CN107959493A - Inductive switch and its control method - Google Patents

Abstract

Inductive switch, including wireless induction host and wireless mobile apparatus, wireless induction host include：Wireless module, for broadcast wireless signal and the wireless answering information of reception wireless mobile apparatus standard, the attribute information of the distance between wireless induction host and wireless mobile apparatus value and mobile wireless device is obtained by handling and calculating, and compares distance value and device attribute and gives switch metal-oxide-semiconductor with the difference of predetermined threshold value size and device attribute to export corresponding control signal；Metal-oxide-semiconductor is switched, for carrying out open or close according to the control signal received；Power module, for powering to wireless module.The present invention does sensing detection using the radio frequency signal with bluetooth or the electronic equipment of wifi and inductive switch, and two equipment are in communication with each other control in the range of certain distance；Product cost is low, and performance is stablized, easy to install, greatly improves the intellectualized operation of product.

Description

Sensor switch and its control method

technical field

The invention relates to an induction switch and a control method thereof.

Background technique

At present, most of the switches with induction function in the market solve the on and off status of the switch through Internet APP transmission, 24G remote control, 433MHZ remote control and other methods. There are also many corresponding products, some of which are relatively simple, easy to implement, and relatively low in cost. It is more complicated, easy to realize some advantages such as remote control, but mainly has the following disadvantages:

1. The functions of relatively simple products are relatively single, and the supporting remote control must be used for remote control. If the remote control is broken or lost, the remote control function will be invalid at this time;

2. For more complicated products, although remote control can be easily realized, the cost of use will increase. The control reliability is greatly affected by external factors, mainly depends on the stability of the network and the quality of the control equipment, which is not practical for ordinary users.

The existing patent application CN 105096556 A discloses a wireless digital sensor control switch. Through the installed wireless sensor module, the user terminal can sense the wireless digital signal within the effective communication distance without changing the hardware and software, and To respond, the sensing control module controls the switch according to the sensed terminal response signal and other control conditions. The feature is that the method includes adopting standard wireless communication protocols, including wireless digital communication networks such as wifi and bluetooth. The information point data sent by the wireless sensor control module adopts standard transmission. When the user holds a terminal device with wifi and Bluetooth wireless standards and approaches the coverage area of the sensor module, when the wireless terminal receives the data of digital broadcasting, it will reply the standard The wireless response signal, the wireless digital sensing module generates a switch signal according to the received response information and other set control conditions, so as to realize the switch control. However, this application does not disclose a specific switch control method.

Contents of the invention

The invention provides an inductive switch with stable performance and greatly improved intelligent operation of products and a control method thereof.

The technical scheme adopted in the present invention is:

The induction switch includes a wireless induction host and a wireless mobile device, and is characterized in that: the wireless induction host includes:

The wireless module is used to broadcast wireless signals and receive standard wireless response information of wireless mobile devices, obtain the distance value between the wireless sensor host and the wireless mobile device and the attribute information of the mobile wireless device through processing and calculation, and compare the distance value and The difference between the device attribute and the preset threshold value and device attribute is used to output the corresponding control signal to the switch MOS tube;

A switch MOS tube is used to open or close according to the received control signal;

The power module is used to supply power to the wireless module. The invention utilizes the wireless radio frequency signal and the induction switch of the electronic equipment with bluetooth or wifi to do induction detection, and the two equipments communicate and control each other within a certain distance; the product has low cost, stable performance, convenient installation and use, and greatly improves the safety Intelligent operation.

Further, the calculation formula of the distance value is as follows:

d=10^((abs(RSSI)-A)/(10*n))

Among them: d is the calculated distance; RSSI is the received signal strength; A is the signal strength when the transmitter and receiver are separated by 1 meter; n is the environmental attenuation factor; the abs function is the absolute value of the number of targets.

Further, the wireless module is a Bluetooth or WIFI module.

Further, the switch MOS tube is a relay or a MOSFET, the input end of the relay is connected to the GPIO interface of the wireless module through the triode, and the input end of the MOSFET is connected to the GPIO interface of the wireless module.

Further, the power module includes an AC/DC circuit for converting 220VAC into 5V DC and a low-dropout linear regulator for stabilizing 5V into 3V3.

The control method of the above-mentioned induction switch, its steps include:

Turn on the wireless mobile device;

The wireless sensor host regularly transmits general broadcasts, and wireless mobile devices active within the coverage of the broadcasts will receive the broadcasts and respond to their own characteristics;

After the wireless sensing host receives the information of the wireless mobile device responding to the broadcast packet, it will process and calculate to obtain the address, attribute, and distance value of the target wireless mobile device from the wireless sensing host;

The wireless sensing host controls the switching of the sensing switch by comparing the distance value with the preset threshold value.

Further, when the distance value is smaller than the preset threshold, the sensing switch is turned on; when the distance value is greater than the preset threshold, the sensing switch is turned off.

Further, the calculation formula of the distance value is as follows:

d=10^((abs(RSSI)-A)/(10*n))

Among them: d is the calculated distance; RSSI is the received signal strength; A is the signal strength when the transmitter and receiver are separated by 1 meter; n is the environmental attenuation factor; the abs function is the absolute value of the number of targets.

Further, the wireless module of the wireless induction host is a Bluetooth or WIFI module.

Further, the switching MOS tube of the wireless sensor host is a relay or MOSFET, the relay is controlled by the GPIO driving transistor of the wireless module, and the MOSFET is directly driven and controlled by the GPIO of the wireless module.

Beneficial effects of the present invention: it is more advanced than the traditional switch, no need to operate the switch by hand, and the on and off state of the switch can be controlled by bringing a bluetooth or wifi device; it is simpler than the Internet switch, and it can be controlled wirelessly in a short distance without the network; that is, it can be released It also solves the problem of automatically sensing the on and off of the control switch even when there is no network.

Description of drawings

Fig. 1 is an open schematic view of the structure of the present invention.

Fig. 2 is a schematic diagram of the structure closure of the present invention.

Fig. 3 is a schematic circuit diagram of the wireless induction host of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

Embodiment one

Referring to Figure 1-3, the sensor switch includes a wireless sensor host 2 and a wireless mobile device 5, and the wireless sensor host 2 includes:

The wireless module 4, which can be a Bluetooth module or a WIFI module, is used to broadcast wireless signals and receive standard wireless response information from wireless mobile devices, and obtain the distance value between the wireless sensor host and the mobile wireless device and the wireless mobile device through processing and calculation. attribute information, and compare the difference between the distance value and device attribute and the preset threshold value and device attribute to output the corresponding control signal to the switch MOS tube;

The switch MOS tube 3 can be a relay or a MOSFET. The relay is controlled by the GPIO drive transistor of the wireless module, and the MOSFET is directly controlled by the GPIO drive of the wireless module, and is used to open or close according to the received control signal;

The power module 1 is used to supply power to the wireless module. The invention utilizes the wireless radio frequency signal and the induction switch of the electronic equipment with bluetooth or wifi to do induction detection, and the two equipments communicate and control each other within a certain distance; the product has low cost, stable performance, convenient installation and use, and greatly improves the safety Intelligent operation.

The calculation formula of the distance value in this embodiment is as follows:

d=10^((abs(RSSI)-A)/(10*n))

Among them: d is the calculated distance; RSSI is the received signal strength; A is the signal strength when the transmitter and receiver are separated by 1 meter; n is the environmental attenuation factor; the abs function is the absolute value of the number of targets.

The wireless module of this embodiment takes the Bluetooth module as an example, and adopts the Bluetooth chip TLSR8267 of Telink Microelectronics, which is a single-chip Bluetooth with rich peripherals and does not need an external microcontroller. The switch MOS tube is a relay or MOSFET. The input end of the relay is connected to the GPIO interface of the Bluetooth chip through the triode, and the input end of the MOSFET is connected to the GPIO interface of the Bluetooth chip. The AC/DC circuit used by the power module is composed of U3, T1 and other devices, which directly converts 220VAC into 5V DC, and uses an LDO low dropout linear regulator (U2) to stabilize 5V into 3V3 for use by the Bluetooth chip. Corresponding wireless mobile device 5 uses the mobile phone with bluetooth function.

In this embodiment, the threshold value is set to 3m. When the user holds the mobile phone (Bluetooth has been turned on), approaches the Bluetooth host and arrives in the sensing area, the Bluetooth chip calculates the distance d between the mobile phone and the Bluetooth host. When the distance d is greater than 3m, the Bluetooth The chip controls the closing of the relay (or MOSFET), thereby realizing the closing of the inductive switch. When the distance value d is less than 3m, the bluetooth chip controls the relay (or MOSFET) to turn on, thereby realizing the turn-on of the induction switch.

The radio frequency signal can be sensed and detected between the wireless induction host 2 and the wireless mobile device 5 without installing additional mobile device application APP processing, and the on and off state of the switch can be processed through the radio frequency signal. It can be applied to Bluetooth sensor 86 box switch, Bluetooth sensor access control switch, Bluetooth sensor socket and other applications.

Embodiment two

Referring to Figures 1-3, a control method for a sensor switch includes a wireless sensor host 2 and a wireless mobile device 5, the wireless sensor host 2 includes: a wireless module 4, which can be a Bluetooth module or a WIFI module, for broadcasting wireless signals and receiving The standard wireless response information of the mobile device is processed and calculated to obtain the distance value between the wireless sensing host and the mobile wireless device and the attribute information of the mobile wireless device, and compares the distance value and device attribute with the preset threshold value and device attribute information The difference is to output the corresponding control signal to the switch MOS tube; the switch MOS tube 3 can be a relay or MOSFET, the relay is controlled by the GPIO drive triode of the wireless module, and the MOSFET is directly controlled by the GPIO drive of the wireless module, which is used to control the signal according to the received control signal. The signal is opened or closed; the power module 1 is used to supply power to the wireless module; the steps include:

Turn on the wireless mobile device 5;

The wireless sensor host 2 regularly transmits general broadcasts, and wireless mobile devices active within the coverage of the broadcasts will receive the broadcasts and respond to their own characteristics;

After the wireless sensing host 2 receives the information of the wireless mobile device 5 responding to the broadcast packet, it will process and calculate to obtain the address, attribute, and distance value of the target wireless mobile device 5 from the wireless sensing host 2;

The wireless sensor host 2 controls the switch of the sensor switch by comparing the distance value with the preset threshold value; when the distance value is less than the preset threshold value, the sensor switch is turned on; when the distance value is greater than the preset threshold value, the sensor switch is turned off.

The calculation formula of the distance value in this embodiment is as follows:

d=10^((abs(RSSI)-A)/(10*n))

Among them: d is the calculated distance; RSSI is the received signal strength; A is the signal strength when the transmitter and receiver are separated by 1 meter; n is the environmental attenuation factor; the abs function is the absolute value of the number of targets.

The wireless module of this embodiment takes the Bluetooth module as an example, and adopts the Bluetooth chip TLSR8267 of Telink Microelectronics, which is a single-chip Bluetooth with rich peripherals and does not need an external microcontroller. The switch MOS tube is a relay or MOSFET. The input end of the relay is connected to the GPIO interface of the Bluetooth chip through the triode, and the input end of the MOSFET is connected to the GPIO interface of the Bluetooth chip. The AC/DC circuit used by the power module is composed of U3, T1 and other devices, which directly converts 220VAC into 5V DC, and uses an LDO low dropout linear regulator (U2) to stabilize 5V into 3V3 for use by the Bluetooth chip. Corresponding wireless mobile device 5 uses the mobile phone with bluetooth function.

In this embodiment, the threshold value is set to 3m. When the user holds the mobile phone (Bluetooth has been turned on), approaches the Bluetooth host and arrives in the sensing area, the Bluetooth chip calculates the distance d between the mobile phone and the Bluetooth host. When the distance d is greater than 3m, the Bluetooth The chip controls the closing of the relay (or MOSFET), thereby realizing the closing of the inductive switch. When the distance value d is less than 3m, the bluetooth chip controls the relay (or MOSFET) to turn on, thereby realizing the turn-on of the induction switch.

The radio frequency signal can be sensed and detected between the wireless induction host 2 and the wireless mobile device 5 without APP processing, and the on and off state of the switch is processed through the radio frequency signal. It can be applied to Bluetooth sensor 86 box switch, Bluetooth sensor access control switch, Bluetooth sensor socket and other applications.

Claims (10)

1. inductive switch, including wireless induction host and wireless mobile apparatus, it is characterised in that：Wireless induction host includes：

Wireless module, for broadcast wireless signal and receive wireless mobile apparatus standard wireless answering information, by processing and Calculate to obtain the attribute information of the distance between wireless induction host and wireless mobile apparatus value and mobile wireless device, and compare Compared with distance value and device attribute switch MOS is given to export corresponding control signal with the difference of predetermined threshold value size and device attribute Pipe；

Metal-oxide-semiconductor is switched, for carrying out open or close according to the control signal received；

Power module, for powering to wireless module.

2. inductive switch according to claim 1, it is characterised in that：The calculation formula of distance value is as follows：

D=10^ ((abs (RSSI)-A)/(10*n))

Wherein：D is calculating gained distance；RSSI is received signal strength；A is signal when transmitting terminal and receiving terminal are separated by 1 meter Intensity；N is the environmental attenuation factor；Abs functions are to obtain the absolute value of number of targets.

3. inductive switch according to claim 1, it is characterised in that：Wireless module is bluetooth or WIFI module.

4. inductive switch according to claim 1, it is characterised in that：Switch metal-oxide-semiconductor is relay or MOSFET, relay Input terminal pass through the GPIO interface of triode and wireless module and connect, the input terminal of MOSFET and the GPIO interface of wireless module Connection.

5. the inductive switch according to one of Claims 1 to 4, it is characterised in that：Power module includes changing 220VAC AC/DC circuits into 5V direct currents and the low pressure difference linear voltage regulator by 5V voltage stabilizings into 3V3.

6. the control method of inductive switch according to claim 1, its step includes：

Open wireless mobile apparatus；

The timing of wireless induction host is launched generic broadcasted, and movable wireless mobile apparatus can receive this in the range of broadcast covers It is a to broadcast and respond the characteristic of itself；

After wireless induction host receives the information that wireless mobile apparatus responds broadcast packet, it can be handled and be calculated to obtain Target Wireless moves address, attribute and the distance value apart from wireless induction host of equipment；

Wireless induction host controls the switch of inductive switch by comparing the size of distance value and predetermined threshold value.

7. control method according to claim 6, it is characterised in that：When distance value is less than predetermined threshold value, inductive switch Open；When distance value is more than predetermined threshold value, inductive switch is closed.

8. control method according to claim 6, it is characterised in that：The calculation formula of distance value is as follows：

D=10^ ((abs (RSSI)-A)/(10*n))

Wherein：D is calculating gained distance；RSSI is received signal strength；A is signal when transmitting terminal and receiving terminal are separated by 1 meter Intensity；N is the environmental attenuation factor；Abs functions are to obtain the absolute value of number of targets.

9. control method according to claim 6, it is characterised in that：The wireless module of wireless induction host for bluetooth or WIFI module.

10. according to the control method described in one of claim 6-9, it is characterised in that：The switch metal-oxide-semiconductor of wireless induction host is Relay or MOSFET, relay are controlled by the GPIO driving triodes of wireless module, and MOSFET is directly by wireless module GPIO drive controls.