Electric quantity detection circuit, circuit mainboard and intelligent lock

Abstract

The utility model provides an electric quantity detection circuit, a circuit mainboard and an intelligent lock. The electric quantity detection circuit comprises a switch module and a power supply voltage detection module, wherein the switch module comprises a switch driving end and a switch signal end; the power supply voltage detection module comprises a driving end, an input end and an output end; the input end of the power voltage detection module is connected with a power supply for inputting a power voltage signal; the output end of the power supply voltage detection module is connected to the main controller; the switch driving end of the switch module is used for receiving an electric quantity detection control signal and controlling the working state of the switch module through the electric quantity detection control signal; the switch signal end of the switch module is connected with the driving end of the power supply voltage detection module, and is used for driving the power supply voltage detection module to output a power supply voltage detection signal to the main controller. The power supply voltage detection module can be started when the electric quantity detection control signal is received, so that the power supply voltage detection module does not need to be started all the time, and the technical effect of reducing the power consumption of the electric quantity detection circuit is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field, and particularly to a power detection circuit, a circuit main board and an intelligent lock. Background Art

[0002] In order to obtain the power consumption monitoring result of an electrical device, it is necessary to add a power detection circuit to the circuit of the electrical device. The power detection circuit is a circuit module for detecting the power supply of the electrical device. In the prior art, the power detection circuit of the electrical device needs to be in a working state all the time so that the user can obtain the power detection result of the electrical device at any time. However, the power detection circuit that is always in a working state will increase the power consumption of the electrical device and cause waste of electric energy resources. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies in the prior art, and provide a power detection circuit, a circuit main board and an intelligent lock, which can start the power voltage detection module when receiving the power detection control signal, and close the power voltage detection module when not receiving the power detection control signal, without always starting the power voltage detection module, and can reduce the power consumption of the power detection circuit.

[0004] The first embodiment of the utility model provides a power detection circuit, including: a switch module and a power voltage detection module; wherein, the switch module includes a switch driving end and a switch signal end; the power voltage detection module includes a driving end, an input end and an output end;

[0005] The input end of the power voltage detection module is connected to the power supply for inputting a power voltage signal; the output end of the power voltage detection module is connected to the main controller;

[0006] The switch driving end of the switch module is used for receiving the power detection control signal to control the working state of the switch module through the power detection control signal; the switch signal end of the switch module is connected to the driving end of the power voltage detection module for driving the power voltage detection module to output a power voltage detection signal to the main controller.

[0007] The second embodiment of the utility model provides a circuit main board, including the power detection circuit as described above.

[0008] The third embodiment of the utility model provides an intelligent lock, including a lock body, and the power detection circuit as described above, or the circuit main board as described above; the power detection circuit or the circuit main board is arranged in the lock body

[0009] Compared with the prior art, the utility model includes a switch module and a power supply voltage detection module. Among them, when the switch module receives a power detection control signal, it drives the power supply voltage detection module to conduct, so as to output a power supply voltage detection signal to the main controller, enabling the main controller to sample the power of the power supply; when the switch module does not receive a power detection control signal, it drives the power supply voltage detection module to close, so as to stop the operation of the power supply voltage detection module, prevent power consumption caused by the operation of the power supply voltage detection module, can start the power supply voltage detection module when receiving a power detection control signal, and close the power supply voltage detection module when not receiving a power detection control signal, without continuously starting the power supply voltage detection module, achieving the technical effect of reducing the power consumption of the power detection circuit.

[0010] In order to understand the utility model more clearly, the following will describe the specific implementation manners of the present invention in conjunction with the accompanying drawings. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the module connection of the power detection circuit according to an embodiment of the utility model.

[0012] Figure 2 It is a schematic diagram of the circuit connection of the power detection circuit according to an embodiment of the utility model.

[0013] Figure 3 It is a schematic diagram of the circuit main board according to an embodiment of the utility model.

[0014] Figure 4 It is a schematic diagram of an intelligent lock according to an embodiment of the utility model.

[0015] 100. Power detection circuit; 101. Switch module; Q2. Second switching tube; R6. First resistor; R9. Second resistor; R12. Third resistor; R8. Fourth resistor; R10. Fifth resistor; R14. Sixth resistor; 103. Power supply voltage detection module; Q1. First switching tube; 105. Filtering component; C8. Filtering capacitor; 10. Circuit main board; 1. Intelligent lock. Detailed Description of the Preferred Embodiments

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1, which is a schematic diagram of the module connection of the power detection circuit 100 according to an embodiment of the present utility model. The power detection circuit 100 can reduce its power consumption. The power detection circuit 100 includes:

[0018] A switch module 101 and a power supply voltage detection module 103; wherein, the switch module 101 includes a switch driving end and a switch signal end; the power supply voltage detection module 103 includes a driving end, an input end, and an output end;

[0019] The input end of the power supply voltage detection module 103 is connected to the power supply for inputting a power supply voltage signal; the output end of the power supply voltage detection module 103 is connected to the main controller;

[0020] The switch driving end of the switch module 101 is used to receive a power detection control signal, and control the working state of the switch module 101 through the power detection control signal; the switch signal end of the switch module 101 is connected to the driving end of the power supply voltage detection module 103, and is used to drive the power supply voltage detection module 103 to output a power supply voltage detection signal to the main controller.

[0021] When the switch driving end of the switch module 101 receives a power detection control signal, the switch signal end of the switch module 101 outputs a conduction signal to the driving end of the power supply voltage detection module 103, the power supply voltage detection module 103 conducts, and the power supply outputs a power supply voltage detection signal through the output end of the power supply voltage detection module 103.

[0022] Among them, the switch module 101 can be a switching tube that conducts according to a power detection control signal, or a circuit module including a switching tube that conducts according to a power detection control signal. The power detection control signal can be sent from a switch control circuit connected to the power supply to the switch module 101. The switch control circuit refers to a circuit or chip connected to the power supply that conducts in response to the triggering of a function key.

[0023] The power supply voltage detection module 103 can be a switching tube that conducts according to a conduction signal, or a circuit module including a switching tube that conducts according to a conduction signal.

[0024] The switching tubes designed for the switch module 101 and the power supply voltage detection module 103 can be common electronic components such as triodes and MOS tubes that are used to switch between conduction and disconnection states according to signals and act as switches.

[0025] Compared with the prior art, the utility model includes a switch module 101 and a power supply voltage detection module 103. Among them, when the switch module 101 receives a power quantity detection control signal, it drives the power supply voltage detection module 103 to conduct, so as to output a power supply voltage detection signal to the main controller, enabling the main controller to sample the power quantity of the power supply; when the switch module 101 does not receive a power quantity detection control signal, it drives the power supply voltage detection module 103 to close, so as to stop the operation of the power supply voltage detection module 103, prevent power consumption caused by the operation of the power supply voltage detection module 103, can start the power supply voltage detection module 103 when receiving a power quantity detection control signal, and close the power supply voltage detection module 103 when not receiving a power quantity detection control signal, without continuously starting the power supply voltage detection module 103, achieving the technical effect of reducing the power consumption of the power quantity detection circuit 100.

[0026] Please refer to Figure 2 , in a feasible embodiment, the power supply voltage detection module includes a first switching tube, a first resistor, and a voltage dividing circuit;

[0027] The first switching tube includes a first driving end, a first signal end, and a second signal end; the driving end of the first switching tube is connected to one end of the first resistor, the other end of the first resistor is the driving end of the power supply voltage detection module, the first signal end of the first switching tube is the input end of the power supply voltage detection module, the second signal end of the first switching tube is connected to the input end of the voltage dividing circuit, and the output end of the voltage dividing circuit is the output end of the power supply voltage detection module.

[0028] In this embodiment, a potential difference can be provided for the first switching tube Q1 through the first resistor R6, so that the first switching tube Q1 is conducted under the drive of the conducting switch module, enabling the power supply to be connected to the voltage dividing circuit through the first switching tube Q1, and enabling the main controller to sample the power quantity of the power supply through the voltage dividing circuit.

[0029] In a feasible embodiment, the voltage dividing circuit includes a second resistor R9 and a third resistor R12. The second signal end of the first switching tube Q1 is successively grounded through the second resistor R9 and the third resistor R12, and the connection between the third resistor R12 and one end of the second resistor R9 is the output end of the power supply voltage detection module 103.

[0030] In this embodiment, the second resistor R9 can be used for current limiting and the third resistor R12 for voltage division to safely and accurately output the power supply voltage detection signal of the power supply, enabling the main controller to sample the power quantity of the power supply.

[0031] In a feasible embodiment, it further includes a filtering component 105, and the filtering component 105 is connected in parallel across both ends of the third resistor R12.

[0032] Among them, the filtering component 105 is a filtering capacitor C8, and the filtering capacitor C8 is connected across both ends of the third resistor R12.

[0033] Specifically, the filtering capacitor C8 and the third resistor R12 can form an RC parallel filtering circuit for filtering the output of the power supply to improve the accuracy of the obtained power supply voltage detection signal. Moreover, since the filtering component 105 is not directly connected to the power supply but is connected to the power supply via the second resistor R9 and the first switching transistor Q1, the filtering component 105 only plays a filtering role when the first switching transistor Q1 is turned on, and will not affect the power of the power supply by playing a filtering role when the first switching transistor Q1 is turned off.

[0034] In this embodiment, the accuracy of the obtained power supply voltage detection signal can be improved by the filtering capacitor C8 of the filtering component 105.

[0035] In a feasible embodiment, the switching module 101 includes a second switching transistor Q2 and a fourth resistor R8;

[0036] The second switching transistor Q2 includes a second driving end, a third signal end, and a fourth signal end; the second driving end of the second switching transistor Q2 is the switching driving end of the switching module; the third signal end of the second switching transistor Q2 is connected to the fourth resistor R8 and then used as the first switching signal end of the switching module 101; the fourth signal end of the second switching transistor Q2 is the second switching signal end of the switching module.

[0037] When the driving end of the second switching transistor Q2 receives a power detection control signal, the second switching transistor Q2 is turned on, and the first signal end of the second switching transistor Q2 is grounded via the second signal end of the second switching transistor Q2, so that the driving end of the first switching transistor Q1 is grounded via the first signal end of the second switching transistor Q2. Therefore, the driving end of the first switching transistor Q1 obtains a low-level signal, and the first switching transistor Q1 is turned on.

[0038] Specifically, the second switching transistor Q2 can be an NPN transistor. When the user needs to perform a power detection, only a high-level power detection control signal needs to be input to the second switching transistor Q2 to turn on the second switching transistor Q2, and the driving end of the first switching transistor Q1 will be grounded via the second switching transistor Q2. At this time, the input level of the driving end of the first switching transistor Q1 is low level, that is, the conduction signal provided by the second switching transistor Q2 for the first switching transistor Q1 is a low-level signal, thereby turning on the first switching transistor Q1. Moreover, since the first switching transistor Q1 is controlled by the second switching transistor Q2, the power detection control signal input to the driving end of the second switching transistor Q2 can be less than the voltage of the power supply, achieving the effect of controlling a large power with a small power.

[0039] Among them, when the second switching transistor Q2 is turned on, the fourth resistor R8 can prevent the driving end of the first switching transistor Q1 from being directly grounded, thereby raising the voltage of the driving end of the first switching transistor Q1 and enabling the first switching transistor Q1 to be turned on smoothly.

[0040] In this embodiment, by making the driving end of the first switching transistor Q1 grounded via the fourth resistor R8 and the second switching transistor Q2 through the second switching transistor Q2, the switching state of the first switching transistor Q1 can be safely controlled.

[0041] In a feasible embodiment, the switching module 101 further includes a fifth resistor R10 and a sixth resistor R14. The second driving end of the second switching transistor Q2 is connected to the fifth resistor R10 and then serves as the switching driving end of the switching module 101; the second driving end of the second switching transistor Q2 is connected to one end of the sixth resistor R14, and the other end of the sixth resistor R14 is grounded.

[0042] Among them, the fifth resistor R10 is used to limit the current input to the driving end of the second switching transistor Q2, playing a current-limiting role to protect the second switching transistor Q2. The sixth resistor R14 can divert the current to the ground, playing a current-splitting role to protect the second switching transistor.

[0043] In this embodiment, through the current-limiting effect of the fifth resistor R10 and the current-splitting effect of the sixth resistor R14, the electrical safety of the second switching transistor Q2 can be protected from two aspects of current limiting and current splitting.

[0044] Please refer to Figure 3 , the second embodiment of the present application provides a circuit board 10, including the power detection circuit 100 as described above.

[0045] Among them, the main controller can be an electronic component of an integrated circuit type such as a main controller or a chip for driving the power detection circuit 100.

[0046] It should be noted that the circuit board 10 provided in the second embodiment of the present application and the power detection circuit 100 of the first embodiment of the present application belong to the same concept. The implementation process is shown in detail in the first embodiment and will not be repeated here.

[0047] In a feasible embodiment, the circuit board 10 further includes a main controller, and the main controller is connected to the switching driving end of the switching module of the power detection circuit.

[0048] Among them, the main controller is used to send a power detection control signal to the power detection circuit to drive the power detection circuit to sample the power supply power.

[0049] Please refer to Figure 4, the third embodiment of the present application provides an intelligent lock 1, including a lock body, and the power detection circuit 100 or the circuit main board 10 as described above; the power detection circuit 100 or the circuit main board 10 is disposed within the lock body.

[0050] It should be noted that the intelligent lock 1 provided in the third embodiment of the present application and the power detection circuit 100 in the first embodiment of the present application belong to the same concept. The implementation process is described in detail in the first embodiment and will not be repeated here.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power detection circuit, characterized in that, Comprising: A switch module and a power supply voltage detection module; wherein, the switch module includes a switch driving end and a switch signal end; the power supply voltage detection module includes a driving end, an input end, and an output end; The input end of the power supply voltage detection module is connected to the power supply for inputting a power supply voltage signal; the output end of the power supply voltage detection module is connected to the main controller; The switch driving end of the switch module is used to receive a power quantity detection control signal and control the working state of the switch module through the power quantity detection control signal; the switch signal end of the switch module is connected to the driving end of the power supply voltage detection module for driving the power supply voltage detection module to output a power supply voltage detection signal to the main controller.

2. The power detection circuit according to claim 1, wherein: The power supply voltage detection module includes a first switch tube, a first resistor, and a voltage dividing circuit; The first switch tube includes a first driving end, a first signal end, and a second signal end; the driving end of the first switch tube is connected to one end of the first resistor, the other end of the first resistor is the driving end of the power supply voltage detection module, the first signal end of the first switch tube is the input end of the power supply voltage detection module, the second signal end of the first switch tube is connected to the input end of the voltage dividing circuit, and the output end of the voltage dividing circuit is the output end of the power supply voltage detection module.

3. The power detection circuit according to claim 2, wherein: The voltage dividing circuit includes a second resistor and a third resistor, the second signal end of the first switch tube is successively grounded through the second resistor and the third resistor, and the connection between the third resistor and one end of the second resistor is the output end of the power supply voltage detection module.

4. The power detection circuit according to claim 3, wherein: It further includes a filtering component, and the filtering component is connected in parallel at both ends of the third resistor.

5. The power detection circuit according to claim 4, wherein: The filtering component is a filtering capacitor, and the filtering capacitor is connected in parallel at both ends of the third resistor.

6. The power detection circuit according to any one of claims 1-5, characterized in that: The switch module includes a second switch tube and a fourth resistor; The second switch tube includes a second driving end, a third signal end, and a fourth signal end; the second driving end of the second switch tube is the switch driving end of the switch module; the third signal end of the second switch tube is connected to the fourth resistor and then serves as the first switch signal end of the switch module; the fourth signal end of the second switch tube is the second switch signal end of the switch module.

7. The power detection circuit according to claim 6, wherein: The switch module further includes a fifth resistor and a sixth resistor, and the second driving end of the second switch tube serves as the switch driving end of the switch module only after being connected to the fifth resistor; the second driving end of the second switch tube is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded.

8. A circuit main board, characterized in that, It includes the power quantity detection circuit according to any one of claims 1 - 7.

9. The circuit main board according to claim 8, characterized in that, It further includes a main controller, and the main controller is connected to the switch driving end of the switch module of the power quantity detection circuit.

10. An intelligent lock, characterized in that, It includes a lock body, and the power quantity detection circuit according to any one of claims 1 - 7, or the circuit board according to claim 8, or the circuit board according to claim 9; the power quantity detection circuit or the circuit board is arranged inside the lock body.

Images