Magnetic field measurement control device

Abstract

The utility model provides a magnetic field measurement control device. The magnetic field measurement control device comprises a magnetic field intensity value acquisition module, a processing module and a control module, the processing module is connected with the magnetic field intensity value acquisition module and the control module. Wherein the magnetic field intensity value acquisition module is used for receiving an acquisition signal sent by the processing module, sensing a magnetic field based on the acquisition signal, obtaining a magnetic field intensity value and sending the magnetic field intensity value to the processing module; the processing module is used for detecting the magnetic field intensity value and sending a corresponding control signal to the control module based on a detection result; and the control module is connected with the rear-end circuit and is used for executing switch closing based on the control signal or executing switch opening based on the control signal. The magnetic field measurement control device provided by the utility model can automatically execute switch-on or switch-off based on the magnetic field intensity value so as to quickly protect rear-end electronic equipment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of magnetic field measurement, especially a kind of magnetic field measurement control device. BACKGROUND

[0002] Magnetic field measurement is of great significance to equipment maintenance and fault diagnosis, for example: in the field of electric energy meter, the current transformer inside electric energy meter detects the size of current using the change of magnetic field, by measuring magnetic field, it can assist calibration current transformer, ensure that electric energy meter can accurately measure and record power consumption etc.

[0003] The existing magnetic field measurement device realizes the induction to magnetic field and obtains the specific value of magnetic field intensity by setting magnetic induction chip.However, the existing magnetic field measurement device usually only has the quantitative measurement function of magnetic field intensity, and when the magnetic field changes abnormally, it will cause the saturation of magnetic material inside electronic equipment under energized state, damage the magnetic element on circuit board, shorten the service life of electronic equipment, increase its maintenance and replacement cost, and the existing magnetic field measurement device still needs operating personnel to manually control switch opening or closing based on magnetic field intensity value, and the protection of electronic equipment is limited.

[0004] Therefore, there is an urgent need for a magnetic field measurement control device that can automatically execute switch opening or closing based on magnetic field intensity value to quickly protect electronic equipment. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a magnetic field measurement control device, to solve the problem that the existing magnetic field measurement device cannot automatically execute switch opening or closing based on magnetic field intensity value, leading to easy damage of electronic equipment when magnetic field changes abnormally.

[0006] To achieve the above-mentioned purpose and other related purposes, the utility model provides a magnetic field measurement control device connected to back-end circuit, comprising: magnetic field intensity value acquisition module, processing module and control module;The processing module is connected with the magnetic field intensity value acquisition module and the control module respectively;Wherein,

[0007] The magnetic field intensity value acquisition module is used for receiving the acquisition signal sent by the processing module, inducting magnetic field based on the acquisition signal, obtaining magnetic field intensity value, and sending the magnetic field intensity value to the processing module;

[0008] The processing module is used for detecting the magnetic field intensity value, and sending corresponding control signal to the control module based on detection result;

[0009] The control module is connected with the rear-end circuit, and is configured to close a switch based on the control signal or open the switch based on the control signal.

[0010] In an embodiment of the utility model, the control module comprises: a first conduction unit, a second conduction unit and a control execution unit; wherein,

[0011] The first end of the first conduction unit is connected with the processing module, the second end of the first conduction unit is connected with the first end of the control execution unit, and the third end of the first conduction unit is grounded; the first end of the second conduction unit is connected with the processing module, the second end of the second conduction unit is connected with the second end of the control execution unit, and the third end of the second conduction unit is grounded; the third end of the control execution unit is electrically connected with the first end of the rear-end circuit, and the fourth end of the control execution unit is electrically connected with the second end of the rear-end circuit.

[0012] In an embodiment of the utility model, the first conduction unit comprises: a first current-limiting resistor, a first voltage-dividing resistor and a first triode; wherein,

[0013] The first end of the first current-limiting resistor is connected with the processing module, and the second end of the first current-limiting resistor is connected with the base of the first triode; the first end of the first voltage-dividing resistor is connected with the first end of the first current-limiting resistor, and the second end of the first voltage-dividing resistor is connected with the emitter of the first triode; the common connection end of the first voltage-dividing resistor and the first triode is grounded; and the collector of the first triode is connected with the first end of the control execution unit.

[0014] In an embodiment of the utility model, the second conduction unit comprises: a second current-limiting resistor, a second voltage-dividing resistor and a second triode; wherein,

[0015] The first end of the second current-limiting resistor is connected with the processing module, and the second end of the second current-limiting resistor is connected with the base of the second triode; the first end of the second voltage-dividing resistor is connected with the first end of the second current-limiting resistor, and the second end of the second voltage-dividing resistor is connected with the emitter of the second triode; the common connection end of the second voltage-dividing resistor and the second triode is grounded; and the collector of the second triode is connected with the second end of the control execution unit.

[0016] In an embodiment of the utility model, the control execution unit comprises: a first power supply end, a second power supply end, an electromagnetic switch, a third current-limiting resistor, a fourth current-limiting resistor, a third triode and a fourth triode; wherein,

[0017] The first end of the electromagnetic switch is connected with the first end of the third current-limiting resistor; the third current-limiting resistor and the common connection end of the electromagnetic switch are connected with the collector of the fourth triode, the second end of the third current-limiting resistor is connected with the base of the fourth triode; the emitter of the fourth triode is connected with the first power supply end, the collector of the fourth triode is connected with the second end of the first conduction unit; the second end of the electromagnetic switch is connected with the first end of the fourth current-limiting resistor; the fourth current-limiting resistor and the common connection end of the electromagnetic switch are connected with the second end of the first conduction unit; the second end of the fourth current-limiting resistor is connected with the base of the fourth triode; the emitter of the fourth triode is connected with the second power supply end, the collector of the fourth triode is connected with the second end of the second conduction unit; the third end of the electromagnetic switch is connected with the first end of the rear-end circuit, and the fourth end of the electromagnetic switch is connected with the second end of the rear-end circuit.

[0018] In an embodiment of the utility model, the control execution unit further includes: a third voltage dividing resistor and a first capacitor; wherein,

[0019] The first end of the first capacitor is connected with the second end of the first conduction unit, and the second end of the first capacitor is connected with the collector of the fourth triode; one end of the third voltage dividing resistor is connected with the first end of the first capacitor, and the other end is connected with the second end of the first capacitor; the third current-limiting resistor and the common connection end of the electromagnetic switch are connected with the second end of the first capacitor, and the fourth current-limiting resistor and the common connection end of the electromagnetic switch are connected with the first end of the first capacitor.

[0020] In an embodiment of the utility model, the first power supply end includes: a first diode, a fifth current-limiting resistor, a fourth voltage dividing resistor and a second capacitor; wherein,

[0021] The positive pole of the first diode is connected with an external DC power supply, the negative pole is connected with the first end of the fifth current-limiting resistor; the second end of the fifth current-limiting resistor is connected with the positive pole of the second capacitor, and the positive pole of the second capacitor is connected with the emitter of the fourth triode; the common connection end of the fifth current-limiting resistor and the second capacitor is connected with the first end of the fourth voltage dividing resistor; the negative pole of the second capacitor is connected with the second end of the fourth voltage dividing resistor and grounded.

[0022] In an embodiment of the utility model, the second power supply end includes: a second diode, a sixth current-limiting resistor, a fifth voltage dividing resistor and a third capacitor; wherein,

[0023] The positive electrode of the second diode is connected with an external DC power supply, the negative electrode is connected with the first end of the sixth current-limiting resistor, the second end of the sixth current-limiting resistor is connected with the positive electrode of the third capacitor, and the positive electrode of the third capacitor is connected with the emitter of the fourth triode; the common connection end of the sixth current-limiting resistor and the third capacitor is connected with the first end of the fifth voltage dividing resistor; the negative electrode of the third capacitor is connected with the second end of the fifth voltage dividing resistor and grounded.

[0024] In an embodiment of the utility model, the magnetic field intensity value acquisition module comprises a 3D magnetic induction chip.

[0025] In an embodiment of the utility model, the device further comprises a display module; the display module is connected with the processing module and is used for displaying the magnetic field intensity value and the current control state of the device on the rear-end circuit.

[0026] Compared with the prior art, the magnetic field measurement control device provided by the utility model has at least the following beneficial effects:

[0027] The main control processing module is connected with the sampling module magnetic field intensity value acquisition module and the protection control module respectively, the magnetic field intensity value is acquired through the sampling module magnetic field intensity value acquisition module, the magnetic field intensity value is sent to the main control processing module, the main control processing module detects the magnetic field intensity value, and based on the detection result, the protection control module is controlled to perform corresponding control actions, so that the rear-end equipment is automatically protected when the magnetic field changes abnormally, and the rear-end equipment damage and power supply interruption are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Fig. 1 shows the overall structure schematic diagram of the magnetic field measurement control device provided by the utility model in an embodiment.

[0029] Figure 2 Fig. 2 shows the specific structure schematic diagram of the magnetic field measurement control device provided by the utility model in an embodiment.

[0030] Figure 3 Fig. 3 shows the unit structure schematic diagram of the magnetic field measurement control device provided by the utility model in another embodiment.

[0031] Figure 4 Fig. 4 shows the structure schematic diagram of the first power supply end in the magnetic field measurement control device provided by the utility model in an embodiment.

[0032] EXPLANATION OF DRAWINGS

[0033] 1, magnetic field strength value acquisition module; 2, processing module; 3, control module; 31, first conduction unit; 32, second conduction unit; 33, control execution unit; A, back-end circuit; B, external DC power supply; GND, ground; VCC_L, first power supply end; VCC_R, second power supply end; R1, first current limiting resistor; R2, first voltage dividing resistor; R3, second current limiting resistor; R4, second voltage dividing resistor; R5, third current limiting resistor; R6, fourth current limiting resistor; R7, third voltage dividing resistor; R8, fifth current limiting resistor; R9, fourth voltage dividing resistor; Q1, first triode; Q2, second triode; Q3, third triode; Q4, fourth triode; C1, first capacitor; C2, second capacitor; D1, first diode; K, electromagnetic switch; K1, first end of electromagnetic switch; K2, second end of electromagnetic switch; K3, third end of electromagnetic switch; K4, fourth end of electromagnetic switch. DETAILED DESCRIPTION

[0034] The implementation manner of the present application is described below through specific examples. Other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the present specification. The present application can also be implemented or applied through other different specific implementation manners, and each detail in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0035] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the present specification to enable those skilled in the art to understand and read, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for the convenience of clear description, and are not used to limit the scope of the implementation of the present application. The change or adjustment of the relative relationship without substantially changing the technical content is also considered as the implementation scope of the present application.

[0036] The embodiments of the present application will be described in detail below with reference to the drawings. In the case of no conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0037] The utility model provides a kind of magnetic field measurement control device, by being connected sampling module magnetic field intensity value acquisition module and protection control module of main control processing module respectively, by the sampling module magnetic field intensity value acquisition module obtains magnetic field intensity value, the magnetic field intensity value is sent to the main control processing module, for the main control processing module detects the magnetic field intensity value, based on detection result control the protection control module executes corresponding control action, realizes when magnetic field changes abnormally, automatically protects back-end electronic equipment, avoids back-end electronic equipment damage and power supply interruption.

[0038] Please refer to Figure 1 , it shows the overall structure schematic diagram of a kind of magnetic field measurement control device in the embodiment provided by the utility model;

[0039] As Figure 1 shown, the magnetic field measurement control device is connected with back-end circuit A, and the magnetic field measurement control device includes: magnetic field intensity value acquisition module 1, processing module 2 and control module 3;The processing module 2 is connected with the magnetic field intensity value acquisition module 1 and the control module 3 respectively;Wherein,

[0040] The magnetic field intensity value acquisition module 1 is used for receiving the acquisition signal sent by the processing module 2, inducting magnetic field based on the acquisition signal, obtaining magnetic field intensity value, and sending the magnetic field intensity value to the processing module 2.

[0041] The processing module 2 is used for processing the magnetic field intensity value to obtain a control signal, and sending the control signal to the control module 3.

[0042] The control module 3 is connected with the back-end circuit A, and is used for closing the switch based on the control signal to supply power to the back-end circuit A, or disconnecting the switch based on the control signal to disconnect the power supply to the back-end circuit A.

[0043] Specifically, the processing module 2 sends an acquisition signal to the magnetic field intensity value acquisition module 1, the magnetic field intensity value acquisition module 1 receives the acquisition signal, inductes the magnetic field, obtains the magnetic field intensity value, and sends the magnetic field intensity value to the processing module 2. The processing module 2 judges whether the magnetic field intensity value exceeds the preset magnetic field intensity threshold value. If yes, the processing module 2 sends a disconnect signal to the control module 3, and the control module 3 receives the disconnect signal and disconnects the switch to disconnect the power supply to the back-end circuit A. If not, the processing module 2 sends a closing signal to the control module 3, and the control module 3 receives the closing signal and closes the switch to supply power to the back-end circuit A.

[0044] Optionally, the magnetic field intensity value acquisition module 1 comprises a magnetic induction chip; and the magnetic induction chip is exemplarily a TCS20DLR; and the magnetic induction chip is preferably a 3D magnetic induction chip; and the 3D magnetic induction chip is exemplarily a TLV493D-A1B6.

[0045] It should be noted that the conventional magnetic induction chip can only detect the intensity of the magnetic field in a certain spatial dimension, i.e. the magnetic field needs to be located in a specific detection direction of the chip, so as to induct the magnetic field and obtain the magnetic field intensity value; while the 3D magnetic induction chip can detect the intensity of the magnetic field in three spatial dimensions (X, Y, Z axes), obtain the intensity values of the magnetic field in the three spatial dimensions, and has a full-range detection capability; and when the magnetic field intensity value acquisition module 1 is a 3D magnetic induction chip, the magnetic field intensity value acquisition module 1 sends the magnetic field intensity values in the three spatial dimensions to the processing module 2; when the magnetic field intensity value in any dimension is greater than a preset magnetic field intensity threshold value, the processing module 2 controls the control module 3 to perform switch opening; and when the magnetic field intensity values in all dimensions are all less than the preset magnetic field intensity threshold value, the processing module 2 controls the control module 3 to perform switch closing, so as to improve the accuracy of the device in controlling the rear-end circuit A, and the device performs switch opening of the rear-end circuit A based on the magnetic field intensity value in any spatial dimension, so as to avoid damage of the rear-end circuit A caused by the influence of the magnetic field in other spatial dimensions.

[0046] Optionally, the processing module 2 comprises a microprocessor such as an MCU.

[0047] In an embodiment, the processing module 2 has an SCL interface and an SDL interface; the processing module 2 is connected with the magnetic field intensity value acquisition module 1 through the SCL interface, and sends an acquisition signal to the magnetic field intensity value acquisition module 1; and the processing module 2 is connected with the magnetic field intensity value acquisition module 1 through the SDL interface, and obtains the magnetic field intensity value detected by the magnetic field intensity value acquisition module 1.

[0048] Optionally, the magnetic field measurement control device further comprises a display module; the display module is connected with the processing module 2, and is used for displaying the magnetic field intensity value and the current control state of the device; and the control state comprises a switch opening state or a switch closing state.

[0049] Optionally, the display module is a liquid crystal display screen.

[0050] Please refer to Figure 2 , which is a specific structural schematic diagram of the magnetic field measurement control device in an embodiment of the present application;

[0051] As Figure 2As shown, in the embodiment, the control module 3 comprises a first conduction unit 31, a second conduction unit 32 and a control execution unit 33.

[0052] The first end of the first conduction unit 31 is connected with the processing module 2, the second end of the first conduction unit 31 is connected with the first end of the control execution unit 33, and the third end of the first conduction unit 31 is grounded. The first end of the second conduction unit 32 is connected with the processing module 2, the second end of the second conduction unit 32 is connected with the second end of the control execution unit 33, and the third end of the second conduction unit 32 is grounded. The third end of the control execution unit 33 is electrically connected with the first end of the back-end circuit A, and the fourth end of the control execution unit 33 is electrically connected with the second end of the back-end circuit A.

[0053] Specifically, the processing module 2 sends an acquisition signal to the magnetic field strength value acquisition module 1. After receiving the acquisition signal, the magnetic field strength value acquisition module 1 inducts the magnetic field to obtain the magnetic field strength value, and sends the magnetic field strength value to the processing module 2. The processing module 2 judges whether the magnetic field strength value exceeds a preset magnetic field strength threshold value. If not, the processing module 2 sends a control signal to the first conduction unit 31. After receiving the control signal, the first conduction unit 31 performs a current conduction action based on the control signal. The current conduction action of the first conduction unit 31 triggers the control execution unit 33 to perform switch closing, so that the back-end circuit A and the control execution unit 33 form a closed current loop, and the back-end circuit A operates normally. If yes, the processing module 2 sends a control signal to the second conduction unit 32. After receiving the control signal, the second conduction unit 32 performs a current conduction action based on the control signal. The current conduction action of the second conduction unit 32 triggers the control execution unit 33 to perform switch opening, so as to disconnect the closed current loop between the back-end circuit A and the control execution unit 33, and stop the operation of the back-end circuit A.

[0054] Optionally, the first conduction unit 31 comprises a first current limiting resistor R1, a first voltage dividing resistor R2 and a first triode Q1.

[0055] The first end of the first current limiting resistor R1 is connected with the processing module 2, and the second end of the first current limiting resistor R1 is connected with the base of the first triode Q1. The first end of the first voltage dividing resistor R2 is connected with the first end of the first current limiting resistor R1, and the second end of the first voltage dividing resistor R2 is connected with the emitter of the first triode Q1. The common connection end of the first voltage dividing resistor R2 and the first triode Q1 is grounded. The collector of the first triode Q1 is connected with the first end of the control execution unit 33.

[0056] Optionally, the second conducting unit 32 comprises a second current-limiting resistor R3, a second voltage-dividing resistor R4 and a second triode Q2; wherein,

[0057] The first end of the second current-limiting resistor R3 is connected with the processing module 2, and the second end of the second current-limiting resistor R3 is connected with the base of the second triode Q2; the first end of the second voltage-dividing resistor R4 is connected with the first end of the second current-limiting resistor R3, and the second end of the second voltage-dividing resistor R4 is connected with the emitter of the second triode Q2; the common connection end of the second voltage-dividing resistor R4 and the second triode Q2 is grounded; and the collector of the second triode Q2 is connected with the second end of the control execution unit 33.

[0058] Optionally, the control execution unit 33 comprises a first power supply end VCC_L, a second power supply end VCC_R, an electromagnetic switch K, a third current-limiting resistor R5, a fourth current-limiting resistor R6, a third triode Q3 and a fourth triode Q4; wherein,

[0059] The first end K1 of the electromagnetic switch K is connected with the first end of the third current-limiting resistor R5; the common connection end of the third current-limiting resistor R5 and the electromagnetic switch K is connected with the collector of the fourth triode Q4, and the second end of the third current-limiting resistor R5 is connected with the base of the third triode Q3; the emitter of the third triode Q3 is connected with the first power supply end VCC_L, and the collector of the third triode Q3 is connected with the collector of the first triode Q1; the second end K2 of the electromagnetic switch K is connected with the first end of the fourth current-limiting resistor R6; the common connection end of the fourth current-limiting resistor R6 and the electromagnetic switch K is connected with the collector of the first triode Q1; the second end of the fourth current-limiting resistor R6 is connected with the base of the fourth triode Q4; the emitter of the fourth triode Q4 is connected with the second power supply end VCC_R, and the collector of the fourth triode Q4 is connected with the collector of the second triode Q2; the third end K3 of the electromagnetic switch K is electrically connected with the first end of the rear-end circuit A, and the fourth end K4 of the electromagnetic switch K is electrically connected with the second end of the rear-end circuit A.

[0060] In the embodiment, when the magnetic field intensity value is less than the preset magnetic field intensity threshold value, the processing module 2 sends a high-level signal to the first end of the first current-limiting resistor R3 to turn on the collector and the emitter of the first triode Q2, at this time, the current of the second power supply end VCC_R is turned on, and the fourth triode Q4, the electromagnetic switch K and the first triode form a loop as shown in the figure. Figure 2The current loop shown, the electromagnetic switch K in the induction magnetic field, attract the electromagnetic switch K in the switch closing;

[0061] When the magnetic field intensity value is greater than the preset magnetic field intensity threshold value, the processing module 2 sends a high level signal to the first end of the second current limiting resistor R3, to turn on the collector and emitter of the second triode Q2, at this time, the current of the first power supply end VCC_L is turned on, the fourth triode Q4, the electromagnetic switch K and the first triode form as Figure 2 The current loop shown, the electromagnetic switch K in the induction magnetic field, attract the electromagnetic switch K in the switch closing.

[0062] Optionally, please refer to Figure 3 , show as the magnetic field measurement control device in another embodiment of the unit structure diagram; as Figure 3 As shown, the control execution unit 33 also includes: the third voltage dividing resistor R7 and the first capacitor C1;

[0063] The first end of the first capacitor C1 is connected with the collector of the first triode Q1, and the second end of the first capacitor C1 is connected with the collector of the fourth triode; one end of the third voltage dividing resistor R7 is connected with the first end of the first capacitor C1, and the other end is connected with the second end of the first capacitor C1; the third current limiting resistor R5 and the common connection end of the electromagnetic switch K are connected with the second end of the first capacitor C1, and the fourth current limiting resistor R6 and the common connection end of the electromagnetic switch K are connected with the first end of the first capacitor C1.

[0064] It should be noted that when the electromagnetic switch K is closed, instantaneous voltage glitch and voltage spike will be generated, which will cause the voltage in the circuit to rise sharply in a short time, exceeding the normal working voltage range; in this embodiment, by setting the capacitor C1, the voltage glitch and the voltage spike generated when the electromagnetic switch K is closed can be absorbed, so as to control the circuit and electronic equipment from being damaged by voltage transient and spike; and by setting the third voltage dividing resistor R7 connected in parallel with the first capacitor C1, the voltage absorbed in the first capacitor C1 is released smoothly, avoiding the arc or high energy electromagnetic pulse generated when the first capacitor C1 is discharged quickly, which causes damage to other elements in the circuit.

[0065] Optionally, please refer to Figure 4 , show as the first power supply end VCC_L structure diagram;

[0066] As Figure 4As shown, the first power supply end VCC_L comprises: a first diode D1, a fifth current-limiting resistor R8, a fourth voltage-dividing resistor R9 and a second capacitor C2; wherein,

[0067] The anode of the first diode D1 is connected with an external DC power supply B, the cathode is connected with a first end of the fifth current-limiting resistor R8, a second end of the fifth current-limiting resistor R8 is connected with the anode of the second capacitor C2, and the anode of the second capacitor C2 is connected with the emitter of the third triode Q3; a common connection end of the fifth current-limiting resistor R8 and the second capacitor C2 is connected with a first end of the fourth voltage-dividing resistor R9; the cathode of the second capacitor C2 is connected with a second end of the fourth voltage-dividing resistor R9 and grounded.

[0068] Optionally, the capacitor C2 is a super capacitor;

[0069] Optionally, the second power supply end VCC_R comprises: a second diode, a sixth current-limiting resistor, a fifth voltage-dividing resistor and a third capacitor; the anode of the second diode is connected with an external DC power supply, the cathode is connected with a first end of the sixth current-limiting resistor; a second end of the sixth current-limiting resistor is connected with the anode of the third capacitor, and the anode of the third capacitor is connected with the emitter of the fourth triode; a common connection end of the sixth current-limiting resistor and the third capacitor is connected with a first end of the fifth voltage-dividing resistor; the cathode of the third capacitor is connected with a second end of the fifth voltage-dividing resistor and grounded.

[0070] In the embodiment, when the external DC power supply B is in a normal operating state, the external DC power supply B is taken as the power supply end of the first power supply end VCC_L, and the external DC power supply B charges the second capacitor C2; when the external DC power supply B is in a fault state, the second capacitor C2 is taken as the power supply end of the first power supply end VCC_L, so that the second capacitor C2 is taken as an emergency power supply when the external DC power supply B is in a fault state, the normal operation of the control module 3 is guaranteed, and the stability of the device in controlling the rear-end circuit A is improved.

[0071] In summary, the magnetic field measurement control device provided by the utility model, through setting processing module respectively connecting magnetic field intensity value acquisition module and control module, through the magnetic field intensity value acquisition module obtains the magnetic field intensity value, sends the magnetic field intensity value to the processing module, so that the processing module detects the magnetic field intensity value, controls the control module to execute corresponding control action based on the detection result, realizes automatic protection of rear-end electronic equipment when the magnetic field changes abnormally, avoids damage of rear-end electronic equipment and interruption of power supply. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0072] The above embodiments are only illustrative of the principles of the present application and their effects, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A magnetic field measurement and control device, characterized in that, The device is connected to a back-end circuit and includes: a magnetic field strength value acquisition module, a processing module, and a control module; the processing module is connected to both the magnetic field strength value acquisition module and the control module; wherein... The magnetic field strength value acquisition module is used to receive the acquisition signal sent by the processing module, sense the magnetic field based on the acquisition signal, obtain the magnetic field strength value, and send the magnetic field strength value to the processing module. The processing module is used to detect the magnetic field strength value and send a corresponding control signal to the control module based on the detection result. The control module is connected to the back-end circuit and is used to close the switch based on the control signal, or to open the switch based on the control signal.

2. The apparatus according to claim 1, characterized in that, The control module includes: a first conduction unit, a second conduction unit, and a control execution unit; wherein... The first terminal of the first conducting unit is connected to the processing module, the second terminal of the first conducting unit is connected to the first terminal of the control execution unit, and the third terminal of the first conducting unit is grounded; the first terminal of the second conducting unit is connected to the processing module, the second terminal of the second conducting unit is connected to the second terminal of the control execution unit, and the third terminal of the second conducting unit is grounded; the third terminal of the control execution unit is electrically connected to the first terminal of the back-end circuit, and the fourth terminal of the control execution unit is electrically connected to the second terminal of the back-end circuit.

3. The apparatus according to claim 2, characterized in that, The first conducting unit includes: a first current-limiting resistor, a first voltage-dividing resistor, and a first transistor; wherein, The first end of the first current-limiting resistor is connected to the processing module, and the second end of the first current-limiting resistor is connected to the base of the first transistor; the first end of the first voltage-dividing resistor is connected to the first end of the first current-limiting resistor, and the second end of the first voltage-dividing resistor is connected to the emitter of the first transistor; the common connection terminal of the first voltage-dividing resistor and the first transistor is grounded; the collector of the first transistor is connected to the first end of the control execution unit.

4. The apparatus according to claim 2, characterized in that, The second conducting unit includes: a second current-limiting resistor, a second voltage-dividing resistor, and a second transistor; wherein, The first end of the second current-limiting resistor is connected to the processing module, and the second end of the second current-limiting resistor is connected to the base of the second transistor; the first end of the second voltage-dividing resistor is connected to the first end of the second current-limiting resistor, and the second end of the second voltage-dividing resistor is connected to the emitter of the second transistor; the common connection terminal of the second voltage-dividing resistor and the second transistor is grounded; the collector of the second transistor is connected to the second end of the control execution unit.

5. The apparatus according to claim 2, characterized in that, The control execution unit includes: a first power supply terminal, a second power supply terminal, an electromagnetic switch, a third current-limiting resistor, a fourth current-limiting resistor, a third transistor, and a fourth transistor; wherein, The first terminal of the electromagnetic switch is connected to the first terminal of the third current-limiting resistor; the common connection terminal of the third current-limiting resistor and the electromagnetic switch is connected to the collector of the fourth transistor, and the second terminal of the third current-limiting resistor is connected to the base of the third transistor; the emitter of the third transistor is connected to the first power supply terminal, and the collector of the third transistor is connected to the second terminal of the first conduction unit; the second terminal of the electromagnetic switch is connected to the first terminal of the fourth current-limiting resistor; the common connection terminal of the fourth current-limiting resistor and the electromagnetic switch is connected to the second terminal of the first conduction unit; the second terminal of the fourth current-limiting resistor is connected to the base of the fourth transistor; the emitter of the fourth transistor is connected to the second power supply terminal, and the collector of the fourth transistor is connected to the second terminal of the second conduction unit; the third terminal of the electromagnetic switch is connected to the first terminal of the back-end circuit, and the fourth terminal of the electromagnetic switch is connected to the second terminal of the back-end circuit.

6. The apparatus according to claim 5, characterized in that, The control execution unit further includes: a third voltage divider resistor and a first capacitor; wherein... The first terminal of the first capacitor is connected to the second terminal of the first conducting unit, and the second terminal of the first capacitor is connected to the collector of the fourth transistor; one end of the third voltage divider resistor is connected to the first terminal of the first capacitor, and the other end is connected to the second terminal of the first capacitor; the common connection terminal of the third current limiting resistor and the electromagnetic switch is connected to the second terminal of the first capacitor, and the common connection terminal of the fourth current limiting resistor and the electromagnetic switch is connected to the first terminal of the first capacitor.

7. The apparatus according to claim 5, characterized in that, The first power supply terminal includes: a first diode, a fifth current-limiting resistor, a fourth voltage-dividing resistor, and a second capacitor; wherein, The positive terminal of the first diode is connected to an external DC power supply, and the negative terminal is connected to the first end of the fifth current-limiting resistor; the second end of the fifth current-limiting resistor is connected to the positive terminal of the second capacitor, and the positive terminal of the second capacitor is connected to the emitter of the third transistor; the common connection terminal of the fifth current-limiting resistor and the second capacitor is connected to the first end of the fourth voltage-dividing resistor; the negative terminal of the second capacitor is connected to the second end of the fourth voltage-dividing resistor and grounded.

8. The apparatus according to claim 5, characterized in that, The second power supply terminal includes: a second diode, a sixth current-limiting resistor, a fifth voltage-dividing resistor, and a third capacitor; wherein, The positive terminal of the second diode is connected to an external DC power supply, and the negative terminal is connected to the first end of the sixth current-limiting resistor; the second end of the sixth current-limiting resistor is connected to the positive terminal of the third capacitor, and the positive terminal of the third capacitor is connected to the emitter of the fourth transistor; the common connection terminal of the sixth current-limiting resistor and the third capacitor is connected to the first end of the fifth voltage-dividing resistor; the negative terminal of the third capacitor is connected to the second end of the fifth voltage-dividing resistor and grounded.

9. The apparatus according to claim 1, characterized in that, The magnetic field strength acquisition module includes a 3D magnetic induction chip.

10. The apparatus according to claim 1, characterized in that, The device further includes a display module; the display module is connected to the processing module and is used to display the magnetic field strength value and the current control status of the device on the back-end circuit.

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