WO2006026917A1

WO2006026917A1 - A magnetic activated apparatus of a radio circuit

Info

Publication number: WO2006026917A1
Application number: PCT/CN2005/001416
Authority: WO
Inventors: Pengwei Wu
Original assignee: Pengwei Wu
Priority date: 2004-09-07
Filing date: 2005-09-07
Publication date: 2006-03-16
Also published as: CN2727941Y

Abstract

The invention is related to a magnetic trigger apparatus of a radio circuit,including:a magnetic switch(l),which is set in the trigger circuit of the radio circuit module;a magnetic trigger(2),which is set in the cryptographic card corresponding to the magnetic switch(l).The trigger circuit is switched on or switched off by driving the magnetic switch(l) with the magnetic trigger(2).Because the element constructed the trigger loop is a physical element,and not a electronic element,the magnetic switch and the whole trigger loop will be not affected by the factor of the external environment, the performance is very steady,and the reliability is fine. When stood by,the power expenditure of the circuit is zero,so that the interior battery can extend the operating time without being charged,and the service life of the battery can be extended.It acquires the purpose of low cost and using easliy The invention can solve the problems of saving electric power and antiinterference simultaneously,and has the advantages of simple structure,low cast and using easliy.The invention can be widely applied to a vatiety of trigger apparatus of the non-contact radio circuit.

Description

Radio frequency circuit magnetic triggering device

The invention relates to a radio frequency circuit magnetic triggering device, which is suitable for a triggering system of a radio frequency product, and can be applied to, for example, an anti-theft lock product. Background technique

At present, the general non-contact RF circuit is mostly used in lock control systems such as door locks, such as electric locks, handle locks, and the like. The RF circuit reads the data of the password card in a non-contact manner and executes various instructions. Since the power consumption of the RF circuit is greater than 20 mA, the system needs to use a charging power source. If the condition does not allow the use of a wired charging power source, the RF circuit of this configuration cannot be used, and a product with power saving function must be used. To make the system have power-saving function, a feasible method is: when the non-working state makes the RF circuit enter the sleep state during standby, and then use the trigger system to start the RF circuit during operation, thereby reducing power consumption and saving power. purpose. In the prior art, commonly used trigger systems include: an infrared trigger system and a human body sensing system. The infrared trigger system is easily affected by external factors, such as light, color, etc., which can easily cause false triggering and circuit failure. Although the human body sensing system (hot blaze) is relatively stable relative to infrared rays, it is expensive and can cause false triggering. It is more important to note that the standby power consumption of these two schemes exceeds 10 microamps, which also has the disadvantage of large power consumption. Summary of the invention

The object of the present invention is to provide a radio frequency circuit magnetic triggering device, which overcomes the shortcomings of the existing infrared triggering system, the human body sensing system, which is easy to cause false triggering, and the power consumption in the standby state is large.

In order to achieve the above object, the present invention provides a radio frequency circuit magnetic triggering device, which has the following structural features: a magnetic switch is arranged in a trigger circuit of the radio frequency circuit module, corresponding to the magnetic switch, and a magnetic trigger body is disposed in the password card, The magnetic switch is driven by the magnetic trigger body to complete the operation of turning on or off the trigger circuit.

According to an embodiment of the present invention, the magnetic switch is constituted by a conventional reed switch, and correspondingly, the magnetic trigger body disposed in the code card is composed of a conventional magnet, and the magnet may be a block, a sheet or granular.

According to another embodiment of the present invention, the magnetic switch is composed of a normally open type light touch switch, and the light touch switch is composed of two metal contacts and a magnetic spring piece, corresponding thereto, and is disposed in the password card. The magnetic trigger body is composed of iron, iron or iron particles.

According to another embodiment of the present invention, the magnetic switch is composed of a normally open type light touch switch, and the light touch switch is composed of two magnetic contacts and a metal spring piece, corresponding thereto, and is disposed in the password card. The magnetic angle body is composed of iron, iron or iron particles. The invention has the following outstanding effects:

1. The present invention is a magnetic switch that triggers a radio frequency circuit with a magnet device. Since the components constituting the trigger circuit are physical components rather than electronic components, the magnetic switch and the entire trigger circuit are not affected by external environmental factors, and the performance is very stable and highly reliable. In standby mode, the power consumption of the circuit is zero, which enables the built-in battery to prolong the working time and prolong the service life of the battery when it is not charged, achieving economical and convenient use.

2. The invention can solve the problems of power saving and anti-interference at the same time, and has the advantages of structural single tube, low cost and convenient use, and is widely applicable to various non-contact RF circuit triggering devices. DRAWINGS

1 is a schematic structural view of a magnetic trigger switch of a radio frequency circuit of the present invention;

2 is a schematic structural view of a magnetic trigger body of a PIN card of the present invention;

Figure 3 is a schematic structural view of a magnetic switch of Embodiment 1 of the present invention;

Figure 4 is a schematic structural view of a magnetic switch of Embodiment 2 of the present invention;

Figure 5 is a schematic structural view of a magnetic switch of Embodiment 3 of the present invention;

Figure 6 is a schematic diagram of an infrared trigger circuit of the present invention;

Figure 7 is a schematic diagram of a radio frequency circuit of the present invention. detailed description

Specific embodiment 1 :

Embodiment 1 of the present invention will be described with reference to Figs. 1, 2, and 3.

As can be seen from Fig. 1 and Fig. 2, a magnetic switch 1 is provided in the trigger circuit of the radio frequency circuit module 8, and corresponding to the magnetic switch 1, a magnetic trigger body 2 is provided in the cipher card 9.

As is apparent from Fig. 3, the magnetic switch 1 is constituted by a conventional reed switch 7, and correspondingly, the magnetic trigger body 2 provided in the cipher card is composed of a conventional magnet which may be in the form of a block, a sheet or a pellet.

Specific embodiment 2:

Embodiment 2 of the present invention will be described with reference to Figs. 1, 2, and 4.

As can be seen from Fig. 4, the feature of this embodiment that is different from that of the embodiment 1 is that the magnetic switch 1 is composed of a normally open type light touch switch. The light touch switch is composed of two metal contacts 3 and a magnetic spring piece 4. Correspondingly, the magnetic trigger body 2 disposed in the password card is composed of iron, iron or iron particles.

Specific Example 3:

Embodiment 3 of the present invention will be described with reference to Figs. 1, 2, and 5.

As can be seen from FIG. 5, the features of this embodiment that are different from those of Embodiments 1 and 2 are: The magnetic switch 1 is composed of a normally open type light touch switch, and the light touch switch is composed of two magnetic contacts 5 and a metal spring piece 6 According to the configuration, the magnetic trigger body 2 provided in the password card is composed of an iron block, an iron piece or an iron piece. As can be seen from FIG. 1, FIG. 2 and FIG. 3, when the PIN card 7 is close to the reed switch 7, the magnetic trigger body 2 in the PIN card drives the reed switch 7 to be turned on instantaneously, that is, set in the trigger circuit of the RF circuit module 8. The magnetic switch 1 is momentarily turned on, and the trigger circuit drives the radio frequency circuit module 8 to operate according to the set time. After the set working time, the radio frequency circuit module 8 is in a sleep state. In the sleep state, the trigger circuit is disconnected and the entire system is not powered, so zero power consumption. As can be seen from FIG. 4 and FIG. 5, the two-touch tactile switch 3 can be turned on by the driving of the magnetic trigger body 2 in the PIN card, that is, when the magnetic trigger body 2 approaches, the magnetic trigger body 2 is turned on. When leaving, the touch switch 3 is normally open. In standby mode, the circuit is in a zero-power state. When the card is read, the trigger body 2 in the password card 9 is magnetically triggered, and the magnetic switch 1 opens the working circuit of the card reading module to complete the entire card reading process. During the entire card reading process, both the PIN card 9 and the circuit work in a contactless manner.

The invention utilizes the constant magnetic force to trigger the operation of the radio frequency circuit, and the physical component is in effect, and is not affected by external conditions such as light, human body and the damage of the component itself, and has the characteristics of stability, safety and reliability.

6 shows an infrared trigger circuit used in the present invention, which mainly includes an oscillation circuit 601, an infrared emission circuit 602, an infrared reception and pulse output circuit 603, and a voltage stabilization circuit 604. The oscillating circuit 601 is mainly formed by connecting the integrated chip IC1 IC6 and its peripheral resistors and capacitors to generate an oscillating signal. The chip IC1 IC6 is model 74HC04. The infrared transmitting circuit 602 is formed by connecting the transistors Q1, Q2, the infrared transmitting tube T1 and its peripheral resistors, and the transistors Q1 and Q2 constitute a signal amplification driving circuit. The infrared receiving and pulse output circuit 603 is mainly formed by a transistor Q3, an infrared receiving tube T2 and its peripheral resistors and capacitors. Q3 and its peripheral resistors and capacitors form a trigger circuit, and its output terminal M0 is connected to the input terminal of FIG. Tr. The working principle is as follows: the oscillating circuit of the integrated chip 74HC04 as the main device drives the infrared tube to continuously output the pulse signal. When an object is close to the infrared tube, the object reflects the signal to the infrared receiving tube and outputs a trigger voltage when the threshold is reached.

Figure 7 is a schematic diagram of the RF circuit. The RF circuit shown in FIG. 7 is powered by a power supply and control circuit 701, a motor drive circuit 702, a card reader module 703, a microcontroller microprocessor 704, a buzzer circuit 705, a gating circuit 706, a data memory 707, a charging circuit 708, and an indication. The lamp circuits 709 are connected.

The power supply and control circuit 701 mainly includes a thyristor SCR and transistors Ql, Q2, and Q3 for supplying power to the entire radio circuit. It is powered by a PNP-type triode control power supply, and the thyristor SCR controls the on/off of the triode.

The motor drive circuit 702 is composed of eight triodes and constitutes an H-bridge circuit for controlling the forward and reverse rotation of the motor M. The card reading module 703 is composed of an integrated module ID and an inductor L. A magnetic field is generated by driving the inductor L with a 125 Khz signal generator. When the ID card senses a voltage exceeding a threshold of 2.5V in the sensing range, a signal is transmitted to the coil L, and the signal enters the demodulation line of the card reading module through the coil L, and becomes a TTL level signal, which is sent to the single chip system. decoding.

The single chip microcomputer system 704 mainly includes a single chip chip AT89C2051 and its peripheral crystal oscillator OCR1. The buzzer circuit 705 includes a buzzer BZ to form a sounding device. It can be audible according to the signal output by the single chip system 704.

The gating circuit 706 includes a photocoupler 0CT1, a rectifier bridge, a diode, a resistor, a capacitor, and a push button. Through the buttons, the MCU issues cards and deletes cards.

The data memory 707 includes a memory chip AT24C16 for storing related data such as an ID code. The charging circuit 708 includes a voltage stabilizing chip LM317 and its corresponding peripheral circuit. The indicator circuit 709 is formed by a light emitting diode.

According to the present invention, when the triggering of the trigger terminal Tr causes the card reading module 703 to be energized, the coil L of the card reading module forms an electromagnetic field around it, which ranges from about 5 to 10 mm (depending on the coil size;). When the password card enters the area, such as the ID card, when the coil induction voltage inside the ID card exceeds its threshold, the card returns a series of pulse signals to the card reading module 703, and the signal is the unique ID code of the card. The control unit in the card reader module 703, i.e., the microcontroller system 704, processes the received ID code and compares it with the ID code in the data memory 707. If the ID of this card has been stored in data memory 707, the unlocking task is performed; if the ID of this card is not in the data memory, the system does not respond.

Claims

Rights request:

1. A radio frequency circuit magnetic triggering device, characterized in that: a magnetic switch (1) is arranged in a trigger circuit of the radio frequency circuit module, corresponding to the magnetic switch (1), and a magnetic trigger body is arranged in the password card.

(2) The magnetic switch (1) is driven by the magnetic trigger body (2) to complete the operation of turning on or off the trigger circuit.

2. The radio frequency circuit magnetic triggering device according to claim 1, wherein: the magnetic switch (1) is composed of a reed switch, and correspondingly, the magnetic trigger body (2) disposed in the password card is composed of a magnet Composition.

3. The radio frequency circuit magnetic triggering device according to claim 2, wherein the magnet is in a block shape, a sheet shape or a granular shape.

4. The radio frequency circuit magnetic triggering device according to claim 1, wherein: the magnetic switch (1) is composed of a normally open type light touch switch, and the light touch switch is composed of two metal contacts (3). And the magnetic spring piece (4) is constructed, and correspondingly, the magnetic trigger body (2) provided in the password card is composed of a ferrous material.

5. The radio frequency circuit magnetic triggering device according to claim 1, wherein: the magnetic switch (1) is composed of a normally open type light touch switch, and the light touch switch is composed of two magnetic contacts (5). And the metal spring piece (6) is formed, and correspondingly, the magnetic trigger body (2) provided in the code card is composed of a ferrous material.

6. The radio frequency circuit magnetic triggering device according to claim 4 or 5, wherein the ferrous material is iron, iron or iron.