CN219349102U

CN219349102U - Novel broken wire detection system of Hall sensor

Info

Publication number: CN219349102U
Application number: CN202223270816.5U
Authority: CN
Inventors: 陈闯; 刘星星; 赵志强
Original assignee: Nanjing Pancon Microgrid Technology Co ltd; Nanjing Keyuan Intelligent Technology Group Co ltd
Current assignee: Nanjing Pancon Microgrid Technology Co ltd; Nanjing Keyuan Intelligent Technology Group Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-07-14
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a novel Hall sensor broken line detection system, which comprises a power supply detection module, a detection module and a detection module, wherein the power supply detection module is connected in series between an external power supply and an anode V end of a Hall sensor to detect current in a loop; and one end of the signal wire detection module is connected with an external power supply, and the other end of the signal wire detection module is connected with the output P end of the Hall sensor to output voltage. According to the utility model, through detecting the current and the voltage in the loop and combining with judging the real situation of any line of the Hall sensor, the problem of detecting the broken line of the Hall sensor is effectively solved.

Description

Novel broken wire detection system of Hall sensor

Technical Field

The utility model relates to the technical field of measurement and control, in particular to a novel broken wire detection technology of a Hall sensor.

Background

At present, the Hall sensor is widely applied in the industrial control industry, but no circuit which is high-efficiency and used for automatically detecting the disconnection fault of the Hall sensor exists in the market. In order to quickly find out abnormal line breakage on site and conduct investigation and processing, production accidents caused by incapability of timely finding out abnormal conditions are avoided, and therefore a method is necessary to be studied to solve the problem.

Disclosure of Invention

The utility model aims to provide a novel broken wire detection system of a Hall sensor, which is used for efficiently checking broken wire faults of the Hall sensor.

In general, the hall sensor has three leads, and the pins are defined as a power supply positive electrode, a power supply negative electrode and a sensor signal output respectively. Since the pin marks or line colors of the Hall sensors on the market are not uniform, the actual functions of 3 pins are consistent. To ensure the uniformity of this patent document, these 3 pins are defined in this patent as: positive V end, output P end and negative C end of Hall sensor.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

a novel Hall sensor broken wire detecting system comprises:

the power supply detection module is connected in series between an external power supply and the positive electrode V end of the Hall sensor to detect current in a loop;

and one end of the signal wire detection module is connected with an external power supply, and the other end of the signal wire detection module is connected with the output P end of the Hall sensor to output voltage.

The power supply monitoring module is used for detecting whether current exists in a loop or not and judging whether the positive V end and the negative C end of the Hall sensor are normally connected or not, so that whether the power line of the Hall sensor is broken or not is judged; and whether the output end of the Hall sensor is broken or not is judged through the signal wire detection module, and whether the Hall sensor is broken or not and which end the broken wire end is can be accurately judged through detection combination of a power supply and the signal wire.

Further, the power supply detection module can be composed of an optocoupler HPC354/HPC357/HPC217, wherein the input end is connected with an external power supply and the positive electrode input end V of the Hall sensor, the output end is connected with the external power supply in series with a pull-up resistor, and the voltage of the output end is transmitted to the CPU for detection.

Further, the signal line detection module comprises a pull-up resistor, a pull-down resistor and a switch. The switch is an analog switch, a relay, a triode or an MOS tube. The pull-up resistor is connected with the positive end of the external power supply, the pull-down resistor is connected with the negative end of the external power supply, and a loop is formed, so that different voltage values are tested under different states, and the real state of the output V end of the Hall sensor is judged.

Compared with the prior art, the utility model has the following advantages:

the utility model has the core of the design of the power detection module and the matching design of the signal line detection module, the power detection module is used for judging whether the power line of the sensor is broken, the signal line detection module is used for judging whether the output end of the sensor is broken, and the detection combination of the power supply and the signal line can be used for accurately judging whether the sensor is broken and which end of the broken line is.

According to the utility model, through detecting the current and the voltage in the loop and combining with judging the real situation of any line of the Hall sensor, the problem of detecting the broken line of the Hall sensor is effectively solved.

It should be understood that all combinations of the foregoing concepts, as well as additional concepts described in more detail below, may be considered as part of the inventive subject matter so long as such concepts are not mutually inconsistent.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of the various aspects of the utility model will now be described by way of example and with reference to the accompanying drawings, in which:

FIG. 1 is a Hall equivalent circuit diagram;

FIG. 2 is a schematic block diagram of a novel Hall sensor disconnection detection method of the present utility model;

FIG. 3 is a circuit topology of a power detection module according to the present utility model;

fig. 4 is a circuit topology diagram of a signal line detection module according to the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, unless the context clearly indicates otherwise, singular forms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "comprises," "comprising," or the like are intended to cover a feature, integer, step, operation, element, and/or component recited as being present in the element or article that "comprises" or "comprising" does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "up", "down", "left", "right" and the like are used only to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

The utility model provides a novel Hall sensor broken line detection system, which is shown in figures 1 and 2 and comprises a power supply detection module and a signal line detection module. The power supply detection module can be composed of an optocoupler HPC354 which is connected in series in a loop and can detect whether the power supply positive electrode V end and the power supply negative electrode C end of the sensor are disconnected; the signal line detection module consists of a pull-up resistor and a pull-down resistor, can detect the voltage of the output end of the sensor, judges whether the output end P of the sensor is broken, and can judge which end is broken under the condition that the power supply of the sensor is broken by combining the current detection result.

The utility model discloses a novel Hall sensor broken wire detection method, which is further specifically introduced by combining an embodiment shown in the attached drawings.

As shown in fig. 2, a novel hall sensor disconnection detection system generally comprises a power supply detection module and a voltage detection module. The power supply detection module is used for judging whether the positive electrode V and the negative electrode C of the sensor are disconnected, the signal line detection module is used for judging whether the output end of the sensor is disconnected, and the current detection result can be combined to judge which end is disconnected under the condition that the sensor is disconnected.

As shown in fig. 3, in order to determine whether the power supply end of the sensor is disconnected, an HPC354 optocoupler is used, and one end of the input side is connected to an external power supply and the other end is connected to the power supply positive electrode V of the sensor. One end of the output side is connected with a pull-up resistor and an external power supply, and the other end of the output side is grounded, and the voltage of the PWR-CHECK is transmitted to the CPU.

The specific detection method comprises the following steps: when the positive electrode V end and the negative electrode C end of the power supply of the Hall sensor are normally connected, the HPC354 is conducted, and the PWR-CHECK displays a low level; when the positive V terminal and the negative C terminal of the power supply of the Hall sensor are disconnected, the HPC354 is cut off, and the PWR-CHECK displays a high level.

The voltage detection circuit is composed of a pull-up resistor and a switch as shown in fig. 4.

When the positive electrode V end and the negative electrode C end of the power supply are normally connected and the PWR-CHECK shows a low level, the specific detection is as follows:

when the end P of the sensor output is normally connected, the switch S1 is closed, and when the switch S2 is closed, the voltage of the voltage detection point is the output voltage of the end P of the sensor, and the results are kept consistent for 2 times;

when the output end P of the sensor is broken, S1 is closed, and the voltage of the voltage detection point is high level; closing S2, wherein the voltage of the voltage detection point is low level; the result of 2 times is inconsistent, so that the disconnection of the output end P of the sensor can be judged.

When a certain end of the positive electrode V end and the negative electrode C end of the sensor power supply is disconnected, PWR-CHECK displays a low level, and the output end P of the sensor is normally connected, the specific detection is as follows:

when the positive end V of the power supply of the sensor is disconnected, the switch S1 is closed, the voltage of the voltage detection point is high, the switch S2 is closed, the voltage of the voltage detection point is low, and the result judgment is inconsistent for 2 times, so that the positive end V of the power supply of the sensor can be judged to be disconnected at the moment;

when the power supply negative electrode C end of the sensor is disconnected, the switch S1 is closed, the voltage of the voltage detection point is high, the switch S2 is closed, the voltage of the voltage detection point is high, and the results are judged to be consistent for 2 times, so that the disconnection of the power supply negative electrode C end of the sensor can be judged.

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.

Claims

1. Novel hall sensor broken wire detecting system, its characterized in that includes:

2. The novel hall sensor disconnection detection system of claim 1, wherein the power detection module employs an optocoupler: one end of the input side is connected with an external power supply, and the other end is connected with the positive electrode V end of the Hall sensor; one end of the output side is connected with a pull-up resistor in series and is connected with an external power supply, and the other end is grounded.

3. The novel hall sensor disconnection detection system of claim 2, wherein the optocoupler is an optocoupler HPC354, an optocoupler HPC357, or an optocoupler HPC217.

4. The novel hall sensor disconnection detection system of claim 3, wherein the signal line detection module comprises a pull-up resistor, a pull-down resistor, and a switch; the pull-up resistor is connected with the positive end of the external power supply, and the pull-down resistor is connected with the negative end of the external power supply, so that a detection loop is formed.

5. The novel hall sensor disconnection detection system of claim 4, wherein the switch is an analog switch, a relay, a triode, or a MOS transistor.