CN115278844A - A low power consumption monitoring circuit and security detection control device - Google Patents

Abstract

The invention provides a low power consumption monitoring circuit and a security detection control device, belonging to the field of monitoring structures. The circuit of the invention includes: an inductive switch component: used to monitor whether the collected data changes; a wireless communication module: after waking up, collect and process the data collected by the inductive switch, and enter a deep sleep state after processing; an inductive switch alarm trigger circuit : Connected to the output end of the induction switch assembly, when the collected data changes abnormally, wake up the wireless communication module to collect the data of the induction switch assembly; an induction switch cancels the alarm trigger circuit: Connected to the output end of the induction switch assembly, when the collected data returns to normal, Wake up the wireless communication module to collect sensor switch component data. The beneficial effects of the invention are that the circuit is simple and ultra-low power consumption can be realized.

Description

A low power consumption monitoring circuit and security detection control device

technical field

The invention relates to a monitoring device, in particular to a low power consumption monitoring circuit and a security detection control device.

Background technique

Existing security monitoring and alarm products, such as liquid level controllers, are equipped with a dedicated MCU chip as the control peripheral circuit, which is connected to the MCU chip and the wireless communication module. For data calculation, it is not uploaded immediately, but temporarily stored in the device. The background server actively connects to the device at regular intervals, and sends and receives data through the wireless communication module.

This kind of circuit has the following problems:

1. When using the wireless communication module, an MCU chip is required as the connection module and the control peripheral circuit. The circuit structure is complex and the equipment is large in size;

2. The MCU chip and external devices detect the sensor switch to collect data at all times, and cannot enter the deep sleep state. When only dry batteries can be used for power supply, the purpose of reducing power consumption, improving battery life, and long-term use cannot be achieved. The limitation of power consumption causes many functions to be sacrificed during product design, and power consumption and battery life are directly related to the feasibility of the product. Therefore, how to achieve higher computing power under the premise of reducing components and reducing power consumption has become a difficult problem for various manufacturers.

When manufacturers launch their own low-power products, they can only use low-power MCUs and reduce the use of peripheral components as much as possible. The existing integrated MCU chip + wireless communication module solution has always been unable to achieve low power consumption and improve The issue of endurance.

In addition, due to the complex circuit and high power consumption, the product is usually equipped with an adapter or a solar panel, which must be installed and used by professionals. However, there are many restrictions on installation and use, such as connecting to a power source and installing solar panels.

Contents of the invention

In order to solve the problems of complex circuits and poor battery life in the prior art, the present invention provides a low power consumption monitoring circuit and a security detection control device including the low power consumption monitoring circuit.

The present invention includes an induction switch assembly: used for monitoring whether the collected data changes;

A wireless communication module: After waking up, collect and process the data collected by the sensor switch, and enter a deep sleep state after processing;

A sensor switch alarm trigger circuit: connected to the output terminal of the sensor switch component, when the collected data changes abnormally, wake up the wireless communication module to collect the data of the sensor switch component;

An induction switch release alarm triggering circuit: connected to the output terminal of the induction switch assembly, when the collected data returns to normal, the wireless communication module is awakened to collect the data of the induction switch assembly.

The present invention is further improved, the induction switch assembly includes an induction switch and a transistor Q3 connected to the output end of the induction switch, the base of the transistor Q3 is connected to the output end of the induction switch, and the collectors are respectively connected to the input end of the wireless communication module 1. The sensor switch alarm trigger circuit is connected to the output terminal of the sensor switch alarm release trigger circuit, and the emitter is connected to the power supply.

As a further improvement of the present invention, the sensor switch alarm trigger circuit includes a first switch unit and a first delay unit, the control terminal of the first switch unit is connected to the output terminal of the sensor switch assembly, and one terminal of the first switch unit It is connected with the enabling pin of the wireless communication module, and the other end is connected with the first delay unit.

The present invention is further improved, the first switch unit is a transistor Q6, the first delay unit includes a transistor Q9, a capacitor C14, and a resistor R27, the base of the transistor Q9 is connected to the base of the transistor Q6, and the transistor Q9 The collector, capacitor C14, and one end of resistor R27 are grounded, and the emitter of transistor Q9, capacitor C14, and the other end of resistor R27 are respectively connected to the emitter of transistor Q6.

As a further improvement of the present invention, the induction switch alarm release trigger circuit includes an isolation unit, a trigger unit, a second switch unit and a second delay unit, wherein the isolation unit is arranged between the output end of the induction switch assembly and the trigger unit Between the input ends of the second switch unit, the control end of the second switch unit is connected to the output end of the trigger unit, one end of the second switch unit is connected to the enabling pin of the wireless communication module, and the other end is connected to the second delay unit .

The present invention is further improved, the isolation unit is a diode D5, wherein the anode of the diode D5 is connected to the output end of the induction switch assembly, the trigger unit is a triode Q8, the base of the triode Q8 is connected to the cathode of the diode D5, and emits The pole is connected to the power supply, and the collector is connected to the control terminal of the second switch unit.

The present invention is further improved, the second switch unit is a transistor Q7, the second delay unit includes a transistor Q10, a capacitor C15, and a resistor R31, the base of the transistor Q10 is connected to the base of the transistor Q7, and the transistor Q10 The collector, capacitor C15, and one end of resistor R31 are grounded, and the emitter of transistor Q10, capacitor C15, and the other end of resistor R31 are respectively connected to the emitter of transistor Q7.

The present invention also provides a security detection and control device, which includes a housing, a circuit board arranged in the housing, and a power supply module. The circuit board is provided with the above-mentioned low power consumption monitoring circuit, and includes more than one signal lines, and the other end of one of the signal lines is connected to the sensor switch assembly.

As a further improvement in the present invention, the signal line also includes a second signal line connected to external equipment, the other end of the second signal line is connected to a wireless communication module, and the security detection control device also includes a For the indicator light and the reset button on the board, a light-transmitting area is provided on the housing corresponding to the indicator light, and the reset button is arranged in the installation hole of the housing.

As a further improvement of the present invention, the security detection control device also includes a first spacer and a second spacer that are integrally injection-molded with one end of the signal line, and the first spacer and the second spacer are An installation channel is provided between the plates, and the area where the housing and the signal line meet is embedded in the installation channel, and the first limiting partition and the second limiting partition can limit the assembly position of the signal line .

Compared with the prior art, the beneficial effects of the present invention are: to achieve ultra-low power consumption, to use the device for a long time, to highly integrate the control board including battery power supply and communication module in a box, to reduce unnecessary accessories, The cost is reduced, the installation and use of the product are simplified, the market competitiveness is improved, and the structure is simple, which is conducive to the miniaturization of the product.

Description of drawings

Fig. 1 is a circuit schematic diagram of the present invention;

Fig. 2 is the structural representation of device of the present invention;

Fig. 3 is a schematic diagram of the internal structure of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the low power consumption monitoring circuit of the present invention does not deploy a special MCU, but integrates the instruction program into the internal processor in the wireless communication module, shares an MCU chip with the wireless communication module, and acts as an external sensor switch component When the collected data does not change, the wireless communication module quickly enters the deep sleep state, completely realizing the purpose of ultra-low power consumption and long-term use of the device. The present invention is applicable to the monitoring of monitoring sensor components with two state changes, such as liquid level sensors, infrared induction switches, microwave induction switches, piezoelectric induction switches, electromagnetic induction switches, capacitance induction switches and the like.

Specifically, the wireless communication module 200 of the low-power monitoring circuit in this example uses the wireless chip U1. After waking up, the data collected by the sensor switch 100 is collected, processed, and sent out. After processing, it enters a deep sleep state to achieve real ultra-low Power consumption, so that it is possible to supply power by a single battery, effectively reducing unnecessary accessories, reducing costs, and simplifying the installation and use of products.

The sensor switch component of this example is used to monitor whether the collected data changes; this example also includes a sensor switch alarm trigger circuit 300: connected to the output terminal of the sensor switch component, when the collected data changes abnormally, the wireless communication module is awakened to collect the sensor switch component Data; and sensor switch release alarm trigger circuit 400: connected to the output terminal of the sensor switch component, when the collected data returns to normal, wake up the wireless communication module to collect data of the sensor switch component.

The inductive switch assembly of this example includes an inductive switch 100 and a triode Q3 connected to the output end of the inductive switch. The base of the triode Q3 is connected to the output end of the inductive switch, and the collector is connected to the input end of the wireless communication module, the inductive switch, and the inductive switch. The switch alarm trigger circuit is connected with the output end of the sensor switch alarm release trigger circuit, and the emitter is connected to the power supply.

The induction switch alarm triggering circuit 300 includes a first switch unit and a first delay unit, the control end of the first switch unit is connected to the output end of the induction switch assembly, and one end of the first switch unit is connected to the wireless communication module. The enabling pins are connected, and the other end is connected with the first delay unit.

The first switch unit of this example is a transistor Q6, and the first delay unit includes a transistor Q9, a capacitor C14, and a resistor R27. The base of the transistor Q9 is connected to the base of the transistor Q6, and the collector of the transistor Q9, capacitor C14 1. One end of the resistor R27 is grounded, and the emitter of the transistor Q9, the capacitor C14, and the other end of the resistor R27 are respectively connected to the emitter of the transistor Q6.

The induction switch alarm release trigger circuit 400 includes an isolation unit, a trigger unit, a second switch unit and a second delay unit, wherein the isolation unit is arranged between the output end of the induction switch assembly and the input end of the trigger unit , the control end of the second switch unit is connected to the output end of the trigger unit, one end of the second switch unit is connected to the enabling pin of the wireless communication module, and the other end is connected to the second delay unit.

In this example, the isolation unit is a diode D5, wherein the anode of the diode D5 is connected to the output end of the induction switch assembly, the trigger unit is a triode Q8, the base of the triode Q8 is connected to the cathode of the diode D5, the emitter is connected to the power supply, and the collector Connect to the control terminal of the second switch unit.

The second switch unit of this example is a transistor Q7, and the second delay unit includes a transistor Q10, a capacitor C15, and a resistor R31. The base of the transistor Q10 is connected to the base of the transistor Q7, and the collector of the transistor Q10, capacitor C15 1. One end of the resistor R31 is grounded, and the emitter of the transistor Q10, the capacitor C15, and the other end of the resistor R31 are respectively connected to the emitter of the transistor Q7.

The working principle of the low power monitoring circuit in this example is:

If the data collected by the sensor switch changes, wake up the wireless communication module in time, and the output terminal of the sensor switch is connected to the input terminal of the control circuit. When the sensor switch changes, the 3.3V voltage passes through the sensor switch to the base of the transistor Q3. The base of the triode Q3 changes from low level to high level, the triode Q3 changes from cut-off to on-state, the voltage V _D potential of point D changes from low to high, and then it is divided into two circuits, one of which is directly connected to the wireless communication chip U1. Pin 10, the other is connected to the resistor R25, after passing through the resistor R25, the potential B point voltage V _B changes from low to high, the base of the transistor Q6 gets a high potential, the transistor Q6 is turned on, and the voltage V _A of the EN terminal of the wireless communication module passes through the resistor R28 and The transistor Q6 charges the capacitor C14, and since the capacitor voltage cannot change abruptly, the voltage V _A is pulled down.

The voltage V _C at point C changes from a low voltage to a high voltage as the capacitor C14 is charged. When the voltage V _C = the voltage V _B , the transistor Q6 is turned off and stops charging the capacitor C14. The voltage VA of the EN terminal of the wireless communication chip U1 returns to its original state, that is, a process in which the voltage of the EN terminal of the wireless communication module is momentarily pulled down to the recovery voltage (triggering to wake up the wireless communication module in deep sleep). The wireless communication chip U1 sends and receives data through the wireless communication module after data calculation. At this time, the capacitor C14 is discharged through the resistor R27, waiting for the next charging trigger.

When the alarm is released and the induction switch changes again, from connected to disconnected, the triode Q3 changes from on to off, the voltage V _D at point D changes from high to low, and the base voltage of the triode Q8 is pulled down by the resistor R33. The base voltage of Q8 changes from high to low, and the triode Q8 changes from cut-off to on. The 3.3V voltage reaches the base of the transistor Q7 through the diode D6, the transistor Q8 and the resistor R32. The base of the transistor Q7 gets a high voltage, and the transistor Q7 is turned on. _The EN terminal voltage VA of the wireless communication chip U1 charges the capacitor C15 through the resistor R30 and the transistor Q7 _. Since the capacitor voltage cannot change abruptly, the voltage VA is pulled down. The voltage V _F at point F changes from a low voltage to a high voltage as the capacitor C15 is charged. When the voltage V _F = _VE , the transistor Q7 is turned off and stops charging the capacitor C15. The voltage V _A of the EN terminal of the wireless communication module returns to the original state, that is, the process of the EN terminal of the wireless communication chip being pulled down to the recovery voltage instantaneously (triggering to wake up the wireless communication module in deep sleep). After the transistor Q7 is cut off, the capacitor C15 is discharged through the resistor R31, waiting for the next charging trigger.

When the data collected by the external sensor switch changes, the sensor switch signal is transmitted to the alarm trigger circuit to wake up the deep-sleeping wireless module, and sends data to the cloud processor. Inform users to achieve real-time data. Therefore, only when the state changes, the wireless communication module is woken up for a short time, and then enters a deep sleep state after the processing is completed, so that ultra-low power consumption can be realized.

As shown in Figure 2, the security detection and control device of this example adopts the above-mentioned low-power monitoring circuit, and includes a casing composed of an upper cover 1 and a bottom cover 2. The upper cover 1 of the box adopts the method of labeling the whole surface, and the waterproof label 3 can not only simplify the design, but also play a waterproof role. In addition, a reset case 4 is provided at the corresponding position of the upper cover 1 and the waterproof label 3. In addition, a light-transmitting window is also provided on the upper cover 1, and the corresponding position of the waterproof label 3 and the light-transmitting window is transparent. Designed so that the light emitted by the internal indicator light indicates the working status of the device.

On one side of the security detection control device, the first signal line 5 and the second signal line 7 are drawn out, and the end of the first signal line 5 and the second signal line 7 connected to the housing is provided with a second limit Partition plate 7, on the other side of the security detection control device, an assembly hook 8 with an opening is added, so that the device is easily hung or installed in a suitable position by screws.

The first signal line 5 is used to connect the detection component, and the second signal line 7 is used to connect external equipment. As an embodiment of the present invention, the security detection control device of this example is an intelligent liquid level controller, and the detection component It is a liquid level sensor used to monitor the liquid level. If the liquid level is lower than the set liquid level, the liquid level sensor will send the monitored alarm information to the cloud or the equipment connected to it through the intelligent liquid level controller. It is also possible to communicate with the cloud through an external device.

As shown in Figure 3, a battery 11 and a circuit board 16 are provided inside the housing of the present invention, and a wireless communication module connected to the battery 11 is provided on the circuit board 16, and a signal line is connected with the wireless communication module and leads out of the housing external. Correspondingly, the housing is provided with a battery storage space and a circuit board installation area, the bottom cover 2 is provided with a battery back cover 15 corresponding to the battery storage space, and the side wall of the battery storage space is provided with hardware for connecting the battery 11 10. When the battery is installed in the battery slot, a series circuit is formed to meet the electricity demand of the control board of the wireless communication module. The battery rear cover 15 is sealed and connected with the bottom cover 2 through the sealing rubber ring 13, so as to achieve the purpose of convenient battery replacement and waterproof.

The invention integrates the dry battery and the wireless communication module to simplify installation and use. The three-proof paint on the control board can protect the control board, avoid short circuit caused by moisture or water, and improve the service life.

In this example, the battery accommodating space is also provided with a positioning structure for positioning the battery, and the circuit board installation area of this example is provided with a limiting structure for limiting the position of the circuit board.

Specifically, the positioning structure is two vertical plates 14 arranged in parallel on the battery rear cover 15, the top surface of the vertical plates 14 is provided with a limit groove matching the shape of the battery, and the vertical plates 14 are connected to the battery. Several reinforcing ribs 141 are provided at the joints of the back cover 15 to increase the rigidity of the structure. A connecting ear 151 is respectively arranged on both sides of the battery back cover 15, and a screw hole is arranged in the middle of the connecting ear 151, which is fixed with the screw hole on the back cover.

The position-limiting structure includes four first position-limiting posts (not shown in the figure) arranged on the upper cover 1 or the bottom cover 2, and the circuit board 16 is provided with 4 positions corresponding to the first position-limiting posts. A through hole 161, through which the first limiting column abuts against the bottom cover or the upper cover, fixes and positions the circuit board 16, so that the indicator light and the reset button on the circuit board 16 4 is fixed on the corresponding position of the upper cover, the button 17 connected to the circuit board is corresponding to the bottom of the reset button 4, there is also an LED indicator light beside the button 17, and the light-transmitting window of the wireless network logo is above the LED indicator light.

The limiting structure of this example also includes a second limiting column 18 arranged in the middle of the circuit board setting area. The second limiting column 18 is in contact with the circuit board. After the cover 2, the two second limit posts 18 on the bottom cover 2 press the middle part of the circuit board 16 to fix it.

The bottom cover 2 and the upper cover 1 of the device housing in this example are directly clamped with plastic buckles 12, which is convenient for the installation of the bottom cover 2 and the upper cover 1, and there is no gap in the middle to achieve a waterproof effect. Of course, in order to increase the waterproof function, in this example, a waterproof rubber ring can also be provided on the contact surface between the bottom cover 2 and the upper cover 1 .

Preferably, the security detection control device of this example also includes a first spacer 9 and a second spacer 7 integrally injection-molded with one end of the signal line, and the first spacer 9 and the second spacer There is an installation channel between the boards 7, and the area where the housing and the signal line meet is embedded in the installation channel to limit the position, and the first limit partition 9 and the second limit partition 7 are limited to prevent the signal In addition, it can also play a waterproof role in the wiring port.

Compared with the prior art, the circuit of the present invention is simple, there is only one wireless communication module on the control board, and the power consumption is ultra-low, and the battery can be used continuously for more than one and a half years at a time, realizing the purpose of using the equipment for a long time, including the battery The control board of the power supply and communication module is highly integrated inside a box, reducing unnecessary accessories, reducing costs, simplifying product installation and use, and improving market competitiveness. The structure is simple, the product is small, and the hardware cost and installation of the product are effectively reduced. maintenance costs.

The specific implementation manners described above are preferred implementation modes of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but not limited to the specific implementation modes. All equivalent changes made according to the present invention are Within the protection scope of the present invention.

Claims (10)

1. A low-power monitoring circuit, characterized in that, comprising: A sensor switch component: used to monitor whether the collected data changes; A wireless communication module: After waking up, collect and process the data collected by the sensor switch, and enter a deep sleep state after processing; A sensor switch alarm trigger circuit: connected to the output terminal of the sensor switch component, when the collected data changes abnormally, wake up the wireless communication module to collect the data of the sensor switch component; An induction switch release alarm triggering circuit: connected to the output terminal of the induction switch assembly, when the collected data returns to normal, the wireless communication module is awakened to collect the data of the induction switch assembly. 2. The low power consumption monitoring circuit according to claim 1, characterized in that: said inductive switch assembly comprises an inductive switch and a triode Q3 connected to the output end of the inductive switch, the base of the triode Q3 is connected to the output of the inductive switch The collector is connected to the input terminal of the wireless communication module, the sensor switch alarm trigger circuit and the output terminal of the sensor switch alarm release trigger circuit, and the emitter is connected to the power supply. 3. The low power consumption monitoring circuit according to claim 1, characterized in that: the sensor switch alarm trigger circuit includes a first switch unit and a first delay unit, the control terminal of the first switch unit is connected to the sensor switch The output ends of the components are connected, one end of the first switch unit is connected with the enabling pin of the wireless communication module, and the other end is connected with the first delay unit. 4. The low power consumption monitoring circuit according to claim 3, characterized in that: the first switch unit is a transistor Q6, the first delay unit includes a transistor Q9, a capacitor C14, and a resistor R27, and the transistor Q9 The base of the transistor Q6 is connected to the base of the transistor Q6, the collector of the transistor Q9, the capacitor C14, and one end of the resistor R27 are grounded, and the emitter of the transistor Q9, the capacitor C14, and the other end of the resistor R27 are respectively connected to the emitter of the transistor Q6. 5. The low power consumption monitoring circuit according to claim 1, characterized in that: the induction switch release alarm trigger circuit includes an isolation unit, a trigger unit, a second switch unit and a second delay unit, wherein the isolation The unit is arranged between the output end of the induction switch assembly and the input end of the trigger unit, the control end of the second switch unit is connected to the output end of the trigger unit, and one end of the second switch unit is connected to the enable The pins are connected, and the other end is connected with the second delay unit. 6. The low power consumption monitoring circuit according to claim 5, characterized in that: the isolation unit is a diode D5, wherein the anode of the diode D5 is connected to the output end of the sensing switch component, the trigger unit is a triode Q8, and the The base of the transistor Q8 is connected to the cathode of the diode D5, the emitter is connected to the power supply, and the collector is connected to the control terminal of the second switch unit. 7. The low power consumption monitoring circuit according to claim 6, characterized in that: the second switch unit is a transistor Q7, the second delay unit includes a transistor Q10, a capacitor C15, and a resistor R31, and the transistor Q10 The base of the triode Q10 is connected to the base of the transistor Q7, the collector of the transistor Q10, the capacitor C15, and one end of the resistor R31 are grounded, and the emitter of the transistor Q10, the capacitor C15, and the other end of the resistor R31 are respectively connected to the emitter of the transistor Q7. 8. A security detection and control device, characterized in that: it comprises a housing, a circuit board and a power supply module arranged in the housing, and the circuit board is provided with the low-power monitoring device according to any one of claims 1-7. The circuit also includes more than one signal line connected to the circuit board, and the other end of one of the signal lines is connected to the induction switch assembly. 9. The security detection control device according to claim 8, characterized in that: the signal line also includes a second signal line connected to external equipment, the other end of the second signal line is connected to a wireless communication module, the The security detection control device also includes an indicator light and a reset button arranged on the circuit board, a light-transmitting area is provided on the housing corresponding to the indicator light, and the reset button is arranged in the installation hole of the housing Inside. 10. The security detection and control device according to claim 8, characterized in that: the security detection and control device further comprises a first spacer and a second spacer integrally injection-molded with one end of the signal line, the An installation channel is provided between the first spacer and the second spacer, and the area where the housing and the signal line meet is embedded in the installation channel, and the first spacer and the second spacer The plate can limit the assembly position of the signal line.

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