Signal acquisition system

Abstract

The present application relates to a signal acquisition system. The system includes: a signal acquisition module that acquires a voltage signal, transmits the voltage signal to a burnout detection module, generates a digital indication signal based on a comparison result between a voltage corresponding to the voltage signal and a reference voltage, transmits the digital indication signal to a control module, determines a burnout detection result based on the digital indication signal, and uses the voltage signal acquired by the signal acquisition module to perform burnout detection. This eliminates the need for manual inspections of the signal acquisition system, thereby saving manual inspection costs.

Description

Technical Field

[0001] The present application relates to the field of signal acquisition technology, and in particular to a signal acquisition system. Background Art

[0002] With the continuous development of industrial equipment, monitoring of industrial equipment is becoming increasingly important to ensure normal production. In the field of signal acquisition technology, traditional signal acquisition systems lack burnout detection capabilities and can only achieve routine signal acquisition. Once a signal acquisition system burns out, it can cause economic losses and even pose a safety hazard to people. Therefore, workers are required to conduct regular safety inspections of the signal acquisition system, which increases manual inspection costs. Summary of the Invention

[0003] In order to solve the technical problem that the existing signal acquisition system does not have a burnout detection function, the present application provides a signal acquisition system.

[0004] The present application provides a signal acquisition system, comprising:

[0005] A signal acquisition module is used to acquire voltage signals;

[0006] a burnout detection module, electrically connected to the signal acquisition module, for generating a corresponding digital indication signal according to a comparison result between a collected voltage corresponding to the collected voltage signal and a reference voltage;

[0007] The control module is electrically connected to the burnout detection module and is used to determine a corresponding burnout detection result according to the digital indication signal.

[0008] Optionally, the burn detection module includes:

[0009] a protection component, electrically connected to the signal acquisition module, for performing limiting protection processing on the acquired voltage signal and the preset voltage signal to obtain the acquired voltage corresponding to the acquired voltage signal and the reference voltage corresponding to the preset voltage signal;

[0010] The gain processing component is electrically connected to the protection component and the signal acquisition module respectively, and is used to transmit the preset voltage to the protection component through the signal acquisition module, and generate a corresponding digital indication signal according to the comparison result between the reference voltage and the acquisition voltage.

[0011] Optionally, the protection component includes:

[0012] a pull-up circuit, electrically connected to the positive lead terminal of the signal acquisition module, for performing pull-up protection on the collected voltage signal when the collected voltage signal is abnormal, to obtain a bias voltage signal;

[0013] A protection circuit is connected between the signal acquisition module and the gain processing component, and is used to perform current limiting protection processing on the acquired voltage signal and the preset voltage signal, or to perform current limiting protection processing on the bias voltage signal and the preset voltage signal, to obtain the acquired voltage corresponding to the acquired voltage signal or the bias voltage signal and the reference voltage corresponding to the preset voltage.

[0014] Optionally, the pull-up circuit includes a pull-up resistor, a first end of the pull-up resistor is electrically connected to the positive lead end of the signal acquisition module, and a second end of the pull-up resistor is electrically connected to the positive pole of the analog signal source, and is used to pull up the collected voltage signal to the analog signal source to obtain the bias voltage signal when the collected voltage signal is abnormal.

[0015] Optionally, the protection circuit includes:

[0016] a linear circuit, electrically connected to the signal output terminal of the signal acquisition module, configured to perform current limiting protection processing on the preset voltage signal and the acquired voltage signal, or on the preset voltage signal and the bias voltage signal, to obtain a first processed signal corresponding to the acquired voltage signal or the bias voltage signal and a second processed signal corresponding to the preset voltage signal;

[0017] A filter circuit is connected between the linear circuit and the gain processing component, and is used to filter the first processed signal and the second processed signal to obtain the collection voltage and the reference voltage.

[0018] Optionally, the linear circuit includes a first linear resistor and a second linear resistor, the first end of the first linear resistor is electrically connected to the first output end of the signal acquisition module, the second end of the first linear resistor is electrically connected to the filter circuit, the first end of the second linear resistor is electrically connected to the second output end of the signal acquisition module, and the second end of the second linear resistor is electrically connected to the filter circuit.

[0019] Optionally, the filtering circuit includes a first capacitor, a second capacitor and a third capacitor, the first end of the first capacitor is electrically connected to the second end of the first linear resistor, the first end of the second capacitor, and the first input end of the gain processing component, the second end of the first capacitor is electrically connected to the second end of the second linear resistor, the second end of the third capacitor, and the second input end of the gain processing component, and the second end of the second capacitor is electrically connected to the first end of the third capacitor and is grounded.

[0020] Optionally, the gain processing component includes:

[0021] a multiplexer, wherein a multiplexing pin of the multiplexer is electrically connected to the negative lead terminal of the signal acquisition module, a first input pin of the multiplexer is electrically connected to the first end of the second capacitor, and a second input pin of the multiplexer is electrically connected to the second end of the third capacitor, and is configured to generate an output signal based on a comparison result between the reference voltage and the collected voltage;

[0022] The gain processing circuit is electrically connected to the output end of the multiplexer and is used to perform gain attenuation processing on the output signal to obtain a corresponding digital indication signal.

[0023] Optionally, the gain processing circuit includes:

[0024] a gain amplifier electrically connected to the output end of the multiplexer, and configured to perform gain attenuation processing on the output signal to obtain a processed signal corresponding to the output signal;

[0025] An analog-to-digital converter is electrically connected to the output end of the gain amplifier chip and is used to perform analog-to-digital conversion on the processed signal to obtain the digital indication signal corresponding to the processed signal.

[0026] Optionally, the control module generates a burnout detection result indicating burnout when the digital indication signal is a first preset value; and generates a burnout detection result indicating non-burnout when the digital indication signal is a second preset value.

[0027] Based on the above-mentioned signal acquisition system, a collected voltage signal is obtained through the signal acquisition module and transmitted to the burnout detection module. According to the comparison result between the collected voltage corresponding to the collected voltage signal and the reference voltage, a corresponding digital indication signal is generated and transmitted to the control module. The control module determines the corresponding burnout detection result according to the digital indication signal and uses the collected voltage signal collected by the signal acquisition module to perform burnout detection judgment. There is no need to perform burnout detection on the signal acquisition system through manual inspection, thereby saving manual inspection costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 is a structural block diagram of a signal acquisition system in one embodiment;

[0031] Figure 2 is a structural block diagram of a signal acquisition system in one embodiment;

[0032] Figure 3 is a structural block diagram of a signal acquisition system in one embodiment;

[0033] Figure 4 is a structural block diagram of a signal acquisition system in one embodiment;

[0034] Figure 5 FIG. 4 is a structural block diagram of a signal acquisition system in one embodiment. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In one embodiment, Figure 1 A flow chart of a signal acquisition system in one embodiment is shown in FIG. Figure 1 , provides a signal acquisition system. The signal acquisition system specifically includes:

[0037] The signal acquisition module 110 is used to acquire a voltage signal.

[0038] Specifically, the signal acquisition module 110 can be any component or integrated circuit that can realize temperature detection, such as a thermocouple, a thermistor, a temperature sensor, etc. In this embodiment, a thermocouple is selected as the signal acquisition module 110, and the collected voltage signal corresponding to the ambient temperature of the signal acquisition system is collected by the thermocouple. When there is no burning phenomenon, the collected voltage signal is an analog signal indicating the collected temperature; when there is a burning phenomenon, the collected voltage signal is an indication.

[0039] The burnout detection module 120 is electrically connected to the signal acquisition module 110 and is configured to generate a corresponding digital indication signal according to a comparison result between a collected voltage corresponding to the collected voltage signal and a reference voltage.

[0040] Specifically, the burn detection module 120 receives a sampled voltage signal from the thermocouple, converts the sampled voltage signal to a sampled voltage, and compares the sampled voltage to a reference voltage. The reference voltage is used to indicate a preset temperature range within which a burnout phenomenon occurs. The reference voltage can be customized based on the ignition points of different components in the signal acquisition system. If the sampled voltage is greater than or equal to the reference voltage, a burnout phenomenon has occurred, and a digital indication signal indicating a burnout phenomenon is generated. If the sampled voltage is less than the reference voltage, a burnout phenomenon has not occurred, and a digital indication signal indicating a non-burnout phenomenon is generated. The digital indication signal indicating a burnout phenomenon and the digital indication signal indicating a non-burnout phenomenon correspond to different numerical values. If the digital indication signal indicates a non-burnout phenomenon, the numerical value corresponding to the digital indication signal is the sampled temperature value.

[0041] The control module 130 is electrically connected to the burnout detection module 120 and is configured to determine a corresponding burnout detection result according to the digital indication signal.

[0042] Specifically, control module 130 can be any device or integrated circuit with control functionality, such as an MCU (Microcontroller Unit), a combinational logic controller, or a CPU (Central Processing Unit). In this embodiment, an MCU is selected as control module 130. Control module 130 obtains a digital indication signal from burn detection module 120 and determines a burn detection result based on the corresponding value of the digital indication signal. If the burn detection result is not burnt, the corresponding value of the digital indication signal is also displayed on a display as the collected temperature value. The larger the corresponding value of the digital indication signal, the higher the collected temperature. Using the collected voltage signal collected by signal acquisition module 110 to determine burn detection eliminates the need for manual inspections of the signal acquisition system, thereby saving manual inspection costs.

[0043] The control module 130 can also initiate a burnout alarm when the burnout detection result is burnout. The burnout alarm methods include flashing lights and whistle prompts, voice broadcasts, email prompts, text message prompts, telephone prompts, video prompts, etc., and the burnout alarm information can also be displayed on the display to remind the user in various ways that components in the signal acquisition system have burned out, and corresponding remedial measures need to be taken in time to avoid further deterioration of the burnout phenomenon and causing more serious losses.

[0044] In one embodiment, Figure 2 As shown, the burn detection module 120 includes:

[0045] The protection component 121 is electrically connected to the signal acquisition module 110 and is used to perform limiting protection processing on the acquired voltage signal and the preset voltage signal to obtain the acquired voltage corresponding to the acquired voltage signal and the reference voltage corresponding to the preset voltage signal;

[0046] The gain processing component 122 is electrically connected to the protection component 121 and the signal acquisition module 110, respectively, and is used to transmit the preset voltage to the protection component 121 through the signal acquisition module 110, and generate a corresponding digital indication signal according to the comparison result between the reference voltage and the acquisition voltage.

[0047] Specifically, the limiting protection processing includes current limiting protection, electrostatic protection and reducing signal reflection. The protection component 121 can be specifically composed of integrated circuits corresponding to multiple protection functions. The protection component 121 obtains the collected voltage signal and the preset voltage from the signal acquisition module 110. Since there may be other interference signals in the voltage signal, in order to improve the accuracy of the collected signal, the protection component 121 performs anti-interference processing on the collected voltage signal and the preset voltage signal, thereby avoiding signal overshoot and signal reflection during the transmission process of the voltage signal.

[0048] Gain processing component 122 can be a chip, device, or integrated circuit with gain attenuation functionality. The chip can be an AD chip. Gain processing component 122 is also connected to the positive terminal (AVDD) and the negative terminal (AVSS) of the analog signal source. Gain processing component 122 transmits an internal preset voltage signal to signal acquisition module 110 via transmission line (AIN2) to provide a reference voltage for signal acquisition module 110. This eliminates the need for additional components outside gain processing component 122 to provide a reference voltage. This reduces the risk of additional interference introduced by the reference voltage through additional components, improves signal acquisition accuracy, and avoids the impact of temperature drift of additional components and noise from additional leads on the acquired signal. The reference voltage is denoted as VBIAS. The reference voltage can be customized based on burnout detection requirements. In this embodiment, the reference voltage is set to (AVDD - AVSS) / 2, thereby setting the reference voltage to the intermediate power supply voltage, thereby controlling the acquisition voltage within a reasonable range.

[0049] In one embodiment, Figure 3 As shown, the protection component 121 includes:

[0050] The pull-up circuit 1211 is electrically connected to the positive lead terminal of the signal acquisition module 110 and is used to pull up the collected voltage signal to obtain a bias voltage signal when the collected voltage signal is abnormal.

[0051] The protection circuit 1212 is connected between the signal acquisition module 110 and the gain processing component 122, and is used to perform current limiting protection processing on the acquired voltage signal and the preset voltage signal, or perform current limiting protection processing on the bias voltage signal and the preset voltage signal, to obtain the acquired voltage corresponding to the acquired voltage signal or the bias voltage signal and the reference voltage corresponding to the preset voltage.

[0052] Specifically, the pull-up circuit 1211 is used to provide pull-up protection for the collected voltage signal. When the collected voltage signal indicates that the thermocouple is burned out or the circuit is open, the pull-up circuit 1211 performs pull-up protection to provide a bias voltage signal for the burn-out detection module 120. The bias voltage signal is used to pull up the collected voltage to the analog signal source voltage, thereby providing a larger collected voltage to characterize the burn-out or open-circuit phenomenon.

[0053] The protection circuit 1212 is used to perform current limiting protection on the collected voltage signal and the preset voltage signal when the collected voltage signal is normal; when the collected voltage signal is abnormal, the preset voltage signal and the bias voltage signal obtained after pull-up processing are current limited to obtain the processed collected voltage and reference voltage, that is, the collected voltage is the voltage of the collected voltage signal or the bias voltage signal after protection processing. The protection circuit 1212 avoids overcurrent events during signal transmission, reduces signal reflections, and prevents signal overshoot, thereby providing a higher-precision voltage for the gain processing component 122.

[0054] In one embodiment, Figure 4 As shown, the pull-up circuit 1211 includes a pull-up resistor, a first end of the pull-up resistor is electrically connected to the positive lead end of the signal acquisition module 110, and a second end of the pull-up resistor is electrically connected to the positive electrode of the analog signal source, and is used to pull up the collected voltage signal to the analog signal source to obtain the bias voltage signal when the collected voltage signal is abnormal.

[0055] Specifically, when the collected voltage signal is normal, a first bias current will be generated when the voltage signal flows through the pull-up resistor, and a second bias current will be generated when the reference voltage passes through the thermocouple. The first bias current and the second bias current constitute a bias current. The bias current will flow through the thermocouple to the protection circuit 1212 to generate an additional voltage drop to form an error voltage, that is, the error voltage will have an adverse effect on the accuracy of the collected voltage. In order to reduce the error voltage, the bias current needs to be reduced, that is, a larger pull-up resistor is required. Therefore, the resistance of the pull-up resistor is usually set at 500kΩ to 10MΩ to reduce the error voltage.

[0056] When the collected voltage signal is abnormal, it indicates that the thermocouple is burned out or open-circuited. The pull-up resistor will pull the collected voltage signal up to the analog signal source, which is recorded as AVDD. That is, the pull-up resistor will pull the collected voltage up to AVDD. When the collected voltage is subsequently compared with the reference voltage, it can be clearly seen that the collected voltage is greater than the reference voltage, thereby informing the controller that the thermocouple is burned out or open-circuited.

[0057] In one embodiment, the protection circuit 1212 includes:

[0058] a linear circuit, electrically connected to the signal output terminal of the signal acquisition module 110, configured to perform current limiting protection processing on the preset voltage signal and the acquired voltage signal, or on the preset voltage signal and the bias voltage signal, to obtain a first processed signal corresponding to the acquired voltage signal or the bias voltage signal and a second processed signal corresponding to the preset voltage signal;

[0059] A filtering circuit is connected between the linear circuit and the gain processing component 122, and is used to filter the first processed signal and the second processed signal to obtain the sampling voltage and the reference voltage.

[0060] Specifically, the linear circuit is used to perform current limiting protection processing on the collected voltage signal and the preset voltage signal when the collected voltage signal is normal; when the collected voltage signal is abnormal, the linear circuit is used to perform current limiting protection processing on the preset voltage signal and the bias voltage signal after bias processing, so as to obtain a first processed signal corresponding to the collected voltage signal or the bias voltage signal, and a second processed signal corresponding to the preset voltage signal, that is, the first processed signal and the second processed signal are signals obtained after electrostatic protection and signal reflection reduction, and have higher accuracy than the signals before processing.

[0061] The filtering circuit is used to filter the first processed signal and the second processed signal to further remove noise or useless signals from the signals, ultimately obtaining a clean and effective acquisition voltage corresponding to the first processed signal and a reference voltage corresponding to the second processed signal. The above processing flow performs the same processing on the acquisition voltage signal and the preset voltage signal to improve the comparison accuracy between the acquisition voltage and the reference voltage.

[0062] In one embodiment, Figure 5 As shown, the linear circuit includes a first linear resistor and a second linear resistor, the first end of the first linear resistor is electrically connected to the first output end of the signal acquisition module 110, the second end of the first linear resistor is electrically connected to the filter circuit, the first end of the second linear resistor is electrically connected to the second output end of the signal acquisition module 110, and the second end of the second linear resistor is electrically connected to the filter circuit.

[0063] Specifically, such as Figure 5 As shown, the first linear resistor is R2, the second linear resistor is R3, the first linear resistor is connected to the transmission line (AIN0) for transmitting the collected voltage signal or the bias voltage signal, and the second linear resistor is connected to the transmission line (AIN1) for transmitting the preset voltage signal. In order to ensure that the processing flow of the collected voltage signal and the preset voltage signal is consistent, the first linear resistor and the second linear resistor are resistors of the same model and the same resistance value. The collected voltage signal or the bias voltage signal is current-limited by the first linear resistor, and the preset voltage signal is current-limited by the second linear resistor, and the signal after current-limiting processing is transmitted to the filter circuit for filtering processing.

[0064] In one embodiment, the filtering circuit includes a first capacitor, a second capacitor and a third capacitor, the first end of the first capacitor is electrically connected to the second end of the first linear resistor, the first end of the second capacitor, and the first input end of the gain processing component 122, the second end of the first capacitor is electrically connected to the second end of the second linear resistor, the second end of the third capacitor, and the second input end of the gain processing component 122, and the second end of the second capacitor is electrically connected to the first end of the third capacitor and is grounded.

[0065] Specifically, refer to Figure 5 As shown, the first capacitor is C1, the second capacitor is C2, and the third capacitor is C3, that is, the second capacitor and the third capacitor are connected in series and then in parallel with the first capacitor, and the filtering circuit is connected between the two transmission lines to filter the collected voltage signal or the bias voltage signal, and also to filter the preset voltage signal.

[0066] In one embodiment, the gain processing component 122 includes:

[0067] a multiplexer, wherein a multiplexing pin of the multiplexer is electrically connected to the negative lead terminal of the signal acquisition module 110, a first input pin of the multiplexer is electrically connected to the first end of the second capacitor, and a second input pin of the multiplexer is electrically connected to the second end of the third capacitor, and is configured to generate an output signal based on a comparison result between the reference voltage and the collected voltage;

[0068] The gain processing circuit is electrically connected to the output end of the multiplexer and is used to perform gain attenuation processing on the output signal to obtain a corresponding digital indication signal.

[0069] Specifically, the multiplexer is denoted as MUX. The multiplexing pin of the multiplexer is used to provide a preset voltage signal of the built-in voltage source to the negative lead end of the thermocouple, and the input pin of the multiplexer is also used to receive the processed collected voltage and reference voltage, and generate an output signal after comparing the collected voltage and the reference voltage. The output signal is used to indicate the comparison result, which includes the collected voltage being greater than or equal to the reference voltage and the collected voltage being less than the reference voltage. Different comparison results correspond to different burn detection results.

[0070] The gain processing circuit performs gain processing or attenuation processing on the output signal to obtain a final digital indication signal.

[0071] In one embodiment, the gain processing circuit includes:

[0072] a gain amplifier electrically connected to the output end of the multiplexer, and configured to perform gain attenuation processing on the output signal to obtain a processed signal corresponding to the output signal;

[0073] An analog-to-digital converter is electrically connected to the output end of the gain amplifier chip and is used to perform analog-to-digital conversion on the processed signal to obtain the digital indication signal corresponding to the processed signal.

[0074] Specifically, such as Figure 5 As shown, the gain amplifier is denoted as PGA. The gain amplifier performs gain processing or attenuation processing on the output signal. Specifically, the output signal is compared with a preset signal range. When the output signal is greater than the preset signal range, the output signal is attenuated; when the output signal is less than the preset signal range, the output signal is gain processed. Whether it is attenuation processing or gain processing, it is to control the output signal within the preset signal range to obtain a processed signal after gain attenuation processing.

[0075] The analog-to-digital converter is abbreviated as ADC. The processed signal is an analog signal, which is converted into a digital indication signal by the ADC. When the ADC performs analog-to-digital conversion on the processed signal, it receives different signals. In order to accurately perform analog-to-digital conversion on the processed signal, the bias current received by the ADC needs to be significantly greater than the input current, so that only the processed signal corresponding to the input current is converted into a digital signal. If the input current is close to the bias current, the ADC may mistakenly convert the transmission signal corresponding to the bias current into a digital signal. As a result, the obtained digital indication signal is not converted from the processed signal and cannot accurately represent the burn-out detection status. Therefore, when selecting a pull-up resistor, it is necessary to comprehensively consider the signal conversion requirements of the ADC and the tolerance for error voltage.

[0076] The value corresponding to the digital indication signal is used to indicate the burnout condition or collect temperature, and the value corresponding to the digital indication signal is stored in the register of the gain processing component 122. The control module 130 obtains the value corresponding to the digital indication signal by accessing the register to determine the burnout detection result.

[0077] In one embodiment, the control module 130 generates a burnout detection result indicating burnout when the digital indication signal is a first preset value, and generates a non-burnout detection result when the digital indication signal is a second preset value.

[0078] Specifically, the number of digits corresponding to the digital indication signal is related to the counting system supported by the analog-to-digital converter. The counting system can be binary, quaternary, hexadecimal or octal, etc. For example, if the analog-to-digital converter is a 16-bit bipolar converter, the full-scale reading corresponding to the analog-to-digital converter is 7FFFh, and the first preset value and the second preset value are any different values less than or equal to the full-scale reading. In this embodiment, the first preset value is equal to the full-scale reading, that is, when the first preset value is 7FFFh, it indicates that a burn-in phenomenon exists, and a burn-in detection result of burnt is generated; when the second preset value is any value other than 7FFFh, it indicates that no burn-in phenomenon exists, and a burn-in detection result of not burnt is generated.

[0079] For example, different AD chips correspond to different analog signal sources, and corresponding reference voltages are set according to different analog signal sources, ensuring that the bias current is not too high to generate a large error voltage, nor too small to affect the conversion result of the analog-to-digital converter for the signal, and setting a fully open range range based on the full-scale reading of the analog-to-digital converter, thereby expanding the reading range (for example, a 16-bit bipolar analog-to-digital converter has a full-scale reading range of 0 to 7fffh). When the temperature collected by the thermocouple is greater than the preset temperature range, the voltage on the AIN0 and AIN1 transmission lines will exceed the reference voltage, and the analog-to-digital converter will generate a digital indication signal with a reading of 7FFFh (taking a 16-bit bipolar ADC as an example). This value is stored in the register inside the AD chip. The controller MCU accesses and reads the value stored in the register inside the AD chip through SPI communication. When the controller MCU determines that the digital indication signal corresponds to a value indicating that the thermocouple has burned out, it outputs a burn detection result 1. This high-level signal can be transmitted to a device such as a buzzer or LED as an alarm information to indicate the presence of a burn phenomenon, or a fault information is sent to the host computer to display the full-scale reading to indicate that the thermocouple has burned out. When no burning occurs, the measured temperature value is displayed on the host computer.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, system, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, system, article or device. In the absence of further restrictions, an element defined by the sentence "including a..." does not exclude the presence of other identical elements in the process, system, article or device that includes the element.

[0081] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A signal acquisition system, characterized in that: The signal acquisition system comprises: A signal acquisition module is used to acquire voltage signals; a burnout detection module, electrically connected to the signal acquisition module, for generating a corresponding digital indication signal based on a comparison result between a collected voltage corresponding to the collected voltage signal and a reference voltage, wherein the digital indication signal indicating burnout and the digital indication signal indicating non-burnout have different values; a control module, electrically connected to the burnout detection module, and configured to determine a corresponding burnout detection result according to the digital indication signal; The burn detection module includes: a protection component, electrically connected to the signal acquisition module, for performing limiting protection processing on the acquired voltage signal and the preset voltage signal to obtain the acquired voltage corresponding to the acquired voltage signal and the reference voltage corresponding to the preset voltage signal; A gain processing component is electrically connected to the protection component and the signal acquisition module, respectively. The gain processing component is also connected to the positive pole of the analog signal source and the negative pole of the analog signal source, respectively, and is used to transmit the internal preset voltage signal to the signal acquisition module, and transmit the preset voltage signal to the protection component through the signal acquisition module, and generate a corresponding digital indication signal based on the comparison result between the reference voltage and the acquisition voltage, wherein the reference voltage is half of the voltage difference between the voltage corresponding to the positive pole of the analog signal source and the voltage corresponding to the negative pole of the analog signal source.

2. The signal acquisition system according to claim 1, characterized in that: The protection component includes: a pull-up circuit, electrically connected to the positive lead terminal of the signal acquisition module, for performing pull-up protection on the collected voltage signal when the collected voltage signal is abnormal, to obtain a bias voltage signal; A protection circuit is connected between the signal acquisition module and the gain processing component, and is used to perform current limiting protection processing on the acquired voltage signal and the preset voltage signal, or to perform current limiting protection processing on the bias voltage signal and the preset voltage signal, to obtain the acquired voltage corresponding to the acquired voltage signal or the bias voltage signal and the reference voltage corresponding to the preset voltage.

3. The signal acquisition system according to claim 2, characterized in that: The pull-up circuit includes a pull-up resistor, a first end of the pull-up resistor is electrically connected to the positive lead end of the signal acquisition module, and a second end of the pull-up resistor is electrically connected to the positive electrode of the analog signal source. When the collected voltage signal is abnormal, the collected voltage signal is pulled up to the analog signal source to obtain the bias voltage signal.

4. The signal acquisition system according to claim 2, characterized in that: The protection circuit comprises: a linear circuit, electrically connected to the signal output terminal of the signal acquisition module, configured to perform current limiting protection processing on the preset voltage signal and the acquired voltage signal, or on the preset voltage signal and the bias voltage signal, to obtain a first processed signal corresponding to the acquired voltage signal or the bias voltage signal and a second processed signal corresponding to the preset voltage signal; A filter circuit is connected between the linear circuit and the gain processing component, and is used to filter the first processed signal and the second processed signal to obtain the collection voltage and the reference voltage.

5. The signal acquisition system according to claim 4, characterized in that: The linear circuit includes a first linear resistor and a second linear resistor, the first end of the first linear resistor is electrically connected to the first output end of the signal acquisition module, the second end of the first linear resistor is electrically connected to the filter circuit, the first end of the second linear resistor is electrically connected to the second output end of the signal acquisition module, and the second end of the second linear resistor is electrically connected to the filter circuit.

6. The signal acquisition system according to claim 5, characterized in that: The filtering circuit includes a first capacitor, a second capacitor and a third capacitor. The first end of the first capacitor is electrically connected to the second end of the first linear resistor, the first end of the second capacitor, and the first input end of the gain processing component. The second end of the first capacitor is electrically connected to the second end of the second linear resistor, the second end of the third capacitor, and the second input end of the gain processing component. The second end of the second capacitor is electrically connected to the first end of the third capacitor and is grounded.

7. The signal acquisition system according to claim 6, characterized in that: The gain processing component includes: a multiplexer, wherein a multiplexing pin of the multiplexer is electrically connected to the negative lead terminal of the signal acquisition module, a first input pin of the multiplexer is electrically connected to the first end of the second capacitor, and a second input pin of the multiplexer is electrically connected to the second end of the third capacitor, and is configured to generate an output signal based on a comparison result between the reference voltage and the collected voltage; The gain processing circuit is electrically connected to the output end of the multiplexer and is used to perform gain attenuation processing on the output signal to obtain a corresponding digital indication signal.

8. The signal acquisition system according to claim 7, characterized in that: The gain processing circuit comprises: a gain amplifier electrically connected to the output end of the multiplexer, and configured to perform gain attenuation processing on the output signal to obtain a processed signal corresponding to the output signal; An analog-to-digital converter is electrically connected to the output end of the gain amplifier and is used to perform analog-to-digital conversion on the processed signal to obtain the digital indication signal corresponding to the processed signal.

9. The signal acquisition system according to claim 8, characterized in that: The control module generates a burnout detection result indicating burnout when the digital indication signal is a first preset value, and generates a burnout detection result indicating non-burnout when the digital indication signal is a second preset value.

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