DMH-3104 signal processing module function test clamp

Abstract

The utility model discloses a DMH-3104 signal processing module function test fixture, the test fixture is composed of a power supply module, an analog signal generation and switching module, a working current measurement module, a relay state monitoring module and a communication module, the power supply module is used for providing DC 24V voltage; the analog signal generation and switching module comprises at least one control switch and is used for simulating different sensor states and outputting analog signals to the detector input end of the module to be tested; the working current measuring module comprises a power supply switch and is used for controlling the power supply of a power supply of the to-be-measured module and measuring the working current of the to-be-measured module through an ampere meter; and the relay state monitoring module comprises a plurality of groups of probes which are respectively connected to relay contacts of the to-be-tested module, and the relay state is displayed through an indicating device. The test fixture can comprehensively test the function of the DMH-3104 signal processing module, and the test convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic test equipment, and specifically, it is a test fixture for testing the functions of a DMH-3104 signal processing module. Background Art

[0002] With the rapid development of modern electronic technology, signal processing modules have become the core components in electronic devices, and their stability and reliability have a decisive impact on the overall performance of the devices. As a key signal processing device widely used in different scenarios in various industries, the quality control and maintenance inspection of the DMH-3104 signal processing module during the production process are particularly important. However, traditional test equipment has various limitations when facing the complex test requirements of the DMH-3104 signal processing module.

[0003] Firstly, traditional test equipment has a single function in simulating sensor states and is difficult to flexibly simulate various sensor states, resulting in insufficient test coverage and being unable to comprehensively evaluate the performance of the DMH-3104 signal processing module under different working scenarios. Secondly, although some traditional equipment has the function of measuring working current, it often lacks a power supply customized for the DMH-3104 signal processing module and a precise measurement circuit design, leading to errors in measurement results in actual applications and further affecting the accurate judgment of the module's performance. In addition, traditional test equipment has obvious deficiencies in monitoring and indicating the relay state, and is unable to perform real-time monitoring and clear indication of the relay state in the DMH-3104 signal processing module, making it impossible for testers to accurately judge the on-off state and performance of the relay, which is crucial for ensuring the normal operation of the relay in the module and timely troubleshooting. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the utility model provides a test fixture for testing the functions of a DMH-3104 signal processing module to solve the deficiencies in function testing of existing test equipment and improve the convenience of testing.

[0005] The technical solution of the utility model is as follows: A test fixture for testing the functions of a DMH-3104 signal processing module, including:

[0006] A power supply module for providing a DC24V voltage;

[0007] An analog signal generation and switching module, including at least one control switch, for simulating different sensor states and outputting an analog signal to the detector input end of the module to be tested;

[0008] A working current measurement module, including a power supply switch for controlling the power supply of the module to be tested and measuring the working current of the module to be tested through an ammeter;

[0009] The relay status monitoring module includes multiple groups of probes, which are respectively connected to the relay contacts of the module to be tested, and the relay status is displayed through an indicating device;

[0010] Preferably, the power supply module is provided with a DC24V power input interface. After passing through a FUSE and an anti-reverse connection protection diode D1, it is divided into two output paths: one path is converted into the voltage required by the sensor through an isolated DC / DC switching power supply module U1, and a resistor voltage division network is formed by resistors R2 / R6, R3 / R7, R4 / R8, and R5 / R9 to generate an analog alarm signal; the other path is converted into a DC5V voltage through an isolated DC / DC switching power supply module U2 for use by the digital ammeter.

[0011] Preferably, the control switch includes switches K1, K2, and K3, which are respectively used to simulate the sensor states of room temperature / fire alarm, short circuit / normal, and open circuit / normal. Among them, switch K1 is used to control the access or disconnection of the basic voltage to change the output signal of the resistor voltage division network; switch K2 is used to control the energization or de-energization of relays J2 to J5 to simulate the short circuit / normal state of the sensor; switch K3 is used to control the energization or de-energization of relay J6 to simulate the open circuit / normal state of the sensor.

[0012] Preferably, the working current measurement module includes a power supply switch K4. When the power supply switch K4 is closed, the DC24V power supply is connected to the power supply terminal DC+ of the module to be tested through the contacts of relay J7 and the ammeter, and the power supply terminal DC- of the module to be tested is connected to the GND of DC24V to form a power supply and working current measurement loop.

[0013] Preferably, the working current measurement module further includes a working indicator LED9. When switch K4 is closed, LED9 lights up to indicate that the test fixture is in a working state.

[0014] Preferably, the relay status monitoring module includes 8 groups of probes Probe11 / Probe12 to Probe25 / Probe26, which are respectively connected to 8 output relay contacts of the module to be tested, and the off / on states of the relays are indicated by LED1 to LED8.

[0015] Preferably, there is also a communication module for realizing data exchange between the module to be tested and external test equipment.

[0016] Preferably, the communication module includes communication probes, and the communication probes are connected to external test equipment through transmission cables.

[0017] The beneficial effects of the present utility model are as follows: The test fixture of the present utility model can accurately simulate different working states of the sensor, measure the working current of the module through the ammeter measurement module, and monitor the status of the relay through the LED indicator, so as to realize the comprehensive test of the functions of the DMH-3104 signal processing module. At the same time, through the data exchange with external test equipment by the communication module, the test data can be recorded and analyzed in real time, improving the convenience of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 FIG. is a schematic structural diagram of a function test fixture for a DMH-3104 signal processing module provided by the present utility model;

[0020] Figure 2 FIG. is a circuit diagram of a function test fixture for a DMH-3104 signal processing module provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will describe in detail the embodiments of the technical solutions of the present utility model in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.

[0022] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0023] As Figure 1-2 shown, the present utility model provides a function test fixture for a DMH-3104 signal processing module, including: a power supply module for providing a DC24V voltage; an analog signal generation and switching module including at least one control switch for simulating different sensor states and outputting an analog signal to the detector input end of the module to be tested; a working current measurement module including a power supply switch for controlling the power supply of the module to be tested and measuring the working current of the module to be tested through an ammeter; a relay state monitoring module including multiple groups of probes respectively connected to the relay contacts of the module to be tested and displaying the relay state through an indicating device;

[0024] In this embodiment, the power supply module is provided with a DC24V power input interface. After passing through a FUSE and an anti-reverse connection protection diode D1, it is divided into two output paths: one path is converted into the voltage required by the sensor through an isolated DC / DC switching power supply module U1, and a resistor voltage division network is formed by resistors R2 / R6, R3 / R7, R4 / R8, and R5 / R9 to generate an analog alarm signal; the other path is converted into a DC5V voltage through an isolated DC / DC switching power supply module U2 for use by the digital ammeter.

[0025] In this embodiment, the control switch includes switches K1, K2, and K3, which are respectively used to simulate the sensor states of room temperature / fire alarm, short circuit / normal, and open circuit / normal. Among them, switch K1 is used to control the access or disconnection of the basic voltage to change the output signal of the resistor voltage division network; switch K2 is used to control the energization or de-energization of relays J2 - J5 to simulate the short circuit / normal state of the sensor; switch K3 is used to control the energization or de-energization of relay J6 to simulate the open circuit / normal state of the sensor.

[0026] In this embodiment, the working current measurement module includes a power supply switch K4. When the power supply switch K4 is closed, the DC24V power supply is connected to the power terminal DC+ of the module to be tested through the contacts of relay J7 and the ammeter, and the power terminal DC- of the module to be tested is connected to the GND of DC24V to form a power supply and working current measurement loop.

[0027] In this embodiment, the working current measurement module further includes a working indicator LED9. When switch K4 is closed, LED9 lights up to indicate that the test fixture is in the working state.

[0028] In this embodiment, the relay status monitoring module includes 8 groups of probes Probe11 / Probe12 to Probe25 / Probe26, which are respectively connected to 8 output relay contacts of the module to be tested, and the off / on states of the relays are indicated by LEDs 1 to 8.

[0029] In this embodiment, there is also a communication module for realizing data exchange between the module to be tested and external test equipment.

[0030] In this embodiment, the communication module includes communication probes, and the communication probes are connected to external test equipment through transmission cables.

[0031] During the testing process, first install the DMH-3104 signal processing module to be tested on the test fixture and connect each probe to the relay contact. Then, operate switches K1, K2, and K3 as needed to simulate different sensor states. Read the working current of the module to be tested through the ammeter and observe the relay state through LED1 to LED8. Finally, monitor and record the test data in real time through an external test computer.

[0032] The test fixture of the present utility model can accurately simulate different working states of the sensor, measure the working current of the module through the ammeter, and monitor the state of the relay through the LED indicator, so as to realize a comprehensive test of the functions of the DMH-3104 signal processing module. At the same time, through the data exchange of the communication module with external test equipment, the test data can be recorded and analyzed in real time, improving the convenience of the test.

[0033] The present utility model adopts an integrated design, simplifies the test process, improves the test efficiency, does not require the use of multiple devices and complex operations, reduces the test cost, can accurately simulate various sensor states, and monitors the relay state in real time, and is applicable to the rapid test and verification in the production and maintenance processes of the DMH-3104 signal processing module.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model 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 described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model.

Claims

1. A DMH-3104 signal processing module functional test fixture, characterized in that: include: Power module, used to provide DC24V voltage; The analog signal generation and switching module includes at least one control switch for simulating different sensor states and outputting analog signals to the detector input terminal of the module to be tested; A working current measurement module, including a power switch, is used to control the power supply of the module to be tested and measure the working current of the module to be tested through an ammeter; The relay status monitoring module includes a plurality of probe groups, which are respectively connected to the relay contacts of the module to be tested, and displays the relay status through an indicating device.

2. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: The power module is provided with a DC24V power input interface, which is divided into two outputs after passing through a FUSE insurance and an anti-reverse connection protection diode D1: one is converted into the voltage required by the sensor through an isolated DC / DC switching power module U1, and a resistor voltage divider network is formed through resistors R2 / R6, R3 / R7, R4 / R8, and R5 / R9 to generate an analog alarm signal; the other is converted into a DC5V voltage through an isolated DC / DC switching power module U2 for use by a digital ammeter.

3. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: The control switches include switches K1, K2, and K3, which are respectively used to simulate the sensor states of room temperature / fire alarm, short circuit / normal, and open circuit / normal. Among them, switch K1 is used to control the connection or disconnection of the basic voltage to change the output signal of the resistor voltage divider network; switch K2 is used to control the power on or off of relays J2 to J5 to simulate the short circuit / normal state of the sensor; switch K3 is used to control the power on or off of relay J6 to simulate the open circuit / normal state of the sensor.

4. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: The working current measurement module includes a power supply switch K4. When the power supply switch K4 is closed, the DC24V power supply is connected to the power terminal DC+ of the module to be tested through the relay J7 contact and the ammeter, and the power terminal DC- of the module to be tested is connected to the GND of DC24V, forming a power supply and working current measurement loop.

5. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: The working current measurement module further includes a working indicator light LED9. When the switch K4 is closed, the LED9 lights up, indicating that the test fixture is in working state.

6. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: The relay status monitoring module includes 8 groups of probes Probe11 / Probe12 to Probe25 / Probe26, which are respectively connected to 8 output relay contacts of the module to be tested, and indicate the disconnection / connection status of the relay through LED1 to LED8.

7. A DMH-3104 signal processing module functional test fixture according to claim 1, characterized in that: A communication module is also provided to realize data exchange between the test module to be tested and external test equipment.

8. A DMH-3104 signal processing module function test fixture according to claim 7, characterized in that: The communication module includes a communication probe, and the communication probe is connected to an external test device via a transmission cable.

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