Fire alarm system product address encoder

Abstract

The utility model relates to the technical field of encoders, and particularly discloses an address encoder of a fire alarm system product, which comprises a shell, a main control circuit board is arranged in the shell and comprises a DC-DC conversion circuit, a 12V booster circuit, a 24V booster circuit, a signal sampling circuit, an amplifying circuit and a signal comparison circuit, the DC-DC conversion circuit is respectively and electrically connected with the signal sampling circuit and the 12V booster circuit, and the amplification circuit is respectively and electrically connected with the 12V booster circuit, the 24V booster circuit and the signal comparison circuit. According to the utility model, the signal sampling circuit is arranged to receive the input voltage, the voltage is maintained at the output end until the next sampling is started, the function of monitoring the voltage of the battery is realized, and the output power of the signal is increased through the amplifying circuit, so that the waveform of the output signal is controlled to be consistent with that of the input signal, but the amplitude is larger; therefore, an output signal stronger than an input signal is obtained, and the working stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of encoder technology, and in particular to an address encoder for a fire alarm system product. Background Technology

[0002] Address encoders are typically used for address encoding and parameter setting of field devices. During engineering commissioning and routine maintenance, when faulty components need to be replaced, address encoders must be used for setting before host linkage program debugging can be performed.

[0003] A search revealed that Chinese utility model patent CN201621482257.6 discloses a novel address encoder, comprising a device body, a circuit board installed inside the device body, a power module, a functional module, and a processing module. One end of the power module is connected to the functional module, and the other end is connected to the processing module. The power module is mounted on the circuit board. This novel address encoder features a novel design, utilizes keyboard operation for decimal number input, and is simple and easy to learn. It can read and write the address and sensitivity of detectors, as well as the address and operating mode of modular products. Furthermore, it can be used to browse equipment batch numbers and set the address of fire display panels, making on-site debugging and maintenance very convenient.

[0004] For example, Chinese invention patent application CN201910041129.X discloses an arc detector address encoder. This fire alarm system product address encoder includes a display module, a button module, a wireless module, a read / display module, a power module, a communication module, a storage module, a data transmission module, and a data receiving module. The display module displays the address encoding information of the arc detector; the button module modifies the address encoding information of the arc detector; the wireless module transmits wireless signals; the read / display module reads the address encoding information of the arc detector; the power module supplies power to the address encoder; the communication module transmits the address encoding information of the arc detector to the read / display module; and the storage module stores the address encoding information of the arc detector. This arc detector address encoder allows modification of the arc detector's communication address, is easy to operate, and is highly practical.

[0005] While the existing address encoders can meet basic usage requirements, they lack the function of monitoring battery voltage and cannot amplify the input signal to obtain a stronger output signal. Their operational stability needs to be improved. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a fire alarm system product address encoder that addresses the above-mentioned deficiencies of the prior art. By setting up a signal sampling circuit to receive the input voltage, the output voltage is maintained until the next sampling begins, thereby realizing the function of monitoring battery voltage. By using an amplification circuit to increase the output power of the signal, the waveform of the output signal is controlled to be consistent with the input signal, but with a larger amplitude, so as to obtain a stronger output signal than the input signal and improve the working stability.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A fire alarm system product address encoder includes a housing, within which a main control circuit board is disposed. The main control circuit board includes a DC-DC conversion circuit, a 12V boost circuit, a 24V boost circuit, a signal sampling circuit, an amplification circuit, and a signal comparison circuit. The DC-DC conversion circuit is electrically connected to the signal sampling circuit and the 12V boost circuit, respectively. The amplification circuit is electrically connected to the 12V boost circuit, the 24V boost circuit, and the signal comparison circuit, respectively.

[0009] Preferably, the DC-DC conversion circuit includes a voltage conversion chip U1, capacitors C29, C31, C32, C40, and C41, all of which are connected to the voltage conversion chip U1.

[0010] Preferably, the signal sampling circuit includes a signal input interface J1, a voltage regulator chip U5, an inductor L4, diodes D2, D4, D5, and D8, a battery BT1, a fuse F1, transistors Q2 and Q8, and a power switch S1. The voltage regulator chip U5 is connected to the signal input interface J1 and the inductor L4. The diodes D4 are connected to the inductor L4, the fuse F1, and the diode D2. The diode D2 is connected to the battery BT1. The transistor Q2 is connected to the voltage conversion chip U1, the fuse F1, the transistor Q8, and the diode D8. The power switch S1 and the diode D5 are both connected to the diode D8.

[0011] Preferably, the 12V boost circuit includes a boost chip U3, a transistor Q7, an inductor L3, a diode D9, and a triode Q9. The boost chip U3 is connected to the inductor L3 and the diode D9, and the transistor Q7 is connected to the voltage conversion chip U1, the triode Q9, and the inductor L3. The 24V boost circuit includes a boost chip U4, an inductor L2, and a diode D10. The boost chip U4 is connected to the inductor L2 and the diode D10.

[0012] Preferably, the amplifier circuit includes diode D1, diode D3, transistor Q4, transistor Q6, transistor Q10 and fuse F2, wherein diode D1 is connected to diode D9, diode D3, transistor Q10 and transistor Q6 respectively, and transistor Q6 is connected to fuse F2.

[0013] Preferably, the signal comparison circuit includes operational amplifier UH1A, operational amplifier UH1B, resistor R15 and diode D7, wherein resistor R15 is connected to transistor Q4, diode D7 and operational amplifier UH1A respectively.

[0014] By adopting the above technical solution, the fire alarm system product address encoder provided by this utility model has the following beneficial effects: The DC-DC conversion circuit in the fire alarm system product address encoder is electrically connected to the signal sampling circuit and the 12V boost circuit respectively. The amplification circuit is electrically connected to the 12V boost circuit, the 24V boost circuit and the signal comparison circuit respectively. By setting the signal sampling circuit to receive the input voltage, the output voltage is maintained at the output terminal until the next sampling begins, thereby realizing the function of monitoring the battery voltage. By increasing the output power of the signal through the amplification circuit, the waveform of the output signal is controlled to be consistent with the input signal, but with a larger amplitude, so as to obtain a stronger output signal than the input signal, thereby improving the working stability and achieving high working stability. Attached Figure Description

[0015] Figure 1 This is an exploded view of the present invention;

[0016] Figure 2 This is the front view of the present invention;

[0017] Figure 3 This is a circuit diagram of the main control circuit board in this utility model;

[0018] In the diagram, 1-upper shell, 2-lower shell, 3-battery cover, 4-main control circuit board, 5-display screen, 6-button. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] like Figure 1-3 As shown, the fire alarm system product address encoder includes a housing, inside which is a main control circuit board 4. The main control circuit board 4 includes a DC-DC conversion circuit, a 12V boost circuit, a 24V boost circuit, a signal sampling circuit, an amplification circuit, and a signal comparison circuit. The DC-DC conversion circuit is electrically connected to the signal sampling circuit and the 12V boost circuit, respectively. The amplification circuit is electrically connected to the 12V boost circuit, the 24V boost circuit, and the signal comparison circuit, respectively. The housing includes an upper shell 1 and a lower shell 2. The upper shell 1 is mounted on the front end of the lower shell 2. A battery cover 3 is mounted on the back of the lower shell 2. Both the upper shell 1 and the battery cover 3 are snap-fitted to the lower shell 2. A display screen 5 and several buttons 6 are located on the front end of the upper shell 1. The display screen 5 and the buttons 6 are electrically connected to the main control circuit board 4. The display screen 5 is used to display all information about the detector and its modules, as well as relevant information input by the operator, and can also display the current power consumption. The button 6 is used to input relevant information in conjunction with the LCD screen and to operate the function buttons to change the display content. The lower shell 2 has a battery compartment for holding two AAA alkaline batteries to power the address encoder of the fire alarm system. The main control circuit board 4 can be equipped with a bus connection port for encoding and other operations on the detector and its modules. The address encoder of the fire alarm system uses an industrial-grade 32-bit high-reliability microprocessor. The address parameters to be set can be changed through the human-machine interface, and the product address code can also be read at any time, which is convenient for engineering maintenance.

[0023] Specifically, the DC-DC conversion circuit includes a voltage conversion chip U1, capacitors C29, C31, C32, C40, and C41. All capacitors C29, C31, C32, C40, and C41 are connected to the voltage conversion chip U1. It is understood that the voltage conversion chip U1 uses an ETA1061 chip. This DC-DC conversion circuit, as a miniaturized power switch module, utilizes microelectronics technology to assemble small surface-mount integrated circuits and microelectronic components into a single unit. It converts the input DC voltage of 3V and boosts it to the design-required voltage value, achieving isolation protection and overcurrent protection.

[0024] Specifically, the signal sampling circuit includes a signal input interface J1, a voltage regulator chip U5, an inductor L4, diodes D2, D4, D5, and D8, a battery BT1, a fuse F1, transistors Q2 and Q8, and a power switch S1. The voltage regulator chip U5 is connected to the signal input interface J1 and inductor L4. Diode D4 is connected to inductor L4, fuse F1, and diode D2. Diode D2 is connected to battery BT1. Transistor Q2 is connected to voltage conversion chip U1, fuse F1, transistor Q8, and diode D8. The power switch S1 and diode D5 are both connected to diode D8. This signal sampling circuit has one analog signal input, one control signal input, and one analog signal output. The circuit's function is to receive the input voltage at a specified time and maintain that voltage at the output until the next sampling begins. Sampling operates in one of two states: sampling state and holding state. The sampling determines whether the circuit is powered by USB or battery. When the battery voltage is <2.5V, the address encoder of this fire alarm system will fail to write and read codes, the system will prompt "Replace Battery", and the backlight of the display screen will turn off. In this case, a new battery should be purchased in time to enable the encoder to work normally. The encoder has a low-power mode. After 20 seconds of no button operation and the LCD backlight turned off, the encoder will automatically shut down after 1 minute. This saves power and reduces the need for battery replacement. When it is needed to work, press and hold the "On / Off" button to wake it up from the power-off mode and continue working.

[0025] Specifically, the 12V boost circuit includes a boost chip U3, a transistor Q7, an inductor L3, a diode D9, and a transistor Q9. The boost chip U3 is connected to the inductor L3 and the diode D9, and the transistor Q7 is connected to the voltage conversion chip U1, the transistor Q9, and the inductor L3. The 24V boost circuit includes a boost chip U4, an inductor L2, and a diode D10. The boost chip U4 is connected to the inductor L2 and the diode D10. It is understood that the boost chip U3 uses an SGM6623 chip, and the boost chip U4 uses an MT3608 chip. The 12V boost circuit boosts the 3V voltage to 12V to power the relevant circuits; the 24V boost circuit boosts the 12V voltage to 24V to power the relevant circuits.

[0026] Specifically, the amplifier circuit includes diodes D1 and D3, transistors Q4 and Q6, transistor Q10, and fuse F2. Diode D1 is connected to diodes D9 and D3, transistor Q10, and transistor Q6, respectively. Transistor Q6 is connected to fuse F2. Understandably, this amplifier circuit is used to increase the output power of the signal. It obtains its energy from a power supply to control the waveform of the output signal to be consistent with the input signal, but with a larger amplitude, in order to obtain a stronger output signal than the input signal.

[0027] Specifically, the signal comparison circuit includes operational amplifiers UH1A and UH1B, resistor R15, and diode D7. Resistor R15 is connected to transistor Q4, diode D7, and operational amplifier UH1A, respectively. Understandably, this signal comparison circuit is used to compare two or more data items to determine if they are equal or to determine the relationship between them, thereby enabling the encoder to perform read / write address, read / write threshold, or other operations. The bus connector consists of two wires. When programming detectors, modules, audible / visual alarms, manual alarms, fire hydrant buttons, or performing other parameter settings and adjustments, simply connect it to the two output lines of the address encoder. Because fire alarm products use a two-wire design with no polarity restrictions, there is no need to worry about reverse connection.

[0028] Understandably, this utility model has a reasonable design and unique structure. It receives the input voltage by setting a signal sampling circuit and maintains the voltage at the output terminal until the next sampling begins, thereby realizing the function of monitoring battery voltage. The output power of the signal is increased by an amplification circuit to control the waveform of the output signal to be consistent with the input signal, but with a larger amplitude, so as to obtain a stronger output signal than the input signal, improve the working stability, and achieve high working stability.

[0029] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A fire alarm system product address encoder, comprising a housing, wherein a main control circuit board is disposed within the housing, characterized in that: The main control circuit board includes a DC-DC conversion circuit, a 12V boost circuit, a 24V boost circuit, a signal sampling circuit, an amplification circuit, and a signal comparison circuit. The DC-DC conversion circuit is electrically connected to the signal sampling circuit and the 12V boost circuit, respectively. The amplification circuit is electrically connected to the 12V boost circuit, the 24V boost circuit, and the signal comparison circuit, respectively.

2. The fire alarm system product address encoder according to claim 1, characterized in that: The DC-DC conversion circuit includes a voltage conversion chip U1, capacitors C29, C31, C32, C40, and C41, all of which are connected to the voltage conversion chip U1.

3. The fire alarm system product address encoder according to claim 2, characterized in that: The signal sampling circuit includes a signal input interface J1, a voltage regulator chip U5, an inductor L4, diodes D2, D4, D5, and D8, a battery BT1, a fuse F1, transistors Q2 and Q8, and a power switch S1. The voltage regulator chip U5 is connected to the signal input interface J1 and the inductor L4. The diodes D4 are connected to the inductor L4, the fuse F1, and the diode D2. The diode D2 is connected to the battery BT1. The transistor Q2 is connected to the voltage conversion chip U1, the fuse F1, the transistor Q8, and the diode D8. The power switch S1 and the diode D5 are both connected to the diode D8.

4. The fire alarm system product address encoder according to claim 2, characterized in that: The 12V boost circuit includes a boost chip U3, a transistor Q7, an inductor L3, a diode D9, and a triode Q9. The boost chip U3 is connected to the inductor L3 and the diode D9, and the transistor Q7 is connected to the voltage conversion chip U1, the triode Q9, and the inductor L3. The 24V boost circuit includes a boost chip U4, an inductor L2, and a diode D10. The boost chip U4 is connected to the inductor L2 and the diode D10.

5. The fire alarm system product address encoder according to claim 4, characterized in that: The amplifier circuit includes diode D1, diode D3, transistor Q4, transistor Q6, transistor Q10 and fuse F2. Diode D1 is connected to diode D9, diode D3, transistor Q10 and transistor Q6 respectively, and transistor Q6 is connected to fuse F2.

6. The fire alarm system product address encoder according to claim 5, characterized in that: The signal comparison circuit includes operational amplifier UH1A, operational amplifier UH1B, resistor R15 and diode D7. Resistor R15 is connected to transistor Q4, diode D7 and operational amplifier UH1A respectively.

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