Control loop testing device

Abstract

The invention discloses a control loop testing device, which comprises an AC / DC signal conversion circuit used for performing automatic digital conversion on an input level signal to obtain a digital signal; the electromagnetic isolation circuit is connected with the AC / DC signal conversion circuit and is used for realizing an electromagnetic isolation function on the AC / DC signal conversion circuit; the long-time feedback circuit is connected with the electromagnetic isolation circuit and used for responding to the digital signal; the signal reset circuit is connected with the long-time feedback circuit and is used for performing signal reset operation on the long-time feedback circuit; and the working power supply circuit is used for supplying power to the control loop testing device. The accuracy and portability of the control loop testing device are improved, and action delay caused by a mechanical structure of a relay auxiliary contact is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power equipment, and more specifically, relates to a control loop testing device. Background Art

[0002] In the field of control loop testing, the prior art usually uses relays to implement action logic. However, this method has many disadvantages. The relay auxiliary contacts are mechanical structures, and there will be action delays when they are in action, which may lead to inaccurate test results. In addition, since it is necessary to select the voltmeter gear according to whether the power supply of the control loop is AC or DC, the operation is relatively cumbersome. At the same time, in order to protect the circuit-related components, it is also necessary to select appropriate resistors to protect the circuit, which increases the cost and complexity. Moreover, the use of relays to implement action logic will make the overall structure of the device larger, inconvenient to carry, and bring inconvenience to on-site testing.

[0003] With the continuous development of science and technology, the requirements for control loop test devices are getting higher and higher. People hope to have a control loop test device that is easy to test, lightweight and easy to carry. Therefore, the development of a new control loop test device has important practical significance. The present invention aims to solve the problems existing in the prior art and provide a control loop test device based on a PCB board. The function of the control loop test is realized by drawing a PCB board to overcome the problems such as action delay caused by the mechanical structure of the relay auxiliary contact, while realizing the miniaturization and portability of the device and improving the convenience and accuracy of the test.

[0004] Therefore, how to improve the accuracy and portability of the control loop test device and avoid the action delay caused by the mechanical structure of the relay auxiliary contact is a key issue that technical personnel in this field are concerned about. Summary of the invention

[0005] The purpose of the present application is to provide a control loop test device to improve the accuracy and portability of the control loop test device and avoid the action delay caused by the mechanical structure of the relay auxiliary contact.

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a control loop testing device, comprising:

[0007] The AC / DC signal conversion circuit is used to automatically convert the input level signal into a digital signal to obtain a digital signal;

[0008] An electromagnetic isolation circuit connected to the AC / DC signal conversion circuit and used to implement an electromagnetic isolation function for the AC / DC signal conversion circuit;

[0009] A long-time feedback circuit connected to the electromagnetic isolation circuit and used to respond to the digital signal;

[0010] A signal reset circuit connected to the long-time feedback circuit and used to perform a signal reset operation on the long-time feedback circuit;

[0011] The working power supply circuit is used to supply power to the control loop test device.

[0012] Optionally, the long-time feedback circuit includes: a signal feedback circuit, a buzzer circuit, and an indicator light circuit; the buzzer circuit and the indicator light circuit are respectively connected to the signal feedback circuit;

[0013] The signal feedback circuit is used to send a long-term feedback signal when receiving a level signal;

[0014] The buzzer circuit is used to give a sound reminder when receiving the feedback signal;

[0015] The indicator light circuit is used to provide a light reminder when the feedback signal is received.

[0016] Optionally, the signal reset circuit comprises: a reset button and a reset circuit; the reset button is connected to the reset circuit;

[0017] The reset button is used to send a reset signal when pressed;

[0018] The reset circuit is used to perform a reset operation on the long-time feedback circuit based on the reset signal when receiving the reset signal.

[0019] Optionally, also include:

[0020] A pointer-type multimeter is used to monitor the current and voltage of the control loop test device.

[0021] Optionally, also include:

[0022] The voltage and current intelligent detection module is used to detect the input end of the control loop test device to obtain detection data, and generate state detection data based on the detection data.

[0023] Optionally, also include:

[0024] The data recording and storage module is used to record the monitored current data, voltage data and the state detection data.

[0025] Optionally, also include:

[0026] The remote data transmission module is used to send the feedback signal, current data, voltage data, and status detection data to a target terminal.

[0027] A control loop test device provided by the present application includes: an AC / DC signal conversion circuit, which is used to automatically convert an input level signal into a digital signal; an electromagnetic isolation circuit connected to the AC / DC signal conversion circuit, which is used to implement an electromagnetic isolation function for the AC / DC signal conversion circuit; a long-time feedback circuit connected to the electromagnetic isolation circuit, which is used to react to the digital signal; a signal reset circuit connected to the long-time feedback circuit, which is used to perform a signal reset operation on the long-time feedback circuit; and a working power supply circuit, which is used to supply power to the control loop test device.

[0028] It has the following beneficial effects:

[0029] Through the AC / DC signal conversion circuit, automatic digital conversion of the level is achieved, avoiding the cumbersome operation caused by the difference in power supply types and the action delay caused by the mechanical structure of the relay, greatly improving the efficiency and accuracy of the test. Through the electromagnetic isolation circuit, the safety and stability of the system are effectively guaranteed, and the influence of external electromagnetic interference on the internal circuit is prevented. Through the long-term feedback circuit, the tester can obtain the test results intuitively, which enhances the visibility and operability of the test process, so as to improve the accuracy and portability of the control loop test device and avoid the action delay caused by the mechanical structure of the relay auxiliary contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the structure of a control loop testing device provided in an embodiment of the present application;

[0032] Figure 2 A circuit diagram of a control loop testing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The purpose of the present application is to provide a control loop test device to improve the accuracy and portability of the control loop test device and avoid the action delay caused by the mechanical structure of the relay auxiliary contact.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] A control loop testing device provided by the present application is described below through an embodiment.

[0036] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a control loop testing device provided in an embodiment of the present application.

[0037] Please refer to Figure 2 , Figure 2 A circuit diagram of a control loop testing device provided in an embodiment of the present application.

[0038] In this embodiment, the device may include:

[0039] The AC / DC signal conversion circuit is used to automatically convert the input level signal into a digital signal to obtain a digital signal.

[0040] The automatic digital conversion of external 25V-250V AC and DC control circuit level signals is realized by using bidirectional diodes and other components. Its working principle is based on the characteristic differences of different types of diodes in AC and DC circuits, and the conversion of level signals is realized through reasonable circuit design.

[0041] The corresponding electronic components, such as bidirectional diodes, are laid out on the PCB board, and these components are connected through reasonable wiring to construct an AC / DC signal conversion circuit. This avoids the action delay caused by the mechanical structure of the auxiliary contacts of the relay in the prior art, and improves the accuracy and timeliness of the test. At the same time, there is no need to select the voltmeter gear according to whether the power supply of the control circuit is AC or DC, which simplifies the operation process.

[0042] An electromagnetic isolation circuit connected to the AC / DC signal conversion circuit is used to realize the electromagnetic isolation function of the AC / DC signal conversion circuit.

[0043] Electromagnetic isolation is achieved through components such as optocouplers. An optocoupler is a device that uses optical signals to transmit signals. Its input and output ends are electrically isolated, thus achieving the function of electromagnetic isolation.

[0044] Optocoupler components are set on the PCB board and connected according to the circuit design requirements to ensure that it can normally realize the electromagnetic isolation function. This improves the safety and stability of the device, prevents external electromagnetic interference from affecting the internal circuit of the test device, and also avoids the interference of the internal circuit on external devices.

[0045] A long-time feedback circuit connected to the electromagnetic isolation circuit for responding to the digital signal.

[0046] The long-time feedback circuit includes a signal feedback circuit, a buzzer circuit and an indicator light circuit. The signal feedback circuit can send a long-time feedback signal when receiving a level signal. The buzzer circuit gives a sound reminder when receiving a feedback signal, and the indicator light circuit gives a light reminder when receiving a feedback signal.

[0047] The buzzer, indicator light and related signal feedback circuit components are set on the PCB board and connected through reasonable wiring to realize the function of the long-term feedback circuit. The tester can intuitively understand the test results through sound and light feedback, which improves the convenience and observability of the test.

[0048] A signal reset circuit connected to the long-time feedback circuit is used to perform a signal reset operation on the long-time feedback circuit.

[0049] The signal reset circuit comprises a reset button and a reset circuit. The reset button sends a reset signal when pressed, and the reset circuit performs a reset operation on the long-time feedback circuit based on the reset signal when receiving the reset signal.

[0050] A reset button and related reset circuit components are set on the PCB board and connected reasonably to ensure that the signal reset function can be realized normally. This makes it convenient for testers to reset the test device for the next test, thus improving the use efficiency of the test device.

[0051] The working power supply circuit is used to supply power to the control loop test device.

[0052] Provide working power for the control loop test device to ensure that all parts of the device can work normally. Its principle is based on the design of the power circuit, which converts and distributes the input power appropriately to provide appropriate voltage and current for different circuit modules.

[0053] Design the working power supply circuit on the PCB board, including power supply chips, capacitors, resistors and other related components, and make reasonable wiring connections to provide a stable working power supply for the device. This ensures the normal operation of the test device and provides the necessary energy support for the normal operation of other circuit modules.

[0054] In summary, this embodiment realizes automatic digital conversion of levels through the AC / DC signal conversion circuit, avoids the cumbersome operation caused by the difference in power supply types and the action delay problem caused by the mechanical structure of the relay, greatly improves the efficiency and accuracy of the test, and effectively ensures the safety and stability of the system through the electromagnetic isolation circuit, preventing the influence of external electromagnetic interference on the internal circuit. Through the long-time feedback circuit, the tester can obtain the test results intuitively, and enhances the visibility and operability of the test process, so as to improve the accuracy and portability of the control loop test device and avoid the action delay caused by the mechanical structure of the relay auxiliary contacts.

[0055] Optionally, the long-time feedback circuit includes: a signal feedback circuit, a buzzer circuit, and an indicator light circuit; the buzzer circuit and the indicator light circuit are respectively connected to the signal feedback circuit;

[0056] A signal feedback circuit, used for sending a long-term feedback signal when receiving a level signal;

[0057] A buzzer circuit is used to give a sound reminder when a feedback signal is received;

[0058] The indicator light circuit is used to provide a light reminder when a feedback signal is received.

[0059] The long-time feedback circuit consists of a signal feedback circuit, a buzzer circuit, and an indicator light circuit. The signal feedback circuit sends a long-time feedback signal after receiving a level signal, which is realized based on the signal processing characteristics of each component in the circuit. The buzzer circuit and the indicator light circuit are respectively connected to the signal feedback circuit. When receiving a feedback signal, the buzzer sounds according to the principle of electromagnetic induction, and the indicator light emits according to the principle of electroluminescence, realizing sound and light reminders.

[0060] Testers can obtain test results intuitively, and sound and light feedback can provide clear instructions in different environments, improving test efficiency and accuracy, and understanding circuit status without complex testing.

[0061] Optionally, the signal reset circuit includes: a reset button and a reset circuit; the reset button is connected to the reset circuit;

[0062] A reset button, for sending a reset signal when pressed;

[0063] The reset circuit is used for performing a reset operation on the long-term feedback circuit based on the reset signal when receiving the reset signal.

[0064] The signal reset circuit includes a reset button and a reset circuit. When the reset button is pressed, the internal contacts of the button are closed or disconnected, changing the circuit connection state and sending a reset signal. After receiving the reset signal, the reset circuit performs a reset operation on the long-time feedback circuit according to the logic of the circuit design and the characteristics of the electronic components to restore its initial state.

[0065] It is convenient for testers to quickly reset the test device to prepare for the next test, save test time, and improve the flexibility and repeatability of the test device.

[0066] Optionally, also include:

[0067] Pointer multimeter, used for current and voltage monitoring of control loop test devices.

[0068] Pointer multimeter is used to monitor the current and voltage of the control loop test device. Its principle is based on the circuit design inside the multimeter. Through the measurement circuit composed of the meter head, resistors, capacitors and other components, the current or voltage signal is converted into the deflection angle of the meter head pointer or digital display, thereby realizing the measurement of current and voltage.

[0069] Properly connect the pointer multimeter to the control loop test device to ensure that the electrical connection between the measuring circuit and the circuit under test is correct, so that the multimeter can accurately obtain the current and voltage information of the test device.

[0070] It can monitor the current and voltage of the test device in real time, provide accurate measurement data for testers, help analyze test results, discover abnormal conditions in the circuit in time, and ensure the accuracy and safety of the test.

[0071] Optionally, also include:

[0072] The voltage and current intelligent detection module is used to detect the input end of the control loop test device, obtain detection data, and generate state detection data based on the detection data.

[0073] The voltage and current intelligent detection module detects the input end of the control loop test device. It uses sensors or other detection elements to sense the voltage and current changes of the input signal, and then processes the detected data through internal circuits and algorithms to obtain detection data, and generates state detection data based on these data to reflect the overall state of the circuit.

[0074] Install the voltage and current intelligent detection module in the control loop test device, ensure that its electrical connection with the input terminal is correct, and perform corresponding settings and debugging so that the module can work normally and accurately obtain and process the detection data.

[0075] It can comprehensively detect the voltage and current of the input signal, provide more detailed circuit status information, help to deeply analyze the performance of the test device, and provide a basis for optimizing the test process and improving the test quality.

[0076] Optionally, also include:

[0077] The data recording and storage module is used to record the monitored current data, voltage data and status detection data.

[0078] The data recording storage module is used to record the monitored current data, voltage data and status detection data. Its principle is to use a storage chip or other storage medium, through the corresponding circuit and control logic, to store the received data in a certain format for subsequent query and analysis.

[0079] A data recording storage module is set up in the control loop test device, and is correctly electrically connected to other related modules to ensure that data can be accurately transmitted to the storage module for storage.

[0080] It can save key data during the test process, making it convenient for testers to review and analyze the data after the test, helping to summarize test experience, discover potential problems, and provide data support for improving test methods and equipment.

[0081] Optionally, also include:

[0082] The remote data transmission module is used to send feedback signals, current data, voltage data, and status detection data to the target terminal.

[0083] The remote data transmission module is used to send feedback signals, current data, voltage data, and status detection data to the target terminal. It uses communication chips or other communication technologies to encode and modulate the data through network connections or other communication methods before sending it out to ensure that the data can be accurately transmitted to the target terminal.

[0084] Install the remote data transmission module in the control loop test device and make correct electrical connections with other related modules. At the same time, configure the corresponding network settings or communication parameters so that the module can work normally and realize remote data transmission.

[0085] It is convenient for testers to obtain test data at remote locations, realize remote monitoring and management of test equipment, and improve the flexibility and convenience of testing. It is especially suitable for some test scenarios that are not convenient for on-site operation or require remote collaboration.

[0086] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0087] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0088] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0089] The above is a detailed introduction to a control loop test device provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A control loop testing device, characterized in that: include: The AC / DC signal conversion circuit is used to automatically convert the input level signal into a digital signal to obtain a digital signal; An electromagnetic isolation circuit connected to the AC / DC signal conversion circuit and used to implement an electromagnetic isolation function for the AC / DC signal conversion circuit; A long-time feedback circuit connected to the electromagnetic isolation circuit and used to respond to the digital signal; A signal reset circuit connected to the long-time feedback circuit and used to perform a signal reset operation on the long-time feedback circuit; The working power supply circuit is used to supply power to the control loop test device.

2. The control loop testing device according to claim 1, characterized in that: The long-time feedback circuit comprises: a signal feedback circuit, a buzzer circuit, and an indicator light circuit; the buzzer circuit and the indicator light circuit are respectively connected to the signal feedback circuit; The signal feedback circuit is used to send a long-term feedback signal when receiving a level signal; The buzzer circuit is used to give a sound reminder when receiving the feedback signal; The indicator light circuit is used to provide a light reminder when the feedback signal is received.

3. The control loop testing device according to claim 2, characterized in that: The signal reset circuit comprises: a reset button and a reset circuit; the reset button is connected to the reset circuit; The reset button is used to send a reset signal when pressed; The reset circuit is used to perform a reset operation on the long-time feedback circuit based on the reset signal when receiving the reset signal.

4. The control loop testing device according to claim 3, characterized in that: Also includes: A pointer-type multimeter is used to monitor the current and voltage of the control loop test device.

5. The control loop testing device according to claim 4, characterized in that: Also includes: The voltage and current intelligent detection module is used to detect the input end of the control loop test device to obtain detection data, and generate state detection data based on the detection data.

6. The control loop testing device according to claim 5, characterized in that: Also includes: The data recording and storage module is used to record the monitored current data, voltage data and the state detection data.

7. The control loop testing device according to claim 6, characterized in that: Also includes: The remote data transmission module is used to send the feedback signal, current data, voltage data, and status detection data to a target terminal.

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