CN212137276U - Alarm system supply circuit short circuit overheat alarm device - Google Patents
Alarm system supply circuit short circuit overheat alarm device Download PDFInfo
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- CN212137276U CN212137276U CN202020895463.XU CN202020895463U CN212137276U CN 212137276 U CN212137276 U CN 212137276U CN 202020895463 U CN202020895463 U CN 202020895463U CN 212137276 U CN212137276 U CN 212137276U
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- 230000005611 electricity Effects 0.000 claims abstract 8
- 238000013021 overheating Methods 0.000 claims description 6
- 230000035772 mutation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model discloses an alarm system supply circuit short circuit overheat alarm device, relate to security protection and control technical field, the utility model discloses an equipment main body is provided with anodal incoming port, negative pole incoming port, anodal delivery outlet, negative pole delivery outlet in the equipment main body, current sensor's current input utmost point is connected with anodal incoming port electricity, current sensor's current discrepancy utmost point is connected with relay one and relay two electricity, relay one is connected with anodal delivery outlet electricity, current sensor's digital signal output utmost point is connected with the IO interface electricity of singlechip, relay two is connected with anodal delivery outlet electricity, it has load resistance three to establish ties between relay two and the anodal delivery outlet, still be connected with the alarm indicator lamp on the IO interface of singlechip, relay one is normally closed contact relay, relay two is normally open contact relay; the utility model discloses can reduce load current under the condition that can not cut off power immediately, ensure the safety of power.
Description
Technical Field
The utility model relates to a security protection and control technical field, more specifically relate to an overheated alarm equipment of alarm system supply circuit short circuit.
Background
The short-circuit fault is a fault which often occurs when the electrical equipment operates, and also an electrical fault which often occurs in production and life, and in order to minimize the occurrence of the short-circuit fault, the short-circuit protection equipment is usually arranged when the electrical equipment operates.
In operation, the electrical power system passes current when an abnormal connection (i.e., a short circuit) occurs between a phase and a phase or between a phase and ground (or neutral). The value may be much greater than the rated current and depends on the electrical distance of the short circuit point from the power supply. For example, when a short circuit occurs at the generator end, the maximum instantaneous value of the short-circuit current flowing through the generator can reach 10-15 times of the rated current. In a large-capacity power system, the short-circuit current can reach tens of thousands of amperes. This can have serious consequences for the proper operation of the power system.
The traditional short-circuit protection circuit utilizes a transistor to sample output voltage, and whether the short circuit occurs is judged according to the state change of the output voltage before and after the short circuit, so that the short-circuit protection circuit and the working principle circuit are realized.
The traditional short-circuit protection circuit can accurately monitor the function of whether the circuit is short-circuited or not and accurately cut off the power supply, but under many occasions, the short circuit of the electric appliance is a local short circuit, other circuits can normally work, the power supply cannot be cut off immediately, the power supply cut off can bring direct economic loss equipment, and the normal work of the electric appliance is ensured under the condition of not cutting off the power supply.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: for the technical problem who solves current short-circuit protection circuit and can not guarantee to use electrical apparatus's normal work under the condition of not cutting off power, the utility model provides an alarm system supply circuit short circuit overheat alarm equipment.
The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:
a short-circuit overheating alarm device of a power supply circuit of an alarm system comprises a device main body, wherein a positive electrode access port, a negative electrode access port, a positive electrode output port, a negative electrode output port and a short-circuit alarm circuit are arranged on the device main body, the negative electrode access port is connected with the negative electrode output port through a lead, the positive electrode access port is connected with the positive electrode output port through the short-circuit alarm circuit, the short-circuit alarm circuit comprises a current sensor, a single chip microcomputer, a first relay controlled by the single chip microcomputer, a second relay controlled by the single chip microcomputer and a third load resistor, a current input electrode of the current sensor is electrically connected with the positive electrode access port, a current input electrode of the current sensor is electrically connected with the first relay and the second relay, the first relay is electrically connected with the positive electrode output port, a digital signal output electrode of the current sensor is electrically connected, and a third load resistor is connected in series between the second relay and the positive output port, an alarm indicator lamp is further connected to an I/O interface of the single chip microcomputer, the first relay is a normally closed contact relay, and the second relay is a normally open contact relay.
The working principle is as follows: the electrode access port and the cathode access port of the device are respectively communicated with the anode and the cathode of a direct current power supply, when the anode of the electric appliance (the alarm system power supply circuit) is electrically connected with the anode output port, the cathode of the electric appliance is electrically connected with the cathode output port, when the power supply circuit of the alarm system is short-circuited, the current sensor transmits a current mutation signal to the singlechip when detecting that the current is increased sharply, the singlechip executes instructions according to the mutation signals, controls the second relay and the first relay coil to be electrified, enables the second relay to be a normally open contact relay, and a circuit is changed into a passage after the second relay is switched on, the relay I is a normally closed contact relay, the circuit is open circuit after being electrified, because the relay II is connected with the load resistor III in series, the current of the alarm system cannot burn out the power supply due to the short circuit of the power supply circuit of the alarm system or the power supply is forcibly cut off to influence the use of other electrical appliances; simultaneously because still be connected with alarm indicator on the singlechip, in case the singlechip is with according to the sudden change signal, alarm indicator is lighted, and the staff can see alarm indicator and just can discover the short circuit after being lighted to handle immediately, consequently this patent technique has not only solved the problem of traditional short circuit warning, has still reduced load current under the condition that can not cut off the power immediately simultaneously, ensures the safety of power.
Further, the current sensor is a hall current sensor.
Further, the singlechip is an AT89C2051 singlechip.
Furthermore, a first triode is connected to one I/O interface of the single chip microcomputer, the base of the first triode is electrically connected with the I/O interface of the single chip microcomputer, a first resistor is connected in series between the base of the first triode and the I/O interface of the single chip microcomputer, the emitting electrode of the first triode is electrically connected with a first relay, a green indicator light is electrically connected to the collecting electrode of the first triode, a second triode is connected to the other I/O interface of the single chip microcomputer, the base of the second triode is electrically connected with the I/O interface of the single chip microcomputer, a second resistor is connected in series between the base of the second triode and the I/O interface of the single chip microcomputer, and a red indicator light is electrically connected.
Further, the load resistor three is a variable resistor.
The utility model has the advantages as follows:
1. when the alarm system power supply circuit is short-circuited, the current sensor transmits a current mutation signal to the single chip microcomputer when detecting that the current is increased sharply, the single chip microcomputer executes an instruction according to the mutation signal, the relay II and the relay I coil are controlled to be electrified, the relay II is a normally open contact relay, the circuit is changed into a path after being switched on, the relay I is a normally closed contact relay, the circuit is in a circuit break after being electrified, and the current cannot burn out a power supply or the power supply is forcibly cut off to influence the use of other electrical appliances due to the short circuit of the alarm system power supply circuit because the relay II is connected with the load resistor III in series.
2. Because still be connected with alarm indicator on the singlechip, in case the singlechip is with according to sudden change signal, alarm indicator is lighted, and the staff can see alarm indicator and just can discover the short circuit after being lighted to handle immediately, consequently this patent technique has not only solved the problem of traditional short circuit warning, has still reduced load current under the condition that can not cut off the power immediately simultaneously, ensures the safety of power.
Drawings
Fig. 1 is a first schematic structural diagram of the present invention;
fig. 2 is a first schematic structural diagram of the present invention.
Reference numerals: 1-positive pole access port, 2-current sensor, 3-negative pole access port, 4-single chip microcomputer, 5-negative pole output port, 6-equipment main body, 7-positive pole output port, 8-load resistor III, 9-relay II, 10-relay I.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a short-circuit overheat alarm device for a power supply circuit of an alarm system, which includes a device main body 6, the device main body 6 is provided with a positive electrode inlet 1, a negative electrode inlet 3, a positive electrode outlet 7, a negative electrode outlet 5, and a short-circuit alarm circuit, the negative electrode inlet 3 is connected to the negative electrode outlet 5 through a wire, the positive electrode inlet 1 is connected to the positive electrode outlet 7 through the short-circuit alarm circuit, the short-circuit alarm circuit includes a current sensor 2, a single chip microcomputer 4, a relay one 10 controlled by the single chip microcomputer 4, a relay two 9 controlled by the single chip microcomputer 4, and a load resistor three 8, a current input electrode of the current sensor 2 is electrically connected to the positive electrode inlet 1, a current input electrode of the current sensor 2 is electrically connected to the relay one 10 and the relay two 9, the relay one 10 is electrically connected to the positive electrode outlet 7, and a digital signal output electrode of the, the second relay 9 is electrically connected with the positive output port 7, a third load resistor 8 is connected between the second relay 9 and the positive output port 7 in series, an alarm indicator lamp is further connected to an I/O interface of the single chip microcomputer 4, the first relay 10 is a normally closed contact relay, and the second relay 9 is a normally open contact relay.
The current sensor 2 is a Hall current sensor, the singlechip 4 is an AT89C2051 singlechip, and the load resistor III 8 is a variable resistor.
One of the I/O interfaces of the single chip microcomputer 4 is connected with a first triode, the base of the first triode is electrically connected with the I/O interface of the single chip microcomputer 4, a first resistor is connected between the base of the first triode and the I/O interface of the single chip microcomputer 4 in series, the emitting electrode of the first triode is electrically connected with a first relay 10, the collecting electrode of the first triode is electrically connected with a green indicator light, the other I/O interface of the single chip microcomputer 4 is connected with a second triode, the base of the second triode is electrically connected with the I/O interface of the single chip microcomputer 4, a second resistor is connected between the base of the second triode and the I/O interface of the single chip microcomputer 4 in series, and the collecting electrode.
Example 2
As shown in fig. 2, the present embodiment provides a short-circuit overheat alarm device for a power supply circuit of an alarm system, which includes a device main body 6, the device main body 6 is provided with a positive electrode inlet 1, a negative electrode inlet 3, a positive electrode outlet 7, a negative electrode outlet 5, and a short-circuit alarm circuit, the negative electrode inlet 3 is connected to the negative electrode outlet 5 through a wire, the positive electrode inlet 1 is connected to the positive electrode outlet 7 through the short-circuit alarm circuit, the short-circuit alarm circuit includes a current sensor 2, a single chip microcomputer 4, a relay one 10 controlled by the single chip microcomputer 4, a relay two 9 controlled by the single chip microcomputer 4, and a load resistor three 8, a current input electrode of the current sensor 2 is electrically connected to the positive electrode inlet 1, a current input electrode of the current sensor 2 is electrically connected to the relay one 10 and the relay two 9, the relay one 10 is electrically connected to the positive electrode outlet 7, and a digital signal output electrode of the, the second relay 9 is electrically connected with the positive output port 7, a third load resistor 8 is connected between the second relay 9 and the positive output port 7 in series, an alarm indicator lamp is further connected to an I/O interface of the single chip microcomputer 4, the first relay 10 is a normally closed contact relay, and the second relay 9 is a normally open contact relay. The first relay 10 and the second relay 9 are electrically connected with the same I/O interface of the singlechip 4.
The current sensor 2 is a Hall current sensor, the singlechip 4 is an AT89C2051 singlechip, and the load resistor III 8 is a variable resistor.
The base of the first triode is electrically connected with the I/O interface of the single chip microcomputer 4, a first resistor is connected between the base of the first triode and the I/O interface of the single chip microcomputer 4 in series, the emitting electrode of the first triode is electrically connected with a first relay 10, a green indicator light is electrically connected to the collecting electrode of the first triode, the base of the second triode is electrically connected with the I/O interface of the single chip microcomputer 4, a second resistor is connected between the base of the second triode and the I/O interface of the single chip microcomputer 4 in series, and a red indicator light is electrically connected to the collecting electrode of the second triode.
Example 3
On the basis of embodiment 1 or embodiment 2, relay 10 and relay 9 can share a relay, all set up normally closed contact and normally open contact on this relay, under the circumstances of relay outage, the circuit that normally closed contact connects is the route, the circuit that normally open contact connects is for opening circuit, under the circumstances of relay circular telegram, the circuit that normally closed contact connects is for opening circuit, the circuit that normally open contact connects is the route, automatic switch-over's function has been realized, also can save the code when the singlechip is programmed simultaneously.
The power supply circuit and the power supply transformer of the single chip 4, which are referred to in this patent, are all common circuits and designs known to those skilled in the art, and are not technical contents to be protected in this patent, and will not be described in detail here.
Claims (5)
1. A short-circuit overheating alarm device of a power supply circuit of an alarm system comprises a device main body (6), wherein a positive electrode access port (1), a negative electrode access port (3), a positive electrode output port (7), a negative electrode output port (5) and a short-circuit alarm circuit are arranged on the device main body (6), the negative electrode access port (3) is connected with the negative electrode output port (5) through a lead, the positive electrode access port (1) is connected with the positive electrode output port (7) through the short-circuit alarm circuit, the short-circuit alarm circuit is characterized by comprising a current sensor (2), a single chip microcomputer (4), a relay I (10) controlled by the single chip microcomputer (4), a relay II (9) controlled by the single chip microcomputer (4) and a load resistor III (8), a current input electrode of the current sensor (2) is electrically connected with the positive electrode access port (1), and a current input electrode of the current sensor (2) is electrically connected with the relay I (10) and the relay, relay one (10) is connected with anodal delivery outlet (7) electricity, and the digital signal output utmost point of current sensor (2) is connected with the IO interface electricity of singlechip (4), and relay two (9) are connected with anodal delivery outlet (7) electricity, and it has load resistance three (8) to establish ties between relay two (9) and anodal delivery outlet (7), still is connected with alarm indicator on the IO interface of singlechip (4), and relay one (10) are normally closed contact relay, and relay two (9) are normally open contact relay.
2. Short-circuit overheating alarm device, according to claim 1, characterised in that the current sensor (2) is a hall current sensor.
3. The alarm system power supply circuit short-circuit overheating alarm device according to claim 1, wherein the single chip microcomputer (4) is an AT89C2051 single chip microcomputer.
4. The alarm system power supply circuit short circuit overheating alarm device according to claim 1, wherein a first triode is connected to one of the I/O interfaces of the single chip microcomputer (4), a base of the first triode is electrically connected with the I/O interface of the single chip microcomputer (4), a first resistor is connected in series between the base of the first triode and the I/O interface of the single chip microcomputer (4), an emitting electrode of the first triode is electrically connected with the first relay (10), a green indicator light is electrically connected to a collector electrode of the first triode, a second triode is connected to the other I/O interface of the single chip microcomputer (4), a base of the second triode is electrically connected with the I/O interface of the single chip microcomputer (4), a second resistor is connected in series between the base of the second triode and the I/O interface of the single chip microcomputer (4), and a red indicator light is electrically connected to a collector electrode of.
5. The alarm system supply circuit short circuit overheating alarm device according to claim 1, characterised in that the load resistance three (8) is a variable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020895463.XU CN212137276U (en) | 2020-05-25 | 2020-05-25 | Alarm system supply circuit short circuit overheat alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020895463.XU CN212137276U (en) | 2020-05-25 | 2020-05-25 | Alarm system supply circuit short circuit overheat alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212137276U true CN212137276U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020895463.XU Expired - Fee Related CN212137276U (en) | 2020-05-25 | 2020-05-25 | Alarm system supply circuit short circuit overheat alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212137276U (en) |
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2020
- 2020-05-25 CN CN202020895463.XU patent/CN212137276U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201211 |