CN214954008U - Electric leakage alarm circuit and electric leakage alarm device - Google Patents
Electric leakage alarm circuit and electric leakage alarm device Download PDFInfo
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- CN214954008U CN214954008U CN202022714324.5U CN202022714324U CN214954008U CN 214954008 U CN214954008 U CN 214954008U CN 202022714324 U CN202022714324 U CN 202022714324U CN 214954008 U CN214954008 U CN 214954008U
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- 239000000523 sample Substances 0.000 claims abstract description 36
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 3
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Abstract
The application provides an electric leakage alarm circuit and an electric leakage alarm device. The leakage alarm circuit comprises a leakage signal amplifying circuit and an alarm circuit; the leakage signal amplifying circuit comprises a probe and an amplifying triode, an emitting electrode of the amplifying triode is connected with the alarm circuit, and the leakage voltage output by the leakage equipment is greater than or equal to 36V; the alarm circuit comprises an alarm and an alarm triode, and the emitter of the amplifying triode is connected with the base of the alarm triode. The signal of telecommunication of access is enlargied step by step through the electric current of enlargiing triode and alarm triode for the electric current increase of the collecting electrode of alarm triode, thereby make the siren of being connected with the collecting electrode of alarm triode open, realize the warning to the leakage voltage who is greater than human safe voltage, moreover, leakage alarm circuit's electronic components's is small in quantity, makes leakage alarm circuit's simple structure, the installation of being convenient for, thereby makes leakage alarm circuit's cost of manufacture reduce.
Description
Technical Field
The utility model relates to an electric leakage alarm technical field especially relates to an electric leakage alarm circuit and electric leakage alarm device.
Background
With the development of electronic technology, various electronic products are filling the daily life and work and study of people, thereby bringing great convenience and improving the production efficiency of the whole society. The safety of electronic products is an extremely important link, and once most of electronic products are in contact with human bodies, once the electronic products leak electricity, the leakage voltage is greater than the safety voltage (36V) of the human bodies, and the human bodies are injured. In order to warn the condition that the electric leakage exceeds the voltage of the human body in time, a device with an electric leakage alarm function is used for monitoring.
However, the leakage alarm circuit in the conventional leakage alarm device has a complex structure, and even has a large component similar to a transformer in the same volume, so that the conventional leakage alarm device has an excessively large volume, the production and manufacturing costs of the conventional leakage alarm device are increased, and the conventional leakage alarm device is not convenient to carry and install.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point among the prior art, providing a simple structure and reduction in production cost's electric leakage warning circuit and electric leakage alarm device.
The purpose of the utility model is realized through the following technical scheme:
an electrical leakage alarm circuit comprising: a leakage signal amplifying circuit and an alarm circuit; the leakage signal amplifying circuit comprises a probe and an amplifying triode, wherein the first end of the probe is used for being connected with leakage equipment, the second end of the probe is connected with the base electrode of the amplifying triode, the collector electrode of the amplifying triode is used for being connected with an external power supply, and the emitter electrode of the amplifying triode is connected with the alarm circuit, wherein the leakage voltage output by the leakage equipment is greater than or equal to 36V; the alarm circuit comprises an alarm and an alarm triode, wherein the first end of the alarm is used for being connected with the external power supply, the second end of the alarm is connected with the collector of the alarm triode, the emitter of the amplification triode is connected with the base of the alarm triode, and the emitter of the alarm triode is grounded.
In one embodiment, the amplifying transistor includes a first amplifying transistor and a second amplifying transistor, a collector of the first amplifying transistor and a collector of the second amplifying transistor are both used for being connected to the external power supply, the second end of the probe is connected to a base of the first amplifying transistor, an emitter of the first amplifying transistor is connected to a base of the second amplifying transistor, and an emitter of the second amplifying transistor is connected to a base of the alarm transistor.
In one embodiment, the leakage signal amplifying circuit further includes a filter capacitor, and the second end of the probe is grounded through the filter capacitor.
In one embodiment, the probe includes one of a wire contact and an induction coil.
In one embodiment, the alarm comprises at least one of a warning light, a voice-activated alarm, and a buzzer.
An electric leakage alarm device comprises the electric leakage alarm circuit in any embodiment.
Compared with the prior art, the utility model discloses at least, following advantage has:
monitoring leakage equipment through the probe, make the signal of telecommunication of inserting amplify step by step with the electric current of alarm triode through the current of amplifying triode, make the electric current increase of the collecting electrode of alarm triode, thereby make the siren of being connected with the collecting electrode of alarm triode open, realize the warning to the leakage voltage who is greater than human safe voltage, moreover, leakage alarm circuit's electronic components's is small in quantity, make leakage alarm circuit's simple structure, be convenient for install, thereby make leakage alarm circuit's cost of manufacture reduce.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a circuit diagram of an embodiment of a leakage alarm circuit.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to an electric leakage alarm circuit. In one embodiment, the leakage alarm circuit comprises a leakage signal amplifying circuit and an alarm circuit. The leakage signal amplifying circuit comprises a probe and an amplifying triode. The first end of the probe is used for being connected with the electric leakage equipment, and the second end of the probe is connected with the base electrode of the amplifying triode. And the collector of the amplifying triode is used for being connected with an external power supply, and the emitter of the amplifying triode is connected with the alarm circuit. Wherein, the leakage voltage output by the leakage equipment is greater than or equal to 36V. The alarm circuit comprises an alarm and an alarm triode, wherein the first end of the alarm is used for being connected with the external power supply, the second end of the alarm is connected with the collector of the alarm triode, the emitter of the amplification triode is connected with the base of the alarm triode, and the emitter of the alarm triode is grounded. Carry out the voltage drop with leakage voltage through the probe, make the leakage current of inserting leakage signal amplifier circuit less, be applicable to circuit simple structure's electric leakage warning circuit, and enlarge step by step with the electric current of alarm triode through the current of amplifying triode, make the current increase of the collecting electrode of alarm triode, thereby make the siren of being connected with the collecting electrode of alarm triode open, realize the warning to the leakage voltage who is greater than human safe voltage, and, electric leakage warning circuit's electronic components's is few, make electric leakage warning circuit's simple structure, thereby make electric leakage warning circuit's cost of manufacture reduce.
Please refer to fig. 1, which is a circuit diagram of an electric leakage alarm circuit according to an embodiment of the present invention.
The leakage alarm circuit 10 of an embodiment includes a leakage signal amplifying circuit 100 and an alarm circuit 200. The leakage signal amplifying circuit 100 includes a probe T1 and an amplifying transistor Q1. The first end of the probe T1 is used for being connected with a leakage device, and the second end of the probe T1 is connected with the base electrode of the amplifying triode Q1. The collector of the amplifying transistor Q1 is used for connecting with the external power supply VDD, and the emitter of the amplifying transistor Q1 is connected with the alarm circuit 200. Wherein, the leakage voltage output by the leakage equipment is greater than or equal to 36V. The alarm circuit 200 comprises an alarm HL and an alarm transistor Q2, wherein a first end of the alarm HL is used for being connected with the external power supply VDD, a second end of the alarm HL is connected with a collector of the alarm transistor Q2, an emitter of the amplifying transistor Q1 is connected with a base of the alarm transistor Q2, and an emitter of the alarm transistor Q2 is grounded.
In this embodiment, monitor electric leakage equipment through the probe, make the electric signal of inserting amplify step by step through the electric current of amplifying triode and alarm triode, make the current increase of the collecting electrode of alarm triode, thereby make the siren of being connected with the collecting electrode of alarm triode open, the realization is to the warning of the leakage voltage who is greater than human safe voltage, and, electric leakage alarm circuit's electronic components's is small in quantity, make electric leakage alarm circuit's simple structure, the installation of being convenient for, thereby make electric leakage alarm circuit's cost of manufacture reduce.
In one embodiment, referring to fig. 1, the amplifying transistor Q1 includes a first amplifying transistor Q1a and a second amplifying transistor Q1b, a collector of the first amplifying transistor Q1a and a collector of the second amplifying transistor Q1b are both configured to be connected to the external power supply VDD, a second end of the probe T1 is connected to a base of the first amplifying transistor Q1a, an emitter of the first amplifying transistor Q1a is connected to a base of the second amplifying transistor Q1b, and an emitter of the second amplifying transistor Q1b is connected to a base of the alarm transistor Q2. In this embodiment, the first amplifying transistor Q1a and the second amplifying transistor Q1b are cascaded, the current output by the emitter of the first amplifying transistor Q1a is led to the base of the second amplifying transistor Q1b, and after the probe T1 steps down the external leakage voltage, the leakage current is reduced, so that the leakage current warning circuit is suitable for the simple leakage warning circuit 200, and the possibility that the leakage warning circuit 200 is burned out due to the excessive current is reduced. After the two-stage current amplification of the first amplifying triode Q1a and the second amplifying triode Q1b, the current of the emitter of the second amplifying triode Q1b is greater than the base current of the first amplifying triode Q1a, that is, the current of the emitter of the second amplifying triode Q1b is greater than the leakage current, so that the originally weak leakage current is amplified, thereby ensuring the protection of the amplifying triode Q1 and the alarm triode Q2 during the monitoring of the leakage current, that is, reducing the burning-out probability of the amplifying triode Q1 and the alarm triode Q2. In this way, under the action of the multistage current amplification of the first amplifying transistor Q1a and the second amplifying transistor Q1b, the current output by the amplifying transistor Q1 to the base of the alarm transistor Q2 increases, so that the current of the collector of the alarm transistor Q2 increases to provide the operating current for turning on the alarm HL. In other embodiments, by adjusting the impedance of the probe T1 and the amplification factor of each triode, when the leakage voltage connected to the leakage alarm circuit is greater than the safety voltage of 36V, the current of the base of the alarm triode Q2 is increased to the starting current of the alarm HL, so as to alarm the leakage voltage greater than the safety voltage of a human body in time. Furthermore, the amplification of the first amplifying transistor Q1a and the second amplifying transistor Q1b may be adjusted or increased according to the actual current requirement.
In one embodiment, referring to fig. 1, the leakage signal amplifying circuit 100 further includes a filter capacitor C1, and the second terminal of the probe T1 is grounded through the filter capacitor C1. In this embodiment, when the external leakage current is a high-frequency ac current, the output of the alarm HL is likely to be unstable, for example, when the alarm HL is an audio alarm device, the frequency of the output sound signal is too high, so that the alarm HL outputs an extremely sharp alarm sound, and the eardrum is likely to be damaged. In order to stabilize the alarm signal output by the alarm, the filter capacitor C1 performs high-frequency filtering processing on the current accessed to the amplifying triode Q1, so that the high-frequency signal in the leakage current is filtered, which is beneficial to improving the stability of the low-frequency signal, for example, improving the quality of the bass signal output by the alarm HL, and improving the stability of the alarm signal output by the alarm.
In one embodiment, the probe includes one of a wire contact and an induction coil. In this embodiment, the probe is equivalent to an inductance, the probe has the ability of keeping apart alternating current signal, makes the electric current of base input of enlarging the triode is stable direct current to make the operating point of each triode stable, be convenient for carry out stable the enlarging to leakage current, ensure the stable direct current of collecting electrode output of alarm triode is applicable to simple structure's direct current alarm, for example, the alarm is the warning light, makes the warning light send stable warning light, and not the light of scintillation, plays the effect of continuous warning, has prolonged alarm time. Moreover, the probe is a wire contact, and the probe is contacted with the leakage equipment, so that the leakage signal is conveniently led in.
In one embodiment, the alarm comprises at least one of a warning light, a voice-activated alarm, and a buzzer. In this embodiment, the alarm does warning light, voice prompt alarm and bee calling organ connects in parallel, promptly the warning light the positive pole and bee calling organ's positive pole all is used for being connected with external power supply VDD, the warning light the negative pole and bee calling organ's negative pole all with warning triode collecting electrode connects. Thus, when the leakage voltage is greater than the safe voltage of 36V, the amplifying triode and the alarm triode amplify the leakage current for multiple times, so that the leakage current flows through the warning lamp and the buzzer, the current of the warning lamp and the buzzer is increased, at least one of the warning lamp and the buzzer is opened, and the leakage alarm circuit sends out an alarm signal in time. In one embodiment, the warning light is a light emitting diode. In other embodiments, the voice prompt alarm is an alarm with a voice prompt module, and is convenient for alarming in a voice mode with higher recognition degree, so that the condition of electric leakage can be found in time.
In the above embodiments, the types of the first amplifying transistor Q1a, the second amplifying transistor Q1b and the alarm transistor Q2 are not limited, and may be the same or different. The amplification factors of the first amplifying triode Q1a, the second amplifying triode Q1b and the alarm triode Q2 are adjusted according to actual requirements, and only when the leakage voltage contacted by the probe T1 is larger than or equal to 36V, the current of the collector of the alarm triode Q2 is larger than or equal to the working current of the alarm HL.
The application also provides an electric leakage alarm device, which comprises the electric leakage alarm circuit in any embodiment. In this embodiment, the leakage alarm circuit includes a leakage signal amplifying circuit and an alarm circuit. The leakage signal amplifying circuit comprises a probe and an amplifying triode. The first end of the probe is used for being connected with the electric leakage equipment, and the second end of the probe is connected with the base electrode of the amplifying triode. And the collector of the amplifying triode is used for being connected with an external power supply, and the emitter of the amplifying triode is connected with the alarm circuit. Wherein, the leakage voltage output by the leakage equipment is greater than or equal to 36V. The alarm circuit comprises an alarm and an alarm triode, wherein the first end of the alarm is used for being connected with the external power supply, the second end of the alarm is connected with the collector of the alarm triode, the emitter of the amplification triode is connected with the base of the alarm triode, and the emitter of the alarm triode is grounded. Monitoring leakage equipment through the probe, make the signal of telecommunication of inserting amplify step by step with the electric current of alarm triode through the current of amplifying triode, make the electric current increase of the collecting electrode of alarm triode, thereby make the siren of being connected with the collecting electrode of alarm triode open, realize the warning to the leakage voltage who is greater than human safe voltage, moreover, leakage alarm circuit's electronic components's is small in quantity, make leakage alarm circuit's simple structure, be convenient for install, thereby make leakage alarm circuit's cost of manufacture reduce.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. An electric leakage alarm circuit, comprising: a leakage signal amplifying circuit and an alarm circuit;
the leakage signal amplifying circuit comprises a probe and an amplifying triode, wherein the first end of the probe is used for being connected with leakage equipment, the second end of the probe is connected with the base electrode of the amplifying triode, the collector electrode of the amplifying triode is used for being connected with an external power supply, and the emitter electrode of the amplifying triode is connected with the alarm circuit, wherein the leakage voltage output by the leakage equipment is greater than or equal to 36V;
the alarm circuit comprises an alarm and an alarm triode, wherein the first end of the alarm is used for being connected with the external power supply, the second end of the alarm is connected with the collector of the alarm triode, the emitter of the amplification triode is connected with the base of the alarm triode, and the emitter of the alarm triode is grounded;
the alarm comprises a warning lamp, a voice prompt alarm and a buzzer, the warning lamp is connected with the voice prompt alarm and the buzzer in parallel, the anode of the warning lamp is connected with an external power supply, and the cathode of the warning lamp is connected with the collector of the alarm triode.
2. The leakage alarm circuit of claim 1, wherein the amplifying transistor comprises a first amplifying transistor and a second amplifying transistor, a collector of the first amplifying transistor and a collector of the second amplifying transistor are both configured to be connected to the external power supply, the second end of the probe is connected to a base of the first amplifying transistor, an emitter of the first amplifying transistor is connected to a base of the second amplifying transistor, and an emitter of the second amplifying transistor is connected to a base of the alarm transistor.
3. The electrical leakage alarm circuit of claim 1, wherein the electrical leakage signal amplification circuit further comprises a filter capacitor, and wherein the second end of the probe is grounded through the filter capacitor.
4. The electrical leakage alarm circuit of claim 1, wherein the probe comprises one of a wire contact and an induction coil.
5. An electric leakage alarm device comprising the electric leakage alarm circuit according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022714324.5U CN214954008U (en) | 2020-11-20 | 2020-11-20 | Electric leakage alarm circuit and electric leakage alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022714324.5U CN214954008U (en) | 2020-11-20 | 2020-11-20 | Electric leakage alarm circuit and electric leakage alarm device |
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| Publication Number | Publication Date |
|---|---|
| CN214954008U true CN214954008U (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022714324.5U Expired - Fee Related CN214954008U (en) | 2020-11-20 | 2020-11-20 | Electric leakage alarm circuit and electric leakage alarm device |
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| Country | Link |
|---|---|
| CN (1) | CN214954008U (en) |
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- 2020-11-20 CN CN202022714324.5U patent/CN214954008U/en not_active Expired - Fee Related
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Granted publication date: 20211130 |