Analog acquisition channel self-checking device

Abstract

The utility model discloses a kind of analog acquisition channel self-checking devices, including acquisition chip, relay.The first input end of the relay is connected with constant power supply, the second input end of the relay is connected with acquisition channel connector, and the output end of the relay is connected to the acquisition chip;Wherein, constant power supply output standard analog quantity, the relay is selected between the first input end and the output end and the second input end and the output end Gate. Thus, analog acquisition channel self-checking device itself is provided with constant power supply or the circuit of external constant power supply, to pass through the voltage of constant power supply output as standard analog quantity realizes the self-checking function of acquisition channel. In this way, additional equipment is not needed to be set to carry out self-checking, additional debugging and connection process are not needed, entire self-checking process is more convenient, fast.

Description

Technical Field

[0001] This utility model relates to the field of data acquisition channel detection technology, and in particular to a simulated data acquisition channel self-testing device. Background Technology

[0002] In existing technologies, to confirm whether the equipment used for analog signal acquisition is in good working order, it is necessary to test whether the acquisition channel is working properly before using the equipment. Typically, this is done by injecting an analog signal into the analog channel using an external instrument and then acquiring this injected analog signal to perform a self-test.

[0003] The above-mentioned detection methods require separate external instruments. During the detection process, different devices need to be connected and the external instruments need to be debugged, which makes the detection process complicated and inefficient. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-testing device for analog acquisition channels, which can quickly detect analog acquisition equipment.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A self-testing device for an analog acquisition channel includes an acquisition chip and a relay. A first input terminal of the relay is connected to a constant power supply, a second input terminal of the relay is connected to an acquisition channel connector, and an output terminal of the relay is connected to the acquisition chip. The constant power supply outputs a standard analog signal, and the relay selects between the first input terminal and the output terminal, and between the second input terminal and the output terminal.

[0007] Furthermore, the constant power supply is connected in parallel with a first resistor and a second resistor, the first resistor being connected to the relay and the second resistor being grounded.

[0008] Furthermore, the voltage of the constant power supply is 5V.

[0009] Furthermore, the first resistor and the second resistor have the same resistance value.

[0010] Furthermore, when the relay connects the first input terminal and the output terminal, the acquisition chip is in the self-test mode; when the relay connects the second input terminal and the output terminal, the acquisition chip is in the usage mode.

[0011] Furthermore, the relay is provided with a selection switch, which switches between different energized sides of the relay.

[0012] The beneficial effects of this invention are: the analog acquisition channel self-test device itself is equipped with a circuit for a constant power supply or an external constant power supply, using the voltage output by the constant power supply as a standard analog quantity to achieve the self-test function of the acquisition channel. This eliminates the need for additional equipment for self-testing, as well as additional debugging and connection processes, making the entire self-testing process more convenient and faster. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the simulated acquisition channel self-testing device implemented according to this application. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] See Figure 1 This utility model provides a technical solution:

[0016] A self-testing device for an analog acquisition channel includes: an acquisition chip and a relay.

[0017] refer to Figure 1 As shown, the first input terminal of the relay is connected to a constant power supply, which outputs a constant voltage as a standard analog quantity. The second input terminal of the relay is connected to a data acquisition channel connector. In this embodiment, the data acquisition channel connector can be a component in a data acquisition system used to connect sensors, data acquisition cards, and cables; its main function is to achieve reliable signal transmission and physical connection. The output terminal of the relay is connected to the acquisition chip. Thus, by selecting between the first input terminal and the output terminal, and between the second input terminal and the output terminal, the switching between component mode and usage mode is achieved.

[0018] In detail, when the relay connects the first input and output terminals, the acquisition chip is in self-test mode. The standard analog quantity output by the constant power supply is input to the acquisition chip through the relay connection, and the acquisition chip acquires the standard analog quantity. At this time, the constant voltage, as a standard analog quantity, essentially provides a known and reproducible reference signal, which can complete the self-test process based on the signal integrity verification and channel function verification of the acquisition chip.

[0019] After completing the self-test, the control relay selects the normal acquisition channel and exits the self-test mode. In other words, when the relay connects the second input and output terminals, the acquisition chip is in operation mode. At this time, the acquisition chip is used to acquire the analog signal from the acquisition channel connector for normal acquisition.

[0020] It is understood that the analog acquisition channel self-test device in this application embodiment is equipped with a circuit for a constant power supply or an external constant power supply, using the voltage output by the constant power supply as a standard analog quantity to realize the self-test function of the acquisition channel. In this way, no additional equipment is required for self-testing, and no additional debugging or connection process is needed, making the entire self-testing process more convenient and faster.

[0021] In some examples, continue to refer to Figure 1 The constant power supply is connected in parallel with a first resistor and a second resistor. The first resistor is connected to the relay, and the second resistor is grounded. In this way, the constant power supply is divided by the two resistors, making the detection circuit safer and more reliable, and ensuring that the generated standard analog signal meets the detection requirements.

[0022] For example, a constant power supply with a voltage of 5V generates a self-test voltage of 5V*R2 / (R1+R2) after being divided by a first resistor (R1) and a second resistor (R2). The program then controls a relay switch to select between the self-test and normal data acquisition channels. When a self-test is required, the relay switch connects to the self-test channel, and the data acquisition chip detects the self-test voltage 5V*R2 / (R1+R2), thus performing the self-test. After the self-test is complete, the relay switch connects to the normal data acquisition channel, exiting the self-test mode and entering normal operation mode. In this example, a resistor voltage divider is used to generate the self-test excitation source, and the self-test is completed through program-controlled switching. This self-test method is convenient and quick to implement, requiring no external equipment, and involves few components, resulting in low cost.

[0023] In some examples, the difference from the previous example is that the relay is equipped with a selector switch instead of automatic switching. The selector switch switches different energized sides of the relay, and the user selects the path by pressing or toggling the selector switch.

[0024] In some examples, the first resistor and the second resistor have the same resistance value to form a voltage of 2.5V as a standard analog quantity.

[0025] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An analog acquisition channel self-test device, comprising: include: Data acquisition chip; A relay, wherein a first input terminal of the relay is connected to a constant power supply, a second input terminal of the relay is connected to a data acquisition channel connector, and the output terminal of the relay is connected to the data acquisition chip; The constant power supply outputs a constant voltage as a standard analog quantity, and the relay selects between the first input terminal and the output terminal, as well as between the second input terminal and the output terminal.

2. The analog acquisition channel self-test apparatus of claim 1, wherein, The constant power supply is connected in parallel with a first resistor and a second resistor. The first resistor is connected to the relay, and the second resistor is grounded.

3. The analog acquisition channel self-test apparatus of claim 1 or 2, wherein, The voltage of the constant power supply is 5V.

4. The analog acquisition channel self-test apparatus of claim 2, wherein, The resistance values ​​of the first resistor and the second resistor are equal.

5. The analog acquisition channel self-test apparatus of claim 1, wherein, When the relay connects the first input terminal and the output terminal, the acquisition chip is in self-test mode; when the relay connects the second input terminal and the output terminal, the acquisition chip is in use mode.

6. The analog acquisition channel self-test apparatus of claim 1 or 5, wherein, The relay is equipped with a selector switch, which switches between different energized sides of the relay.

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