Direct-current pump / valve starting voltage and current automatic detection device

Abstract

The utility model discloses an automatic detection device for starting voltage and current of a direct-current pump / valve. The automatic detection device comprises a voltage detection module, a current detection module, a CPU and a man-machine interaction module, the voltage detection module and the current detection module are respectively connected with the detected direct-current pump / valve through the pump / valve expansion interface; the CPU is in CAN communication connection with the man-machine interaction module, enables an industrial personal computer of a detected instrument to start a specified detected direct-current pump / valve in a CAN communication mode, and obtains values detected by the voltage and current detection module connected with the detected direct-current pump / valve at the same time. The man-machine interaction module is used for presetting a measurement gear and a sampling frequency of starting current and voltage of the direct-current pump / valve, and sending the measurement gear, the sampling frequency and a starting test command to the CPU; and the voltage value and the current value obtained from the CPU are displayed in real time. According to the utility model, automatic measurement of starting voltage and current of a plurality of direct-current pumps / valves is realized, and real-time display, automatic recording and summarizing storage of measured data are supported.

Description

Technical Field

[0001] The utility model relates to a DC pump detection for an instrument, in particular to a DC pump / valve starting voltage and current automatic detection device. Background Art

[0002] With the development of electronic technology, the demand for DC pumps and valves in various types of experimental analysis instruments such as chemiluminescence immunoassay analyzers is increasing day by day. During the operation of the above instruments, the DC pump / valve (DC pump or DC solenoid valve, DC electric valve) will generate a large starting current and voltage fluctuation at the moment of starting, which will affect the current electronic control system of the instrument and even cause failures (such as causing the fuse-type device to fuse or the driver chip to be damaged), resulting in the DC pump / valve being unable to work. For this reason, after the instrument is manufactured, the starting instant current and voltage of the DC pump / valve used need to be factory tested to ensure the normal operation of the instrument. At present, the measurement of the starting current and voltage of the DC pump / valve used in the instrument is mainly carried out manually, that is, the tester operates the instrument to start the DC pump / valve under test, and uses a multimeter or oscilloscope and other measuring tools to manually measure, and then record and summarize them one by one. However, with the improvement of the automation level of the instrument and the expansion of its functions, the number of DC pumps / valves used is large, making the detection work extremely cumbersome and repetitive. In addition, due to space limitations, some instruments are large in size and it is difficult to operate the instrument to start the DC pump / valve and measure the starting current and voltage independently and simultaneously. The cooperation of others is required, and the entire measurement cycle is time-consuming and inefficient. Summary of the invention

[0003] The utility model aims to provide a DC pump / valve starting voltage and current automatic detection device to improve the DC pump starting voltage and current detection efficiency.

[0004] In order to achieve the above purpose, the utility model can adopt the following technical solutions:

[0005] The DC pump / valve startup voltage and current automatic detection device described in the utility model comprises a measuring unit and a control unit, wherein the measuring unit comprises: a voltage detection module and a current detection module for detecting the voltage and current of N DC pumps / valves, where N is greater than or equal to 2; the voltage detection module and the current detection module are respectively connected to the DC pump / valve to be detected through a pump / valve expansion interface;

[0006] The control unit includes a CPU and a human-computer interaction module; the CPU is connected to the human-computer interaction module via CAN communication; receiving a start test command sent from the human-computer interaction module, enabling the industrial computer of the instrument under test to start the specified DC pump / valve under test via CAN communication, and simultaneously obtaining the voltage value and current value detected by the voltage detection module and the current detection module connected to the DC pump / valve under test;

[0007] The human-computer interaction module is used to preset the measurement gear and sampling frequency of the DC pump / valve starting current and voltage, and send the measurement gear, sampling frequency and start test command to the CPU via CAN communication; and display the voltage and current values ​​detected by the voltage detection module and the current detection module obtained from the CPU in real time.

[0008] Optionally, it further includes a storage module connected to the CPU; when the CPU receives a data storage command sent by the human-computer interaction module, it stores the voltage and current measurement data imported from the CPU in the form of a file.

[0009] Furthermore, the storage module has a USB interface for copying and transferring the voltage and current measurement data.

[0010] The utility model adopts the CAN communication mode with the industrial computer of the instrument under test to control the instrument under test to start multiple groups of DC pumps / valves, and realizes the automatic measurement of the starting voltage and current of multiple DC pumps / valves at the same time. The measurement efficiency is extremely high, and it supports real-time display, automatic recording, and summary storage of measurement data. At the same time, the matching measurement gear and sampling frequency can be selected according to the rated current range and voltage range of the DC pump / valve under test, which not only meets the measurement accuracy requirements but also has a wider measurement range, and is suitable for more DC pump / valve models. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the circuit principle structure of the utility model.

[0012] Figure 2 It is a reference diagram of the human-computer interaction interface of the present utility model. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B as an example", it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0016] like Figure 1 , 2 As shown, the DC pump / valve starting voltage and current automatic detection device described in the utility model includes a measuring unit 1 and a control unit 2.

[0017] The measuring unit 1 comprises: a voltage detection module and a current detection module for detecting the voltage and current of N DC pumps / valves, where N is a natural number greater than 2; the voltage detection module and the current detection module are respectively connected to the DC pump / valve to be detected through a pump / valve expansion interface.

[0018] The voltage detection module can select a voltage detection chip (model: V9203, with 3 voltage detection interfaces). When the number of its detection interfaces is less than the number N of DC pumps / valves to be tested, multiple voltage detection chips can be connected in parallel.

[0019] The current detection module can select a current detection chip (model: V9203, with 3 current detection interfaces). When the number of detection interfaces is less than the number N of DC pumps / valves to be tested, multiple current detection chips can also be connected in parallel.

[0020] The control unit 2 includes a CPU (central processing unit, model: STM32G473QBT6) and a human-machine interaction module (model: eTOP-PA70V10-C); the CPU is connected to the human-machine interaction module through CAN communication, and is used to enable the industrial computer of the instrument under test to start the DC pump / valve under test with a specified number through CAN communication when receiving a start test command sent from the human-machine interaction module, and at the same time obtain the voltage value and current value detected by the voltage detection module and the current detection module connected to the DC pump / valve under test.

[0021] The human-computer interaction module is used to preset the measurement gear and sampling frequency of the DC pump / valve starting current and voltage, and send the measurement gear, sampling frequency and start test command to the CPU through CAN communication; it displays in real time the voltage and current values ​​of the DC pump / valve under test with a specified number detected by the voltage detection module and the current detection module obtained from the CPU.

[0022] When the CPU receives the voltage measurement gear sent by the human-computer interaction module, the CPU first assigns a value to the voltage measurement gear register (built-in the CPU) and calls the voltage measurement gear subroutine to control the voltage measurement gear switching of the voltage detection module.

[0023] Similarly, when the CPU receives the current measurement gear sent by the human-computer interaction module, the CPU first assigns a value to the current measurement gear register (built-in the CPU), calls the current measurement gear subroutine, and controls the current measurement gear switching of the current detection module.

[0024] When the CPU receives the voltage sampling frequency sent by the human-computer interaction module, the CPU first assigns a value to the voltage sampling frequency register (built-in the CPU) and calls the voltage sampling frequency subroutine to control the voltage sampling frequency switching of the voltage detection module.

[0025] Similarly, when the CPU receives the current sampling frequency sent by the human-computer interaction module, the CPU first assigns a value to the current sampling frequency register (built-in the CPU), calls the current sampling frequency subroutine, and controls the current sampling frequency switching of the current detection module.

[0026] Advantageously or exemplarily, the CPU data interface is also connected to a storage module; when the CPU receives a data storage command sent by the human-computer interaction module, the voltage and current measurement data imported from the CPU in the form of a file are received and stored.

[0027] Advantageously or exemplarily, the storage module is provided with a USB interface for copying and transferring the voltage and current measurement data.

[0028] The working process of this utility model is briefly described as follows:

[0029] First, establish a hardware connection between the DC pump / valve of the instrument under test and the pump / valve expansion interface, and establish a hardware connection between the CPU and the industrial computer of the instrument under test; secondly, set the voltage measurement gear, current measurement gear, voltage sampling frequency, and current sampling frequency on the human-computer interaction interface. When the instrument under test is ready, click to start the test on the human-computer interaction interface. When the DC pump / valve of the instrument under test is started, the voltage and current automatic measurement begins.

[0030] The human-computer interaction module obtains the measurement data from the CPU in real time through CAN communication and displays it in the data receiving window, namely:

[0031] The starting voltage measurement value of DC pump / valve 1-n is displayed in the voltage measurement data display box of the human-computer interaction interface, and the starting current measurement value of DC pump / valve 1-n is displayed in the current measurement data display box of the human-computer interaction interface. Finally, when the voltage measurement data display box shows that the voltage measurement is completed and the current measurement data display box shows that the current measurement is completed, it means that the automatic measurement is completed. After clicking the data storage in the human-computer interaction interface, all the measurement data will be saved. After that, the measurement data in the voltage measurement data display box and the current measurement data display box will be cleared so that the next round of measurement can be entered later.

[0032] The load measured by the utility model is not limited to DC pumps / valves, but also includes voltage and current detection of DC loads such as heating films and refrigerators. At the same time, the utility model is not limited to the measurement of starting voltage and current, but also includes voltage and current measurement under no-load operation, full-load operation and other conditions.

Claims

1. A DC pump / valve starting voltage and current automatic detection device, comprising a measuring unit and a control unit, characterized in that: The measuring unit comprises: A voltage detection module and a current detection module for detecting the voltage and current of N DC pumps / valves, N≥2; the voltage detection module and the current detection module are respectively connected to the DC pump / valve of the instrument under test through the pump / valve expansion interface; The control unit includes a CPU and a human-computer interaction module; The CPU is connected to the human-computer interaction module via CAN communication; receives a start test command sent from the human-computer interaction module, and enables the industrial computer of the instrument under test to start the specified DC pump / valve under test through CAN communication, and simultaneously obtains the voltage value and current value detected by the voltage detection module and the current detection module connected to the DC pump / valve under test; The human-computer interaction module is used to preset the measurement gear and sampling frequency of the DC pump / valve starting current and voltage, and send them to the CPU via CAN communication; it displays the voltage and current values ​​detected by the voltage detection module and the current detection module sent by the CPU.

2. The DC pump / valve startup voltage and current automatic detection device according to claim 1 is characterized in that: It also includes a storage module connected to the CPU, which is used to store the voltage and current measurement data imported from the CPU in the form of files.

3. The DC pump / valve startup voltage and current automatic detection device according to claim 2 is characterized in that: The storage module is provided with a USB interface for copying and transferring the voltage and current measurement data.

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