Fire alarm simulation and sensor detection equipment for vehicle fire extinguishing and explosion suppression system

Abstract

The utility model discloses fire alarm simulation and sensor detection equipment for a vehicle fire extinguishing and explosion suppression system, which relates to the technical field of detection equipment and comprises a shell, a display screen is mounted on the surface of the shell, and a battery charging module, a battery, a power supply conversion module, a fire alarm simulation module, a fire alarm detection module and a CPU (central processing unit) are loaded in the shell. According to the utility model, an integrated shell design is realized, and each internal unit adopts a modular design, so that not only is the integrity of a detection function ensured, but also the requirements of firmness, durability, attractive appearance, portability and usability are met, and three types of sensors are provided for simulation and multi-channel output, and can be matched with most of fire extinguishing and explosion suppression system control boxes; meanwhile, the sensors can be conveniently detected in the vehicle, the fire alarm simulator is used for replacing a real sensor, the problem that the sensors need to be burnt by real flames in the testing process of the fire extinguishing and explosion suppression system is solved, and meanwhile the integrity of the three fire alarm sensors can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to fire alarm simulation and sensor detection equipment for a vehicle fire extinguishing and explosion suppression system. Background Art

[0002] This equipment is used for fire alarm simulation and fire alarm sensor detection of military vehicle fire extinguishing and explosion suppression systems. At present, military vehicle fire extinguishing and explosion suppression systems mainly use LEH flame receptors, optical detectors, and linear flame sensors to detect fire alarms. Most of the existing technical solutions integrate the fire alarm simulation function into the fire extinguishing and explosion suppression system detector, which cannot be universally used and is not convenient for use in vehicles. Therefore, a fire alarm simulation and sensor detection device for vehicle fire extinguishing and explosion suppression systems is proposed. Utility Model Content

[0003] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the utility model proposes a fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system, which includes a shell, a display screen is installed on the surface of the shell, and a battery charging module, a battery, a power conversion module, a fire alarm simulation module, a fire alarm detection module and a CPU are loaded inside the shell;

[0004] The battery charging module is connected to the battery and is used to convert the external input voltage into the voltage required for battery charging. The battery is connected to the power conversion module and is used to power and store electricity for the device. The power conversion module is respectively connected to the fire alarm simulation module and the fire alarm detection module and is used to convert the battery voltage into the voltage required by each circuit. The fire alarm simulation module is used to simulate the status signals output by different types of sensors. The fire alarm detection module is used to detect whether different sensors are normal, and is also used to set the normal, fire alarm and fault states of the simulated flame sensor for detecting the working state of the fire extinguishing and explosion suppression system; the fire alarm simulation module and the fire alarm detection module are both interconnected with the CPU, and the CPU is also connected to the display screen. The CPU is used to control system operation, data processing and drive display.

[0005] The utility model is further configured as follows: the fire alarm simulation module includes a LEH flame sensor simulation circuit, an optical detector simulation circuit and a linear flame sensor simulation circuit; the LEH flame sensor simulation circuit is used to simulate the LEH flame sensor, and is composed of a digital-to-analog conversion chip AD, an operational amplifier LM and a .V voltage reference circuit; the optical detector simulation circuit is used to simulate the optical detector, and is composed of a three-way power supply circuit, an output state selection circuit, an output channel selection circuit and a simulated load control circuit; the linear flame sensor simulation circuit is used to simulate the linear flame sensor, and the state change of the simulated linear flame sensor is realized by switching the output resistance and capacitance values ​​of the relay.

[0006] The utility model is further configured as follows: the fire alarm detection module includes a flame sensor detection circuit, an optical detector detection circuit and a linear flame sensor detection circuit, the flame sensor detection circuit includes a resistor and an operational amplifier for collecting the output voltage of the flame sensor; the optical detector detection circuit includes a resistor, a capacitor and an operational amplifier for collecting the output electrical signal of the optical detector; the linear flame sensor detection circuit includes a line switching circuit, a capacitor switching circuit and a resistor switching circuit for real-time collection of changes in resistance and capacitance values ​​of the linear flame sensor.

[0007] The utility model is further configured as follows: a metering interface, a switch, a communication interface and a charging interface which are electrically connected to each other are provided on the left outer wall of the shell, and the flame receptor interface, the optical detector interface and the linear flame sensor interface are respectively used to connect external cables.

[0008] The utility model is further configured as follows: the external cable is a detection cable or a simulation cable, the detection cable is used for externally connecting to a corresponding sensor, and the simulation cable is used for outputting an analog signal.

[0009] The beneficial technical effects of the utility model are as follows: the device adopts an integrated shell design, and each internal unit adopts a modular design, which not only ensures the integrity of the detection function, but also meets the requirements of durability, beautiful appearance, portability and ease of use. It has three types of sensor simulations and multi-channel output, and can be adapted to most fire extinguishing and explosion suppression system control boxes. It is also convenient to detect the sensor in the vehicle without having to remove the sensor for detection. The fire alarm simulator can be used instead of the real sensor, which solves the problem of using real flames to burn the sensor during the fire extinguishing and explosion suppression system test. At the same time, the integrity of the three fire alarm sensors can also be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Shown is a front view of the utility model.

[0011] Figure 2 The left side schematic diagram of the utility model is shown.

[0012] Figure 3 The right side schematic diagram of the utility model is shown.

[0013] Figure 4 The utility model is shown in the schematic diagram of the internal composition.

[0014] Figure 5 The utility model LEH flame sensor simulation circuit is shown.

[0015] Figure 6 The simulation block diagram of the LEH flame sensor of the utility model is shown.

[0016] Figure 7 The optical detector simulation circuit of the utility model is shown.

[0017] Figure 8 The utility model optical detector simulation block diagram is shown.

[0018] Fig. 9 The utility model shows a line flame sensor simulation circuit.

[0019] Fig.10 The utility model linear flame sensor simulation block diagram is shown.

[0020] Fig.11 The utility model LEH flame sensor detection circuit is shown.

[0021] Fig.12 The utility model LEH flame sensor detection block diagram is shown.

[0022] Fig.13 The optical detector detection circuit of the utility model is shown.

[0023] Fig.14 The utility model optical detector detection block diagram is shown.

[0024] Fig.15 The utility model shows a linear sensor detection circuit.

[0025] Fig.16 The utility model shows a linear sensor detection block diagram.

[0026] Figure numerals: 1. Shell, 2. Display screen, 3. Battery charging module, 4. Battery, 5. Power conversion module, 6. Fire alarm simulation module, 7. Fire alarm detection module, 8. CPU, 9. Corner guard, 10. Metering interface, 11. Switch, 12. Communication interface, 13. Charging interface, 14. Flame sensor interface, 15. Optical detector interface, 16. Linear flame sensor interface. DETAILED DESCRIPTION

[0027] Please refer to the attached Figure 1-16 Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] The utility model proposes a fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system, comprising a housing 1, a display screen 2 is mounted on the surface of the housing 1, and is characterized in that: a battery charging module 3, a battery 4, a power conversion module 5, a fire alarm simulation module 6, a fire alarm detection module 7 and a CPU 8 are loaded inside the housing 1;

[0029] The battery charging module 3 is connected to the battery 4 and is used to convert the external input voltage into the voltage required for battery charging. The battery charging module can convert the 24V voltage input by the charger or the 26V±4V voltage in the vehicle into the 12.6V voltage required for battery charging. The module has functions such as power detection and charging protection, and automatically cuts off the power when fully charged to protect the battery life; the battery 4 is connected to the power conversion module 5, which is used to power and store electricity for the device, which is convenient for use in outdoor vehicles and can also be charged through the power supply in the vehicle; the power conversion module 5 is respectively connected to the fire alarm simulation module 6 and the fire alarm detection module 7, which are used to convert the battery voltage into the voltage required by each circuit, and the power conversion module 5 is used to convert the 12V voltage output by the battery 4 into 5V, 3.3V and other voltages required by each part of the circuit; the fire alarm simulation module 6 is used to simulate the status signals output by different types of sensors, and the fire alarm detection module 7 is used to detect whether different sensors are normal, and is also used to set the normal, fire alarm and fault states of the simulated flame sensor for detecting the working state of the fire extinguishing and explosion suppression system; the fire alarm simulation module 6 and the fire alarm detection module 7 are both interconnected with the CPU 8, and the CPU 8 is also connected to the display screen 2, and the CPU 8 is used to control system operation, data processing and drive display.

[0030] The fire alarm simulation module 6 includes a LEH flame sensor simulation circuit, an optical detector simulation circuit and a linear flame sensor simulation circuit. The LEH flame sensor simulation circuit is used to simulate the LEH flame sensor, and is composed of two digital-to-analog conversion chips AD5724, two operational amplifiers LM324 and a 2.5V voltage reference circuit; the optical detector simulation circuit is used to simulate the optical detector, and is composed of a three-way power supply circuit, an output state selection circuit, an output channel selection circuit and a simulated load control circuit; the linear flame sensor simulation circuit is used to simulate the linear flame sensor, and the state change of the simulated linear flame sensor is realized by switching the output resistance and capacitance values ​​of the relay.

[0031] The fire alarm detection module 7 includes a flame sensor detection circuit, an optical detector detection circuit and a linear flame sensor detection circuit. The flame sensor detection circuit includes a resistor and an operational amplifier for collecting the output voltage of the flame sensor; the optical detector detection circuit includes a resistor, a capacitor and an operational amplifier for collecting the output electrical signal of the optical detector; the linear flame sensor detection circuit includes a line switching circuit, a capacitor switching circuit and a resistor switching circuit for real-time collection of changes in resistance and capacitance values ​​of the linear flame sensor, thereby judging the integrity of the three sensors.

[0032] The left outer wall of the housing 1 is provided with a metering interface 10, a switch 11, a communication interface 12 and a charging interface 13 which are electrically connected to each other. The metering interface is used to measure the performance of the device itself, the switch is used to start the device, the communication interface is used to export the test data of the device, and the charging interface is used to connect the battery charging module to charge the battery of the device. The flame sensor interface 14, the optical detector interface 15 and the linear flame sensor interface 16 are respectively used to connect external cables.

[0033] The external cable is a detection cable or a simulation cable. The detection cable is used to connect to the corresponding sensor, and the simulation cable is used to output a simulation signal. The LEH flame sensor simulation cable adopts a 1-to-8 structure and can simulate 8 LEH flame sensors at the same time. The optical detector simulation cable adopts a 1-to-4 structure and can simulate 4 optical detectors at the same time. The linear sensor cable simulation cable adopts a 1-to-2 structure and can simulate 2 linear sensors at the same time.

[0034] Example:

[0035] 1. LEH flame sensor simulation circuit

[0036] The output voltage of the LEH flame sensor is 0V when it is static, and it outputs a -500mV voltage signal when a fire alarm occurs. This part of the circuit consists of two digital-to-analog conversion chips AD5724, two operational amplifiers LM324 and a 2.5V voltage reference circuit. The circuit can output +5.0V to -5.0V voltage and can simulate 8 LEH flame sensor signals. The simulation circuit and block diagram are shown in the attached figure.

[0037] Simulation steps:

[0038] Step 1: First, the CPU processing circuit initializes the communication with the AD5724 negative pressure generating circuit and outputs a 0V voltage to put the simulated flame sensor in a normal state.

[0039] Step 2: Select the corresponding simulated flame sensor to output a fire alarm through the LCD screen. After the CPU processing circuit detects the fire alarm command, it controls the corresponding channel output to change from 0V to -500mV voltage, generating a fire alarm signal. After the fire alarm is canceled, the voltage changes from -500mV to 0V.

[0040] 2. Optical detector analog circuit

[0041] The optical detector outputs 0V or 7.5V (different models have different output voltages) in static state, and 2.0V or 4.8V (different fire sources or models have different output voltages) in fire alarm state. This part of the circuit consists of three-way power supply circuit, output state selection circuit, output channel selection circuit and analog load control circuit.

[0042] The three-way power supply circuit is used to simulate the three working states of the optical detector. The output state selection circuit is used to select which state the simulated optical detector outputs. The output channel selection circuit is used to control the output state of the 4-way optical detector. The simulated load control circuit is used to simulate the connection state of the optical detector. The fault setting function can be realized by controlling the connection of the simulated load.

[0043] Simulation steps:

[0044] Step 1: First, connect the simulated load to simulate the optical detector connected to the fire extinguishing and explosion suppression control box under test.

[0045] Step 2: Select the normal state 7.5V voltage output through the output state selection circuit.

[0046] Step 3: Select the corresponding analog optical detector to output the fire alarm through the LCD screen, the CPU processing circuit controls the output state to select the 4.8V power output, and controls the output channel to select the corresponding channel to output the fire alarm signal. After the fire alarm is canceled, the voltage switches from 4.8V to 7.5V output.

[0047] Step 4: Disconnect the corresponding load through simulated load control to simulate the disconnection of the optical detector and the fire extinguishing and explosion suppression control box to detect the self-test function of the fire extinguishing and explosion suppression control box.

[0048] 3. Linear flame sensor simulation circuit

[0049] Linear flame sensors are divided into two types: single parameter (resistance) and dual parameter (resistance, capacitance). When the sensor is burned by flame, the resistance value of the sensor decreases with the increase of temperature, and the capacitance value increases with the increase of temperature, which can determine the fire alarm.

[0050] This part of the circuit is composed of resistors, capacitors and relays. The state change of the simulated linear flame sensor is realized by switching the output resistance and capacitance values ​​through the relay.

[0051] Simulation steps:

[0052] Step 1: First, the resistance value of the linear sensor in the normal state is greater than or equal to 200MΩ, and the capacitance value is less than or equal to 1nF. The resistance and capacitance values ​​are matched with the fire extinguishing and explosion suppression control to be tested, so that the linear sensor is in the normal state.

[0053] Step 2: Select the corresponding analog line sensor to output the fire alarm through the LCD screen. The state selection circuit connects the 1kΩ resistor, 24nF capacitor in parallel with the 200MΩ resistor and 1nF capacitor. Since the resistance value of the resistors in parallel decreases, the resistance value of the capacitors in parallel increases. Thus, the resistance value of the analog line sensor decreases with the increase of temperature, and the capacitance value increases with the increase of temperature, achieving the function of simulating the fire alarm signal output.

[0054] 4. Flame sensor detection circuit

[0055] This circuit consists of resistors and operational amplifiers. When the flame sensor is burned by flame, the output voltage will gradually drop from 0V to -500mV as the temperature rises. The output voltage of the flame sensor is collected by AD to judge the integrity of the flame sensor.

[0056] Testing steps:

[0057] Step 1: First, use a flame to burn the LEH flame sensor. As the temperature increases, the output voltage of the flame sensor changes from 0V to -500mV.

[0058] Step 2: Amplify the signal by 3 times through the signal amplifier circuit and output it to the voltage acquisition circuit.

[0059] Step 3: The voltage acquisition circuit acquires the output voltage of the flame sensor in real time, processes the acquired data and sends it to the LCD screen for display, and judges the integrity of the flame sensor under test based on the displayed data.

[0060] Step 4: After the burning of the LEH flame sensor is stopped, the output voltage of the flame sensor changes from -500mV to 0V as the temperature decreases.

[0061] 5. Optical detector detection circuit

[0062] This circuit consists of resistors, capacitors and operational amplifiers. A standard flame is used to shine directly at the detector at a distance of 400mm. An electrical signal will be output within 5ms. The output electrical signal of the optical detector is collected by AD to determine the integrity of the optical detector.

[0063] Testing steps:

[0064] Step 1: First, use a standard flame to shine directly at the optical detector at a distance of 400mm to make it output a fire alarm voltage signal of 4.8V.

[0065] Step 2: The 4.8V fire alarm signal is first converted into 2.4V by the voltage divider circuit and then output to the voltage acquisition circuit by the voltage follower circuit.

[0066] Step 3: The voltage acquisition circuit acquires the output voltage of the optical detector in real time, processes the acquired data and sends it to the LCD screen for display, and judges the integrity of the optical detector under test based on the displayed data.

[0067] Step 4: After the direct flame stops, the 4.8V fire alarm signal disappears.

[0068] 6. Linear flame sensor detection circuit

[0069] This part of the circuit consists of a line switching circuit, a capacitor switching circuit, and a resistor switching circuit. Use a simulated fire source (alcohol lamp, gas lighter, etc.) to burn the linear flame sensor, and use this part of the circuit to collect the changes in the resistance and capacitance values ​​of the linear flame sensor in real time, so as to judge the integrity of the linear flame sensor.

[0070] Testing steps:

[0071] Step 1: Use a simulated fire source (alcohol lamp, gas lighter, etc.) to burn the wire flame sensor. When the sensor is burned by the flame, the resistance value of the sensor decreases with the increase of temperature, and the capacitance value increases with the increase of temperature.

[0072] Step 2: Select capacitance measurement, switch to capacitance measurement circuit through resistance and capacitance selection circuit, the capacitance measurement circuit converts the measured capacitance value into frequency and outputs it to frequency detection circuit, calculates capacitance value according to frequency value and displays it on LCD screen.

[0073] Step 3: Select resistance measurement, switch to the resistance measurement circuit through the resistance and capacitance selection circuit, the resistance measurement circuit converts the measured resistance value into frequency and outputs it to the frequency detection circuit, calculates the resistance value according to the frequency value, and displays it on the LCD screen.

[0074] Step 4: In normal state, the resistance value of the linear sensor is greater than or equal to 200MΩ, and the capacitance value is less than or equal to 1nF. In fire alarm state, the resistance value is less than 1kΩ, and the capacitance value is greater than 24nF. The integrity of the linear sensor is determined based on the resistance and capacitance values ​​displayed on the LCD screen.

[0075] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0076] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0077] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0078] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0079] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system, characterized in that: The invention comprises a housing (1), a display screen (2) being mounted on the surface of the housing (1), and is characterized in that a battery charging module (3), a battery (4), a power conversion module (5), a fire alarm simulation module (6), a fire alarm detection module (7) and a CPU (8) are loaded inside the housing (1); The battery charging module (3) is connected to the battery (4) and is used to convert the external input voltage into the voltage required for battery charging. The battery (4) is connected to the power conversion module (5) and is used to supply power to the device and store electricity. The power conversion module (5) is respectively connected to the fire alarm simulation module (6) and the fire alarm detection module (7) and is used to convert the battery voltage into the voltage required by each circuit. The fire alarm simulation module (6) is used to simulate the status signals output by different types of sensors. The fire alarm detection module (7) is used to detect whether different sensors are normal and is also used to set the normal, fire alarm and fault states of the simulated flame sensor for detecting the working state of the fire extinguishing and explosion suppression system. The fire alarm simulation module (6) and the fire alarm detection module (7) are both interconnected with the CPU (8). The CPU (8) is also connected to the display screen (2). The CPU (8) is used to control system operation, data processing and drive display.

2. The fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system according to claim 1, characterized in that: The fire alarm simulation module (6) comprises an LEH flame sensor simulation circuit, an optical detector simulation circuit and a linear flame sensor simulation circuit. The LEH flame sensor simulation circuit is used to simulate the LEH flame sensor and is composed of two digital-to-analog conversion chips AD5724, two operational amplifiers LM324 and a 2.5V voltage reference circuit; the optical detector simulation circuit is used to simulate the optical detector and is composed of a three-way power supply circuit, an output state selection circuit, an output channel selection circuit and a simulated load control circuit; the linear flame sensor simulation circuit is used to simulate the linear flame sensor and realizes the state change of the simulated linear flame sensor by switching the output resistance and capacitance values ​​of the relay.

3. The fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system according to claim 1, characterized in that: The fire alarm detection module (7) comprises a flame sensor detection circuit, an optical detector detection circuit and a linear flame sensor detection circuit. The flame sensor detection circuit comprises a resistor and an operational amplifier, and is used to collect the output voltage of the flame sensor; the optical detector detection circuit comprises a resistor, a capacitor and an operational amplifier, and is used to collect the output electrical signal of the optical detector; the linear flame sensor detection circuit comprises a line switching circuit, a capacitor switching circuit and a resistor switching circuit, and is used to collect the resistance value and capacitance value changes of the linear flame sensor in real time.

4. The fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a metering interface (10) for connecting an external cable, a switch (11), a communication interface (12), a charging interface (13), a flame sensor interface (14), an optical detector interface (15) and a linear flame sensor interface (16).

5. The fire alarm simulation and sensor detection device for a vehicle fire extinguishing and explosion suppression system according to claim 4, characterized in that: The external cable is a detection cable or an analog cable. The detection cable is used to be externally connected to a corresponding sensor, and the analog cable is used to output an analog signal.

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