CN217360043U - Current inductor - Google Patents

Abstract

The utility model provides a current inductor, which comprises an insulating shell; the insulating fixing band is arranged on the shell on one side of the insulating shell; a circuit board disposed within the insulative housing; the circuit board comprises a detection circuit, a singlechip and an indicator light; the detection circuit detects whether current exists in the detected object, and the output end of the detection circuit is connected with the single chip microcomputer; the indicator light is connected with the single chip microcomputer. The detection circuit in the current sensor is used for detecting whether the detected wire has current or not, and the insulating fixing belt with the open structure improves the convenience of the current sensor in use; when in use, the detection is not required to be carried out by penetrating through a detected lead, and the application range is wide.

Description

Current inductor

Technical Field

The utility model relates to an electrical components especially relates to a current inductor.

Background

At present, the existing current inductor is composed of a mutual inductor, a mutual inductor core and a low-intensity magnetic field intensity sensor. When the device is used, a detected lead penetrates through the mutual inductance iron core so as to form a single-turn main coil, the main coil and the mutual inductance coil which is fixed on the mutual inductance iron core originally form a mutual inductor, then a magnetic field signal is detected through the weak magnetic field intensity sensor, and whether the detected lead has current or not is judged. However, the mutual inductor must adopt a mutual inductance form, so that the mutual inductor has larger volume, higher mass and higher price; and is inconvenient to use and must be threaded through a wire to be effective.

Therefore, how to solve the problems of inconvenient use and large volume of the current inductor has become one of the problems to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the present invention provides a current sensor for solving the problems of inconvenient use and large volume of the current sensor in the prior art.

To achieve the above and other related objects, the present invention provides a current sensor, which comprises

An insulating housing;

the insulating fixing band is arranged on the shell on one side of the insulating shell;

a circuit board disposed within the insulative housing; the circuit board comprises a detection circuit, a singlechip and an indicator light; the detection circuit detects whether current exists in the detected object, and the output end of the detection circuit is connected with the single chip microcomputer; the indicator light is connected with the single chip microcomputer.

Optionally, the insulating housing is of a tetragonal structure.

Optionally, the insulation fixing band is integrally formed with the insulation housing.

Optionally, the insulation fixing band is of an open structure.

More optionally, the insulation fixing band comprises two connecting portions; one end of each of the two connecting parts is arranged on the insulating shell, and the other end of each of the two connecting parts forms an opening.

More optionally, the cross section of the connecting portion is an arc-shaped structure, and concave surfaces of the two arc-shaped structures are arranged oppositely.

Optionally, the shell on the side of the insulating shell far away from the insulating fixing belt is detachable.

Optionally, the shell of the insulating shell is provided with a small hole; the lamp cap of the indicator lamp is arranged in the small hole.

Optionally, the indicator light is an LED light.

Optionally, the detection circuit is a weak magnetic field strength sensor.

Optionally, the circuit board further comprises a power circuit, and the power circuit supplies power to the circuit board.

As described above, the current sensor of the present invention has the following advantages:

the current inductor of the utility model does not adopt the mutual inductance form, and detects whether the current exists in the tested wire through the weak magnetic field intensity sensor; the insulating fixing belt with the opening structure improves the convenience of the current sensor in use, and can play a role without penetrating through a tested wire; insulating casing and insulating fixed band possess insulating effect, have avoided the electric shock danger in the use.

Drawings

Fig. 1 shows a schematic structural diagram of the current sensor of the present invention.

Fig. 2 is a right side view of fig. one.

Fig. 3 is a schematic diagram of the circuit board of the current sensor according to the present invention.

Fig. 4 is a schematic view of the working principle of the current sensor according to the present invention.

Description of the element reference numerals

1 insulating housing

2 insulating fixed band

2A, 2B connection

3 Circuit board

31 weak magnetic field strength sensor

32 single chip microcomputer

33 indicating lamp

34 power supply circuit

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Please refer to fig. 1-4. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

The present embodiment provides a current sensor, which includes an insulating housing 1, an insulating fixing band 2 and a circuit board 3.

As shown in fig. 1, the insulating housing 1 is a tetragonal structure, the tetragonal structure includes but is not limited to a regular tetragonal structure and an irregular tetragonal structure, the regular tetragonal structure includes but is not limited to a rectangular parallelepiped structure and a tetragonal cube structure; the irregular tetragonal structure includes but is not limited to a tetragonal body in which the lengths of four edges connecting two surfaces are not completely equal, and the specific arrangement structure can be set according to actual use, which is not repeated herein. It should be noted that the insulating housing 1 is not limited to a square structure, and spatial structures such as a triangular pyramid structure and a circular truncated cone structure are applicable as long as a circuit board can be disposed in the insulating housing 1, and the insulating housing is not limited herein.

As shown in fig. 1, the insulation fixing band 2 is disposed on the shell on one side of the insulation casing 1; the one side may be a surface, or a part of a surface, or on the edges of the tetragonal structure, and the specific setting mode is selected according to actual needs, which is not described herein again. And the insulation fixing band 2 is used for fixing a tested wire. Among the current sensor, insulating casing 1 with insulating fixed band 2 is insulating, has avoided the electric shock danger in the use, has promoted the security.

Specifically, the insulation fixing band 2 is integrally formed with the insulation housing 1, thereby increasing stability.

Specifically, the insulating fixing band 2 is of an open structure, so that the use is convenient, and the flexibility is improved; during the use process, the function can be realized without passing through a tested lead. In the existing current inductor, due to the mutual inductance structure, a tested lead is required to have a head part, and the tested lead passes through a mutual inductance iron core (a closed annular structure) from the head part so as to be detected; in the application, the opening structure can be directly sleeved on any part (such as the middle part) of the tested wire without searching for two ends of the wire, so that the application is convenient to use and small in size.

As an implementation manner of the present embodiment, as shown in fig. 2, the insulation fixing tape 2 includes a connecting portion 2A, a connecting portion 2B; one ends, far away from the opening, of the connecting parts 2A and 2B are arranged on the insulating shell 1, and the other ends form an opening.

Specifically, in this embodiment, as shown in fig. 2, the ends of the connecting portion 2A and the connecting portion 2B far away from the opening are respectively disposed on two parallel edges of the same plane of the insulating housing 1, and at this time, the plane formed by the opening is parallel to the plane where the insulating fixing tape 2 contacts the insulating housing 1, so that the appearance is neater and more symmetrical. In actual production, the ends of the connecting portion 2A and the connecting portion 2B away from the opening may be respectively disposed on different planes or non-parallel sides, which is not limited herein.

As another implementation manner of this embodiment, as shown in fig. 2, the cross sections of the connecting portion 2A and the connecting portion 2B are arc structures, and concave surfaces of the two arc structures are opposite to each other; the connecting portions 2A and 2B have a certain extension in the longitudinal direction, and the length of the extension can be set according to needs, which is not limited herein.

As shown in fig. 1, the circuit board 3 is disposed in the insulating housing 1, and the circuit board 3 may be a high-integration module attached to any surface of the insulating housing 1, or may be directly placed in a space inside the insulating housing 1, which is not limited herein.

Specifically, insulating casing 1 keeps away from the casing of insulating fixed band 2 one side can be dismantled, and detachable structure has made things convenient for the later maintenance.

As shown in fig. 3, the circuit board 3 includes a detection circuit, a single chip microcomputer 32 and an indicator light 33; the detection circuit detects whether current exists in the detected object, and the output end of the detection circuit is connected with the single chip microcomputer 32; the indicator light 33 is connected with the singlechip 32.

Specifically, the shell of the insulating shell 1 is provided with a small hole; the lamp cap of the indicator light 33 is arranged in the small hole, so that a user can conveniently and visually judge whether the current sensor senses current from the outside; when the indicator light 33 is on, the current passes through the inner part of the tested lead; when the indicator light 33 is not on, it indicates that no current passes through the inside of the tested lead. In this embodiment, the small hole where the indicator light 33 is located may be disposed on any surface of the insulating housing 1, and the indicator light 33 is only required to be within an observable range, and the specific disposing manner is not limited to this embodiment, and is not described herein any more.

More specifically, the indicator light 33 is an LED light, and the LED light adopts a secondary optical design form (such as a light emitting diode), so that the energy consumption is low and the service life is long.

Specifically, the detection circuit is a low-intensity magnetic field sensor 31, and since a magnetic field is generated around the energized conductor, the low-intensity magnetic field sensor 31 can detect the change of the surrounding magnetic field, and further determine whether a current flows through the tested conductor. The working principle of the weak magnetic field intensity sensor 31 is as follows: measuring the total magnetic field in the environment through the weak magnetic field intensity sensor 31, calculating the direction of the total magnetic field, and converting the direction of the total magnetic field into an angle for output; when the direction of the total magnetic field changes, the angle deviates, and if the deviation exceeds a preset range, the current in the measured lead is judged to pass through. The preset range can be set according to the precision required in practice, and the higher the precision is, the smaller the preset range is; the lower the accuracy, the larger the preset range. It should be noted that, detection circuitry still can be for other components and parts, and all components and parts and circuit structure that can detect magnetic field variation all are applicable to the utility model discloses, it is not repeated here to differ one. In this embodiment, the low-intensity magnetic field intensity sensor 31 is a digital signal interface type sensor, and has high sensitivity, and the low-intensity magnetic field intensity sensors (such as analog signal interfaces) of other interfaces are also suitable for the present invention, which is not limited herein. The utility model discloses a current inductor compares with current, does not adopt mutual inductance form, need not pass the wire and can act on, through whether weak magnetic field intensity sensor 31 can record the measured wire inside has electric current, and is small, convenient to use.

Specifically, the circuit board 3 further includes a power circuit 34, and the power circuit 34 supplies power to the circuit board 3. It should be noted that the circuit board 3 may also be powered by an external power supply; when the circuit board 3 is supplied with power from an external power source, the power supply circuit 34 may not be required.

As shown in fig. 4, the working principle of the present invention may be: the current inductor is fixed on a tested lead through the insulation fixing band 2, and the power circuit 34 supplies power to the current inductor. If there is current in the measured wire, a ring magnetic field will be generated around the measured wire, and the weak magnetic field strength sensor 31 detects the change of the environmental magnetic field; then, the weak magnetic field intensity sensor 31 sends a signal to the single chip microcomputer 32, the single chip microcomputer 32 converts the signal into a control instruction, the indicator light 33 is controlled to be turned on, and a user can judge that current exists in the tested wire after seeing that the light is turned on.

In the current inductor of the utility model, the weak magnetic field strength sensor is used for detecting whether the current passes through the detected lead, which is different from the prior technical proposal that the mutual inductance form is used for detecting whether the current passes through the detected lead; through open structure, need not pass the wire and just can detect, conveniently fix the wire for current sensor uses the flexibility to improve greatly.

In summary, the present invention provides a current sensor, which includes an insulating housing; the insulating fixing band is arranged on the shell on one side of the insulating shell; a circuit board disposed within the insulative housing; the circuit board comprises a detection circuit, a singlechip and an indicator light; the detection circuit detects whether current exists in the detected object, and the output end of the detection circuit is connected with the single chip microcomputer; the indicator light is connected with the single chip microcomputer. The detection circuit in the current sensor of the utility model is used for detecting whether the detected wire has current, and the insulating fixing belt with an open structure improves the use convenience; when in use, the detection is not required to be carried out by penetrating through a detected lead, and the application range is wide. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (11)

1. A current sensor, characterized in that it comprises at least:

an insulating housing;

the insulating fixing band is arranged on the shell on one side of the insulating shell;

a circuit board disposed within the insulative housing; the circuit board comprises a detection circuit, a singlechip and an indicator light; the detection circuit detects whether current exists in the detected object, and the output end of the detection circuit is connected with the single chip microcomputer; the indicator light is connected with the single chip microcomputer.

2. The current inductor of claim 1, wherein: the insulating shell is of a tetragonal structure.

3. The current inductor of claim 1, wherein: the insulation fixing band and the insulation shell are integrally formed.

4. The current inductor of claim 1, wherein: the insulation fixing band is of an open structure.

5. The current inductor of claim 4, wherein: the insulation fixing band comprises two connecting parts; one end of each of the two connecting parts is arranged on the insulating shell, and the other end of each of the two connecting parts forms an opening.

6. The current inductor of claim 5, wherein: the cross section of connecting portion is the arc structure, and the concave surface of two arc structures sets up relatively.

7. The current inductor of claim 1, wherein: the shell body on one side, away from the insulation fixing belt, of the insulation shell can be detached.

8. The current inductor of claim 1, wherein: a small hole is formed in the shell of the insulating shell; the lamp cap of the indicator lamp is arranged in the small hole.

9. The current inductor of claim 1, wherein: the indicator light is an LED light.

10. The current inductor of claim 1, wherein: the detection circuit is a weak magnetic field intensity sensor.

11. The current inductor of claim 1, wherein: the circuit board further comprises a power circuit which supplies power to the circuit board.

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