TWI485657B - Door security system - Google Patents

Description

Access control system

An access control system, especially when judging the moving direction of the active proximity card to move the active proximity card toward the host, speeding up the transmission of the control signal of the active proximity card to prevent the active proximity card from waiting for the host to perform control Signal.

According to the current control system, most of the ingress and egress control systems use the active proximity card carried by the user to send control signals to the host for execution in an intermittent manner. Therefore, when the user approaches the host, the host automatically executes the control signal, which is quite convenient. However, this method is likely to cause the host to handle too many unnecessary control signals. Therefore, the inventor of the present invention developed an access control device with a control area setting, which mainly defines the effective number by using the signal strength value set by the host. A receiving range is avoided to prevent the host from processing too many unnecessary control signals, or the control signals sent by the active proximity card are simultaneously executed by multiple hosts. However, since the active proximity card sends the control signal intermittently, the active proximity card is often sent to the host for the first time after the first receiving range of the host, and the control signal is generated for a period of time, causing the host to wait for the control signal to be insufficient for the user to wait. .

Therefore, how to solve the above-mentioned problems and shortcomings is the subject of research and development that the relevant industry is eager to develop.

The main purpose of the present invention is to utilize the host to compare the active proximity card shift When the active proximity card is moved toward the host, the host first sends a change signal to allow the active proximity card to intermittently send control signals at shorter intervals to avoid waiting for the host to execute the control signal. .

In order to achieve the above objective, the access control system of the present invention has a host and an active proximity card, and the host defines a first receiving range, and the active proximity card intermittently sends a control signal to the host at a first interval, when active When the proximity sensor sends a control signal within the first receiving range defined by the host, the host determines the moving direction of the active proximity card. If the active proximity card approaches the host, the host sends a change signal to the active proximity card. The active proximity card intermittently issues a control signal at a second interval, and the second interval time is shorter than the first interval time.

1‧‧‧Host

11‧‧‧First microprocessor

111‧‧‧First signal receiving intensity setting

112‧‧‧Second signal reception intensity setting

12‧‧‧First signal receiving/transmitting device

121‧‧‧First receiving sensitivity

2‧‧‧Active proximity card

21‧‧‧Second microprocessor

211‧‧‧First interval

212‧‧‧Second interval

22‧‧‧Second signal receiving/transmitting device

3‧‧‧First receiving range

4‧‧‧First effective range

5‧‧‧Parking

51‧‧‧ entrances and exits

52‧‧‧Parking lane

53‧‧‧Parking area

54‧‧‧ entrance and exit lane

6‧‧‧Reading

61‧‧‧Third signal receiving/transmitting device

611‧‧‧second receiving sensitivity

62‧‧‧ Third microprocessor

621‧‧‧second signal receiving intensity setting

7‧‧‧second receiving range

8‧‧‧second effective range

The first figure is a block diagram of a first preferred embodiment of the present invention.

The second figure is a schematic view (1) used in a parking lot according to a first preferred embodiment of the present invention.

The third figure is a schematic view (2) used in a parking lot according to a first preferred embodiment of the present invention.

The fourth figure is a schematic diagram (3) used in a parking lot according to a first preferred embodiment of the present invention.

The fifth figure is a schematic view (4) used in the parking lot according to the first preferred embodiment of the present invention.

Figure 6 is a block diagram of a second preferred embodiment of the present invention.

The seventh figure is a schematic view (1) used in a parking lot according to a second preferred embodiment of the present invention.

The eighth figure is a schematic view (2) used in a parking lot according to a second preferred embodiment of the present invention.

Figure 9 is a block diagram of a third preferred embodiment of the present invention.

Referring to the first figure and the second figure, it can be clearly seen from the figure that the access control system of the present invention has a host 1 and an active proximity card 2, wherein: the host 1 is provided with a first microprocessor 11. The first microprocessor 11 is connected to the first signal receiving/transmitting device 12, the first signal receiving/transmitting device 12 has a first receiving sensitivity 121, and the first receiving sensitivity 121 is the first signal receiving/transmitting device. The receiving range of 12 defines a first receiving range 3, the first microprocessor 11 is configured with a first signal receiving strength setting value 111, and the first signal receiving intensity setting value 111 is the first signal receiving/transmitting device 12 A receiving range 3 defines a first effective range 4, and the first receiving range 3 is greater than the first effective range 4.

The active proximity card 2 is provided with a second microprocessor 21, the second microprocessor 21 is connected to a second signal receiving/transmitting device 22, and the second microprocessor 21 is set with a first interval 211 and a second interval. Time 212, and the first interval time 211 is longer than the second interval time 212, and the active proximity card 2 causes the second signal receiving/transmitting device 22 to issue control signals in an interval according to the first interval time 211.

The first signal receiving/transmitting device 12 of the host 1 may be omnidirectional or directional, and the first receiving sensitivity 121 of the first signal receiving/transmitting device 12 defines the receiving range of the first signal receiving/transmitting device 12. When the first receiving range is 3, for example, when the first receiving sensitivity 121 is -96 DBM, the first signal receiving/transmitting device 12 can only receive the signal whose signal strength is greater than -96 DBM, because the second signal receiving of the active sensing card 2 is After the transmitting device 22 sends out the control signal, the control signal will be intensified due to the distance transmitted and the external environment. Therefore, if the active sensing card 2 is too far away from the host 1, the control signal sent by the active sensing card 2 is transmitted to the control signal. In the case of the host 1, the control signal strength is attenuated to below -96 DBM, and the first signal receiving/transmitting device 12 cannot receive the control signal, so that the active proximity card 2 must be closer to the host 1 to reduce the attenuation of the control signal, so that the control signal can be transmitted. When the first signal receiving/transmitting device 12 is connected, the control signal strength reaches -96 DBM or more, so that the control signal is received by the first signal receiving/transmitting device 12; Since the first microprocessor 11 is configured with the first signal receiving strength setting value 111, the signal strength set by the first signal receiving intensity setting value 111 is greater than the first receiving sensitivity of the first signal receiving/transmitting device 12 For example, the first receiving sensitivity 121 is -96 DBM, and the first signal receiving intensity setting value 111 is -50 DBM, when active sensing After the second signal receiving/transmitting device 22 of the card 2 sends a control signal, if received by the first signal receiving/transmitting device 12, the signal strength representing the control signal is greater than the first receiving sensitivity 121, that is, the signal strength is greater than -96 DBM, At this time, the first signal receiving/transmitting device 12 transmits the control signal to the first microprocessor 11 to let the first microprocessor 11 compare the signal strength of the control signal to be greater than or equal to the first signal receiving intensity setting value 111. If the control signal strength is -80 DBM, that is, the signal strength of the control signal is lower than the first signal reception strength setting value 111, the first microprocessor 11 does not execute the control signal, and if the control signal strength is -40 DBM, that is, The signal strength of the control signal is greater than the first signal receiving strength setting value 111, and the first microprocessor 11 executes the control signal; thereby, the first signal of the first microprocessor 11 receives the intensity setting value 111 at the first signal. A first effective range 4 is defined within the first receiving range 3 of the receiving/transmitting device 12, and the first receiving range 3 is greater than the first effective range 4.

Referring to the first and third figures, taking the parking lot 5 as an example, the host 1 of the present invention is installed in the entrance and exit 51 of the parking lot 5, and the first effective range 4 of the host 1 covers the parking at the entrance 51. Lane 52, while the first receiving range 3 of the host 1 covers the parking area 53, but the active proximity card 2 located in the parking area 53 receives the control signal after receiving the host 1 and the first microprocessor 11 Whether the signal strength of the comparison control signal is greater than or equal to the first signal reception intensity setting value 111, since the control signal strength is less than the first signal reception intensity setting value 111, the first microprocessor 11 does not execute the control signal, thereby Host 1 does not perform unnecessary control signals because the first receiving range 3 is too large.

Referring to the first figure and the fourth figure, it can be clearly seen from the figure that when the active proximity card 2 moves within the first receiving range 3, the host 1 will compare the active sensing card 2 to the current one. Whether the signal strength of the control signal sent is greater than the signal strength of the control signal received by the previous host 1, and if the signal strength of the control signal is greater than the signal strength of the previous control signal, the active proximity card 2 is moved toward the host 1, When the active proximity card 2 is ready to pass through the entrance 51 of the parking lot 5, the host 1 sends a change signal to the active proximity card 2, and the active proximity card 2 intermittently sends a control signal at the second interval 212 to speed up the control signal. The interval sending speed allows the active proximity card 2 to immediately send out the control signal for the host 1 to execute when entering the first effective range 4.

Moreover, after receiving the control signal sent by the active proximity card 2, the host 1 compares with the control signal sent by the active proximity card 2 in the previous period of time, by using multiple signals. The intensity comparison is used to more accurately determine whether the active proximity card 2 is moving toward the host 1.

Please refer to the first figure and the fifth figure. As can be clearly seen from the figure, when the active proximity card 2 moves within the first receiving range 3, the host 1 will compare the active sensing card 2 to the current one. Whether the signal strength of the control signal sent is greater than the signal strength of the control signal received by the previous host 1. If the host 1 compares the active proximity card 2, the control signal strength is less than that received by the previous host 1. The signal strength of the incoming control signal indicates that the active proximity card 2 is moving away from the host 1, and no change signal is issued.

Referring to the sixth and seventh figures, it can be clearly seen from the figure that the second preferred embodiment of the present invention is different from the first preferred embodiment described above in the host of the second preferred embodiment. 1 is connected to a read head 6, which is disposed in the entrance and exit lane 54 of the parking lot 5, and the read head 6 has a third signal receiving/transmitting device 61, and the third signal receiving/transmitting device 61 has a second receiving sensitivity 611, and The first microprocessor 11 of the host 1 is further configured with a second signal receiving intensity setting value 112, and the second receiving sensitivity 611 defines a receiving range of the third signal receiving/transmitting device 61 to a second receiving range 7, and second The signal reception intensity setting value 112 defines a second reception range 7 of the third signal receiving/transmitting device 61 to define a second effective range 8, and the second receiving range 7 is greater than the second effective range 8.

Referring to the sixth and seventh figures, it can be clearly seen from the figure that when the active proximity card 2 moves within the second receiving range 7, the third signal receiving/transmitting device 61 of the reading head 6 receives To the control signal sent by the active proximity card 2, and transmit the control signal to the host 1, the host 1 will be stronger than the previous host 1 than the control signal sent by the active proximity card 2 The received signal strength of the control signal. If the signal strength of the control signal is greater than the signal strength of the previous control signal, and the active proximity card 2 moves toward the read head 6, the host 1 sends a change signal from the read head 6 to the active The proximity card 2 causes the active proximity card 2 to intermittently send control signals at the second interval 212 to speed up the interval of sending the control signals, so that the active proximity card 2 can be instantaneously entered when entering the second effective range 8. The control signal is sent out and transmitted by the read head 6 to the host 1 for execution.

Furthermore, when the host 1 receives the control signal sent by the active proximity card 2 transmitted by the read head 6, it compares with the control signal sent by the active proximity card 2 in the previous period. Yes, by multiple signal strength comparisons, it is more correctly judged whether the active proximity card 2 is moving toward the read head 1.

Referring to FIG. 6 and FIG. 8 , when the active proximity card 2 moves within the second receiving range 7 , the third signal receiving/transmitting device 61 of the read head 6 receives the active proximity card 2 . The control signal is transmitted to the host 1 , and the host 1 compares the signal strength of the control signal sent by the active proximity card 2 with the signal strength of the control signal received by the previous host 1 If the signal strength of the control signal is less than the signal strength of the previous control signal, and the active proximity card 2 is moved away from the read head 6, no change signal is issued.

Referring to the ninth figure, it can be clearly seen from the figure that the third preferred embodiment of the present invention is different from the foregoing second preferred embodiment in that the read head 6 is provided with a third microprocessor 62, and The third microprocessor 62 has a second signal receiving intensity setting value 621, so that the third signal receiving/transmitting device 61 of the read head 6 receives the active sensing card 2 If the control signal sent by the third microprocessor 62 is greater than the signal strength of the control signal sent by the active proximity card 2, the signal strength of the control signal received by the previous read head 6 is controlled. The signal strength of the signal is greater than the signal strength of the previous control signal, and the active proximity card 2 is moved toward the read head 6, and the read head 6 sends a change signal to the active proximity card 2, so that the active proximity card 2 is at the second interval. 212 intermittently sends a control signal to speed up the interval of the control signal transmission, so that when the active proximity card 2 enters the second effective range 8, the control signal can be sent out immediately and transmitted by the read head 6 to the host 1.

Therefore, the present invention solves the conventional problems and defects. The key technology is to compare the control signal strength issued by the active proximity card 2 in the first receiving range 3 to determine the direction in which the active proximity card 2 moves. When the active proximity card 2 is moved toward the host 1 , the host 1 first sends a change signal to cause the active proximity card 2 to intermittently send a control signal at a second interval 212 to enable the active proximity card. 2 When entering the first effective range 4, the control signal can be immediately sent to the host 1 to avoid waiting for the host 1 to execute the control signal.

1‧‧‧Host

11‧‧‧First microprocessor

111‧‧‧First signal receiving intensity setting

12‧‧‧First signal receiving/transmitting device

121‧‧‧First receiving sensitivity

2‧‧‧Active proximity card

21‧‧‧Second microprocessor

211‧‧‧First interval

212‧‧‧Second interval

22‧‧‧Second signal receiving/transmitting device

Claims (9)

An access control system has a host and an active proximity card. The host defines a first receiving range. The active proximity card intermittently sends a control signal to the host at a first interval, when the active proximity card is located at the host. When the control signal is sent within the first receiving range, the host will judge the moving direction of the active proximity card. If the active proximity card approaches the host, the host sends a change signal to the active proximity card, so that the active proximity card can The second interval intermittently issues a control signal, and the second interval is shorter than the first interval. For example, in the access control system described in claim 1, wherein the host determines whether the signal strength of the control signal sent by the active proximity card is greater than that of the active proximity card. If the signal strength of the control signal received by the previous host is greater than the signal strength of the previous control signal, the host sends a change signal to the active proximity card. If the host compares the active proximity card, The signal strength of the control signal sent by the second time is less than the signal strength of the control signal received by the previous host, and no change signal is issued. The access control system of claim 1, wherein the host is provided with a first microprocessor, the first microprocessor is connected to the first signal receiving/transmitting device, and the first signal receiving/transmitting device has the first a receiving sensitivity, the first receiving sensitivity defines a receiving range of the first signal receiving/transmitting device to define a first receiving range, and the first microprocessor sets a first signal receiving intensity setting value, and the first signal receiving intensity setting value The first receiving range of the first signal receiving/transmitting device is defined as a first effective range, and the first receiving range is greater than the first effective range. The access control system of claim 1 or 3, wherein the host is provided with a first microprocessor, the first microprocessor is connected to the first signal receiving/transmitting device, and the first signal of the host is received. / launcher receives an active sense When the control signal is sent by the card, the first microprocessor compares whether the signal strength of the control signal is greater than or equal to the first signal receiving intensity setting value, and when the control signal strength is greater than or equal to the first signal receiving intensity setting value, A microprocessor executes the control signal. If the control signal strength is less than the first signal reception strength setting value, the first microprocessor does not execute the control signal. The access control system according to claim 1 or 3, wherein the host is connected to a read head, the read head has a third signal receiving/transmitting device, and the third signal receiving/transmitting device has a second receiving sensitivity, and The first microprocessor of the host is further configured with a second signal receiving strength setting value. The access control system of claim 1 or 3, wherein the host is connected to a read head, the read head has a third signal receiving/transmitting device and a third microprocessor, and the third signal receiving/transmitting device has The second receiving sensitivity, the third microprocessor has a second signal receiving intensity setting value. The access control system of claim 1, wherein the host is connected to a read head, the read head has a third signal receiving/transmitting device and a third microprocessor, and the third signal receiving/transmitting device has a second Receiving sensitivity, the third microprocessor has a second signal receiving intensity setting value, so that the third signal receiving/transmitting device of the reading head receives the control signal sent by the active sensing card, and the third microprocessor compares the active signal Whether the signal strength of the control signal sent by the proximity card is greater than the signal strength of the control signal received by the previous read head. If the signal strength of the control signal is greater than the signal strength of the previous control signal, it represents the active proximity card orientation. When the read head moves, the read hair changes the signal to the active proximity card. The access control system of claim 1, wherein the active proximity card is provided with a second microprocessor, the second microprocessor is connected to the second signal receiving/transmitting device, and the second microprocessor The first interval time and the second interval time are set, and the first interval time is longer than the second interval time. For example, in the access control system described in claim 1, wherein the host determines the direction of movement of the active proximity card according to the signal strength of the control signal sent by the active proximity card, The signal strength of the control signal sent by the active proximity card received at the time is compared.