Monitoring terminal on-line state detection device

Abstract

The invention relates to an on-line state detection device for a monitoring terminal, and the device comprises an LED array panel which comprises a mounting plate and a plurality of LED lamps disposed on the mounting plate; a plurality of detection units, each detection unit being in one-to-one correspondence with each LED lamp, each detection unit comprising: an HDMI adapter comprising a male head, a female head, a cable connecting the male head and the female head, and a detection line having one end connected to a power pin of the female head; the positive-phase input end of the comparator is connected to the other end of the detection line, the negative-phase input end and the negative electrode of the power supply are grounded, and the positive electrode of the power supply is connected to the positive electrode of the first direct-current power supply; one end of a coil of the relay is connected to the output end of the comparator, the other end of the coil of the relay is grounded through the first current-limiting resistor, a common contact of the relay is connected to the positive electrode of the second direct-current power supply, and a normally open contact of the relay is connected to the positive electrode of the corresponding LED lamp. Compared with the prior art, on-line conditions of all monitoring terminals can be observed on a concentrated LED array panel, and on the other hand, interference on monitoring pictures can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of monitoring terminal detection, and in particular to a monitoring terminal online status detection device. Background Art

[0002] At present, most communities have monitoring systems and monitoring rooms. Based on the monitoring system, it is possible to collect all-round video image information of various targets such as "people", "vehicles" and "objects" in the community and apply it to all types of police forces.

[0003] In the existing technology, images collected by each monitoring terminal of the monitoring system are sent to the monitoring room for unified display. However, since the monitoring terminals are often installed in various places, they may be damaged. When damaged, it is usually discovered by the on-duty personnel in the monitoring room, who will notify the maintenance personnel to go and check.

[0004] Therefore, when the on-duty personnel are not in the monitoring room, or are not facing the screen, they cannot respond quickly, or other workstations in the monitoring room cannot quickly and automatically obtain whether all monitoring terminals are online. Summary of the Invention

[0005] The purpose of the present invention is to provide a monitoring terminal online status detection device. By designing a detection line to detect the power signal of the HDMI interface, and based on a comparator, the signal is compared with the zero potential and amplified, and used to drive a relay to control the on or off of the LED light. On the one hand, the online status of all monitoring terminals can be observed on a centralized LED array panel, and on the other hand, the interference with the monitoring screen can be reduced.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A monitoring terminal online status detection device, comprising:

[0008] The LED array panel includes a mounting plate and a plurality of LED lamps arranged on the mounting plate;

[0009] Multiple detection units, each detection unit corresponds to each LED lamp one by one, wherein a single detection unit includes:

[0010] An HDMI adapter, including a male connector, a female connector, a cable connecting the male and female connectors, and a test cable with one end connected to the power pin of the female connector;

[0011] a comparator, wherein the non-inverting input terminal is connected to the other end of the detection line, the inverting input terminal and the negative electrode of the power supply are grounded, and the positive electrode of the power supply is connected to the positive electrode of the first DC power supply;

[0012] A relay and a first current-limiting resistor, one end of the coil of the relay is connected to the output end of the comparator, and the other end is grounded through the first current-limiting resistor, the common contact of the relay is connected to the positive pole of the second DC power supply, and the normally open contact is connected to the positive pole of the corresponding LED lamp.

[0013] The second DC power supply is fixed on the mounting plate.

[0014] The cathode of the LED lamp is grounded via a second current-limiting resistor.

[0015] The second current limiting resistor is fixed on the mounting board.

[0016] A third current-limiting resistor is provided between the coil of the relay and the output end of the comparator.

[0017] The detection line is wrapped with an insulating layer.

[0018] The mounting plate is provided with a plurality of label pasting positions, each label pasting position corresponds to each LED lamp one by one, and each label pasting position is located next to the corresponding LED lamp.

[0019] The included angle between the male and female ends of the HDMI adapter is 90 degrees.

[0020] The male end of the HDMI adapter is connected to the monitoring terminal, and the female end is connected to the monitoring center via an HDMI cable.

[0021] The LED lamp is a green LED lamp.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. By designing a detection line to detect the power signal of the HDMI interface, and based on the comparator, the signal is compared with the zero potential and amplified to drive the relay to control the on or off of the LED light. On the one hand, the online status of all monitoring terminals can be observed on a centralized LED array panel, and on the other hand, the interference to the monitoring screen can be reduced.

[0024] 2. By designing the third current-limiting resistor, a single failure-proof resistor can be formed with the first current-limiting resistor, thereby improving stability.

[0025] 3. The label pasting position makes it easy to paste labels, so as to intuitively obtain the corresponding relationship between each LED light and the monitoring terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 is a schematic diagram of the front side of the LED array panel;

[0028] Figure 3 This is a schematic diagram of the external shape of the HDMI adapter;

[0029] Among them: 1. Mounting plate, 2. Label attachment area, 3. Male connector, 4. Female connector, 5. Detection line, U1, comparator, R1, first current-limiting resistor, R2, second current-limiting resistor, R3, third current-limiting resistor, K1, relay, VCC, first DC power supply, VDD, second DC power supply, L1, LED light. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0032] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0033] A monitoring terminal online status detection device, such as Figure 1 Shown, including:

[0034] The LED array panel includes a mounting plate 1 and a plurality of LED lamps L1 arranged on the mounting plate 1;

[0035] Multiple detection units, each detection unit corresponds to each LED lamp L1, wherein a single detection unit includes:

[0036] An HDMI adapter, including a male connector 3, a female connector 4, a cable connecting the male connector 3 and the female connector 4, and a detection line 5 with one end connected to the power pin of the female connector 4;

[0037] The comparator U1 has a non-inverting input connected to the other end of the detection line 5, an inverting input and the negative electrode of the power supply are grounded, and the positive electrode of the power supply is connected to the positive electrode of the first DC power supply VCC;

[0038] Relay K1 and the first current limiting resistor R1, one end of the coil of relay K1 is connected to the output end of the comparator U1, and the other end is grounded through the first current limiting resistor R1, the common contact of relay K1 is connected to the positive pole of the second DC power supply VDD, and the normally open contact is connected to the positive pole of the corresponding LED lamp L1.

[0039] By designing the detection line 5 to detect the power signal of the HDMI interface, and based on the comparator U1, the signal is compared with the zero potential and amplified to drive the relay K1 to control the on or off of the LED lamp L1. On the one hand, the online status of all monitoring terminals can be observed on a centralized LED array panel, and on the other hand, the interference to the monitoring screen can be reduced.

[0040] Specifically, the HDMI interface has a total of 19 pins, among which pin numbered 18 is the power pin. The detection line 5 is connected to the power pin. At this time, when the signal of the HDMI interface is normal, the input of the detection line 5 will be a high level, greater than 0. At this time, the comparator output is a high level, and the specific output is the voltage value of the first DC power supply VCC. Conversely, when the signal of the HDMI interface disappears, the input of the detection line 5 will be a low level, so that the comparator output is 0. When the comparator output is a high level, the relay will be energized, and the corresponding LED light L1 will light up. Otherwise, the relay will not be energized, and the LED light L1 will go out.

[0041] Furthermore, in some embodiments, the inverting input of the comparator may also be connected to a voltage slightly greater than 0, such as 0.01V.

[0042] In some embodiments, as Figure 3 As shown, the included angle between the male connector 3 and the female connector 4 of the HDMI adapter is 90 degrees. The male connector 3 of the HDMI adapter is connected to the monitoring terminal, and the female connector 4 is connected to the monitoring center via an HDMI cable.

[0043] Generally, in most embodiments, the second DC power supply VDD is fixed on the mounting board 1 . Similarly, the second current limiting resistor R2 is fixed on the mounting board 1 and can be disposed on the back side of the mounting board 1 .

[0044] In some embodiments, the LED lamp L1 is a green LED lamp L1. Of course, in other embodiments, other colors, such as white light, may also be used.

[0045] In addition, in some embodiments, the cathode of the LED lamp L1 is grounded via the second current limiting resistor R2, so that the LED lamp L1 can be protected.

[0046] A third current limiting resistor R3 is provided between the coil of the relay K1 and the output terminal of the comparator U1. By designing the third current limiting resistor R3, a single failure-proof resistor can be formed together with the first current limiting resistor R1, thereby improving stability.

[0047] Generally, the detection line 5 is wrapped with an insulating layer.

[0048] The mounting plate 1 is provided with a plurality of label pasting positions 2, each label pasting position 2 corresponds to each LED lamp L1 one by one, and each label pasting position 2 is located next to the corresponding LED lamp L1. The label pasting position can facilitate pasting labels, so that the corresponding relationship between each LED lamp and the monitoring terminal can be intuitively obtained.

Claims

1. A monitoring terminal online status detection device, characterized in that: include: The LED array panel includes a mounting plate and a plurality of LED lamps arranged on the mounting plate; Multiple detection units, each detection unit corresponds to each LED lamp one by one, wherein a single detection unit includes: An HDMI adapter, including a male connector, a female connector, a cable connecting the male and female connectors, and a test cable with one end connected to the power pin of the female connector; a comparator, wherein the non-inverting input terminal is connected to the other end of the detection line, the inverting input terminal and the negative electrode of the power supply are grounded, and the positive electrode of the power supply is connected to the positive electrode of the first DC power supply; A relay and a first current-limiting resistor, one end of the coil of the relay is connected to the output end of the comparator, and the other end is grounded through the first current-limiting resistor, the common contact of the relay is connected to the positive pole of the second DC power supply, and the normally open contact is connected to the positive pole of the corresponding LED lamp.

2. A monitoring terminal online status detection device according to claim 1, characterized in that: The second DC power supply is fixed on the mounting plate.

3. The monitoring terminal online status detection device according to claim 1, characterized in that: The cathode of the LED lamp is grounded via a second current-limiting resistor.

4. The monitoring terminal online status detection device according to claim 3, characterized in that: The second current limiting resistor is fixed on the mounting board.

5. The monitoring terminal online status detection device according to claim 1, characterized in that: A third current-limiting resistor is provided between the coil of the relay and the output end of the comparator.

6. The monitoring terminal online status detection device according to claim 1, characterized in that: The detection line is wrapped with an insulating layer.

7. The monitoring terminal online status detection device according to claim 1, characterized in that: The mounting plate is provided with a plurality of label pasting positions, each label pasting position corresponds to each LED lamp one by one, and each label pasting position is located next to the corresponding LED lamp.

8. The monitoring terminal online status detection device according to claim 1, characterized in that: The included angle between the male and female ends of the HDMI adapter is 90 degrees.

9. The monitoring terminal online status detection device according to claim 1, characterized in that: The male end of the HDMI adapter is connected to the monitoring terminal, and the female end is connected to the monitoring center via an HDMI cable.

10. The monitoring terminal online status detection device according to claim 1, characterized in that: The LED lamp is a green LED lamp.

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