CN215728421U

CN215728421U - Direct current detection device

Info

Publication number: CN215728421U
Application number: CN202122073965.1U
Authority: CN
Inventors: 杨海河; 邢勐; 陈珂
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-02-01
Anticipated expiration: 2031-08-30

Abstract

The utility model provides a direct current detection device, wherein N Hall current detection modules are arranged in a shell; the output ends of the Hall current detection modules are connected with the inner side of the corresponding interface on the shell through the PCB arranged in the shell, so that the detection of N paths of direct current is realized by one device.

Description

Direct current detection device

Technical Field

The utility model relates to the technical field of power electronics, in particular to a direct current detection device.

Background

The existing direct current detection mode is generally a current divider or a hall sensor. Wherein:

the shunt is inconvenient to install, must be matched with an ammeter for use, and has questionable resistance reliability along with the lapse of time.

The conventional Hall current sensor has a large device volume, occupies a large space when being installed in a cabinet, and is complicated in installation and wiring; moreover, a plurality of branch currents are usually detected in the existing power distribution cabinet, so that a plurality of current sensors are required to be arranged in the cabinet for synchronous use, and the occupied space is large in actual use; and every hall current sensor all needs to be fixed, and the pencil is many during fixed, and the pencil plug is many, and the pencil is fixed the difficulty, causes the cost higher.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a dc current detecting device to reduce the occupied space and reduce the fixed cost.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

the utility model provides a direct current detection device, comprising: the circuit board comprises a shell, a Printed Circuit Board (PCB) arranged in the shell and N Hall current detection modules; wherein N is a positive integer greater than 1, and:

the output end of each Hall current detection module is respectively connected with the corresponding input end on the PCB;

and the power supply end and the communication end of the PCB are respectively connected with the inner sides of the corresponding interfaces on the shell.

Optionally, at least one interface unit is arranged on the housing;

the interface unit includes: the power supply interface is internally connected with the power supply end, and the communication interface is internally connected with the communication end.

Optionally, the housing is provided with two interface units.

Optionally, the housing is further provided with: a current monitoring indicator light;

and the input end of the current monitoring indicator lamp is connected with the current monitoring output end of the PCB.

Optionally, the housing is further provided with: a communication indicator light;

the input end of the communication indicator light is connected with the communication monitoring output end of the PCB.

Optionally, N ═ 4.

Optionally, the PCB is provided with: the device comprises an AD sampling circuit, a singlechip, a communication module and N signal conditioning circuits; wherein:

the input end of each signal conditioning circuit is respectively connected with the output end of the corresponding Hall current detection module;

the output end of each signal conditioning circuit is respectively connected with the corresponding input end of the AD sampling circuit;

the output end of the AD sampling circuit is connected with the input pin of the singlechip;

the communication pin of the singlechip is connected with the inner side of the communication module;

the outer side of the communication module is connected with the communication end;

the AD sampling circuit, the single chip microcomputer, the communication module and the power supply end of each signal conditioning circuit are all connected with the power supply end.

Optionally, the signal conditioning circuit includes: a differential operational amplifier;

the input end of the differential operational amplifier is connected with the output end of the Hall element corresponding to the Hall current detection module;

the output ends of the differential operational amplifiers are respectively connected with the corresponding input ends of the AD sampling circuits;

and the power supply end of the differential operational amplifier is connected with the power supply end.

Optionally, the communication module is: and an RS485 circuit.

The utility model provides a direct current detection device.A shell of the direct current detection device is internally provided with N Hall current detection modules; the output ends of the Hall current detection modules are connected with the inner side of the corresponding interface on the shell through the PCB arranged in the shell, so that the detection of N paths of direct current is realized by one device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal structure of a main view angle of a dc current detecting device according to an embodiment of the present invention;

fig. 2 is an external top view of a dc current detecting device according to an embodiment of the present invention;

FIG. 3a is a schematic diagram of a 4-way shunt detection architecture provided in the prior art;

FIG. 3b is a schematic diagram of a detection architecture of a 4-way conventional Hall current sensor provided in the prior art;

fig. 4 is a schematic diagram of an architecture for implementing 4-way current detection by using a dc current detection device according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a top portion of a housing of the dc current detecting device according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of an interconnection of two dc current detection devices according to an embodiment of the present invention;

fig. 7 is a partial circuit diagram of a PCB according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The utility model provides a direct current detection device, which is used for reducing the occupied space and the fixed cost.

Referring to fig. 1, the dc current detection apparatus includes: the circuit board comprises a shell 101, a PCB102 and N Hall current detection modules 103, wherein the PCB102 and the N Hall current detection modules 103 are arranged inside the shell 101; wherein N is a positive integer greater than 1, and:

the output end of each hall current detection module 103 is connected to the corresponding input end on the PCB102, respectively, to transmit its own output signal to the PCB 102.

The power supply terminal and the communication terminal of the PCB102 are respectively connected to the inner sides of the corresponding interfaces on the casing 101, and each interface on the casing 101 may be implemented in the form of a post, but is not limited thereto. Specifically, the housing 101 is provided with at least one pair of power supply interfaces, such as 24V + and 24V-shown in fig. 2, which are not limited to 24V power supply voltage in practical application, and this is only an example, and is determined according to the specific application environment, and is within the protection scope of the present application; the housing 101 is further provided with at least one pair of communication interfaces, such as RS485 + and RS 485-shown in fig. 2, which is not limited thereto, depending on the specific application environment. In practice, the PCB102 may be disposed on top of the device to facilitate interfacing with the housing 101.

The output signals of the hall current detection modules 103 are converted through the PCB102, and the PCB102 can output the current value of each measured current, so that the current value can be directly read by an upper computer. In practical application, the addresses of the hall current detection modules 103 can be set through the communication interfaces by using small address setting tools, so that the direct current detection device can output the current value of N paths of detected currents through the same pair of communication interfaces.

According to the direct current detection device provided by the embodiment, through the structure and the principle, the detection of N paths of direct current is realized by one device, and compared with N Hall current sensors in the corresponding technology, the direct current detection device provided by the utility model reduces the total occupied space, reduces external fixed wiring harnesses and reduces the fixing cost.

In practical applications, the dc current detecting device is mainly used for monitoring current of the main circuit and the branch circuit, and will be described with N being 4:

referring to fig. 3a, if a conventional current divider is used to detect the direct current of 4-way air switches (such as air switch 1, air switch 2, air switch 3 and air switch 4 shown in the figure), the structure is distributed and the wiring is complex; referring to fig. 3b, if the conventional single-path hall current sensor is used to detect the direct current of the 4-path air switch (such as the air switch 1, the air switch 2, the air switch 3, and the air switch 4 shown in the figure), the structural arrangement and the wiring of the sensor are both 4 times of the requirements of the single-path hall current sensor.

The direct current detection device provided by the embodiment is based on the hall current induction loop, and the whole hall structure is adjusted in the design process, so that one device can monitor 4 paths of current; as shown in fig. 4, the 4 measured currents (measured current 1, measured current 2, measured current 3 and measured current 4) are all output through the same pair of communication interfaces, and share the same pair of power supply interfaces to receive external power supply, so that the wiring is convenient, the structure is compact, and the total occupied space is small. The experimental data that can effectively reduce the space after using this device structure show, compare traditional structure, use this structure length direction size to reduce 15%, the width direction does not take mounted position to reduce 10%, takes mounted position to reduce 32%. In the application of monitoring four-path branch current by an actual cabinet, the scheme of the device can reduce the installation space by more than 65%. The space-saving device can be used for arranging other devices and achieves the effect of attractive appearance of the cabinet.

In practical application, the value of N can be any, and the advantages can be realized as long as the value is greater than 1; in addition, theoretically, only 2 power lines and 2 communication lines are needed no matter how many branches are needed, and the connection between the power lines and external equipment can be realized; therefore, compared with N hall current sensors in the corresponding technology, the direct current detection device provided by the embodiment can also reduce wiring complexity and facilitate operation; in addition, in the same cabinet, the more branches are, the better effect is; to the more application scene of rack branch, use this device can with a plurality of air switch seamless installation, the threading is convenient, has optimized mounting structure and wiring, makes the workman more convenient when the installation wiring, accomplishes the most convenient of installation and wiring in the occasion of many branches, can reach the pleasing to the eye effect of rack simultaneously.

On the basis of the above embodiment, the present embodiment provides a more preferable dc current detection device, referring to fig. 5, which shows a top plan view of the housing 101, the housing 101 is provided with at least one interface unit (2 and 5 shown in the figure); the interface unit includes: a pair of power supply interfaces that connect the power supply terminals of the PCB102, and a pair of communication interfaces that connect the communication terminals of the PCB 102.

In practical application, any number of interface units can be arranged on the shell 101, different direct current detection devices are correspondingly connected through one interface unit of each direct current detection device, communication transmission and power supply transmission between the direct current detection devices can be achieved, when a plurality of direct current detection devices in a cabinet are used together, external wiring does not need to be conducted on each direct current detection device, and wiring is transmitted through each direct current detection device.

Preferably, the housing 101 is provided with two interface units, as shown in fig. 2, 4 and 5, respectively disposed at two sides thereof, different dc current detection devices can be connected one by one, so as to achieve left and right interconnection of a plurality of dc current detection devices, and fig. 6 shows a case where two dc current detection devices are connected.

The rest of the structure and the principle can be referred to the above embodiment, and are not described in detail here.

In practical applications, referring to fig. 5, the housing 101 may further include: current monitoring indication, 4; the input end of the current monitoring indicator lamp 4 is connected with the current monitoring output end of the PCB102 so as to realize the function of prompting whether the detected current is normal or not.

In addition, the housing 101 may further include: a communication indicator lamp 3; the input end of the communication indicator lamp 3 is connected with the communication monitoring output end of the PCB102, so as to realize the monitoring prompt of whether the direct current detection device is in normal communication.

For mounting and fixing, the housing 101 should be provided with a corresponding fixing connector, such as the screw 1 shown in fig. 5, but not limited thereto.

On the basis of the above embodiments, this embodiment also provides an example of a circuit structure on the PCB102 in the dc current detection device, referring to fig. 7, which specifically includes: the digital signal processing circuit comprises an AD sampling circuit 202, a singlechip 203, a communication module 204 and N signal conditioning circuits 201 (only 1 signal conditioning circuit 201 is shown in the figure); wherein:

the input end of each signal conditioning circuit 201 is connected to the output end of the corresponding hall current detection module 103, receives the weak voltage signal output by the corresponding hall current detection module 103, and then the signal conditioning circuit 201 amplifies the weak voltage signal.

The output end of each signal conditioning circuit 201 is connected to the corresponding input end of the AD sampling circuit 202.

The output end of the AD sampling circuit 202 is connected with the input pin of the singlechip 203. The AD sampling circuit 202 is controlled by the single chip microcomputer 203, converts a received analog signal into a digital signal, outputs the digital signal to the single chip microcomputer 203, and then sends the signal to the communication module 204 after a series of operations are performed by the single chip microcomputer 203.

The communication pin of the singlechip 203 is connected with the inner side of the communication module 204.

The outside of the communication module 204 is connected to the communication terminal of the PCB 102.

The power supply ends of the AD sampling circuit 202, the single chip 203, the communication module 204 and each signal conditioning circuit 201 are all connected with the power supply end of the PCB 102. In practical applications, a corresponding power supply circuit may be further provided to generate a power supply voltage adapted to a corresponding device, which is not specifically limited herein and is determined according to an application environment, and all of which are within the protection scope of the present application.

In practical applications, the signal conditioning circuit 201 mainly includes: a differential operational amplifier (i.e., the op-amp in fig. 7); the input end of the differential operational amplifier is connected with the output end of the Hall element corresponding to the Hall current detection module 103; the output ends of the differential operational amplifiers are respectively connected with the corresponding input ends of the AD sampling circuit 202; the power supply terminal of the differential operational amplifier is connected to the power supply terminal of the PCB 102.

Optionally, the communication module 204 is: an RS485 circuit, such as the RS485 interface chip shown in fig. 7, but not limited thereto, may be determined according to the specific application environment, and is within the protection scope of the present application.

The rest of the structure and the principle are the same as those of the above embodiments, and are not described in detail here.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other to enable those skilled in the art to make or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A direct current detection device, comprising: the circuit board comprises a shell, a Printed Circuit Board (PCB) arranged in the shell and N Hall current detection modules; wherein N is a positive integer greater than 1, and:

2. The direct current detection device according to claim 1, wherein at least one interface unit is provided on the housing;

3. The direct current detection device according to claim 2, wherein two of the interface units are provided on the housing.

4. The direct current detection device according to claim 1, wherein the housing further includes: a current monitoring indicator light;

5. The direct current detection device according to claim 1, wherein the housing further includes: a communication indicator light;

6. The direct current detection device according to any one of claims 1 to 5, wherein N-4.

7. The direct current detection device according to any one of claims 1 to 5, wherein the PCB is provided with: the device comprises an AD sampling circuit, a singlechip, a communication module and N signal conditioning circuits; wherein:

8. The direct current detection device according to claim 7, wherein the signal conditioning circuit comprises: a differential operational amplifier;

9. The direct current detection device according to claim 7, wherein the communication module is: and an RS485 circuit.