Calibration device of alarm circuit board

Abstract

The utility model relates to a calibration device of an alarm circuit board. Comprising a calibration box body with a box cover capable of being opened and closed, a calibration box panel is installed on the front portion of the calibration box body, a display instrument and an operation panel are arranged on the calibration box panel, a plurality of calibration trays are arranged in the calibration box body, and a plurality of alarm circuit boards are loaded on the calibration trays; the calibration tray comprises a tray rack, a plurality of golden finger socket boards are mounted on the tray rack, a plurality of groups of golden finger sockets are mounted on the golden finger socket boards, a power supply interface, a signal transmission interface and an interface board are further arranged on the tray rack, and each group of golden finger sockets is connected with the interface board through the corresponding golden finger socket board. The power supply interface and the signal transmission interface are connected with the interface board; the calibration box body is also provided with a standard gas interface and a gas analyzer interface, the standard gas interface is connected to standard gas through a pipeline, and the gas analyzer interface is connected to a gas analyzer through a pipeline. The utility model provides a calibration device of an alarm circuit board, which has a large-scale calibration function and improves the convenience of calibration operation and the efficiency of calibration operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of alarm production equipment, and particularly relates to a calibration device for an alarm circuit board. Background Art

[0002] The alarm circuit board is a circuit board applied to a household combustible gas alarm / detector. Before assembling the alarm circuit board into the main body of the alarm after production, a calibration operation needs to be carried out. According to the calibration process, the alarm circuit board is placed into a calibration device, and a kind of gas to be detected required by the calibration process is injected into the calibration box until the concentration in the box shown by the gas detector is stable at the first concentration requirement, and for a certain period of time, the alarm circuit board product should be in a normal monitoring state; continue to inject gas into the calibration box until the concentration shown by the gas detector is stable at the second concentration requirement, and for a certain period of time, the product should enter the alarm state within 30 seconds. The product passing through the foregoing calibration process is regarded as qualified, otherwise it is judged as unqualified, and the qualified product stores the calibrated alarm set value.

[0003] As can be seen from the foregoing, the calibration operation of the alarm circuit board is a relatively complex process. With the expansion of the production scale of alarm products, the original small-scale calibration device has been difficult to meet the production requirements, and it is necessary to develop and design a calibration device that supports large-scale product calibration to assist the production activities of large-scale alarm products. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a calibration device for an alarm circuit board, which has the function of large-scale calibration, and improves the convenience and efficiency of the calibration operation.

[0005] The technical solution adopted by the utility model is: a calibration device for an alarm circuit board, including a calibration box body with a switchable box cover, a calibration box panel is installed at the front of the calibration box body, and a display instrument and an operation panel are arranged on the calibration box panel. Inside the calibration box body, there are multiple calibration trays, and multiple alarm circuit boards are loaded on the calibration trays; the calibration tray includes a tray rack, multiple gold finger socket boards are installed on the tray rack, and multiple groups of gold finger sockets are installed on the gold finger socket boards. A power supply interface, a signal transmission interface and an interface board are also arranged on the tray rack. Each group of gold finger sockets is connected to the interface board through the gold finger socket board where it is located, and the power supply interface and the signal transmission interface are connected to the interface board; a calibration gas interface and a gas analyzer interface are also arranged on the calibration box body. The calibration gas interface is connected to the calibration gas through a pipeline, and the gas analyzer interface is connected to the gas analyzer through a pipeline.

[0006] Preferably, the gold finger socket board is a strip board, and its groups of gold finger sockets are arranged along the length direction. Each gold finger socket board is arranged in parallel, and ventilation holes are arranged between adjacent gold finger socket boards on the tray rack.

[0007] Preferably, the power supply interface and signal transmission interface of each calibration tray are connected to the display instrument and operation panel through a wiring harness located inside the box.

[0008] Preferably, the pallet rack is also provided with a handle for moving the calibration pallet.

[0009] Preferably, a stirring fan is also provided inside the calibration chamber, and the stirring fan is connected to the display instrument and the operation panel.

[0010] The advantages and positive effects of this utility model are:

[0011] This invention provides a calibration device for alarm circuit boards. Compared with existing calibration devices, the calibration device of this invention has multiple insertable and removable calibration trays inside the calibration box, and multiple alarm circuit boards to be calibrated are loaded on each calibration tray. Therefore, each calibration operation can simultaneously complete the large-scale calibration of multiple alarm circuit boards, improving the efficiency of product calibration. Moreover, the standardized calibration trays for loading alarm circuit boards improve the convenience of large-scale transfer of alarm circuit boards. For example, the calibration trays and alarm circuit boards can be transferred as a whole between the aging process and the calibration process, which is convenient.

[0012] By installing multiple gold finger socket boards, each with multiple sets of gold finger connectors, on the calibration tray, alarm circuit boards with gold fingers can be easily and quickly connected to the gold finger sockets, including power and signal connections. By providing the calibration tray with an interface board featuring both power and signal transmission interfaces, unified management and connection of each gold finger socket board and its respective gold finger connector sets are achieved. The inclusion of a calibration gas interface and a gas analyzer interface on the calibration box enhances the convenience of gas path connections. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 A schematic diagram of the connection structure between the calibration tray and the alarm circuit board;

[0015] Figure 3 yes Figure 1 A schematic diagram of the connection structure between the calibration tray and the alarm circuit board;

[0016] Figure 4 yes Figure 3 Circuit diagram of the interface board;

[0017] Figure 5 yes Figure 3Circuit diagram of the Zhongjin Finger socket board.

[0018] In the picture:

[0019] 1. Calibration box; 2. Calibration box panel; 3. Display instrument and operation panel; 4. Calibration tray; 4-1. Tray frame; 4-2. Interface board; 4-3. Power supply interface; 4-4. Signal transmission interface; 4-5. Gold finger socket board; 4-6. Gold finger socket; 4-7. Handle; 4-8. Vent hole; 5. Alarm circuit board; 6. Calibration gas interface; 7. Gas analyzer interface; 8. Host computer; 9. Gas analyzer; 10. Calibration gas. Detailed Implementation

[0020] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0021] The principle of calibrating the alarm circuit board 5 is as follows: the product is placed in a sealed box, which is defined as the calibration box. Calibration gas 10 is injected into the calibration box. When the gas concentration reaches the alarm set value, a command is sent to the alarm circuit board 5. After receiving the command, the product stores this value (i.e. the aforementioned alarm set value) in the product. This process is called calibration.

[0022] Please see Figure 1 The calibration device for the alarm circuit board of this utility model includes a calibration box 1 with a slewable cover, a calibration box panel 2 installed on the front of the calibration box 1, and a display instrument and an operation panel 3 provided on the calibration box panel 2.

[0023] The calibration chamber 1 is also equipped with a standard gas interface 6 and a gas analyzer interface 7. The standard gas interface 6 is connected to the standard gas 10 via a pipeline, and the gas analyzer interface 7 is connected to the gas analyzer 9 via a pipeline. The standard gas 10 refers to a standard gas, which is supplied by the standard gas supply component. The gas analyzer 9 is used to monitor the gas concentration in the chamber and is used as a standard instrument. In this embodiment, the gas analyzer 9 can be selected as an infrared gas analyzer, which can be purchased. Its structure and function will not be described in detail.

[0024] The standard gas 10 is introduced into the calibration chamber 1 through a pipeline, and then enters the gas analyzer 9 through a pipeline. The gas analyzer 9 continuously monitors the concentration of the gas in the chamber, which serves as the basis for calibration.

[0025] The calibration chamber 1 contains multiple calibration trays 4, each carrying a set of alarm circuit boards 5. As shown in the figure, the alarm circuit boards 5 are mounted in an array on the calibration trays 4, allowing for transfer and simultaneous calibration of the entire tray. This significantly improves calibration efficiency and ease of product relocation, facilitating transfer between different processes (such as between aging and calibration processes) and reducing labor intensity. The figure shows 32 alarm circuit boards 5 mounted on each calibration tray 4, and the calibration chamber 1 contains 3 calibration trays 4, enabling simultaneous calibration of 96 alarm circuit boards 5 in each operation.

[0026] Please see Figure 2 and Figure 3 It can be seen that:

[0027] The calibration tray 4 includes a tray frame 4-1, on which multiple gold finger socket plates 4-5 are installed and multiple sets of gold finger sockets 4-6 are installed on the gold finger socket plates 4-5. Each alarm circuit board 5 is connected to one of the sets of gold finger sockets 4-6 by a plug-in connection.

[0028] The tray frame 4-1 is also equipped with a power supply interface 4-3, a signal transmission interface 4-4, and an interface board 4-2. Each set of gold finger sockets 4-6 is connected to the interface board 4-2 through its respective gold finger socket board 4-5. The power supply interface 4-3 and the signal transmission interface 4-4 are connected to the interface board 4-2. In this embodiment, the power supply interface 4-3 and the signal transmission interface 4-4 of each calibration tray 4 are connected to the display instrument and the operation panel 3 through a wiring harness located inside the box.

[0029] In this embodiment, the gold finger socket plate 4-5 is a strip plate and each set of gold finger sockets 4-6 is arranged along the length direction. The gold finger socket plates 4-5 are arranged in parallel. Ventilation holes 4-8 are provided on the tray frame 4-1 and between adjacent gold finger socket plates 4-5. The purpose of providing ventilation holes 4-8 is to improve air permeability and allow the calibration gas 10 injected into the box to pass through the ventilation holes 4-8 during the calibration process.

[0030] Figure 5The circuit diagram of interface board 4-2 is shown, indicating that it provides eight-channel interface functionality. Correspondingly, eight gold finger socket boards 4-5 are mounted on tray 4-1 and connect to the eight channels of interface board 4-2. Interface board 4-2 connects to the eight gold finger socket boards 4-5 via a double-row pin connector. The main function of interface board 4-2 is to provide power to the eight channels (each with four gold finger sockets 4-6) required by the alarm circuit boards 5, and to establish a signal path between each alarm circuit board 5 and the MCU, uploading data to the host computer 8 via a USART serial port. Interface board 4-2 contains one MCU main control chip and eight 4-channel dual-pole analog switch chips. The MCU main control chip manages the power supply control of the eight channels and the signal communication control of the 32 alarm circuit boards 5. The analog switch chips are controlled by the MCU, ensuring that data from each alarm circuit board 5 is uploaded sequentially.

[0031] Figure 5 The circuit diagram of the gold finger socket board 4-5 is provided. It can be seen that each gold finger socket board 4-5 provides four sets of gold finger sockets 4-6. Each set of gold finger sockets 4-6 has two gold finger sockets 4-6 arranged along the length of the gold finger socket board 4-5. Each alarm circuit board 5 occupies one set, that is, two gold finger sockets 4-6, and the connection is established by plugging in. The gold finger socket board 4-5 mainly provides the connection interface for the alarm circuit board 5. The gold fingers of the alarm circuit board 5 are inserted into the gold finger socket board 4-5, and power and data communication are achieved through the connection interface with the interface board 4-2. The use of gold finger connections is because it allows for plug-and-play operation, is convenient and reliable, easy to maintain, and effectively improves production efficiency.

[0032] In this embodiment, a handle 4-7 for moving the calibration tray 4 is also provided on the tray frame 4-1. The function of providing the handle 4-7 is to improve the ease of operation of moving the calibration tray 4 and the alarm circuit board 5 it carries.

[0033] Considering that uniform distribution of the calibration gas 10 within the calibration chamber 1 will help achieve better calibration results and allow the gas analyzer 9 to obtain more accurate gas concentration values, in this embodiment, a stirring fan (not shown in the figure) is also provided inside the calibration chamber 1. The stirring fan is connected to the display instrument and the operation panel 3. When the calibration process of the alarm circuit board 5 is started, the stirring fan inside the chamber is activated, and the calibration gas 10 injected into the chamber mixes with the air inside the chamber. The gas concentration inside the chamber can be controlled by controlling the calibration gas supply component.

[0034] A sealing structure is provided between the cover and the calibration chamber 1, forming a closed air chamber space inside the calibration chamber 1 when the cover is closed. The display instrument and operation panel 3 include a display instrument and an operation panel with operation buttons. The display instrument is used to display the operating status of the calibration device, and the operation buttons on the operation panel are used to operate the calibration process, such as controlling the input of calibration gas 10, starting and stopping the stirring fan, etc.

[0035] To facilitate the reception and statistical analysis of calibration results, a host computer 8 can be configured for the aforementioned calibration device. The signal transmission interfaces 4-4 of each calibration tray 4 are connected to the host computer 8 via external wiring harnesses. The calibration status and conclusions of each alarm circuit board 5 on each calibration tray 4 are sent to the host computer 8 for display and storage. The host computer 8 displays the calibration conclusions on its display interface, indicating the locations of alarm circuit boards 5 that failed calibration, allowing for quick identification of the failed products for further processing.

Claims

1. A calibration device for an alarm circuit board, characterized in that: The system includes a calibration housing (1) with a slewable cover, a calibration panel (2) mounted on the front of the calibration housing (1), and a display instrument and an operation panel (3) on the calibration panel (2). Multiple calibration trays (4) are located inside the calibration housing (1), and multiple alarm circuit boards (5) are mounted on the calibration trays (4). The calibration trays (4) include a tray frame (4-1), on which multiple gold finger socket boards (4-5) are mounted, and on which multiple sets of gold finger sockets (4-6) are mounted. -1) is also equipped with a power supply interface (4-3), a signal transmission interface (4-4) and an interface board (4-2). Each group of gold finger sockets (4-6) is connected to the interface board (4-2) through the gold finger socket board (4-5) where it is located. The power supply interface (4-3) and the signal transmission interface (4-4) are connected to the interface board (4-2). The calibration box (1) is also equipped with a standard gas interface (6) and a gas analyzer interface (7). The standard gas interface (6) is connected to the standard gas (10) through a pipeline, and the gas analyzer interface (7) is connected to the gas analyzer (9) through a pipeline.

2. The calibration device for the alarm circuit board as described in claim 1, characterized in that: The gold finger socket plate (4-5) is a strip plate and each set of gold finger sockets (4-6) is arranged along the length direction. Each gold finger socket plate (4-5) is arranged in parallel. Ventilation holes (4-8) are provided on the tray frame (4-1) and between adjacent gold finger socket plates (4-5).

3. The calibration device for the alarm circuit board as described in claim 2, characterized in that: The power supply interface (4-3) and signal transmission interface (4-4) of each calibration tray (4) are connected to the display instrument and operation panel (3) through the wiring harness located in the box.

4. The calibration device for the alarm circuit board as described in claim 3, characterized in that: The pallet rack (4-1) is also equipped with a handle (4-7) for moving the calibration pallet (4).

5. The calibration device for the alarm circuit board as described in claim 4, characterized in that: A stirring fan is also provided inside the calibration box (1), and the stirring fan is connected to the display instrument and the operation panel (3).

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