Device for switching opening and closing of end cover opening alarm function

Abstract

The utility model provides a device for switching opening and closing of an end cover opening alarm function, which comprises a central processing unit, an end cover opening detection unit and a function opening and closing detection unit, and the input IO port of the central processing unit is connected with the end cover opening detection unit; the detection function opening and closing unit is connected with the end cover opening detection unit; the end cover opening detection unit comprises an end cover opening detection switch; and the output IO port of the central processing unit is connected with the detection function on-off unit so as to output a corresponding level signal under the configuration of the central processing unit and realize the switching between the opening and closing of the end cover opening alarm function. According to the device for switching the opening and closing of the end cover opening alarm function, the opening and closing of the end cover opening alarm function can be switched.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric meters, and particularly relates to a device for switching the opening and closing of the end cover alarm function. Background Technique

[0002] In the prior art, in order to prevent users on site from privately opening the end cover or modifying the wiring method for electricity theft operations, electric meters often add the functions of end cover opening detection alarm and event recording. Generally, as long as the end cover is opened, the electric meter will give an end cover opening alarm and record an event.

[0003] However, in some scenarios, it is reasonable to open the end cover. For example, in the normal installation process of the electric meter on site, the end cover of the electric meter is covered after the installation of the electric meter, and then the electric meter is powered on. However, in actual on-site installation of the electric meter, in order to facilitate testing whether the electric meter is installed in place, the installer may power on the electric meter without covering the meter cover and cover the end cover after confirming the installation. In this case, the electric meter will generate an end cover opening alarm and record an end cover opening event record, which will mislead relevant management personnel at this time. Therefore, the existing electric meters will give an alarm for some accidental touches that do not require an alarm, and the setting of the end cover opening alarm is not flexible enough. Summary of the Invention

[0004] The purpose of the utility model is to provide a device for switching the opening and closing of the end cover alarm function, which is used to solve the problems that the end cover opening alarm in the prior art is not flexible enough and is easily triggered by accidental touches.

[0005] In order to solve the above technical problems, the present application provides a device for switching the opening and closing of the end cover alarm function, which is characterized in that it includes a central processing unit, an end cover detection unit, and a detection function opening and closing unit.

[0006] The input IO port of the central processing unit is connected to the end cover detection unit.

[0007] The detection function opening and closing unit is connected to the end cover detection unit.

[0008] The end cover detection unit includes an end cover detection switch.

[0009] The output IO port of the central processing unit is connected to the detection function opening and closing unit, so as to output a corresponding level signal under the configuration of the central processing unit to realize the switching between the opening and closing of the end cover alarm function.

[0010] Among them, the detection function opening and closing unit is a diode.

[0011] When the detection function opening and closing unit is a diode, the positive electrode of the diode is connected between the input IO port and the start cover detection unit, the negative electrode of the diode is connected to the output IO port, and the start cover detection unit is also respectively connected to the positive power supply and the ground wire.

[0012] In an embodiment of the present invention, a first current limiting resistor is further included;

[0013] The first common connection end is connected to the second common connection end. The first common connection end is the common connection end of the input IO port and the diode, and the second common connection end is the common connection end of the first current limiting resistor and the protection capacitor;

[0014] The positive power supply is further connected to the third common connection end. The third common connection end is the common connection end of the first current limiting resistor and the start cover detection unit.

[0015] In an embodiment of the present invention, a second current limiting resistor is further provided between the start cover detection unit and the positive power supply.

[0016] In an embodiment of the present invention, the detection function opening and closing unit is replaced with a MOS transistor;

[0017] When the detection function opening and closing unit is a MOS transistor, the gate of the MOS transistor is connected to the output IO port, the drain of the MOS transistor is connected to the positive power supply, the source of the MOS transistor is connected to the start cover detection unit, the start cover detection unit is connected to the positive power supply through the MOS transistor, and the start cover detection unit is also connected to the ground wire.

[0018] In an embodiment of the present invention, a third current limiting resistor is further provided between the gate of the MOS transistor and the output IO port.

[0019] In an embodiment of the present invention, a fourth current limiting resistor is further included. The source of the MOS transistor is connected to the start cover detection unit through the fourth current limiting resistor.

[0020] In an embodiment of the present invention, the start cover detection unit further includes a protection capacitor connected in parallel with the start cover detection switch.

[0021] In an embodiment of the present invention, a fifth current limiting resistor is further included;

[0022] The fourth common connection end is connected to the fifth common connection end through the fifth current limiting resistor. The fourth common connection end is the common connection end formed by the MOS transistor and the start cover detection switch, and the fifth common connection end is the common connection end formed by the input IO port and the protection capacitor.

[0023] Compared with the prior art, the device for switching the opening and closing of the start cover alarm function proposed by the present utility model detects the start cover based on the start cover detection unit, and can switch the opening and closing of the start cover alarm function through the detection function opening and closing unit and the IO output port. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0025] Figure 1 It shows a schematic structural diagram of the device for switching the opening and closing of the start cover alarm function described in the embodiment of the present utility model.

[0026] Figure 2 It shows a circuit diagram of the device for switching the opening and closing of the start cover alarm function described in the embodiment of the present utility model when the detection function opening and closing unit is a diode.

[0027] Figure 3 It shows a circuit diagram of the device for switching the opening and closing of the start cover alarm function described in the embodiment of the present utility model when the detection function opening and closing unit is a MOS transistor.

[0028] Description of component labels:

[0029] The MCU is the central processing unit, M1 is the input IO port, M2 is the output IO port, X1 is the diode, C is the protection capacitor, VCC is the positive power supply, GND is the ground wire, K is the start cover detection switch, X2 is the MOS transistor, R1 is the first current-limiting resistor, R2 is the second current-limiting resistor, R3 is the third current-limiting resistor, R4 is the fourth current-limiting resistor, and R5 is the fifth current-limiting resistor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will describe in detail the embodiments of the present utility model in conjunction with the drawings and embodiments, so as to fully understand how the present utility model uses technical means to solve technical problems and achieve the implementation process of technical effects and implement them accordingly. It should be noted that as long as there is no conflict, the various embodiments in the present utility model and the various features in each embodiment can be combined with each other, and the formed technical solutions are all within the protection scope of the present utility model.

[0031] To solve the above technical problems existing in the prior art, the embodiment of the present utility model provides a device for switching the opening and closing of the start cover alarm function.

[0032] Figure 1 It shows a schematic structural diagram of the device for switching the opening and closing of the start cover alarm function described in this embodiment. Refer to Figure 1As shown in the figure, the device for switching the opening and closing of the start cover alarm function provided by the embodiment of the present utility model includes: a central processor, a start cover detection unit, and a detection function opening and closing unit.

[0033] The input IO port of the central processor is connected to the start cover detection unit.

[0034] The detection function opening and closing unit is connected to the start cover detection unit.

[0035] The output IO port of the central processor is connected to the detection function opening and closing unit, so as to output a corresponding level signal under the configuration of the central processor, and realize the switching between the opening and closing of the start cover alarm function.

[0036] In the embodiment of the present utility model, the detection function opening and closing unit can be a diode or a MOS transistor. The start cover detection unit is configured such that when the start cover is operated, a corresponding voltage signal is transmitted to the central processor.

[0037] Figure 2 It shows the circuit diagram of the device for switching the opening and closing of the start cover alarm function described in the embodiment of the present utility model when the detection function opening and closing unit is a diode.

[0038] Reference Figure 2 As shown in the figure, the start cover detection unit includes a start cover detection switch K; the detection function opening and closing unit is a diode X1. When the detection function opening and closing unit is the diode X1, the positive electrode of the diode X1 is connected between the input IO port M1 and the start cover detection unit, and the negative electrode of the diode is connected to the output IO port M2. The start cover detection unit is also respectively connected to the positive power supply VCC and the ground wire GND.

[0039] Figure 2 The principle of the device in the figure is: when the meter cover is closed, the start cover detection switch K will be pressed by the meter cover and be in a closed state. At this time Figure 2 A circuit loop is formed by the positive electrode VCC, the meter switch K to the negative electrode GND; when the meter cover is opened, the start cover detection switch K will bounce up and be in an open state. Figure 2The circuit formed by the positive electrode VCC, the meter switch K to the negative electrode GND is disconnected, and the voltage signal from the positive electrode VCC will flow to the input IO port M1 or the output IO port M2 of the central processing unit MCU through the circuit. Specifically, due to the one-way conductivity of the diode X1, if the output IO port M2 is configured as a low level by the central processing unit MCU, the voltage signal will flow to the output IO port M2, and the input IO port M1 will not receive the voltage signal, and the central processing unit MCU will not record the time of opening the end cover and give an alarm. At this time, the end cover opening alarm function is turned off; if the output IO port M2 is configured as a high level by the central processing unit MCU, the voltage signal will flow to the input IO port M1, and the central processing unit MCU records the time of opening the end cover and gives an alarm. At this time, the end cover opening alarm function is turned on. Therefore, based on the output IO port M2 and the diode X1 of the present invention, the switching of the opening and closing of the end cover opening alarm function can be realized. Those skilled in the art can flexibly set according to the needs based on the device for switching the opening and closing of the end cover opening alarm function provided by the present invention. For example, in the central processing unit MCU, the output IO port M2 is configured to output a low level for a preset duration and then output a high level. Then the preset duration is the time period when the end cover detection alarm is not triggered. Those skilled in the art can also make other reasonable configurations based on the device for switching the opening and closing of the end cover opening alarm function provided by the present invention to realize the switching of the opening and closing of the end cover opening alarm function in some scenarios where the alarm does not need to be triggered.

[0040] Optionally, the end cover detection unit further includes a protection capacitor C connected in parallel with the end cover detection switch K. The protection capacitor C can reduce the current fluctuation in the end cover detection switch K, help to stabilize the circuit, and prevent voltage peaks and fluctuations.

[0041] Optionally, it further includes a first current-limiting resistor R1; the first common connection end is connected to the second common connection end. The first common connection end is the common connection end of the input IO port M1 and the diode X1, and the second common connection end is the common connection end of the first current-limiting resistor R1 and the protection capacitor C; the positive power supply VCC is also connected to the third common connection end. The third common connection end is the common connection end of the first current-limiting resistor R1 and the end cover detection unit. The first current-limiting resistor R1 can limit the current to protect the input IO port M1 and the output IO port M2 of the central processing MCU.

[0042] Optionally, a second current-limiting resistor R2 is further provided between the end cover detection unit and the positive power supply VCC. The function of the second current-limiting resistor R2 is to ensure that the current in the circuit operates within a safe range, thereby protecting other electronic components in the circuit from damage caused by excessive current.

[0043] Figure 3The circuit diagram is shown when the detection function opening and closing unit is a MOS transistor in the device for switching the opening and closing of the start cover alarm function according to the embodiment of the present invention.

[0044] Reference Figure 3 As shown, the device for switching the opening and closing of the start cover alarm function provided by the embodiment of the present invention includes: a central processing unit MCU, a start cover detection unit, and a detection function opening and closing unit.

[0045] The input IO port M1 of the central processing unit MCU is connected to the start cover detection unit.

[0046] The detection function opening and closing unit is connected to the start cover detection unit; the start cover detection unit includes a start cover detection switch K.

[0047] The output IO port M2 of the central processing unit MCU is connected to the detection function opening and closing unit to output a corresponding level signal under the configuration of the central processing unit MCU, so as to realize the switching between the opening and closing of the start cover alarm function.

[0048] The detection function opening and closing unit is a MOS transistor X2; when the detection function opening and closing unit is the MOS transistor X2, the gate of the MOS transistor X2 is connected to the output IO port M2, the drain of the MOS transistor X2 is connected to the positive power supply VCC, the source of the MOS transistor X2 is connected to the start cover detection unit, the start cover detection unit is connected to the positive power supply VCC through the MOS transistor X2, and the start cover detection unit is also connected to the ground wire GND.

[0049] The MOS transistor X2 is a voltage control device, and the direction of the current (voltage signal) can be controlled by the voltage input to the gate. If the output IO port M2 is configured as a low level by the central processing unit MCU, the voltage signal will flow to the output IO port M2, and the input IO port M1 will not receive the voltage signal, and the central processing unit MCU will not record the start cover time and alarm. At this time, the start cover alarm function is turned off; if the output IO port M2 is configured as a high level by the central processing unit MCU, the voltage signal will flow to the input IO port M1, and the central processing unit MCU records the start cover time and alarm. At this time, the start cover alarm function is turned on. Therefore, based on the output IO port M2 and the MOS transistor X2 of the present invention, the switching between the opening and closing of the start cover alarm function can be realized.

[0050] Optionally, a third current limiting resistor R3 is further provided between the gate of the MOS transistor X2 and the output IO port M2. The third current limiting resistor R3 can limit the current, thereby protecting the output IO port M2.

[0051] Optionally, a fourth current limiting resistor R4 is further included, and the source of the MOS transistor X2 is connected to the start cover detection unit through the fourth current limiting resistor R4.

[0052] Optionally, the opening cover detection unit further includes a protection capacitor C connected in parallel with the opening cover detection switch K. The protection capacitor C can reduce the current fluctuation in the opening cover detection switch K, help to stabilize the circuit, and prevent voltage peaks and fluctuations.

[0053] Optionally, the device for switching the opening cover alarm function on and off in this embodiment further includes a fifth current-limiting resistor R5; the fourth common connection end is connected to the fifth common connection end through the fifth current-limiting resistor R5. The fourth common connection end is the common connection end formed by the MOS transistor X2 and the opening cover detection switch K, and the fifth common connection end is the common connection end formed by the input IO port M1 and the protection capacitor C. The fifth current-limiting resistor R5 can further ensure that the current in the circuit operates within a safe range, thereby protecting other electronic components in the circuit from damage caused by excessive current.

[0054] In summary, the device for switching the opening cover alarm function on and off proposed by the present utility model detects the opening cover based on the opening cover detection unit, and can switch the opening and closing of the opening cover alarm function through the detection function on-off unit and the IO output port M2.

[0055] The above embodiments are only illustrative of the principles and effects of the present application, and are not intended to limit the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application should still be covered by the claims of the present application.

Claims

1. A device for switching the open cover alarm function on and off, characterized in that: It includes a central processing unit, an open cover detection unit and a detection function start and close unit. The input IO port of the central processing unit is connected to the open end cover detection unit; The detection function on-off unit is connected to the open end cover detection unit; The open end cover detection unit includes an open end cover detection switch; The output IO port of the central processing unit is connected to the detection function on / off unit to output a corresponding level signal under the configuration of the central processing unit to realize the switching between on and off of the open end cover alarm function; Wherein, the detection function on-off unit is a diode; When the detection function on / off unit is a diode, the anode of the diode is connected between the input IO port and the open end cover detection unit, the cathode of the diode is connected to the output IO port, and the open end cover detection unit is also connected to the positive power supply and the ground wire respectively.

2. The device according to claim 1, characterized in that The open end cover detection unit further includes a protection capacitor connected in parallel with the open end cover detection switch.

3. The device according to claim 2, characterized in that Also includes a first current limiting resistor; A first common connection terminal is connected to a second common connection terminal, the first common connection terminal is a common connection terminal of the input IO port and the diode, and the second common connection terminal is a common connection terminal of the first current limiting resistor and the protection capacitor; The positive power supply is also connected to a third common connection terminal, and the third common connection terminal is a common connection terminal of the first current limiting resistor and the open end cover detection unit.

4. The device according to claim 3, characterized in that A second current limiting resistor is also provided between the open end cover detection unit and the positive power supply.

5. The device according to claim 1, characterized in that The detection function on / off unit is replaced by a MOS tube; When the detection function on-off unit is a MOS tube, the gate of the MOS tube is connected to the output IO port, the drain of the MOS tube is connected to the positive power supply, the source of the MOS tube is connected to the open-end cover detection unit, the open-end cover detection unit is connected to the positive power supply through the MOS tube, and the open-end cover detection unit is also connected to the ground wire.

6. The device according to claim 5, characterized in that A third current limiting resistor is also provided between the gate of the MOS tube and the output IO port.

7. The device according to claim 5, characterized in that It also includes a fourth current limiting resistor, and the source of the MOS tube is connected to the open-end cover detection unit through the fourth current limiting resistor.

8. The device according to claim 5, characterized in that The open end cover detection unit further includes a protection capacitor connected in parallel with the open end cover detection switch.

9. The device according to claim 8, characterized in that Also including a fifth current limiting resistor; The fourth common connection terminal is connected to the fifth common connection terminal through the fifth current limiting resistor, the fourth common connection terminal is the common connection terminal formed by the MOS tube and the open end cover detection switch, and the fifth common connection terminal is the common connection terminal formed by the input IO port and the protection capacitor.

Images