CN219122599U - Controller for magnetic proximity sensor - Google Patents
Controller for magnetic proximity sensor Download PDFInfo
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- CN219122599U CN219122599U CN202320275928.5U CN202320275928U CN219122599U CN 219122599 U CN219122599 U CN 219122599U CN 202320275928 U CN202320275928 U CN 202320275928U CN 219122599 U CN219122599 U CN 219122599U
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- proximity sensor
- pole
- acquisition unit
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Abstract
The present utility model relates to the field of magnetic proximity sensors, and more particularly, to a controller for a magnetic proximity sensor. Through add magnetism acquisition circuit on control circuit board, and magnetism acquisition circuit is including N utmost point acquisition unit and the S utmost point acquisition unit that are connected with the control chip electricity respectively, and be equipped with the part that is used for preventing the misidentification on just corresponding the position of the magnetic induction face that N utmost point acquisition unit and S utmost point acquisition unit were located on the surface of casing, because set up the part that is used for preventing the misidentification in above-mentioned specific position, when using planar magnet to be close to this controller, N utmost point acquisition unit and S utmost point acquisition unit can't be gathered effective output simultaneously, and then can prevent the misidentification that uses planar magnet.
Description
Technical Field
The present utility model relates to the field of magnetic proximity sensors, and more particularly, to a controller for a magnetic proximity sensor.
Background
The magnetic proximity sensor is generally used for industrial mechanical equipment and automatic production lines, and plays roles of limiting protection, positioning monitoring and the like. The magnetic proximity sensor utilizes a magnetic substance to approach and drive a sensing element, namely a reed pipe, and outputs high and low level signals according to the on-off state of the reed pipe. However, such a magnetic proximity sensor cannot recognize misjudgment and false detection caused by external electromagnetic interference or environmental changes such as an induction element, and has potential safety hazards in use. If a magnetic acquisition circuit is adopted, namely N, S poles are added for acquisition, once a traditional planar magnet is manually used to approach the sensor, the identification function of the magnetic acquisition circuit is easily and wrongly identified.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the controller for the magnetic proximity sensor not only can effectively avoid misjudgment and misdetection caused by environmental changes such as electromagnetic interference and the like, but also can solve the problem that the identification function of the magnetic acquisition circuit is misidentified.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a controller for magnetism proximity sensor, includes the casing and locates control circuit board in the casing, be equipped with control chip on the control circuit board and with the tongue tube circuit that control chip electricity is connected, still be equipped with magnetism acquisition circuit on the control circuit board, magnetism acquisition circuit is including N utmost point acquisition unit and the S utmost point acquisition unit that are connected with the control chip electricity respectively, be equipped with the part that is used for preventing the misrecognition on the surface of casing and correspond on the position of the magnetic induction face that N utmost point acquisition unit and S utmost point acquisition unit are located.
Furthermore, the control circuit board is arranged in parallel with one side surface of the shell, the N-pole collecting unit and the S-pole collecting unit are respectively arranged at two end positions corresponding to one side surface of the shell, and the part is a protruding part arranged at the central position of one side surface of the shell.
Further, the protruding portion is hemispherical in shape.
Further, the radius of the hemispherical body corresponding to the protruding part ranges from 2.5mm to 3.5mm.
Further, the radius of the corresponding hemisphere of the protruding part is 3mm.
Further, the N pole collecting unit and the S pole collecting unit are both positioned on one side of the control circuit board facing one side face of the shell.
Further, the gap between the control circuit board and the inner surface of one side surface of the shell ranges from 1mm to 2mm.
Further, a gap between the control circuit board and the inner surface of one side surface of the shell is 1.5mm.
Furthermore, the material of one side surface of the shell is a nonmetallic material.
Further, the shell is cuboid in shape, and one side face of the shell is the side face where the long side of the cuboid is located.
The utility model has the beneficial effects that:
the controller for the magnetic proximity sensor provided by the utility model is characterized in that the magnetic acquisition circuit is additionally arranged on the control circuit board and comprises an N-pole acquisition unit and an S-pole acquisition unit which are respectively and electrically connected with the control chip, and a part for preventing false identification is arranged on the outer surface of the shell and corresponds to the position of a magnetic induction surface where the N-pole acquisition unit and the S-pole acquisition unit are positioned.
Drawings
FIG. 1 is a schematic diagram of a controller for a magnetic proximity sensor according to the present utility model;
FIG. 2 is an exploded view of a controller for a magnetic proximity sensor according to the present utility model from a perspective;
FIG. 3 is an exploded view of another view of a controller for a magnetic proximity sensor in accordance with the present utility model;
FIG. 4 is a partial circuit diagram of a controller for a magnetic proximity sensor of the present utility model;
FIG. 5 is a circuit diagram of a N, S pole magnetic sense of a controller for a magnetic proximity sensor in accordance with the present utility model;
FIG. 6 is a circuit diagram of a DCDC power supply for a controller of a magnetic proximity sensor of the present utility model;
description of the reference numerals:
1. a controller; 11. a housing; 111. a protruding portion; 12. a control circuit board; 121. an N-pole acquisition unit; 122. an S pole acquisition unit; 123. a reed switch circuit;
2. u-shaped magnet.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 6, the controller for a magnetic proximity sensor provided by the utility model comprises a housing and a control circuit board arranged in the housing, wherein the control circuit board is provided with a control chip and a reed switch circuit electrically connected with the control chip, the control circuit board is also provided with a magnetic acquisition circuit, the magnetic acquisition circuit comprises an N-pole acquisition unit and an S-pole acquisition unit which are respectively electrically connected with the control chip, and a part for preventing false identification is arranged on the outer surface of the housing and at a position corresponding to a magnetic induction surface where the N-pole acquisition unit and the S-pole acquisition unit are positioned.
From the above description, the beneficial effects of the utility model are as follows:
the controller for the magnetic proximity sensor provided by the utility model is characterized in that the magnetic acquisition circuit is additionally arranged on the control circuit board and comprises an N-pole acquisition unit and an S-pole acquisition unit which are respectively and electrically connected with the control chip, and a part for preventing false identification is arranged on the outer surface of the shell and corresponds to the position of a magnetic induction surface where the N-pole acquisition unit and the S-pole acquisition unit are positioned.
Furthermore, the control circuit board is arranged in parallel with one side surface of the shell, the N-pole collecting unit and the S-pole collecting unit are respectively arranged at two end positions corresponding to one side surface of the shell, and the part is a protruding part arranged at the central position of one side surface of the shell.
From the above description, through the above specific structural design, the acquisition performance of the N-pole acquisition unit and the S-pole acquisition unit can be ensured to reach a mutually balanced state, which is beneficial to improving the recognition accuracy.
Further, the protruding portion is hemispherical in shape.
As can be seen from the above description, the protruding portion is hemispherical, and when the planar magnet is used to approach the controller, the two ends of the planar magnet are in a teeterboard state under the action of the protruding portion, that is, only one end of the planar magnet is attached to the housing, and the other end of the planar magnet is far away from the housing, so that the housing cannot be attached to the housing at the same time, and at this time, the N-pole collecting unit and the S-pole collecting unit cannot be collected to be output effectively at the same time, so that misidentification using the planar magnet can be prevented.
Further, the radius of the hemispherical body corresponding to the protruding part ranges from 2.5mm to 3.5mm.
Further, the radius of the corresponding hemisphere of the protruding part is 3mm.
From the above description, when the radius of the hemisphere corresponding to the protruding part is 2.5 mm-3.5 mm, a lot of experiments prove that the false recognition rate is less than 1% by using a planar magnet, and when the radius is 3mm, the false recognition rate can be satisfied, and the volume can be reduced as much as possible.
Further, the N pole collecting unit and the S pole collecting unit are both positioned on one side of the control circuit board facing one side face of the shell.
From the above description, the N-pole collecting unit and the S-pole collecting unit are located on the same side and face one side of the shell, so that the collecting performance of the N-pole collecting unit and the S-pole collecting unit can reach a mutually balanced state, and meanwhile, the influence of the circuit board on the collecting performance is reduced, and the identifying performance is further improved.
Further, the gap between the control circuit board and the inner surface of one side surface of the shell ranges from 1mm to 2mm.
Further, a gap between the control circuit board and the inner surface of one side surface of the shell is 1.5mm.
From the above description, the specific parameters are adopted, so that not only the assembly clearance requirement is met, but also the N-pole collecting unit and the S-pole collecting unit can be close to the inner surface of one side surface of the shell as much as possible, and further the identification performance is improved.
Furthermore, the material of one side surface of the shell is a nonmetallic material.
From the above description, it is known that the nonmetallic material can avoid signal interference to the N-pole acquisition unit and the S-pole acquisition unit.
Further, the shell is cuboid in shape, and one side face of the shell is the side face where the long side of the cuboid is located.
Referring to fig. 1 to 6, a first embodiment of the present utility model is as follows:
it should be noted that, the electronic components used in this embodiment all use existing products.
As shown in fig. 1 to 3, the controller 1 is used in cooperation with a U-shaped magnet 2. Of course, the U-shaped magnet 2 is not limited.
The control 1 comprises a shell 11 and a control circuit board 12 arranged in the shell 11, wherein the shell 11 is cuboid in shape, and the control circuit board 12 is arranged close to the side face of the shell corresponding to the long side of the cuboid, and the side face is a side face of the shell. One side surface of the shell is made of nonmetal materials, such as plastics. Of course, in practical products, a whole housing is made of plastic.
The control circuit board 12 is arranged in parallel with one side surface of the shell, and a gap between the control circuit board and the inner surface of one side surface of the shell is 1.5mm. By adopting the specific parameters, the requirement of assembly clearance is met, the N-pole collecting unit and the S-pole collecting unit can be close to the inner surface of one side surface of the shell as much as possible, and the identification performance is improved.
The control circuit board 12 is provided with a control chip, a magnetic acquisition circuit and a reed switch circuit 123 which are respectively electrically connected with the control chip, the magnetic acquisition circuit comprises an N-pole acquisition unit 121 and an S-pole acquisition unit 122 which are respectively electrically connected with the control chip, the N-pole acquisition unit and the S-pole acquisition unit are both positioned on one side of the control circuit board facing one side of the shell, namely on the same side and one side facing one side of the shell, the acquisition performance of the N-pole acquisition unit and the S-pole acquisition unit can reach a mutual balance state, meanwhile, the influence of the circuit board on the acquisition performance is reduced, and the identification performance is further improved.
The N pole collecting unit and the S pole collecting unit are respectively arranged at two ends of one side face of the shell, and a part for preventing false identification is arranged on the outer surface of the shell and at the position corresponding to the magnetic induction face where the N pole collecting unit and the S pole collecting unit are located. The member is a protrusion 111 provided at a central position of one side surface of the housing. The protruding portion 111 has a hemispherical shape. The radius of the hemispherical body corresponding to the protruding part 111 is 3mm. When the radius is 3mm, the requirement of the false recognition rate can be met, and the volume can be reduced as much as possible.
The shape of the protruding portion 111 is hemispherical, when the planar magnet is used to approach the controller, due to the effect of the protruding portion, the two ends of the planar magnet are in a teeterboard state, namely, only one end of the planar magnet is attached to the shell, the other end of the planar magnet is far away from the shell, so that the planar magnet cannot be attached to the shell at the same time, and at the moment, the N-pole collecting unit and the S-pole collecting unit cannot be collected to be effectively output at the same time, so that misidentification of the planar magnet can be prevented.
The control circuit board is also provided with a DCDC power supply unit, a state display unit and a reset unit;
the control chip, the magnetic acquisition circuit, the reed switch circuit, the DCDC power supply unit, the state display unit and the reset unit are electrically connected as follows:
as shown in fig. 4, the control chip has at least six pins for signal input/output, and in this embodiment, only six pins are needed.
As shown in fig. 6, the dcdc power supply unit is composed of a buck chip U2, a resistor R1, a diode D1, and capacitors C1 to C3, and is connected in a circuit according to fig. 6, so as to convert the 24V input into a stable VCC power supply output for use in subsequent units.
The magnetic acquisition circuit is electrically connected with the input end of the control chip. The magnetic acquisition circuit comprises an N-pole acquisition unit and an S-pole acquisition unit, and the N-pole acquisition unit and the S-pole acquisition unit are respectively and electrically connected with the input end of the control chip.
As shown in fig. 5, specifically, the N-pole collecting unit includes an N-pole magnetic sensing device Q1 and a capacitor C5, where the N-pole magnetic sensing device Q1 is connected in parallel with the capacitor C5, one end of the N-pole magnetic sensing device Q1 after being connected in parallel is electrically connected to a power VCC of an external device, and the other end of the N-pole magnetic sensing device Q1 after being connected in parallel is grounded, and an output end of the N-pole magnetic sensing device Q1 is electrically connected to an input end (IO 1 pin) of the control chip;
the S-pole acquisition unit comprises an S-pole magnetic induction device Q2 and a capacitor C6, wherein the S-pole magnetic induction device Q2 is connected with the capacitor C6 in parallel, one end of the S-pole magnetic induction device Q2 after being connected in parallel is electrically connected with a power supply VCC (voltage-current) of the peripheral equipment, the other end of the S-pole magnetic induction device Q2 after being connected in parallel is grounded, and the output end of the S-pole magnetic induction device Q2 is electrically connected with the input end (IO 2 pin) of the control chip.
As shown in fig. 4, the reed switch circuit includes an isolation chip U3, a resistor R4, a resistor R5, a diode D4, a fuse F1, a resistor R2, and a field effect transistor Q3; the isolation chip U3 is an optocoupler chip, one end of the isolation chip U3 is electrically connected with the output end (IO 3 pin) of the control chip, the other end of the isolation chip U3 is electrically connected with one end of the reed switch, and the other end of the reed switch is electrically connected with the input end (IO 4 pin) of the control chip.
One end of the resistor R4 is electrically connected with a power supply VCC of the peripheral device, the other end of the resistor R4 is electrically connected with a first pin of one end of the optocoupler chip, and a second pin of one end of the optocoupler chip is electrically connected with an output end (IO 3 pin) of the control chip.
The first pin of the other end of the optocoupler chip is electrically connected with one end of a reed pipe S2, the other end of the reed pipe S2 is electrically connected with a peripheral 24V power supply through a resistor R5, the other end of the reed pipe S2 is electrically connected with the negative electrode of a diode D4, the positive electrode of the diode D4 is grounded, and the second pin of the other end of the optocoupler chip is grounded through a fuse F1. The other end of the reed switch S2 is electrically connected with the drain electrode of the field effect tube Q3, the grid electrode of the field effect tube Q3 and one end of the resistor R2 are electrically connected with a power supply VCC (voltage-current) of the peripheral equipment, and the source electrode of the field effect tube Q3 and the other end of the resistor R2 are electrically connected with the input end (IO 4 pin) of the control chip.
When the magnetic collection of N, S poles all detects signals, namely, when the IO1 pin and the IO2 pin all input high levels, the output end (IO 3 pin) of the control chip gives low levels to the second pin at one end of the optical coupler chip, when the reed switch S2 detects signals, namely, the reed switch S2 is high level, the optical coupler chip is triggered to be conducted, the input end (IO 4 pin) of the control chip is given high levels, at the moment, the control chip judges that the identification is finished, otherwise, the identification is judged to be abnormal.
As shown in fig. 4, the status display unit is electrically connected to an output terminal (IO 5 pin) of the control chip. The state display unit comprises a light emitting diode D2 and a resistor R3; the negative electrode of the light emitting diode D2 is electrically connected with the output end of the control chip, the positive electrode of the light emitting diode D2 is electrically connected with one end of the resistor R3, and the other end of the resistor R3 is electrically connected with the power supply VCC of the peripheral equipment. The status of the led D2 can indicate whether the current circuit is abnormal, for example, the led D2 displays red when abnormal and green when normal.
As shown in fig. 4, the reset unit includes a reset switch S1; one end of the reset switch S1 is electrically connected with the output end of the control chip, and the other end of the reset switch S1 is grounded. The reset switch S1 can realize the function of system reset.
Working principle:
the power supply is input, internal working voltage is generated through the power supply DC-DC module, the magnetic pole collecting circuit collects and receives magnetic pole signals, the magnetic pole signals are input into the MCU, the MCU logic judges that the magnetic pole signals trigger and the polarity is consistent with the preset value, and the trigger drive output circuit outputs signals, namely IO3 outputs low level. The output signal drives and collects the input of the reed pipe, and when the input is provided by the reed pipe, the input is high level, so that the optical coupler chip is triggered to be conducted, and the high level is given to the input end (IO 4 pin) of the control chip. When the magnetic pole detection signal or the reed switch signal is abnormal, an abnormal alarm is sent, and after the reset signal is reset after the power is cut off and restarted or triggered, the circuit is restored to a normal state.
The specific circuit diagram is as follows:
DC-DC power supply circuit: the input power supply is protected from error connection and fool proofing, the power supply is filtered, and the internal U2 is stabilized. Q1/Q2 detects the N/S polarity, U3 introduces signal detection, logic operation, D2 lights the alarm indication normally when the polarity signal is wrong. When the judging result is correct, the output is carried out by U3, the signal of the reed switch S2 is collected and output, F1 is output protection, meanwhile, the output state is fed back to the MCU through Q3, the MCU carries out logic operation, and when the judging result is incorrect, the D2 sends out a flicker indication signal. When the normally-bright or blinking state of D2 is abnormal, S1 is reset, and the normal state is restored. The product has the functions of self-diagnosis, reset and signal output, detects matched targets, and has the function of accurate polarity identification.
In summary, according to the controller for a magnetic proximity sensor provided by the utility model, the magnetic acquisition circuit is additionally arranged on the control circuit board, and the magnetic acquisition circuit comprises the N-pole acquisition unit and the S-pole acquisition unit which are respectively and electrically connected with the control chip, and the part for preventing misidentification is arranged on the outer surface of the shell and at the position corresponding to the magnetic induction surface where the N-pole acquisition unit and the S-pole acquisition unit are located.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (10)
1. The utility model provides a controller for magnetism proximity sensor, includes the casing and locates control circuit board in the casing, be equipped with control chip on the control circuit board and with the tongue tube circuit that control chip electricity is connected, a serial communication port, still be equipped with magnetism acquisition circuit on the control circuit board, magnetism acquisition circuit is including N utmost point acquisition unit and the S utmost point acquisition unit that are connected with the control chip electricity respectively, be equipped with the part that is used for preventing the misrecognition on the surface of casing and correspond on the position of the magnetic induction face that N utmost point acquisition unit and S utmost point acquisition unit are located.
2. The controller for a magnetic proximity sensor according to claim 1, wherein the control circuit board is disposed in parallel with the one side surface of the housing, and the N-pole collecting unit and the S-pole collecting unit are disposed corresponding to two end positions of the one side surface of the housing, respectively, and the member is a protrusion disposed at a central position of the one side surface of the housing.
3. A controller for a magnetic proximity sensor according to claim 2, wherein the protrusion is hemispherical in shape.
4. A controller for a magnetic proximity sensor according to claim 3, wherein the radius of the corresponding hemisphere of the protrusion ranges from 2.5mm to 3.5mm.
5. A controller for a magnetic proximity sensor according to claim 4, wherein the radius of the corresponding hemisphere of the protrusion is 3mm.
6. The controller for a magnetic proximity sensor of claim 2 wherein the N-pole and S-pole pick-up units are each located on a side of the control circuit board facing a side of the housing.
7. A controller for a magnetic proximity sensor according to claim 2, wherein a gap between the control circuit board and an inner surface of a side surface of the housing ranges from 1mm to 2mm.
8. The controller for a magnetic proximity sensor of claim 7, wherein a gap between the control circuit board and an inner surface of a side of the housing is 1.5mm.
9. The controller for a magnetic proximity sensor of claim 2 wherein a side of the housing is a non-metallic material.
10. The controller for a magnetic proximity sensor according to claim 2, wherein the housing has a rectangular parallelepiped shape, and one side surface of the housing is a side surface on which a long side of the rectangular parallelepiped is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320275928.5U CN219122599U (en) | 2023-02-21 | 2023-02-21 | Controller for magnetic proximity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320275928.5U CN219122599U (en) | 2023-02-21 | 2023-02-21 | Controller for magnetic proximity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219122599U true CN219122599U (en) | 2023-06-02 |
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ID=86526100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320275928.5U Active CN219122599U (en) | 2023-02-21 | 2023-02-21 | Controller for magnetic proximity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219122599U (en) |
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2023
- 2023-02-21 CN CN202320275928.5U patent/CN219122599U/en active Active
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