A detection instrument for a comprehensive detector

Abstract

The present disclosure provides a detection instrument of a comprehensive detector, comprising: a control unit and an analog acquisition unit, a digital output unit and a communication detection unit connected between the control unit and the detector; the analog acquisition unit is used for acquiring at least one detection signal collected by the detector and sending to the control unit; the digital output unit is used for converting the enable signal output by the control unit into a digital signal and sending to the detector; the communication detection unit is used for acquiring the communication data sent by the detector under the control of the control unit; the control unit is used for judging whether the corresponding function of the detector is normal according to the detection signal and / or the communication data. The present disclosure realizes the detection of the detection signal and the communication data output by the detector by using the detection instrument integrated with the analog acquisition unit, the digital output unit, the communication detection unit and the control unit, realizes the comprehensive detection of various indexes and performance parameters of the comprehensive detector, and helps the operator to realize the detection and fault positioning of the detector function.

Description

Technical Field

[0001] This disclosure relates to the field of equipment testing technology, and in particular to a testing instrument for an integrated detector. Background Technology

[0002] This type of equipment's integrated detector functions as a detection and alarm device, collecting data on the air pressure difference between the inside and outside of the vehicle, the content of toxic gases and radiation in the external environment. Because this data collection and alarm equipment operates in harsh environments, a malfunction in the detector would compromise the safety of the operators. Furthermore, pinpointing the problem area after a malfunction is crucial for its repair; therefore, developing a functional testing method for the detector is an urgent issue that needs to be addressed. Utility Model Content

[0003] The purpose of this disclosure is to provide a detection instrument for a comprehensive detector to solve the problems existing in the prior art.

[0004] The embodiments of this disclosure adopt the following technical solution: a detection instrument for a comprehensive detector, comprising at least: a control unit and an analog acquisition unit, a digital output unit, and a communication detection unit connected between the control unit and the detector; wherein, the analog acquisition unit is configured to acquire at least one detection signal acquired by the detector and send it to the control unit; the digital output unit is configured to convert an enable signal output by the control unit into a digital signal and send the digital signal to the detector, so that the detector performs detection of a corresponding type of signal according to the digital signal; the communication detection unit is configured to acquire communication data sent by the detector under the control of the control unit; the control unit is configured to determine whether the corresponding function of the detector is normal based on the detection signal and / or the communication data.

[0005] The beneficial effects of this disclosure are as follows: by using a detection instrument that integrates an analog acquisition unit, a digital output unit, a communication detection unit, and a control unit, the detection signal and communication data output by the detector can be detected, and the comprehensive detection of various indicators and performance parameters of the detector can be achieved, helping operators to quickly detect the detector's functions and locate faults. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the detection instrument in this embodiment;

[0008] Figure 2 This is a circuit diagram of the voltage divider protection circuit in this embodiment;

[0009] Figure 3 This is a circuit diagram of the digital-to-analog converter circuit in this embodiment;

[0010] Figure 4 This is a circuit diagram of the communication detection unit in this embodiment;

[0011] Figure 5 This is a circuit diagram of the first power supply circuit in this embodiment;

[0012] Figure 6 This is a circuit diagram of the second power supply circuit in this embodiment. Detailed Implementation

[0013] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0014] This type of equipment's integrated detector functions as a detection and alarm device, collecting data on the air pressure difference between the inside and outside of the vehicle, the content of toxic gases and radiation in the external environment. Because this data collection and alarm equipment operates in harsh environments, a malfunction in the detector would compromise the safety of the operators. Furthermore, pinpointing the problem area after a malfunction is crucial for its repair; therefore, developing a functional testing method for the detector is an urgent issue that needs to be addressed.

[0015] To address the aforementioned issues, this disclosure provides a testing instrument for a comprehensive detector, used to detect detector functions and locate faults. Figure 1 The diagram shows the structure of the detection instrument 100 in this embodiment of the present disclosure. It mainly includes a control unit 10 and an analog acquisition unit 20, a digital output unit 30 and a communication detection unit 40 connected between the control unit 10 and the detector 200, so as to acquire the output signal of the detector 200 and determine whether the corresponding function of the detector 200 is normal.

[0016] In this embodiment, the detector 200 is mainly used to detect environmental parameters, including but not limited to air pressure, radiation, and harmful gas content. Specifically, it senses these environmental parameters through various sensors and outputs detection signals representing each parameter. The analog acquisition unit 20 in this embodiment is configured to acquire at least one detection signal collected by the detector 200 and send it to the control unit 10. Normally, the detection signal is an analog signal, and the control unit 10 is a microcontroller with an analog-to-digital conversion module. However, since the detection signals output by the detector 200 are of different types, to fully ensure the safety and reliability of the detection instrument, the analog acquisition unit 20 preprocesses the detection signal before the control unit 10 performs analog-to-digital conversion.

[0017] Specifically, the analog acquisition unit 20 includes at least one voltage divider protection circuit, each voltage divider protection circuit being connected to the output terminal of one of the detection signals of the detector 200, for preprocessing different types of detection signals. Figure 2 The circuit diagram of the voltage divider protection circuit is shown, specifically including: a first voltage divider resistor RD1, a second voltage divider resistor RD2, a filter capacitor C1, and a transient voltage suppression (TVS) diode D1. One end of the first voltage divider resistor RD1 serves as the input terminal IN of the analog acquisition unit 20 and is connected to one of the detection signal output terminals of the detector 200. The other end of the first voltage divider resistor RD1 is simultaneously connected to the first plate of the filter capacitor C1, one end of the second voltage divider resistor RD2, and the negative terminal of the TVS diode. The second plate of the filter capacitor C1, the other end of the second voltage divider resistor RD2, and the positive terminal of the TVS diode are grounded. The positive terminal of the TVS diode is led out to the output terminal of the analog acquisition unit 20 and connected to the analog-to-digital conversion input terminal IN+ of the control unit 10. It should be noted that... Figure 2 The circuit diagram of only one of the voltage divider protection circuits is shown. The actual number of voltage divider protection circuits should be the same as the number of types of detection signals. That is, each voltage divider protection circuit is used to implement voltage divider preprocessing of a detection signal, and the acquisition channel is connected in parallel with a TVS tube and a filter capacitor to effectively prevent high-level signal impact and high-frequency noise from damaging the control unit 10.

[0018] In actual testing, when the detection instrument 100 sends an enable signal to instruct the detector 200 to acquire and output any one or more detection signals, the digital output unit 30 is mainly configured to convert the enable signal output by the control unit 10 into a digital signal and send the digital signal to the detector 200, so that the detector 200 can perform detection of the corresponding type of signal based on the digital signal. Specifically, the digital output unit 30 mainly includes a digital-to-analog converter circuit. Figure 3The circuit diagram of the digital-to-analog converter circuit is shown. It mainly includes an optocoupler isolation chip U9 and first to fourth protection resistors R50 to R56. One end of each of the first, second, third, and fourth protection resistors R56 is connected to a first operating voltage of 3.3V. The other ends of the first to fourth protection resistors R50 to R56 are respectively connected to the first, third, fifth, and seventh pins of the optocoupler isolation chip U9. The second, fourth, sixth, and eighth pins of the optocoupler isolation chip U9 are respectively connected to the enable terminals IO8 to IO5 of the control unit 10. The ninth, eleventh, thirteenth, and fifteenth pins of the optocoupler isolation chip U9 are respectively connected to the enable signal input terminals con1 to con4 of the detector 200. The tenth, twelfth, fourteenth, and sixteenth pins of the optocoupler isolation chip U9 are all connected to a second operating voltage of 5V. Figure 3 The optocoupler isolation chip U9 shown includes four independent optocoupler switches. The control unit 10 can control the opening state of the four optocoupler channels by outputting enable signals of different magnitudes to achieve 4-bit digital signal output. When the detector 200 receives the digital signal, it determines the type of detection signal that the control unit 10 wants to detect based on the high and low level of each channel, and drives the corresponding sensor to sense it. The generated detection signal is transmitted to the control unit 10 through the analog acquisition unit 20.

[0019] In some embodiments, there may be two digital-to-analog conversion circuits, one of which is used as the primary circuit and the other as a backup circuit.

[0020] When the detector 200 senses external environmental parameters, it sends communication data to the host computer it communicates with after collecting all environmental parameters, indicating that the detection is complete or issuing a warning. In this embodiment, the detection instrument 100 detects the communication function of the detector 200 through the communication detection unit 40, which is specifically configured to acquire the communication data sent by the detector 200 under the control of the control unit 10. Figure 4 The circuit diagram of the communication detection unit 40 is shown, which includes at least a serial communication chip U6, such as the SP3232EEN serial communication chip. Pins 9 to 11 are connected to the control unit 10 to receive control from the control unit 10 to switch modes to receive mode. Pins 7, 8, 13, and 14 are connected to the output terminals of the detector's communication data. Other electronic components and their connections in conjunction with the serial communication chip U6 are shown below. Figure 4 As shown, these are all conventional designs implemented in conjunction with serial communication functions, and will not be described in detail in this embodiment.

[0021] In some embodiments, the detection instrument 100 further includes a DC power supply unit 50 for powering itself and the detector 200. Specifically, the DC power supply unit 50 in this embodiment includes at least a first power supply circuit and a second power supply circuit, wherein the first power supply circuit is used to power itself and the second power supply circuit is used to power the detector 200 so as to enable the detector 200 to detect anytime and anywhere.

[0022] Figure 5 The circuit diagram of the first power supply circuit is shown, which includes at least: a first power supply chip U3, a first capacitor to a seventh capacitor, a first inductor L3, and a first resistor to a third resistor. The second pin of the first power supply chip U3, one end of the first resistor R6, and the first plates of the first capacitors to the third capacitors (C11, C25, C3) are all connected to a first power supply voltage of 12V. The other end of the first resistor R6 is connected to the seventh pin of the first power supply chip U3. The fourth and ninth pins of the first power supply chip U3, and the first plates of the first capacitors C11 to the sixth capacitor are also connected. Both plates are grounded. The first pin of the first power supply chip U3 is connected to the first plate of the seventh capacitor C7. The second plate of the seventh capacitor C7 and the third pin of the first power supply chip U3 are connected to one end of the first inductor L3. The fifth pin of the first power supply chip U3 is connected to the other end of the first inductor L3 through the third resistor R7, and leads out the 5V output terminal of the first power supply circuit. The second resistor R10 is connected in series between the fifth pin and the ground terminal. The first plates of the fourth to sixth capacitors (C2, C9, C10) are all connected to the 5V output terminal of the first power supply circuit.

[0023] Figure 6The circuit diagram of the second power supply circuit is shown, which includes at least: a second power supply chip U4, capacitors eight to thirteen, a second inductor L4, resistors four to six, a fuse F1, a first diode D6, and a second diode D7. The fifth pin of the second power supply chip U4 and the first plates of capacitors eight to ten (C16, C17, C18) are connected to the second power supply voltage of 24V. The first pin of the second power supply chip U4 and the second plates of capacitors eight and nine (C16, C17) are grounded. The second plate of capacitor ten C18 is connected to the fourth pin of the second power supply chip U4. The third and sixth pins of the second power supply chip U4 are connected and then connected to one end of the second inductor L4. The cathode of the first diode D6 is connected to one end of the second inductor L4, and the cathode of the first diode D6 is grounded. The second pin of the second power supply chip U4 is connected to the second diode D7. The negative terminal of diode 7 is connected, the positive terminal of the second diode D7 is connected to the power supply control terminal FB1 of the control unit, the other end of the second inductor L4 is connected to the first plate of the eleventh to thirteenth capacitors (C21, C20, C19), the second plates of the eleventh and twelfth capacitors (C21, C20) are grounded, one end of the fourth resistor R27 is connected to the second pin of the second power supply chip U4, the other end of the fourth resistor R27 is connected to one end of the fifth resistor R28, the other end of the fifth resistor R28 is grounded, one end of the sixth resistor R23 is connected to the first plate of the twelfth capacitor C20, the other end of the sixth resistor R23 is connected to the other end of the fourth resistor R27, the second plate of the thirteenth capacitor C19 is connected to one end of the fifth resistor, the first plate of the thirteenth capacitor C19 is also connected to one end of the fuse F1, the other end of the fuse F1 leads out to the 20V output terminal of the second power supply circuit. In actual use, when the control unit FB1 outputs a high level, the output terminal of the second power supply circuit outputs a 20V working voltage to power the detector. If FB1 outputs a low level, it does not power the detector.

[0024] In practical use, the control unit 10 determines whether the detector's corresponding functions are normal based on the detection signals and communication data transmitted from the analog acquisition unit 20 and the communication detection unit 40. For example, if the control unit instructs the detector to perform barometric pressure and radiation detection via an enable signal, but only receives a radiation detection signal, it indicates a malfunction in the detector's barometric pressure detection function. If no communication data is received when the detector completes the detection, it indicates a failure in the detector's communication function. Furthermore, the detection instrument 100 may also include a display unit connected to the control unit to display the detection signals and / or communication data received by the control unit, and to display the detection results regarding whether the detector's corresponding functions are normal for the operator's reference.

[0025] This embodiment utilizes a testing instrument integrating an analog acquisition unit, a digital output unit, a communication detection unit, and a control unit to detect the detection signals and communication data output by the detector. This enables comprehensive testing of various indicators and performance parameters of the detector, helping operators to quickly detect detector functions and locate faults.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A detection instrument for a comprehensive detector, characterized in that, At least including: The control unit, and an analog acquisition unit, a digital output unit, and a communication detection unit connected between the control unit and the detector; wherein, The analog acquisition unit is configured to acquire at least one detection signal collected by the detector and send it to the control unit; The digital output unit is configured to convert the enable signal output by the control unit into a digital signal and send the digital signal to the detector, so that the detector performs detection of the corresponding type of signal according to the digital signal; The communication detection unit is configured to acquire communication data sent by the detector under the control of the control unit; The control unit is configured to determine whether the corresponding function of the detector is normal based on the detection signal and / or the communication data.

2. The testing instrument according to claim 1, characterized in that, The analog acquisition unit includes at least one voltage divider protection circuit; wherein each voltage divider protection circuit includes at least: The system comprises a first voltage divider resistor, a second voltage divider resistor, a filter capacitor, and a TVS diode. One end of the first voltage divider resistor serves as the input terminal of the analog acquisition unit and is connected to one of the detection signal output terminals of the detector. The other end of the first voltage divider resistor is simultaneously connected to the first plate of the filter capacitor, one end of the second voltage divider resistor, and the negative terminal of the TVS diode. The second plate of the filter capacitor, the other end of the second voltage divider resistor, and the positive terminal of the TVS diode are grounded. The positive terminal of the TVS diode is led out from the output terminal of the analog acquisition unit and connected to the analog-to-digital conversion input terminal of the control unit.

3. The testing instrument according to claim 2, characterized in that, The number of voltage divider protection circuits is the same as the number of types of detection signals.

4. The testing instrument according to claim 1, characterized in that, The digital output unit includes at least: a digital-to-analog converter circuit, wherein the digital-to-analog converter circuit includes at least: The device comprises an optocoupler isolation chip and first to fourth protection resistors, wherein one end of each of the first to fourth protection resistors is connected to a first operating voltage, and the other end of each of the first to fourth protection resistors is connected to the first, third, fifth, and seventh pins of the optocoupler isolation chip, respectively; the second, fourth, sixth, and eighth pins of the optocoupler isolation chip are connected to the enable terminal of the control unit, respectively; the ninth, eleventh, thirteenth, and fifteenth pins of the optocoupler isolation chip are connected to the enable signal input terminal of the detector, respectively; and the tenth, twelfth, fourteenth, and sixteenth pins of the optocoupler isolation chip are all connected to a second operating voltage.

5. The testing instrument according to claim 1, characterized in that, The communication detection unit includes at least: a serial communication chip; the serial communication chip is model SP3232EEN.

6. The testing instrument according to claim 1, characterized in that, The control unit includes at least one microcontroller with an analog-to-digital conversion module.

7. The testing instrument according to claim 1, characterized in that, Also includes: A DC power supply unit is configured to supply power to the control unit and the detector.

8. The testing instrument according to claim 7, characterized in that, Also includes: The DC power supply unit includes at least: a first power supply circuit and a second power supply circuit, wherein... The first power supply circuit includes at least: a first power supply chip, a first capacitor to a seventh capacitor, a first inductor, and a first resistor to a third resistor. The second pin of the first power supply chip, one end of the first resistor, and the first plates of the first capacitors to the third capacitor are all connected to a first power supply voltage. The other end of the first resistor is connected to the seventh pin of the first power supply chip. The fourth and ninth pins of the first power supply chip, as well as the second plates of the first capacitors to the sixth capacitor, are all grounded. The first pin of the first power supply chip is connected to the first plate of the seventh capacitor. The second plate of the seventh capacitor and the third pin of the first power supply chip are connected to one end of the first inductor. The fifth pin of the first power supply chip is connected to the other end of the first inductor through the third resistor, and an output terminal of the first power supply circuit is led out. The second resistor is connected in series between the fifth pin and the ground terminal. The first plates of the fourth capacitor to the sixth capacitor are all connected to the output terminal of the first power supply circuit. The second power supply circuit includes at least: a second power supply chip, an eighth to thirteenth capacitor, a second inductor, a fourth to sixth resistor, a fuse, a first diode, and a second diode; wherein, the fifth pin of the second power supply chip and the first plates of the eighth to tenth capacitors are connected to the second power supply voltage; the first pin of the second power supply chip and the second plates of the eighth and ninth capacitors are grounded; the second plate of the tenth capacitor is connected to the fourth pin of the second power supply chip; the third and sixth pins of the second power supply chip are connected and then connected to one end of the second inductor; the cathode of the first diode is connected to one end of the second inductor; the cathode of the first diode is grounded; and the second pin of the second power supply chip is connected to the cathode of the second diode. The positive terminal of the second diode is connected to the power supply control terminal of the control unit. The other end of the second inductor is connected to the first plates of the eleventh to thirteenth capacitors. The second plates of the eleventh and twelfth capacitors are both grounded. One end of the fourth resistor is connected to the second pin of the second power supply chip. The other end of the fourth resistor is connected to one end of the fifth resistor. The other end of the fifth resistor is grounded. One end of the sixth resistor is connected to the first plate of the twelfth capacitor. The other end of the sixth resistor is connected to the other end of the fourth resistor. The second plate of the thirteenth capacitor is connected to one end of the fifth resistor. The first plate of the thirteenth capacitor is also connected to one end of the fuse. The other end of the fuse leads out to the output terminal of the second power supply circuit.

9. The testing instrument according to any one of claims 1 to 8, characterized in that, Also includes: The display unit is connected to the control unit and is configured to display the detection signal and / or communication data, and to indicate whether the corresponding functions of the detector are normal.

Images