WO2020051736A1

WO2020051736A1 - Alarm circuit and device for detecting removal of apparatus

Info

Publication number: WO2020051736A1
Application number: PCT/CN2018/104833
Authority: WO
Inventors: 李文祥; 袁耕
Original assignee: 深圳市锐明技术股份有限公司
Priority date: 2018-09-10
Filing date: 2018-09-10
Publication date: 2020-03-19
Also published as: CN109416862A

Abstract

An alarm circuit and device for detecting the removal of an apparatus. The apparatus is fixed at a preset position. It is determined by means of detection whether the apparatus has been removed from the preset position, and a detection signal is output. After the detection signal is processed and determined, a control signal is output. Finally, an alarm signal is output according to the control signal. In this way, the invention performs real-time detection of whether an apparatus has been removed. The alarm circuit has a simple design and a wide application range. In addition, a power supply unit (104) is configured to supply power for the alarm circuit, such that detection can be performed even if the apparatus is turned off or has lost power, thereby avoiding detection failure, and thus effective and instant detection of apparatus removal can be performed regardless of whether the apparatus is operating or not. The invention solves the issue of existing apparatus removal alarms in which detection cannot be performed when the apparatus is turned off or has lost power, limiting an applicable range of an apparatus removal alarm function, or in which a detection function fails when a power supply is abnormal, resulting in low reliability.

Description

Alarm circuit and device for equipment removal

Technical field

This solution belongs to the technical field of electronic circuits, and particularly relates to an alarm circuit and a device for removing equipment.

Background technique

At present, many industries need to install electronic supervision equipment for reasons of safety management. Due to the special nature of these devices, unauthorized removal or replacement is not allowed. Therefore, it is necessary to set up a reliable equipment to remove the alarm system.

The most common existing method is to use an active detection switch unit, such as a mechanical switch, a photoelectric switch, etc., through a special structural design, to achieve an alarm function when the device is removed and the active detection switch is triggered. However, this method has the problem that it cannot be detected when the device is turned off or powered off, which limits the usable range of the removal alarm function; and when the power supply is abnormal, this solution has the risk of failure and low reliability.

Therefore, the existing alarm technology for device removal has the problem that it cannot be detected when the device is turned off or powered down, which limits the usable range of the removal alarm function; and when the power is abnormal, the detection function fails, resulting in low reliability .

technical problem

The purpose of this solution is to provide an alarm circuit and device for device removal, which aims to solve the existing alarm technology for device removal. The device cannot be detected when the device is turned off or powered off, which limits the function of removing the alarm. And the detection function fails when the power supply is abnormal, leading to a problem of low reliability.

Technical solutions

The first aspect of the solution provides an alarm circuit for removing equipment, the device is fixed at a preset position, and the alarm circuit includes:

A detection unit connected to the device for detecting whether the device is removed from the preset position and outputting a detection signal;

A signal processing unit connected to the detection unit and configured to receive the detection signal, process and determine the detection signal, and output a control signal;

A power supply unit connected to the signal processing unit for supplying power to the signal processing unit; and

An alarm unit connected to the signal processing unit and configured to output an alarm signal according to the control signal.

The second aspect of the present invention provides an alarm device for removing equipment, including the device and an alarm circuit, the device is fixed at a preset position, and the alarm circuit includes:

Beneficial effect

This solution provides an alarm circuit and device for equipment removal. The equipment is fixed at a preset position. By detecting whether the equipment is removed at a preset position and outputting a detection signal, the detection signal is processed and After the judgment, a control signal is output; finally, an alarm signal is output according to the control signal; thus the effect of real-time detection of the removal of the device is achieved. The alarm circuit has a simple design and a wide range of applications. At the same time, a power unit is set to supply the alarm circuit. It can also detect when the device is turned off or powered off, avoiding the problem of detection failure. Whether the device is working or not, effective detection can be performed as long as the dismantling behavior occurs, and the existing alarm technology for device removal exists. When the device is turned off or powered off, it cannot be detected, which limits the usable range of the removal alarm function; and when the power supply is abnormal, the detection function fails, causing a problem of low reliability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a unit for an alarm circuit for device removal provided by an embodiment of the present solution.

FIG. 2 is an example circuit diagram of an alarm circuit for device removal provided by an embodiment of the present solution.

FIG. 3 is a schematic diagram of a specific circuit structure of a signal processing unit in an alarm circuit for device removal provided by an embodiment of the present solution.

Embodiments of the invention

In order to make the technical problems, technical solutions, and beneficial effects of the solution more clear, the following further describes the solution in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the solution, and are not used to limit the solution.

The above-mentioned alarm circuit and device for equipment removal. The equipment is fixed at a preset position. By detecting whether the equipment is removed at a preset position and outputting a detection signal, the detection signal is processed and judged. , Output control signal; finally output alarm signal according to the control signal; thus realizing the effect of real-time detection of equipment removal, the alarm circuit has a simple design and a wide range of applications; at the same time, a power supply unit is provided to supply power to the alarm circuit, so that when It can also be detected when the device is turned off or powered off, avoiding the problem of detection failure. Whether the device is working or not, effective detection can be performed as long as the dismantling behavior occurs. Among them, the device is a device that is installed on a supervised device or personnel with monitoring and management functions in accordance with the requirements of laws and regulations; removal of an alarm refers to detecting whether the above device is installed at a specified location, and if the device leaves the specified installation location, it triggers some The alarm signal reminds the related equipment or personnel.

In order to enable those skilled in the art to better understand the technical solution of this solution, the following further describes this solution in detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 shows a unit structure of an alarm circuit for device removal provided by an embodiment of the present solution. For convenience of explanation, only the parts related to this embodiment are shown, and the details are as follows:

The above-mentioned alarm circuit for removing equipment, the device is fixed at a preset position, and the alarm circuit includes a detection unit 101, a signal processing unit 102, a power supply unit 104, and an alarm unit 103.

The detection unit 101 is connected to the device, and is configured to detect whether the device is removed at a preset position and output a detection signal.

The signal processing unit 102 is connected to the detection unit 101 and is configured to receive a detection signal, process and determine the detection signal, and output a control signal.

The power supply unit 104 is connected to the signal processing unit 102 and is configured to supply power to the signal processing unit 102.

The alarm unit 103 is connected to the signal processing unit 102 and configured to output an alarm signal according to the control signal.

As an embodiment of this solution, the above device is a device that is installed on a supervised device or a person and has a monitoring and management function according to the requirements of laws and regulations. The removal and alarm function of the above alarm circuit refers to detecting whether the above device is installed at a specified location. If the equipment leaves the designated installation location, an alarm signal is triggered to alert the relevant equipment or personnel.

Specifically, when the detection unit 101 detects that the device is not removed at the preset position, the detection signal output is a low-level signal; when the detection unit 101 detects that the device is removed at the preset position, the detection signal is output Is a high-level signal.

Then, when the signal processing module 102 processes the detection signal and judges it to be a high-level signal, it is determined that the device has been removed from the preset position and outputs a control signal to control the alarm unit 103 to perform an alarm.

In addition, the alarm circuit is powered by the above-mentioned power supply unit 104 alone. Even when the device is turned off or powered off, the alarm circuit operates as usual, that is, whether the device is working or not, effective detection can be performed as long as the dismantling behavior occurs.

FIG. 2 shows an example circuit of an alarm circuit for device removal provided by an embodiment of the present solution. For convenience of explanation, only a part related to this embodiment is shown, and the details are as follows:

As an embodiment of the present solution, the detection unit 101 includes any one of an on-off switch, a sensor, and an electrical cable. FIG. 2 uses an on-off switch S1 to indicate that the first end and the second end of the on-off switch S1 are connected to signals. Processing unit 102. The on and off states of the on-off switch S1 can be triggered manually or by a sensor. Once the device is removed or moved, the on-off switch S1 will be triggered to open, and the detection unit 101 will detect that the device is removed or moved. Of course, if the detection unit 101 is an electrical cable, its principle is similar to the on-off switch S1. When the device is removed, the electrical cable cannot form a loop, which is an open state. The detection unit is simple to implement, low in cost, and convenient to install.

As an embodiment of the present solution, the signal processing unit 102 may be implemented by a single-chip microcomputer, and includes a backup register. The database of the backup register has original data. The backup register is used to receive the detection signal, and the original data changes. Specifically, when the detection signal changes (from a low-level signal to a high-level signal), the data in the backup register will be lost, that is, the original data will change. The backup register is a memory powered by the DC power supply B1, and can be replaced by other devices with a memory function.

As an embodiment of the solution, the power supply unit 104 includes a DC power source B1 having a preset voltage value, and the preset voltage value is 5V or 12V. Of course, the preset voltage value can also be set according to actual needs.

As an embodiment of the present solution, the alarm unit 103 includes a buzzer or a horn. Of course, the alarm unit 103 may also be uploaded to the server through a wired transmission or wireless communication to notify the staff and have the effect of alarming.

FIG. 3 shows a specific circuit structure of a signal processing unit in an alarm circuit for device removal provided by an embodiment of the present solution. For convenience of explanation, only parts related to this embodiment are shown, and the details are as follows:

As an embodiment of the present solution, in the signal processing unit 102, the signal input terminal X1 and the signal input terminal X2 turn on the first end and the second end of the switch S1, respectively. Among them, the signal input terminal X2 is grounded with the negative electrode of the DC power source B1. The signal input terminal X1 is connected to the backup register through line 2. The DC power source B1 supplies power to the backup register through line 1. At the same time, it is connected to line 2 through resistor R1. When the on-off switch S1 is turned on, the signal at the signal input terminal X1 is at a low level; when the on-off switch S1 is turned off, the signal at the signal input terminal X1 is at a high level. The high and low level signals enter the backup register, the data in the backup register changes, and the data in the backup register is transmitted to the superior computer system via line 3. The computer system judges whether an alarm signal is required based on the difference between the register data and the original data.

This alarm circuit uses DC power supply B1 (that is, backup battery) for power supply, which can continuously monitor whether there is an alarm message when the device has no external power supply. The alarm circuit judges the difference between the data in the backup register and the original data to identify whether there is an alarm message. Since the data in the backup register cannot be restored in the reverse direction, the data in the backup register can be read multiple times to avoid transmission of the alarm message due to transmission. Information loss due to failure or human causes.

This solution also provides an alarm device for equipment removal, including the device and an alarm circuit, the device is fixed at a preset position, and the alarm circuit is as described above.

The following describes the working principle of the above-mentioned alarm circuit and device for removing equipment with reference to FIGS. 1-3:

First, the device is fixed at a preset position, and the detection unit 101 is connected to the device.

Normally, the on-off switch S1 is in a closed state, and the signal input terminal X1 and the signal input terminal X2 of the signal processing unit 102 are in an on state.

When the device is removed, the on-off switch S1 is in an off state, or the connection between the on-off switch S1 and the signal processing unit 102 is disconnected. At this time, the signal input terminal X1 and the signal input terminal X2 of the signal processing unit 102 are in an off state. . Because the signals of the signal input terminal X1 and the signal input terminal X2 change, the data of the backup register is lost, so the signal processing unit 102 detects that the device is removed, and then controls the alarm unit 103 to perform an alarm.

At the same time, the DC power supply B1 (that is, the backup battery) is used to power the alarm circuit, which minimizes the impact of the external environment on the reliability of the alarm circuit; so that it can be detected when the device is turned off or powered off, avoiding the problem of detection failure No matter whether the equipment is working or not, effective detection can be performed as long as the dismantling behavior occurs.

In summary, an alarm circuit and device for device removal provided in the embodiment of this solution are provided. The device is fixed at a preset position, and detects whether the device is removed at the preset position and outputs a detection signal. After the detection signal is processed and judged, a control signal is output; finally, an alarm signal is output according to the control signal; thereby achieving the effect of real-time detection of equipment removal, the alarm circuit has a simple design and a wide range of applications; and a power unit The alarm circuit supplies power so that it can be detected when the equipment is turned off or powered off, avoiding the problem of detection failure. Whether the equipment is working or not, it can be effectively detected as long as the dismantling behavior occurs, which solves the existing equipment removal The existing alarm technology has the problem that it cannot be detected when the device is turned off or powered off, which limits the usable range of the dismantling alarm function; and when the power supply is abnormal, the detection function fails, resulting in low reliability.

Specific examples are used in this article to explain the principle and implementation of this solution. The description of the above embodiments is only used to help understand the method of this solution and its core ideas. It should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the solution, several improvements and modifications can be made to the solution, and these improvements and modifications also fall within the protection scope of the claims of the solution.

The above are only the preferred embodiments of the solution, and are not intended to limit the solution. Any modification, equivalent replacement, and improvement made within the spirit and principles of the solution shall be included in the protection of the solution. Within range.

Claims

An alarm circuit for removing equipment, the device is fixed at a preset position, and is characterized in that the alarm circuit includes:

A detection unit connected to the device for detecting whether the device is removed from the preset position and outputting a detection signal;

A signal processing unit connected to the detection unit and configured to receive the detection signal, process and determine the detection signal, and output a control signal;

A power supply unit connected to the signal processing unit for supplying power to the signal processing unit; and

An alarm unit connected to the signal processing unit and configured to output an alarm signal according to the control signal.
The alarm circuit according to claim 1, wherein the detection unit comprises any one of an on-off switch, a sensor, and an electrical cable.
The alarm circuit according to claim 1, wherein the signal processing unit includes a backup register;

The database of the backup register has original data, and the backup register is used to change the original data after receiving the detection signal.
The alarm circuit according to claim 1, wherein the power supply unit comprises a DC power supply having a preset voltage value, and the preset voltage value is 5V or 12V.
The alarm circuit according to claim 1, wherein the alarm unit comprises a buzzer or a horn.
An alarm device for equipment removal includes a device and an alarm circuit, the device is fixed at a preset position, and is characterized in that the alarm circuit includes:

A detection unit connected to the device for detecting whether the device is removed from the preset position and outputting a detection signal;

A signal processing unit connected to the detection unit and configured to receive the detection signal, process and determine the detection signal, and output a control signal;

A power supply unit connected to the signal processing unit for supplying power to the signal processing unit; and

An alarm unit connected to the signal processing unit and configured to output an alarm signal according to the control signal.
The alarm device according to claim 6, wherein the detection unit comprises any one of an on-off switch, a sensor, and an electric cable.
The alarm device according to claim 6, wherein the signal processing unit includes a backup register;

The database of the backup register has original data, and the backup register is used to change the original data after receiving the detection signal.
The alarm device according to claim 6, wherein the power supply unit comprises a DC power supply having a preset voltage value, and the preset voltage value is 5V or 12V.
The alarm device according to claim 6, wherein the alarm unit includes a buzzer or a horn.