Safety protection monitoring device of rotating arm type centrifugal machine

Abstract

The utility model provides a safety protection monitoring device for a tumbler centrifuge, which comprises a net people counting module used for identifying the number of people entering and exiting a tumbler centrifuge placing room; the human body detection module is used for detecting whether a human body exists in the rotating arm type centrifugal machine placing chamber or not; the master control module is used for outputting a control instruction to the centrifugal machine starting control module according to output data of the human body detection module and the net people counting module, and the centrifugal machine starting control module is used for controlling starting and stopping of a centrifugal machine rotating arm motor; the device is suitable for various tumbler centrifuges used in domestic and overseas constant acceleration test places, and has the characteristics of simple structure, low cost, low energy consumption, strong place applicability, wide application range, high accuracy, strong reliability and the like.

Description

Technical Field

[0001] The utility model relates to the field of safety protection of environmental testing equipment, and particularly discloses a safety protection monitoring device for a rotary arm centrifuge. Background Art

[0002] The constant acceleration test is an indispensable test item for products in the fields of military industry, electronic communication equipment, electric power, digital circuits, satellite navigation, aerospace, industrial instrumentation, ships, industrial control, etc. Whether the test item can be completed in accordance with the nodes with guaranteed quality and quantity depends on whether the equipment used, the rotary arm centrifuge, can operate smoothly. The rotary arm centrifuge is heavy and large in size, and its acceleration can reach 1000m / s² from 10m / s². After it is turned on, the speed is high and the momentum is large, so the operator must be in a safe area (placed outdoors), otherwise, if it collides with a person, it will directly cause "machine destruction and death", and cause unpredictable damage to the test product, so ensuring the safety of people, machines, and materials is the key to this test. Limited by technologies such as human body precision recognition technology, human body speed movement statistics technology, and human body detection technology within a set range, the safety protection measures currently commonly used in China are:

[0003] An access control interlock is installed on the access door of the centrifuge storage room. This interlock controls the power supply to the centrifuge. This allows the equipment to be turned on when the access door is closed, but prevents it from being turned on when the access door is open. While this device provides some protection, it still poses a potential safety hazard: if someone enters the room and then closes the door, the equipment can be turned on. A collision with the person could result in casualties and damage to the equipment and products.

[0004] Therefore, accurately determining whether there is someone in the room where the device is placed and controlling whether the device is turned on or off based on the determination result is a technical problem that urgently needs to be overcome. Summary of the Invention

[0005] The purpose of the utility model is to provide a safety protection monitoring device for a rotary arm centrifuge, which solves the problem of potential safety hazards in the existing safety protection monitoring of the rotary arm centrifuge.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a safety protection monitoring device for a rotary arm centrifuge, comprising:

[0008] Net people counting module, used to identify the number of people entering and leaving the centrifuge room;

[0009] A human body detection module is used to detect whether there is a human body in the rotating arm centrifuge placement room;

[0010] The master control module is used to output control instructions to the centrifuge startup control module according to the output data of the human body detection module and the net number statistics module, and

[0011] The centrifuge startup control module is used to control the start and stop of the centrifuge arm motor.

[0012] Preferably, the master control module includes a single-chip microcomputer of model 87C51FA-20. The P0.3 pin of the single-chip microcomputer is connected to the net number statistics module. The P0.0 pin, P0.1 pin, and P0.2 pin of the single-chip microcomputer are respectively connected to a group of human body detection modules. The P2.7 pin of the single-chip microcomputer is connected to the centrifuge startup control module through a resistor R1.

[0013] Preferably, it further includes a warning display module connected to the master control module.

[0014] Preferably, the P0.5 pin of the single-chip microcomputer of the master control module is connected to the warning display module.

[0015] Preferably, the human body detection module includes an infrared probe. The output port of the infrared probe is divided into five paths. Among them, the first path is grounded through a capacitor C1, the second path is connected to the collector of a triode through a resistor R3, the third path is grounded through a diode D1, the fourth path is connected to the power supply terminal of an amplifier, and the fifth path is connected to the power supply through a resistor;

[0016] The output port of the infrared probe is divided into two paths. The first path is grounded through a resistor, and the second path is divided into two sub-paths through a capacitor C2. Among them, the first sub-path is connected to the positive pole of the amplifier through a resistor R2, a resistor R4, and a capacitor, and the second sub-path is connected to the base of the triode. The emitter of the triode is grounded;

[0017] The third output port of the infrared probe is grounded;

[0018] The negative pole of the amplifier is divided into two paths. One path is grounded through a resistor R5 and a capacitor C4, and the other path is divided into two sub-paths. One of the sub-paths is respectively connected to the output terminal of the amplifier through a resistor R6 and a capacitor C3; the amplifier is also grounded; the output terminal of the amplifier is connected to the master control module.

[0019] Preferably, the model of the infrared probe is SR602.

[0020] Preferably, three human body detection modules are provided, and the three human body detection modules are installed on the walls inside the placement room of the swing-arm centrifuge.

[0021] Preferably, the net number statistics module includes a single-chip microcomputer. The thirty-first pin of the single-chip microcomputer is connected to the power supply, and the nineteenth pin is grounded through a capacitor C1. The eighteenth pin of the single-chip microcomputer is divided into two paths. One path is connected to the capacitor C1 through a crystal oscillator Y1, and the other path is grounded through a capacitor C2. The ninth pin of the single-chip microcomputer is divided into two paths. One path is connected to the power supply through a capacitor C3, and the other path is grounded through a resistor R1. The twenty-first and twenty-second pins of the single-chip microcomputer are connected to a human body induction probe, and the twenty-third pin of the single-chip microcomputer is connected to the master control module.

[0022] Preferably, the model of the single-chip microcomputer is 87C51FA-20.

[0023] Preferably, the net number statistics module is installed at the entrance of the placement room of the swing-arm centrifuge.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] A safety protection device for a swing-arm centrifuge provided by the present utility model identifies the number of people entering and leaving the placement room of the swing-arm centrifuge through a net number statistics module, detects whether there is a human body in the placement room of the swing-arm centrifuge through a human body detection module, and controls the start and stop of the centrifuge swing-arm motor according to the results of the net number statistics module and the human body detection module, solving the problem of potential safety hazards in the safety protection monitoring of existing swing-arm centrifuges. This device is applicable to various swing-arm centrifuges used in constant acceleration test sites at home and abroad, and has the characteristics of simple structure, low cost, low energy consumption, strong site applicability, wide application range, high accuracy, and strong reliability. Description of the Drawings

[0026] Figure 1 is the principle block diagram of the safety protection device for the swing-arm centrifuge in this application;

[0027] Figure 2 is the control principle diagram of the master control module and the start module;

[0028] Figure 3 is the principle diagram of the human body detection module;

[0029] Figure 4 is the principle diagram of the net number statistics module. Detailed Embodiment

[0030] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0031] It should be understood that when used in the specification of this application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0032] It should also be understood that the term "and / or" used in the specification of this application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] As used in the specification of this application and the appended claims, the term "if" may be construed, depending on the context, as "when", "once", "in response to determining", or "in response to detecting". Similarly, the phrases "if determined" or "if [the described condition or event] is detected" may be construed, depending on the context, as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]".

[0034] In addition, in the description of the specification of this application and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0035] Reference to "one embodiment" or "some embodiments" or the like described in the specification of this application means that a specific feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0036] Embodiment 1

[0037] As Figures 1 to 4 shown, a safety protection device for a swing-arm centrifuge provided in this embodiment includes: a master control module, a human body detection module, a net number statistics module, a warning display module, and a centrifuge start control module, where:

[0038] The master control module is configured to output a control instruction to the centrifuge start control module according to the output data of the human body detection module and the net number statistics module.

[0039] The human body detection module is used to detect whether there is a human body in the placement chamber of the swing-arm centrifuge. Its principle is to utilize the characteristic of the human body temperature being 36 - 37 °C, and adopt the E3F-DS30C4 special sensor. When detecting the human body spectrum, it outputs a high level, and when detecting no human body, it outputs a low level; it has the characteristics of high sensitivity and adjustable induction distance.

[0040] The net number of people statistics module is used to identify the number of people entering and leaving the placement chamber of the swing-arm centrifuge. Its principle is through the diffuse switch in two pairs of infrared photoelectric switches. When a human body passes by, the light emitted by the photoelectric emitter is reflected to the receiver to complete data collection, that is, to identify the entry and exit of people. After the signal output by the sensor is processed by the single-chip microcomputer, the state of the relay is controlled according to the collection result. It has the function of adjustable detection distance; bipolar filtering design to effectively eliminate the harmonics generated by interference sources such as motors; infrared light modulation emission and modulation reception.

[0041] The centrifuge start control module is used to receive the command from the main control module and control the relay switch according to the command, thereby controlling the switch of the swing-arm motor of the centrifuge.

[0042] The warning display module is used to receive the command from the main control module and display a red light or a green light according to the command. The red light indicates the existence of danger and the equipment cannot be started; the green light indicates that the danger is lifted and the equipment can be started.

[0043] This device has been successfully applied to the Y53100-1A / ZF type large swing-arm centrifuge produced by Xi'an Jiesheng Electronic Technology Co., Ltd. Install the three human body detection modules of this device on the wall of the placement chamber of the centrifuge, adjust the detection distance so that it just covers the placement chamber, and at the same time adjust the infrared induction spectrum to make it coincide with the spectrum emitted by the human body to achieve blind area-free human body detection in the centrifuge chamber. Install the net number of people statistics module of this device at the entrance of the placement chamber of the swing-arm centrifuge to count the number of people entering and leaving and monitor the net number of people in the dangerous area in real time. Install the equipment start control module in the centrifuge start control circuit to complete the start control of the centrifuge. Finally, connect the three modules to the main control module to achieve the protection purpose that the equipment cannot be started when there is someone in the placement chamber of the centrifuge.

[0044] Embodiment 2

[0045] Based on Embodiment 1, a safety protection device for a swing-arm centrifuge provided in this embodiment, the total control module is a single-chip microcomputer of model 87C51FA-20. The P0.3 pin of the single-chip microcomputer is connected to the net number of people statistics module, the P0.0 pin, P0.1 pin, and P0.2 pin of the single-chip microcomputer are respectively connected to a group of human body detection modules, the P2.7 pin of the single-chip microcomputer is connected to the centrifuge start control module through the resistor R1, and the P0.5 pin of the single-chip microcomputer is connected to the warning display module.

[0046] Example 3

[0047] Based on Example 1, a safety protection device for a swing-arm centrifuge provided in this example

[0048] The human body detection module includes an infrared probe of model SR602. The output port of the infrared probe is divided into five paths. Among them, the first path is grounded through capacitor C1, the second path is connected to the collector of the triode through resistor R3, the third path is grounded through diode D1, the fourth path is connected to the power supply terminal of amplifier LM324, and the fifth path is connected to the power supply through a resistor.

[0049] The output port of the infrared probe is divided into two paths. The first path is grounded through a resistor, and the second path is divided into two sub-paths through capacitor C2. Among them, the first sub-path is connected to the positive pole of amplifier LM324 through resistor R2, resistor R4, and a capacitor, and the second sub-path is connected to the base of the triode. The emitter of the triode is grounded.

[0050] The output port three of the infrared probe is grounded.

[0051] The negative pole of amplifier LM324 is divided into two paths. One path is grounded through resistor R5 and capacitor C4, and the other path is divided into two sub-paths. One sub-path is respectively connected to the output terminal of amplifier LM324 through resistor R6 and capacitor C3; amplifier LM324 is also grounded; the output terminal of amplifier LM324 is connected to the total control module.

[0052] Example 4

[0053] Based on Example 1, a safety protection device for a swing-arm centrifuge provided in this example. The net number statistics module includes a single-chip microcomputer of model 87C51FA-20. The thirty-first pin of the single-chip microcomputer is connected to the power supply, and the nineteenth pin is grounded through capacitor C1. The eighteenth pin of the single-chip microcomputer is divided into two paths. One path is connected to capacitor C1 through crystal oscillator Y1, and the other path is grounded through capacitor C2; the ninth pin of the single-chip microcomputer is divided into two paths. One path is connected to the power supply through capacitor C3, and the other path is grounded through resistor R1; the twenty-first pin and the twenty-second pin of the single-chip microcomputer are connected to the human body induction probe, and the twenty-third pin of the single-chip microcomputer is connected to the total control module.

[0054] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A safety protection and monitoring device for a swing-arm centrifuge, characterized in that, It includes: A net number statistics module for identifying the number of people entering and leaving the placement room of the swing-arm centrifuge; A human body detection module for detecting whether there is a human body in the placement room of the swing-arm centrifuge; A master control module for outputting a control instruction to the centrifuge start control module according to the output data of the human body detection module and the net number statistics module, and A centrifuge start control module for controlling the start and stop of the centrifuge swing-arm motor.

2. The safety protection monitoring device of a swing-arm centrifuge according to claim 1, characterized in that, The master control module includes a single-chip microcomputer of model 87C51FA-20. The P0.3 pin of the single-chip microcomputer is connected to the net number statistics module. The P0.0 pin, P0.1 pin, and P0.2 pin of the single-chip microcomputer are respectively connected to a group of human body detection modules. The P2.7 pin of the single-chip microcomputer is connected to the centrifuge start control module through a resistor R1.

3. The safety protection monitoring device of a swing-arm centrifuge according to claim 2, characterized in that It also includes a warning display module connected to the master control module.

4. A safety protection monitoring device for a swing arm centrifuge according to claim 3, characterized in that The P0.5 pin of the single-chip microcomputer of the master control module is connected to the warning display module.

5. The safety protection and monitoring device of a swing-arm centrifuge according to claim 1, wherein, The human body detection module includes an infrared probe. The output port of the infrared probe is divided into five paths. Among them, the first path is grounded through a capacitor C1, the second path is connected to the collector of a triode through a resistor R3, the third path is grounded through a diode D1, the fourth path is connected to the power supply terminal of an amplifier, and the fifth path is connected to the power supply through a resistor; The output port of the infrared probe is divided into two paths. The first path is grounded through a resistor, and the second path is divided into two sub-paths through a capacitor C2. Among them, the first sub-path is connected to the positive pole of the amplifier through a resistor R2, a resistor R4, and a capacitor, and the second sub-path is connected to the base of the triode. The emitter of the triode is grounded; The third output port of the infrared probe is grounded; The negative pole of the amplifier is divided into two paths. One path is grounded through a resistor R5 and a capacitor C4, and the other path is divided into two sub-paths. Each of the two sub-paths is connected to the output terminal of the amplifier through a resistor R6 and a capacitor C3; the amplifier is also grounded; the output terminal of the amplifier is connected to the master control module.

6. The safety protection monitoring device of a swing-arm centrifuge according to claim 5, characterized in that, The model of the infrared probe is SR602.

7. A safety protection and monitoring device for a swing-arm centrifuge according to claim 1, wherein, There are three human body detection modules, and the three human body detection modules are installed on the wall in the placement room of the swing-arm centrifuge.

8. A safety protection monitoring device for a swing-arm centrifuge according to claim 1, characterized in that, The net number statistics module includes a single-chip microcomputer. The thirty-first pin of the single-chip microcomputer is connected to the power supply, and the nineteenth pin is grounded through a capacitor C1. The eighteenth pin of the single-chip microcomputer is divided into two paths. One path is connected to a capacitor C1 through a crystal oscillator Y1, and the other path is grounded through a capacitor C2; the ninth pin of the single-chip microcomputer is divided into two paths. One path is connected to the power supply through a capacitor C3, and the other path is grounded through a resistor R1; the twenty-first pin and the twenty-second pin of the single-chip microcomputer are connected to a human body induction probe, and the twenty-third pin of the single-chip microcomputer is connected to the master control module.

9. The safety protection monitoring device of a swing-arm centrifuge according to claim 8, characterized in that The model of the single-chip microcomputer is 87C51FA-20.

10. A safety protection monitoring device for a swing-arm centrifuge according to claim 1, characterized in that The net number statistics module is installed at the entrance of the placement room of the swing-arm centrifuge.

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