CN211505722U - Failure detection circuit and electronic equipment - Google Patents
Failure detection circuit and electronic equipment Download PDFInfo
- Publication number
- CN211505722U CN211505722U CN201921765885.9U CN201921765885U CN211505722U CN 211505722 U CN211505722 U CN 211505722U CN 201921765885 U CN201921765885 U CN 201921765885U CN 211505722 U CN211505722 U CN 211505722U
- Authority
- CN
- China
- Prior art keywords
- module
- detected
- detection circuit
- indication
- switch control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a failure detection circuit and electronic equipment, wherein the failure detection circuit comprises a detection module and a switch control module, and the switch control module is respectively electrically connected with the detection module and an element to be detected; the switch control module is used for controlling the on-off of the detection module and the element to be detected, and the detection module is used for detecting whether the element to be detected is invalid or not. The utility model discloses an inefficacy detection circuit simple structure, it is with low costs, it is complicated to have improved inefficacy detection circuit structure, the higher problem of cost, and inefficacy detection circuit utilizes switch control module to carry out isolation circuit's design, when can effectively detecting whether to detect the detection element and become invalid, has avoided introducing the problem that parasitic parameter influences the electrical property of inefficacy detection circuit.
Description
Technical Field
The embodiment of the utility model provides a circuit technical field especially relates to an inefficacy detection circuitry and electronic equipment.
Background
In order to prolong the service life of the electrical device and enhance the capability of the electrical device to resist external interference, some electrical devices, such as a set top box, are usually provided with a lightning protection device, such as an air discharge tube, a TVS (Transient diode) tube, a varistor, and an ESD (Electro-Static discharge) lightning protection device, at the front end of the electrical device, so as to improve the capability of the electrical device to resist damage of the external lightning environment.
However, the conventional lightning protection devices have service lives, and after hundreds of lightning impacts, the performance of the conventional lightning protection devices is reduced until the conventional lightning protection devices do not have a protection effect. The electrical equipment after lightning protection device became invalid does not have the interference killing feature to external thunder and lightning environment, when receiving the destruction of impact such as thunder and lightning surge once more, electrical equipment's life can shorten greatly.
SUMMERY OF THE UTILITY MODEL
The utility model provides an inefficacy detection circuitry and electronic equipment to realize inefficacy detection circuitry simple structure, it is with low costs, it is complicated to have improved inefficacy detection circuitry structure, and the higher problem of cost is detecting whether the component is inefficacy in can effectively detecting, has avoided introducing the problem that parasitic parameter influences inefficacy detection circuitry's electrical property.
In a first aspect, an embodiment of the present invention provides a failure detection circuit, including: the detection device comprises a detection module and a switch control module, wherein the switch control module is electrically connected with the detection module and an element to be detected respectively; the switch control module is used for controlling the on-off of the detection module and the element to be detected, and the detection module is used for detecting whether the element to be detected is invalid or not.
Further, the detection module includes: the detection control submodule is used for adjusting the output indication control signal according to the failure state of the element to be detected; and the indication sub-module is used for controlling the indication sub-module to adjust the indication state of the indication sub-module according to the received indication control signal.
Further, the detection control sub-module includes: the voltage divider is used for adjusting the output switch control signal according to the failure state of the element to be detected; a switching device for adjusting the output indication control signal according to the received switching control signal.
Furthermore, a first end of the voltage divider is connected to a first power signal, a second end of the voltage divider is electrically connected to a control end of the switch device, the second end of the voltage divider serves as a connection end of the detection module and the switch control module and is used for outputting the switch control signal, and the first end of the switch device outputs the indication control signal.
Further, the second end of the switching device is electrically connected with the first end of the voltage dividing device; the switching device includes a PNP type transistor.
Further, a second terminal of the switching device is electrically connected with a second terminal of the voltage dividing device; the switching device includes an NPN transistor.
Further, the indication sub-module includes a sound indication sub-module and/or a display indication sub-module.
Furthermore, a first end of the switch control module is electrically connected with the detection module, a second end of the switch control module is electrically connected with a first end of the element to be detected, and a second end of the element to be detected is connected to a second power supply signal.
Further, the switch control module comprises a relay or a single-pole single-throw switch or a key switch.
In a second aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes the failure detection circuit according to the first aspect.
The utility model discloses a failure detection circuit and electronic equipment, wherein the failure detection circuit comprises a detection module and a switch control module, and the switch control module is respectively electrically connected with the detection module and an element to be detected; the switch control module is used for controlling the on-off of the detection module and the element to be detected, and the detection module is used for detecting whether the element to be detected is invalid or not. The utility model discloses an inefficacy detection circuit simple structure, it is with low costs, it is complicated to have improved inefficacy detection circuit structure, the higher problem of cost, and inefficacy detection circuit utilizes switch control module to carry out isolation circuit's design, when can effectively detecting whether to detect the detection element and become invalid, has avoided introducing the problem that parasitic parameter influences the electrical property of inefficacy detection circuit.
Drawings
Fig. 1 is a schematic structural diagram of a failure detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific circuit structure of a failure detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a specific circuit structure of another failure detection circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic diagram of a failure detection circuit according to an embodiment of the present invention. As shown in fig. 1, the failure detection circuit includes: the detection module 11 and the switch control module 12, the switch control module 12 is electrically connected with the detection module 11 and the element to be detected 13 respectively. The switch control module 12 is used for controlling the on-off of the detection module 11 and the element 13 to be detected, and the detection module 11 is used for detecting whether the element 13 to be detected is invalid or not.
Specifically, the switch control module 12 can control on/off between the detection module 11 and the element 13 to be detected, the switch control module 12 can be arranged to be connected in series between the detection module 11 and the element 13 to be detected, when the element 13 to be detected needs to be detected whether to fail, the switch control module 12 can be controlled to be switched on, and after the detection is finished, the switch control module 12 can be switched off.
For some electrical equipment, such as a set top box and the like, lightning is led in through a radio frequency input signal, and parasitic parameters are introduced into the existing protection circuit, so that radio frequency signal distortion is caused, and the electrical performance is influenced. The embodiment of the utility model discloses failure detection circuit only triggers switching control module 12 constantly at a certain time, inserts radio frequency input circuit promptly, utilizes switching control module 12 to keep apart detection module 11 and wait to detect component 13 when need not to examine, prevents to detect component 13 and inserts the performance that radio frequency input signal influences the product, has effectively avoided the influence of radio frequency input because the parasitic parameter that failure detection circuit arouses. Additionally, the utility model discloses a failure detection circuit simple structure, it is with low costs, it is complicated to have improved failure detection circuit structure, the higher problem of cost.
Illustratively, the component 13 to be detected may be a lightning protection device in electronic equipment, such as an air discharge tube, a TVS tube, a varistor, an ESD lightning protection device, and the like.
The utility model discloses an inefficacy detection circuit simple structure, it is with low costs, it is complicated to have improved inefficacy detection circuit structure, the higher problem of cost, and inefficacy detection circuit utilizes switch control module to carry out isolation circuit's design, when can effectively detecting whether to detect the detection element and become invalid, has avoided introducing the problem that parasitic parameter influences the electrical property of inefficacy detection circuit.
Optionally, as shown in fig. 1, the detection module 11 includes: the detection control submodule 21 is used for adjusting the output indication control signal according to the failure state of the element 13 to be detected; and the indication submodule 22 is used for controlling the indication submodule 22 to adjust the indication state of the indication submodule 22 according to the received indication control signal.
Specifically, the detection module 11 includes a detection control sub-module 21 and an indication sub-module 22, and when the failure detection circuit detects that the element 13 to be detected fails, the detection control sub-module 21 correspondingly outputs an indication control signal to the indication sub-module 22, and the indication sub-module 22 adjusts its indication state after receiving the indication control signal, such as whistling, flashing, displaying a preset prompt image, and the like, so as to prompt that the element 13 to be detected has failed.
If it is detected that the element 13 to be detected is not failed, the detection control sub-module 21 also correspondingly outputs an indication control signal indicating that the element 13 to be detected is not failed to the indication sub-module 22, and the indication sub-module 22 correspondingly adjusts the indication state of the indication sub-module after receiving the indication control signal, for example, the indication sub-module does not emit sound or emits sound different from a prompt sound when the element 13 to be detected is failed, does not light or flickers a light with a color different from that when the element 13 to be detected is failed, does not display a preset prompt image or displays an image different from that when the element 13 to be detected is failed, and the like, which indicates that the element 13. The state of failure of the element 13 to be detected can be visually detected by indicating the state of the submodule 22 only.
Optionally, the indication sub-module 22 includes a sound indication sub-module and/or a display indication sub-module.
The indication submodule 22 further includes one or two of a sound indication submodule and a display indication submodule, the sound indication submodule may be a device capable of making sound for prompting, such as a speaker, and the display indication submodule may be a device capable of making light, color or image for prompting, such as an LED indicator lamp and a liquid crystal display.
Alternatively, referring to fig. 1, the detection control sub-module 21 includes: the voltage dividing device 31, the voltage dividing device 31 is used for adjusting the output switch control signal according to the failure state of the element to be detected 13; a switching device 32, the switching device 32 being configured to adjust the output indication control signal according to the received switching control signal.
Specifically, the impedance of the element 13 to be detected is very large under normal conditions, when the element 13 to be detected fails, the impedance of the element 13 to be detected becomes small, and the voltage at the two ends of the voltage divider 31 is increased through the impedance voltage distribution between the voltage divider 31 in the detection control submodule 21 and the element 13 to be detected, and at this time, the switch device 32 can be controlled to be turned on, so that the switch device 32 can output an indication control signal to the indication submodule 22, so that the indication submodule 22 adjusts its own indication state to prompt that the element 13 to be detected has failed.
Optionally, as shown in fig. 1, a first end 1 of the voltage divider 31 is connected to the first power signal VCC1, a second end 2 of the voltage divider 31 is electrically connected to the control end 3 of the switch device 32 for outputting a switch control signal, the second end 2 of the voltage divider 31 serves as a connection end of the detection module 11 and the switch control module 12, and the first end 1 of the switch device 32 outputs an indication control signal.
Optionally, the second terminal 2 of the switching device 32 is electrically connected to the first terminal 1 of the voltage dividing device 31; switching device 32 comprises a PNP transistor.
Fig. 2 is a schematic diagram of a failure detection circuit when the switching device 32 is a PNP-type triode according to an embodiment of the present invention. Referring to fig. 2, taking the voltage divider 31 as a voltage dividing resistor R1, the switching device 32 as a PNP type triode Q1, and the element to be detected 13 as a TVS transistor as an example, when the TVS transistor needs to be detected, the switch control module 12 is turned on, and the detection module 11 is connected with the TVS transistor; if the TVS tube fails, the impedance thereof will decrease, the first power signal VCC1 may be set to be a high level signal, since the first terminal 1 of the voltage dividing resistor R1 is connected to the first power signal VCC1, and VCC1 is a high level, under the voltage dividing action of the voltage dividing resistor R1, if the impedance of the TVS tube decreases, the voltage difference between the base and the emitter of the transistor Q1 is greater than 0.7V, that is, the voltage difference between the second terminal 2 and the control terminal 3 of the transistor Q1 is greater than 0.7V, the transistor Q1 is turned on, the first terminal 1 of the transistor Q1 outputs the first power signal VCC1 to the indicating submodule 22, that is, the indicating control signal, so that the indicating submodule 22 adjusts its own indicating state to indicate that the TVS tube has failed, for example, the indicating submodule 22 may be set to emit light or sound when receiving the first power signal VCC1, the indicating submodule does not emit light or does not emit sound when not receiving the first power signal VCC1, thereby determining whether the device 13 to be detected is failed.
After the detection is finished, the switch control module 12 is controlled to be switched off, the failure detection circuit is isolated from the element 13 to be detected again, and the problem that the electrical performance of the equipment is influenced by introduced parasitic parameters caused by the fact that the failure detection circuit is still connected with the element 13 to be detected when the element 13 to be detected is not required to be detected is effectively solved.
Specifically, the electronic device may be configured to turn on the switch control module 12 when the electronic device is turned on, so as to detect the to-be-detected element 13, or to manually control the switch control module 12 to turn on when the to-be-detected element 13 needs to be detected.
Optionally, fig. 3 is a schematic diagram of a failure detection circuit when the switching device 32 is an NPN transistor according to an embodiment of the present invention. As shown in fig. 3, the second terminal 2 of the switching device 32 may also be electrically connected to the second terminal 2 of the voltage dividing device 31; the switching device 32 comprises an NPN-type transistor. Taking the voltage divider 31 as the voltage divider resistor R2 and the switch device 32 as the NPN type triode Q2 as an example, when the element 13 to be detected needs to be detected, the switch control module 12 is turned on, and the detection module 11 is connected with the element 13 to be detected; if the element 13 to be detected fails, the impedance thereof will decrease, the first power signal VCC1 may be set to be a high level signal, since the first end 1 of the voltage dividing resistor R2 is connected to the first power signal VCC1, and VCC1 is a high level, under the voltage dividing effect of the voltage dividing resistor R2, if the impedance of the element 13 to be detected decreases, the voltage difference between the base and the emitter of the transistor Q2 is greater than 0.7V, that is, the voltage difference between the second end 2 and the control end 3 of the transistor Q2 is greater than 0.7V, the transistor Q2 is turned on, the first end 1 of the transistor Q2 outputs the first power signal VCC1 to the indication submodule 22, that is, the indication control signal, so that the indication submodule 22 adjusts its own indication state to indicate that the element 13 to be detected has failed, for example, the indication submodule 22 may be set to emit light or sound when receiving the first power signal VCC1, the indication submodule does not emit light or does not emit sound when not receive the first power signal VCC1, thereby determining whether the device 13 to be detected is failed.
Optionally, referring to fig. 1 and fig. 3, the first end 1 of the switch control module 12 is electrically connected to the detection module 11, the second end 2 of the switch control module 12 is electrically connected to the first end 1 of the element to be detected 13, and the second end 2 of the element to be detected 13 is connected to the second power signal GND.
Specifically, referring to fig. 3, the second power signal GND is a ground level, when the element to be detected 13 needs to be detected, the switch control module 12 is turned on, and the detection module 11 is connected to the element to be detected 13; if the element 13 to be detected fails, the impedance of the element to be detected is reduced, because the first end 1 of the voltage dividing resistor R2 is connected with the first signal power supply VCC1, the first signal power supply VCC1 is at a high level, the second end 2 of the element 13 to be detected is connected with the second power supply signal GND, and the second power supply signal GND is at a ground level, under the voltage dividing effect of the voltage dividing resistor R2, if the impedance of the element 13 to be detected is reduced, the voltage difference between two ends of the voltage dividing resistor R2 is increased, the triode Q2 is conducted, the first end 1 of the triode Q2 outputs the first power supply signal VCC1 to the indication submodule 22, namely, the indication control signal is used for enabling the indication submodule 22 to adjust the self indication state, and prompting that the element 13 to be.
Optionally, the switch control module 12 includes a relay or a single pole single throw switch or a push button switch.
Specifically, the switch control module 12 may be one of a relay, a single-pole single-throw switch, or a push-button switch, and may also be another switch device with an on-off function. The switch control module 12 is communicated with the element 13 to be detected only at a certain trigger moment, the trigger moment can be freely set, the device can be started, and other moments needing to detect the element 13 to be detected can also be set, after the detection is finished, the switch control module 12 is controlled to be disconnected, the failure detection circuit is isolated from the element 13 to be detected again, and the failure detection circuit is prevented from introducing parasitic parameters to influence the electrical performance of the device.
The utility model also provides an electronic equipment, this electronic equipment include the aforesaid inefficacy detection circuitry, consequently possess above-mentioned embodiment beneficial effect, here no longer describe, electronic equipment for example can be the consumer that has the lightning protection device such as STB.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A failure detection circuit, comprising:
the detection device comprises a detection module and a switch control module, wherein the switch control module is electrically connected with the detection module and an element to be detected respectively;
the switch control module is used for controlling the on-off of the detection module and the element to be detected, and the detection module is used for detecting whether the element to be detected is invalid or not.
2. The failure detection circuit of claim 1, wherein the detection module comprises:
the detection control submodule is used for adjusting the output indication control signal according to the failure state of the element to be detected;
and the indication sub-module is used for controlling the indication sub-module to adjust the indication state of the indication sub-module according to the received indication control signal.
3. The failure detection circuit of claim 2, wherein the detection control sub-module comprises:
the voltage divider is used for adjusting the output switch control signal according to the failure state of the element to be detected;
a switching device for adjusting the output indication control signal according to the received switching control signal.
4. The failure detection circuit according to claim 3, wherein a first end of the voltage divider is connected to a first power signal, a second end of the voltage divider is electrically connected to a control end of the switch device for outputting the switch control signal, the second end of the voltage divider is used as a connection end of the detection module and the switch control module, and the first end of the switch device outputs the indication control signal.
5. The failure detection circuit of claim 4, wherein the second terminal of the switching device is electrically connected to the first terminal of the voltage divider device;
the switching device includes a PNP type transistor.
6. The failure detection circuit of claim 4, wherein the second terminal of the switching device is electrically connected to the second terminal of the voltage divider device;
the switching device includes an NPN transistor.
7. The failure detection circuit according to any of claims 2-6, wherein the indication submodule comprises an audible indication submodule and/or a display indication submodule.
8. The failure detection circuit according to claim 1, wherein a first end of the switch control module is electrically connected to the detection module, a second end of the switch control module is electrically connected to a first end of the element to be detected, and a second end of the element to be detected is connected to a second power signal.
9. The failure detection circuit of claim 8, wherein the switch control module comprises a relay or a single pole single throw switch or a push button switch.
10. An electronic device, characterized in that the electronic device comprises a failure detection circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921765885.9U CN211505722U (en) | 2019-10-21 | 2019-10-21 | Failure detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921765885.9U CN211505722U (en) | 2019-10-21 | 2019-10-21 | Failure detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211505722U true CN211505722U (en) | 2020-09-15 |
Family
ID=72407030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921765885.9U Active CN211505722U (en) | 2019-10-21 | 2019-10-21 | Failure detection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211505722U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466649A (en) * | 2021-06-29 | 2021-10-01 | 西安交通大学 | Method for judging failure reason of SiC MOSFET in surge current test |
| CN115588973A (en) * | 2022-11-24 | 2023-01-10 | 苏州浪潮智能科技有限公司 | Transient diode failure monitoring circuit |
-
2019
- 2019-10-21 CN CN201921765885.9U patent/CN211505722U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466649A (en) * | 2021-06-29 | 2021-10-01 | 西安交通大学 | Method for judging failure reason of SiC MOSFET in surge current test |
| CN113466649B (en) * | 2021-06-29 | 2022-10-25 | 西安交通大学 | Method for judging failure reason of SiC MOSFET in surge current test |
| CN115588973A (en) * | 2022-11-24 | 2023-01-10 | 苏州浪潮智能科技有限公司 | Transient diode failure monitoring circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211505722U (en) | Failure detection circuit and electronic equipment | |
| US9088157B2 (en) | Boost type power converting apparatus with protection circuit | |
| CA2876696A1 (en) | Audio interface self-adaption device | |
| US20120327544A1 (en) | Overvoltage protection circuit | |
| US8189312B2 (en) | Circuit arrangement for detecting undervoltage in an energy source | |
| US8437484B2 (en) | Switching circuit and electronic device using the same | |
| US8395520B2 (en) | Device for monitoring voltage of motherboard | |
| US8258971B2 (en) | Low voltage warning circuit | |
| US20130134801A1 (en) | Power supply circuit for antenna, antenna control system, and digital communication device | |
| CN212410835U (en) | Detection circuit of alternating current input line and socket with detection circuit | |
| TWI544680B (en) | Power supply circuit for antenna, antenna control system, and digital communication device | |
| US20140347775A1 (en) | Battery protection circuit | |
| US20140347063A1 (en) | Fan test device | |
| RU2007114698A (en) | VOLTAGE SUPPRESSION DIAGRAM AND PANEL TELEVISION RECEIVER | |
| JP2009016046A (en) | Outlet device | |
| US20190165569A1 (en) | Input protection circuit | |
| CN216451531U (en) | Display circuit for displaying working state of sound equipment | |
| EP2637281A2 (en) | Charge indicator circuit | |
| CN214851414U (en) | Broadcast control cabinet for fault self-inspection | |
| CN102872501A (en) | Miniaturized intelligent infusion monitoring circuit and monitor | |
| CN111436175A (en) | Emergency marker lamp and lamp management system | |
| KR100572807B1 (en) | Short Protection Device | |
| CN104218537A (en) | An anti-reversal and undervoltage protection circuit for a battery and a lamp | |
| CN217133980U (en) | Display screen safety protection circuit and display device | |
| CN212435354U (en) | Low current output current limiting protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |