Carbon fiber lamp tube detection circuit and detection method

Abstract

The invention provides a carbon fiber lamp tube detection circuit and detection method. The detection circuit comprises a live wire input end, a zero line input end, a three-gear switch, a first diode, an alarm indicating lamp, a thyristor, a detected carbon fiber lamp tube and a driving circuit. Wherein the three-gear switch is connected with a live wire input end, a positive electrode of the first diode and a tested carbon fiber lamp tube; the cathode of the first diode is connected with an alarm indicating lamp and a thyristor. The alarm indicating lamp is connected with the zero line input end. The thyristor is respectively connected with the cathode of the first diode and the driving circuit; and the driving circuit is connected with the output end of the tested carbon fiber lamp tube. According to the invention, the convenience of carbon fiber lamp tube detection can be improved.

Description

Technical Field

[0001] This application relates to the technical field of power products, and particularly to a detection circuit and a detection method for carbon fiber tubes. Background Art

[0002] Since carbon fiber tubes have a heat preservation effect, users usually set carbon fiber tubes in piglet pens to help weak piglets keep warm after birth and promote their healthy physical development.

[0003] During the use of carbon fiber tubes, the filament is prone to breakage. Therefore, when users conduct daily pen inspections, they will intentionally open the heat preservation cover and visually observe the state of the filament in the carbon fiber tube to determine whether the filament is broken. However, the carbon fiber tube generates heat but does not emit light, and the illuminance is very low. Therefore, it is very difficult to detect whether the carbon fiber tube is in normal use by this manual visual observation method. If the filament breaks and is not replaced in time, the survival rate of piglets will decrease, thereby affecting the income. Summary of the Invention

[0004] This application provides a detection circuit and a detection method for carbon fiber tubes, which can improve the convenience of carbon fiber tube detection.

[0005] In a first aspect, this application provides a detection circuit for a carbon fiber tube. The detection circuit includes: a live wire input terminal, a neutral wire input terminal, a three-position switch, a first diode, an alarm indicator light, a thyristor, a carbon fiber tube to be measured, and a drive circuit;

[0006] Among them, the three-position switch is connected to the live wire input terminal, the positive electrode of the first diode, and the carbon fiber tube to be measured;

[0007] The negative electrode of the first diode is connected to the alarm indicator light and the thyristor;

[0008] The alarm indicator light is also connected to the neutral wire input terminal;

[0009] The thyristor is respectively connected to the negative electrode of the first diode and the drive circuit;

[0010] The drive circuit is connected to the output terminal of the carbon fiber tube to be measured.

[0011] A further technical solution of it is that the drive circuit includes a voltage drop diode and a first current limiting resistor;

[0012] Among them, the thyristor is respectively connected to the voltage drop diode and the first current limiting resistor;

[0013] The voltage drop diode and the first current limiting resistor are respectively connected to the carbon fiber tube to be measured.

[0014] A further technical solution thereof is that the carbon fiber lamp tube detection circuit further includes a second diode, wherein the positive electrode of the second diode is connected to the neutral wire input end, and the negative electrode is connected to the three - position switch.

[0015] A further technical solution thereof is that the three - position switch is a one - way rectifying diode, and the first diode and the second diode are one - way light - emitting diodes.

[0016] A further technical solution thereof is that the detection circuit further includes a second current - limiting resistor, wherein the second current - limiting resistor is connected between the alarm indicator light and the first diode.

[0017] In a second aspect, the present application provides a method for detecting a carbon fiber lamp tube. The carbon fiber lamp tube detection circuit includes a three - position switch, a first diode, a second diode, an alarm indicator light, a thyristor, a carbon fiber lamp tube to be detected, and a voltage - drop diode. Among them, the three - position switch is connected to the first diode, the second diode, and the carbon fiber lamp tube to be detected. The thyristor is respectively connected to the first diode and the voltage - drop diode, and the voltage - drop diode is also connected to the carbon fiber lamp tube to be detected;

[0018] The method includes:

[0019] Controlling the working state of the thyristor by using the voltage - drop diode;

[0020] Based on the position of the three - position switch and the working state of the thyristor, obtaining the lighting conditions of the first diode, the second diode, and the alarm indicator light;

[0021] Based on the lighting conditions of the first diode, the second diode, and the alarm indicator light, obtaining the detection result of the carbon fiber lamp tube to be detected.

[0022] A further technical solution thereof is that the positions of the three - position switch include a full - power position and a half - power position, and the working states of the thyristor include a conducting state and a cut - off state;

[0023] Based on the position of the three - position switch and the working state of the thyristor, obtaining the lighting conditions of the first diode, the second diode, and the alarm indicator light, including:

[0024] When the three - position switch is in the full - power position and the thyristor is in the conducting state, then the first diode and the second diode emit light, and the alarm indicator light does not emit light;

[0025] When the three - position switch is in the full - power position and the thyristor is in the cut - off state, then the first diode, the second diode, and the alarm indicator light all emit light;

[0026] When the three - position switch is in the half - power position and the thyristor is in the conducting state, then the first diode emits light, and the second diode and the alarm indicator light do not emit light;

[0027] When the three - gear switch is in the half - power gear and the thyristor is in the cut - off state, the first diode emits light and the alarm indicator emits light, while the second diode does not emit light.

[0028] A further technical solution is that the detection results of the carbon fiber tube to be measured include a normal state and an abnormal state. Based on the light - emitting conditions of the first diode, the second diode, and the alarm indicator, the detection results of the carbon fiber tube to be measured are obtained, including:

[0029] When both the first diode and the alarm indicator emit light, or when the first diode, the second diode, and the alarm indicator all emit light, the detection result of the carbon fiber tube to be measured is an abnormal state;

[0030] When the first diode emits light, and the alarm indicator and the second diode do not emit light, or when the first diode and the second diode both emit light and the alarm indicator does not emit light, the detection result of the carbon fiber tube to be measured is a normal state.

[0031] A further technical solution is that the normal state includes a half - power normal state and a full - power normal state;

[0032] When the first diode emits light, and the alarm indicator and the second diode do not emit light, the detection result of the carbon fiber tube to be measured is a half - power normal state;

[0033] When the first diode and the second diode both emit light and the alarm indicator does not emit light, the detection result of the carbon fiber tube to be measured is a full - power normal state.

[0034] A further technical solution is to use a voltage - drop diode to control the working state of the thyristor, including:

[0035] When no load current passes through the voltage - drop diode, the voltage - drop diode does not generate a bias voltage, and the thyristor is in the cut - off state;

[0036] When load current passes through the voltage - drop diode, the voltage - drop diode generates a bias voltage to drive the thyristor to conduct.

[0037] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a carbon fiber lamp tube detection circuit including a three-position switch, a first diode, a second diode, an alarm indicator light, a thyristor, a carbon fiber lamp tube to be measured, and a voltage drop diode. By connecting the three-position switch to the first diode, the second diode, and the carbon fiber lamp tube to be measured, the lighting display conditions of the first diode, the second diode, and the alarm indicator light can be controlled by adjusting different positions on the three-position switch. Furthermore, different carbon fiber lamp tube detection results can be obtained based on different lighting display conditions. In this way, users can directly find the problematic carbon fiber lamp tubes through the lighting display conditions and replace them in a timely manner, improving the problem that the state of the filament in the carbon fiber lamp tube cannot be detected in time due to manual visual observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0039] Figure 1 is a schematic structural diagram of an embodiment of the carbon fiber lamp tube detection circuit provided by the present application;

[0040] Figure 2 is Figure 1 a schematic diagram of the first current flow direction in

[0041] Figure 3 is Figure 1 a schematic diagram of the second current flow direction in

[0042] Figure 4 is Figure 1 a schematic diagram of the third current flow direction in

[0043] Figure 5 is Figure 1 a schematic diagram of the fourth current flow direction in

[0044] Figure 6 is a schematic flowchart of the first embodiment of the carbon fiber lamp tube detection method provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. In addition, it should be noted that for the convenience of description, only the parts related to the present application rather than all the structures are shown in the drawings. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0046] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0047] Since the carbon fiber lamp tube has a heat preservation effect, users usually set carbon fiber lamp tubes in the piglet pen to help the weak piglets keep warm after birth and promote their healthy physical development.

[0048] During the use of the carbon fiber lamp tube, the filament is prone to break. Therefore, when users conduct daily pen inspections, they will deliberately open the heat preservation cover plate and visually observe the state of the filament in the carbon fiber lamp tube to determine whether the filament is broken. However, the carbon fiber lamp tube generates heat but does not emit light, and the illuminance is very low. Therefore, it is very difficult to find whether the carbon fiber lamp tube is in normal use through this manual visual observation method. If the filament breaks and is not replaced in time, the survival rate of piglets will decrease, thereby affecting the benefits.

[0049] Therefore, in order to solve the technical problem that the abnormal state of the carbon fiber lamp tube cannot be detected in time by manually visually observing the state of the filament in the carbon fiber lamp tube, the present application provides a carbon fiber lamp tube detection circuit 10 and a detection method including the carbon fiber lamp tube detection circuit 10. Please refer to the following embodiments for details.

[0050] Before introducing the carbon fiber lamp tube detection method provided by the present application, the carbon fiber lamp tube detection circuit 10 provided by the present application will be introduced first.

[0051] Refer to Figures 1 to 5 , Figure 1 which is a schematic structural diagram of an embodiment of the carbon fiber lamp tube detection circuit provided by the present application; Figure 2 is Figure 1 a schematic diagram of the first current flow direction in Figure 3 is Figure 1 a schematic diagram of the second current flow direction in Figure 4 is Figure 1Schematic diagram of the third current flow direction; Figure 5 is Figure 1 Schematic diagram of the fourth current flow direction in; wherein, the arrow direction in the figure indicates the current flow direction.

[0052] Such as Figure 1 As shown, the carbon fiber lamp tube detection circuit 10 provided by the present application includes: a live wire input terminal 100, a neutral wire input terminal 200, a three - position switch 300, a first diode 410, an alarm indicator lamp 500, a thyristor 600, a carbon fiber lamp tube to be measured 700, and a drive circuit 800.

[0053] Among them, the three - position switch 300 has a full - power position, a half - power position, and an off position. Among them, the positive pole of the three - position switch 300 can be connected to the live wire input terminal 100, and the negative pole can be connected to the positive pole of the first diode 410 and the carbon fiber lamp tube to be measured 700. The negative pole of the first diode 410 is connected to the alarm indicator lamp 500 and the thyristor 600; the alarm indicator lamp 500 is also connected to the neutral wire input terminal 200; the thyristor 600 is respectively connected to the negative pole of the first diode 410 and the drive circuit 800; the drive circuit 800 is connected to the output terminal of the carbon fiber lamp tube to be measured 700.

[0054] Among them, the three - position switch 300 is a single - phase rectifier diode, and the first diode 410 and the alarm indicator lamp 500 can be single - phase light - emitting diodes.

[0055] Such as Figure 2 As shown, specifically, when the three - position switch 300 is in the full - power position, at this time, both positive and negative currents exist in the circuit. The positive current passes through the first diode 410, making the first diode 410 emit light, and the circuit will provide full - power current to the carbon fiber lamp tube to be measured 700 to make it emit light normally. Since the drive circuit 800 is connected to the output terminal of the carbon fiber lamp tube to be measured 700, the carbon fiber lamp tube to be measured 700 provides load current for the drive circuit 800. After the drive circuit 800 has load current, it drives the thyristor 600 to conduct. Therefore, when the thyristor 600 is conducting, the current of the first diode 410 directly flows to the thyristor 600, making the alarm indicator lamp 500 short - circuited and not emitting light.

[0056] Such as Figure 3 As shown, when the carbon fiber lamp tube to be measured 700 fails, the carbon fiber lamp tube to be measured 700 cannot provide load current for the drive circuit 800. After the drive circuit 800 has no load current, it cannot drive the thyristor 600 to conduct. Therefore, when the thyristor 600 is not conducting, the current of the first diode 410 directly flows to the alarm indicator lamp 500, making the alarm indicator lamp 500 emit light to prompt the user.

[0057] Such as Figure 4As shown, when the three - position switch 300 is in the half - power position, only a forward current exists in the circuit at this time. The forward current passes through the first diode 410, causing the first diode 410 to emit light. However, in the half - power position, the current provided by the circuit is halved, causing the measured carbon fiber lamp tube 700 to emit light only at half power. At this time, the measured carbon fiber lamp tube 700 provides a half - power load current for the drive circuit 800. After the drive circuit 800 has the half - power load current, the drive thyristor 600 conducts. Therefore, when the thyristor 600 conducts, the current of the first diode 410 directly flows to the thyristor 600, causing the alarm indicator lamp 500 to be short - circuited and not emit light.

[0058] As Figure 5 shown, when the measured carbon fiber lamp tube 700 fails, the measured carbon fiber lamp tube 700 cannot provide a half - power load current for the drive circuit 800. After the drive circuit 800 does not have a half - power load current, it cannot drive the thyristor 600 to conduct. Therefore, when the thyristor 600 does not conduct, the current of the first diode 410 directly flows to the alarm indicator lamp 500, causing the alarm indicator lamp 500 to emit light to prompt the user.

[0059] When the three - position switch 300 is in the off position, the circuit does not supply current to the measured carbon fiber lamp tube 700 and the first diode 410. The measured carbon fiber lamp tube 700 is in the off state without receiving power supply and cannot provide a load current for the drive circuit 800. At this time, since there is no current in the first diode 410 either, no current flows to the alarm indicator lamp 500 or the thyristor 600. Therefore, neither the first diode 410 nor the alarm indicator lamp 500 emits light.

[0060] In this embodiment, a carbon fiber lamp tube detection circuit 10 is provided, which includes a three - position switch 300, a first diode 410, a second diode 420, an alarm indicator lamp 500, a thyristor 600, a measured carbon fiber lamp tube 700, and a voltage - drop diode 801. By connecting the three - position switch 300 to the first diode 410, the second diode 420, and the measured carbon fiber lamp tube 700, the light - emitting display conditions of the first diode 410, the second diode 420, and the alarm indicator lamp 500 can be controlled by adjusting different positions on the three - position switch 300. Furthermore, different carbon fiber lamp tube detection results can be obtained based on different light - emitting display conditions. In this way, users can intuitively find the problematic carbon fiber lamp tube through the light - emitting display conditions and replace it in time, improving the problem that the state of the filament in the carbon fiber lamp tube cannot be detected in time due to manual visual observation.

[0061] Refer to Figures 1 to 5, in some embodiments, the drive circuit 800 includes a voltage drop diode 801 and a first current limiting resistor 802; wherein, the thyristor 600 is respectively connected to the voltage drop diode 801 and the first current limiting resistor 802; the voltage drop diode 801 and the first current limiting resistor 802 are respectively connected to the carbon fiber tube 700 to be measured.

[0062] Wherein, when the carbon fiber tube 700 to be measured provides a load current for the drive circuit 800, the voltage drop diode 801 generates a bias voltage to drive the thyristor 600 to conduct because there is a load current passing through. Therefore, when the thyristor 600 is conducting, the current of the first diode 410 directly flows to the thyristor 600, causing the alarm indicator 500 to be short-circuited and not light up.

[0063] When the carbon fiber tube 700 to be measured fails, the carbon fiber tube 700 to be measured cannot provide a load current for the drive circuit 800. The voltage drop diode 801 has no load current passing through, and there is no bias voltage at the gate of the thyristor 600. Therefore, the thyristor 600 is driven to cut off and not conduct. When the thyristor 600 is not conducting, the current of the first diode 410 directly flows to the alarm indicator 500, causing the alarm indicator 500 to light up to prompt the user.

[0064] In some embodiments, the detection circuit 10 further includes a second current limiting resistor 900, wherein the second current limiting resistor 900 is connected between the alarm indicator 500 and the first diode 420. Since the second current limiting resistor 900 is provided between the first diode 410 and the alarm indicator 500, when the thyristor 600 is conducting, the current of the first diode 410 directly flows to the thyristor 600, causing the alarm indicator 500 to be short-circuited and not light up.

[0065] Refer to Figures 1 to 5 , in some embodiments, the carbon fiber tube detection circuit 10 further includes a second diode 420, wherein the positive electrode of the second diode 420 is connected to the neutral wire input terminal 200, and the negative electrode is connected to the three-position switch 300.

[0066] Wherein, the second diode 420 is a unidirectional light-emitting diode.

[0067] Since the diode has the property of unidirectional conduction, when it conducts, the current direction is from the anode (i.e., the positive electrode) through the tube to the cathode (i.e., the negative electrode). And the positive electrode of the second diode 420 is connected to the neutral wire input terminal 200, and the negative electrode is connected to the three-position switch 300. Therefore, as Figure 1As shown in the figure, when the three - stage switch 300 is in the full - power gear, there are both forward current and reverse current in the circuit at this time. Then the forward current passes through the first diode 410, making the first diode 410 emit light, and the reverse current passes through the second diode 420, making the second diode 420 emit light. Therefore, it can be judged that the carbon fiber lamp tube is in the normal - power lighting state according to the simultaneous lighting of the first diode 410 and the second diode 420; as Figure 4 shown in the figure, when the three - stage switch 300 is in the half - power gear, there is only forward current in the circuit at this time. Then the forward current passes through the first diode 410, making the first diode 410 emit light, and there is no reverse current passing through the second diode 420, so the second diode 420 does not emit light. Therefore, it can be judged that the carbon fiber lamp tube is in the low - power (i.e., half - power) lighting state according to only the first diode 410 emitting light.

[0068] Combined with the carbon fiber lamp tube detection circuit 10 mentioned in the above - mentioned embodiments, the carbon fiber lamp tube detection method provided by the present application will be introduced in detail below. Specifically, please refer to Figure 6 , Figure 6 is a schematic flowchart of the first embodiment of the carbon fiber lamp tube detection method provided by the present application. The method includes:

[0069] Step 110: Control the working state of the thyristor 600 by using the voltage - drop diode 801.

[0070] For example, when there is no load current passing through the voltage - drop diode 801, the voltage - drop diode 801 does not generate a bias voltage, and the thyristor 600 is in the cut - off state; when there is load current passing through the voltage - drop diode 801, the voltage - drop diode 801 generates a bias voltage to drive the thyristor 600 to conduct.

[0071] Step 120: Based on the gear of the three - stage switch 300 and the working state of the thyristor 600, obtain the lighting conditions of the first diode 410, the second diode 420, and the alarm indicator lamp 500.

[0072] Among them, the gears of the three - stage switch 300 include the full - power gear, the half - power gear, and the off gear, and the working states of the thyristor 600 include the conduction state and the cut - off state.

[0073] Among them, the first diode 410, the second diode 420, and the alarm indicator lamp 500 can be of different colors. For example, the first diode 410 is green, the second diode 420 is blue, and the alarm indicator lamp 500 is red, etc. The specific colors can be selected according to the actual situation, and the present application does not limit this here.

[0074] Based on the gear position of the three - position switch 300 and the operating state of the thyristor 600, the lighting conditions of the first diode 410, the second diode 420, and the alarm indicator light 500 can specifically include the following situations:

[0075] 1) When the three - position switch 300 is in the full - power gear position and the thyristor 600 is in the conducting state, the first diode 410 and the second diode 420 emit light, and the alarm indicator light 500 does not emit light.

[0076] 2) When the three - position switch 300 is in the full - power gear position and the thyristor 600 is in the cut - off state, the first diode 410, the second diode 420, and the alarm indicator light 500 all emit light.

[0077] 3) When the three - position switch 300 is in the half - power gear position and the thyristor 600 is in the conducting state, the first diode 410 emits light, and the second diode 420 and the alarm indicator light 500 do not emit light.

[0078] 4) When the three - position switch 300 is in the half - power gear position and the thyristor 600 is in the cut - off state, the first diode 410 and the alarm indicator light 500 emit light, and the second diode 420 does not emit light.

[0079] 5) When the three - position switch 300 is in the off gear position, the first diode 410, the second diode 420, and the alarm indicator light 500 do not emit light.

[0080] Step 130: Based on the lighting conditions of the first diode 410, the second diode 420, and the alarm indicator light 500, obtain the detection result of the carbon fiber tube 700 to be measured.

[0081] Among them, the detection result of the carbon fiber tube 700 to be measured includes the normal state and the abnormal state. Exemplarily, step 130 can specifically include:

[0082] 1) When both the first diode 410 and the alarm indicator light 500 emit light, the detection result of the carbon fiber tube 700 to be measured is the abnormal state.

[0083] 2) When the first diode 410, the second diode 420, and the alarm indicator light 500 all emit light, the detection result of the carbon fiber tube 700 to be measured is the abnormal state.

[0084] 3) When the first diode 410 emits light, and the alarm indicator light 500 and the second diode 420 do not emit light, the detection result of the carbon fiber tube 700 to be measured is the normal state.

[0085] 4) When the first diode 410 and the second diode 420 both emit light, and the alarm indicator light 500 does not emit light, the detection result of the carbon fiber tube 700 to be measured is the normal state.

[0086] Among them, the normal states include the half-power normal state and the full-power normal state. For example, when the first diode 410 emits light and the alarm indicator 500 and the second diode 420 do not emit light, the detection result of the carbon fiber tube 700 to be measured is the half-power normal state; when both the first diode 410 and the second diode 420 emit light and the alarm indicator 500 does not emit light, the detection result of the carbon fiber tube 700 to be measured is the full-power normal state.

[0087] In several implementation manners provided by the present application, it should be understood that the disclosed method and device can be implemented in other manners. For example, the device implementation manner described above is only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division manners. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0088] The unit described as a separated component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this implementation manner.

[0089] In addition, each functional unit in various implementation manners of the present application can be integrated in a processing unit, or each unit exists physically alone, or two or more units are integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0090] If the integrated unit in the above-mentioned other implementation manners is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that makes a contribution to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods in various implementation manners of the present application. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0091] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A carbon fiber lamp tube detection circuit, characterized in that, the detection circuit includes: a live wire input terminal, a neutral wire input terminal, a three - position switch, a first diode, an alarm indicator light, a thyristor, a carbon fiber lamp tube to be measured, and a drive circuit; wherein, the three - position switch is connected to the live wire input terminal, the positive electrode of the first diode, and the carbon fiber lamp tube to be measured; the negative electrode of the first diode is connected to the alarm indicator light and the thyristor; the alarm indicator light is also connected to the neutral wire input terminal; the thyristor is respectively connected to the negative electrode of the first diode and the drive circuit; the drive circuit is connected to the output terminal of the carbon fiber lamp tube to be measured.

2. The detection circuit according to claim 1, characterized in that, the drive circuit includes a voltage - drop diode and a first current - limiting resistor; wherein, the thyristor is respectively connected to the voltage - drop diode and the first current - limiting resistor; the voltage - drop diode and the first current - limiting resistor are respectively connected to the carbon fiber lamp tube to be measured.

3. The detection circuit according to claim 2, characterized in that, the carbon fiber lamp tube detection circuit further includes a second diode, wherein, the positive electrode of the second diode is connected to the neutral wire input terminal, and the negative electrode is connected to the three - position switch.

4. The detection circuit according to claim 3, characterized in that, the three - position switch is a single - phase rectifier diode, and the first diode and the second diode are single - phase light - emitting diodes.

5. The method according to any one of claims 1 - 4, characterized in that, the detection circuit further includes a second current - limiting resistor, wherein, the second current - limiting resistor is connected between the alarm indicator light and the first diode.

6. A carbon fiber lamp tube detection method, characterized in that, the carbon fiber lamp tube detection circuit includes a three - position switch, a first diode, a second diode, an alarm indicator light, a thyristor, a carbon fiber lamp tube to be measured, and a voltage - drop diode, wherein, the three - position switch is connected to the first diode, the second diode, and the carbon fiber lamp tube to be measured, the thyristor is respectively connected to the first diode and the voltage - drop diode, and the voltage - drop diode is also connected to the carbon fiber lamp tube to be measured; the method includes: using the voltage - drop diode to control the working state of the thyristor; based on the position of the three - position switch and the working state of the thyristor, obtaining the lighting conditions of the first diode, the second diode, and the alarm indicator light; based on the lighting conditions of the first diode, the second diode, and the alarm indicator light, obtaining the detection result of the carbon fiber lamp tube to be measured.

7. The method according to claim 6, characterized in that, the positions of the three - position switch include a full - power position and a half - power position, and the working states of the thyristor include a conduction state and a cut - off state; the obtaining the lighting conditions of the first diode, the second diode, and the alarm indicator light based on the position of the three - position switch and the working state of the thyristor includes: when the three - position switch is in the full - power position and the thyristor is in the conduction state, then the first diode and the second diode emit light, and the alarm indicator light does not emit light; When the three - gear switch is in the full - power gear and the thyristor is in the cut - off state, the first diode, the second diode, and the alarm indicator light all emit light; When the three - gear switch is in the half - power gear and the thyristor is in the conducting state, the first diode emits light, and the second diode and the alarm indicator light do not emit light; When the three - gear switch is in the half - power gear and the thyristor is in the cut - off state, the first diode and the alarm indicator light emit light, and the second diode does not emit light.

8. The method according to claim 6, wherein, the detection result of the carbon fiber tube to be measured includes a normal state and an abnormal state, and obtaining the detection result of the carbon fiber tube to be measured based on the light - emitting conditions of the first diode, the second diode, and the alarm indicator light includes: when both the first diode and the alarm indicator light emit light, or when the first diode, the second diode, and the alarm indicator light all emit light, the detection result of the carbon fiber tube to be measured is an abnormal state; when the first diode emits light, the alarm indicator light and the second diode do not emit light, or when the first diode and the second diode both emit light and the alarm indicator light does not emit light, the detection result of the carbon fiber tube to be measured is a normal state.

9. The method according to claim 8, wherein, the normal state includes a half - power normal state and a full - power normal state; when the first diode emits light, the alarm indicator light and the second diode do not emit light, the detection result of the carbon fiber tube to be measured is a half - power normal state; when the first diode and the second diode both emit light and the alarm indicator light does not emit light, the detection result of the carbon fiber tube to be measured is a full - power normal state.

10. The method according to claim 6, wherein, controlling the working state of the thyristor by using the voltage - drop diode includes: when no load current passes through the voltage - drop diode, the voltage - drop diode does not generate a bias voltage, and the thyristor is in the cut - off state; when a load current passes through the voltage - drop diode, the voltage - drop diode generates a bias voltage to drive the thyristor to conduct.

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