JPH0329087A - Wireless transmission module for security sensor - Google Patents

Abstract

PURPOSE:To add a function to always transmit a radio signal by making a wireless transmission circuit part including an antenna of a three-terminal wireless transmission module. CONSTITUTION:Power is supplied to the internal circuit of a wireless transmission module A through a pair of power terminals TV and TG of this module A; and when a test switch 1d is turned off, a modulation signal corresponding to a detection signal is outputted as a radio signal only at the time of operating a security sensor. When the test switch 1d is turned on, the radio signal is radiated from antennas ANT1 and ANT2 to a wireless receiver though the security sensor is not operated. Thus, the test switch 1d is set to transmit the radio signal from the transmission module independently of the state of the detection signal of the sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wireless transmission module incorporated into a security sensor when the security sensor is used as a wireless sensor. [Prior Art] Recently, many sensors such as heat ray sensors, temperature sensors, and gas sensors have been developed and are widely used for crime prevention and other purposes. Among such sensors, for example, there is a jiao sensor that detects heat rays emitted from the human body. # using elements! Wire sensors are often used as security sensors that detect intruders by installing them close to doors and windows, and sound an alarm. However, such security sensors are installed at the entrance and windows of each room in a residential unit.
In many cases, the configuration is such that the detection signals from each security sensor are transmitted to a separately placed security receiver for centralized monitoring, which requires a lot of wiring from multiple security sensors to the security receiver! The construction will be large-scale as it will be necessary to install In order to solve this workability problem, the detection signal of each security sensor is converted into a wireless signal such as a radio wave signal and output, and this wireless signal is transmitted to a wireless receiver to demodulate the detection signal. A wireless security sensor has been developed, and if you use such a wireless security sensor, there is no need to install wiring between the wireless receiver and the wireless security sensor. You can install the system. However, conventionally, this type of wireless security sensor has been constructed in such a way that the security sensor and wireless transmitter are configured separately, and the various security sensors are connected to a common wireless transmitter by replacing them. A wireless security sensor can be easily created by simply connecting a wireless transmitter to many types of security sensors, but it is necessary to install a security sensor and a wireless transmitter at each location where the sensor is to be installed. It was time-consuming and looked bad. On the other hand, with a structure in which a security sensor is integrated with a built-in wireless transmitter, manufacturing costs are high because a wireless transmitter with a different shape must be installed for each different security sensor. From this point of view, the present inventor proposed a transmission module in which the security sensor can be easily used as a wireless transmitter by simply incorporating it into the security sensor, in the same patent application. This is a further improvement. [Invention tries to solve! ! The present invention, proposed in view of the above circumstances, aims to provide a wireless transmission module with an added II function that constantly transmits radio signals. [Means for Solving the Problems] In order to achieve the above object, the wireless transmission module of the present invention is proposed to have an internal circuit supplied with electricity.
Group Den f! A wireless transmission module having an I#1 terminal and a horizontal L[a terminal for inputting a detection signal from a security sensor, and configured to convert the detection signal received from the security sensor into a radio wave signal and output it. A transmission control unit including a CPυ that outputs a variable vR signal in response to a detection signal from the security sensor, a high frequency oscillation/multiplier circuit that outputs a carrier wave of a radio signal, and a high frequency oscillation/multiplication circuit that outputs a carrier wave of a radio signal, and a transmission control unit that outputs a variable vR signal in response to a detection signal from the security sensor; Then, the above carrier wave is modulated and amplified to generate radio waves {! A high frequency amplification/modulation circuit that outputs a signal, a test switch that maintains the transmission control unit in an operating state regardless of a detection signal from the security sensor, and an antenna that transmits the radio signal into space are integrated. It is said to be composed of Further, as another embodiment of the present invention, the wireless transmission module proposed in claim 2 is configured to further include a setting switch for setting a unique ID code to the security sensor, and further includes a configuration switch that sets a unique ID code to the security sensor. The wireless transmission module further includes a setting switch that changes the tone of the detection signal from the security sensor. [Operation] In the present invention as set forth in claim 1, wireless. Power is supplied to the internal circuit of the transmission module through one set of power terminals, and when the test switch is turned off, it outputs a modulated signal corresponding to the detection signal only when the security sensor is activated, and becomes a radio wave signal. is output. However, when the test switch is turned on, a radio signal is radiated from the antenna to the wireless receiver even if the sexuality sensor is not activated. In the present invention as set forth in claim 2, when the ID code setting switch is used to set the D code, the set ID code is added to the radio signal transmitted from the wireless transmission module to the wireless receiver. So,
It is suitable for a system in which radio signals from multiple security sensors are received and processed by a single wireless receiver. Furthermore, in the present invention as set forth in claim 3, since the pattern of the detection signal from the security sensor can be changed and set, if the tone is made to correspond to the pattern of the detection signal, the wireless reception m side can set the sensor to make a sound. It can be easily identified by [Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The first (!!) is a diagram showing the wireless transmission module A of the present invention, (a) is a front view of the front side, and (b) is a front view of the back side. Transmission module A is
The members of the inner M circuit are attached to both the front and back surfaces of one printed circuit board PB, and the CPU constituting the transmission control section 1 is mounted on the front surface.
1a is mounted, and on the back side there are date switches 1b to 1d for controlling W settings, which will be described later, and two antennas A.
NTI and ANT2 are implemented. In addition, the center part of the print board @PB receives power supply from the outside.
The terminal is provided with power supply terminals TV and TO for I, and a detection terminal TS for inputting a detection signal from a security sensor. In the example, two antennas ANTI. The ANTs 2 are arranged orthogonal to each other, and an antenna switching signal is applied to each from the CPU 1a to constitute a polarization diversity antenna that alternately radiates radio signals. It is not limited to those configured with diversity antennas. ! FIG. 12 is a block diagram showing the internal circuit configuration of wireless transmission module 8.

The transmission control unit 1 includes a CPU 1a, and a high frequency oscillation/multiplication circuit 3 outputs a carrier wave of a radio signal, and a high frequency amplification/modulation circuit 4 receives a modulated signal sent from the control unit l. , is configured to modulate and amplify the carrier wave transmitted from the high frequency amplification/multiplication circuit 3 to output a radio signal, and the radio signal transmitted from the high frequency amplification/modulation circuit 1 & 4 is controlled by a switching signal from the CPU 1a. The configuration is such that power is fed to two antennas ANTI and ANT2 and radiated. le is a D code setting means that sets a unique ID code for the wireless transmission module A. When receiving radio signals from multiple wireless transmission modules A on the wireless receiver side, wireless transmission is performed using this ID code. Module A
It is designed to perform identification. In the configuration of the embodiment, even when power is supplied, by providing the energization control circuit 2, the energization control signal is output from the CPU IA only when a detection signal is input to the detection terminal TS, and high frequency oscillation is performed. /Multiplier circuit 3 and high frequency amplification/
Power is saved by the configuration that supplies power to the modulation circuit 4, but when the power is supplied, the high frequency oscillation/futupling circuit 113 is activated to transmit the radio signal of only the carrier wave to the antenna ATNI, 2. A configuration that allows more radiation may also be used. Note that the dip switch 1 provided in the CPU 1a of the transmission control section. b, lc are tone color changeover switches, and the data transmitted by the radio signal output when the detection signal is input can be set in four ways by the combination of the tone changeover switches lb, lc. The ringing sound on the side of the wireless receiver (not shown) that received the signal is switched to Pororon, Bibi, Buru Buru, Bing Bong, etc. Also, DIP switch 1d is a test switch,
While this switch is set to the ON side, even if the detection signal from the security sensor is not input, it will be in the same state as when it is input, and the antenna AN
The high frequency signal from TI,2 is l! Since the output is narrowed,
When installing a security sensor with a wireless transmitter module A embedded in it, sensitivity adjustment tests can be easily performed using a lever with a wireless receiver. This test switch 1d is
Normally this is set to off. In the wireless transmission module A having such a configuration, when a detection signal from a security sensor (not shown) is applied to the detection terminal TS, an energization control signal is output from the CPU 1a to the energization control circuit 2, and the high frequency oscillation/multiplier circuit 3
Then, the high frequency amplification/modulation circuit 4 is energized. On the other hand, the CPU 1a outputs a modulation signal containing the data set by the ID code setting means 1e and the tone changeover switches lb and lc to the high frequency amplification/modulation circuit 4, so that the carrier wave is modulated by the modulation signal. and is transmitted to the antenna ANTI,2 as a radio wave signal. These antennas 1 and 2 have a CPU. From 1a to rHJ level and rLJ level switching signals are applied alternately.At rLJ level, a high frequency signal is emitted from the antenna, but when rHJ level is added, the resonant frequency of the antenna is changed. The radiation of the high frequency signal is stopped and the high frequency signal is alternately stripped from the antenna ANTI,2. In other words, it is configured to output a high frequency signal to a wireless receiver II (not shown) as a polarization diversity antenna. According to the transmission module A having such a structure, the connector provided on the circuit board of the security sensor example,
Three terminals TV, TS. By connecting TG,
Security sensors can be easily used as wireless transmitters. Next, FIG. 3 is an illustration of the polarization diversity antenna used in the module of the present invention. Normally, when the receiving antenna is fixed with either vertical polarization or horizontal polarization, if the polarization plane of the transmitting antenna and the polarization plane of the receiving antenna are not matched, the received electric field strength will decrease (in principle If the plane of polarization is perpendicular to the antenna, it will not be received, but in reality, even a vertically polarized antenna has a horizontal polarization component, and the plane of polarization is rotated by surrounding objects, so the received electric field strength is (It has only declined). Therefore, it is necessary to install the transmitting antenna according to the installation situation of the receiving antenna, so the mounting direction is restricted, and if the polarization planes do not match, the received electric field strength will decrease. However, in a polarization diversity antenna, the transmission I1
(Alternatively, two antennas with orthogonal polarization planes for reception m> are switched alternately to output high-frequency signals with different polarization planes, so even if the installation direction changes, the influence of the received electric field strength can be reduced. In the wireless transmission module A of the invention, two U-shaped antennas arranged orthogonally to each other on the printed circuit board PB (in this embodiment, by connecting the U-shaped antenna and the u4Wi surface of the printed circuit board, (In this example, G radiation is stopped alternately) to the loop antenna), and if the printed board [PB is fixed perpendicular to the ground, A horizontally polarized high frequency signal is output from the antenna ANTI, and a vertically polarized high frequency signal is output from the antenna ANT2, regardless of the installation status of the wireless transmitter module A. Fig. 4 shows an example of a security sensor S (in this embodiment, a heat ray sensor) in which the wireless transmission module A of the present invention is incorporated. It is an exploded perspective view.This security sensor S has a copper plate 12. on the g4 side of the upper and lower covers 10.13 made of Blastic...7.
13, the lower cover 11 has a main board l4 on which the internal circuit of the security sensor is mounted, a board 15 that supports the battery inserted between the upper cover 10, and a main board l4. A sub-board l6 is attached and fixed to connect the main board 15 to the main board 14, and a wireless transmission module A connects a pair of electric fi terminals TV, TO and a detection terminal TS to the connector 14a of the main board 14. It is inserted and fixed. Also, top cover 1
0 rib 10a is provided with battery fittings 10b, 10c, and side plate l2 is provided with battery fittings 12a. 12b is provided to connect 311 batteries in series, and the positive ams of the three series-connected batteries are connected to the main board l4 via the lead wire l connected to the battery fitting 10a, In the negative electrode example, when the Confucian plate 12 is attached to the upper and lower covers 10.11, the battery fitting 12a and the spring 15a attached to the board 15 are brought into contact with each other, and the main board l4 is removed from the board 15.
Connect to the main board 1 by a lead wire (not shown).
It supplies power to 4. In addition, the upper cover 10 has llI
A pyroelectric element 10d, which is an IIm sensor, is attached and outputs a detection signal to the main board l4. Therefore, with this security sensor S, it is possible to immediately create a wireless security sensor by simply attaching the wireless transmission module A to the connector 14a, and various security sensors can be easily configured by having the same structure. It can be made wireless. 5th II! I am
It is an explanatory diagram of the present invention according to claim 3, and is an explanatory diagram of the above-mentioned fourth embodiment.
Parts corresponding to the explanations in the figure are given the same symbols.
The gist of the present invention is that the power supply line (positive voltage line and ground line) and the detection signal line to the wireless transmission module A are all connected via printed wiring on the main board 14. Insert ferrite beads into the jumper wire and connect it to 7L.
By having an impedance 114 for the b-frequency signal, the radiation efficiency of the antenna of the wireless transmission module A is improved by actively utilizing the property that the IN-frequency signal easily leaks into the power supply line including the ground line. This is what we are trying to do. In the figure, three batteries BT are connected in series, and the positive electrode is connected to the round 14b of the main board I4 via the lead wire 11 connected to the battery metal fitting 10b. Further, the negative electrode side is connected to the round l4c of the main board 14 via the battery fitting 12a, a spring 15a fixed to the board 16, and a lead &I 12. The negative electrode copper is wired from the round 14c to the bin corresponding to the terminal TG of the connector 14a via the ground line P5 of the main board 14, while the positive electrode round 14b is connected to the main board [14] via the printed wiring Pi. Frontage provided 14
d, and is connected to the positive voltage line P4 of the main board 14 via the printed wiring P2, jumper wire lea, and printed wiring P3 of the sub board 16, and corresponds to the power terminal TV of the connector 14a by this positive voltage line P4. It is connected to the bin. Then, the jumper wire lea provided on the sub-board 16 has a ferrite bead FB.
It is said that 2116 are attached. Note that the sub-board 16 is located at the frontage 14d of the main board 14 and the board 15. 1
5b, and the tl4* side of the printed circuit board is soldered. In such a configuration, from wireless transmitting module A to 1! A part of the emitted high frequency signal is transmitted through the positive voltage line P4,
The high frequency signal leaking to the ground line P5 and to the positive voltage line P4 is prevented from leaking by the ferrite beads FB of the sub-board. Therefore, depending on the frequency of the radio wave signal, the pattern design of the wireless transmission module A, etc., by providing the ferrite T bead FB at a position where the maximum radiation efficiency can be obtained from the antenna,
It becomes possible to radiate radio signals efficiently,
Moreover, wireless transmission module A and main board l4
Since all of these are printed wiring, there is no change in stray capacity as would be the case when connecting with lead wires, so if you manage the transmission output of wireless transmission module A, it will be possible to It is also possible to make the transmission output stable. In this embodiment, the ferrite bead FB is not provided because there is little leakage of high frequency waves on the ground line side. It is also possible to improve the error efficiency. [Effects of the Invention] According to the present invention proposed in claim 1, by making the wireless transmission circuit section including seven antennas into a three-terminal wireless transmission module, it can be easily incorporated into the security sensor of Tatsuchi. Moreover, by setting the test switch, the transmitting module can transmit a radio signal regardless of the sensor's detection signal.
It is also suitable for checking the installation position of a sensor that includes a transmitting module and the range of radio waves. Claim 2
According to the present invention proposed in , it is possible to add an ID code to a radio signal transmitted from a wireless transmission module, so it is suitable for a crime prevention system incorporating a plurality of wireless transmission modules. Further, according to the present invention proposed in claim 3, the wireless receiver side that receives the radio wave signal emitted from the wireless transmission module can output signal tones of different tones, so that the sensor activated by the tone can be Easy to identify.

[Brief explanation of drawings]

FIG. 2 is a front view of the front and back sides of the wireless transmitting module of the present invention, FIG. 2 is a block diagram thereof, FIG. 3 is an explanatory diagram of the polarization diversity antenna, and FIG. 4 is a front view of the wireless transmitting module of the present invention. Figure 5 is an exploded perspective view showing the structure of the security sensor to be incorporated, and Figure 5 is an exploded perspective view explaining the operation when ferrite beads are installed. This is a diagram. [Explanation of symbols] TV, TG...Power supply terminal TS...Detection terminal A...Wireless transmission module 1a...CPU 1...Transmission control Ilg 3...High frequency generator/multiplier circuit 4. ...High frequency amplification/change circuit ANTI. ANT2・■Antenna 14a...Connection part (connector) P4, Pδ...Power line (positive voltage line, ground line) 16a-◆・Jumper wire FB...Ferrite bead connection Fig. 1

Claims (3)

[Claims] (1) It has a pair of power terminals that receive power supply from the internal circuit and a detection terminal that inputs the detection signal from the security sensor, and converts the detection signal received from the security sensor into a radio wave signal and outputs it. A wireless transmission module configured to include a transmission control section including a CPU that receives a detection signal from the security sensor and outputs a corresponding modulation signal, and a high frequency oscillation/multiplication circuit that outputs a carrier wave of a radio signal. and a high frequency amplification/modulation circuit that receives the modulation signal, modulates and amplifies the carrier wave and outputs a radio signal, and maintains the transmission control unit in an operating state regardless of the detection signal from the security sensor. A wireless transmission module for security sensors that integrates a test switch and an antenna that radiates the radio signal into space. (2) The wireless transmission module for security sensors according to claim 1, wherein the wireless transmission module for security sensors further includes a setting switch for setting an ID code unique to the security sensor. (3) The wireless transmission module for security sensors according to claim 1, wherein the wireless transmission module for security sensors further includes a setting switch for changing the detection signal from the security sensor by changing the tone color.