JPH02183397A - Radio guard system containing transmission checking function - Google Patents

Abstract

PURPOSE:To easily check the radio transmission state by using a control means which stores the transmitting frequency of the transmission request signals and the receiving frequency of the answer signals from a transponder. CONSTITUTION:A repeater 3 includes a transmission part which transmits the transmission request signals to the transponders 2a - 2n, a reception part which receives the answer signals in response to the transmission request signals sent from the transponders 2a - 2n, and a control means which stores the transmitting frequency of the transmission request signals and the receiving frequency of the answer signals received from the transponders. Then a reception rate is calculated from the transmitting and receiving frequencies. As a result, the radio transmission state is easily known and therefore a radio transmission/ reception device can be set at a most proper position. Thus a guard system is attained with high reliability.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a wireless system that detects an abnormality such as the occurrence of a fire within a security area or the occurrence of an intruder within the same area, and transmits the detected abnormality using a wireless signal. The present invention relates to a security system, and particularly to a security system having a function of checking radio propagation status.

[Conventional technology]

BACKGROUND ART Various security systems using wireless technology have been proposed and implemented to simplify wiring work and improve aesthetics.

For example, sensors that detect various abnormalities placed within the Wi-Fi area, wireless transmitters installed near these sensors that transmit abnormality information using weak radio waves, or weak radio waves from multiple wireless transmitters. A wireless security system is equipped with a wireless receiver that receives information, a control device that connects to the wireless receiver and centrally monitors abnormal signals, and a communication device that sends abnormality information via a communication line to an external control center. be.

[Problems to be Solved by the Invention] In the wireless security system 1, for example, the layout of furniture, etc. in the security area is often changed.
If you change it, the propagation status of radio waves between the wireless transmitter and the wireless receiver will change, and the wireless receiver may not be able to receive the weak radio waves sent out from the wireless transmitter, or the reception quality may deteriorate.

However, the above-mentioned wireless security system has a problem in that in such a case, it is incorrectly determined that the wireless transmitter or the wireless receiver is malfunctioning.

In addition, in wireless security systems, it is necessary to install a wireless transmitter or radio receiver in a position where the radio propagation situation is optimal, but there is a problem in that it takes a lot of time and effort to check the radio propagation situation. be.

The purpose of the present invention is to solve the above-mentioned problems, and to propose a wireless security system that can easily check the radio propagation situation and install a wireless transmitter and a wireless receiver at an optimal position. It is in.

[Means for Solving the Problems and Effects] According to the present invention, there are provided at least one detector, a transponder connected to the detector, and a repeater that wirelessly transmits and receives signals to and from the transponder. In the security system, the repeater includes a transmitter that sends a call request signal to the transponder, and a receiver that receives a response signal from the transponder to the call request signal. A wireless security system having a propagation function is provided.

The wireless communication may be performed using weak radio waves.

The repeater may include a display means to display the number of times of transmission and the number of times of reception.

C Embodiment] Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

FIG. 1 is a block diagram showing the configuration of a wireless security system according to an embodiment of the present invention. 1a~1! 2a to 2m are detectors (sensors) that detect abnormalities, etc., and 2a to 2m are sensors for detecting abnormal signals from the detectors and transmitting them via the antenna, or receiving command signals via the repeater 3 described later. Indicates transponder. The repeater 3 transmits and receives No. 15 using weak radio waves with the transponder 1 to the transponder 2, and transmits and receives signals by wire via a communication line 4 to a controller 5, which will be described later. 4 is a communication line connecting the repeater 3 and the controller 5; 5 is a controller that sends and receives signals to and from the repeater, sets various modes, displays abnormalities, etc., or sends signals to an external control center 7; , 6 are communication lines such as public lines. A control center 7 is connected to the controller 5 through a communication line 6 and centrally monitors a plurality of security areas (one of which is indicated by A) remotely.

FIG. 2 is a block diagram showing a part of each of the constituent means explained in FIG. 1. 1 collectively indicates detectors that detect various abnormalities. The transponder 2 includes a detection unit 21 connected to the detector 1 and inputting the detection state of the detector 1;
1 to a control unit 22 that performs various controls within the lance bonder 2;
Wirelessly transmits various signals with address numbers (described later).
For example, a transmitting section 23 that sends out weak radio waves, a receiving section 24 that receives a wireless signal from the repeater 3, an address setting section 25 that sets the address of the transponder, and a power source 26 that supplies power to each of the above sections. For example, it is configured to include a battery power source and an antenna 27 for wireless transmission and reception. The repeater 3 includes an antenna switching unit 31 that selects and switches each antenna described later, a control unit 32 that performs various controls within the repeater 3, and a transmitter 33 that wirelessly sends command signals and the like to the transponder 2. A receiving section 34 receives the radio signal from the L transponder 2, an address setting section 35 sets the address of the repeater 3, and DC power is input from the controller 5 to supply DC power to each section. a communication unit 37 for transmitting and receiving signals via a communication line 4 with a controller 5 to be described later, and antennas 38A, 38B, and 38C for transmitting and receiving signals wirelessly with the transponder 2. It is equipped with and configured. The controller 5 includes a communication section 51 that transmits and receives signals via the repeater 3 and the communication line 4, a control section 52 that performs various controls within the controller 5, an input section 53 that performs mode settings, etc., and an abnormality information Display section 5 that displays etc.
4, a transmitting section 55 for sending a signal to the external control center 7, and a power source 56 that generates DC power from AC power and supplies the DC power to each section and the repeater 3. .

Next, the antenna 38A, antenna 38B, and antenna 38C of the repeater 3 will be explained. In this example,
It uses weak radio waves as a wireless signal.

When communicating indoors, these radio waves reach the space between the transponder 2 and the repeater 3 while reflecting off walls, furniture, and the like.

Therefore, there are places where radio waves are interfered with and attenuated. If the antenna of the repeater 3 or transponder 2 is located at the location where the signal is attenuated, reception becomes impossible. In addition, the plane of polarization of radio waves gets mixed up due to reflections from walls, ceilings, floors, etc.
Radio waves transmitted with vertical polarization may be replaced with horizontal polarization at the receiving point. Here, these antennas 38
The relationship between A, 38B, and 38C is shown in FIG. The distance between the antenna 38A and the antenna 38B is the wavelength of the radio wave (λ
), or at an interval of λ/4, and has the effect of spatial diharsity. and antenna 38C
It is installed between the antennas 38A and 38B in a direction perpendicular to the antennas 8A and 38B, and has the effect of polarization diversity. With this arrangement, even if the propagation conditions change, normal reception is possible using one of these antennas.

In the wireless security system of this embodiment, the operator inputs the desired security mode into the input section 53 of the controller 5, for example, "security (hereinafter abbreviated as set)", "security release (hereinafter abbreviated as release)", "patrol ”, etc. While the security mode is set, if the detector 1, for example an intrusion detector, detects an abnormality, a detection signal is transmitted to the controller 5 via the transponder 2 and the repeater 3. Further, if the detector 1 is a detector for fire, gas leak, etc., an abnormality signal is sent to the controller 5 in the same way as described above even if the security mode is set to "release mode".

However, in the unlikely event that a failure or the like occurs in the detector 1, the condition of each detector 1 must be checked periodically because the abnormality cannot be detected even if it occurs. Furthermore, when changing the security mode from being released to being set, it is necessary to check whether each detector 1 is normally in the monitoring state.

As shown below, the controller I/roller 5 checks the status of the detector 1 as necessary.

Next, the operation of transmitting and receiving signals between the repeater 3 and the transponder 2 will be described with reference to flowchart 1 in FIG. FIG. 4(a) shows the operation of the repeater 3, and FIG. 4(b) shows the operation of the repeater 3.
) indicates the operation of the transponder 2.

The controller 5 sends a one-ring signal to the repeater 3 as necessary. This polling signal is, for example, a signal that requests each repeater to send information at fixed time intervals when the security mode is changed or during setting.

is received by the communication section 37 of the repeater 3 and manually inputted to the control section 32. When the control unit 32 receives the f-ring signal from the controller 1-roller 5 (FIG. 4(a), step O1), it counts up the transmission number counter built in the control unit 32 (step 02), The transmitter 33 is driven, and the antenna 3 is transmitted to the transponder 2, for example.
A command signal is transmitted using weak radio waves at 8A (step 03).

Step 21 The transponder 2 sends the above command signal to the antenna 2.
7 (step 21 in FIG. 4(b)). The control unit 22 of the transponder 2 transmits a response signal, such as a status signal, in response to the received command signal (step 22). For example, if the monitoring detectors 1a and 1c are normal for the periodic signal being set, a signal to that effect is transmitted to the repeater 3. Further, if there is an abnormality in either the detector 1a or Ic, a signal to that effect is transmitted to the repeater 3 via the transmitter 23.

Steps 04, 11, 12, 13 Next, repeater 3
First, the antenna 38A is used to receive a radio signal from the transponder 2 (step 04). Here, when the receiving unit 34 is able to receive a signal through the antenna 38A, it inputs the content to the control unit 32 and at the same time counts up the number of receptions on the antenna 38β transmission frequency counter in the control unit 32 (step 11). At the same time, the OK double signal transmitter 33 sends an OK signal to the transponder 2 for confirmation of reception (step 12), and the communication ends (step 13).

If, as will be described later, the antenna 38A cannot receive signals normally due to changes in the characteristics of indoor wireless communication, that is, if it cannot receive signals normally within the time set for each transponder in advance, The control unit 32 switches the antenna switching unit 3H from the iron antenna 38A to the antenna 38B (step 05) and retransmits the two-coined signal (step 0).
6).

In the transponder 2, after transmitting the status signal (step 22), if it is received by the OK double signal receiving section 24 sent from the repeater 3 within a certain period of time (step 23),
It is determined that the communication has been established normally, and the communication is terminated.

If 0K (No. 8) cannot be received within a certain period of time, the already transmitted status signal is retransmitted (step 22) in response to the command signal received again (step 21).

Steps 07.11 and 12.13 In the repeater 3, the retransmitted status signal is now received by the switched antenna 38B (step (step 0
7), the control unit 32 switches the antenna switching unit 31 from the antenna 38B to the antenna 38C (step 0).
Retransmit the 8-input command signal (Step 09).

When the transponder 2 receives the OK signal (step 123), it determines that the communication has been carried out normally and terminates the communication. If the OK double signal is not received, the status signal is transmitted again in response to the received command signal reception (step 21) (step 22).

Steps 10, 11, 12: The repeater 3 uncounters the retransmitted status signal from call 1 to step 11), sends it to the OK double signal transponder 2 (step 12), and terminates the communication (step 13). Therefore, if the command signal is normally received by the antenna 38B, the next command signal will be transmitted from the antenna 38B.
Performed by 8B.

Count up the number of reception counters (step 11)
). Therefore, if the command signal is received by the antenna 38C, the next command signal will be transmitted by the antenna 38C. If the antenna 38C also fails to receive data, it is determined that communication with the transponder 2 of the repeater 3 is impossible, and the communication is terminated (step 13).

Next, communication abnormality information is sent to the repeater or controller 5.

Further, in the present embodiment, communication between one repeater 3 and one 1-lance bonder 2 has been described, but communication is normally performed between one repeater 3 and a plurality of transponders 2.

In this case, to explain the operation flow of the repeater shown in FIG. 4(a), in step 04, it is determined whether the status signals of all 1-lance bonders subordinate to one repeater have been received. If there is a transponder that has not been received, it is determined in step 07 that the antenna is switched to the antenna 38B in the same manner as described above, and whether or not the transponder has received the transponder signals of all the unreceived 1-rance bonders. If there is a transponder that has not been received, the antenna is switched to the antenna 38C in the same manner as described above. In step 10, it is determined whether status signals of all unreceived transponders have been received. If there is a 1 to Lance bonder that has not yet been received, the repeater 3 sends communication abnormality information to the controller 5 to terminate the communication.

#Next, a method of displaying and checking the wireless propagation status between the repeater 3 and the transponder 2 using the controller 5 will be described.

2. In the manual section of the I-RA 5, specify the preset address of the repeater 3 and input a propagation status display request signal. The controller 5 sends a propagation status request signal to the corresponding repeater 3 via the communication line 4. When the corresponding repeater 3 receives the propagation status request signal via the communication unit 37, the control unit 32 determines the number of lance bonders 1 to 1 that are monitored by the repeater 3 and the transmission information stored in the control unit 32. The number of transmissions and the number of times of reception by the antennas 38A, 38B, and 38C of each transponder are shown in FIG. 5. The number of transmission for command transmissions is shown in the operation flow of the repeater in FIG. 4(a). This is the number in step 02, and the number of one transponder is the number of transponders (1
G) Ntep-3B (control unit 5 formed on the transmission forman 5 sequentially with 2% communication frequency as one set)
2 for each transponder'/antenna 38A38B, 3
Divide the number of receptions of 8C by the total J1C number of receptions. Then, the calculation result (reception (8 rate)) is displayed on the display unit 54, for example, in three stages in descending order of reception rate.Therefore, the operator can judge whether the radio wave propagation condition is good or not.

The above explanation assumes the case of normal communication, but for example, when determining the position of transponder 2 and repeater 3 when setting up a security system, etc. For example, if you send out 10 commands in succession and display the reception rate of the number of receptions from 1-Lance Bonder 2 in the same way as above, even if there is no past accumulated data, The radio wave propagation check status of each 1-lance bonder 2 and repeater 3 can be easily checked, and it can be determined whether the installation of each device is appropriate.

Furthermore, as another embodiment, the repeater may be provided with a display section to display the wireless propagation status on the repeater. This allows for a propagation check near the repeater.

Further, in this embodiment, the wireless means is explained using radio waves, but ultrasonic waves or infrared rays may also be used. That is, wireless in the present invention means something other than wired.

Also, here, the types of antennas are 38A and 3883.
Although three types of antennas (8C) are used, as described above, it is sufficient to arrange a plurality of antennas so that the most suitable one can be selected by switching the antennas, and the number is not limited to three types.

Furthermore, in this embodiment, antennas 38A, 38B and 3
Even when switching the antenna of 8C, if there is a transponder that has not been received, the communication is deemed to be impossible and the communication is terminated, but it is also possible to so-try several times.

[Effects of the Invention] According to the present invention, since the radio propagation situation can be easily seen in a wireless security system, a wireless transmitter/receiver can be installed at the most appropriate position, and a security system with extremely high signal accuracy can be achieved. 1
, can be provided.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram of the security system of the present invention, Fig. 2 is a block diagram of each part of the block in Fig. 1, Fig. 3 is a layout diagram of the antenna in Fig. 2, and Fig. 4 is an operational flow diagram of Fig. 2. Char I., FIG. 5 is the transmission format. (Explanation of symbols) ■...Detector, 2...Transponder, 3...
...Repeater, 5...Controller. Operation flow of one transponder (b)

Claims (1)

[Claims] 1. A security system comprising at least one detector, a transponder connected to the detector, and a repeater that wirelessly transmits and receives signals to and from the transponder, wherein the repeater comprises a transmitter that sends a call request signal to the transponder, a receiver that receives a response signal from the transponder to the call request signal, and a receiver that determines the number of times the call request signal is transmitted and the number of times the response signal is received from the transponder. A wireless security system having a propagation check function, characterized in that it has a control means for storing information. 2. The wireless security system having a propagation check function according to claim 1, wherein the wireless communication is performed using weak radio waves. 3. Claim 1 or 2, wherein the repeater is equipped with a display means to display the number of times of transmission and the number of times of reception.
A wireless security system with the described propagation check function. 4. The repeater has a plurality of antennas arranged to have different reception characteristics, and has an antenna switching unit that sequentially switches the antennas when a response signal from the transponder cannot be received normally, 4. The wireless security system with a propagation check function according to claim 1, wherein an antenna having a suitable reception characteristic can be selected. 5. A controller connected to the repeater; the controller includes a communication unit that sends a request signal for the number of transmissions and the number of receptions to the repeater; 5. The wireless security system with a propagation check function according to claim 4, further comprising a display unit that calculates and displays the situation.