indication module, and the detection efficiency of the capacitor to be detected can be improved. Meanwhile, the capacitor detection device provided by the invention can know the working temperature of the capacitor to be detected through the temperature control module, and can detect the capacitor to be detected at a specific temperature, so that the capacitor to be detected is closer to the state in an actual use environment, and the detection result is more accurate and has higher reference value. Compared with a common complete machine electronic product, the capacitance detection device provided by the invention is low in production cost.
Example two
Fig. 8 is referred to, and fig. 8 is a schematic structural diagram of a preferred embodiment of a capacitance detection system according to the present invention; specifically, the capacitance detection system includes a first power supply 7 and the capacitance detection device as described in any one of the above embodiments, where the first power supply 7 is connected to a first end of the first resistor R1 in the capacitance detection device.
The capacitance detection system provided by the invention does not need to specially produce the whole electronic product, does not need to determine whether the capacitor to be detected can be normally used or not by analyzing the function of the electronic product, can quickly indicate whether the capacitor to be detected fails or not through the capacitance state indication module, and can improve the detection efficiency of the capacitor to be detected. Meanwhile, the capacitor detection system provided by the invention can know the working temperature of the capacitor to be detected through the temperature control module, and can detect the capacitor to be detected at a specific temperature, so that the capacitor to be detected is closer to the state in an actual use environment, and the detection result is more accurate and has higher reference value.
It should be noted that, the working principle and the beneficial effect of the capacitance detection system provided by the embodiment of the present invention are similar to those of the capacitance detection device provided by the above embodiment, and thus are not described again.
Preferably, the capacitance detection system comprises a second power supply 8 and a temperature data output device 9; the temperature control module 3 comprises a heating element and M temperature acquisition units, wherein M is more than or equal to 1;
the first end of the heating element is connected with the second power supply, the second end of the heating element is grounded, and the heating element is used for being in heat conduction contact with the capacitor module to be tested;
m the temperature acquisition unit is used for gathering the operating temperature of the electric capacity that awaits measuring, M the output of temperature acquisition unit with temperature data output device 9 is connected.
In the embodiment, the second power supply supplies voltage to the heating element, the heating element generates heat, the heat conduction is carried out on the capacitor module to be tested, and the working temperature of the electric measurement capacitor is controlled; gather the operating temperature of the electric capacity that awaits measuring through the temperature acquisition unit to detect under specific test temperature, the temperature acquisition unit has gathered behind the temperature signal, transmits for temperature data output device, shows the operating temperature of the electric capacity that awaits measuring, for example, temperature probe gathers behind the operating temperature of the resistance that awaits measuring, turns into the signal of telecommunication and exports temperature data output device, analyzes the signal of telecommunication, obtains operating temperature and exports. The temperature data output device can be a single chip microcomputer, a temperature detector and other equipment or instruments.
Preferably, the heating element is a cement resistor.
In this embodiment, the cement resistor is a pure resistive load, converts electric energy into heat energy, is used for generating heat, and the heat energy conversion rate is high, can promote the operating temperature of the capacitor to be tested to the required test temperature fast. It should be noted that the number of the heating elements may be set according to actual needs.
Specifically, the capacitance detection system provided by the invention does not need to specially produce the whole electronic product, does not need to determine whether the capacitor to be detected can be normally used by analyzing the functions of the electronic product, can quickly indicate whether the capacitor to be detected fails through the capacitance state indicating module, and can improve the detection efficiency of the capacitor to be detected. Meanwhile, the capacitor detection system provided by the invention can know the working temperature of the capacitor to be detected through the temperature control module, and can detect the capacitor to be detected at a specific temperature, so that the capacitor to be detected is closer to the state in an actual use environment, and the detection result is more accurate and has higher reference value.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A capacitance detection device is characterized by comprising a capacitance module to be detected, a capacitance state indicating module and a temperature control module; wherein the content of the first and second substances,
the capacitor module to be tested comprises a first resistor and N pairs of wiring terminals, wherein N is more than or equal to 1; the first end of the first resistor is used for connecting a first power supply, one connecting terminal of each pair of connecting terminals is connected with the second end of the first resistor, and the other connecting terminal of each pair of connecting terminals is grounded; each pair of the wiring terminals is used for connecting a capacitor to be tested;
the first end of the capacitance state indicating module is connected with the first end of the first resistor, and the second end of the capacitance state indicating module is connected with the second end of the first resistor;
the temperature control module is used for being in heat conduction contact with the capacitor module to be tested so as to control the working temperature of the capacitor to be tested.
2. The capacitance detection device of claim 1, wherein the capacitance state indication module comprises a second resistor and an indication element; wherein the content of the first and second substances,
the first end of the second resistor is the first end of the capacitance state indicating module, the second end of the second resistor is connected with the first end of the indicating element, and the second end of the indicating element is the second end of the capacitance state indicating module.
3. The capacitance detection device according to claim 2, wherein the indication element is a buzzer, a positive pole of the buzzer is a first end of the indication element, and a negative pole of the buzzer is a second end of the indication element.
4. The capacitance sensing device of claim 2, wherein the indicator element is a light emitting diode, an anode of the light emitting diode being the first end of the indicator element and a cathode of the light emitting diode being the second end of the indicator element.
5. The capacitance detection device according to claim 1, wherein the temperature control module comprises a heating element and M temperature acquisition units, M ≧ 1;
the first end of the heating element is used for being connected with a second power supply, the second end of the heating element is grounded, and the heating element is used for being in heat conduction contact with the capacitor module to be tested;
m the temperature acquisition unit is used for gathering the operating temperature of the electric capacity that awaits measuring, M the output of temperature acquisition unit is used for being connected with temperature data output device.
6. The capacitance detection device of claim 5, wherein the heating element is a cement resistor.
7. The capacitance detection device of claim 5, wherein the first power source is a first adjustable voltage source and the second power source is a second adjustable voltage source.
8. A capacitance detection system comprising a first power supply and a capacitance detection device according to any one of claims 1 to 4, the first power supply being connected to a first terminal of the first resistor in the capacitance detection device.
9. The capacitance detection system of claim 8, wherein the capacitance detection system comprises a second power supply and a temperature data output device; the temperature control module comprises a heating element and M temperature acquisition units, wherein M is more than or equal to 1;
the first end of the heating element is connected with the second power supply, the second end of the heating element is grounded, and the heating element is used for being in heat conduction contact with the capacitor module to be tested;
m the temperature acquisition unit is used for gathering the operating temperature of the electric capacity that awaits measuring, M the output of temperature acquisition unit with temperature data output device connects.
10. The capacitive sensing system of claim 9 wherein the heating element is a cement resistor.
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| CN202010193228.2A CN111337858A (en) | 2020-03-18 | 2020-03-18 | Capacitance detection device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010193228.2A CN111337858A (en) | 2020-03-18 | 2020-03-18 | Capacitance detection device and system |
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| CN111337858A true CN111337858A (en) | 2020-06-26 |
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| CN202010193228.2A Pending CN111337858A (en) | 2020-03-18 | 2020-03-18 | Capacitance detection device and system |
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Cited By (1)
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| CN113589200A (en) * | 2021-07-30 | 2021-11-02 | 宁波三星医疗电气股份有限公司 | Supercapacitor connection fault detection method and system |
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