A multifunctional test circuit for standard photoelectric pyrometers

Abstract

The present invention discloses a multifunctional test circuit applied to a standard photoelectric pyrometer, which relates to the field of signal testing technology. The present invention includes a photoelectric detector, a first switch, a calibration interface, a second switch, an amplifier, an analog output interface, a digital circuit module, a digital input interface, a chassis interface, and a chassis. The output signal of the photoelectric detector is connected to the calibration interface through the first switch, and then connected to the amplifier through the second switch. The amplifier outputs the signal through the analog output interface. The analog output interface is connected to the input interface of the digital circuit module through a cable. The analog output interface can also be connected to the chassis interface, and all circuits are installed inside the chassis. By switching different connection paths, the present invention can realize a variety of test functions without soldering wires or components after the whole device is assembled, thereby facilitating the use, debugging and fault location of the standard photoelectric pyrometer and realizing high-precision testing of the standard photoelectric pyrometer.

Description

Technical Field

[0001] The present invention relates to the technical field of signal testing, and in particular to a multifunctional testing circuit applied to a standard photoelectric pyrometer. Background Art

[0002] Most test instruments currently on the market typically have two interfaces reserved: power supply and signal output, enabling signal testing. In complete equipment applications, in addition to signal output, a reserved test interface facilitates fault location and improves equipment maintainability.

[0003] For photodetector signal amplification test equipment like standard photoelectric pyrometers, it's essential to perform photodetector output testing, amplifier electrical calibration, digital circuit calibration, analog output testing, and fault location. Furthermore, standard photoelectric pyrometer test results are susceptible to environmental influences. This multifunctional test circuit's reserved interfaces facilitate high-precision testing. Summary of the Invention

[0004] The primary purpose of the present invention is to provide a multifunctional test circuit for standard photoelectric pyrometers. By switching between different connection paths, the circuit can implement various test functions, including photoelectric detector amplification and acquisition, electrical calibration mode, digital circuit calibration mode, photoelectric detector output test mode, and analog output test mode. The present invention offers greater flexibility and can perform various test functions without unsoldering wires or components after the device is assembled. This facilitates the use, commissioning, and fault location of standard photoelectric pyrometers, enabling high-precision testing of standard photoelectric pyrometers.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] The present invention discloses a multifunctional test circuit for a standard photoelectric pyrometer, comprising a photodetector, a first switch, a calibration interface, a second switch, an amplifier, an analog output interface, a digital circuit module, a digital input interface, a chassis interface, and a chassis. The output signal of the photodetector is connected to the calibration interface via a first jumper or switch, and then to the amplifier via a second jumper or switch. The amplifier outputs the signal via the analog output interface, which is connected to the input interface of the digital circuit module via a cable. The analog output interface can also be connected to the chassis interface. The entire circuit is housed within the chassis.

[0007] This invention discloses a multifunctional test circuit for a standard photoelectric pyrometer. When disconnected, it includes a photodetector, an amplifier, an analog output interface, and a switch between the photodetector and amplifier. To demonstrate the various functions achieved by the amplifier circuit's reserved interfaces, the digital module's input interface and chassis interface are also included.

[0008] In the multifunctional test circuit applied to a standard photoelectric pyrometer, when the photoelectric detector is in an amplifying and collecting working state, two switches are closed to connect the photoelectric detector, the first switch, the calibration interface, the second switch, the amplifier, the analog output interface, and the input interface of the digital circuit module, thereby amplifying the detection signal of the photoelectric detector and processing the signal through the digital circuit module to output a digital signal.

[0009] In the multifunctional test circuit applied to a standard photoelectric pyrometer, when in an electrical calibration working state, the second switch is closed to realize the connection between the chassis interface, the calibration interface, the second switch, the amplifier, the analog output interface and the digital input interface, the calibration signal is input through the chassis interface, the amplifier is connected, and the amplifier analog output is tested.

[0010] In the multifunctional test circuit applied to a standard photoelectric pyrometer, in a digital calibration working state, a switch is disconnected to achieve connection between a chassis interface and a digital input interface, a calibration voltage is input through the chassis interface, and the output of the digital circuit module is tested.

[0011] In the multifunctional test circuit applied to a standard photoelectric pyrometer, when the photoelectric detector output test working state is in progress, the first switch is closed to connect the photoelectric detector, the first switch, the calibration interface and the chassis interface, and the output of the photoelectric detector is tested.

[0012] In the multifunctional test circuit applied to a standard photoelectric pyrometer, when in an analog output test working state, the switch is closed to achieve connection between the photoelectric detector, the first switch, the calibration interface, the second switch, the amplifier, the analog output interface and the chassis interface, and to test the analog output.

[0013] Furthermore, the first switch and the second switch are jumpers, switches or 0Ω resistors, and are used to perform on-off connection functions.

[0014] Beneficial effects:

[0015] 1. The present invention discloses a multifunctional test circuit for a standard photoelectric pyrometer. Interfaces and switches or jumpers are reserved on the standard photoelectric pyrometer signal amplification and acquisition circuit board. By switching different connection paths, multiple test functions such as photoelectric detector amplification and acquisition, electrical calibration mode, digital circuit calibration mode, photoelectric detector output test mode, and analog output test mode can be realized.

[0016] 2. The present invention discloses a multifunctional test circuit for a standard photoelectric pyrometer. Each functional test can be implemented through an interface after the entire device is assembled. There is no need to expose the circuit to the outside for testing, thereby ensuring high-precision testing of the standard photoelectric pyrometer.

[0017] 3. Compared with conventional equipment test circuits, the multifunctional test circuit for a standard photoelectric pyrometer disclosed in the present invention is more flexible to use and can realize multiple test functions without soldering wires or components, making it easier to use, debug, and locate faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an embodiment of the present invention.

[0019] Figure 2 This is the disconnected state of the embodiment of the present invention.

[0020] Figure 3 This is the normal working state of the embodiment of the present invention.

[0021] Figure 4 This is the electrical calibration mode of the embodiment of the present invention.

[0022] Figure 5 This is the digital circuit calibration mode of the embodiment of the present invention.

[0023] Figure 6 This is the photodetector output test mode of the embodiment of the present invention.

[0024] Figure 7 This is the analog output test mode of the embodiment of the present invention.

[0025] Among them: 1 - photoelectric detector, 2 - first switch, 3 - calibration interface, 4 - second switch, 5 - amplifier, 6 - analog output interface, 7 - digital circuit module, 8 - digital input interface, 9 - chassis interface, 10 - chassis. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific 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.

[0027] like Figure 1 As shown, this embodiment discloses a multifunctional test circuit for a standard photoelectric pyrometer, comprising a photoelectric detector 1, a first switch 2, a calibration interface 3, a second switch 4, an amplifier 5, an analog output interface 6, a digital circuit module 7, a digital input interface 8, a chassis interface 9, and a chassis 10. The output signal of the photoelectric detector 1 is connected to the calibration interface 3 via a first jumper or switch 2, and then to the amplifier 5 via a second jumper or switch 4. The amplifier outputs the signal through the analog output interface 6, which is connected to the input interface 8 of the digital circuit module 7 via a cable. The analog output interface 6 can also be connected to the chassis interface 9. The entire circuit is installed inside the chassis 10.

[0028] like Figure 2 As shown, this embodiment discloses a multifunctional test circuit for a standard photoelectric pyrometer. When not connected, it includes a photodetector, an amplifier, and an SMA output interface. A jumper det, an SMA interface, and a jumper amp are provided between the photodetector and the amplifier. The digital input interface is an SMA input. To facilitate demonstration of the various functions achieved after the amplifier board reserves the interface, the digital input interface and chassis interface are also provided. The digital input interface is an SMA input, and the chassis interface is an SMA to BNC converter. The photodetector 1, first switch 2, calibration interface 3, second switch 4, amplifier 5, analog output interface 6, digital circuit module 7, digital input interface 8, chassis interface 9, and chassis 10 are implemented corresponding to the photodetector, jumper det, SMA interface, jumper amp, amplifier, SMA output, SMA input, and SMA to BNC converter.

[0029] The implementation of each interface and jumper is not limited to the one given in this embodiment.

[0030] The working method of a multifunctional test circuit applied to a standard photoelectric pyrometer disclosed in this embodiment is as follows:

[0031] like Figure 3 In the described multifunctional test circuit for a standard photoelectric pyrometer, under normal operating conditions, two jumpers are connected to connect the photodetector, jumper det, SMA interface, jumper amp, amplifier, SMA output, and the SMA input interface of the digital board. This amplifies the photodetector's detection signal and then collects the signal through the digital board. Correspondingly, when the photodetector is in the amplification and collection operating state, two switches are closed to connect the photodetector 1, first switch 2, calibration interface 3, second switch 4, amplifier 5, analog output interface 6, and digital input interface 8. This amplifies the photodetector's detection signal and processes it through the digital circuit module to output a digital signal.

[0032] like Figure 4 In the multifunctional test circuit for a standard photoelectric pyrometer, when operating in electrical calibration mode, the jumper amp is connected to connect the chassis interface, SMA interface, jumper amp, amplifier, SMA output interface, and digital input SMA interface. A calibration signal is input through the chassis interface, the amplifier is connected, and the analog output is tested. Correspondingly, in the electrical calibration mode, the second switch 4 is closed to connect the chassis interface 8, calibration interface 3, second switch 4, amplifier 5, analog output interface 6, and digital input interface 8. A calibration signal is input through the chassis interface, the amplifier is connected, and the analog output is tested.

[0033] like Figure 5In the multifunctional test circuit for a standard photoelectric pyrometer, when in the digital circuit calibration mode, the jumper is disconnected to connect the chassis interface to the digital input SMA interface, and a calibration voltage is input through the chassis interface to test the output of the digital board. Correspondingly, when in the digital calibration mode, switches 2 and 4 are disconnected to connect chassis interface 9 to the digital input interface 8, and a calibration voltage is input through the chassis interface to test the output of the digital circuit module.

[0034] like Figure 6 In the multifunctional test circuit for a standard photoelectric pyrometer, when in the photodetector output test mode, jumper DET is connected to connect the photodetector, jumper DET, and SMA interface to the chassis interface to test the photodetector output. Correspondingly, when in the photodetector output test mode, first switch 2 is closed to connect photodetector 1, first switch 2, and calibration interface 3 to chassis interface 9 to test the photodetector output.

[0035] like Figure 7 In the analog output test mode, the multifunctional test circuit for a standard photoelectric pyrometer connects two jumpers to connect the photodetector, jumper det, SMA interface, jumper amp, amplifier, SMA output interface, and chassis interface to test the analog output. Correspondingly, in the analog output test mode, switches 2 and 4 are closed to connect the photodetector 1, first switch 2, interface 3, second switch 4, amplifier 5, analog output interface 6, and chassis interface 9 to test the analog output.

[0036] The above specific description further illustrates the purpose, technical solutions and beneficial effects of the invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multifunctional test circuit for a standard photoelectric pyrometer, characterized by: The invention comprises a photodetector (1), a first switch (2), a calibration interface (3), a second switch (4), an amplifier (5), an analog output interface (6), a digital circuit module (7), a digital input interface (8), a chassis interface (9), and a chassis (10); the output signal of the photodetector (1) is connected to the calibration interface (3) through the first switch (2), and then connected to the amplifier (5) through the second switch (4); the amplifier outputs the signal through the analog output interface (6); the analog output interface (6) is connected to the input interface (8) of the digital circuit module (7) through a cable; the analog output interface (6) can also be connected to the chassis interface (9); and all circuits are installed inside the chassis (10); By selecting the on / off state of the first switch (2) and the second switch (4), and selecting the cable connection state of each calibration interface (3), the analog output interface (6), the digital input interface (8), and the chassis interface (9), a variety of test functions such as signal amplification and acquisition, electrical calibration mode, digital circuit calibration mode, detector output test mode, and analog output test mode are realized; When the first switch (2) and the second switch (4) are both closed and the analog output interface (6) is connected to the digital input interface (8), the detector is in an amplification and acquisition mode. In this mode, the output signal of the photodetector (1) is amplified by the amplifier (5) and then acquired by the digital circuit module (7) and converted into a digital signal. When the first switch (2) is disconnected, the second switch (4) is closed, the analog output interface (6) is connected to the input interface (8) of the digital circuit module (7), and the calibration interface (3) is connected to the chassis interface (9), an electrical calibration mode is entered. In this mode, a standard signal is input from the outside through the chassis interface (9) to test the accuracy of the combination of the amplifier (5) and the digital circuit module (7); When the input interface (8) of the digital circuit module (7) is connected to the chassis interface (9), it is in a digital circuit calibration mode. In this mode, a standard voltage signal is input from the outside through the chassis interface (9) to test the accuracy of the digital circuit module (7); When the first switch (2) is closed, the second switch (4) is opened, and the calibration interface (3) is connected to the chassis interface (9), the detector outputs a test mode, and a precision digital multimeter is externally connected through the chassis interface (9) to measure the output of the detector; When the first switch (2) and the second switch (4) are both closed and the analog output interface (6) is connected to the chassis interface (9), it is in the analog output test mode. In this mode, a precision digital multimeter can be connected externally through the chassis interface (9) to measure the output of the analog circuit part composed of the detector and the amplifier.

2. A multifunctional test circuit for a standard photoelectric pyrometer according to claim 1, characterized in that: The first switch (2) and the second switch (4) are jumpers, switches or 0Ω resistors, and are used to perform on-off connection functions.

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