CN214310702U - Detection circuit and device for inductor - Google Patents
Detection circuit and device for inductor Download PDFInfo
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- CN214310702U CN214310702U CN202120219803.1U CN202120219803U CN214310702U CN 214310702 U CN214310702 U CN 214310702U CN 202120219803 U CN202120219803 U CN 202120219803U CN 214310702 U CN214310702 U CN 214310702U
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Abstract
The utility model discloses a detection circuitry and device for inductor for detect the inductor that awaits measuring. The detection circuit comprises an integrated voltage control module, an adjusting circuit module and a resonant frequency output module; the integrated voltage control module comprises a voltage control chip, wherein the voltage control chip comprises a load pin, a bias pin and a signal output pin; the adjusting circuit module is connected with the load pin, two ends of the inductor to be tested are respectively connected with the load pin and the bias pin, and the resonant frequency output module is connected with the signal output pin. The two ends of the inductor to be tested are connected to the load pin and the bias pin respectively, then the variable resistor is adjusted to enable the circuit to resonate, an oscillation signal with a certain frequency can be output at the signal output pin, and at the moment, the frequency value is measured by the frequency meter, and the value of the inductor to be tested can be obtained through calculation. The detection circuit is suitable for detecting low-frequency inductors and high-frequency inductors, and is wide in measurement range, high in measurement precision and reliable and stable in circuit operation.
Description
Technical Field
The utility model relates to an inductance detects accessory technical field, especially relates to a detection circuitry and device for inductor.
Background
The inductor is formed by winding an insulated wire, such as an enameled wire or a yarn-covered wire, and mainly comprises a framework, a winding, a shielding case, a packaging material, a magnetic core or an iron core, and the like, and is an electromagnetic induction element with the characteristics of quickest efficiency, quickest speed, low consumption and environmental protection.
Therefore, the application of the inductor in life is very wide, and daily communication equipment such as mobile phones, pagers, oscillators, radio frequency transceivers, wireless local area networks, Bluetooth modules, GPS products and the like have inductors.
However, in the electronic design process, electronic engineers often use inductors with different parameters, and need to measure the inductance of the inductor coil, but the inductance of the inductors is not easy to measure like resistance capacitance, and although a digital multimeter is used for measurement, the measurement range is limited. Therefore, it is desirable to provide a detection circuit and a detection device for an inductor to solve the problems of the prior art.
SUMMERY OF THE UTILITY MODEL
To the defect that above-mentioned prior art exists, the utility model aims to provide an inductor is with detection circuitry and device.
In order to achieve the above object, the present invention provides a detection circuit for an inductor, for detecting an inductor to be detected, the detection circuit comprising an integrated voltage control module, an adjustment circuit module and a resonant frequency output module; the integrated voltage control module comprises a voltage control chip, wherein the voltage control chip comprises a load pin, a bias pin and a signal output pin; the adjusting circuit module is connected with the load pin, two ends of the inductor to be tested are respectively connected with the load pin and the bias pin, and the resonant frequency output module is connected with the signal output pin.
Preferably, the adjusting circuit module includes a variable resistor, a first voltage-dividing resistor, a varactor diode, and a first capacitor, a first end of the variable resistor is connected to an external power supply, a second end of the variable resistor is connected to the first end of the first voltage-dividing resistor, an anode of the varactor diode and a third end of the variable resistor are both connected to a power ground, a second end of the first voltage-dividing resistor and a cathode of the varactor diode are both connected to the first end of the first capacitor, and a second end of the first capacitor is connected to the load pin.
Preferably, the bias pin is further provided with a first bypass capacitor module, a first end of the first bypass capacitor module is connected with the bias pin, and a second end of the first bypass capacitor module is connected with a power ground.
Preferably, the first bypass capacitor module is in a capacitor parallel structure and includes at least one second capacitor, a first end of the second capacitor is connected to the bias pin, and a second end of the second capacitor is connected to a power ground.
Preferably, the resonant frequency output module includes a third capacitor and a second voltage-dividing resistor, a first end of the third capacitor is connected to the signal output pin, a second end of the third capacitor is connected to a first end of the second voltage-dividing resistor, and a second end of the second voltage-dividing resistor outputs the resonant frequency signal.
Preferably, the detection circuit comprises a voltage conversion module, the voltage-controlled chip comprises at least two power supply pins, and the voltage conversion module is connected with the two power supply pins.
Preferably, the voltage conversion module includes a conversion chip, a third voltage dividing resistor, a first filter capacitor, a second filter capacitor and a third filter capacitor, and the conversion chip includes a voltage input pin and a voltage output pin; the voltage input pin is connected with an external power supply and is connected with a power ground through the first filter capacitor, the voltage output pin is connected with a first end of the third voltage dividing resistor and is connected with the power ground through the second filter capacitor, and a second end of the third voltage dividing resistor is connected with the two power pins and is connected with the power ground through the third filter capacitor.
Preferably, the detection circuit comprises a second bypass capacitor module, the voltage-controlled chip comprises two grounding pins and an automatic power generation control pin, the automatic power generation control pin is connected with a power ground through the second bypass capacitor module, and the two grounding pins are connected with the power ground.
Preferably, the second bypass capacitor module is in a capacitor parallel structure and comprises at least one fourth capacitor, a first end of the fourth capacitor is connected with the automatic power generation control pin, and a second end of the fourth capacitor is connected with a power ground.
The device for the inductor comprises a first connection input port, a second connection output port and a fingerprint on-off key, wherein the first connection input port is used for being connected with an inductor to be tested, the second connection output port is used for outputting a resonant frequency signal, and the fingerprint on-off key is used for controlling the detection circuit for the inductor to normally work.
Compared with the prior art, the beneficial effects of the utility model are that:
1. a detection circuit for an inductor is used for detecting an inductor to be detected. The detection circuit comprises an integrated voltage control module, an adjusting circuit module and a resonant frequency output module; the integrated voltage control module comprises a voltage control chip, wherein the voltage control chip comprises a load pin, a bias pin and a signal output pin; the adjusting circuit module is connected with the load pin, two ends of the inductor to be tested are respectively connected with the load pin and the bias pin, and the resonant frequency output module is connected with the signal output pin. When the inductance of the inductor to be detected is detected, only the two ends of the inductor to be detected are respectively connected to the load pin and the bias pin, then the variable resistor is adjusted to enable the circuit to resonate, an oscillation signal with a certain frequency can be output at the signal output pin, and at the moment, the frequency value is measured by the frequency meter, and the value of the inductor to be detected can be obtained through calculation. The detection circuit is suitable for detecting low-frequency inductors and high-frequency inductors, and is wide in measurement range, high in measurement precision and reliable and stable in circuit operation.
2. The utility model provides a value that inductor was used, the user only need insert first connection input port respectively with the both ends of the inductor that awaits measuring, then connects the delivery outlet with the frequency meter and is connected with the second, starts this inductor with the device through the fingerprint on-off key, can connect the delivery outlet at the second and export resonance frequency signal to the frequency meter, reachs the inductor that awaits measuring with the accessible calculation, not only measurement accuracy is high, and simple to use has improved detection efficiency greatly moreover.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and those skilled in the art can also obtain other drawings without creative efforts.
Fig. 1 is a schematic circuit schematic structure diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram provided in the second embodiment of the present invention.
Description of reference numerals:
10. integrating a voltage control module; 11. a regulating circuit module; 12. a resonant frequency output module; 13. a first bypass capacitor module; 14. a second bypass capacitance module; 15. a voltage conversion module; 20. an inductor device; 21. a first connection input port; 22. a second connection output port; 23. fingerprint switch key.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The terms "including" and "having," and any variations thereof, in the description and claims of the invention and the above description of the drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. In the specification and claims of the present invention or in the drawings, directional terms such as "upper", "lower", "left", "right", "front", "rear", "side" and the like are used for relative positional description with respect to the drawings provided, and are not used to describe a specific order of actual products.
Referring to fig. 1, a first embodiment of the present invention provides a detection circuit for an inductor, which is used to detect an inductor Lx to be detected. The detection circuit comprises an integrated voltage control module, an adjusting circuit module and a resonant frequency output module; the integrated voltage control module comprises a voltage control chip U2, wherein the voltage control chip U2 comprises a load pin TANK, a BIAS pin BIAS and a signal OUTPUT pin OUTPUT; the adjusting circuit module is connected with a load pin TANK, two ends of the inductor Lx to be tested are respectively connected with the load pin TANK and the BIAS pin BIAS, and the resonant frequency OUTPUT module is connected with a signal OUTPUT pin OUTPUT. When the inductance of the inductor Lx to be detected is detected, the two ends of the inductor Lx to be detected are only required to be respectively connected to the load pin TANK and the BIAS pin BIAS, then the variable resistor R2 is adjusted to enable the circuit to resonate, an oscillation signal with a certain frequency can be OUTPUT at the signal OUTPUT pin OUTPUT, at the moment, the frequency value is measured by the frequency meter, and the value of the inductor Lx to be detected can be obtained through calculation.
The adjusting circuit module comprises a variable resistor R2, a first voltage-dividing resistor R3, a variable capacitance diode VHF and a first capacitor C5, wherein the first end of the variable resistor R2 is connected with an external power supply 15V, the second end of the variable resistor R2 is connected with the first end of the first voltage-dividing resistor R3, the anode of the variable capacitance diode VHF and the third end of the variable resistor R2 are both connected with a power ground GND, the second end of the first voltage-dividing resistor R3 and the cathode of the variable capacitance diode VHF are both connected with the first end of the first capacitor C5, and the second end of the first capacitor C5 is connected with a load pin TANK. By adjusting the resistance of the variable resistor R2 to divide the voltage of the external power supply 15V, different voltage outputs can be obtained, and the voltage is applied to both ends of the varactor VHF through the first voltage dividing resistor R3, so that different capacitances can be obtained.
The BIAS pin BIAS is further provided with a first bypass capacitor module, the first end of the first bypass capacitor module is connected with the BIAS pin BIAS, and the second end of the first bypass capacitor module is connected with a power ground GND. Specifically, the first bypass capacitor module is in a capacitor parallel structure and includes at least one second capacitor C4, a first end of the second capacitor C4 is connected to the BIAS pin BIAS, and a second end of the second capacitor C4 is connected to the power ground GND.
The resonant frequency OUTPUT module comprises a third capacitor C6 and a second voltage-dividing resistor R4, wherein the first end of the third capacitor C6 is connected with a signal OUTPUT pin OUTPUT, the second end of the third capacitor C6 is connected with the first end of the second voltage-dividing resistor R4, the second end of the second voltage-dividing resistor R4 OUTPUTs a resonant frequency signal, the resonant frequency signal is input into an externally-connected frequency meter, a frequency value can be obtained through the frequency meter, and the inductance of the inductor Lx to be measured can be calculated through the frequency value.
Referring to fig. 1, the detection circuit includes a voltage conversion module, the voltage control chip U2 includes at least two power pins VCC, and the voltage conversion module is connected to the two power pins VCC. Specifically, the voltage conversion module includes a conversion chip U1, a third voltage dividing resistor R1, a first filter capacitor C1, a second filter capacitor C2 and a third filter capacitor C3, and the conversion chip U1 includes a voltage input pin IN and a voltage output pin OUT; the voltage input pin IN is connected with an external power supply 15V and is connected with a power ground GND through a first filter capacitor C1, the voltage output pin OUT is connected with a first end of a third voltage-dividing resistor R1 and is connected with the power ground GND through a second filter capacitor C2, and a second end of the third voltage-dividing resistor is connected with two power supply pins VCC and is connected with the power ground GND through a third filter capacitor C3.
With reference to fig. 1, the detection circuit includes a second bypass capacitor module, the voltage-controlled chip U2 includes two ground pins VEE and an auto-power-generation control pin AGC, the auto-power-generation control pin AGC is connected to the power ground GND through the second bypass capacitor module, and the two ground pins are connected to the power ground GND. Specifically, the second bypass capacitor module is in a capacitor parallel structure and comprises at least one fourth capacitor C7, a first end of the fourth capacitor C7 is connected with the automatic power generation control pin AGC, and a second end of the fourth capacitor C7 is connected with the power ground GND.
As a modification of the first embodiment, when the output frequency is 1MHz to 50MHz, the capacitance values of the first bypass capacitor module and the second bypass capacitor module of the present invention may be 0.1 μ F. That is, at higher frequencies, smaller capacitance values are used, and at lower frequencies, larger capacitance values are used. It should be noted that the first bypass capacitor module and the second bypass capacitor module should be as close to the pin of the voltage control chip U2 as possible in order to avoid reducing the wire inductance. When the frequency is higher than 100MHz, a resistor can be connected in series between the auto-generation control pin AGC and the signal output pin to make the output resonant frequency signal sharper.
A second embodiment of the utility model provides a device for inductor, it includes that first connection input port, second connect delivery outlet and fingerprint on-off switch to control detection circuitry for inductor and normally work. The user only needs to connect the two ends of the inductor Lx to be measured into the first connecting input port respectively, then the frequency meter is connected with the second connecting output port, the device for the inductor is started through the fingerprint on-off key, the resonance frequency signal can be output to the frequency meter through the second connecting output port, and the value of the inductor Lx to be measured can be obtained through calculation. The utility model discloses not only be suitable for and detect low frequency inductor, still be applicable to and detect high frequency inductor, its measuring range is wide, and measurement accuracy is high, and circuit reliable operation is stable moreover.
It should be noted that the external power supply 15V and the ground GND of the present invention are prior art, and are not specifically developed and limited herein.
The above description is only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the utility model, or the direct or indirect application in other related technical fields, are included in the patent protection scope of the utility model.
Claims (10)
1. A detection circuit for an inductor is used for detecting an inductor to be detected, and is characterized in that: the detection circuit comprises an integrated voltage control module, an adjusting circuit module and a resonant frequency output module; the integrated voltage control module comprises a voltage control chip, wherein the voltage control chip comprises a load pin, a bias pin and a signal output pin; the adjusting circuit module is connected with the load pin, two ends of the inductor to be tested are respectively connected with the load pin and the bias pin, and the resonant frequency output module is connected with the signal output pin.
2. The detection circuit for an inductor according to claim 1, characterized in that: the adjusting circuit module comprises a variable resistor, a first divider resistor, a variable capacitance diode and a first capacitor, wherein a first end of the variable resistor is connected with an external power supply, a second end of the variable resistor is connected with a first end of the first divider resistor, an anode of the variable capacitance diode and a third end of the variable resistor are both connected with a power ground, a second end of the first divider resistor and a cathode of the variable capacitance diode are both connected with a first end of the first capacitor, and a second end of the first capacitor is connected with the load pin.
3. The detection circuit for an inductor according to claim 1, characterized in that: the bias voltage pin is further provided with a first bypass capacitor module, the first end of the first bypass capacitor module is connected with the bias voltage pin, and the second end of the first bypass capacitor module is connected with a power ground.
4. The detection circuit for an inductor according to claim 3, characterized in that: the first bypass capacitor module is in a capacitor parallel structure and comprises at least one second capacitor, the first end of the second capacitor is connected with the bias pin, and the second end of the second capacitor is connected with a power ground.
5. The detection circuit for an inductor according to claim 1, characterized in that: the resonant frequency output module comprises a third capacitor and a second voltage-dividing resistor, wherein a first end of the third capacitor is connected with the signal output pin, a second end of the third capacitor is connected with a first end of the second voltage-dividing resistor, and a second end of the second voltage-dividing resistor outputs a resonant frequency signal.
6. The detection circuit for an inductor according to claim 1, characterized in that: the detection circuit comprises a voltage conversion module, wherein the voltage control chip comprises at least two power supply pins, and the voltage conversion module is connected with the two power supply pins.
7. The detection circuit for an inductor according to claim 6, wherein: the voltage conversion module comprises a conversion chip, a third voltage dividing resistor, a first filter capacitor, a second filter capacitor and a third filter capacitor, wherein the conversion chip comprises a voltage input pin and a voltage output pin; the voltage input pin is connected with an external power supply and is connected with a power ground through the first filter capacitor, the voltage output pin is connected with a first end of the third voltage dividing resistor and is connected with the power ground through the second filter capacitor, and a second end of the third voltage dividing resistor is connected with the two power pins and is connected with the power ground through the third filter capacitor.
8. The detection circuit for an inductor according to claim 6, wherein: the detection circuit comprises a second bypass capacitor module, the voltage-controlled chip comprises two grounding pins and an automatic power generation control pin, the automatic power generation control pin is connected with a power ground through the second bypass capacitor module, and the two grounding pins are connected with the power ground.
9. The detection circuit for an inductor according to claim 8, wherein: the second bypass capacitor module is of a capacitor parallel structure and comprises at least one fourth capacitor, the first end of the fourth capacitor is connected with the automatic power generation control pin, and the second end of the fourth capacitor is connected with a power ground.
10. An apparatus for an inductor, comprising: the detection circuit comprises a first connection input port for connecting an inductor to be detected, a second connection output port for outputting a resonant frequency signal and a fingerprint switch key so as to control the detection circuit for the inductor to work normally according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219803.1U CN214310702U (en) | 2021-01-27 | 2021-01-27 | Detection circuit and device for inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219803.1U CN214310702U (en) | 2021-01-27 | 2021-01-27 | Detection circuit and device for inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214310702U true CN214310702U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120219803.1U Expired - Fee Related CN214310702U (en) | 2021-01-27 | 2021-01-27 | Detection circuit and device for inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214310702U (en) |
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2021
- 2021-01-27 CN CN202120219803.1U patent/CN214310702U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210928 Termination date: 20220127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |