CN216310250U

CN216310250U - Magnetic flux detects frock

Info

Publication number: CN216310250U
Application number: CN202122349977.2U
Authority: CN
Inventors: 黄阁
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-04-15
Anticipated expiration: 2031-09-27

Abstract

The utility model relates to a magnetic flux detection tool, which comprises: a power supply unit; a switching type hall sensor having a magnetic flux critical value; the triggering part supplies power to the electric component in the tool by the power supply part when being triggered; the first input end of the comparison unit is connected with the output end of the switch type Hall sensor, and the second input end of the comparison unit receives the reference voltage; the first indicating circuit receives the output of the comparison unit and is used for giving an indication when the magnetic flux of the part to be detected is greater than the magnetic flux critical value; and the second indicating circuit receives the output of the comparison unit and is used for sending an indication when the magnetic flux of the part to be detected is less than the magnetic flux critical value. The utility model can conveniently and rapidly detect whether the magnetic flux of the part is qualified or not; the structure is simple, the realization is easy, the cost is low, and the volume is small; the detection result is visually displayed, and the user experience is high.

Description

Magnetic flux detects frock

Technical Field

The utility model belongs to the technical field of magnetic flux detection, and particularly relates to a magnetic flux detection tool.

Background

At present, the application of the magnet is wider, a plurality of electronic products design the magnet to carry out position fixing or relevant parts of the magnet sensor, but the magnetic property of the magnet is stricter to the design requirements of human bodies and products, and the magnetic flux index is used as the measurement standard of the physical parameters of the magnetic material in the profession.

Magnetic flux magnitude is mainly measured using a magnetic flowmeter at present. However, the current mainstream fluxmeter instrument is generally complex in design structure and expensive in price, and is not suitable for the operation requirement of rapidly detecting magnetic flux in a single assembly line in a factory.

Therefore, there is a need for a tool for conveniently and quickly detecting parts meeting a specific magnetic flux range in a single flow line.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to provide a magnetic flux detection tool which can be used for conveniently and quickly detecting whether the magnetic flux of a part is qualified or not and is suitable for quick batch detection; the structure is simple, the realization is easy, the cost is low, and the volume is small; the detection result is visually displayed, and the user experience is high.

In order to solve the technical problems, the utility model provides the following technical scheme for solving the problems:

the application relates to a magnetic flux detects frock, a serial communication port, include:

a power supply unit;

a switching type hall sensor having a magnetic flux critical value;

the triggering part supplies power to the electric component in the tool when triggered;

the first input end of the comparison unit is connected with the output end of the switch type Hall sensor, and the second input end of the comparison unit receives reference voltage;

the first indicating circuit receives the output of the comparison unit and is used for giving an indication when the magnetic flux of the part to be detected is larger than the magnetic flux critical value;

and the second indicating circuit receives the output of the comparison unit and is used for sending an indication when the magnetic flux of the part to be detected is smaller than the magnetic flux critical value.

In the application, the triggering part is a controllable switch, and is connected to a line between the power supply part and a power supply input end of the tool; or

The trigger part is a conductive elastic component and comprises a conductive sheet and a spring, the conductive sheet is connected with the power supply part, and the spring is connected with the power supply input end of the tool;

wherein when the spring is compressed, the conductive tab is connected to the spring and when the spring is reset, the conductive tab is disconnected from the spring.

In this application, magnetic flux detects frock still includes: a bidirectional TVS transient diode having one end connected to a connection point between the output terminal of the switching Hall sensor and the first input terminal and the other end grounded

In the present application, the first indicating circuit is a light indicating circuit and/or a sound indicating circuit;

the second indicating circuit is a light indicating circuit and/or a sound indicating circuit.

In the present application, when the first indicating circuit or the second indicating circuit is a light indicating circuit, the light indicating circuit includes a switch element a and an indicator light;

the control end of the switch element A is connected with the output end of the comparison unit, the first end of the switch element A is connected with the power supply part, and the second end of the switch element A is connected with the indicator light;

when the first indicating circuit or the second indicating circuit is a sound indicating circuit, the sound indicating circuit comprises a switch element A' and a buzzer;

the control end of the switch element A' is connected with the output end of the comparison unit, the first end is connected with the power supply part, and the second end is connected with the buzzer.

In the application, the magnetic flux detection tool comprises an adjustable voltage division circuit, and the output end of the adjustable voltage division circuit provides the reference voltage.

In the application, the triggering part is a conductive elastic assembly and comprises a conductive sheet and a spring, the conductive sheet is connected with the power supply part, and the spring is connected with a power supply input end of the tool;

the magnetic flux detection tool is designed as a tool pen;

the fixture pen is provided with an induction pen point, the spring is arranged in the fixture pen point, when the induction pen point is pressed, the spring is compressed, the conducting strip is connected with the spring, and when the spring resets, the conducting strip is disconnected with the spring.

In this application, place in the switch type hall sensor in the response nib, the response nib is used for contacting the magnetic surface of the part that awaits measuring.

In this application, the frock pen still includes:

the power supply part is a battery, and the battery is arranged in the middle cavity.

In this application, the battery is rechargeable battery, and external power source connects the mouth that charges of frock pen to through charging circuit to the battery charges.

The magnetic flux detection tool provided by the utility model has the following beneficial effects and advantages:

(1) the detection method is simple and rapid to operate, can visually display the detection result and is suitable for rapid assembly line batch detection;

(2) the required device of circuit design of this frock is few, easily integrates the design, realizes simple structure, low cost, small advantage, and the testing personnel of being convenient for carry.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

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

FIG. 1 is a block diagram of an embodiment of a magnetic flux detection tool according to the present invention;

FIG. 2 is a circuit diagram of an embodiment of a magnetic flux detection tool in accordance with the present invention;

fig. 3 is a structural design diagram of an embodiment of a magnetic flux detection tool according to the present invention.

Reference numerals:

10-a power supply section; 20-a switched hall sensor; 30-a trigger; 31-a spring; 32-conductive sheet a; 33-conductive sheet B; 40-a comparison unit; 50-a first indication circuit; 60-a second indicator circuit; 70-a voltage divider circuit;

10' -the pen front end; 11' -an induction pen point; 20' -an intermediate cavity; 30' -pen tip;

BU-buzzer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

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 the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Whether qualified in specific magnetic flux within range in order to detect batched product fast, this application provides a magnetic flux detection frock that is simple and easy, portable, with low costs and detection efficiency is high.

Referring to fig. 1, the magnetic flux detection tool of the present application includes a power supply portion 10, a switching hall sensor 20, a trigger portion 30, a comparison unit 40, a first indication circuit 50, and a second indication circuit 60.

The power supply unit 10 is used to supply electric power to electric components in the tool.

However, for the purpose of energy saving, the power supply part 10 does not supply power to the outside when the tool is not used, and therefore, the trigger part 30 is provided.

When the trigger unit 30 is triggered, the power supply unit 10 supplies power to the electrical component in the tool, and when the trigger unit 30 is not triggered, the power supply unit 10 does not supply power to the electrical component in the tool.

That is, the trigger 30 is connected to a line between the power supply unit 10 and the power input terminal P of the tool, the trigger 30 is triggered to indicate that the line between the power output terminal of the power supply unit 10 and the power input terminal P is connected, and the trigger 30 is not triggered to indicate that the line between the power output terminal of the power supply unit 10 and the power input terminal P is disconnected.

The trigger unit 30 may be a controllable switch, and when the controllable switch is pressed down and closed, the power supply unit 10 outputs power to the power consuming part, and when the controllable switch is opened and closed, the power supply unit 10 does not output power to the power consuming part.

The trigger 30 may also be a conductive elastic member.

The conductive elastic assembly comprises a conductive sheet A and a spring, the conductive sheet A is electrically connected with the power supply part 10, and the spring is connected with the power supply input end P of the tool.

When the spring is compressed, it contacts the conductive sheet a, connecting the power supply 10 to the power input terminal P, representing a line connecting the power output terminal of the power supply 10 to the power input terminal P.

When the spring is reset, the spring is disconnected from the conductive sheet a, so that the power supply unit 10 is disconnected from the power input terminal P, which means that the line between the power output terminal of the power supply unit 10 and the power input terminal P is disconnected.

In order to maintain good contact between the spring and the conductive sheet a, a conductive sheet B is provided at the tip of the spring and the conductive sheet a.

When the spring is compressed, the conducting plate A and the conducting plate B are in close contact, so that the triggering part 30 triggers; when the spring is reset, the spring drives the conducting strip B to separate from the conducting strip A.

In the present application, the trigger 30 is represented as a switch K1 in fig. 1.

When the trigger unit 30 is triggered, it indicates that the switch K1 is closed; when the trigger unit 30 is not triggered, the switch K1 is turned off.

In the present application, the power supply unit 10 is selected as a battery, and its output power is denoted as Vcc.

The battery may be a rechargeable battery or a non-rechargeable battery, wherein the rechargeable battery may be removable or non-removable.

When the battery is a detachable rechargeable battery, the external charging module can be utilized to charge the rechargeable battery.

When the battery is a non-detachable rechargeable battery, the external power supply is connected with a charging port of the tool and charges the battery through a charging circuit.

In order to satisfy the detection of the magnetic flux of the part to be measured within a certain threshold range, the switching type hall sensor 20 having a magnetic flux critical value is selected.

The switching hall sensor 20 has a magnetic induction BOP at an operating point "on" and a magnetic induction BRP at a release point "off".

When the magnetic induction intensity of the added part to be measured exceeds the operating point BOP, the switch type Hall sensor 20 jumps from a high level V + to a low level V +'; when the magnetic induction intensity falls below the operating point BOP, the output level of the switching hall sensor 20 remains constant at V + ', and the switching hall sensor 20 does not jump from the low level V +' to the high level V + until the magnetic induction intensity falls to BRP.

The hysteresis between the BOP and BRP makes the switching action more reliable.

Therefore, the magnetic flux range of the part to be measured is detected by utilizing this characteristic of the switching hall sensor 20.

The comparison unit 40 is a comparison circuit constructed for a comparator or a common device, and the comparison unit 40 has a first input terminal, a second input terminal and an output terminal.

The comparator may select either a homodyne comparator or an inverting comparator, which applies no difference.

The comparison unit 40 is an inverse comparator U2 as an example.

The first input terminal of the comparing unit 40 is connected to the output terminal of the switching type hall sensor 20, and the second input terminal is connected to the reference voltage Vref.

An output of the comparing unit 40 is connected to an input of the first indicating circuit 50 and an input of the second indicating circuit 60.

The first indicating circuit 50 is used for outputting an indication when the magnetic flux of the part to be detected is larger than the magnetic flux critical value BOP; the second indicating circuit 60 is used for outputting an indication when the magnetic flux of the part to be measured is smaller than the magnetic flux critical value BOP.

The comparison unit 40 outputs a different signal, and the first indicating circuit 50 operates or the second indicating circuit 60 operates.

For example, when the comparison unit 40 outputs a high level, the first instruction circuit 50 outputs an instruction; when the comparison unit 40 outputs a low level, the second instruction circuit 60 outputs an instruction.

When the comparator unit 40 selects the inverting comparator U2, the first input terminal is a positive input terminal and the second input terminal is a negative input terminal.

A second input of the comparing unit 40 receives a reference voltage Vref.

The reference voltage Vref may be a fixed voltage or an output voltage of the voltage divider circuit 70.

Referring to fig. 2, the voltage divider circuit 70 may include a first resistor R1 and a second resistor R2 connected in series, Vcc powers the voltage divider circuit 70, and the reference voltage Vref may be calculated as follows: vref = Vcc ar 2/(R2 + R1).

In order to flexibly provide various reference voltages, the voltage dividing circuit 70 may be an adjustable voltage dividing circuit, that is, the second resistor R2 in the voltage dividing circuit 70 is set as an adjustable resistor, and when the resistance value of R2 changes, the reference voltage Vref also changes.

When the tool is used, the triggering part 10 is triggered, that is, the switch K1 is closed, the switch type hall sensor 20 senses the magnetic flux of the part to be measured, and when the magnetic flux is greater than the magnetic flux critical value BOP, the hall sensor 20 is triggered to output V, and finally V is stabilized to the low level V +'.

If V < Vref, the comparing unit 40 outputs a high level, and the first indicating circuit 50 outputs an indication.

Of course, if the comparing unit 40 is selected as a homodromous comparator, the positive input terminal is connected to the output terminal of the switch type hall sensor 20, and the negative input terminal is connected to the reference voltage Vref, then the comparing unit 40 will output a high level when V > Vref.

When the inspector receives the instruction output from the first instruction circuit 50, it indicates that the magnetic flux of the part to be inspected is acceptable.

When the switching type hall sensor 20 senses the magnetic flux of the part to be measured and the magnetic flux cannot reach the magnetic flux critical value BOP, that is, the magnetic flux is smaller than the magnetic flux critical value BOP, the hall sensor 20 is not triggered, the output V is a high level V +, V > Vref, the comparing unit 40 outputs a low level, and the second indicating circuit 60 outputs an indication at this time.

When the inspector receives the instruction output from the second instruction circuit 60, it indicates that the magnetic flux of the part to be inspected is not acceptable.

In order to clearly feed back the indication to the detection person, the first indicating circuit 50 or the second indicating circuit 60 may be a light indicating circuit and/or a sound indicating circuit.

As follows, referring to fig. 2, the second indicating circuit 60 will be described as a light indicating circuit or a sound indicating circuit, respectively.

The light indicating circuit includes a switching element a and an indicator light, which may be an LED light LED 1.

The switching element a is a low-level conducting switching element, and has a control terminal connected to the output terminal of the comparison unit 40, a first terminal connected to Vcc, and a second terminal connected to the LED 1.

Referring to fig. 2, the switching element turned on at a low level is a PNP transistor Q1.

The base of the PNP triode Q1 can be connected with the output end of the comparison unit 40 through a base current limiting resistor R3, the emitter is connected with Vcc, the collector is connected with a resistor R4 and an LED1 which are sequentially connected in series, and the cathode of the LED1 is grounded.

When the comparing unit 40 outputs a low level, the PNP transistor Q1 is turned on, and the LED1 is turned on.

In the present application, the LED1 may be red when lit, which is a striking alert to the inspector that the magnetic flux of the part being tested is unacceptable.

The sound indicating circuit includes a switching element a and a buzzer.

Referring to fig. 2, the switching element a is a low-level conducting switching element, and its control terminal is connected to the output terminal of the comparing unit 40, its first terminal is connected to Vcc, and its second terminal is connected to the buzzer BU.

The switching element turned on at low level is a PNP transistor Q2.

The base of the PNP triode Q2 can be connected to the output terminal of the comparison unit 40 through the base current limiting resistor R5, the emitter is connected to Vcc, the collector is connected to the buzzer BU through the current limiting resistor R6, wherein the buzzer BU is connected in parallel with the backward diode D1, so that when the buzzer BU is powered off, a path for releasing energy is provided for the buzzer BU, and the PNP triode Q2 is protected.

When the comparing unit 40 outputs a low level, the PNP transistor Q2 is turned on, and the buzzer BU sounds.

Similarly, referring to fig. 2, which illustrates a specific circuit in which the first indicator circuit 50 is a light indicator circuit, the indicator LED2 therein may be green when illuminated in the case where the first indicator circuit 50 is a light indicator circuit.

Referring to fig. 2, the tool further includes a bidirectional TVS transient diode TVS2 and a filter circuit.

TVS2 has one terminal connected to Vcc and the other terminal connected to ground.

The filter circuit selects a filter capacitor C1, one end of the filter capacitor C1 is connected between one end of the TVS2 and the connection point of Vcc, and the other end is grounded.

The TVS2 and the filter circuit are arranged between the power input end P of the tool and the power supply end for supplying electric energy to the indicating circuit in parallel, so that the electrostatic discharge effect, the surge of the alternating current power supply, the noise of the switch K1 and the like are avoided.

The tool is formed by building a plurality of simple electric devices, and is simple in structure and low in cost; the integration is easy, the integration degree is high, the volume is small, and the carrying is convenient; the magnetic flux of the parts can be quickly detected through the tool, the detection efficiency is high, and the tool is suitable for batch part detection; through indicating circuit, the testing result of visual reflection part uses experience degree height.

In addition, referring to fig. 2, since there is a jump in the output V of the switching type hall sensor 20, a bidirectional TVS transient diode TVS1 is provided at the output terminal of the switching type hall sensor 20 for protecting the electronic device.

In order to facilitate the use and portability of the tool, the tool is designed as a tool pen, see fig. 3.

The tooling pen includes a pen front end 10', a middle cavity 20' and a pen rear end 30 '.

The intermediate cavity 20' houses most of the electrical components and batteries of the tool.

The pen front end 10 'has an inductive pen point 11', the inductive pen point 11 'is provided with a spring 31 as described above, when the inductive pen point 11' is pressed to contact the magnetic surface of the part to be tested, the spring 31 is compressed, so that the spring 31 is connected with the conductive sheet 32, i.e. the switch K1 in fig. 2 is closed.

To ensure reliable contact of the spring 31 with the conductive plate 32, a conductive plate 33 is provided at the tip of the spring 31 opposite the conductive plate 32.

When the spring 31 is compressed, the conducting sheet 33 is in close contact with the conducting sheet 32, so that reliable connection is realized; when the spring 31 is reset, the spring drives the conducting sheet 33 to separate from the conducting sheet 32, and disconnection is realized.

Referring to fig. 3, the switch type hall sensor 20 is built in the sensing pen tip 11', and can quickly and accurately sense the magnetic flux of the part to be measured when the sensing pen tip 11' is pressed to contact the magnetic surface of the part to be measured.

The indicator light LED1 in the first indicator circuit 50 and the indicator light LED2 in the second indicator circuit 60 are arranged at the rear end 30' of the pen, so that detection results can be observed conveniently by detection personnel when the frock pen is used.

This frock pen is through the magnetic flux of response nib 11' detection part, facilitates the use and portable.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a magnetic flux detects frock which characterized in that includes:

a power supply unit;

a switching type hall sensor having a magnetic flux critical value;

2. The magnetic flux detection tool of claim 1,

the triggering part is a controllable switch and is connected to a circuit between the power supply part and the power supply input end of the tool; or

3. The magnetic flux detection tool of claim 1, further comprising:

and one end of the bidirectional TVS transient diode is connected to the connecting point between the output end of the switch type Hall sensor and the first input end, and the other end of the bidirectional TVS transient diode is grounded.

4. The magnetic flux detection tool of claim 1,

the first indicating circuit is a light indicating circuit and/or a sound indicating circuit;

5. The magnetic flux detection tool of claim 4,

when the first indicating circuit or the second indicating circuit is a light indicating circuit, the light indicating circuit comprises a switch element A and an indicating lamp;

the control end of the switch element A ' is connected with the output end of the comparison unit, the first end of the switch element A ' is connected with the power supply part, and the second end of the switch element A ' is connected with the buzzer.

6. The magnetic flux detection tool of claim 1, wherein the magnetic flux detection tool comprises an adjustable voltage divider circuit, and an output end of the adjustable voltage divider circuit provides the reference voltage.

7. The magnetic flux detection tool of claim 1,

the magnetic flux detection tool is designed as a tool pen;

8. The magnetic flux detection tool of claim 7,

the switch type Hall sensor is arranged in the sensing pen point, and the sensing pen point is used for contacting the magnetic surface of the part to be measured.

9. The magnetic flux detection tool of claim 7, wherein the tool pen further comprises:

10. The magnetic flux detection tool of claim 9, wherein the battery is a rechargeable battery, and an external power source is connected to a charging port of the tool pen and charges the battery through a charging circuit.